MagickCore  6.9.13-16
Convert, Edit, Or Compose Bitmap Images
draw.c
1 /*
2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3 % %
4 % %
5 % %
6 % DDDD RRRR AAA W W %
7 % D D R R A A W W %
8 % D D RRRR AAAAA W W W %
9 % D D R RN A A WW WW %
10 % DDDD R R A A W W %
11 % %
12 % %
13 % MagickCore Image Drawing Methods %
14 % %
15 % %
16 % Software Design %
17 % Cristy %
18 % July 1998 %
19 % %
20 % %
21 % Copyright 1999 ImageMagick Studio LLC, a non-profit organization %
22 % dedicated to making software imaging solutions freely available. %
23 % %
24 % You may not use this file except in compliance with the License. You may %
25 % obtain a copy of the License at %
26 % %
27 % https://imagemagick.org/script/license.php %
28 % %
29 % Unless required by applicable law or agreed to in writing, software %
30 % distributed under the License is distributed on an "AS IS" BASIS, %
31 % WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
32 % See the License for the specific language governing permissions and %
33 % limitations under the License. %
34 % %
35 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
36 %
37 % Bill Radcliffe of Corbis (www.corbis.com) contributed the polygon
38 % rendering code based on Paul Heckbert's "Concave Polygon Scan Conversion",
39 % Graphics Gems, 1990. Leonard Rosenthal and David Harr of Appligent
40 % (www.appligent.com) contributed the dash pattern, linecap stroking
41 % algorithm, and minor rendering improvements.
42 %
43 */
44 
45 /*
46  Include declarations.
47 */
48 #include "magick/studio.h"
49 #include "magick/annotate.h"
50 #include "magick/artifact.h"
51 #include "magick/blob.h"
52 #include "magick/cache.h"
53 #include "magick/cache-private.h"
54 #include "magick/cache-view.h"
55 #include "magick/channel.h"
56 #include "magick/color.h"
57 #include "magick/color-private.h"
58 #include "magick/colorspace.h"
59 #include "magick/colorspace-private.h"
60 #include "magick/composite.h"
61 #include "magick/composite-private.h"
62 #include "magick/constitute.h"
63 #include "magick/draw.h"
64 #include "magick/draw-private.h"
65 #include "magick/enhance.h"
66 #include "magick/exception.h"
67 #include "magick/exception-private.h"
68 #include "magick/gem.h"
69 #include "magick/geometry.h"
70 #include "magick/image-private.h"
71 #include "magick/list.h"
72 #include "magick/log.h"
73 #include "magick/magick.h"
74 #include "magick/memory-private.h"
75 #include "magick/monitor.h"
76 #include "magick/monitor-private.h"
77 #include "magick/option.h"
78 #include "magick/paint.h"
79 #include "magick/pixel-accessor.h"
80 #include "magick/pixel-private.h"
81 #include "magick/property.h"
82 #include "magick/resample.h"
83 #include "magick/resample-private.h"
84 #include "magick/resource_.h"
85 #include "magick/splay-tree.h"
86 #include "magick/string_.h"
87 #include "magick/string-private.h"
88 #include "magick/thread-private.h"
89 #include "magick/token.h"
90 #include "magick/transform.h"
91 #include "magick/utility.h"
92 
93 /*
94  Define declarations.
95 */
96 #define AntialiasThreshold (1.0/3.0)
97 #define BezierQuantum 200
98 #define PrimitiveExtentPad 4296.0
99 #define MaxBezierCoordinates 67108864
100 #define ThrowPointExpectedException(image,token) \
101 { \
102  (void) ThrowMagickException(&(image)->exception,GetMagickModule(),DrawError, \
103  "NonconformingDrawingPrimitiveDefinition","`%s'",token); \
104  status=MagickFalse; \
105  break; \
106 }
107 
108 /*
109  Typedef declarations.
110 */
111 typedef struct _EdgeInfo
112 {
114  bounds;
115 
116  double
117  scanline;
118 
119  PointInfo
120  *points;
121 
122  size_t
123  number_points;
124 
125  ssize_t
126  direction;
127 
128  MagickBooleanType
129  ghostline;
130 
131  size_t
132  highwater;
133 } EdgeInfo;
134 
135 typedef struct _ElementInfo
136 {
137  double
138  cx,
139  cy,
140  major,
141  minor,
142  angle;
143 } ElementInfo;
144 
145 typedef struct _MVGInfo
146 {
148  **primitive_info;
149 
150  size_t
151  *extent;
152 
153  ssize_t
154  offset;
155 
156  PointInfo
157  point;
158 
160  *exception;
161 } MVGInfo;
162 
163 typedef struct _PolygonInfo
164 {
165  EdgeInfo
166  *edges;
167 
168  size_t
169  number_edges;
170 } PolygonInfo;
171 
172 typedef enum
173 {
174  MoveToCode,
175  OpenCode,
176  GhostlineCode,
177  LineToCode,
178  EndCode
179 } PathInfoCode;
180 
181 typedef struct _PathInfo
182 {
183  PointInfo
184  point;
185 
186  PathInfoCode
187  code;
188 } PathInfo;
189 
190 /*
191  Forward declarations.
192 */
193 static Image
194  *DrawClippingMask(Image *,const DrawInfo *,const char *,const char *,
195  ExceptionInfo *);
196 
197 static MagickBooleanType
198  DrawStrokePolygon(Image *,const DrawInfo *,const PrimitiveInfo *),
199  RenderMVGContent(Image *,const DrawInfo *,const size_t),
200  TraceArc(MVGInfo *,const PointInfo,const PointInfo,const PointInfo),
201  TraceArcPath(MVGInfo *,const PointInfo,const PointInfo,const PointInfo,
202  const double,const MagickBooleanType,const MagickBooleanType),
203  TraceBezier(MVGInfo *,const size_t),
204  TraceCircle(MVGInfo *,const PointInfo,const PointInfo),
205  TraceEllipse(MVGInfo *,const PointInfo,const PointInfo,const PointInfo),
206  TraceLine(PrimitiveInfo *,const PointInfo,const PointInfo),
207  TraceRectangle(PrimitiveInfo *,const PointInfo,const PointInfo),
208  TraceRoundRectangle(MVGInfo *,const PointInfo,const PointInfo,PointInfo),
209  TraceSquareLinecap(PrimitiveInfo *,const size_t,const double);
210 
211 static PrimitiveInfo
212  *TraceStrokePolygon(const DrawInfo *,const PrimitiveInfo *,ExceptionInfo *);
213 
214 static ssize_t
215  TracePath(Image *,MVGInfo *,const char *);
216 
217 /*
218 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
219 % %
220 % %
221 % %
222 % A c q u i r e D r a w I n f o %
223 % %
224 % %
225 % %
226 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
227 %
228 % AcquireDrawInfo() returns a DrawInfo structure properly initialized.
229 %
230 % The format of the AcquireDrawInfo method is:
231 %
232 % DrawInfo *AcquireDrawInfo(void)
233 %
234 */
235 MagickExport DrawInfo *AcquireDrawInfo(void)
236 {
237  DrawInfo
238  *draw_info;
239 
240  draw_info=(DrawInfo *) AcquireCriticalMemory(sizeof(*draw_info));
241  GetDrawInfo((ImageInfo *) NULL,draw_info);
242  return(draw_info);
243 }
244 
245 /*
246 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
247 % %
248 % %
249 % %
250 % C l o n e D r a w I n f o %
251 % %
252 % %
253 % %
254 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
255 %
256 % CloneDrawInfo() makes a copy of the given draw_info structure. If NULL
257 % is specified, a new DrawInfo structure is created initialized to default
258 % values.
259 %
260 % The format of the CloneDrawInfo method is:
261 %
262 % DrawInfo *CloneDrawInfo(const ImageInfo *image_info,
263 % const DrawInfo *draw_info)
264 %
265 % A description of each parameter follows:
266 %
267 % o image_info: the image info.
268 %
269 % o draw_info: the draw info.
270 %
271 */
272 MagickExport DrawInfo *CloneDrawInfo(const ImageInfo *image_info,
273  const DrawInfo *draw_info)
274 {
275  DrawInfo
276  *clone_info;
277 
278  clone_info=(DrawInfo *) AcquireCriticalMemory(sizeof(*clone_info));
279  GetDrawInfo(image_info,clone_info);
280  if (draw_info == (DrawInfo *) NULL)
281  return(clone_info);
282  if (draw_info->id != (char *) NULL)
283  (void) CloneString(&clone_info->id,draw_info->id);
284  if (draw_info->primitive != (char *) NULL)
285  (void) CloneString(&clone_info->primitive,draw_info->primitive);
286  if (draw_info->geometry != (char *) NULL)
287  (void) CloneString(&clone_info->geometry,draw_info->geometry);
288  clone_info->compliance=draw_info->compliance;
289  clone_info->viewbox=draw_info->viewbox;
290  clone_info->affine=draw_info->affine;
291  clone_info->gravity=draw_info->gravity;
292  clone_info->fill=draw_info->fill;
293  clone_info->stroke=draw_info->stroke;
294  clone_info->stroke_width=draw_info->stroke_width;
295  if (draw_info->fill_pattern != (Image *) NULL)
296  clone_info->fill_pattern=CloneImage(draw_info->fill_pattern,0,0,MagickTrue,
297  &draw_info->fill_pattern->exception);
298  else
299  if (draw_info->tile != (Image *) NULL)
300  clone_info->fill_pattern=CloneImage(draw_info->tile,0,0,MagickTrue,
301  &draw_info->tile->exception);
302  clone_info->tile=NewImageList(); /* tile is deprecated */
303  if (draw_info->stroke_pattern != (Image *) NULL)
304  clone_info->stroke_pattern=CloneImage(draw_info->stroke_pattern,0,0,
305  MagickTrue,&draw_info->stroke_pattern->exception);
306  clone_info->stroke_antialias=draw_info->stroke_antialias;
307  clone_info->text_antialias=draw_info->text_antialias;
308  clone_info->fill_rule=draw_info->fill_rule;
309  clone_info->linecap=draw_info->linecap;
310  clone_info->linejoin=draw_info->linejoin;
311  clone_info->miterlimit=draw_info->miterlimit;
312  clone_info->dash_offset=draw_info->dash_offset;
313  clone_info->decorate=draw_info->decorate;
314  clone_info->compose=draw_info->compose;
315  if (draw_info->text != (char *) NULL)
316  (void) CloneString(&clone_info->text,draw_info->text);
317  if (draw_info->font != (char *) NULL)
318  (void) CloneString(&clone_info->font,draw_info->font);
319  if (draw_info->metrics != (char *) NULL)
320  (void) CloneString(&clone_info->metrics,draw_info->metrics);
321  if (draw_info->family != (char *) NULL)
322  (void) CloneString(&clone_info->family,draw_info->family);
323  clone_info->style=draw_info->style;
324  clone_info->stretch=draw_info->stretch;
325  clone_info->weight=draw_info->weight;
326  if (draw_info->encoding != (char *) NULL)
327  (void) CloneString(&clone_info->encoding,draw_info->encoding);
328  clone_info->pointsize=draw_info->pointsize;
329  clone_info->kerning=draw_info->kerning;
330  clone_info->interline_spacing=draw_info->interline_spacing;
331  clone_info->interword_spacing=draw_info->interword_spacing;
332  clone_info->direction=draw_info->direction;
333  if (draw_info->density != (char *) NULL)
334  (void) CloneString(&clone_info->density,draw_info->density);
335  clone_info->align=draw_info->align;
336  clone_info->undercolor=draw_info->undercolor;
337  clone_info->border_color=draw_info->border_color;
338  if (draw_info->server_name != (char *) NULL)
339  (void) CloneString(&clone_info->server_name,draw_info->server_name);
340  if (draw_info->dash_pattern != (double *) NULL)
341  {
342  ssize_t
343  x;
344 
345  for (x=0; fabs(draw_info->dash_pattern[x]) >= MagickEpsilon; x++) ;
346  clone_info->dash_pattern=(double *) AcquireQuantumMemory((size_t) (2*x+2),
347  sizeof(*clone_info->dash_pattern));
348  if (clone_info->dash_pattern == (double *) NULL)
349  ThrowFatalException(ResourceLimitFatalError,
350  "UnableToAllocateDashPattern");
351  (void) memset(clone_info->dash_pattern,0,(size_t) (2*x+2)*
352  sizeof(*clone_info->dash_pattern));
353  (void) memcpy(clone_info->dash_pattern,draw_info->dash_pattern,(size_t)
354  (x+1)*sizeof(*clone_info->dash_pattern));
355  }
356  clone_info->gradient=draw_info->gradient;
357  if (draw_info->gradient.stops != (StopInfo *) NULL)
358  {
359  size_t
360  number_stops;
361 
362  number_stops=clone_info->gradient.number_stops;
363  clone_info->gradient.stops=(StopInfo *) AcquireQuantumMemory((size_t)
364  number_stops,sizeof(*clone_info->gradient.stops));
365  if (clone_info->gradient.stops == (StopInfo *) NULL)
366  ThrowFatalException(ResourceLimitFatalError,
367  "UnableToAllocateDashPattern");
368  (void) memcpy(clone_info->gradient.stops,draw_info->gradient.stops,
369  (size_t) number_stops*sizeof(*clone_info->gradient.stops));
370  }
371  clone_info->bounds=draw_info->bounds;
372  clone_info->fill_opacity=draw_info->fill_opacity;
373  clone_info->stroke_opacity=draw_info->stroke_opacity;
374  clone_info->element_reference=draw_info->element_reference;
375  clone_info->clip_path=draw_info->clip_path;
376  clone_info->clip_units=draw_info->clip_units;
377  if (draw_info->clip_mask != (char *) NULL)
378  (void) CloneString(&clone_info->clip_mask,draw_info->clip_mask);
379  if (draw_info->clipping_mask != (Image *) NULL)
380  clone_info->clipping_mask=CloneImage(draw_info->clipping_mask,0,0,
381  MagickTrue,&draw_info->clipping_mask->exception);
382  if (draw_info->composite_mask != (Image *) NULL)
383  clone_info->composite_mask=CloneImage(draw_info->composite_mask,0,0,
384  MagickTrue,&draw_info->composite_mask->exception);
385  clone_info->render=draw_info->render;
386  clone_info->debug=draw_info->debug;
387  return(clone_info);
388 }
389 
390 /*
391 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
392 % %
393 % %
394 % %
395 + C o n v e r t P a t h T o P o l y g o n %
396 % %
397 % %
398 % %
399 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
400 %
401 % ConvertPathToPolygon() converts a path to the more efficient sorted
402 % rendering form.
403 %
404 % The format of the ConvertPathToPolygon method is:
405 %
406 % PolygonInfo *ConvertPathToPolygon(const PathInfo *path_info,
407 % ExceptionInfo *exception)
408 %
409 % A description of each parameter follows:
410 %
411 % o ConvertPathToPolygon() returns the path in a more efficient sorted
412 % rendering form of type PolygonInfo.
413 %
414 % o draw_info: Specifies a pointer to an DrawInfo structure.
415 %
416 % o path_info: Specifies a pointer to an PathInfo structure.
417 %
418 % o exception: return any errors or warnings in this structure.
419 %
420 */
421 
422 static PolygonInfo *DestroyPolygonInfo(PolygonInfo *polygon_info)
423 {
424  ssize_t
425  i;
426 
427  if (polygon_info->edges != (EdgeInfo *) NULL)
428  {
429  for (i=0; i < (ssize_t) polygon_info->number_edges; i++)
430  if (polygon_info->edges[i].points != (PointInfo *) NULL)
431  polygon_info->edges[i].points=(PointInfo *)
432  RelinquishMagickMemory(polygon_info->edges[i].points);
433  polygon_info->edges=(EdgeInfo *) RelinquishMagickMemory(
434  polygon_info->edges);
435  }
436  return((PolygonInfo *) RelinquishMagickMemory(polygon_info));
437 }
438 
439 #if defined(__cplusplus) || defined(c_plusplus)
440 extern "C" {
441 #endif
442 
443 static int DrawCompareEdges(const void *p_edge,const void *q_edge)
444 {
445 #define DrawCompareEdge(p,q) \
446 { \
447  if (((p)-(q)) < 0.0) \
448  return(-1); \
449  if (((p)-(q)) > 0.0) \
450  return(1); \
451 }
452 
453  const PointInfo
454  *p,
455  *q;
456 
457  /*
458  Edge sorting for right-handed coordinate system.
459  */
460  p=((const EdgeInfo *) p_edge)->points;
461  q=((const EdgeInfo *) q_edge)->points;
462  DrawCompareEdge(p[0].y,q[0].y);
463  DrawCompareEdge(p[0].x,q[0].x);
464  DrawCompareEdge((p[1].x-p[0].x)*(q[1].y-q[0].y),(p[1].y-p[0].y)*
465  (q[1].x-q[0].x));
466  DrawCompareEdge(p[1].y,q[1].y);
467  DrawCompareEdge(p[1].x,q[1].x);
468  return(0);
469 }
470 
471 #if defined(__cplusplus) || defined(c_plusplus)
472 }
473 #endif
474 
475 static void LogPolygonInfo(const PolygonInfo *polygon_info)
476 {
477  EdgeInfo
478  *p;
479 
480  ssize_t
481  i,
482  j;
483 
484  (void) LogMagickEvent(DrawEvent,GetMagickModule()," begin active-edge");
485  p=polygon_info->edges;
486  for (i=0; i < (ssize_t) polygon_info->number_edges; i++)
487  {
488  (void) LogMagickEvent(DrawEvent,GetMagickModule()," edge %.20g:",
489  (double) i);
490  (void) LogMagickEvent(DrawEvent,GetMagickModule()," direction: %s",
491  p->direction != MagickFalse ? "down" : "up");
492  (void) LogMagickEvent(DrawEvent,GetMagickModule()," ghostline: %s",
493  p->ghostline != MagickFalse ? "transparent" : "opaque");
494  (void) LogMagickEvent(DrawEvent,GetMagickModule(),
495  " bounds: %g,%g - %g,%g",p->bounds.x1,p->bounds.y1,
496  p->bounds.x2,p->bounds.y2);
497  for (j=0; j < (ssize_t) p->number_points; j++)
498  (void) LogMagickEvent(DrawEvent,GetMagickModule()," %g,%g",
499  p->points[j].x,p->points[j].y);
500  p++;
501  }
502  (void) LogMagickEvent(DrawEvent,GetMagickModule()," end active-edge");
503 }
504 
505 static void ReversePoints(PointInfo *points,const size_t number_points)
506 {
507  PointInfo
508  point;
509 
510  ssize_t
511  i;
512 
513  for (i=0; i < (ssize_t) (number_points >> 1); i++)
514  {
515  point=points[i];
516  points[i]=points[number_points-(i+1)];
517  points[number_points-(i+1)]=point;
518  }
519 }
520 
521 static PolygonInfo *ConvertPathToPolygon(const PathInfo *path_info,
522  ExceptionInfo *exception)
523 {
524  long
525  direction,
526  next_direction;
527 
528  PointInfo
529  point,
530  *points;
531 
533  *polygon_info;
534 
536  bounds;
537 
538  ssize_t
539  i,
540  n;
541 
542  MagickBooleanType
543  ghostline;
544 
545  size_t
546  edge,
547  number_edges,
548  number_points;
549 
550  /*
551  Convert a path to the more efficient sorted rendering form.
552  */
553  polygon_info=(PolygonInfo *) AcquireMagickMemory(sizeof(*polygon_info));
554  if (polygon_info == (PolygonInfo *) NULL)
555  {
556  (void) ThrowMagickException(exception,GetMagickModule(),
557  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
558  return((PolygonInfo *) NULL);
559  }
560  number_edges=16;
561  polygon_info->edges=(EdgeInfo *) AcquireQuantumMemory(number_edges,
562  sizeof(*polygon_info->edges));
563  if (polygon_info->edges == (EdgeInfo *) NULL)
564  {
565  (void) ThrowMagickException(exception,GetMagickModule(),
566  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
567  return(DestroyPolygonInfo(polygon_info));
568  }
569  (void) memset(polygon_info->edges,0,number_edges*
570  sizeof(*polygon_info->edges));
571  direction=0;
572  edge=0;
573  ghostline=MagickFalse;
574  n=0;
575  number_points=0;
576  points=(PointInfo *) NULL;
577  (void) memset(&point,0,sizeof(point));
578  (void) memset(&bounds,0,sizeof(bounds));
579  polygon_info->edges[edge].number_points=(size_t) n;
580  polygon_info->edges[edge].scanline=0.0;
581  polygon_info->edges[edge].highwater=0;
582  polygon_info->edges[edge].ghostline=ghostline;
583  polygon_info->edges[edge].direction=(ssize_t) direction;
584  polygon_info->edges[edge].points=points;
585  polygon_info->edges[edge].bounds=bounds;
586  polygon_info->number_edges=0;
587  for (i=0; path_info[i].code != EndCode; i++)
588  {
589  if ((path_info[i].code == MoveToCode) || (path_info[i].code == OpenCode) ||
590  (path_info[i].code == GhostlineCode))
591  {
592  /*
593  Move to.
594  */
595  if ((points != (PointInfo *) NULL) && (n >= 2))
596  {
597  if (edge == number_edges)
598  {
599  number_edges<<=1;
600  polygon_info->edges=(EdgeInfo *) ResizeQuantumMemory(
601  polygon_info->edges,(size_t) number_edges,
602  sizeof(*polygon_info->edges));
603  if (polygon_info->edges == (EdgeInfo *) NULL)
604  {
605  (void) ThrowMagickException(exception,GetMagickModule(),
606  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
607  points=(PointInfo *) RelinquishMagickMemory(points);
608  return(DestroyPolygonInfo(polygon_info));
609  }
610  }
611  polygon_info->edges[edge].number_points=(size_t) n;
612  polygon_info->edges[edge].scanline=(-1.0);
613  polygon_info->edges[edge].highwater=0;
614  polygon_info->edges[edge].ghostline=ghostline;
615  polygon_info->edges[edge].direction=(ssize_t) (direction > 0);
616  if (direction < 0)
617  ReversePoints(points,(size_t) n);
618  polygon_info->edges[edge].points=points;
619  polygon_info->edges[edge].bounds=bounds;
620  polygon_info->edges[edge].bounds.y1=points[0].y;
621  polygon_info->edges[edge].bounds.y2=points[n-1].y;
622  points=(PointInfo *) NULL;
623  ghostline=MagickFalse;
624  edge++;
625  polygon_info->number_edges=edge;
626  }
627  if (points == (PointInfo *) NULL)
628  {
629  number_points=16;
630  points=(PointInfo *) AcquireQuantumMemory((size_t) number_points,
631  sizeof(*points));
632  if (points == (PointInfo *) NULL)
633  {
634  (void) ThrowMagickException(exception,GetMagickModule(),
635  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
636  return(DestroyPolygonInfo(polygon_info));
637  }
638  }
639  ghostline=path_info[i].code == GhostlineCode ? MagickTrue : MagickFalse;
640  point=path_info[i].point;
641  points[0]=point;
642  bounds.x1=point.x;
643  bounds.x2=point.x;
644  direction=0;
645  n=1;
646  continue;
647  }
648  /*
649  Line to.
650  */
651  next_direction=((path_info[i].point.y > point.y) ||
652  ((fabs(path_info[i].point.y-point.y) < MagickEpsilon) &&
653  (path_info[i].point.x > point.x))) ? 1 : -1;
654  if ((points != (PointInfo *) NULL) && (direction != 0) &&
655  (direction != next_direction))
656  {
657  /*
658  New edge.
659  */
660  point=points[n-1];
661  if (edge == number_edges)
662  {
663  number_edges<<=1;
664  polygon_info->edges=(EdgeInfo *) ResizeQuantumMemory(
665  polygon_info->edges,(size_t) number_edges,
666  sizeof(*polygon_info->edges));
667  if (polygon_info->edges == (EdgeInfo *) NULL)
668  {
669  (void) ThrowMagickException(exception,GetMagickModule(),
670  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
671  points=(PointInfo *) RelinquishMagickMemory(points);
672  return(DestroyPolygonInfo(polygon_info));
673  }
674  }
675  polygon_info->edges[edge].number_points=(size_t) n;
676  polygon_info->edges[edge].scanline=(-1.0);
677  polygon_info->edges[edge].highwater=0;
678  polygon_info->edges[edge].ghostline=ghostline;
679  polygon_info->edges[edge].direction=(ssize_t) (direction > 0);
680  if (direction < 0)
681  ReversePoints(points,(size_t) n);
682  polygon_info->edges[edge].points=points;
683  polygon_info->edges[edge].bounds=bounds;
684  polygon_info->edges[edge].bounds.y1=points[0].y;
685  polygon_info->edges[edge].bounds.y2=points[n-1].y;
686  polygon_info->number_edges=edge+1;
687  points=(PointInfo *) NULL;
688  number_points=16;
689  points=(PointInfo *) AcquireQuantumMemory((size_t) number_points,
690  sizeof(*points));
691  if (points == (PointInfo *) NULL)
692  {
693  (void) ThrowMagickException(exception,GetMagickModule(),
694  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
695  return(DestroyPolygonInfo(polygon_info));
696  }
697  n=1;
698  ghostline=MagickFalse;
699  points[0]=point;
700  bounds.x1=point.x;
701  bounds.x2=point.x;
702  edge++;
703  }
704  direction=next_direction;
705  if (points == (PointInfo *) NULL)
706  continue;
707  if (n == (ssize_t) number_points)
708  {
709  number_points<<=1;
710  points=(PointInfo *) ResizeQuantumMemory(points,(size_t) number_points,
711  sizeof(*points));
712  if (points == (PointInfo *) NULL)
713  {
714  (void) ThrowMagickException(exception,GetMagickModule(),
715  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
716  return(DestroyPolygonInfo(polygon_info));
717  }
718  }
719  point=path_info[i].point;
720  points[n]=point;
721  if (point.x < bounds.x1)
722  bounds.x1=point.x;
723  if (point.x > bounds.x2)
724  bounds.x2=point.x;
725  n++;
726  }
727  if (points != (PointInfo *) NULL)
728  {
729  if (n < 2)
730  points=(PointInfo *) RelinquishMagickMemory(points);
731  else
732  {
733  if (edge == number_edges)
734  {
735  number_edges<<=1;
736  polygon_info->edges=(EdgeInfo *) ResizeQuantumMemory(
737  polygon_info->edges,(size_t) number_edges,
738  sizeof(*polygon_info->edges));
739  if (polygon_info->edges == (EdgeInfo *) NULL)
740  {
741  (void) ThrowMagickException(exception,GetMagickModule(),
742  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
743  return(DestroyPolygonInfo(polygon_info));
744  }
745  }
746  polygon_info->edges[edge].number_points=(size_t) n;
747  polygon_info->edges[edge].scanline=(-1.0);
748  polygon_info->edges[edge].highwater=0;
749  polygon_info->edges[edge].ghostline=ghostline;
750  polygon_info->edges[edge].direction=(ssize_t) (direction > 0);
751  if (direction < 0)
752  ReversePoints(points,(size_t) n);
753  polygon_info->edges[edge].points=points;
754  polygon_info->edges[edge].bounds=bounds;
755  polygon_info->edges[edge].bounds.y1=points[0].y;
756  polygon_info->edges[edge].bounds.y2=points[n-1].y;
757  points=(PointInfo *) NULL;
758  ghostline=MagickFalse;
759  edge++;
760  polygon_info->number_edges=edge;
761  }
762  }
763  polygon_info->number_edges=edge;
764  polygon_info->edges=(EdgeInfo *) ResizeQuantumMemory(polygon_info->edges,
765  polygon_info->number_edges,sizeof(*polygon_info->edges));
766  if (polygon_info->edges == (EdgeInfo *) NULL)
767  {
768  (void) ThrowMagickException(exception,GetMagickModule(),
769  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
770  return(DestroyPolygonInfo(polygon_info));
771  }
772  for (i=0; i < (ssize_t) polygon_info->number_edges; i++)
773  {
774  EdgeInfo
775  *edge_info;
776 
777  edge_info=polygon_info->edges+i;
778  edge_info->points=(PointInfo *) ResizeQuantumMemory(edge_info->points,
779  edge_info->number_points,sizeof(*edge_info->points));
780  if (edge_info->points == (PointInfo *) NULL)
781  {
782  (void) ThrowMagickException(exception,GetMagickModule(),
783  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
784  return(DestroyPolygonInfo(polygon_info));
785  }
786  }
787  qsort(polygon_info->edges,(size_t) polygon_info->number_edges,
788  sizeof(*polygon_info->edges),DrawCompareEdges);
789  if ((GetLogEventMask() & DrawEvent) != 0)
790  LogPolygonInfo(polygon_info);
791  return(polygon_info);
792 }
793 
794 /*
795 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
796 % %
797 % %
798 % %
799 + C o n v e r t P r i m i t i v e T o P a t h %
800 % %
801 % %
802 % %
803 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
804 %
805 % ConvertPrimitiveToPath() converts a PrimitiveInfo structure into a vector
806 % path structure.
807 %
808 % The format of the ConvertPrimitiveToPath method is:
809 %
810 % PathInfo *ConvertPrimitiveToPath(const DrawInfo *draw_info,
811 % const PrimitiveInfo *primitive_info,ExceptionInfo *exception)
812 %
813 % A description of each parameter follows:
814 %
815 % o ConvertPrimitiveToPath() returns a vector path structure of type
816 % PathInfo.
817 %
818 % o draw_info: a structure of type DrawInfo.
819 %
820 % o primitive_info: Specifies a pointer to an PrimitiveInfo structure.
821 %
822 %
823 */
824 
825 static void LogPathInfo(const PathInfo *path_info)
826 {
827  const PathInfo
828  *p;
829 
830  (void) LogMagickEvent(DrawEvent,GetMagickModule()," begin vector-path");
831  for (p=path_info; p->code != EndCode; p++)
832  (void) LogMagickEvent(DrawEvent,GetMagickModule(),
833  " %g,%g %s",p->point.x,p->point.y,p->code == GhostlineCode ?
834  "moveto ghostline" : p->code == OpenCode ? "moveto open" :
835  p->code == MoveToCode ? "moveto" : p->code == LineToCode ? "lineto" :
836  "?");
837  (void) LogMagickEvent(DrawEvent,GetMagickModule()," end vector-path");
838 }
839 
840 static PathInfo *ConvertPrimitiveToPath(
841  const DrawInfo *magick_unused(draw_info),const PrimitiveInfo *primitive_info,
842  ExceptionInfo *exception)
843 {
844  MagickBooleanType
845  closed_subpath;
846 
847  PathInfo
848  *path_info;
849 
850  PathInfoCode
851  code;
852 
853  PointInfo
854  p,
855  q;
856 
857  ssize_t
858  i,
859  n;
860 
861  ssize_t
862  coordinates,
863  start;
864 
865  magick_unreferenced(draw_info);
866 
867  /*
868  Converts a PrimitiveInfo structure into a vector path structure.
869  */
870  switch (primitive_info->primitive)
871  {
872  case PointPrimitive:
873  case ColorPrimitive:
874  case MattePrimitive:
875  case TextPrimitive:
876  case ImagePrimitive:
877  return((PathInfo *) NULL);
878  default:
879  break;
880  }
881  for (i=0; primitive_info[i].primitive != UndefinedPrimitive; i++) ;
882  path_info=(PathInfo *) AcquireQuantumMemory((size_t) (3UL*i+1UL),
883  sizeof(*path_info));
884  if (path_info == (PathInfo *) NULL)
885  {
886  (void) ThrowMagickException(exception,GetMagickModule(),
887  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
888  return((PathInfo *) NULL);
889  }
890  coordinates=0;
891  closed_subpath=MagickFalse;
892  n=0;
893  p.x=(-1.0);
894  p.y=(-1.0);
895  q.x=(-1.0);
896  q.y=(-1.0);
897  start=0;
898  for (i=0; primitive_info[i].primitive != UndefinedPrimitive; i++)
899  {
900  code=LineToCode;
901  if (coordinates <= 0)
902  {
903  /*
904  New subpath.
905  */
906  coordinates=(ssize_t) primitive_info[i].coordinates;
907  p=primitive_info[i].point;
908  start=n;
909  code=MoveToCode;
910  closed_subpath=primitive_info[i].closed_subpath;
911  }
912  coordinates--;
913  if ((code == MoveToCode) || (coordinates <= 0) ||
914  (fabs(q.x-primitive_info[i].point.x) >= MagickEpsilon) ||
915  (fabs(q.y-primitive_info[i].point.y) >= MagickEpsilon))
916  {
917  /*
918  Eliminate duplicate points.
919  */
920  path_info[n].code=code;
921  path_info[n].point=primitive_info[i].point;
922  q=primitive_info[i].point;
923  n++;
924  }
925  if (coordinates > 0)
926  continue; /* next point in current subpath */
927  if (closed_subpath != MagickFalse)
928  {
929  closed_subpath=MagickFalse;
930  continue;
931  }
932  /*
933  Mark the p point as open if the subpath is not closed.
934  */
935  path_info[start].code=OpenCode;
936  path_info[n].code=GhostlineCode;
937  path_info[n].point=primitive_info[i].point;
938  n++;
939  path_info[n].code=LineToCode;
940  path_info[n].point=p;
941  n++;
942  }
943  path_info[n].code=EndCode;
944  path_info[n].point.x=0.0;
945  path_info[n].point.y=0.0;
946  if (IsEventLogging() != MagickFalse)
947  LogPathInfo(path_info);
948  path_info=(PathInfo *) ResizeQuantumMemory(path_info,(size_t) (n+1),
949  sizeof(*path_info));
950  return(path_info);
951 }
952 
953 /*
954 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
955 % %
956 % %
957 % %
958 % D e s t r o y D r a w I n f o %
959 % %
960 % %
961 % %
962 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
963 %
964 % DestroyDrawInfo() deallocates memory associated with an DrawInfo structure.
965 %
966 % The format of the DestroyDrawInfo method is:
967 %
968 % DrawInfo *DestroyDrawInfo(DrawInfo *draw_info)
969 %
970 % A description of each parameter follows:
971 %
972 % o draw_info: the draw info.
973 %
974 */
975 MagickExport DrawInfo *DestroyDrawInfo(DrawInfo *draw_info)
976 {
977  assert(draw_info != (DrawInfo *) NULL);
978  assert(draw_info->signature == MagickCoreSignature);
979  if (IsEventLogging() != MagickFalse)
980  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
981  if (draw_info->id != (char *) NULL)
982  draw_info->id=DestroyString(draw_info->id);
983  if (draw_info->primitive != (char *) NULL)
984  draw_info->primitive=DestroyString(draw_info->primitive);
985  if (draw_info->text != (char *) NULL)
986  draw_info->text=DestroyString(draw_info->text);
987  if (draw_info->geometry != (char *) NULL)
988  draw_info->geometry=DestroyString(draw_info->geometry);
989  if (draw_info->tile != (Image *) NULL)
990  draw_info->tile=DestroyImage(draw_info->tile);
991  if (draw_info->fill_pattern != (Image *) NULL)
992  draw_info->fill_pattern=DestroyImage(draw_info->fill_pattern);
993  if (draw_info->stroke_pattern != (Image *) NULL)
994  draw_info->stroke_pattern=DestroyImage(draw_info->stroke_pattern);
995  if (draw_info->font != (char *) NULL)
996  draw_info->font=DestroyString(draw_info->font);
997  if (draw_info->metrics != (char *) NULL)
998  draw_info->metrics=DestroyString(draw_info->metrics);
999  if (draw_info->family != (char *) NULL)
1000  draw_info->family=DestroyString(draw_info->family);
1001  if (draw_info->encoding != (char *) NULL)
1002  draw_info->encoding=DestroyString(draw_info->encoding);
1003  if (draw_info->density != (char *) NULL)
1004  draw_info->density=DestroyString(draw_info->density);
1005  if (draw_info->server_name != (char *) NULL)
1006  draw_info->server_name=(char *)
1007  RelinquishMagickMemory(draw_info->server_name);
1008  if (draw_info->dash_pattern != (double *) NULL)
1009  draw_info->dash_pattern=(double *) RelinquishMagickMemory(
1010  draw_info->dash_pattern);
1011  if (draw_info->gradient.stops != (StopInfo *) NULL)
1012  draw_info->gradient.stops=(StopInfo *) RelinquishMagickMemory(
1013  draw_info->gradient.stops);
1014  if (draw_info->clip_mask != (char *) NULL)
1015  draw_info->clip_mask=DestroyString(draw_info->clip_mask);
1016  if (draw_info->clipping_mask != (Image *) NULL)
1017  draw_info->clipping_mask=DestroyImage(draw_info->clipping_mask);
1018  if (draw_info->composite_mask != (Image *) NULL)
1019  draw_info->composite_mask=DestroyImage(draw_info->composite_mask);
1020  if (draw_info->image_info != (ImageInfo *) NULL)
1021  draw_info->image_info=DestroyImageInfo(draw_info->image_info);
1022  draw_info->signature=(~MagickCoreSignature);
1023  draw_info=(DrawInfo *) RelinquishMagickMemory(draw_info);
1024  return(draw_info);
1025 }
1026 
1027 /*
1028 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1029 % %
1030 % %
1031 % %
1032 % D r a w A f f i n e I m a g e %
1033 % %
1034 % %
1035 % %
1036 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1037 %
1038 % DrawAffineImage() composites the source over the destination image as
1039 % dictated by the affine transform.
1040 %
1041 % The format of the DrawAffineImage method is:
1042 %
1043 % MagickBooleanType DrawAffineImage(Image *image,const Image *source,
1044 % const AffineMatrix *affine)
1045 %
1046 % A description of each parameter follows:
1047 %
1048 % o image: the image.
1049 %
1050 % o source: the source image.
1051 %
1052 % o affine: the affine transform.
1053 %
1054 */
1055 
1056 static SegmentInfo AffineEdge(const Image *image,const AffineMatrix *affine,
1057  const double y,const SegmentInfo *edge)
1058 {
1059  double
1060  intercept,
1061  z;
1062 
1063  double
1064  x;
1065 
1066  SegmentInfo
1067  inverse_edge;
1068 
1069  /*
1070  Determine left and right edges.
1071  */
1072  inverse_edge.x1=edge->x1;
1073  inverse_edge.y1=edge->y1;
1074  inverse_edge.x2=edge->x2;
1075  inverse_edge.y2=edge->y2;
1076  z=affine->ry*y+affine->tx;
1077  if (affine->sx >= MagickEpsilon)
1078  {
1079  intercept=(-z/affine->sx);
1080  x=intercept;
1081  if (x > inverse_edge.x1)
1082  inverse_edge.x1=x;
1083  intercept=(-z+(double) image->columns)/affine->sx;
1084  x=intercept;
1085  if (x < inverse_edge.x2)
1086  inverse_edge.x2=x;
1087  }
1088  else
1089  if (affine->sx < -MagickEpsilon)
1090  {
1091  intercept=(-z+(double) image->columns)/affine->sx;
1092  x=intercept;
1093  if (x > inverse_edge.x1)
1094  inverse_edge.x1=x;
1095  intercept=(-z/affine->sx);
1096  x=intercept;
1097  if (x < inverse_edge.x2)
1098  inverse_edge.x2=x;
1099  }
1100  else
1101  if ((z < 0.0) || ((size_t) floor(z+0.5) >= image->columns))
1102  {
1103  inverse_edge.x2=edge->x1;
1104  return(inverse_edge);
1105  }
1106  /*
1107  Determine top and bottom edges.
1108  */
1109  z=affine->sy*y+affine->ty;
1110  if (affine->rx >= MagickEpsilon)
1111  {
1112  intercept=(-z/affine->rx);
1113  x=intercept;
1114  if (x > inverse_edge.x1)
1115  inverse_edge.x1=x;
1116  intercept=(-z+(double) image->rows)/affine->rx;
1117  x=intercept;
1118  if (x < inverse_edge.x2)
1119  inverse_edge.x2=x;
1120  }
1121  else
1122  if (affine->rx < -MagickEpsilon)
1123  {
1124  intercept=(-z+(double) image->rows)/affine->rx;
1125  x=intercept;
1126  if (x > inverse_edge.x1)
1127  inverse_edge.x1=x;
1128  intercept=(-z/affine->rx);
1129  x=intercept;
1130  if (x < inverse_edge.x2)
1131  inverse_edge.x2=x;
1132  }
1133  else
1134  if ((z < 0.0) || ((size_t) floor(z+0.5) >= image->rows))
1135  {
1136  inverse_edge.x2=edge->x2;
1137  return(inverse_edge);
1138  }
1139  return(inverse_edge);
1140 }
1141 
1142 static AffineMatrix InverseAffineMatrix(const AffineMatrix *affine)
1143 {
1144  AffineMatrix
1145  inverse_affine;
1146 
1147  double
1148  determinant;
1149 
1150  determinant=PerceptibleReciprocal(affine->sx*affine->sy-affine->rx*
1151  affine->ry);
1152  inverse_affine.sx=determinant*affine->sy;
1153  inverse_affine.rx=determinant*(-affine->rx);
1154  inverse_affine.ry=determinant*(-affine->ry);
1155  inverse_affine.sy=determinant*affine->sx;
1156  inverse_affine.tx=(-affine->tx)*inverse_affine.sx-affine->ty*
1157  inverse_affine.ry;
1158  inverse_affine.ty=(-affine->tx)*inverse_affine.rx-affine->ty*
1159  inverse_affine.sy;
1160  return(inverse_affine);
1161 }
1162 
1163 MagickExport MagickBooleanType DrawAffineImage(Image *image,
1164  const Image *source,const AffineMatrix *affine)
1165 {
1166  AffineMatrix
1167  inverse_affine;
1168 
1169  CacheView
1170  *image_view,
1171  *source_view;
1172 
1174  *exception;
1175 
1176  MagickBooleanType
1177  status;
1178 
1180  zero;
1181 
1182  PointInfo
1183  extent[4],
1184  min,
1185  max,
1186  point;
1187 
1188  ssize_t
1189  i;
1190 
1191  SegmentInfo
1192  edge;
1193 
1194  ssize_t
1195  start,
1196  stop,
1197  y;
1198 
1199  /*
1200  Determine bounding box.
1201  */
1202  assert(image != (Image *) NULL);
1203  assert(image->signature == MagickCoreSignature);
1204  assert(source != (const Image *) NULL);
1205  assert(source->signature == MagickCoreSignature);
1206  if (IsEventLogging() != MagickFalse)
1207  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
1208  assert(affine != (AffineMatrix *) NULL);
1209  extent[0].x=0.0;
1210  extent[0].y=0.0;
1211  extent[1].x=(double) source->columns;
1212  extent[1].y=0.0;
1213  extent[2].x=(double) source->columns;
1214  extent[2].y=(double) source->rows;
1215  extent[3].x=0.0;
1216  extent[3].y=(double) source->rows;
1217  for (i=0; i < 4; i++)
1218  {
1219  point=extent[i];
1220  extent[i].x=point.x*affine->sx+point.y*affine->ry+affine->tx;
1221  extent[i].y=point.x*affine->rx+point.y*affine->sy+affine->ty;
1222  }
1223  min=extent[0];
1224  max=extent[0];
1225  for (i=1; i < 4; i++)
1226  {
1227  if (min.x > extent[i].x)
1228  min.x=extent[i].x;
1229  if (min.y > extent[i].y)
1230  min.y=extent[i].y;
1231  if (max.x < extent[i].x)
1232  max.x=extent[i].x;
1233  if (max.y < extent[i].y)
1234  max.y=extent[i].y;
1235  }
1236  /*
1237  Affine transform image.
1238  */
1239  if (SetImageStorageClass(image,DirectClass) == MagickFalse)
1240  return(MagickFalse);
1241  status=MagickTrue;
1242  edge.x1=min.x;
1243  edge.y1=min.y;
1244  edge.x2=max.x;
1245  edge.y2=max.y;
1246  inverse_affine=InverseAffineMatrix(affine);
1247  if (edge.y1 < 0.0)
1248  edge.y1=0.0;
1249  if (edge.y2 > (image->rows-1.0))
1250  edge.y2=image->rows-1.0;
1251  GetMagickPixelPacket(image,&zero);
1252  exception=(&image->exception);
1253  start=CastDoubleToLong(ceil(edge.y1-0.5));
1254  stop=CastDoubleToLong(floor(edge.y2+0.5));
1255  source_view=AcquireVirtualCacheView(source,exception);
1256  image_view=AcquireAuthenticCacheView(image,exception);
1257 #if defined(MAGICKCORE_OPENMP_SUPPORT)
1258  #pragma omp parallel for schedule(static) shared(status) \
1259  magick_number_threads(source,image,stop-start,1)
1260 #endif
1261  for (y=start; y <= stop; y++)
1262  {
1263  IndexPacket
1264  *magick_restrict indexes;
1265 
1267  composite,
1268  pixel;
1269 
1270  PointInfo
1271  point;
1272 
1273  PixelPacket
1274  *magick_restrict q;
1275 
1276  SegmentInfo
1277  inverse_edge;
1278 
1279  ssize_t
1280  x,
1281  x_offset;
1282 
1283  if (status == MagickFalse)
1284  continue;
1285  inverse_edge=AffineEdge(source,&inverse_affine,(double) y,&edge);
1286  if (inverse_edge.x2 < inverse_edge.x1)
1287  continue;
1288  if (inverse_edge.x1 < 0.0)
1289  inverse_edge.x1=0.0;
1290  if (inverse_edge.x2 > image->columns-1.0)
1291  inverse_edge.x2=image->columns-1.0;
1292  q=GetCacheViewAuthenticPixels(image_view,CastDoubleToLong(
1293  ceil(inverse_edge.x1-0.5)),y,(size_t) CastDoubleToLong(floor(
1294  inverse_edge.x2+0.5)-ceil(inverse_edge.x1-0.5)+1),1,exception);
1295  if (q == (PixelPacket *) NULL)
1296  continue;
1297  indexes=GetCacheViewAuthenticIndexQueue(image_view);
1298  pixel=zero;
1299  composite=zero;
1300  x_offset=0;
1301  for (x=CastDoubleToLong(ceil(inverse_edge.x1-0.5));
1302  x <= CastDoubleToLong(floor(inverse_edge.x2+0.5)); x++)
1303  {
1304  point.x=(double) x*inverse_affine.sx+y*inverse_affine.ry+
1305  inverse_affine.tx;
1306  point.y=(double) x*inverse_affine.rx+y*inverse_affine.sy+
1307  inverse_affine.ty;
1308  status=InterpolateMagickPixelPacket(source,source_view,
1309  UndefinedInterpolatePixel,point.x,point.y,&pixel,exception);
1310  if (status == MagickFalse)
1311  break;
1312  SetMagickPixelPacket(image,q,indexes+x_offset,&composite);
1313  MagickPixelCompositeOver(&pixel,pixel.opacity,&composite,
1314  composite.opacity,&composite);
1315  SetPixelPacket(image,&composite,q,indexes+x_offset);
1316  x_offset++;
1317  q++;
1318  }
1319  if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse)
1320  status=MagickFalse;
1321  }
1322  source_view=DestroyCacheView(source_view);
1323  image_view=DestroyCacheView(image_view);
1324  return(status);
1325 }
1326 
1327 /*
1328 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1329 % %
1330 % %
1331 % %
1332 + D r a w B o u n d i n g R e c t a n g l e s %
1333 % %
1334 % %
1335 % %
1336 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1337 %
1338 % DrawBoundingRectangles() draws the bounding rectangles on the image. This
1339 % is only useful for developers debugging the rendering algorithm.
1340 %
1341 % The format of the DrawBoundingRectangles method is:
1342 %
1343 % MagickBooleanType DrawBoundingRectangles(Image *image,
1344 % const DrawInfo *draw_info,PolygonInfo *polygon_info)
1345 %
1346 % A description of each parameter follows:
1347 %
1348 % o image: the image.
1349 %
1350 % o draw_info: the draw info.
1351 %
1352 % o polygon_info: Specifies a pointer to a PolygonInfo structure.
1353 %
1354 */
1355 
1356 static MagickBooleanType DrawBoundingRectangles(Image *image,
1357  const DrawInfo *draw_info,const PolygonInfo *polygon_info)
1358 {
1359  double
1360  mid;
1361 
1362  DrawInfo
1363  *clone_info;
1364 
1365  MagickStatusType
1366  status;
1367 
1368  PointInfo
1369  end,
1370  resolution,
1371  start;
1372 
1374  primitive_info[6];
1375 
1376  ssize_t
1377  i;
1378 
1379  SegmentInfo
1380  bounds;
1381 
1382  ssize_t
1383  coordinates;
1384 
1385  (void) memset(primitive_info,0,sizeof(primitive_info));
1386  clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
1387  status=QueryColorDatabase("#0000",&clone_info->fill,&image->exception);
1388  if (status == MagickFalse)
1389  {
1390  clone_info=DestroyDrawInfo(clone_info);
1391  return(MagickFalse);
1392  }
1393  resolution.x=96.0;
1394  resolution.y=96.0;
1395  if (clone_info->density != (char *) NULL)
1396  {
1397  GeometryInfo
1398  geometry_info;
1399 
1400  MagickStatusType
1401  flags;
1402 
1403  flags=ParseGeometry(clone_info->density,&geometry_info);
1404  if ((flags & RhoValue) != 0)
1405  resolution.x=geometry_info.rho;
1406  resolution.y=resolution.x;
1407  if ((flags & SigmaValue) != 0)
1408  resolution.y=geometry_info.sigma;
1409  }
1410  mid=(resolution.x/96.0)*ExpandAffine(&clone_info->affine)*
1411  clone_info->stroke_width/2.0;
1412  bounds.x1=0.0;
1413  bounds.y1=0.0;
1414  bounds.x2=0.0;
1415  bounds.y2=0.0;
1416  if (polygon_info != (PolygonInfo *) NULL)
1417  {
1418  bounds=polygon_info->edges[0].bounds;
1419  for (i=1; i < (ssize_t) polygon_info->number_edges; i++)
1420  {
1421  if (polygon_info->edges[i].bounds.x1 < (double) bounds.x1)
1422  bounds.x1=polygon_info->edges[i].bounds.x1;
1423  if (polygon_info->edges[i].bounds.y1 < (double) bounds.y1)
1424  bounds.y1=polygon_info->edges[i].bounds.y1;
1425  if (polygon_info->edges[i].bounds.x2 > (double) bounds.x2)
1426  bounds.x2=polygon_info->edges[i].bounds.x2;
1427  if (polygon_info->edges[i].bounds.y2 > (double) bounds.y2)
1428  bounds.y2=polygon_info->edges[i].bounds.y2;
1429  }
1430  bounds.x1-=mid;
1431  bounds.x1=bounds.x1 < 0.0 ? 0.0 : bounds.x1 >= (double)
1432  image->columns ? (double) image->columns-1 : bounds.x1;
1433  bounds.y1-=mid;
1434  bounds.y1=bounds.y1 < 0.0 ? 0.0 : bounds.y1 >= (double)
1435  image->rows ? (double) image->rows-1 : bounds.y1;
1436  bounds.x2+=mid;
1437  bounds.x2=bounds.x2 < 0.0 ? 0.0 : bounds.x2 >= (double)
1438  image->columns ? (double) image->columns-1 : bounds.x2;
1439  bounds.y2+=mid;
1440  bounds.y2=bounds.y2 < 0.0 ? 0.0 : bounds.y2 >= (double)
1441  image->rows ? (double) image->rows-1 : bounds.y2;
1442  for (i=0; i < (ssize_t) polygon_info->number_edges; i++)
1443  {
1444  if (polygon_info->edges[i].direction != 0)
1445  status=QueryColorDatabase("#f00",&clone_info->stroke,
1446  &image->exception);
1447  else
1448  status=QueryColorDatabase("#0f0",&clone_info->stroke,
1449  &image->exception);
1450  if (status == MagickFalse)
1451  break;
1452  start.x=(double) (polygon_info->edges[i].bounds.x1-mid);
1453  start.y=(double) (polygon_info->edges[i].bounds.y1-mid);
1454  end.x=(double) (polygon_info->edges[i].bounds.x2+mid);
1455  end.y=(double) (polygon_info->edges[i].bounds.y2+mid);
1456  primitive_info[0].primitive=RectanglePrimitive;
1457  status&=TraceRectangle(primitive_info,start,end);
1458  primitive_info[0].method=ReplaceMethod;
1459  coordinates=(ssize_t) primitive_info[0].coordinates;
1460  primitive_info[coordinates].primitive=UndefinedPrimitive;
1461  status=DrawPrimitive(image,clone_info,primitive_info);
1462  if (status == MagickFalse)
1463  break;
1464  }
1465  if (i < (ssize_t) polygon_info->number_edges)
1466  {
1467  clone_info=DestroyDrawInfo(clone_info);
1468  return(status == 0 ? MagickFalse : MagickTrue);
1469  }
1470  }
1471  status=QueryColorDatabase("#00f",&clone_info->stroke,&image->exception);
1472  if (status == MagickFalse)
1473  {
1474  clone_info=DestroyDrawInfo(clone_info);
1475  return(MagickFalse);
1476  }
1477  start.x=(double) (bounds.x1-mid);
1478  start.y=(double) (bounds.y1-mid);
1479  end.x=(double) (bounds.x2+mid);
1480  end.y=(double) (bounds.y2+mid);
1481  primitive_info[0].primitive=RectanglePrimitive;
1482  status&=TraceRectangle(primitive_info,start,end);
1483  primitive_info[0].method=ReplaceMethod;
1484  coordinates=(ssize_t) primitive_info[0].coordinates;
1485  primitive_info[coordinates].primitive=UndefinedPrimitive;
1486  status=DrawPrimitive(image,clone_info,primitive_info);
1487  clone_info=DestroyDrawInfo(clone_info);
1488  return(status == 0 ? MagickFalse : MagickTrue);
1489 }
1490 
1491 /*
1492 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1493 % %
1494 % %
1495 % %
1496 % D r a w C l i p P a t h %
1497 % %
1498 % %
1499 % %
1500 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1501 %
1502 % DrawClipPath() draws the clip path on the image mask.
1503 %
1504 % The format of the DrawClipPath method is:
1505 %
1506 % MagickBooleanType DrawClipPath(Image *image,const DrawInfo *draw_info,
1507 % const char *id)
1508 %
1509 % A description of each parameter follows:
1510 %
1511 % o image: the image.
1512 %
1513 % o draw_info: the draw info.
1514 %
1515 % o id: the clip path id.
1516 %
1517 */
1518 MagickExport MagickBooleanType DrawClipPath(Image *image,
1519  const DrawInfo *draw_info,const char *id)
1520 {
1521  const char
1522  *clip_path;
1523 
1524  Image
1525  *clipping_mask;
1526 
1527  MagickBooleanType
1528  status;
1529 
1530  clip_path=GetImageArtifact(image,id);
1531  if (clip_path == (const char *) NULL)
1532  return(MagickFalse);
1533  clipping_mask=DrawClippingMask(image,draw_info,draw_info->clip_mask,clip_path,
1534  &image->exception);
1535  if (clipping_mask == (Image *) NULL)
1536  return(MagickFalse);
1537  status=SetImageClipMask(image,clipping_mask);
1538  clipping_mask=DestroyImage(clipping_mask);
1539  return(status);
1540 }
1541 
1542 /*
1543 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1544 % %
1545 % %
1546 % %
1547 % D r a w C l i p p i n g M a s k %
1548 % %
1549 % %
1550 % %
1551 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1552 %
1553 % DrawClippingMask() draws the clip path and returns it as an image clipping
1554 % mask.
1555 %
1556 % The format of the DrawClippingMask method is:
1557 %
1558 % Image *DrawClippingMask(Image *image,const DrawInfo *draw_info,
1559 % const char *id,const char *clip_path,ExceptionInfo *exception)
1560 %
1561 % A description of each parameter follows:
1562 %
1563 % o image: the image.
1564 %
1565 % o draw_info: the draw info.
1566 %
1567 % o id: the clip path id.
1568 %
1569 % o clip_path: the clip path.
1570 %
1571 % o exception: return any errors or warnings in this structure.
1572 %
1573 */
1574 static Image *DrawClippingMask(Image *image,const DrawInfo *draw_info,
1575  const char *id,const char *clip_path,ExceptionInfo *exception)
1576 {
1577  DrawInfo
1578  *clone_info;
1579 
1580  Image
1581  *clip_mask;
1582 
1583  MagickStatusType
1584  status;
1585 
1586  /*
1587  Draw a clip path.
1588  */
1589  assert(image != (Image *) NULL);
1590  assert(image->signature == MagickCoreSignature);
1591  assert(draw_info != (const DrawInfo *) NULL);
1592  if (IsEventLogging() != MagickFalse)
1593  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
1594  clip_mask=AcquireImage((const ImageInfo *) NULL);
1595  status=SetImageExtent(clip_mask,image->columns,image->rows);
1596  if (status == MagickFalse)
1597  return(DestroyImage(clip_mask));
1598  status=SetImageClipMask(image,(Image *) NULL);
1599  status=QueryColorCompliance("#0000",AllCompliance,
1600  &clip_mask->background_color,exception);
1601  clip_mask->background_color.opacity=(Quantum) TransparentOpacity;
1602  status=SetImageBackgroundColor(clip_mask);
1603  if (draw_info->debug != MagickFalse)
1604  (void) LogMagickEvent(DrawEvent,GetMagickModule(),"\nbegin clip-path %s",
1605  id);
1606  clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
1607  (void) CloneString(&clone_info->primitive,clip_path);
1608  status=QueryColorCompliance("#ffffff",AllCompliance,&clone_info->fill,
1609  exception);
1610  if (clone_info->clip_mask != (char *) NULL)
1611  clone_info->clip_mask=DestroyString(clone_info->clip_mask);
1612  (void) QueryColorCompliance("#00000000",AllCompliance,&clone_info->stroke,
1613  exception);
1614  clone_info->stroke_width=0.0;
1615  clone_info->opacity=OpaqueOpacity;
1616  clone_info->clip_path=MagickTrue;
1617  status=RenderMVGContent(clip_mask,clone_info,0);
1618  clone_info=DestroyDrawInfo(clone_info);
1619  status&=SeparateImageChannel(clip_mask,TrueAlphaChannel);
1620  if (draw_info->compliance != SVGCompliance)
1621  status&=NegateImage(clip_mask,MagickFalse);
1622  if (status == MagickFalse)
1623  clip_mask=DestroyImage(clip_mask);
1624  if (draw_info->debug != MagickFalse)
1625  (void) LogMagickEvent(DrawEvent,GetMagickModule(),"end clip-path");
1626  return(clip_mask);
1627 }
1628 
1629 /*
1630 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1631 % %
1632 % %
1633 % %
1634 % D r a w C o m p o s i t e M a s k %
1635 % %
1636 % %
1637 % %
1638 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1639 %
1640 % DrawCompositeMask() draws the mask path and returns it as an image mask.
1641 %
1642 % The format of the DrawCompositeMask method is:
1643 %
1644 % Image *DrawCompositeMask(Image *image,const DrawInfo *draw_info,
1645 % const char *id,const char *mask_path,ExceptionInfo *exception)
1646 %
1647 % A description of each parameter follows:
1648 %
1649 % o image: the image.
1650 %
1651 % o draw_info: the draw info.
1652 %
1653 % o id: the mask path id.
1654 %
1655 % o mask_path: the mask path.
1656 %
1657 % o exception: return any errors or warnings in this structure.
1658 %
1659 */
1660 static Image *DrawCompositeMask(Image *image,const DrawInfo *draw_info,
1661  const char *id,const char *mask_path,ExceptionInfo *exception)
1662 {
1663  Image
1664  *composite_mask;
1665 
1666  DrawInfo
1667  *clone_info;
1668 
1669  MagickStatusType
1670  status;
1671 
1672  /*
1673  Draw a mask path.
1674  */
1675  assert(image != (Image *) NULL);
1676  assert(image->signature == MagickCoreSignature);
1677  assert(draw_info != (const DrawInfo *) NULL);
1678  if (IsEventLogging() != MagickFalse)
1679  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
1680  composite_mask=AcquireImage((const ImageInfo *) NULL);
1681  status=SetImageExtent(composite_mask,image->columns,image->rows);
1682  if (status == MagickFalse)
1683  return(DestroyImage(composite_mask));
1684  status=SetImageMask(image,(Image *) NULL);
1685  status=QueryColorCompliance("#0000",AllCompliance,
1686  &composite_mask->background_color,exception);
1687  composite_mask->background_color.opacity=(Quantum) TransparentOpacity;
1688  (void) SetImageBackgroundColor(composite_mask);
1689  if (draw_info->debug != MagickFalse)
1690  (void) LogMagickEvent(DrawEvent,GetMagickModule(),"\nbegin mask-path %s",
1691  id);
1692  clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
1693  (void) CloneString(&clone_info->primitive,mask_path);
1694  status=QueryColorCompliance("#ffffff",AllCompliance,&clone_info->fill,
1695  exception);
1696  status=QueryColorCompliance("#00000000",AllCompliance,&clone_info->stroke,
1697  exception);
1698  clone_info->stroke_width=0.0;
1699  clone_info->opacity=OpaqueOpacity;
1700  status=RenderMVGContent(composite_mask,clone_info,0);
1701  clone_info=DestroyDrawInfo(clone_info);
1702  status&=SeparateImageChannel(composite_mask,TrueAlphaChannel);
1703  status&=NegateImage(composite_mask,MagickFalse);
1704  if (status == MagickFalse)
1705  composite_mask=DestroyImage(composite_mask);
1706  if (draw_info->debug != MagickFalse)
1707  (void) LogMagickEvent(DrawEvent,GetMagickModule(),"end mask-path");
1708  return(composite_mask);
1709 }
1710 
1711 /*
1712 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1713 % %
1714 % %
1715 % %
1716 + D r a w D a s h P o l y g o n %
1717 % %
1718 % %
1719 % %
1720 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1721 %
1722 % DrawDashPolygon() draws a dashed polygon (line, rectangle, ellipse) on the
1723 % image while respecting the dash offset and dash pattern attributes.
1724 %
1725 % The format of the DrawDashPolygon method is:
1726 %
1727 % MagickBooleanType DrawDashPolygon(const DrawInfo *draw_info,
1728 % const PrimitiveInfo *primitive_info,Image *image)
1729 %
1730 % A description of each parameter follows:
1731 %
1732 % o draw_info: the draw info.
1733 %
1734 % o primitive_info: Specifies a pointer to a PrimitiveInfo structure.
1735 %
1736 % o image: the image.
1737 %
1738 %
1739 */
1740 static MagickBooleanType DrawDashPolygon(const DrawInfo *draw_info,
1741  const PrimitiveInfo *primitive_info,Image *image)
1742 {
1743  double
1744  dx,
1745  dy,
1746  length,
1747  maximum_length,
1748  offset,
1749  scale,
1750  total_length;
1751 
1752  DrawInfo
1753  *clone_info;
1754 
1755  MagickStatusType
1756  status;
1757 
1759  *dash_polygon;
1760 
1761  ssize_t
1762  i;
1763 
1764  size_t
1765  number_vertices;
1766 
1767  ssize_t
1768  j,
1769  n;
1770 
1771  assert(draw_info != (const DrawInfo *) NULL);
1772  if (draw_info->debug != MagickFalse)
1773  (void) LogMagickEvent(DrawEvent,GetMagickModule()," begin draw-dash");
1774  for (i=0; primitive_info[i].primitive != UndefinedPrimitive; i++) ;
1775  number_vertices=(size_t) i;
1776  dash_polygon=(PrimitiveInfo *) AcquireQuantumMemory((size_t)
1777  (2UL*number_vertices+32UL),sizeof(*dash_polygon));
1778  if (dash_polygon == (PrimitiveInfo *) NULL)
1779  {
1780  (void) ThrowMagickException(&image->exception,GetMagickModule(),
1781  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
1782  return(MagickFalse);
1783  }
1784  (void) memset(dash_polygon,0,(2UL*number_vertices+32UL)*
1785  sizeof(*dash_polygon));
1786  clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
1787  clone_info->miterlimit=0;
1788  dash_polygon[0]=primitive_info[0];
1789  scale=ExpandAffine(&draw_info->affine);
1790  length=scale*draw_info->dash_pattern[0];
1791  offset=fabs(draw_info->dash_offset) >= MagickEpsilon ?
1792  scale*draw_info->dash_offset : 0.0;
1793  j=1;
1794  for (n=0; offset > 0.0; j=0)
1795  {
1796  if (draw_info->dash_pattern[n] <= 0.0)
1797  break;
1798  length=scale*(draw_info->dash_pattern[n]+(n == 0 ? -0.5 : 0.5));
1799  if (offset > length)
1800  {
1801  offset-=length;
1802  n++;
1803  length=scale*draw_info->dash_pattern[n];
1804  continue;
1805  }
1806  if (offset < length)
1807  {
1808  length-=offset;
1809  offset=0.0;
1810  break;
1811  }
1812  offset=0.0;
1813  n++;
1814  }
1815  status=MagickTrue;
1816  maximum_length=0.0;
1817  total_length=0.0;
1818  for (i=1; (i < (ssize_t) number_vertices) && (length >= 0.0); i++)
1819  {
1820  dx=primitive_info[i].point.x-primitive_info[i-1].point.x;
1821  dy=primitive_info[i].point.y-primitive_info[i-1].point.y;
1822  maximum_length=hypot(dx,dy);
1823  if (maximum_length > (double) (MaxBezierCoordinates >> 2))
1824  continue;
1825  if (fabs(length) < MagickEpsilon)
1826  {
1827  if (fabs(draw_info->dash_pattern[n]) >= MagickEpsilon)
1828  n++;
1829  if (fabs(draw_info->dash_pattern[n]) < MagickEpsilon)
1830  n=0;
1831  length=scale*draw_info->dash_pattern[n];
1832  }
1833  for (total_length=0.0; (length >= 0.0) && (maximum_length >= (total_length+length)); )
1834  {
1835  total_length+=length;
1836  if ((n & 0x01) != 0)
1837  {
1838  dash_polygon[0]=primitive_info[0];
1839  dash_polygon[0].point.x=(double) (primitive_info[i-1].point.x+dx*
1840  total_length*PerceptibleReciprocal(maximum_length));
1841  dash_polygon[0].point.y=(double) (primitive_info[i-1].point.y+dy*
1842  total_length*PerceptibleReciprocal(maximum_length));
1843  j=1;
1844  }
1845  else
1846  {
1847  if ((j+1) > (ssize_t) number_vertices)
1848  break;
1849  dash_polygon[j]=primitive_info[i-1];
1850  dash_polygon[j].point.x=(double) (primitive_info[i-1].point.x+dx*
1851  total_length*PerceptibleReciprocal(maximum_length));
1852  dash_polygon[j].point.y=(double) (primitive_info[i-1].point.y+dy*
1853  total_length*PerceptibleReciprocal(maximum_length));
1854  dash_polygon[j].coordinates=1;
1855  j++;
1856  dash_polygon[0].coordinates=(size_t) j;
1857  dash_polygon[j].primitive=UndefinedPrimitive;
1858  status&=DrawStrokePolygon(image,clone_info,dash_polygon);
1859  if (status == MagickFalse)
1860  break;
1861  }
1862  if (fabs(draw_info->dash_pattern[n]) >= MagickEpsilon)
1863  n++;
1864  if (fabs(draw_info->dash_pattern[n]) < MagickEpsilon)
1865  n=0;
1866  length=scale*draw_info->dash_pattern[n];
1867  }
1868  length-=(maximum_length-total_length);
1869  if ((n & 0x01) != 0)
1870  continue;
1871  dash_polygon[j]=primitive_info[i];
1872  dash_polygon[j].coordinates=1;
1873  j++;
1874  }
1875  if ((status != MagickFalse) && (total_length < maximum_length) &&
1876  ((n & 0x01) == 0) && (j > 1))
1877  {
1878  dash_polygon[j]=primitive_info[i-1];
1879  dash_polygon[j].point.x+=MagickEpsilon;
1880  dash_polygon[j].point.y+=MagickEpsilon;
1881  dash_polygon[j].coordinates=1;
1882  j++;
1883  dash_polygon[0].coordinates=(size_t) j;
1884  dash_polygon[j].primitive=UndefinedPrimitive;
1885  status&=DrawStrokePolygon(image,clone_info,dash_polygon);
1886  }
1887  dash_polygon=(PrimitiveInfo *) RelinquishMagickMemory(dash_polygon);
1888  clone_info=DestroyDrawInfo(clone_info);
1889  if (draw_info->debug != MagickFalse)
1890  (void) LogMagickEvent(DrawEvent,GetMagickModule()," end draw-dash");
1891  return(status != 0 ? MagickTrue : MagickFalse);
1892 }
1893 
1894 /*
1895 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1896 % %
1897 % %
1898 % %
1899 % D r a w G r a d i e n t I m a g e %
1900 % %
1901 % %
1902 % %
1903 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1904 %
1905 % DrawGradientImage() draws a linear gradient on the image.
1906 %
1907 % The format of the DrawGradientImage method is:
1908 %
1909 % MagickBooleanType DrawGradientImage(Image *image,
1910 % const DrawInfo *draw_info)
1911 %
1912 % A description of each parameter follows:
1913 %
1914 % o image: the image.
1915 %
1916 % o draw_info: the draw info.
1917 %
1918 */
1919 
1920 static inline double GetStopColorOffset(const GradientInfo *gradient,
1921  const ssize_t x,const ssize_t y)
1922 {
1923  switch (gradient->type)
1924  {
1925  case UndefinedGradient:
1926  case LinearGradient:
1927  {
1928  double
1929  gamma,
1930  length,
1931  offset,
1932  scale;
1933 
1934  PointInfo
1935  p,
1936  q;
1937 
1938  const SegmentInfo
1939  *gradient_vector;
1940 
1941  gradient_vector=(&gradient->gradient_vector);
1942  p.x=gradient_vector->x2-gradient_vector->x1;
1943  p.y=gradient_vector->y2-gradient_vector->y1;
1944  q.x=(double) x-gradient_vector->x1;
1945  q.y=(double) y-gradient_vector->y1;
1946  length=sqrt(q.x*q.x+q.y*q.y);
1947  gamma=sqrt(p.x*p.x+p.y*p.y)*length;
1948  gamma=PerceptibleReciprocal(gamma);
1949  scale=p.x*q.x+p.y*q.y;
1950  offset=gamma*scale*length;
1951  return(offset);
1952  }
1953  case RadialGradient:
1954  {
1955  PointInfo
1956  v;
1957 
1958  if (gradient->spread == RepeatSpread)
1959  {
1960  v.x=(double) x-gradient->center.x;
1961  v.y=(double) y-gradient->center.y;
1962  return(sqrt(v.x*v.x+v.y*v.y));
1963  }
1964  v.x=(double) (((x-gradient->center.x)*cos(DegreesToRadians(
1965  gradient->angle)))+((y-gradient->center.y)*sin(DegreesToRadians(
1966  gradient->angle))))*PerceptibleReciprocal(gradient->radii.x);
1967  v.y=(double) (((x-gradient->center.x)*sin(DegreesToRadians(
1968  gradient->angle)))-((y-gradient->center.y)*cos(DegreesToRadians(
1969  gradient->angle))))*PerceptibleReciprocal(gradient->radii.y);
1970  return(sqrt(v.x*v.x+v.y*v.y));
1971  }
1972  }
1973  return(0.0);
1974 }
1975 
1976 MagickExport MagickBooleanType DrawGradientImage(Image *image,
1977  const DrawInfo *draw_info)
1978 {
1979  CacheView
1980  *image_view;
1981 
1982  const GradientInfo
1983  *gradient;
1984 
1985  const SegmentInfo
1986  *gradient_vector;
1987 
1988  double
1989  length;
1990 
1992  *exception;
1993 
1994  MagickBooleanType
1995  status;
1996 
1998  zero;
1999 
2000  PointInfo
2001  point;
2002 
2004  bounding_box;
2005 
2006  ssize_t
2007  height,
2008  y;
2009 
2010  /*
2011  Draw linear or radial gradient on image.
2012  */
2013  assert(image != (Image *) NULL);
2014  assert(image->signature == MagickCoreSignature);
2015  assert(draw_info != (const DrawInfo *) NULL);
2016  if (IsEventLogging() != MagickFalse)
2017  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
2018  gradient=(&draw_info->gradient);
2019  gradient_vector=(&gradient->gradient_vector);
2020  point.x=gradient_vector->x2-gradient_vector->x1;
2021  point.y=gradient_vector->y2-gradient_vector->y1;
2022  length=sqrt(point.x*point.x+point.y*point.y);
2023  bounding_box=gradient->bounding_box;
2024  status=MagickTrue;
2025  exception=(&image->exception);
2026  GetMagickPixelPacket(image,&zero);
2027  image_view=AcquireAuthenticCacheView(image,exception);
2028  height=(size_t) (bounding_box.y+bounding_box.height);
2029 #if defined(MAGICKCORE_OPENMP_SUPPORT)
2030  #pragma omp parallel for schedule(static) shared(status) \
2031  magick_number_threads(image,image,height,1)
2032 #endif
2033  for (y=bounding_box.y; y < (ssize_t) height; y++)
2034  {
2035  double
2036  alpha,
2037  offset;
2038 
2040  composite,
2041  pixel;
2042 
2043  IndexPacket
2044  *magick_restrict indexes;
2045 
2046  PixelPacket
2047  *magick_restrict q;
2048 
2049  ssize_t
2050  i,
2051  j,
2052  width,
2053  x;
2054 
2055  if (status == MagickFalse)
2056  continue;
2057  q=GetCacheViewAuthenticPixels(image_view,bounding_box.x,y,(size_t)
2058  bounding_box.width,1,exception);
2059  if (q == (PixelPacket *) NULL)
2060  {
2061  status=MagickFalse;
2062  continue;
2063  }
2064  indexes=GetCacheViewAuthenticIndexQueue(image_view);
2065  pixel=zero;
2066  composite=zero;
2067  offset=GetStopColorOffset(gradient,0,y);
2068  if (gradient->type != RadialGradient)
2069  offset*=PerceptibleReciprocal(length);
2070  width=(size_t) (bounding_box.x+bounding_box.width);
2071  for (x=bounding_box.x; x < (ssize_t) width; x++)
2072  {
2073  SetMagickPixelPacket(image,q,indexes+x,&pixel);
2074  switch (gradient->spread)
2075  {
2076  case UndefinedSpread:
2077  case PadSpread:
2078  {
2079  if ((x != CastDoubleToLong(ceil(gradient_vector->x1-0.5))) ||
2080  (y != CastDoubleToLong(ceil(gradient_vector->y1-0.5))))
2081  {
2082  offset=GetStopColorOffset(gradient,x,y);
2083  if (gradient->type != RadialGradient)
2084  offset*=PerceptibleReciprocal(length);
2085  }
2086  for (i=0; i < (ssize_t) gradient->number_stops; i++)
2087  if (offset < gradient->stops[i].offset)
2088  break;
2089  if ((offset < 0.0) || (i == 0))
2090  composite=gradient->stops[0].color;
2091  else
2092  if ((offset > 1.0) || (i == (ssize_t) gradient->number_stops))
2093  composite=gradient->stops[gradient->number_stops-1].color;
2094  else
2095  {
2096  j=i;
2097  i--;
2098  alpha=(offset-gradient->stops[i].offset)/
2099  (gradient->stops[j].offset-gradient->stops[i].offset);
2100  MagickPixelCompositeBlend(&gradient->stops[i].color,1.0-alpha,
2101  &gradient->stops[j].color,alpha,&composite);
2102  }
2103  break;
2104  }
2105  case ReflectSpread:
2106  {
2107  if ((x != CastDoubleToLong(ceil(gradient_vector->x1-0.5))) ||
2108  (y != CastDoubleToLong(ceil(gradient_vector->y1-0.5))))
2109  {
2110  offset=GetStopColorOffset(gradient,x,y);
2111  if (gradient->type != RadialGradient)
2112  offset*=PerceptibleReciprocal(length);
2113  }
2114  if (offset < 0.0)
2115  offset=(-offset);
2116  if ((ssize_t) fmod(offset,2.0) == 0)
2117  offset=fmod(offset,1.0);
2118  else
2119  offset=1.0-fmod(offset,1.0);
2120  for (i=0; i < (ssize_t) gradient->number_stops; i++)
2121  if (offset < gradient->stops[i].offset)
2122  break;
2123  if (i == 0)
2124  composite=gradient->stops[0].color;
2125  else
2126  if (i == (ssize_t) gradient->number_stops)
2127  composite=gradient->stops[gradient->number_stops-1].color;
2128  else
2129  {
2130  j=i;
2131  i--;
2132  alpha=(offset-gradient->stops[i].offset)/
2133  (gradient->stops[j].offset-gradient->stops[i].offset);
2134  MagickPixelCompositeBlend(&gradient->stops[i].color,1.0-alpha,
2135  &gradient->stops[j].color,alpha,&composite);
2136  }
2137  break;
2138  }
2139  case RepeatSpread:
2140  {
2141  double
2142  repeat;
2143 
2144  MagickBooleanType
2145  antialias;
2146 
2147  antialias=MagickFalse;
2148  repeat=0.0;
2149  if ((x != CastDoubleToLong(ceil(gradient_vector->x1-0.5))) ||
2150  (y != CastDoubleToLong(ceil(gradient_vector->y1-0.5))))
2151  {
2152  offset=GetStopColorOffset(gradient,x,y);
2153  if (gradient->type == LinearGradient)
2154  {
2155  repeat=fmod(offset,length);
2156  if (repeat < 0.0)
2157  repeat=length-fmod(-repeat,length);
2158  else
2159  repeat=fmod(offset,length);
2160  antialias=(repeat < length) && ((repeat+1.0) > length) ?
2161  MagickTrue : MagickFalse;
2162  offset=PerceptibleReciprocal(length)*repeat;
2163  }
2164  else
2165  {
2166  repeat=fmod(offset,(double) gradient->radius);
2167  if (repeat < 0.0)
2168  repeat=gradient->radius-fmod(-repeat,
2169  (double) gradient->radius);
2170  else
2171  repeat=fmod(offset,(double) gradient->radius);
2172  antialias=repeat+1.0 > gradient->radius ? MagickTrue :
2173  MagickFalse;
2174  offset=repeat*PerceptibleReciprocal(gradient->radius);
2175  }
2176  }
2177  for (i=0; i < (ssize_t) gradient->number_stops; i++)
2178  if (offset < gradient->stops[i].offset)
2179  break;
2180  if (i == 0)
2181  composite=gradient->stops[0].color;
2182  else
2183  if (i == (ssize_t) gradient->number_stops)
2184  composite=gradient->stops[gradient->number_stops-1].color;
2185  else
2186  {
2187  j=i;
2188  i--;
2189  alpha=(offset-gradient->stops[i].offset)/
2190  (gradient->stops[j].offset-gradient->stops[i].offset);
2191  if (antialias != MagickFalse)
2192  {
2193  if (gradient->type == LinearGradient)
2194  alpha=length-repeat;
2195  else
2196  alpha=gradient->radius-repeat;
2197  i=0;
2198  j=(ssize_t) gradient->number_stops-1L;
2199  }
2200  MagickPixelCompositeBlend(&gradient->stops[i].color,1.0-alpha,
2201  &gradient->stops[j].color,alpha,&composite);
2202  }
2203  break;
2204  }
2205  }
2206  MagickPixelCompositeOver(&composite,composite.opacity,&pixel,
2207  pixel.opacity,&pixel);
2208  SetPixelPacket(image,&pixel,q,indexes+x);
2209  q++;
2210  }
2211  if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse)
2212  status=MagickFalse;
2213  }
2214  image_view=DestroyCacheView(image_view);
2215  return(status);
2216 }
2217 
2218 /*
2219 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2220 % %
2221 % %
2222 % %
2223 % D r a w I m a g e %
2224 % %
2225 % %
2226 % %
2227 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2228 %
2229 % DrawImage() draws a graphic primitive on your image. The primitive
2230 % may be represented as a string or filename. Precede the filename with an
2231 % "at" sign (@) and the contents of the file are drawn on the image. You
2232 % can affect how text is drawn by setting one or more members of the draw
2233 % info structure.
2234 %
2235 % The format of the DrawImage method is:
2236 %
2237 % MagickBooleanType DrawImage(Image *image,const DrawInfo *draw_info)
2238 %
2239 % A description of each parameter follows:
2240 %
2241 % o image: the image.
2242 %
2243 % o draw_info: the draw info.
2244 %
2245 */
2246 
2247 static MagickBooleanType CheckPrimitiveExtent(MVGInfo *mvg_info,
2248  const double pad)
2249 {
2250  char
2251  **text = (char **) NULL;
2252 
2253  double
2254  extent;
2255 
2256  size_t
2257  quantum;
2258 
2259  ssize_t
2260  i;
2261 
2262  /*
2263  Check if there is enough storage for drawing primitives.
2264  */
2265  quantum=sizeof(**mvg_info->primitive_info);
2266  extent=(double) mvg_info->offset+pad+(PrimitiveExtentPad+1)*quantum;
2267  if (extent <= (double) *mvg_info->extent)
2268  return(MagickTrue);
2269  if ((extent >= (double) MAGICK_SSIZE_MAX) || (IsNaN(extent) != 0))
2270  return(MagickFalse);
2271  if (mvg_info->offset > 0)
2272  {
2273  text=(char **) AcquireQuantumMemory(mvg_info->offset,sizeof(*text));
2274  if (text == (char **) NULL)
2275  return(MagickFalse);
2276  for (i=0; i < mvg_info->offset; i++)
2277  text[i]=(*mvg_info->primitive_info)[i].text;
2278  }
2279  *mvg_info->primitive_info=(PrimitiveInfo *) ResizeQuantumMemory(
2280  *mvg_info->primitive_info,(size_t) (extent+1),quantum);
2281  if (*mvg_info->primitive_info != (PrimitiveInfo *) NULL)
2282  {
2283  if (text != (char **) NULL)
2284  text=(char **) RelinquishMagickMemory(text);
2285  *mvg_info->extent=(size_t) extent;
2286  for (i=mvg_info->offset+1; i <= (ssize_t) extent; i++)
2287  {
2288  (*mvg_info->primitive_info)[i].primitive=UndefinedPrimitive;
2289  (*mvg_info->primitive_info)[i].text=(char *) NULL;
2290  }
2291  return(MagickTrue);
2292  }
2293  /*
2294  Reallocation failed, allocate a primitive to facilitate unwinding.
2295  */
2296  if (text != (char **) NULL)
2297  {
2298  for (i=0; i < mvg_info->offset; i++)
2299  if (text[i] != (char *) NULL)
2300  text[i]=DestroyString(text[i]);
2301  text=(char **) RelinquishMagickMemory(text);
2302  }
2303  (void) ThrowMagickException(mvg_info->exception,GetMagickModule(),
2304  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
2305  *mvg_info->primitive_info=(PrimitiveInfo *) AcquireCriticalMemory((size_t)
2306  (PrimitiveExtentPad+1)*quantum);
2307  (void) memset(*mvg_info->primitive_info,0,(size_t) ((PrimitiveExtentPad+1)*
2308  quantum));
2309  *mvg_info->extent=1;
2310  mvg_info->offset=0;
2311  return(MagickFalse);
2312 }
2313 
2314 static inline double GetDrawValue(const char *magick_restrict string,
2315  char **magick_restrict sentinel)
2316 {
2317  char
2318  **magick_restrict q;
2319 
2320  double
2321  value;
2322 
2323  q=sentinel;
2324  value=InterpretLocaleValue(string,q);
2325  sentinel=q;
2326  return(value);
2327 }
2328 
2329 static int MVGMacroCompare(const void *target,const void *source)
2330 {
2331  const char
2332  *p,
2333  *q;
2334 
2335  p=(const char *) target;
2336  q=(const char *) source;
2337  return(strcmp(p,q));
2338 }
2339 
2340 static SplayTreeInfo *GetMVGMacros(const char *primitive)
2341 {
2342  char
2343  *macro,
2344  *token;
2345 
2346  const char
2347  *q;
2348 
2349  size_t
2350  extent;
2351 
2353  *macros;
2354 
2355  /*
2356  Scan graphic primitives for definitions and classes.
2357  */
2358  if (primitive == (const char *) NULL)
2359  return((SplayTreeInfo *) NULL);
2360  macros=NewSplayTree(MVGMacroCompare,RelinquishMagickMemory,
2361  RelinquishMagickMemory);
2362  macro=AcquireString(primitive);
2363  token=AcquireString(primitive);
2364  extent=strlen(token)+MagickPathExtent;
2365  for (q=primitive; *q != '\0'; )
2366  {
2367  if (GetNextToken(q,&q,extent,token) < 1)
2368  break;
2369  if (*token == '\0')
2370  break;
2371  if (LocaleCompare("push",token) == 0)
2372  {
2373  const char
2374  *end,
2375  *start;
2376 
2377  (void) GetNextToken(q,&q,extent,token);
2378  if (*q == '"')
2379  {
2380  char
2381  name[MagickPathExtent];
2382 
2383  const char
2384  *p;
2385 
2386  ssize_t
2387  n;
2388 
2389  /*
2390  Named macro (e.g. push graphic-context "wheel").
2391  */
2392  (void) GetNextToken(q,&q,extent,token);
2393  start=q;
2394  end=q;
2395  (void) CopyMagickString(name,token,MagickPathExtent);
2396  n=1;
2397  for (p=q; *p != '\0'; )
2398  {
2399  if (GetNextToken(p,&p,extent,token) < 1)
2400  break;
2401  if (*token == '\0')
2402  break;
2403  if (LocaleCompare(token,"pop") == 0)
2404  {
2405  end=p-strlen(token)-1;
2406  n--;
2407  }
2408  if (LocaleCompare(token,"push") == 0)
2409  n++;
2410  if ((n == 0) && (end >= start))
2411  {
2412  size_t
2413  length=(size_t) (end-start);
2414 
2415  /*
2416  Extract macro.
2417  */
2418  (void) GetNextToken(p,&p,extent,token);
2419  if (length > 0)
2420  {
2421  (void) CopyMagickString(macro,start,length);
2422  (void) AddValueToSplayTree(macros,ConstantString(name),
2423  ConstantString(macro));
2424  }
2425  break;
2426  }
2427  }
2428  }
2429  }
2430  }
2431  token=DestroyString(token);
2432  macro=DestroyString(macro);
2433  return(macros);
2434 }
2435 
2436 static inline MagickBooleanType IsPoint(const char *point)
2437 {
2438  char
2439  *p;
2440 
2441  double
2442  value;
2443 
2444  value=GetDrawValue(point,&p);
2445  return((fabs(value) < MagickEpsilon) && (p == point) ? MagickFalse :
2446  MagickTrue);
2447 }
2448 
2449 static inline MagickBooleanType TracePoint(PrimitiveInfo *primitive_info,
2450  const PointInfo point)
2451 {
2452  primitive_info->coordinates=1;
2453  primitive_info->closed_subpath=MagickFalse;
2454  primitive_info->point=point;
2455  return(MagickTrue);
2456 }
2457 
2458 static MagickBooleanType RenderMVGContent(Image *image,
2459  const DrawInfo *draw_info,const size_t depth)
2460 {
2461 #define RenderImageTag "Render/Image"
2462 
2463  AffineMatrix
2464  affine,
2465  current;
2466 
2467  char
2468  key[2*MaxTextExtent],
2469  keyword[MaxTextExtent],
2470  geometry[MaxTextExtent],
2471  name[MaxTextExtent],
2472  *next_token,
2473  pattern[MaxTextExtent],
2474  *primitive,
2475  *token;
2476 
2477  const char
2478  *p,
2479  *q;
2480 
2481  double
2482  angle,
2483  coordinates,
2484  cursor,
2485  factor,
2486  primitive_extent;
2487 
2488  DrawInfo
2489  *clone_info,
2490  **graphic_context;
2491 
2492  MagickBooleanType
2493  proceed;
2494 
2495  MagickStatusType
2496  status;
2497 
2498  MVGInfo
2499  mvg_info;
2500 
2501  PointInfo
2502  point;
2503 
2504  PixelPacket
2505  start_color;
2506 
2508  *primitive_info;
2509 
2510  PrimitiveType
2511  primitive_type;
2512 
2513  SegmentInfo
2514  bounds;
2515 
2516  size_t
2517  extent,
2518  number_points;
2519 
2521  *macros;
2522 
2523  ssize_t
2524  defsDepth,
2525  i,
2526  j,
2527  k,
2528  n,
2529  symbolDepth,
2530  x;
2531 
2532  TypeMetric
2533  metrics;
2534 
2535  assert(image != (Image *) NULL);
2536  assert(image->signature == MagickCoreSignature);
2537  assert(draw_info != (DrawInfo *) NULL);
2538  assert(draw_info->signature == MagickCoreSignature);
2539  if (IsEventLogging() != MagickFalse)
2540  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
2541  if (depth > MagickMaxRecursionDepth)
2542  ThrowBinaryImageException(DrawError,"VectorGraphicsNestedTooDeeply",
2543  image->filename);
2544  if ((draw_info->primitive == (char *) NULL) ||
2545  (*draw_info->primitive == '\0'))
2546  return(MagickFalse);
2547  if (draw_info->debug != MagickFalse)
2548  (void) LogMagickEvent(DrawEvent,GetMagickModule(),"begin draw-image");
2549  if (SetImageStorageClass(image,DirectClass) == MagickFalse)
2550  return(MagickFalse);
2551  if (image->matte == MagickFalse)
2552  {
2553  status=SetImageAlphaChannel(image,OpaqueAlphaChannel);
2554  if (status == MagickFalse)
2555  return(MagickFalse);
2556  }
2557  primitive=(char *) NULL;
2558  if ((*draw_info->primitive == '@') && (strlen(draw_info->primitive) > 1) &&
2559  (*(draw_info->primitive+1) != '-') && (depth == 0))
2560  primitive=FileToString(draw_info->primitive,~0UL,&image->exception);
2561  else
2562  primitive=AcquireString(draw_info->primitive);
2563  if (primitive == (char *) NULL)
2564  return(MagickFalse);
2565  primitive_extent=(double) strlen(primitive);
2566  (void) SetImageArtifact(image,"mvg:vector-graphics",primitive);
2567  n=0;
2568  /*
2569  Allocate primitive info memory.
2570  */
2571  graphic_context=(DrawInfo **) AcquireMagickMemory(sizeof(*graphic_context));
2572  if (graphic_context == (DrawInfo **) NULL)
2573  {
2574  primitive=DestroyString(primitive);
2575  ThrowBinaryImageException(ResourceLimitError,"MemoryAllocationFailed",
2576  image->filename);
2577  }
2578  number_points=(size_t) PrimitiveExtentPad;
2579  primitive_info=(PrimitiveInfo *) AcquireQuantumMemory((size_t)
2580  (number_points+1),sizeof(*primitive_info));
2581  if (primitive_info == (PrimitiveInfo *) NULL)
2582  {
2583  primitive=DestroyString(primitive);
2584  for ( ; n >= 0; n--)
2585  graphic_context[n]=DestroyDrawInfo(graphic_context[n]);
2586  graphic_context=(DrawInfo **) RelinquishMagickMemory(graphic_context);
2587  ThrowBinaryImageException(ResourceLimitError,"MemoryAllocationFailed",
2588  image->filename);
2589  }
2590  (void) memset(primitive_info,0,(size_t) (number_points+1)*
2591  sizeof(*primitive_info));
2592  (void) memset(&mvg_info,0,sizeof(mvg_info));
2593  mvg_info.primitive_info=(&primitive_info);
2594  mvg_info.extent=(&number_points);
2595  mvg_info.exception=(&image->exception);
2596  graphic_context[n]=CloneDrawInfo((ImageInfo *) NULL,draw_info);
2597  graphic_context[n]->viewbox=image->page;
2598  if ((image->page.width == 0) || (image->page.height == 0))
2599  {
2600  graphic_context[n]->viewbox.width=image->columns;
2601  graphic_context[n]->viewbox.height=image->rows;
2602  }
2603  token=AcquireString(primitive);
2604  extent=strlen(token)+MaxTextExtent;
2605  cursor=0.0;
2606  defsDepth=0;
2607  symbolDepth=0;
2608  macros=GetMVGMacros(primitive);
2609  status=QueryColorDatabase("#000000",&start_color,&image->exception);
2610  for (q=primitive; *q != '\0'; )
2611  {
2612  /*
2613  Interpret graphic primitive.
2614  */
2615  if (GetNextToken(q,&q,MaxTextExtent,keyword) < 1)
2616  break;
2617  if (*keyword == '\0')
2618  break;
2619  if (*keyword == '#')
2620  {
2621  /*
2622  Comment.
2623  */
2624  while ((*q != '\n') && (*q != '\0'))
2625  q++;
2626  continue;
2627  }
2628  p=q-strlen(keyword)-1;
2629  primitive_type=UndefinedPrimitive;
2630  current=graphic_context[n]->affine;
2631  GetAffineMatrix(&affine);
2632  *token='\0';
2633  switch (*keyword)
2634  {
2635  case ';':
2636  break;
2637  case 'a':
2638  case 'A':
2639  {
2640  if (LocaleCompare("affine",keyword) == 0)
2641  {
2642  (void) GetNextToken(q,&q,extent,token);
2643  affine.sx=GetDrawValue(token,&next_token);
2644  if (token == next_token)
2645  ThrowPointExpectedException(image,token);
2646  (void) GetNextToken(q,&q,extent,token);
2647  if (*token == ',')
2648  (void) GetNextToken(q,&q,extent,token);
2649  affine.rx=GetDrawValue(token,&next_token);
2650  if (token == next_token)
2651  ThrowPointExpectedException(image,token);
2652  (void) GetNextToken(q,&q,extent,token);
2653  if (*token == ',')
2654  (void) GetNextToken(q,&q,extent,token);
2655  affine.ry=GetDrawValue(token,&next_token);
2656  if (token == next_token)
2657  ThrowPointExpectedException(image,token);
2658  (void) GetNextToken(q,&q,extent,token);
2659  if (*token == ',')
2660  (void) GetNextToken(q,&q,extent,token);
2661  affine.sy=GetDrawValue(token,&next_token);
2662  if (token == next_token)
2663  ThrowPointExpectedException(image,token);
2664  (void) GetNextToken(q,&q,extent,token);
2665  if (*token == ',')
2666  (void) GetNextToken(q,&q,extent,token);
2667  affine.tx=GetDrawValue(token,&next_token);
2668  if (token == next_token)
2669  ThrowPointExpectedException(image,token);
2670  (void) GetNextToken(q,&q,extent,token);
2671  if (*token == ',')
2672  (void) GetNextToken(q,&q,extent,token);
2673  affine.ty=GetDrawValue(token,&next_token);
2674  if (token == next_token)
2675  ThrowPointExpectedException(image,token);
2676  break;
2677  }
2678  if (LocaleCompare("arc",keyword) == 0)
2679  {
2680  primitive_type=ArcPrimitive;
2681  break;
2682  }
2683  status=MagickFalse;
2684  break;
2685  }
2686  case 'b':
2687  case 'B':
2688  {
2689  if (LocaleCompare("bezier",keyword) == 0)
2690  {
2691  primitive_type=BezierPrimitive;
2692  break;
2693  }
2694  if (LocaleCompare("border-color",keyword) == 0)
2695  {
2696  (void) GetNextToken(q,&q,extent,token);
2697  status&=QueryColorDatabase(token,&graphic_context[n]->border_color,
2698  &image->exception);
2699  break;
2700  }
2701  status=MagickFalse;
2702  break;
2703  }
2704  case 'c':
2705  case 'C':
2706  {
2707  if (LocaleCompare("class",keyword) == 0)
2708  {
2709  const char
2710  *mvg_class;
2711 
2712  (void) GetNextToken(q,&q,extent,token);
2713  if ((*token == '\0') || (*token == ';'))
2714  {
2715  status=MagickFalse;
2716  break;
2717  }
2718  /*
2719  Identify recursion.
2720  */
2721  for (i=0; i < n; i++)
2722  if (LocaleCompare(token,graphic_context[i]->id) == 0)
2723  break;
2724  if (i < n)
2725  break;
2726  mvg_class=(const char *) GetValueFromSplayTree(macros,token);
2727  if ((graphic_context[n]->render != MagickFalse) &&
2728  (mvg_class != (const char *) NULL) && (p > primitive))
2729  {
2730  char
2731  *elements;
2732 
2733  ssize_t
2734  offset;
2735 
2736  /*
2737  Inject class elements in stream.
2738  */
2739  offset=(ssize_t) (p-primitive);
2740  elements=AcquireString(primitive);
2741  elements[offset]='\0';
2742  (void) ConcatenateString(&elements,mvg_class);
2743  (void) ConcatenateString(&elements,"\n");
2744  (void) ConcatenateString(&elements,q);
2745  primitive=DestroyString(primitive);
2746  primitive=elements;
2747  q=primitive+offset;
2748  }
2749  break;
2750  }
2751  if (LocaleCompare("clip-path",keyword) == 0)
2752  {
2753  const char
2754  *clip_path;
2755 
2756  /*
2757  Take a node from within the MVG document, and duplicate it here.
2758  */
2759  (void) GetNextToken(q,&q,extent,token);
2760  if (*token == '\0')
2761  {
2762  status=MagickFalse;
2763  break;
2764  }
2765  (void) CloneString(&graphic_context[n]->clip_mask,token);
2766  clip_path=(const char *) GetValueFromSplayTree(macros,token);
2767  if (clip_path != (const char *) NULL)
2768  {
2769  if (graphic_context[n]->clipping_mask != (Image *) NULL)
2770  graphic_context[n]->clipping_mask=
2771  DestroyImage(graphic_context[n]->clipping_mask);
2772  graphic_context[n]->clipping_mask=DrawClippingMask(image,
2773  graphic_context[n],token,clip_path,&image->exception);
2774  if (graphic_context[n]->compliance != SVGCompliance)
2775  {
2776  const char
2777  *clip_path;
2778 
2779  clip_path=(const char *) GetValueFromSplayTree(macros,
2780  graphic_context[n]->clip_mask);
2781  if (clip_path != (const char *) NULL)
2782  (void) SetImageArtifact(image,
2783  graphic_context[n]->clip_mask,clip_path);
2784  status&=DrawClipPath(image,graphic_context[n],
2785  graphic_context[n]->clip_mask);
2786  }
2787  }
2788  break;
2789  }
2790  if (LocaleCompare("clip-rule",keyword) == 0)
2791  {
2792  ssize_t
2793  fill_rule;
2794 
2795  (void) GetNextToken(q,&q,extent,token);
2796  fill_rule=ParseCommandOption(MagickFillRuleOptions,MagickFalse,
2797  token);
2798  if (fill_rule == -1)
2799  {
2800  status=MagickFalse;
2801  break;
2802  }
2803  graphic_context[n]->fill_rule=(FillRule) fill_rule;
2804  break;
2805  }
2806  if (LocaleCompare("clip-units",keyword) == 0)
2807  {
2808  ssize_t
2809  clip_units;
2810 
2811  (void) GetNextToken(q,&q,extent,token);
2812  clip_units=ParseCommandOption(MagickClipPathOptions,MagickFalse,
2813  token);
2814  if (clip_units == -1)
2815  {
2816  status=MagickFalse;
2817  break;
2818  }
2819  graphic_context[n]->clip_units=(ClipPathUnits) clip_units;
2820  if (clip_units == ObjectBoundingBox)
2821  {
2822  GetAffineMatrix(&current);
2823  affine.sx=draw_info->bounds.x2;
2824  affine.sy=draw_info->bounds.y2;
2825  affine.tx=draw_info->bounds.x1;
2826  affine.ty=draw_info->bounds.y1;
2827  break;
2828  }
2829  break;
2830  }
2831  if (LocaleCompare("circle",keyword) == 0)
2832  {
2833  primitive_type=CirclePrimitive;
2834  break;
2835  }
2836  if (LocaleCompare("color",keyword) == 0)
2837  {
2838  primitive_type=ColorPrimitive;
2839  break;
2840  }
2841  if (LocaleCompare("compliance",keyword) == 0)
2842  {
2843  /*
2844  MVG compliance associates a clipping mask with an image; SVG
2845  compliance associates a clipping mask with a graphics context.
2846  */
2847  (void) GetNextToken(q,&q,extent,token);
2848  graphic_context[n]->compliance=(ComplianceType) ParseCommandOption(
2849  MagickComplianceOptions,MagickFalse,token);
2850  break;
2851  }
2852  if (LocaleCompare("currentColor",keyword) == 0)
2853  {
2854  (void) GetNextToken(q,&q,extent,token);
2855  break;
2856  }
2857  status=MagickFalse;
2858  break;
2859  }
2860  case 'd':
2861  case 'D':
2862  {
2863  if (LocaleCompare("decorate",keyword) == 0)
2864  {
2865  ssize_t
2866  decorate;
2867 
2868  (void) GetNextToken(q,&q,extent,token);
2869  decorate=ParseCommandOption(MagickDecorateOptions,MagickFalse,
2870  token);
2871  if (decorate == -1)
2872  {
2873  status=MagickFalse;
2874  break;
2875  }
2876  graphic_context[n]->decorate=(DecorationType) decorate;
2877  break;
2878  }
2879  if (LocaleCompare("density",keyword) == 0)
2880  {
2881  (void) GetNextToken(q,&q,extent,token);
2882  (void) CloneString(&graphic_context[n]->density,token);
2883  break;
2884  }
2885  if (LocaleCompare("direction",keyword) == 0)
2886  {
2887  ssize_t
2888  direction;
2889 
2890  (void) GetNextToken(q,&q,extent,token);
2891  direction=ParseCommandOption(MagickDirectionOptions,MagickFalse,
2892  token);
2893  if (direction == -1)
2894  status=MagickFalse;
2895  else
2896  graphic_context[n]->direction=(DirectionType) direction;
2897  break;
2898  }
2899  status=MagickFalse;
2900  break;
2901  }
2902  case 'e':
2903  case 'E':
2904  {
2905  if (LocaleCompare("ellipse",keyword) == 0)
2906  {
2907  primitive_type=EllipsePrimitive;
2908  break;
2909  }
2910  if (LocaleCompare("encoding",keyword) == 0)
2911  {
2912  (void) GetNextToken(q,&q,extent,token);
2913  (void) CloneString(&graphic_context[n]->encoding,token);
2914  break;
2915  }
2916  status=MagickFalse;
2917  break;
2918  }
2919  case 'f':
2920  case 'F':
2921  {
2922  if (LocaleCompare("fill",keyword) == 0)
2923  {
2924  const char
2925  *mvg_class;
2926 
2927  (void) GetNextToken(q,&q,extent,token);
2928  if (graphic_context[n]->clip_path != MagickFalse)
2929  break;
2930  mvg_class=(const char *) GetValueFromSplayTree(macros,token);
2931  if (mvg_class != (const char *) NULL)
2932  {
2933  (void) DrawPatternPath(image,draw_info,mvg_class,
2934  &graphic_context[n]->fill_pattern);
2935  break;
2936  }
2937  (void) FormatLocaleString(pattern,MaxTextExtent,"%s",token);
2938  if (GetImageArtifact(image,pattern) != (const char *) NULL)
2939  {
2940  (void) DrawPatternPath(image,draw_info,token,
2941  &graphic_context[n]->fill_pattern);
2942  break;
2943  }
2944  status&=QueryColorDatabase(token,&graphic_context[n]->fill,
2945  &image->exception);
2946  if (graphic_context[n]->fill_opacity != (double) OpaqueOpacity)
2947  graphic_context[n]->fill.opacity=ClampToQuantum(
2948  graphic_context[n]->fill_opacity);
2949  break;
2950  }
2951  if (LocaleCompare("fill-opacity",keyword) == 0)
2952  {
2953  double
2954  opacity;
2955 
2956  (void) GetNextToken(q,&q,extent,token);
2957  if (graphic_context[n]->clip_path != MagickFalse)
2958  break;
2959  factor=strchr(token,'%') != (char *) NULL ? 0.01 : 1.0;
2960  opacity=MagickMin(MagickMax(factor*
2961  GetDrawValue(token,&next_token),0.0),1.0);
2962  if (token == next_token)
2963  ThrowPointExpectedException(image,token);
2964  if (graphic_context[n]->compliance == SVGCompliance)
2965  graphic_context[n]->fill_opacity*=(1.0-opacity);
2966  else
2967  graphic_context[n]->fill_opacity=((MagickRealType) QuantumRange-
2968  graphic_context[n]->fill_opacity)*(1.0-opacity);
2969  if (graphic_context[n]->fill.opacity != TransparentOpacity)
2970  graphic_context[n]->fill.opacity=(Quantum)
2971  graphic_context[n]->fill_opacity;
2972  else
2973  graphic_context[n]->fill.opacity=ClampToQuantum((MagickRealType)
2974  QuantumRange*(1.0-opacity));
2975  break;
2976  }
2977  if (LocaleCompare("fill-rule",keyword) == 0)
2978  {
2979  ssize_t
2980  fill_rule;
2981 
2982  (void) GetNextToken(q,&q,extent,token);
2983  fill_rule=ParseCommandOption(MagickFillRuleOptions,MagickFalse,
2984  token);
2985  if (fill_rule == -1)
2986  {
2987  status=MagickFalse;
2988  break;
2989  }
2990  graphic_context[n]->fill_rule=(FillRule) fill_rule;
2991  break;
2992  }
2993  if (LocaleCompare("font",keyword) == 0)
2994  {
2995  (void) GetNextToken(q,&q,extent,token);
2996  (void) CloneString(&graphic_context[n]->font,token);
2997  if (LocaleCompare("none",token) == 0)
2998  graphic_context[n]->font=(char *) RelinquishMagickMemory(
2999  graphic_context[n]->font);
3000  break;
3001  }
3002  if (LocaleCompare("font-family",keyword) == 0)
3003  {
3004  (void) GetNextToken(q,&q,extent,token);
3005  (void) CloneString(&graphic_context[n]->family,token);
3006  break;
3007  }
3008  if (LocaleCompare("font-size",keyword) == 0)
3009  {
3010  (void) GetNextToken(q,&q,extent,token);
3011  graphic_context[n]->pointsize=GetDrawValue(token,&next_token);
3012  if (token == next_token)
3013  ThrowPointExpectedException(image,token);
3014  break;
3015  }
3016  if (LocaleCompare("font-stretch",keyword) == 0)
3017  {
3018  ssize_t
3019  stretch;
3020 
3021  (void) GetNextToken(q,&q,extent,token);
3022  stretch=ParseCommandOption(MagickStretchOptions,MagickFalse,token);
3023  if (stretch == -1)
3024  {
3025  status=MagickFalse;
3026  break;
3027  }
3028  graphic_context[n]->stretch=(StretchType) stretch;
3029  break;
3030  }
3031  if (LocaleCompare("font-style",keyword) == 0)
3032  {
3033  ssize_t
3034  style;
3035 
3036  (void) GetNextToken(q,&q,extent,token);
3037  style=ParseCommandOption(MagickStyleOptions,MagickFalse,token);
3038  if (style == -1)
3039  {
3040  status=MagickFalse;
3041  break;
3042  }
3043  graphic_context[n]->style=(StyleType) style;
3044  break;
3045  }
3046  if (LocaleCompare("font-weight",keyword) == 0)
3047  {
3048  ssize_t
3049  weight;
3050 
3051  (void) GetNextToken(q,&q,extent,token);
3052  weight=ParseCommandOption(MagickWeightOptions,MagickFalse,token);
3053  if (weight == -1)
3054  weight=(ssize_t) StringToUnsignedLong(token);
3055  graphic_context[n]->weight=(size_t) weight;
3056  break;
3057  }
3058  status=MagickFalse;
3059  break;
3060  }
3061  case 'g':
3062  case 'G':
3063  {
3064  if (LocaleCompare("gradient-units",keyword) == 0)
3065  {
3066  (void) GetNextToken(q,&q,extent,token);
3067  break;
3068  }
3069  if (LocaleCompare("gravity",keyword) == 0)
3070  {
3071  ssize_t
3072  gravity;
3073 
3074  (void) GetNextToken(q,&q,extent,token);
3075  gravity=ParseCommandOption(MagickGravityOptions,MagickFalse,token);
3076  if (gravity == -1)
3077  {
3078  status=MagickFalse;
3079  break;
3080  }
3081  graphic_context[n]->gravity=(GravityType) gravity;
3082  break;
3083  }
3084  status=MagickFalse;
3085  break;
3086  }
3087  case 'i':
3088  case 'I':
3089  {
3090  if (LocaleCompare("image",keyword) == 0)
3091  {
3092  ssize_t
3093  compose;
3094 
3095  primitive_type=ImagePrimitive;
3096  (void) GetNextToken(q,&q,extent,token);
3097  compose=ParseCommandOption(MagickComposeOptions,MagickFalse,token);
3098  if (compose == -1)
3099  {
3100  status=MagickFalse;
3101  break;
3102  }
3103  graphic_context[n]->compose=(CompositeOperator) compose;
3104  break;
3105  }
3106  if (LocaleCompare("interline-spacing",keyword) == 0)
3107  {
3108  (void) GetNextToken(q,&q,extent,token);
3109  graphic_context[n]->interline_spacing=GetDrawValue(token,
3110  &next_token);
3111  if (token == next_token)
3112  ThrowPointExpectedException(image,token);
3113  break;
3114  }
3115  if (LocaleCompare("interword-spacing",keyword) == 0)
3116  {
3117  (void) GetNextToken(q,&q,extent,token);
3118  graphic_context[n]->interword_spacing=GetDrawValue(token,
3119  &next_token);
3120  if (token == next_token)
3121  ThrowPointExpectedException(image,token);
3122  break;
3123  }
3124  status=MagickFalse;
3125  break;
3126  }
3127  case 'k':
3128  case 'K':
3129  {
3130  if (LocaleCompare("kerning",keyword) == 0)
3131  {
3132  (void) GetNextToken(q,&q,extent,token);
3133  graphic_context[n]->kerning=GetDrawValue(token,&next_token);
3134  if (token == next_token)
3135  ThrowPointExpectedException(image,token);
3136  break;
3137  }
3138  status=MagickFalse;
3139  break;
3140  }
3141  case 'l':
3142  case 'L':
3143  {
3144  if (LocaleCompare("letter-spacing",keyword) == 0)
3145  {
3146  (void) GetNextToken(q,&q,extent,token);
3147  if (IsPoint(token) == MagickFalse)
3148  break;
3149  clone_info=CloneDrawInfo((ImageInfo *) NULL,graphic_context[n]);
3150  clone_info->text=AcquireString(" ");
3151  status&=GetTypeMetrics(image,clone_info,&metrics);
3152  graphic_context[n]->kerning=metrics.width*
3153  GetDrawValue(token,&next_token);
3154  clone_info=DestroyDrawInfo(clone_info);
3155  if (token == next_token)
3156  ThrowPointExpectedException(image,token);
3157  break;
3158  }
3159  if (LocaleCompare("line",keyword) == 0)
3160  {
3161  primitive_type=LinePrimitive;
3162  break;
3163  }
3164  status=MagickFalse;
3165  break;
3166  }
3167  case 'm':
3168  case 'M':
3169  {
3170  if (LocaleCompare("mask",keyword) == 0)
3171  {
3172  const char
3173  *mask_path;
3174 
3175  /*
3176  Take a node from within the MVG document, and duplicate it here.
3177  */
3178  (void) GetNextToken(q,&q,extent,token);
3179  mask_path=(const char *) GetValueFromSplayTree(macros,token);
3180  if (mask_path != (const char *) NULL)
3181  {
3182  if (graphic_context[n]->composite_mask != (Image *) NULL)
3183  graphic_context[n]->composite_mask=
3184  DestroyImage(graphic_context[n]->composite_mask);
3185  graphic_context[n]->composite_mask=DrawCompositeMask(image,
3186  graphic_context[n],token,mask_path,&image->exception);
3187  if (graphic_context[n]->compliance != SVGCompliance)
3188  status=SetImageMask(image,graphic_context[n]->composite_mask);
3189  }
3190  break;
3191  }
3192  if (LocaleCompare("matte",keyword) == 0)
3193  {
3194  primitive_type=MattePrimitive;
3195  break;
3196  }
3197  status=MagickFalse;
3198  break;
3199  }
3200  case 'o':
3201  case 'O':
3202  {
3203  if (LocaleCompare("offset",keyword) == 0)
3204  {
3205  (void) GetNextToken(q,&q,extent,token);
3206  break;
3207  }
3208  if (LocaleCompare("opacity",keyword) == 0)
3209  {
3210  double
3211  opacity;
3212 
3213  (void) GetNextToken(q,&q,extent,token);
3214  if (graphic_context[n]->clip_path != MagickFalse)
3215  break;
3216  factor=strchr(token,'%') != (char *) NULL ? 0.01 : 1.0;
3217  opacity=1.0-MagickMin(MagickMax(factor*
3218  GetDrawValue(token,&next_token),0.0),1.0);
3219  if (token == next_token)
3220  ThrowPointExpectedException(image,token);
3221  if (graphic_context[n]->compliance == SVGCompliance)
3222  {
3223  graphic_context[n]->fill_opacity*=opacity;
3224  graphic_context[n]->stroke_opacity*=opacity;
3225  }
3226  else
3227  {
3228  graphic_context[n]->fill_opacity=(double) QuantumRange*opacity;
3229  graphic_context[n]->stroke_opacity=(double) QuantumRange*
3230  opacity;
3231  }
3232  if (graphic_context[n]->fill.opacity != (double) TransparentOpacity)
3233  {
3234  graphic_context[n]->fill.opacity=
3235  graphic_context[n]->fill_opacity;
3236  graphic_context[n]->stroke.opacity=
3237  graphic_context[n]->stroke_opacity;
3238  }
3239  else
3240  {
3241  graphic_context[n]->fill.opacity=(MagickRealType)
3242  ClampToQuantum((double) QuantumRange*opacity);
3243  graphic_context[n]->stroke.opacity=(MagickRealType)
3244  ClampToQuantum((double) QuantumRange*opacity);
3245  }
3246  break;
3247  }
3248  status=MagickFalse;
3249  break;
3250  }
3251  case 'p':
3252  case 'P':
3253  {
3254  if (LocaleCompare("path",keyword) == 0)
3255  {
3256  primitive_type=PathPrimitive;
3257  break;
3258  }
3259  if (LocaleCompare("point",keyword) == 0)
3260  {
3261  primitive_type=PointPrimitive;
3262  break;
3263  }
3264  if (LocaleCompare("polyline",keyword) == 0)
3265  {
3266  primitive_type=PolylinePrimitive;
3267  break;
3268  }
3269  if (LocaleCompare("polygon",keyword) == 0)
3270  {
3271  primitive_type=PolygonPrimitive;
3272  break;
3273  }
3274  if (LocaleCompare("pop",keyword) == 0)
3275  {
3276  if (GetNextToken(q,&q,extent,token) < 1)
3277  break;
3278  if (LocaleCompare("class",token) == 0)
3279  break;
3280  if (LocaleCompare("clip-path",token) == 0)
3281  break;
3282  if (LocaleCompare("defs",token) == 0)
3283  {
3284  defsDepth--;
3285  graphic_context[n]->render=defsDepth > 0 ? MagickFalse :
3286  MagickTrue;
3287  break;
3288  }
3289  if (LocaleCompare("gradient",token) == 0)
3290  break;
3291  if (LocaleCompare("graphic-context",token) == 0)
3292  {
3293  if (n <= 0)
3294  {
3295  (void) ThrowMagickException(&image->exception,
3296  GetMagickModule(),DrawError,
3297  "UnbalancedGraphicContextPushPop","`%s'",token);
3298  status=MagickFalse;
3299  n=0;
3300  break;
3301  }
3302  if ((graphic_context[n]->clip_mask != (char *) NULL) &&
3303  (graphic_context[n]->compliance != SVGCompliance))
3304  if (LocaleCompare(graphic_context[n]->clip_mask,
3305  graphic_context[n-1]->clip_mask) != 0)
3306  status=SetImageClipMask(image,(Image *) NULL);
3307  graphic_context[n]=DestroyDrawInfo(graphic_context[n]);
3308  n--;
3309  break;
3310  }
3311  if (LocaleCompare("mask",token) == 0)
3312  break;
3313  if (LocaleCompare("pattern",token) == 0)
3314  break;
3315  if (LocaleCompare("symbol",token) == 0)
3316  {
3317  symbolDepth--;
3318  graphic_context[n]->render=symbolDepth > 0 ? MagickFalse :
3319  MagickTrue;
3320  break;
3321  }
3322  status=MagickFalse;
3323  break;
3324  }
3325  if (LocaleCompare("push",keyword) == 0)
3326  {
3327  if (GetNextToken(q,&q,extent,token) < 1)
3328  break;
3329  if (LocaleCompare("class",token) == 0)
3330  {
3331  /*
3332  Class context.
3333  */
3334  for (p=q; *q != '\0'; )
3335  {
3336  if (GetNextToken(q,&q,extent,token) < 1)
3337  break;
3338  if (LocaleCompare(token,"pop") != 0)
3339  continue;
3340  (void) GetNextToken(q,(const char **) NULL,extent,token);
3341  if (LocaleCompare(token,"class") != 0)
3342  continue;
3343  break;
3344  }
3345  (void) GetNextToken(q,&q,extent,token);
3346  break;
3347  }
3348  if (LocaleCompare("clip-path",token) == 0)
3349  {
3350  (void) GetNextToken(q,&q,extent,token);
3351  for (p=q; *q != '\0'; )
3352  {
3353  if (GetNextToken(q,&q,extent,token) < 1)
3354  break;
3355  if (LocaleCompare(token,"pop") != 0)
3356  continue;
3357  (void) GetNextToken(q,(const char **) NULL,extent,token);
3358  if (LocaleCompare(token,"clip-path") != 0)
3359  continue;
3360  break;
3361  }
3362  if ((q == (char *) NULL) || (p == (char *) NULL) || ((q-4) < p))
3363  {
3364  status=MagickFalse;
3365  break;
3366  }
3367  (void) GetNextToken(q,&q,extent,token);
3368  break;
3369  }
3370  if (LocaleCompare("defs",token) == 0)
3371  {
3372  defsDepth++;
3373  graphic_context[n]->render=defsDepth > 0 ? MagickFalse :
3374  MagickTrue;
3375  break;
3376  }
3377  if (LocaleCompare("gradient",token) == 0)
3378  {
3379  char
3380  key[2*MaxTextExtent],
3381  name[MaxTextExtent],
3382  type[MaxTextExtent];
3383 
3384  SegmentInfo
3385  segment;
3386 
3387  (void) GetNextToken(q,&q,extent,token);
3388  (void) CopyMagickString(name,token,MaxTextExtent);
3389  (void) GetNextToken(q,&q,extent,token);
3390  (void) CopyMagickString(type,token,MaxTextExtent);
3391  (void) GetNextToken(q,&q,extent,token);
3392  segment.x1=GetDrawValue(token,&next_token);
3393  if (token == next_token)
3394  ThrowPointExpectedException(image,token);
3395  (void) GetNextToken(q,&q,extent,token);
3396  if (*token == ',')
3397  (void) GetNextToken(q,&q,extent,token);
3398  segment.y1=GetDrawValue(token,&next_token);
3399  if (token == next_token)
3400  ThrowPointExpectedException(image,token);
3401  (void) GetNextToken(q,&q,extent,token);
3402  if (*token == ',')
3403  (void) GetNextToken(q,&q,extent,token);
3404  segment.x2=GetDrawValue(token,&next_token);
3405  if (token == next_token)
3406  ThrowPointExpectedException(image,token);
3407  (void) GetNextToken(q,&q,extent,token);
3408  if (*token == ',')
3409  (void) GetNextToken(q,&q,extent,token);
3410  segment.y2=GetDrawValue(token,&next_token);
3411  if (token == next_token)
3412  ThrowPointExpectedException(image,token);
3413  if (LocaleCompare(type,"radial") == 0)
3414  {
3415  (void) GetNextToken(q,&q,extent,token);
3416  if (*token == ',')
3417  (void) GetNextToken(q,&q,extent,token);
3418  }
3419  for (p=q; *q != '\0'; )
3420  {
3421  if (GetNextToken(q,&q,extent,token) < 1)
3422  break;
3423  if (LocaleCompare(token,"pop") != 0)
3424  continue;
3425  (void) GetNextToken(q,(const char **) NULL,extent,token);
3426  if (LocaleCompare(token,"gradient") != 0)
3427  continue;
3428  break;
3429  }
3430  if ((q == (char *) NULL) || (*q == '\0') ||
3431  (p == (char *) NULL) || ((q-4) < p))
3432  {
3433  status=MagickFalse;
3434  break;
3435  }
3436  (void) CopyMagickString(token,p,(size_t) (q-p-4+1));
3437  bounds.x1=graphic_context[n]->affine.sx*segment.x1+
3438  graphic_context[n]->affine.ry*segment.y1+
3439  graphic_context[n]->affine.tx;
3440  bounds.y1=graphic_context[n]->affine.rx*segment.x1+
3441  graphic_context[n]->affine.sy*segment.y1+
3442  graphic_context[n]->affine.ty;
3443  bounds.x2=graphic_context[n]->affine.sx*segment.x2+
3444  graphic_context[n]->affine.ry*segment.y2+
3445  graphic_context[n]->affine.tx;
3446  bounds.y2=graphic_context[n]->affine.rx*segment.x2+
3447  graphic_context[n]->affine.sy*segment.y2+
3448  graphic_context[n]->affine.ty;
3449  (void) FormatLocaleString(key,MaxTextExtent,"%s",name);
3450  (void) SetImageArtifact(image,key,token);
3451  (void) FormatLocaleString(key,MaxTextExtent,"%s-type",name);
3452  (void) SetImageArtifact(image,key,type);
3453  (void) FormatLocaleString(key,MaxTextExtent,"%s-geometry",name);
3454  (void) FormatLocaleString(geometry,MaxTextExtent,
3455  "%gx%g%+.15g%+.15g",
3456  MagickMax(fabs(bounds.x2-bounds.x1+1.0),1.0),
3457  MagickMax(fabs(bounds.y2-bounds.y1+1.0),1.0),
3458  bounds.x1,bounds.y1);
3459  (void) SetImageArtifact(image,key,geometry);
3460  (void) GetNextToken(q,&q,extent,token);
3461  break;
3462  }
3463  if (LocaleCompare("graphic-context",token) == 0)
3464  {
3465  n++;
3466  graphic_context=(DrawInfo **) ResizeQuantumMemory(
3467  graphic_context,(size_t) (n+1),sizeof(*graphic_context));
3468  if (graphic_context == (DrawInfo **) NULL)
3469  {
3470  (void) ThrowMagickException(&image->exception,
3471  GetMagickModule(),ResourceLimitError,
3472  "MemoryAllocationFailed","`%s'",image->filename);
3473  break;
3474  }
3475  graphic_context[n]=CloneDrawInfo((ImageInfo *) NULL,
3476  graphic_context[n-1]);
3477  if (*q == '"')
3478  {
3479  (void) GetNextToken(q,&q,extent,token);
3480  (void) CloneString(&graphic_context[n]->id,token);
3481  }
3482  break;
3483  }
3484  if (LocaleCompare("mask",token) == 0)
3485  {
3486  (void) GetNextToken(q,&q,extent,token);
3487  break;
3488  }
3489  if (LocaleCompare("pattern",token) == 0)
3490  {
3492  bounds;
3493 
3494  (void) GetNextToken(q,&q,extent,token);
3495  (void) CopyMagickString(name,token,MaxTextExtent);
3496  (void) GetNextToken(q,&q,extent,token);
3497  bounds.x=CastDoubleToLong(ceil(GetDrawValue(token,
3498  &next_token)-0.5));
3499  if (token == next_token)
3500  ThrowPointExpectedException(image,token);
3501  (void) GetNextToken(q,&q,extent,token);
3502  if (*token == ',')
3503  (void) GetNextToken(q,&q,extent,token);
3504  bounds.y=CastDoubleToLong(ceil(GetDrawValue(token,
3505  &next_token)-0.5));
3506  if (token == next_token)
3507  ThrowPointExpectedException(image,token);
3508  (void) GetNextToken(q,&q,extent,token);
3509  if (*token == ',')
3510  (void) GetNextToken(q,&q,extent,token);
3511  bounds.width=CastDoubleToUnsigned(GetDrawValue(token,
3512  &next_token)+0.5);
3513  if (token == next_token)
3514  ThrowPointExpectedException(image,token);
3515  (void) GetNextToken(q,&q,extent,token);
3516  if (*token == ',')
3517  (void) GetNextToken(q,&q,extent,token);
3518  bounds.height=CastDoubleToUnsigned(GetDrawValue(token,
3519  &next_token)+0.5);
3520  if (token == next_token)
3521  ThrowPointExpectedException(image,token);
3522  for (p=q; *q != '\0'; )
3523  {
3524  if (GetNextToken(q,&q,extent,token) < 1)
3525  break;
3526  if (LocaleCompare(token,"pop") != 0)
3527  continue;
3528  (void) GetNextToken(q,(const char **) NULL,extent,token);
3529  if (LocaleCompare(token,"pattern") != 0)
3530  continue;
3531  break;
3532  }
3533  if ((q == (char *) NULL) || (p == (char *) NULL) || ((q-4) < p))
3534  {
3535  status=MagickFalse;
3536  break;
3537  }
3538  (void) CopyMagickString(token,p,(size_t) (q-p-4+1));
3539  (void) FormatLocaleString(key,MaxTextExtent,"%s",name);
3540  (void) SetImageArtifact(image,key,token);
3541  (void) FormatLocaleString(key,MaxTextExtent,"%s-geometry",name);
3542  (void) FormatLocaleString(geometry,MaxTextExtent,
3543  "%.20gx%.20g%+.20g%+.20g",(double) bounds.width,(double)
3544  bounds.height,(double) bounds.x,(double) bounds.y);
3545  (void) SetImageArtifact(image,key,geometry);
3546  (void) GetNextToken(q,&q,extent,token);
3547  break;
3548  }
3549  if (LocaleCompare("symbol",token) == 0)
3550  {
3551  symbolDepth++;
3552  graphic_context[n]->render=symbolDepth > 0 ? MagickFalse :
3553  MagickTrue;
3554  break;
3555  }
3556  status=MagickFalse;
3557  break;
3558  }
3559  status=MagickFalse;
3560  break;
3561  }
3562  case 'r':
3563  case 'R':
3564  {
3565  if (LocaleCompare("rectangle",keyword) == 0)
3566  {
3567  primitive_type=RectanglePrimitive;
3568  break;
3569  }
3570  if (LocaleCompare("rotate",keyword) == 0)
3571  {
3572  (void) GetNextToken(q,&q,extent,token);
3573  angle=GetDrawValue(token,&next_token);
3574  if (token == next_token)
3575  ThrowPointExpectedException(image,token);
3576  affine.sx=cos(DegreesToRadians(fmod((double) angle,360.0)));
3577  affine.rx=sin(DegreesToRadians(fmod((double) angle,360.0)));
3578  affine.ry=(-sin(DegreesToRadians(fmod((double) angle,360.0))));
3579  affine.sy=cos(DegreesToRadians(fmod((double) angle,360.0)));
3580  break;
3581  }
3582  if (LocaleCompare("roundRectangle",keyword) == 0)
3583  {
3584  primitive_type=RoundRectanglePrimitive;
3585  break;
3586  }
3587  status=MagickFalse;
3588  break;
3589  }
3590  case 's':
3591  case 'S':
3592  {
3593  if (LocaleCompare("scale",keyword) == 0)
3594  {
3595  (void) GetNextToken(q,&q,extent,token);
3596  affine.sx=GetDrawValue(token,&next_token);
3597  if (token == next_token)
3598  ThrowPointExpectedException(image,token);
3599  (void) GetNextToken(q,&q,extent,token);
3600  if (*token == ',')
3601  (void) GetNextToken(q,&q,extent,token);
3602  affine.sy=GetDrawValue(token,&next_token);
3603  if (token == next_token)
3604  ThrowPointExpectedException(image,token);
3605  break;
3606  }
3607  if (LocaleCompare("skewX",keyword) == 0)
3608  {
3609  (void) GetNextToken(q,&q,extent,token);
3610  angle=GetDrawValue(token,&next_token);
3611  if (token == next_token)
3612  ThrowPointExpectedException(image,token);
3613  affine.ry=sin(DegreesToRadians(angle));
3614  break;
3615  }
3616  if (LocaleCompare("skewY",keyword) == 0)
3617  {
3618  (void) GetNextToken(q,&q,extent,token);
3619  angle=GetDrawValue(token,&next_token);
3620  if (token == next_token)
3621  ThrowPointExpectedException(image,token);
3622  affine.rx=(-tan(DegreesToRadians(angle)/2.0));
3623  break;
3624  }
3625  if (LocaleCompare("stop-color",keyword) == 0)
3626  {
3627  GradientType
3628  type;
3629 
3630  PixelPacket
3631  stop_color;
3632 
3633  (void) GetNextToken(q,&q,extent,token);
3634  status&=QueryColorDatabase(token,&stop_color,&image->exception);
3635  type=LinearGradient;
3636  if (draw_info->gradient.type == RadialGradient)
3637  type=RadialGradient;
3638  (void) GradientImage(image,type,PadSpread,&start_color,&stop_color);
3639  start_color=stop_color;
3640  (void) GetNextToken(q,&q,extent,token);
3641  break;
3642  }
3643  if (LocaleCompare("stroke",keyword) == 0)
3644  {
3645  const char
3646  *mvg_class;
3647 
3648  (void) GetNextToken(q,&q,extent,token);
3649  if (graphic_context[n]->clip_path != MagickFalse)
3650  break;
3651  mvg_class=(const char *) GetValueFromSplayTree(macros,token);
3652  if (mvg_class != (const char *) NULL)
3653  {
3654  (void) DrawPatternPath(image,draw_info,mvg_class,
3655  &graphic_context[n]->stroke_pattern);
3656  break;
3657  }
3658  (void) FormatLocaleString(pattern,MaxTextExtent,"%s",token);
3659  if (GetImageArtifact(image,pattern) != (const char *) NULL)
3660  {
3661  (void) DrawPatternPath(image,draw_info,token,
3662  &graphic_context[n]->stroke_pattern);
3663  break;
3664  }
3665  status&=QueryColorDatabase(token,&graphic_context[n]->stroke,
3666  &image->exception);
3667  if (graphic_context[n]->stroke_opacity != (MagickRealType) OpaqueOpacity)
3668  graphic_context[n]->stroke.opacity=ClampToQuantum(
3669  graphic_context[n]->stroke_opacity);
3670  break;
3671  }
3672  if (LocaleCompare("stroke-antialias",keyword) == 0)
3673  {
3674  (void) GetNextToken(q,&q,extent,token);
3675  graphic_context[n]->stroke_antialias=StringToLong(token) != 0 ?
3676  MagickTrue : MagickFalse;
3677  break;
3678  }
3679  if (LocaleCompare("stroke-dasharray",keyword) == 0)
3680  {
3681  if (graphic_context[n]->dash_pattern != (double *) NULL)
3682  graphic_context[n]->dash_pattern=(double *)
3683  RelinquishMagickMemory(graphic_context[n]->dash_pattern);
3684  if (IsPoint(q) != MagickFalse)
3685  {
3686  const char
3687  *p;
3688 
3689  p=q;
3690  (void) GetNextToken(p,&p,extent,token);
3691  if (*token == ',')
3692  (void) GetNextToken(p,&p,extent,token);
3693  for (x=0; IsPoint(token) != MagickFalse; x++)
3694  {
3695  (void) GetNextToken(p,&p,extent,token);
3696  if (*token == ',')
3697  (void) GetNextToken(p,&p,extent,token);
3698  }
3699  graphic_context[n]->dash_pattern=(double *)
3700  AcquireQuantumMemory((size_t) (2*x+2),
3701  sizeof(*graphic_context[n]->dash_pattern));
3702  if (graphic_context[n]->dash_pattern == (double *) NULL)
3703  {
3704  (void) ThrowMagickException(&image->exception,
3705  GetMagickModule(),ResourceLimitError,
3706  "MemoryAllocationFailed","`%s'",image->filename);
3707  status=MagickFalse;
3708  break;
3709  }
3710  (void) memset(graphic_context[n]->dash_pattern,0,(size_t)
3711  (2*x+2)*sizeof(*graphic_context[n]->dash_pattern));
3712  for (j=0; j < x; j++)
3713  {
3714  (void) GetNextToken(q,&q,extent,token);
3715  if (*token == ',')
3716  (void) GetNextToken(q,&q,extent,token);
3717  graphic_context[n]->dash_pattern[j]=GetDrawValue(token,
3718  &next_token);
3719  if (token == next_token)
3720  ThrowPointExpectedException(image,token);
3721  if (graphic_context[n]->dash_pattern[j] <= 0.0)
3722  status=MagickFalse;
3723  }
3724  if ((x & 0x01) != 0)
3725  for ( ; j < (2*x); j++)
3726  graphic_context[n]->dash_pattern[j]=
3727  graphic_context[n]->dash_pattern[j-x];
3728  graphic_context[n]->dash_pattern[j]=0.0;
3729  break;
3730  }
3731  (void) GetNextToken(q,&q,extent,token);
3732  break;
3733  }
3734  if (LocaleCompare("stroke-dashoffset",keyword) == 0)
3735  {
3736  (void) GetNextToken(q,&q,extent,token);
3737  graphic_context[n]->dash_offset=GetDrawValue(token,&next_token);
3738  if (token == next_token)
3739  ThrowPointExpectedException(image,token);
3740  break;
3741  }
3742  if (LocaleCompare("stroke-linecap",keyword) == 0)
3743  {
3744  ssize_t
3745  linecap;
3746 
3747  (void) GetNextToken(q,&q,extent,token);
3748  linecap=ParseCommandOption(MagickLineCapOptions,MagickFalse,token);
3749  if (linecap == -1)
3750  {
3751  status=MagickFalse;
3752  break;
3753  }
3754  graphic_context[n]->linecap=(LineCap) linecap;
3755  break;
3756  }
3757  if (LocaleCompare("stroke-linejoin",keyword) == 0)
3758  {
3759  ssize_t
3760  linejoin;
3761 
3762  (void) GetNextToken(q,&q,extent,token);
3763  linejoin=ParseCommandOption(MagickLineJoinOptions,MagickFalse,
3764  token);
3765  if (linejoin == -1)
3766  {
3767  status=MagickFalse;
3768  break;
3769  }
3770  graphic_context[n]->linejoin=(LineJoin) linejoin;
3771  break;
3772  }
3773  if (LocaleCompare("stroke-miterlimit",keyword) == 0)
3774  {
3775  (void) GetNextToken(q,&q,extent,token);
3776  graphic_context[n]->miterlimit=StringToUnsignedLong(token);
3777  break;
3778  }
3779  if (LocaleCompare("stroke-opacity",keyword) == 0)
3780  {
3781  double
3782  opacity;
3783 
3784  (void) GetNextToken(q,&q,extent,token);
3785  if (graphic_context[n]->clip_path != MagickFalse)
3786  break;
3787  factor=strchr(token,'%') != (char *) NULL ? 0.01 : 1.0;
3788  opacity=MagickMin(MagickMax(factor*
3789  GetDrawValue(token,&next_token),0.0),1.0);
3790  if (token == next_token)
3791  ThrowPointExpectedException(image,token);
3792  if (graphic_context[n]->compliance == SVGCompliance)
3793  graphic_context[n]->stroke_opacity*=(1.0-opacity);
3794  else
3795  graphic_context[n]->stroke_opacity=((MagickRealType) QuantumRange-
3796  graphic_context[n]->stroke_opacity)*(1.0-opacity);
3797  if (graphic_context[n]->stroke.opacity != TransparentOpacity)
3798  graphic_context[n]->stroke.opacity=(Quantum)
3799  graphic_context[n]->stroke_opacity;
3800  else
3801  graphic_context[n]->stroke.opacity=ClampToQuantum(
3802  (MagickRealType) QuantumRange*opacity);
3803  break;
3804  }
3805  if (LocaleCompare("stroke-width",keyword) == 0)
3806  {
3807  (void) GetNextToken(q,&q,extent,token);
3808  if (graphic_context[n]->clip_path != MagickFalse)
3809  break;
3810  graphic_context[n]->stroke_width=GetDrawValue(token,&next_token);
3811  if ((token == next_token) ||
3812  (graphic_context[n]->stroke_width < 0.0))
3813  ThrowPointExpectedException(image,token);
3814  break;
3815  }
3816  status=MagickFalse;
3817  break;
3818  }
3819  case 't':
3820  case 'T':
3821  {
3822  if (LocaleCompare("text",keyword) == 0)
3823  {
3824  primitive_type=TextPrimitive;
3825  cursor=0.0;
3826  break;
3827  }
3828  if (LocaleCompare("text-align",keyword) == 0)
3829  {
3830  ssize_t
3831  align;
3832 
3833  (void) GetNextToken(q,&q,extent,token);
3834  align=ParseCommandOption(MagickAlignOptions,MagickFalse,token);
3835  if (align == -1)
3836  {
3837  status=MagickFalse;
3838  break;
3839  }
3840  graphic_context[n]->align=(AlignType) align;
3841  break;
3842  }
3843  if (LocaleCompare("text-anchor",keyword) == 0)
3844  {
3845  ssize_t
3846  align;
3847 
3848  (void) GetNextToken(q,&q,extent,token);
3849  align=ParseCommandOption(MagickAlignOptions,MagickFalse,token);
3850  if (align == -1)
3851  {
3852  status=MagickFalse;
3853  break;
3854  }
3855  graphic_context[n]->align=(AlignType) align;
3856  break;
3857  }
3858  if (LocaleCompare("text-antialias",keyword) == 0)
3859  {
3860  (void) GetNextToken(q,&q,extent,token);
3861  graphic_context[n]->text_antialias=StringToLong(token) != 0 ?
3862  MagickTrue : MagickFalse;
3863  break;
3864  }
3865  if (LocaleCompare("text-undercolor",keyword) == 0)
3866  {
3867  (void) GetNextToken(q,&q,extent,token);
3868  status&=QueryColorDatabase(token,&graphic_context[n]->undercolor,
3869  &image->exception);
3870  break;
3871  }
3872  if (LocaleCompare("translate",keyword) == 0)
3873  {
3874  (void) GetNextToken(q,&q,extent,token);
3875  affine.tx=GetDrawValue(token,&next_token);
3876  if (token == next_token)
3877  ThrowPointExpectedException(image,token);
3878  (void) GetNextToken(q,&q,extent,token);
3879  if (*token == ',')
3880  (void) GetNextToken(q,&q,extent,token);
3881  affine.ty=GetDrawValue(token,&next_token);
3882  if (token == next_token)
3883  ThrowPointExpectedException(image,token);
3884  break;
3885  }
3886  status=MagickFalse;
3887  break;
3888  }
3889  case 'u':
3890  case 'U':
3891  {
3892  if (LocaleCompare("use",keyword) == 0)
3893  {
3894  const char
3895  *use;
3896 
3897  /*
3898  Get a macro from the MVG document, and "use" it here.
3899  */
3900  (void) GetNextToken(q,&q,extent,token);
3901  use=(const char *) GetValueFromSplayTree(macros,token);
3902  if (use != (const char *) NULL)
3903  {
3904  clone_info=CloneDrawInfo((ImageInfo *) NULL,graphic_context[n]);
3905  (void) CloneString(&clone_info->primitive,use);
3906  status=RenderMVGContent(image,clone_info,depth+1);
3907  clone_info=DestroyDrawInfo(clone_info);
3908  }
3909  break;
3910  }
3911  status=MagickFalse;
3912  break;
3913  }
3914  case 'v':
3915  case 'V':
3916  {
3917  if (LocaleCompare("viewbox",keyword) == 0)
3918  {
3919  (void) GetNextToken(q,&q,extent,token);
3920  graphic_context[n]->viewbox.x=CastDoubleToLong(ceil(
3921  GetDrawValue(token,&next_token)-0.5));
3922  if (token == next_token)
3923  ThrowPointExpectedException(image,token);
3924  (void) GetNextToken(q,&q,extent,token);
3925  if (*token == ',')
3926  (void) GetNextToken(q,&q,extent,token);
3927  graphic_context[n]->viewbox.y=CastDoubleToLong(ceil(
3928  GetDrawValue(token,&next_token)-0.5));
3929  if (token == next_token)
3930  ThrowPointExpectedException(image,token);
3931  (void) GetNextToken(q,&q,extent,token);
3932  if (*token == ',')
3933  (void) GetNextToken(q,&q,extent,token);
3934  graphic_context[n]->viewbox.width=CastDoubleToUnsigned(
3935  GetDrawValue(token,&next_token)+0.5);
3936  if (token == next_token)
3937  ThrowPointExpectedException(image,token);
3938  (void) GetNextToken(q,&q,extent,token);
3939  if (*token == ',')
3940  (void) GetNextToken(q,&q,extent,token);
3941  graphic_context[n]->viewbox.height=CastDoubleToUnsigned(
3942  GetDrawValue(token,&next_token)+0.5);
3943  if (token == next_token)
3944  ThrowPointExpectedException(image,token);
3945  break;
3946  }
3947  status=MagickFalse;
3948  break;
3949  }
3950  case 'w':
3951  case 'W':
3952  {
3953  if (LocaleCompare("word-spacing",keyword) == 0)
3954  {
3955  (void) GetNextToken(q,&q,extent,token);
3956  graphic_context[n]->interword_spacing=GetDrawValue(token,
3957  &next_token);
3958  if (token == next_token)
3959  ThrowPointExpectedException(image,token);
3960  break;
3961  }
3962  status=MagickFalse;
3963  break;
3964  }
3965  default:
3966  {
3967  status=MagickFalse;
3968  break;
3969  }
3970  }
3971  if (status == MagickFalse)
3972  break;
3973  if ((fabs(affine.sx-1.0) >= MagickEpsilon) ||
3974  (fabs(affine.rx) >= MagickEpsilon) || (fabs(affine.ry) >= MagickEpsilon) ||
3975  (fabs(affine.sy-1.0) >= MagickEpsilon) ||
3976  (fabs(affine.tx) >= MagickEpsilon) || (fabs(affine.ty) >= MagickEpsilon))
3977  {
3978  graphic_context[n]->affine.sx=current.sx*affine.sx+current.ry*affine.rx;
3979  graphic_context[n]->affine.rx=current.rx*affine.sx+current.sy*affine.rx;
3980  graphic_context[n]->affine.ry=current.sx*affine.ry+current.ry*affine.sy;
3981  graphic_context[n]->affine.sy=current.rx*affine.ry+current.sy*affine.sy;
3982  graphic_context[n]->affine.tx=current.sx*affine.tx+current.ry*affine.ty+
3983  current.tx;
3984  graphic_context[n]->affine.ty=current.rx*affine.tx+current.sy*affine.ty+
3985  current.ty;
3986  }
3987  if (primitive_type == UndefinedPrimitive)
3988  {
3989  if ((draw_info->debug != MagickFalse) && (q > p))
3990  (void) LogMagickEvent(DrawEvent,GetMagickModule()," %.*s",(int)
3991  (q-p-1),p);
3992  continue;
3993  }
3994  /*
3995  Parse the primitive attributes.
3996  */
3997  for (i=0; primitive_info[i].primitive != UndefinedPrimitive; i++)
3998  if (primitive_info[i].text != (char *) NULL)
3999  primitive_info[i].text=DestroyString(primitive_info[i].text);
4000  i=0;
4001  mvg_info.offset=i;
4002  j=0;
4003  primitive_info[0].point.x=0.0;
4004  primitive_info[0].point.y=0.0;
4005  primitive_info[0].coordinates=0;
4006  primitive_info[0].method=FloodfillMethod;
4007  primitive_info[0].closed_subpath=MagickFalse;
4008  for (x=0; *q != '\0'; x++)
4009  {
4010  /*
4011  Define points.
4012  */
4013  if (IsPoint(q) == MagickFalse)
4014  break;
4015  (void) GetNextToken(q,&q,extent,token);
4016  point.x=GetDrawValue(token,&next_token);
4017  if (token == next_token)
4018  ThrowPointExpectedException(image,token);
4019  (void) GetNextToken(q,&q,extent,token);
4020  if (*token == ',')
4021  (void) GetNextToken(q,&q,extent,token);
4022  point.y=GetDrawValue(token,&next_token);
4023  if (token == next_token)
4024  ThrowPointExpectedException(image,token);
4025  (void) GetNextToken(q,(const char **) NULL,extent,token);
4026  if (*token == ',')
4027  (void) GetNextToken(q,&q,extent,token);
4028  primitive_info[i].primitive=primitive_type;
4029  primitive_info[i].point=point;
4030  primitive_info[i].coordinates=0;
4031  primitive_info[i].method=FloodfillMethod;
4032  primitive_info[i].closed_subpath=MagickFalse;
4033  i++;
4034  mvg_info.offset=i;
4035  if (i < (ssize_t) number_points)
4036  continue;
4037  status&=CheckPrimitiveExtent(&mvg_info,(double) number_points);
4038  primitive_info=(*mvg_info.primitive_info);
4039  }
4040  if (status == MagickFalse)
4041  break;
4042  if (primitive_info[j].text != (char *) NULL)
4043  primitive_info[j].text=DestroyString(primitive_info[j].text);
4044  primitive_info[j].primitive=primitive_type;
4045  primitive_info[j].coordinates=(size_t) x;
4046  primitive_info[j].method=FloodfillMethod;
4047  primitive_info[j].closed_subpath=MagickFalse;
4048  /*
4049  Circumscribe primitive within a circle.
4050  */
4051  bounds.x1=primitive_info[j].point.x;
4052  bounds.y1=primitive_info[j].point.y;
4053  bounds.x2=primitive_info[j].point.x;
4054  bounds.y2=primitive_info[j].point.y;
4055  for (k=1; k < (ssize_t) primitive_info[j].coordinates; k++)
4056  {
4057  point=primitive_info[j+k].point;
4058  if (point.x < bounds.x1)
4059  bounds.x1=point.x;
4060  if (point.y < bounds.y1)
4061  bounds.y1=point.y;
4062  if (point.x > bounds.x2)
4063  bounds.x2=point.x;
4064  if (point.y > bounds.y2)
4065  bounds.y2=point.y;
4066  }
4067  /*
4068  Speculate how many points our primitive might consume.
4069  */
4070  coordinates=(double) primitive_info[j].coordinates;
4071  switch (primitive_type)
4072  {
4073  case RectanglePrimitive:
4074  {
4075  coordinates*=5.0;
4076  break;
4077  }
4078  case RoundRectanglePrimitive:
4079  {
4080  double
4081  alpha,
4082  beta,
4083  radius;
4084 
4085  alpha=bounds.x2-bounds.x1;
4086  beta=bounds.y2-bounds.y1;
4087  radius=hypot(alpha,beta);
4088  coordinates*=5.0;
4089  coordinates+=2.0*((size_t) ceil((double) MagickPI*radius))+6.0*
4090  BezierQuantum+360.0;
4091  break;
4092  }
4093  case BezierPrimitive:
4094  {
4095  coordinates=(BezierQuantum*(double) primitive_info[j].coordinates);
4096  break;
4097  }
4098  case PathPrimitive:
4099  {
4100  char
4101  *s,
4102  *t;
4103 
4104  (void) GetNextToken(q,&q,extent,token);
4105  coordinates=1.0;
4106  t=token;
4107  for (s=token; *s != '\0'; s=t)
4108  {
4109  double
4110  value;
4111 
4112  value=GetDrawValue(s,&t);
4113  (void) value;
4114  if (s == t)
4115  {
4116  t++;
4117  continue;
4118  }
4119  coordinates++;
4120  }
4121  for (s=token; *s != '\0'; s++)
4122  if (strspn(s,"AaCcQqSsTt") != 0)
4123  coordinates+=(20.0*BezierQuantum)+360.0;
4124  break;
4125  }
4126  default:
4127  break;
4128  }
4129  if (status == MagickFalse)
4130  break;
4131  if (((size_t) (i+coordinates)) >= number_points)
4132  {
4133  /*
4134  Resize based on speculative points required by primitive.
4135  */
4136  number_points+=coordinates+1;
4137  if (number_points < (size_t) coordinates)
4138  {
4139  (void) ThrowMagickException(&image->exception,GetMagickModule(),
4140  ResourceLimitError,"MemoryAllocationFailed","`%s'",
4141  image->filename);
4142  break;
4143  }
4144  mvg_info.offset=i;
4145  status&=CheckPrimitiveExtent(&mvg_info,(double) number_points);
4146  primitive_info=(*mvg_info.primitive_info);
4147  }
4148  status&=CheckPrimitiveExtent(&mvg_info,PrimitiveExtentPad);
4149  primitive_info=(*mvg_info.primitive_info);
4150  if (status == MagickFalse)
4151  break;
4152  mvg_info.offset=j;
4153  switch (primitive_type)
4154  {
4155  case PointPrimitive:
4156  default:
4157  {
4158  if (primitive_info[j].coordinates != 1)
4159  {
4160  status=MagickFalse;
4161  break;
4162  }
4163  status&=TracePoint(primitive_info+j,primitive_info[j].point);
4164  primitive_info=(*mvg_info.primitive_info);
4165  i=(ssize_t) (j+primitive_info[j].coordinates);
4166  break;
4167  }
4168  case LinePrimitive:
4169  {
4170  if (primitive_info[j].coordinates != 2)
4171  {
4172  status=MagickFalse;
4173  break;
4174  }
4175  status&=TraceLine(primitive_info+j,primitive_info[j].point,
4176  primitive_info[j+1].point);
4177  primitive_info=(*mvg_info.primitive_info);
4178  i=(ssize_t) (j+primitive_info[j].coordinates);
4179  break;
4180  }
4181  case RectanglePrimitive:
4182  {
4183  if (primitive_info[j].coordinates != 2)
4184  {
4185  status=MagickFalse;
4186  break;
4187  }
4188  status&=TraceRectangle(primitive_info+j,primitive_info[j].point,
4189  primitive_info[j+1].point);
4190  primitive_info=(*mvg_info.primitive_info);
4191  i=(ssize_t) (j+primitive_info[j].coordinates);
4192  break;
4193  }
4194  case RoundRectanglePrimitive:
4195  {
4196  if (primitive_info[j].coordinates != 3)
4197  {
4198  status=MagickFalse;
4199  break;
4200  }
4201  if ((primitive_info[j+2].point.x < 0.0) ||
4202  (primitive_info[j+2].point.y < 0.0))
4203  {
4204  status=MagickFalse;
4205  break;
4206  }
4207  if ((primitive_info[j+1].point.x-primitive_info[j].point.x) < 0.0)
4208  {
4209  status=MagickFalse;
4210  break;
4211  }
4212  if ((primitive_info[j+1].point.y-primitive_info[j].point.y) < 0.0)
4213  {
4214  status=MagickFalse;
4215  break;
4216  }
4217  status&=TraceRoundRectangle(&mvg_info,primitive_info[j].point,
4218  primitive_info[j+1].point,primitive_info[j+2].point);
4219  primitive_info=(*mvg_info.primitive_info);
4220  i=(ssize_t) (j+primitive_info[j].coordinates);
4221  break;
4222  }
4223  case ArcPrimitive:
4224  {
4225  if (primitive_info[j].coordinates != 3)
4226  {
4227  status=MagickFalse;
4228  break;
4229  }
4230  status&=TraceArc(&mvg_info,primitive_info[j].point,
4231  primitive_info[j+1].point,primitive_info[j+2].point);
4232  primitive_info=(*mvg_info.primitive_info);
4233  i=(ssize_t) (j+primitive_info[j].coordinates);
4234  break;
4235  }
4236  case EllipsePrimitive:
4237  {
4238  if (primitive_info[j].coordinates != 3)
4239  {
4240  status=MagickFalse;
4241  break;
4242  }
4243  if ((primitive_info[j+1].point.x < 0.0) ||
4244  (primitive_info[j+1].point.y < 0.0))
4245  {
4246  status=MagickFalse;
4247  break;
4248  }
4249  status&=TraceEllipse(&mvg_info,primitive_info[j].point,
4250  primitive_info[j+1].point,primitive_info[j+2].point);
4251  primitive_info=(*mvg_info.primitive_info);
4252  i=(ssize_t) (j+primitive_info[j].coordinates);
4253  break;
4254  }
4255  case CirclePrimitive:
4256  {
4257  if (primitive_info[j].coordinates != 2)
4258  {
4259  status=MagickFalse;
4260  break;
4261  }
4262  status&=TraceCircle(&mvg_info,primitive_info[j].point,
4263  primitive_info[j+1].point);
4264  primitive_info=(*mvg_info.primitive_info);
4265  i=(ssize_t) (j+primitive_info[j].coordinates);
4266  break;
4267  }
4268  case PolylinePrimitive:
4269  {
4270  if (primitive_info[j].coordinates < 1)
4271  {
4272  status=MagickFalse;
4273  break;
4274  }
4275  break;
4276  }
4277  case PolygonPrimitive:
4278  {
4279  if (primitive_info[j].coordinates < 3)
4280  {
4281  status=MagickFalse;
4282  break;
4283  }
4284  primitive_info[i]=primitive_info[j];
4285  primitive_info[i].coordinates=0;
4286  primitive_info[j].coordinates++;
4287  primitive_info[j].closed_subpath=MagickTrue;
4288  i++;
4289  break;
4290  }
4291  case BezierPrimitive:
4292  {
4293  if (primitive_info[j].coordinates < 3)
4294  {
4295  status=MagickFalse;
4296  break;
4297  }
4298  status&=TraceBezier(&mvg_info,primitive_info[j].coordinates);
4299  primitive_info=(*mvg_info.primitive_info);
4300  i=(ssize_t) (j+primitive_info[j].coordinates);
4301  break;
4302  }
4303  case PathPrimitive:
4304  {
4305  coordinates=(double) TracePath(image,&mvg_info,token);
4306  primitive_info=(*mvg_info.primitive_info);
4307  if (coordinates < 0.0)
4308  {
4309  status=MagickFalse;
4310  break;
4311  }
4312  i=(ssize_t) (j+coordinates);
4313  break;
4314  }
4315  case ColorPrimitive:
4316  case MattePrimitive:
4317  {
4318  ssize_t
4319  method;
4320 
4321  if (primitive_info[j].coordinates != 1)
4322  {
4323  status=MagickFalse;
4324  break;
4325  }
4326  (void) GetNextToken(q,&q,extent,token);
4327  method=ParseCommandOption(MagickMethodOptions,MagickFalse,token);
4328  if (method == -1)
4329  {
4330  status=MagickFalse;
4331  break;
4332  }
4333  primitive_info[j].method=(PaintMethod) method;
4334  break;
4335  }
4336  case TextPrimitive:
4337  {
4338  char
4339  geometry[MagickPathExtent];
4340 
4341  if (primitive_info[j].coordinates != 1)
4342  {
4343  status=MagickFalse;
4344  break;
4345  }
4346  if (*token != ',')
4347  (void) GetNextToken(q,&q,extent,token);
4348  (void) CloneString(&primitive_info[j].text,token);
4349  /*
4350  Compute text cursor offset.
4351  */
4352  clone_info=CloneDrawInfo((ImageInfo *) NULL,graphic_context[n]);
4353  if ((fabs(mvg_info.point.x-primitive_info->point.x) < MagickEpsilon) &&
4354  (fabs(mvg_info.point.y-primitive_info->point.y) < MagickEpsilon))
4355  {
4356  mvg_info.point=primitive_info->point;
4357  primitive_info->point.x+=cursor;
4358  }
4359  else
4360  {
4361  mvg_info.point=primitive_info->point;
4362  cursor=0.0;
4363  }
4364  (void) FormatLocaleString(geometry,MagickPathExtent,"%+f%+f",
4365  primitive_info->point.x,primitive_info->point.y);
4366  clone_info->render=MagickFalse;
4367  clone_info->text=AcquireString(token);
4368  status&=GetTypeMetrics(image,clone_info,&metrics);
4369  clone_info=DestroyDrawInfo(clone_info);
4370  cursor+=metrics.width;
4371  if (graphic_context[n]->compliance != SVGCompliance)
4372  cursor=0.0;
4373  break;
4374  }
4375  case ImagePrimitive:
4376  {
4377  if (primitive_info[j].coordinates != 2)
4378  {
4379  status=MagickFalse;
4380  break;
4381  }
4382  (void) GetNextToken(q,&q,extent,token);
4383  (void) CloneString(&primitive_info[j].text,token);
4384  break;
4385  }
4386  }
4387  mvg_info.offset=i;
4388  if (status == 0)
4389  break;
4390  primitive_info[i].primitive=UndefinedPrimitive;
4391  if ((draw_info->debug != MagickFalse) && (q > p))
4392  (void) LogMagickEvent(DrawEvent,GetMagickModule()," %.*s",(int) (q-p),p);
4393  /*
4394  Sanity check.
4395  */
4396  status&=CheckPrimitiveExtent(&mvg_info,ExpandAffine(
4397  &graphic_context[n]->affine));
4398  primitive_info=(*mvg_info.primitive_info);
4399  if (status == 0)
4400  break;
4401  status&=CheckPrimitiveExtent(&mvg_info,(double)
4402  graphic_context[n]->stroke_width);
4403  primitive_info=(*mvg_info.primitive_info);
4404  if (status == 0)
4405  break;
4406  if (i == 0)
4407  continue;
4408  /*
4409  Transform points.
4410  */
4411  for (i=0; primitive_info[i].primitive != UndefinedPrimitive; i++)
4412  {
4413  point=primitive_info[i].point;
4414  primitive_info[i].point.x=graphic_context[n]->affine.sx*point.x+
4415  graphic_context[n]->affine.ry*point.y+graphic_context[n]->affine.tx;
4416  primitive_info[i].point.y=graphic_context[n]->affine.rx*point.x+
4417  graphic_context[n]->affine.sy*point.y+graphic_context[n]->affine.ty;
4418  point=primitive_info[i].point;
4419  if (point.x < graphic_context[n]->bounds.x1)
4420  graphic_context[n]->bounds.x1=point.x;
4421  if (point.y < graphic_context[n]->bounds.y1)
4422  graphic_context[n]->bounds.y1=point.y;
4423  if (point.x > graphic_context[n]->bounds.x2)
4424  graphic_context[n]->bounds.x2=point.x;
4425  if (point.y > graphic_context[n]->bounds.y2)
4426  graphic_context[n]->bounds.y2=point.y;
4427  if (primitive_info[i].primitive == ImagePrimitive)
4428  break;
4429  if (i >= (ssize_t) number_points)
4430  ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
4431  }
4432  if (graphic_context[n]->render != MagickFalse)
4433  {
4434  if ((n != 0) && (graphic_context[n]->compliance != SVGCompliance) &&
4435  (graphic_context[n]->clip_mask != (char *) NULL) &&
4436  (LocaleCompare(graphic_context[n]->clip_mask,
4437  graphic_context[n-1]->clip_mask) != 0))
4438  {
4439  const char
4440  *clip_path;
4441 
4442  clip_path=(const char *) GetValueFromSplayTree(macros,
4443  graphic_context[n]->clip_mask);
4444  if (clip_path != (const char *) NULL)
4445  (void) SetImageArtifact(image,graphic_context[n]->clip_mask,
4446  clip_path);
4447  status&=DrawClipPath(image,graphic_context[n],
4448  graphic_context[n]->clip_mask);
4449  }
4450  status&=DrawPrimitive(image,graphic_context[n],primitive_info);
4451  }
4452  proceed=SetImageProgress(image,RenderImageTag,q-primitive,(MagickSizeType)
4453  primitive_extent);
4454  if (proceed == MagickFalse)
4455  break;
4456  if (status == 0)
4457  break;
4458  }
4459  if (draw_info->debug != MagickFalse)
4460  (void) LogMagickEvent(DrawEvent,GetMagickModule(),"end draw-image");
4461  /*
4462  Relinquish resources.
4463  */
4464  macros=DestroySplayTree(macros);
4465  token=DestroyString(token);
4466  if (primitive_info != (PrimitiveInfo *) NULL)
4467  {
4468  for (i=0; primitive_info[i].primitive != UndefinedPrimitive; i++)
4469  if (primitive_info[i].text != (char *) NULL)
4470  primitive_info[i].text=DestroyString(primitive_info[i].text);
4471  primitive_info=(PrimitiveInfo *) RelinquishMagickMemory(primitive_info);
4472  }
4473  primitive=DestroyString(primitive);
4474  for ( ; n >= 0; n--)
4475  graphic_context[n]=DestroyDrawInfo(graphic_context[n]);
4476  graphic_context=(DrawInfo **) RelinquishMagickMemory(graphic_context);
4477  if (status == MagickFalse)
4478  ThrowBinaryImageException(DrawError,
4479  "NonconformingDrawingPrimitiveDefinition",keyword);
4480  return(status != 0 ? MagickTrue : MagickFalse);
4481 }
4482 
4483 MagickExport MagickBooleanType DrawImage(Image *image,const DrawInfo *draw_info)
4484 {
4485  return(RenderMVGContent(image,draw_info,0));
4486 }
4487 
4488 /*
4489 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4490 % %
4491 % %
4492 % %
4493 % D r a w P a t t e r n P a t h %
4494 % %
4495 % %
4496 % %
4497 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4498 %
4499 % DrawPatternPath() draws a pattern.
4500 %
4501 % The format of the DrawPatternPath method is:
4502 %
4503 % MagickBooleanType DrawPatternPath(Image *image,const DrawInfo *draw_info,
4504 % const char *name,Image **pattern)
4505 %
4506 % A description of each parameter follows:
4507 %
4508 % o image: the image.
4509 %
4510 % o draw_info: the draw info.
4511 %
4512 % o name: the pattern name.
4513 %
4514 % o image: the image.
4515 %
4516 */
4517 MagickExport MagickBooleanType DrawPatternPath(Image *image,
4518  const DrawInfo *draw_info,const char *name,Image **pattern)
4519 {
4520  char
4521  property[MaxTextExtent];
4522 
4523  const char
4524  *geometry,
4525  *path,
4526  *type;
4527 
4528  DrawInfo
4529  *clone_info;
4530 
4531  ImageInfo
4532  *image_info;
4533 
4534  MagickBooleanType
4535  status;
4536 
4537  assert(image != (Image *) NULL);
4538  assert(image->signature == MagickCoreSignature);
4539  assert(draw_info != (const DrawInfo *) NULL);
4540  if (IsEventLogging() != MagickFalse)
4541  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
4542  assert(name != (const char *) NULL);
4543  (void) FormatLocaleString(property,MaxTextExtent,"%s",name);
4544  path=GetImageArtifact(image,property);
4545  if (path == (const char *) NULL)
4546  return(MagickFalse);
4547  (void) FormatLocaleString(property,MaxTextExtent,"%s-geometry",name);
4548  geometry=GetImageArtifact(image,property);
4549  if (geometry == (const char *) NULL)
4550  return(MagickFalse);
4551  if ((*pattern) != (Image *) NULL)
4552  *pattern=DestroyImage(*pattern);
4553  image_info=AcquireImageInfo();
4554  image_info->size=AcquireString(geometry);
4555  *pattern=AcquireImage(image_info);
4556  image_info=DestroyImageInfo(image_info);
4557  (void) QueryColorDatabase("#00000000",&(*pattern)->background_color,
4558  &image->exception);
4559  (void) SetImageBackgroundColor(*pattern);
4560  if (draw_info->debug != MagickFalse)
4561  (void) LogMagickEvent(DrawEvent,GetMagickModule(),
4562  "begin pattern-path %s %s",name,geometry);
4563  clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
4564  if (clone_info->fill_pattern != (Image *) NULL)
4565  clone_info->fill_pattern=DestroyImage(clone_info->fill_pattern);
4566  if (clone_info->stroke_pattern != (Image *) NULL)
4567  clone_info->stroke_pattern=DestroyImage(clone_info->stroke_pattern);
4568  (void) FormatLocaleString(property,MaxTextExtent,"%s-type",name);
4569  type=GetImageArtifact(image,property);
4570  if (type != (const char *) NULL)
4571  clone_info->gradient.type=(GradientType) ParseCommandOption(
4572  MagickGradientOptions,MagickFalse,type);
4573  (void) CloneString(&clone_info->primitive,path);
4574  status=RenderMVGContent(*pattern,clone_info,0);
4575  clone_info=DestroyDrawInfo(clone_info);
4576  if (draw_info->debug != MagickFalse)
4577  (void) LogMagickEvent(DrawEvent,GetMagickModule(),"end pattern-path");
4578  return(status);
4579 }
4580 
4581 /*
4582 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4583 % %
4584 % %
4585 % %
4586 + D r a w P o l y g o n P r i m i t i v e %
4587 % %
4588 % %
4589 % %
4590 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4591 %
4592 % DrawPolygonPrimitive() draws a polygon on the image.
4593 %
4594 % The format of the DrawPolygonPrimitive method is:
4595 %
4596 % MagickBooleanType DrawPolygonPrimitive(Image *image,
4597 % const DrawInfo *draw_info,const PrimitiveInfo *primitive_info)
4598 %
4599 % A description of each parameter follows:
4600 %
4601 % o image: the image.
4602 %
4603 % o draw_info: the draw info.
4604 %
4605 % o primitive_info: Specifies a pointer to a PrimitiveInfo structure.
4606 %
4607 */
4608 
4609 static PolygonInfo **DestroyPolygonTLS(PolygonInfo **polygon_info)
4610 {
4611  ssize_t
4612  i;
4613 
4614  assert(polygon_info != (PolygonInfo **) NULL);
4615  for (i=0; i < (ssize_t) GetMagickResourceLimit(ThreadResource); i++)
4616  if (polygon_info[i] != (PolygonInfo *) NULL)
4617  polygon_info[i]=DestroyPolygonInfo(polygon_info[i]);
4618  polygon_info=(PolygonInfo **) RelinquishMagickMemory(polygon_info);
4619  return(polygon_info);
4620 }
4621 
4622 static PolygonInfo **AcquirePolygonTLS(const DrawInfo *draw_info,
4623  const PrimitiveInfo *primitive_info,ExceptionInfo *exception)
4624 {
4625  PathInfo
4626  *magick_restrict path_info;
4627 
4628  PolygonInfo
4629  **polygon_info;
4630 
4631  size_t
4632  number_threads;
4633 
4634  number_threads=(size_t) GetMagickResourceLimit(ThreadResource);
4635  polygon_info=(PolygonInfo **) AcquireQuantumMemory(number_threads,
4636  sizeof(*polygon_info));
4637  if (polygon_info == (PolygonInfo **) NULL)
4638  {
4639  (void) ThrowMagickException(exception,GetMagickModule(),
4640  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
4641  return((PolygonInfo **) NULL);
4642  }
4643  (void) memset(polygon_info,0,number_threads*sizeof(*polygon_info));
4644  path_info=ConvertPrimitiveToPath(draw_info,primitive_info,exception);
4645  if (path_info == (PathInfo *) NULL)
4646  return(DestroyPolygonTLS(polygon_info));
4647  polygon_info[0]=ConvertPathToPolygon(path_info,exception);
4648  if (polygon_info[0] == (PolygonInfo *) NULL)
4649  {
4650  (void) ThrowMagickException(exception,GetMagickModule(),
4651  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
4652  return(DestroyPolygonTLS(polygon_info));
4653  }
4654  path_info=(PathInfo *) RelinquishMagickMemory(path_info);
4655  return(polygon_info);
4656 }
4657 
4658 static MagickBooleanType AcquirePolygonEdgesTLS(PolygonInfo **polygon_info,
4659  const size_t number_threads,ExceptionInfo *exception)
4660 {
4661  ssize_t
4662  i;
4663 
4664  for (i=1; i < (ssize_t) number_threads; i++)
4665  {
4666  EdgeInfo
4667  *edge_info;
4668 
4669  ssize_t
4670  j;
4671 
4672  polygon_info[i]=(PolygonInfo *) AcquireMagickMemory(
4673  sizeof(*polygon_info[i]));
4674  if (polygon_info[i] == (PolygonInfo *) NULL)
4675  {
4676  (void) ThrowMagickException(exception,GetMagickModule(),
4677  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
4678  return(MagickFalse);
4679  }
4680  polygon_info[i]->number_edges=0;
4681  edge_info=polygon_info[0]->edges;
4682  polygon_info[i]->edges=(EdgeInfo *) AcquireQuantumMemory(
4683  polygon_info[0]->number_edges,sizeof(*edge_info));
4684  if (polygon_info[i]->edges == (EdgeInfo *) NULL)
4685  {
4686  (void) ThrowMagickException(exception,GetMagickModule(),
4687  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
4688  return(MagickFalse);
4689  }
4690  (void) memcpy(polygon_info[i]->edges,edge_info,
4691  polygon_info[0]->number_edges*sizeof(*edge_info));
4692  for (j=0; j < (ssize_t) polygon_info[i]->number_edges; j++)
4693  polygon_info[i]->edges[j].points=(PointInfo *) NULL;
4694  polygon_info[i]->number_edges=polygon_info[0]->number_edges;
4695  for (j=0; j < (ssize_t) polygon_info[i]->number_edges; j++)
4696  {
4697  edge_info=polygon_info[0]->edges+j;
4698  polygon_info[i]->edges[j].points=(PointInfo *) AcquireQuantumMemory(
4699  edge_info->number_points,sizeof(*edge_info));
4700  if (polygon_info[i]->edges[j].points == (PointInfo *) NULL)
4701  {
4702  (void) ThrowMagickException(exception,GetMagickModule(),
4703  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
4704  return(MagickFalse);
4705  }
4706  (void) memcpy(polygon_info[i]->edges[j].points,edge_info->points,
4707  edge_info->number_points*sizeof(*edge_info->points));
4708  }
4709  }
4710  return(MagickTrue);
4711 }
4712 
4713 static size_t DestroyEdge(PolygonInfo *polygon_info,const ssize_t edge)
4714 {
4715  assert(edge < (ssize_t) polygon_info->number_edges);
4716  polygon_info->edges[edge].points=(PointInfo *) RelinquishMagickMemory(
4717  polygon_info->edges[edge].points);
4718  polygon_info->number_edges--;
4719  if (edge < (ssize_t) polygon_info->number_edges)
4720  (void) memmove(polygon_info->edges+edge,polygon_info->edges+edge+1,
4721  (size_t) (polygon_info->number_edges-edge)*sizeof(*polygon_info->edges));
4722  return(polygon_info->number_edges);
4723 }
4724 
4725 static double GetOpacityPixel(PolygonInfo *polygon_info,const double mid,
4726  const MagickBooleanType fill,const FillRule fill_rule,const ssize_t x,
4727  const ssize_t y,double *stroke_opacity)
4728 {
4729  double
4730  alpha,
4731  beta,
4732  distance,
4733  subpath_opacity;
4734 
4735  PointInfo
4736  delta;
4737 
4738  EdgeInfo
4739  *p;
4740 
4741  const PointInfo
4742  *q;
4743 
4744  ssize_t
4745  i;
4746 
4747  ssize_t
4748  j,
4749  winding_number;
4750 
4751  /*
4752  Compute fill & stroke opacity for this (x,y) point.
4753  */
4754  *stroke_opacity=0.0;
4755  subpath_opacity=0.0;
4756  p=polygon_info->edges;
4757  for (j=0; j < (ssize_t) polygon_info->number_edges; j++, p++)
4758  {
4759  if ((double) y <= (p->bounds.y1-mid-0.5))
4760  break;
4761  if ((double) y > (p->bounds.y2+mid+0.5))
4762  {
4763  p--;
4764  (void) DestroyEdge(polygon_info,j--);
4765  continue;
4766  }
4767  if (((double) x <= (p->bounds.x1-mid-0.5)) ||
4768  ((double) x > (p->bounds.x2+mid+0.5)))
4769  continue;
4770  i=(ssize_t) MagickMax((double) p->highwater,1.0);
4771  for ( ; i < (ssize_t) p->number_points; i++)
4772  {
4773  if ((double) y <= (p->points[i-1].y-mid-0.5))
4774  break;
4775  if ((double) y > (p->points[i].y+mid+0.5))
4776  continue;
4777  if (p->scanline != (double) y)
4778  {
4779  p->scanline=(double) y;
4780  p->highwater=(size_t) i;
4781  }
4782  /*
4783  Compute distance between a point and an edge.
4784  */
4785  q=p->points+i-1;
4786  delta.x=(q+1)->x-q->x;
4787  delta.y=(q+1)->y-q->y;
4788  beta=delta.x*(x-q->x)+delta.y*(y-q->y);
4789  if (beta <= 0.0)
4790  {
4791  delta.x=(double) x-q->x;
4792  delta.y=(double) y-q->y;
4793  distance=delta.x*delta.x+delta.y*delta.y;
4794  }
4795  else
4796  {
4797  alpha=delta.x*delta.x+delta.y*delta.y;
4798  if (beta >= alpha)
4799  {
4800  delta.x=(double) x-(q+1)->x;
4801  delta.y=(double) y-(q+1)->y;
4802  distance=delta.x*delta.x+delta.y*delta.y;
4803  }
4804  else
4805  {
4806  alpha=PerceptibleReciprocal(alpha);
4807  beta=delta.x*(y-q->y)-delta.y*(x-q->x);
4808  distance=alpha*beta*beta;
4809  }
4810  }
4811  /*
4812  Compute stroke & subpath opacity.
4813  */
4814  beta=0.0;
4815  if (p->ghostline == MagickFalse)
4816  {
4817  alpha=mid+0.5;
4818  if ((*stroke_opacity < 1.0) &&
4819  (distance <= ((alpha+0.25)*(alpha+0.25))))
4820  {
4821  alpha=mid-0.5;
4822  if (distance <= ((alpha+0.25)*(alpha+0.25)))
4823  *stroke_opacity=1.0;
4824  else
4825  {
4826  beta=1.0;
4827  if (fabs(distance-1.0) >= MagickEpsilon)
4828  beta=sqrt((double) distance);
4829  alpha=beta-mid-0.5;
4830  if (*stroke_opacity < ((alpha-0.25)*(alpha-0.25)))
4831  *stroke_opacity=(alpha-0.25)*(alpha-0.25);
4832  }
4833  }
4834  }
4835  if ((fill == MagickFalse) || (distance > 1.0) || (subpath_opacity >= 1.0))
4836  continue;
4837  if (distance <= 0.0)
4838  {
4839  subpath_opacity=1.0;
4840  continue;
4841  }
4842  if (distance > 1.0)
4843  continue;
4844  if (fabs(beta) < MagickEpsilon)
4845  {
4846  beta=1.0;
4847  if (fabs(distance-1.0) >= MagickEpsilon)
4848  beta=sqrt(distance);
4849  }
4850  alpha=beta-1.0;
4851  if (subpath_opacity < (alpha*alpha))
4852  subpath_opacity=alpha*alpha;
4853  }
4854  }
4855  /*
4856  Compute fill opacity.
4857  */
4858  if (fill == MagickFalse)
4859  return(0.0);
4860  if (subpath_opacity >= 1.0)
4861  return(1.0);
4862  /*
4863  Determine winding number.
4864  */
4865  winding_number=0;
4866  p=polygon_info->edges;
4867  for (j=0; j < (ssize_t) polygon_info->number_edges; j++, p++)
4868  {
4869  if ((double) y <= p->bounds.y1)
4870  break;
4871  if (((double) y > p->bounds.y2) || ((double) x <= p->bounds.x1))
4872  continue;
4873  if ((double) x > p->bounds.x2)
4874  {
4875  winding_number+=p->direction != 0 ? 1 : -1;
4876  continue;
4877  }
4878  i=(ssize_t) MagickMax((double) p->highwater,1.0);
4879  for ( ; i < (ssize_t) (p->number_points-1); i++)
4880  if ((double) y <= p->points[i].y)
4881  break;
4882  q=p->points+i-1;
4883  if ((((q+1)->x-q->x)*(y-q->y)) <= (((q+1)->y-q->y)*(x-q->x)))
4884  winding_number+=p->direction != 0 ? 1 : -1;
4885  }
4886  if (fill_rule != NonZeroRule)
4887  {
4888  if ((MagickAbsoluteValue(winding_number) & 0x01) != 0)
4889  return(1.0);
4890  }
4891  else
4892  if (MagickAbsoluteValue(winding_number) != 0)
4893  return(1.0);
4894  return(subpath_opacity);
4895 }
4896 
4897 static MagickBooleanType DrawPolygonPrimitive(Image *image,
4898  const DrawInfo *draw_info,const PrimitiveInfo *primitive_info)
4899 {
4900  typedef struct _ExtentInfo
4901  {
4902  ssize_t
4903  x1,
4904  y1,
4905  x2,
4906  y2;
4907  } ExtentInfo;
4908 
4909  CacheView
4910  *image_view;
4911 
4912  const char
4913  *artifact;
4914 
4915  double
4916  mid;
4917 
4919  *exception;
4920 
4921  ExtentInfo
4922  poly_extent;
4923 
4924  MagickBooleanType
4925  fill,
4926  status;
4927 
4928  PolygonInfo
4929  **magick_restrict polygon_info;
4930 
4931  EdgeInfo
4932  *p;
4933 
4934  SegmentInfo
4935  bounds;
4936 
4937  size_t
4938  number_threads = 1;
4939 
4940  ssize_t
4941  i,
4942  y;
4943 
4944  assert(image != (Image *) NULL);
4945  assert(image->signature == MagickCoreSignature);
4946  assert(draw_info != (DrawInfo *) NULL);
4947  assert(draw_info->signature == MagickCoreSignature);
4948  assert(primitive_info != (PrimitiveInfo *) NULL);
4949  if (IsEventLogging() != MagickFalse)
4950  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
4951  if (primitive_info->coordinates <= 1)
4952  return(MagickTrue);
4953  /*
4954  Compute bounding box.
4955  */
4956  polygon_info=AcquirePolygonTLS(draw_info,primitive_info,&image->exception);
4957  if (polygon_info == (PolygonInfo **) NULL)
4958  return(MagickFalse);
4959  if (draw_info->debug != MagickFalse)
4960  (void) LogMagickEvent(DrawEvent,GetMagickModule()," begin draw-polygon");
4961  fill=(primitive_info->method == FillToBorderMethod) ||
4962  (primitive_info->method == FloodfillMethod) ? MagickTrue : MagickFalse;
4963  mid=ExpandAffine(&draw_info->affine)*draw_info->stroke_width/2.0;
4964  bounds=polygon_info[0]->edges[0].bounds;
4965  artifact=GetImageArtifact(image,"draw:render-bounding-rectangles");
4966  if (IsStringTrue(artifact) != MagickFalse)
4967  (void) DrawBoundingRectangles(image,draw_info,polygon_info[0]);
4968  for (i=1; i < (ssize_t) polygon_info[0]->number_edges; i++)
4969  {
4970  p=polygon_info[0]->edges+i;
4971  if (p->bounds.x1 < bounds.x1)
4972  bounds.x1=p->bounds.x1;
4973  if (p->bounds.y1 < bounds.y1)
4974  bounds.y1=p->bounds.y1;
4975  if (p->bounds.x2 > bounds.x2)
4976  bounds.x2=p->bounds.x2;
4977  if (p->bounds.y2 > bounds.y2)
4978  bounds.y2=p->bounds.y2;
4979  }
4980  bounds.x1-=(mid+1.0);
4981  bounds.y1-=(mid+1.0);
4982  bounds.x2+=(mid+1.0);
4983  bounds.y2+=(mid+1.0);
4984  if ((bounds.x1 >= (double) image->columns) ||
4985  (bounds.y1 >= (double) image->rows) ||
4986  (bounds.x2 <= 0.0) || (bounds.y2 <= 0.0))
4987  {
4988  polygon_info=DestroyPolygonTLS(polygon_info);
4989  return(MagickTrue); /* virtual polygon */
4990  }
4991  bounds.x1=bounds.x1 < 0.0 ? 0.0 : bounds.x1 >= (double) image->columns-1.0 ?
4992  (double) image->columns-1.0 : bounds.x1;
4993  bounds.y1=bounds.y1 < 0.0 ? 0.0 : bounds.y1 >= (double) image->rows-1.0 ?
4994  (double) image->rows-1.0 : bounds.y1;
4995  bounds.x2=bounds.x2 < 0.0 ? 0.0 : bounds.x2 >= (double) image->columns-1.0 ?
4996  (double) image->columns-1.0 : bounds.x2;
4997  bounds.y2=bounds.y2 < 0.0 ? 0.0 : bounds.y2 >= (double) image->rows-1.0 ?
4998  (double) image->rows-1.0 : bounds.y2;
4999  poly_extent.x1=CastDoubleToLong(ceil(bounds.x1-0.5));
5000  poly_extent.y1=CastDoubleToLong(ceil(bounds.y1-0.5));
5001  poly_extent.x2=CastDoubleToLong(floor(bounds.x2+0.5));
5002  poly_extent.y2=CastDoubleToLong(floor(bounds.y2+0.5));
5003  number_threads=GetMagickNumberThreads(image,image,poly_extent.y2-
5004  poly_extent.y1+1,1);
5005  status=AcquirePolygonEdgesTLS(polygon_info,number_threads,&image->exception);
5006  if (status == MagickFalse)
5007  {
5008  polygon_info=DestroyPolygonTLS(polygon_info);
5009  return(status);
5010  }
5011  status=MagickTrue;
5012  exception=(&image->exception);
5013  image_view=AcquireAuthenticCacheView(image,exception);
5014  if ((primitive_info->coordinates == 1) ||
5015  (polygon_info[0]->number_edges == 0))
5016  {
5017  /*
5018  Draw point.
5019  */
5020 #if defined(MAGICKCORE_OPENMP_SUPPORT)
5021  #pragma omp parallel for schedule(static) shared(status) \
5022  num_threads(number_threads)
5023 #endif
5024  for (y=poly_extent.y1; y <= poly_extent.y2; y++)
5025  {
5026  MagickBooleanType
5027  sync;
5028 
5029  PixelPacket
5030  *magick_restrict q;
5031 
5032  ssize_t
5033  x;
5034 
5035  if (status == MagickFalse)
5036  continue;
5037  x=poly_extent.x1;
5038  q=GetCacheViewAuthenticPixels(image_view,x,y,(size_t) (poly_extent.x2-
5039  x+1),1,exception);
5040  if (q == (PixelPacket *) NULL)
5041  {
5042  status=MagickFalse;
5043  continue;
5044  }
5045  for ( ; x <= poly_extent.x2; x++)
5046  {
5047  if ((x == CastDoubleToLong(ceil(primitive_info->point.x-0.5))) &&
5048  (y == CastDoubleToLong(ceil(primitive_info->point.y-0.5))))
5049  (void) GetFillColor(draw_info,x-poly_extent.x1,y-poly_extent.y1,q);
5050  q++;
5051  }
5052  sync=SyncCacheViewAuthenticPixels(image_view,exception);
5053  if (sync == MagickFalse)
5054  status=MagickFalse;
5055  }
5056  image_view=DestroyCacheView(image_view);
5057  polygon_info=DestroyPolygonTLS(polygon_info);
5058  if (draw_info->debug != MagickFalse)
5059  (void) LogMagickEvent(DrawEvent,GetMagickModule(),
5060  " end draw-polygon");
5061  return(status);
5062  }
5063  /*
5064  Draw polygon or line.
5065  */
5066  poly_extent.y1=CastDoubleToLong(ceil(bounds.y1-0.5));
5067  poly_extent.y2=CastDoubleToLong(floor(bounds.y2+0.5));
5068 #if defined(MAGICKCORE_OPENMP_SUPPORT)
5069  #pragma omp parallel for schedule(static) shared(status) \
5070  num_threads(number_threads)
5071 #endif
5072  for (y=poly_extent.y1; y <= poly_extent.y2; y++)
5073  {
5074  const int
5075  id = GetOpenMPThreadId();
5076 
5077  PixelPacket
5078  fill_color,
5079  stroke_color;
5080 
5081  PixelPacket
5082  *magick_restrict q;
5083 
5084  ssize_t
5085  x;
5086 
5087  if (status == MagickFalse)
5088  continue;
5089  q=GetCacheViewAuthenticPixels(image_view,poly_extent.x1,y,(size_t)
5090  (poly_extent.x2-poly_extent.x1+1),1,exception);
5091  if (q == (PixelPacket *) NULL)
5092  {
5093  status=MagickFalse;
5094  continue;
5095  }
5096  for (x=poly_extent.x1; x <= poly_extent.x2; x++)
5097  {
5098  double
5099  fill_opacity,
5100  stroke_opacity;
5101 
5102  /*
5103  Fill and/or stroke.
5104  */
5105  fill_opacity=GetOpacityPixel(polygon_info[id],mid,fill,
5106  draw_info->fill_rule,x,y,&stroke_opacity);
5107  if (draw_info->stroke_antialias == MagickFalse)
5108  {
5109  fill_opacity=fill_opacity >= AntialiasThreshold ? 1.0 : 0.0;
5110  stroke_opacity=stroke_opacity >= AntialiasThreshold ? 1.0 : 0.0;
5111  }
5112  (void) GetFillColor(draw_info,x-poly_extent.x1,y-poly_extent.y1,
5113  &fill_color);
5114  fill_opacity=(double) ((MagickRealType) QuantumRange-fill_opacity*
5115  ((MagickRealType) QuantumRange-(MagickRealType) fill_color.opacity));
5116  MagickCompositeOver(&fill_color,(MagickRealType) fill_opacity,q,
5117  (MagickRealType) q->opacity,q);
5118  (void) GetStrokeColor(draw_info,x-poly_extent.x1,y-poly_extent.y1,
5119  &stroke_color);
5120  stroke_opacity=(double) ((MagickRealType) QuantumRange-stroke_opacity*
5121  ((MagickRealType) QuantumRange-(MagickRealType) stroke_color.opacity));
5122  MagickCompositeOver(&stroke_color,(MagickRealType) stroke_opacity,q,
5123  (MagickRealType) q->opacity,q);
5124  q++;
5125  }
5126  if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse)
5127  status=MagickFalse;
5128  }
5129  image_view=DestroyCacheView(image_view);
5130  polygon_info=DestroyPolygonTLS(polygon_info);
5131  if (draw_info->debug != MagickFalse)
5132  (void) LogMagickEvent(DrawEvent,GetMagickModule()," end draw-polygon");
5133  return(status);
5134 }
5135 
5136 /*
5137 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
5138 % %
5139 % %
5140 % %
5141 % D r a w P r i m i t i v e %
5142 % %
5143 % %
5144 % %
5145 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
5146 %
5147 % DrawPrimitive() draws a primitive (line, rectangle, ellipse) on the image.
5148 %
5149 % The format of the DrawPrimitive method is:
5150 %
5151 % MagickBooleanType DrawPrimitive(Image *image,const DrawInfo *draw_info,
5152 % PrimitiveInfo *primitive_info)
5153 %
5154 % A description of each parameter follows:
5155 %
5156 % o image: the image.
5157 %
5158 % o draw_info: the draw info.
5159 %
5160 % o primitive_info: Specifies a pointer to a PrimitiveInfo structure.
5161 %
5162 */
5163 static void LogPrimitiveInfo(const PrimitiveInfo *primitive_info)
5164 {
5165  const char
5166  *methods[] =
5167  {
5168  "point",
5169  "replace",
5170  "floodfill",
5171  "filltoborder",
5172  "reset",
5173  "?"
5174  };
5175 
5176  PointInfo
5177  p,
5178  q,
5179  point;
5180 
5181  ssize_t
5182  i,
5183  x;
5184 
5185  ssize_t
5186  coordinates,
5187  y;
5188 
5189  x=CastDoubleToLong(ceil(primitive_info->point.x-0.5));
5190  y=CastDoubleToLong(ceil(primitive_info->point.y-0.5));
5191  switch (primitive_info->primitive)
5192  {
5193  case PointPrimitive:
5194  {
5195  (void) LogMagickEvent(DrawEvent,GetMagickModule(),
5196  "PointPrimitive %.20g,%.20g %s",(double) x,(double) y,
5197  methods[primitive_info->method]);
5198  return;
5199  }
5200  case ColorPrimitive:
5201  {
5202  (void) LogMagickEvent(DrawEvent,GetMagickModule(),
5203  "ColorPrimitive %.20g,%.20g %s",(double) x,(double) y,
5204  methods[primitive_info->method]);
5205  return;
5206  }
5207  case MattePrimitive:
5208  {
5209  (void) LogMagickEvent(DrawEvent,GetMagickModule(),
5210  "MattePrimitive %.20g,%.20g %s",(double) x,(double) y,
5211  methods[primitive_info->method]);
5212  return;
5213  }
5214  case TextPrimitive:
5215  {
5216  (void) LogMagickEvent(DrawEvent,GetMagickModule(),
5217  "TextPrimitive %.20g,%.20g",(double) x,(double) y);
5218  return;
5219  }
5220  case ImagePrimitive:
5221  {
5222  (void) LogMagickEvent(DrawEvent,GetMagickModule(),
5223  "ImagePrimitive %.20g,%.20g",(double) x,(double) y);
5224  return;
5225  }
5226  default:
5227  break;
5228  }
5229  coordinates=0;
5230  p=primitive_info[0].point;
5231  q.x=(-1.0);
5232  q.y=(-1.0);
5233  for (i=0; primitive_info[i].primitive != UndefinedPrimitive; i++)
5234  {
5235  point=primitive_info[i].point;
5236  if (coordinates <= 0)
5237  {
5238  coordinates=(ssize_t) primitive_info[i].coordinates;
5239  (void) LogMagickEvent(DrawEvent,GetMagickModule(),
5240  " begin open (%.20g)",(double) coordinates);
5241  p=point;
5242  }
5243  point=primitive_info[i].point;
5244  if ((fabs(q.x-point.x) >= MagickEpsilon) ||
5245  (fabs(q.y-point.y) >= MagickEpsilon))
5246  (void) LogMagickEvent(DrawEvent,GetMagickModule(),
5247  " %.20g: %.18g,%.18g",(double) coordinates,point.x,point.y);
5248  else
5249  (void) LogMagickEvent(DrawEvent,GetMagickModule(),
5250  " %.20g: %g %g (duplicate)",(double) coordinates,point.x,point.y);
5251  q=point;
5252  coordinates--;
5253  if (coordinates > 0)
5254  continue;
5255  if ((fabs(p.x-point.x) >= MagickEpsilon) ||
5256  (fabs(p.y-point.y) >= MagickEpsilon))
5257  (void) LogMagickEvent(DrawEvent,GetMagickModule()," end last (%.20g)",
5258  (double) coordinates);
5259  else
5260  (void) LogMagickEvent(DrawEvent,GetMagickModule()," end open (%.20g)",
5261  (double) coordinates);
5262  }
5263 }
5264 
5265 MagickExport MagickBooleanType DrawPrimitive(Image *image,
5266  const DrawInfo *draw_info,const PrimitiveInfo *primitive_info)
5267 {
5268  CacheView
5269  *image_view;
5270 
5272  *exception;
5273 
5274  MagickStatusType
5275  status;
5276 
5277  ssize_t
5278  i,
5279  x;
5280 
5281  ssize_t
5282  y;
5283 
5284  if (draw_info->debug != MagickFalse)
5285  {
5286  (void) LogMagickEvent(DrawEvent,GetMagickModule(),
5287  " begin draw-primitive");
5288  (void) LogMagickEvent(DrawEvent,GetMagickModule(),
5289  " affine: %g,%g,%g,%g,%g,%g",draw_info->affine.sx,
5290  draw_info->affine.rx,draw_info->affine.ry,draw_info->affine.sy,
5291  draw_info->affine.tx,draw_info->affine.ty);
5292  }
5293  exception=(&image->exception);
5294  status=MagickTrue;
5295  if ((IsGrayColorspace(image->colorspace) != MagickFalse) &&
5296  ((IsPixelGray(&draw_info->fill) == MagickFalse) ||
5297  (IsPixelGray(&draw_info->stroke) == MagickFalse)))
5298  status=SetImageColorspace(image,sRGBColorspace);
5299  if (draw_info->compliance == SVGCompliance)
5300  {
5301  status&=SetImageClipMask(image,draw_info->clipping_mask);
5302  status&=SetImageMask(image,draw_info->composite_mask);
5303  }
5304  x=CastDoubleToLong(ceil(primitive_info->point.x-0.5));
5305  y=CastDoubleToLong(ceil(primitive_info->point.y-0.5));
5306  image_view=AcquireAuthenticCacheView(image,exception);
5307  switch (primitive_info->primitive)
5308  {
5309  case ColorPrimitive:
5310  {
5311  switch (primitive_info->method)
5312  {
5313  case PointMethod:
5314  default:
5315  {
5316  PixelPacket
5317  *q;
5318 
5319  q=GetCacheViewAuthenticPixels(image_view,x,y,1,1,exception);
5320  if (q == (PixelPacket *) NULL)
5321  break;
5322  (void) GetFillColor(draw_info,x,y,q);
5323  status&=SyncCacheViewAuthenticPixels(image_view,exception);
5324  break;
5325  }
5326  case ReplaceMethod:
5327  {
5328  PixelPacket
5329  target;
5330 
5331  status&=GetOneCacheViewVirtualPixel(image_view,x,y,&target,exception);
5332  for (y=0; y < (ssize_t) image->rows; y++)
5333  {
5334  PixelPacket
5335  *magick_restrict q;
5336 
5337  q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,
5338  exception);
5339  if (q == (PixelPacket *) NULL)
5340  break;
5341  for (x=0; x < (ssize_t) image->columns; x++)
5342  {
5343  if (IsColorSimilar(image,q,&target) == MagickFalse)
5344  {
5345  q++;
5346  continue;
5347  }
5348  (void) GetFillColor(draw_info,x,y,q);
5349  q++;
5350  }
5351  status&=SyncCacheViewAuthenticPixels(image_view,exception);
5352  if (status == MagickFalse)
5353  break;
5354  }
5355  break;
5356  }
5357  case FloodfillMethod:
5358  case FillToBorderMethod:
5359  {
5361  target;
5362 
5363  status&=GetOneVirtualMagickPixel(image,x,y,&target,exception);
5364  if (primitive_info->method == FillToBorderMethod)
5365  {
5366  target.red=(MagickRealType) draw_info->border_color.red;
5367  target.green=(MagickRealType) draw_info->border_color.green;
5368  target.blue=(MagickRealType) draw_info->border_color.blue;
5369  }
5370  status&=FloodfillPaintImage(image,DefaultChannels,draw_info,&target,x,
5371  y,primitive_info->method == FloodfillMethod ? MagickFalse :
5372  MagickTrue);
5373  break;
5374  }
5375  case ResetMethod:
5376  {
5377  for (y=0; y < (ssize_t) image->rows; y++)
5378  {
5379  PixelPacket
5380  *magick_restrict q;
5381 
5382  ssize_t
5383  x;
5384 
5385  q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,
5386  exception);
5387  if (q == (PixelPacket *) NULL)
5388  break;
5389  for (x=0; x < (ssize_t) image->columns; x++)
5390  {
5391  (void) GetFillColor(draw_info,x,y,q);
5392  q++;
5393  }
5394  status&=SyncCacheViewAuthenticPixels(image_view,exception);
5395  if (status == MagickFalse)
5396  break;
5397  }
5398  break;
5399  }
5400  }
5401  break;
5402  }
5403  case MattePrimitive:
5404  {
5405  if (image->matte == MagickFalse)
5406  status&=SetImageAlphaChannel(image,OpaqueAlphaChannel);
5407  switch (primitive_info->method)
5408  {
5409  case PointMethod:
5410  default:
5411  {
5412  PixelPacket
5413  pixel;
5414 
5415  PixelPacket
5416  *q;
5417 
5418  q=GetCacheViewAuthenticPixels(image_view,x,y,1,1,exception);
5419  if (q == (PixelPacket *) NULL)
5420  break;
5421  (void) GetFillColor(draw_info,x,y,&pixel);
5422  SetPixelOpacity(q,pixel.opacity);
5423  status&=SyncCacheViewAuthenticPixels(image_view,exception);
5424  break;
5425  }
5426  case ReplaceMethod:
5427  {
5428  PixelPacket
5429  pixel,
5430  target;
5431 
5432  status&=GetOneCacheViewVirtualPixel(image_view,x,y,&target,exception);
5433  for (y=0; y < (ssize_t) image->rows; y++)
5434  {
5435  PixelPacket
5436  *magick_restrict q;
5437 
5438  ssize_t
5439  x;
5440 
5441  q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,
5442  exception);
5443  if (q == (PixelPacket *) NULL)
5444  break;
5445  for (x=0; x < (ssize_t) image->columns; x++)
5446  {
5447  if (IsColorSimilar(image,q,&target) == MagickFalse)
5448  {
5449  q++;
5450  continue;
5451  }
5452  (void) GetFillColor(draw_info,x,y,&pixel);
5453  SetPixelOpacity(q,pixel.opacity);
5454  q++;
5455  }
5456  status&=SyncCacheViewAuthenticPixels(image_view,exception);
5457  if (status == MagickFalse)
5458  break;
5459  }
5460  break;
5461  }
5462  case FloodfillMethod:
5463  case FillToBorderMethod:
5464  {
5466  target;
5467 
5468  status&=GetOneVirtualMagickPixel(image,x,y,&target,exception);
5469  if (primitive_info->method == FillToBorderMethod)
5470  {
5471  target.red=(MagickRealType) draw_info->border_color.red;
5472  target.green=(MagickRealType) draw_info->border_color.green;
5473  target.blue=(MagickRealType) draw_info->border_color.blue;
5474  }
5475  status&=FloodfillPaintImage(image,OpacityChannel,draw_info,&target,x,
5476  y,primitive_info->method == FloodfillMethod ? MagickFalse :
5477  MagickTrue);
5478  break;
5479  }
5480  case ResetMethod:
5481  {
5482  PixelPacket
5483  pixel;
5484 
5485  for (y=0; y < (ssize_t) image->rows; y++)
5486  {
5487  PixelPacket
5488  *magick_restrict q;
5489 
5490  ssize_t
5491  x;
5492 
5493  q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,
5494  exception);
5495  if (q == (PixelPacket *) NULL)
5496  break;
5497  for (x=0; x < (ssize_t) image->columns; x++)
5498  {
5499  (void) GetFillColor(draw_info,x,y,&pixel);
5500  SetPixelOpacity(q,pixel.opacity);
5501  q++;
5502  }
5503  status&=SyncCacheViewAuthenticPixels(image_view,exception);
5504  if (status == MagickFalse)
5505  break;
5506  }
5507  break;
5508  }
5509  }
5510  break;
5511  }
5512  case ImagePrimitive:
5513  {
5514  AffineMatrix
5515  affine;
5516 
5517  char
5518  composite_geometry[MaxTextExtent];
5519 
5520  Image
5521  *composite_image,
5522  *composite_images;
5523 
5524  ImageInfo
5525  *clone_info;
5526 
5528  geometry;
5529 
5530  ssize_t
5531  x1,
5532  y1;
5533 
5534  if (primitive_info->text == (char *) NULL)
5535  break;
5536  clone_info=AcquireImageInfo();
5537  composite_images=(Image *) NULL;
5538  if (LocaleNCompare(primitive_info->text,"data:",5) == 0)
5539  composite_images=ReadInlineImage(clone_info,primitive_info->text,
5540  &image->exception);
5541  else
5542  if (*primitive_info->text != '\0')
5543  {
5544  const MagickInfo
5545  *magick_info;
5546 
5547  MagickStatusType
5548  path_status;
5549 
5550  struct stat
5551  attributes;
5552 
5553  /*
5554  Read composite image.
5555  */
5556  (void) CopyMagickString(clone_info->filename,primitive_info->text,
5557  MagickPathExtent);
5558  (void) SetImageInfo(clone_info,1,exception);
5559  magick_info=GetMagickInfo(clone_info->magick,exception);
5560  if ((magick_info != (const MagickInfo*) NULL) &&
5561  (LocaleCompare(magick_info->magick_module,"SVG") == 0))
5562  {
5563  (void) ThrowMagickException(exception,GetMagickModule(),
5564  CorruptImageError,"ImageTypeNotSupported","`%s'",
5565  clone_info->filename);
5566  clone_info=DestroyImageInfo(clone_info);
5567  break;
5568  }
5569  (void) CopyMagickString(clone_info->filename,primitive_info->text,
5570  MagickPathExtent);
5571  if (clone_info->size != (char *) NULL)
5572  clone_info->size=DestroyString(clone_info->size);
5573  if (clone_info->extract != (char *) NULL)
5574  clone_info->extract=DestroyString(clone_info->extract);
5575  path_status=GetPathAttributes(clone_info->filename,&attributes);
5576  if (path_status != MagickFalse)
5577  {
5578  if (S_ISCHR(attributes.st_mode) == 0)
5579  composite_images=ReadImage(clone_info,exception);
5580  else
5581  (void) ThrowMagickException(exception,GetMagickModule(),
5582  FileOpenError,"UnableToOpenFile","`%s'",
5583  clone_info->filename);
5584  }
5585  else
5586  if ((LocaleCompare(clone_info->magick,"ftp") != 0) &&
5587  (LocaleCompare(clone_info->magick,"http") != 0) &&
5588  (LocaleCompare(clone_info->magick,"https") != 0) &&
5589  (LocaleCompare(clone_info->magick,"vid") != 0))
5590  composite_images=ReadImage(clone_info,exception);
5591  else
5592  (void) ThrowMagickException(exception,GetMagickModule(),
5593  FileOpenError,"UnableToOpenFile","`%s'",clone_info->filename);
5594  }
5595  clone_info=DestroyImageInfo(clone_info);
5596  if (composite_images == (Image *) NULL)
5597  {
5598  status=0;
5599  break;
5600  }
5601  composite_image=RemoveFirstImageFromList(&composite_images);
5602  composite_images=DestroyImageList(composite_images);
5603  (void) SetImageProgressMonitor(composite_image,(MagickProgressMonitor)
5604  NULL,(void *) NULL);
5605  x1=CastDoubleToLong(ceil(primitive_info[1].point.x-0.5));
5606  y1=CastDoubleToLong(ceil(primitive_info[1].point.y-0.5));
5607  if (((x1 != 0L) && (x1 != (ssize_t) composite_image->columns)) ||
5608  ((y1 != 0L) && (y1 != (ssize_t) composite_image->rows)))
5609  {
5610  char
5611  geometry[MaxTextExtent];
5612 
5613  /*
5614  Resize image.
5615  */
5616  (void) FormatLocaleString(geometry,MaxTextExtent,"%gx%g!",
5617  primitive_info[1].point.x,primitive_info[1].point.y);
5618  composite_image->filter=image->filter;
5619  status&=TransformImage(&composite_image,(char *) NULL,geometry);
5620  }
5621  if (composite_image->matte == MagickFalse)
5622  status&=SetImageAlphaChannel(composite_image,OpaqueAlphaChannel);
5623  if (draw_info->opacity != OpaqueOpacity)
5624  status&=SetImageOpacity(composite_image,draw_info->opacity);
5625  SetGeometry(image,&geometry);
5626  image->gravity=draw_info->gravity;
5627  geometry.x=x;
5628  geometry.y=y;
5629  (void) FormatLocaleString(composite_geometry,MaxTextExtent,
5630  "%.20gx%.20g%+.20g%+.20g",(double) composite_image->columns,(double)
5631  composite_image->rows,(double) geometry.x,(double) geometry.y);
5632  (void) ParseGravityGeometry(image,composite_geometry,&geometry,
5633  &image->exception);
5634  affine=draw_info->affine;
5635  affine.tx=(double) geometry.x;
5636  affine.ty=(double) geometry.y;
5637  composite_image->interpolate=image->interpolate;
5638  if ((draw_info->compose == OverCompositeOp) ||
5639  (draw_info->compose == SrcOverCompositeOp))
5640  status&=DrawAffineImage(image,composite_image,&affine);
5641  else
5642  status&=CompositeImage(image,draw_info->compose,composite_image,
5643  geometry.x,geometry.y);
5644  composite_image=DestroyImage(composite_image);
5645  break;
5646  }
5647  case PointPrimitive:
5648  {
5649  PixelPacket
5650  fill_color;
5651 
5652  PixelPacket
5653  *q;
5654 
5655  if ((y < 0) || (y >= (ssize_t) image->rows))
5656  break;
5657  if ((x < 0) || (x >= (ssize_t) image->columns))
5658  break;
5659  q=GetCacheViewAuthenticPixels(image_view,x,y,1,1,exception);
5660  if (q == (PixelPacket *) NULL)
5661  break;
5662  (void) GetFillColor(draw_info,x,y,&fill_color);
5663  MagickCompositeOver(&fill_color,(MagickRealType) fill_color.opacity,q,
5664  (MagickRealType) q->opacity,q);
5665  status&=SyncCacheViewAuthenticPixels(image_view,exception);
5666  break;
5667  }
5668  case TextPrimitive:
5669  {
5670  char
5671  geometry[MaxTextExtent];
5672 
5673  DrawInfo
5674  *clone_info;
5675 
5676  if (primitive_info->text == (char *) NULL)
5677  break;
5678  clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
5679  (void) CloneString(&clone_info->text,primitive_info->text);
5680  (void) FormatLocaleString(geometry,MaxTextExtent,"%+f%+f",
5681  primitive_info->point.x,primitive_info->point.y);
5682  (void) CloneString(&clone_info->geometry,geometry);
5683  status&=AnnotateImage(image,clone_info);
5684  clone_info=DestroyDrawInfo(clone_info);
5685  break;
5686  }
5687  default:
5688  {
5689  double
5690  mid,
5691  scale;
5692 
5693  DrawInfo
5694  *clone_info;
5695 
5696  if (IsEventLogging() != MagickFalse)
5697  LogPrimitiveInfo(primitive_info);
5698  scale=ExpandAffine(&draw_info->affine);
5699  if ((draw_info->dash_pattern != (double *) NULL) &&
5700  (fabs(draw_info->dash_pattern[0]) >= MagickEpsilon) &&
5701  (fabs(scale*draw_info->stroke_width) >= MagickEpsilon) &&
5702  (draw_info->stroke.opacity != (Quantum) TransparentOpacity))
5703  {
5704  /*
5705  Draw dash polygon.
5706  */
5707  clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
5708  clone_info->stroke_width=0.0;
5709  clone_info->stroke.opacity=(Quantum) TransparentOpacity;
5710  status&=DrawPolygonPrimitive(image,clone_info,primitive_info);
5711  clone_info=DestroyDrawInfo(clone_info);
5712  if (status != MagickFalse)
5713  status&=DrawDashPolygon(draw_info,primitive_info,image);
5714  break;
5715  }
5716  mid=ExpandAffine(&draw_info->affine)*draw_info->stroke_width/2.0;
5717  if ((mid > 1.0) &&
5718  ((draw_info->stroke.opacity != (Quantum) TransparentOpacity) ||
5719  (draw_info->stroke_pattern != (Image *) NULL)))
5720  {
5721  double
5722  x,
5723  y;
5724 
5725  MagickBooleanType
5726  closed_path;
5727 
5728  /*
5729  Draw strokes while respecting line cap/join attributes.
5730  */
5731  closed_path=primitive_info[0].closed_subpath;
5732  i=(ssize_t) primitive_info[0].coordinates;
5733  x=fabs(primitive_info[i-1].point.x-primitive_info[0].point.x);
5734  y=fabs(primitive_info[i-1].point.y-primitive_info[0].point.y);
5735  if ((x < MagickEpsilon) && (y < MagickEpsilon))
5736  closed_path=MagickTrue;
5737  if ((((draw_info->linecap == RoundCap) ||
5738  (closed_path != MagickFalse)) &&
5739  (draw_info->linejoin == RoundJoin)) ||
5740  (primitive_info[i].primitive != UndefinedPrimitive))
5741  {
5742  status&=DrawPolygonPrimitive(image,draw_info,primitive_info);
5743  break;
5744  }
5745  clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
5746  clone_info->stroke_width=0.0;
5747  clone_info->stroke.opacity=(Quantum) TransparentOpacity;
5748  status&=DrawPolygonPrimitive(image,clone_info,primitive_info);
5749  clone_info=DestroyDrawInfo(clone_info);
5750  if (status != MagickFalse)
5751  status&=DrawStrokePolygon(image,draw_info,primitive_info);
5752  break;
5753  }
5754  status&=DrawPolygonPrimitive(image,draw_info,primitive_info);
5755  break;
5756  }
5757  }
5758  image_view=DestroyCacheView(image_view);
5759  if (draw_info->compliance == SVGCompliance)
5760  {
5761  status&=SetImageClipMask(image,(Image *) NULL);
5762  status&=SetImageMask(image,(Image *) NULL);
5763  }
5764  if (draw_info->debug != MagickFalse)
5765  (void) LogMagickEvent(DrawEvent,GetMagickModule()," end draw-primitive");
5766  return(status != 0 ? MagickTrue : MagickFalse);
5767 }
5768 
5769 /*
5770 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
5771 % %
5772 % %
5773 % %
5774 + D r a w S t r o k e P o l y g o n %
5775 % %
5776 % %
5777 % %
5778 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
5779 %
5780 % DrawStrokePolygon() draws a stroked polygon (line, rectangle, ellipse) on
5781 % the image while respecting the line cap and join attributes.
5782 %
5783 % The format of the DrawStrokePolygon method is:
5784 %
5785 % MagickBooleanType DrawStrokePolygon(Image *image,
5786 % const DrawInfo *draw_info,const PrimitiveInfo *primitive_info)
5787 %
5788 % A description of each parameter follows:
5789 %
5790 % o image: the image.
5791 %
5792 % o draw_info: the draw info.
5793 %
5794 % o primitive_info: Specifies a pointer to a PrimitiveInfo structure.
5795 %
5796 %
5797 */
5798 
5799 static MagickBooleanType DrawRoundLinecap(Image *image,
5800  const DrawInfo *draw_info,const PrimitiveInfo *primitive_info)
5801 {
5803  linecap[5];
5804 
5805  ssize_t
5806  i;
5807 
5808  for (i=0; i < 4; i++)
5809  linecap[i]=(*primitive_info);
5810  linecap[0].coordinates=4;
5811  linecap[1].point.x+=2.0*MagickEpsilon;
5812  linecap[2].point.x+=2.0*MagickEpsilon;
5813  linecap[2].point.y+=2.0*MagickEpsilon;
5814  linecap[3].point.y+=2.0*MagickEpsilon;
5815  linecap[4].primitive=UndefinedPrimitive;
5816  return(DrawPolygonPrimitive(image,draw_info,linecap));
5817 }
5818 
5819 static MagickBooleanType DrawStrokePolygon(Image *image,
5820  const DrawInfo *draw_info,const PrimitiveInfo *primitive_info)
5821 {
5822  DrawInfo
5823  *clone_info;
5824 
5825  MagickBooleanType
5826  closed_path;
5827 
5828  MagickStatusType
5829  status;
5830 
5832  *stroke_polygon;
5833 
5834  const PrimitiveInfo
5835  *p,
5836  *q;
5837 
5838  /*
5839  Draw stroked polygon.
5840  */
5841  if (draw_info->debug != MagickFalse)
5842  (void) LogMagickEvent(DrawEvent,GetMagickModule(),
5843  " begin draw-stroke-polygon");
5844  clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
5845  clone_info->fill=draw_info->stroke;
5846  if (clone_info->fill_pattern != (Image *) NULL)
5847  clone_info->fill_pattern=DestroyImage(clone_info->fill_pattern);
5848  if (clone_info->stroke_pattern != (Image *) NULL)
5849  clone_info->fill_pattern=CloneImage(clone_info->stroke_pattern,0,0,
5850  MagickTrue,&clone_info->stroke_pattern->exception);
5851  clone_info->stroke.opacity=(Quantum) TransparentOpacity;
5852  clone_info->stroke_width=0.0;
5853  clone_info->fill_rule=NonZeroRule;
5854  status=MagickTrue;
5855  for (p=primitive_info; p->primitive != UndefinedPrimitive; p+=p->coordinates)
5856  {
5857  if (p->coordinates == 1)
5858  continue;
5859  stroke_polygon=TraceStrokePolygon(draw_info,p,&image->exception);
5860  if (stroke_polygon == (PrimitiveInfo *) NULL)
5861  {
5862  status=0;
5863  break;
5864  }
5865  status&=DrawPolygonPrimitive(image,clone_info,stroke_polygon);
5866  stroke_polygon=(PrimitiveInfo *) RelinquishMagickMemory(stroke_polygon);
5867  if (status == 0)
5868  break;
5869  q=p+p->coordinates-1;
5870  closed_path=p->closed_subpath;
5871  if ((draw_info->linecap == RoundCap) && (closed_path == MagickFalse))
5872  {
5873  status&=DrawRoundLinecap(image,draw_info,p);
5874  status&=DrawRoundLinecap(image,draw_info,q);
5875  }
5876  }
5877  clone_info=DestroyDrawInfo(clone_info);
5878  if (draw_info->debug != MagickFalse)
5879  (void) LogMagickEvent(DrawEvent,GetMagickModule(),
5880  " end draw-stroke-polygon");
5881  return(status != 0 ? MagickTrue : MagickFalse);
5882 }
5883 
5884 /*
5885 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
5886 % %
5887 % %
5888 % %
5889 % G e t A f f i n e M a t r i x %
5890 % %
5891 % %
5892 % %
5893 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
5894 %
5895 % GetAffineMatrix() returns an AffineMatrix initialized to the identity
5896 % matrix.
5897 %
5898 % The format of the GetAffineMatrix method is:
5899 %
5900 % void GetAffineMatrix(AffineMatrix *affine_matrix)
5901 %
5902 % A description of each parameter follows:
5903 %
5904 % o affine_matrix: the affine matrix.
5905 %
5906 */
5907 MagickExport void GetAffineMatrix(AffineMatrix *affine_matrix)
5908 {
5909  assert(affine_matrix != (AffineMatrix *) NULL);
5910  if (IsEventLogging() != MagickFalse)
5911  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
5912  (void) memset(affine_matrix,0,sizeof(*affine_matrix));
5913  affine_matrix->sx=1.0;
5914  affine_matrix->sy=1.0;
5915 }
5916 
5917 /*
5918 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
5919 % %
5920 % %
5921 % %
5922 + G e t D r a w I n f o %
5923 % %
5924 % %
5925 % %
5926 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
5927 %
5928 % GetDrawInfo() initializes draw_info to default values from image_info.
5929 %
5930 % The format of the GetDrawInfo method is:
5931 %
5932 % void GetDrawInfo(const ImageInfo *image_info,DrawInfo *draw_info)
5933 %
5934 % A description of each parameter follows:
5935 %
5936 % o image_info: the image info..
5937 %
5938 % o draw_info: the draw info.
5939 %
5940 */
5941 MagickExport void GetDrawInfo(const ImageInfo *image_info,DrawInfo *draw_info)
5942 {
5943  char
5944  *next_token;
5945 
5946  const char
5947  *option;
5948 
5950  *exception;
5951 
5952  /*
5953  Initialize draw attributes.
5954  */
5955  assert(draw_info != (DrawInfo *) NULL);
5956  if (IsEventLogging() != MagickFalse)
5957  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
5958  (void) memset(draw_info,0,sizeof(*draw_info));
5959  draw_info->image_info=CloneImageInfo(image_info);
5960  GetAffineMatrix(&draw_info->affine);
5961  exception=AcquireExceptionInfo();
5962  (void) QueryColorDatabase("#000F",&draw_info->fill,exception);
5963  (void) QueryColorDatabase("#FFF0",&draw_info->stroke,exception);
5964  draw_info->stroke_antialias=draw_info->image_info->antialias;
5965  draw_info->stroke_width=1.0;
5966  draw_info->fill_rule=EvenOddRule;
5967  draw_info->opacity=OpaqueOpacity;
5968  draw_info->fill_opacity=OpaqueOpacity;
5969  draw_info->stroke_opacity=OpaqueOpacity;
5970  draw_info->linecap=ButtCap;
5971  draw_info->linejoin=MiterJoin;
5972  draw_info->miterlimit=10;
5973  draw_info->decorate=NoDecoration;
5974  if (draw_info->image_info->font != (char *) NULL)
5975  draw_info->font=AcquireString(draw_info->image_info->font);
5976  if (draw_info->image_info->density != (char *) NULL)
5977  draw_info->density=AcquireString(draw_info->image_info->density);
5978  draw_info->text_antialias=draw_info->image_info->antialias;
5979  draw_info->pointsize=12.0;
5980  if (fabs(draw_info->image_info->pointsize) >= MagickEpsilon)
5981  draw_info->pointsize=draw_info->image_info->pointsize;
5982  draw_info->undercolor.opacity=(Quantum) TransparentOpacity;
5983  draw_info->border_color=draw_info->image_info->border_color;
5984  draw_info->compose=OverCompositeOp;
5985  if (draw_info->image_info->server_name != (char *) NULL)
5986  draw_info->server_name=AcquireString(draw_info->image_info->server_name);
5987  draw_info->render=MagickTrue;
5988  draw_info->clip_path=MagickFalse;
5989  draw_info->debug=(GetLogEventMask() & (DrawEvent | AnnotateEvent)) != 0 ?
5990  MagickTrue : MagickFalse;
5991  option=GetImageOption(draw_info->image_info,"direction");
5992  if (option != (const char *) NULL)
5993  draw_info->direction=(DirectionType) ParseCommandOption(
5994  MagickDirectionOptions,MagickFalse,option);
5995  else
5996  draw_info->direction=UndefinedDirection;
5997  option=GetImageOption(draw_info->image_info,"encoding");
5998  if (option != (const char *) NULL)
5999  (void) CloneString(&draw_info->encoding,option);
6000  option=GetImageOption(draw_info->image_info,"family");
6001  if (option != (const char *) NULL)
6002  (void) CloneString(&draw_info->family,option);
6003  option=GetImageOption(draw_info->image_info,"fill");
6004  if (option != (const char *) NULL)
6005  (void) QueryColorDatabase(option,&draw_info->fill,exception);
6006  option=GetImageOption(draw_info->image_info,"gravity");
6007  if (option != (const char *) NULL)
6008  draw_info->gravity=(GravityType) ParseCommandOption(MagickGravityOptions,
6009  MagickFalse,option);
6010  option=GetImageOption(draw_info->image_info,"interline-spacing");
6011  if (option != (const char *) NULL)
6012  draw_info->interline_spacing=GetDrawValue(option,&next_token);
6013  option=GetImageOption(draw_info->image_info,"interword-spacing");
6014  if (option != (const char *) NULL)
6015  draw_info->interword_spacing=GetDrawValue(option,&next_token);
6016  option=GetImageOption(draw_info->image_info,"kerning");
6017  if (option != (const char *) NULL)
6018  draw_info->kerning=GetDrawValue(option,&next_token);
6019  option=GetImageOption(draw_info->image_info,"stroke");
6020  if (option != (const char *) NULL)
6021  (void) QueryColorDatabase(option,&draw_info->stroke,exception);
6022  option=GetImageOption(draw_info->image_info,"strokewidth");
6023  if (option != (const char *) NULL)
6024  draw_info->stroke_width=GetDrawValue(option,&next_token);
6025  option=GetImageOption(draw_info->image_info,"style");
6026  if (option != (const char *) NULL)
6027  draw_info->style=(StyleType) ParseCommandOption(MagickStyleOptions,
6028  MagickFalse,option);
6029  option=GetImageOption(draw_info->image_info,"undercolor");
6030  if (option != (const char *) NULL)
6031  (void) QueryColorDatabase(option,&draw_info->undercolor,exception);
6032  option=GetImageOption(draw_info->image_info,"weight");
6033  if (option != (const char *) NULL)
6034  {
6035  ssize_t
6036  weight;
6037 
6038  weight=ParseCommandOption(MagickWeightOptions,MagickFalse,option);
6039  if (weight == -1)
6040  weight=(ssize_t) StringToUnsignedLong(option);
6041  draw_info->weight=(size_t) weight;
6042  }
6043  exception=DestroyExceptionInfo(exception);
6044  draw_info->signature=MagickCoreSignature;
6045 }
6046 
6047 /*
6048 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
6049 % %
6050 % %
6051 % %
6052 + P e r m u t a t e %
6053 % %
6054 % %
6055 % %
6056 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
6057 %
6058 % Permutate() returns the permutation of the (n,k).
6059 %
6060 % The format of the Permutate method is:
6061 %
6062 % void Permutate(ssize_t n,ssize_t k)
6063 %
6064 % A description of each parameter follows:
6065 %
6066 % o n:
6067 %
6068 % o k:
6069 %
6070 %
6071 */
6072 static inline double Permutate(const ssize_t n,const ssize_t k)
6073 {
6074  double
6075  r;
6076 
6077  ssize_t
6078  i;
6079 
6080  r=1.0;
6081  for (i=k+1; i <= n; i++)
6082  r*=i;
6083  for (i=1; i <= (n-k); i++)
6084  r/=i;
6085  return(r);
6086 }
6087 
6088 /*
6089 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
6090 % %
6091 % %
6092 % %
6093 + T r a c e P r i m i t i v e %
6094 % %
6095 % %
6096 % %
6097 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
6098 %
6099 % TracePrimitive is a collection of methods for generating graphic
6100 % primitives such as arcs, ellipses, paths, etc.
6101 %
6102 */
6103 
6104 static MagickBooleanType TraceArc(MVGInfo *mvg_info,const PointInfo start,
6105  const PointInfo end,const PointInfo degrees)
6106 {
6107  PointInfo
6108  center,
6109  radius;
6110 
6111  center.x=0.5*(end.x+start.x);
6112  center.y=0.5*(end.y+start.y);
6113  radius.x=fabs(center.x-start.x);
6114  radius.y=fabs(center.y-start.y);
6115  return(TraceEllipse(mvg_info,center,radius,degrees));
6116 }
6117 
6118 static MagickBooleanType TraceArcPath(MVGInfo *mvg_info,const PointInfo start,
6119  const PointInfo end,const PointInfo arc,const double angle,
6120  const MagickBooleanType large_arc,const MagickBooleanType sweep)
6121 {
6122  double
6123  alpha,
6124  beta,
6125  delta,
6126  factor,
6127  gamma,
6128  theta;
6129 
6130  MagickStatusType
6131  status;
6132 
6133  PointInfo
6134  center,
6135  points[3],
6136  radii;
6137 
6138  double
6139  cosine,
6140  sine;
6141 
6143  *primitive_info;
6144 
6146  *p;
6147 
6148  ssize_t
6149  i;
6150 
6151  size_t
6152  arc_segments;
6153 
6154  ssize_t
6155  offset;
6156 
6157  offset=mvg_info->offset;
6158  primitive_info=(*mvg_info->primitive_info)+mvg_info->offset;
6159  primitive_info->coordinates=0;
6160  if ((fabs(start.x-end.x) < MagickEpsilon) &&
6161  (fabs(start.y-end.y) < MagickEpsilon))
6162  return(TracePoint(primitive_info,end));
6163  radii.x=fabs(arc.x);
6164  radii.y=fabs(arc.y);
6165  if ((radii.x < MagickEpsilon) || (radii.y < MagickEpsilon))
6166  return(TraceLine(primitive_info,start,end));
6167  cosine=cos(DegreesToRadians(fmod((double) angle,360.0)));
6168  sine=sin(DegreesToRadians(fmod((double) angle,360.0)));
6169  center.x=(double) (cosine*(end.x-start.x)/2+sine*(end.y-start.y)/2);
6170  center.y=(double) (cosine*(end.y-start.y)/2-sine*(end.x-start.x)/2);
6171  delta=(center.x*center.x)/(radii.x*radii.x)+(center.y*center.y)/
6172  (radii.y*radii.y);
6173  if (delta < MagickEpsilon)
6174  return(TraceLine(primitive_info,start,end));
6175  if (delta > 1.0)
6176  {
6177  radii.x*=sqrt((double) delta);
6178  radii.y*=sqrt((double) delta);
6179  }
6180  points[0].x=(double) (cosine*start.x/radii.x+sine*start.y/radii.x);
6181  points[0].y=(double) (cosine*start.y/radii.y-sine*start.x/radii.y);
6182  points[1].x=(double) (cosine*end.x/radii.x+sine*end.y/radii.x);
6183  points[1].y=(double) (cosine*end.y/radii.y-sine*end.x/radii.y);
6184  alpha=points[1].x-points[0].x;
6185  beta=points[1].y-points[0].y;
6186  if (fabs(alpha*alpha+beta*beta) < MagickEpsilon)
6187  return(TraceLine(primitive_info,start,end));
6188  factor=PerceptibleReciprocal(alpha*alpha+beta*beta)-0.25;
6189  if (factor <= 0.0)
6190  factor=0.0;
6191  else
6192  {
6193  factor=sqrt((double) factor);
6194  if (sweep == large_arc)
6195  factor=(-factor);
6196  }
6197  center.x=(double) ((points[0].x+points[1].x)/2-factor*beta);
6198  center.y=(double) ((points[0].y+points[1].y)/2+factor*alpha);
6199  alpha=atan2(points[0].y-center.y,points[0].x-center.x);
6200  theta=atan2(points[1].y-center.y,points[1].x-center.x)-alpha;
6201  if ((theta < 0.0) && (sweep != MagickFalse))
6202  theta+=2.0*MagickPI;
6203  else
6204  if ((theta > 0.0) && (sweep == MagickFalse))
6205  theta-=2.0*MagickPI;
6206  arc_segments=(size_t) CastDoubleToLong(ceil(fabs((double) (theta/(0.5*
6207  MagickPI+MagickEpsilon)))));
6208  p=primitive_info;
6209  status=MagickTrue;
6210  for (i=0; i < (ssize_t) arc_segments; i++)
6211  {
6212  beta=0.5*((alpha+(i+1)*theta/arc_segments)-(alpha+i*theta/arc_segments));
6213  gamma=(8.0/3.0)*sin(fmod((double) (0.5*beta),DegreesToRadians(360.0)))*
6214  sin(fmod((double) (0.5*beta),DegreesToRadians(360.0)))/
6215  sin(fmod((double) beta,DegreesToRadians(360.0)));
6216  points[0].x=(double) (center.x+cos(fmod((double) (alpha+(double) i*theta/
6217  arc_segments),DegreesToRadians(360.0)))-gamma*sin(fmod((double) (alpha+
6218  (double) i*theta/arc_segments),DegreesToRadians(360.0))));
6219  points[0].y=(double) (center.y+sin(fmod((double) (alpha+(double) i*theta/
6220  arc_segments),DegreesToRadians(360.0)))+gamma*cos(fmod((double) (alpha+
6221  (double) i*theta/arc_segments),DegreesToRadians(360.0))));
6222  points[2].x=(double) (center.x+cos(fmod((double) (alpha+(double) (i+1)*
6223  theta/arc_segments),DegreesToRadians(360.0))));
6224  points[2].y=(double) (center.y+sin(fmod((double) (alpha+(double) (i+1)*
6225  theta/arc_segments),DegreesToRadians(360.0))));
6226  points[1].x=(double) (points[2].x+gamma*sin(fmod((double) (alpha+(double)
6227  (i+1)*theta/arc_segments),DegreesToRadians(360.0))));
6228  points[1].y=(double) (points[2].y-gamma*cos(fmod((double) (alpha+(double)
6229  (i+1)*theta/arc_segments),DegreesToRadians(360.0))));
6230  p->point.x=(p == primitive_info) ? start.x : (p-1)->point.x;
6231  p->point.y=(p == primitive_info) ? start.y : (p-1)->point.y;
6232  (p+1)->point.x=(double) (cosine*radii.x*points[0].x-sine*radii.y*
6233  points[0].y);
6234  (p+1)->point.y=(double) (sine*radii.x*points[0].x+cosine*radii.y*
6235  points[0].y);
6236  (p+2)->point.x=(double) (cosine*radii.x*points[1].x-sine*radii.y*
6237  points[1].y);
6238  (p+2)->point.y=(double) (sine*radii.x*points[1].x+cosine*radii.y*
6239  points[1].y);
6240  (p+3)->point.x=(double) (cosine*radii.x*points[2].x-sine*radii.y*
6241  points[2].y);
6242  (p+3)->point.y=(double) (sine*radii.x*points[2].x+cosine*radii.y*
6243  points[2].y);
6244  if (i == (ssize_t) (arc_segments-1))
6245  (p+3)->point=end;
6246  status&=TraceBezier(mvg_info,4);
6247  if (status == 0)
6248  break;
6249  p=(*mvg_info->primitive_info)+mvg_info->offset;
6250  mvg_info->offset+=p->coordinates;
6251  p+=p->coordinates;
6252  }
6253  if (status == 0)
6254  return(MagickFalse);
6255  mvg_info->offset=offset;
6256  primitive_info=(*mvg_info->primitive_info)+mvg_info->offset;
6257  primitive_info->coordinates=(size_t) (p-primitive_info);
6258  primitive_info->closed_subpath=MagickFalse;
6259  for (i=0; i < (ssize_t) primitive_info->coordinates; i++)
6260  {
6261  p->primitive=primitive_info->primitive;
6262  p--;
6263  }
6264  return(MagickTrue);
6265 }
6266 
6267 static MagickBooleanType TraceBezier(MVGInfo *mvg_info,
6268  const size_t number_coordinates)
6269 {
6270  double
6271  alpha,
6272  *coefficients,
6273  weight;
6274 
6275  PointInfo
6276  end,
6277  point,
6278  *points;
6279 
6281  *primitive_info;
6282 
6284  *p;
6285 
6286  ssize_t
6287  i,
6288  j;
6289 
6290  size_t
6291  control_points,
6292  quantum;
6293 
6294  /*
6295  Allocate coefficients.
6296  */
6297  primitive_info=(*mvg_info->primitive_info)+mvg_info->offset;
6298  quantum=number_coordinates;
6299  for (i=0; i < (ssize_t) number_coordinates; i++)
6300  {
6301  for (j=i+1; j < (ssize_t) number_coordinates; j++)
6302  {
6303  alpha=fabs(primitive_info[j].point.x-primitive_info[i].point.x);
6304  if (alpha > (double) MAGICK_SSIZE_MAX)
6305  {
6306  (void) ThrowMagickException(mvg_info->exception,GetMagickModule(),
6307  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
6308  return(MagickFalse);
6309  }
6310  if (alpha > (double) quantum)
6311  quantum=(size_t) alpha;
6312  alpha=fabs(primitive_info[j].point.y-primitive_info[i].point.y);
6313  if (alpha > (double) MAGICK_SSIZE_MAX)
6314  {
6315  (void) ThrowMagickException(mvg_info->exception,GetMagickModule(),
6316  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
6317  return(MagickFalse);
6318  }
6319  if (alpha > (double) quantum)
6320  quantum=(size_t) alpha;
6321  }
6322  }
6323  coefficients=(double *) AcquireQuantumMemory(number_coordinates,
6324  sizeof(*coefficients));
6325  quantum=MagickMin(quantum/number_coordinates,BezierQuantum);
6326  points=(PointInfo *) AcquireQuantumMemory(quantum,number_coordinates*
6327  sizeof(*points));
6328  if ((coefficients == (double *) NULL) || (points == (PointInfo *) NULL))
6329  {
6330  if (points != (PointInfo *) NULL)
6331  points=(PointInfo *) RelinquishMagickMemory(points);
6332  if (coefficients != (double *) NULL)
6333  coefficients=(double *) RelinquishMagickMemory(coefficients);
6334  (void) ThrowMagickException(mvg_info->exception,GetMagickModule(),
6335  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
6336  return(MagickFalse);
6337  }
6338  control_points=quantum*number_coordinates;
6339  if (CheckPrimitiveExtent(mvg_info,(double) control_points+1) == MagickFalse)
6340  {
6341  points=(PointInfo *) RelinquishMagickMemory(points);
6342  coefficients=(double *) RelinquishMagickMemory(coefficients);
6343  return(MagickFalse);
6344  }
6345  primitive_info=(*mvg_info->primitive_info)+mvg_info->offset;
6346  /*
6347  Compute bezier points.
6348  */
6349  end=primitive_info[number_coordinates-1].point;
6350  for (i=0; i < (ssize_t) number_coordinates; i++)
6351  coefficients[i]=Permutate((ssize_t) number_coordinates-1,i);
6352  weight=0.0;
6353  for (i=0; i < (ssize_t) control_points; i++)
6354  {
6355  p=primitive_info;
6356  point.x=0.0;
6357  point.y=0.0;
6358  alpha=pow((double) (1.0-weight),(double) number_coordinates-1.0);
6359  for (j=0; j < (ssize_t) number_coordinates; j++)
6360  {
6361  point.x+=alpha*coefficients[j]*p->point.x;
6362  point.y+=alpha*coefficients[j]*p->point.y;
6363  alpha*=weight/(1.0-weight);
6364  p++;
6365  }
6366  points[i]=point;
6367  weight+=1.0/control_points;
6368  }
6369  /*
6370  Bezier curves are just short segmented polys.
6371  */
6372  p=primitive_info;
6373  for (i=0; i < (ssize_t) control_points; i++)
6374  {
6375  if (TracePoint(p,points[i]) == MagickFalse)
6376  {
6377  points=(PointInfo *) RelinquishMagickMemory(points);
6378  coefficients=(double *) RelinquishMagickMemory(coefficients);
6379  return(MagickFalse);
6380  }
6381  p+=p->coordinates;
6382  }
6383  if (TracePoint(p,end) == MagickFalse)
6384  {
6385  points=(PointInfo *) RelinquishMagickMemory(points);
6386  coefficients=(double *) RelinquishMagickMemory(coefficients);
6387  return(MagickFalse);
6388  }
6389  p+=p->coordinates;
6390  primitive_info->coordinates=(size_t) (p-primitive_info);
6391  primitive_info->closed_subpath=MagickFalse;
6392  for (i=0; i < (ssize_t) primitive_info->coordinates; i++)
6393  {
6394  p->primitive=primitive_info->primitive;
6395  p--;
6396  }
6397  points=(PointInfo *) RelinquishMagickMemory(points);
6398  coefficients=(double *) RelinquishMagickMemory(coefficients);
6399  return(MagickTrue);
6400 }
6401 
6402 static MagickBooleanType TraceCircle(MVGInfo *mvg_info,const PointInfo start,
6403  const PointInfo end)
6404 {
6405  double
6406  alpha,
6407  beta,
6408  radius;
6409 
6410  PointInfo
6411  offset,
6412  degrees;
6413 
6414  alpha=end.x-start.x;
6415  beta=end.y-start.y;
6416  radius=hypot((double) alpha,(double) beta);
6417  offset.x=(double) radius;
6418  offset.y=(double) radius;
6419  degrees.x=0.0;
6420  degrees.y=360.0;
6421  return(TraceEllipse(mvg_info,start,offset,degrees));
6422 }
6423 
6424 static MagickBooleanType TraceEllipse(MVGInfo *mvg_info,const PointInfo center,
6425  const PointInfo radii,const PointInfo arc)
6426 {
6427  double
6428  coordinates,
6429  delta,
6430  step,
6431  x,
6432  y;
6433 
6434  PointInfo
6435  angle,
6436  point;
6437 
6439  *primitive_info;
6440 
6442  *p;
6443 
6444  ssize_t
6445  i;
6446 
6447  /*
6448  Ellipses are just short segmented polys.
6449  */
6450  primitive_info=(*mvg_info->primitive_info)+mvg_info->offset;
6451  primitive_info->coordinates=0;
6452  if ((fabs(radii.x) < MagickEpsilon) || (fabs(radii.y) < MagickEpsilon))
6453  return(MagickTrue);
6454  delta=PerceptibleReciprocal(MagickMax(radii.x,radii.y));
6455  step=MagickPI/(MagickPI*PerceptibleReciprocal(delta))/8.0;
6456  angle.x=DegreesToRadians(arc.x);
6457  y=arc.y;
6458  while (y < arc.x)
6459  y+=360.0;
6460  angle.y=DegreesToRadians(y);
6461  coordinates=ceil((angle.y-angle.x)/step+1.0);
6462  if (CheckPrimitiveExtent(mvg_info,coordinates+1) == MagickFalse)
6463  return(MagickFalse);
6464  i=0;
6465  primitive_info=(*mvg_info->primitive_info)+mvg_info->offset;
6466  for (p=primitive_info; angle.x < angle.y; angle.x+=step)
6467  {
6468  point.x=cos(fmod(angle.x,DegreesToRadians(360.0)))*radii.x+center.x;
6469  point.y=sin(fmod(angle.x,DegreesToRadians(360.0)))*radii.y+center.y;
6470  if (i++ >= (ssize_t) coordinates)
6471  break;
6472  if (TracePoint(p,point) == MagickFalse)
6473  return(MagickFalse);
6474  p+=p->coordinates;
6475  }
6476  point.x=cos(fmod(angle.y,DegreesToRadians(360.0)))*radii.x+center.x;
6477  point.y=sin(fmod(angle.y,DegreesToRadians(360.0)))*radii.y+center.y;
6478  if (TracePoint(p,point) == MagickFalse)
6479  return(MagickFalse);
6480  p+=p->coordinates;
6481  primitive_info->coordinates=(size_t) (p-primitive_info);
6482  primitive_info->closed_subpath=MagickFalse;
6483  x=fabs(primitive_info[0].point.x-
6484  primitive_info[primitive_info->coordinates-1].point.x);
6485  y=fabs(primitive_info[0].point.y-
6486  primitive_info[primitive_info->coordinates-1].point.y);
6487  if ((x < MagickEpsilon) && (y < MagickEpsilon))
6488  primitive_info->closed_subpath=MagickTrue;
6489  for (i=0; i < (ssize_t) primitive_info->coordinates; i++)
6490  {
6491  p->primitive=primitive_info->primitive;
6492  p--;
6493  }
6494  return(MagickTrue);
6495 }
6496 
6497 static MagickBooleanType TraceLine(PrimitiveInfo *primitive_info,
6498  const PointInfo start,const PointInfo end)
6499 {
6500  if (TracePoint(primitive_info,start) == MagickFalse)
6501  return(MagickFalse);
6502  if (TracePoint(primitive_info+1,end) == MagickFalse)
6503  return(MagickFalse);
6504  (primitive_info+1)->primitive=primitive_info->primitive;
6505  primitive_info->coordinates=2;
6506  primitive_info->closed_subpath=MagickFalse;
6507  return(MagickTrue);
6508 }
6509 
6510 static ssize_t TracePath(Image *image,MVGInfo *mvg_info,const char *path)
6511 {
6512  char
6513  *next_token,
6514  token[MaxTextExtent] = "";
6515 
6516  const char
6517  *p;
6518 
6519  double
6520  x,
6521  y;
6522 
6523  int
6524  attribute,
6525  last_attribute;
6526 
6527  MagickStatusType
6528  status;
6529 
6530  PointInfo
6531  end = {0.0, 0.0},
6532  points[4] = { {0.0, 0.0}, {0.0, 0.0}, {0.0, 0.0}, {0.0, 0.0} },
6533  point = {0.0, 0.0},
6534  start = {0.0, 0.0};
6535 
6537  *primitive_info;
6538 
6539  PrimitiveType
6540  primitive_type;
6541 
6543  *q;
6544 
6545  ssize_t
6546  i;
6547 
6548  size_t
6549  number_coordinates,
6550  z_count;
6551 
6552  ssize_t
6553  subpath_offset;
6554 
6555  subpath_offset=mvg_info->offset;
6556  primitive_info=(*mvg_info->primitive_info)+mvg_info->offset;
6557  status=MagickTrue;
6558  attribute=0;
6559  number_coordinates=0;
6560  z_count=0;
6561  *token='\0';
6562  primitive_type=primitive_info->primitive;
6563  q=primitive_info;
6564  for (p=path; *p != '\0'; )
6565  {
6566  if (status == MagickFalse)
6567  break;
6568  while (isspace((int) ((unsigned char) *p)) != 0)
6569  p++;
6570  if (*p == '\0')
6571  break;
6572  last_attribute=attribute;
6573  attribute=(int) (*p++);
6574  switch (attribute)
6575  {
6576  case 'a':
6577  case 'A':
6578  {
6579  double
6580  angle = 0.0;
6581 
6582  MagickBooleanType
6583  large_arc = MagickFalse,
6584  sweep = MagickFalse;
6585 
6586  PointInfo
6587  arc = {0.0, 0.0};
6588 
6589  /*
6590  Elliptical arc.
6591  */
6592  do
6593  {
6594  (void) GetNextToken(p,&p,MaxTextExtent,token);
6595  if (*token == ',')
6596  (void) GetNextToken(p,&p,MaxTextExtent,token);
6597  arc.x=GetDrawValue(token,&next_token);
6598  if (token == next_token)
6599  ThrowPointExpectedException(image,token);
6600  (void) GetNextToken(p,&p,MaxTextExtent,token);
6601  if (*token == ',')
6602  (void) GetNextToken(p,&p,MaxTextExtent,token);
6603  arc.y=GetDrawValue(token,&next_token);
6604  if (token == next_token)
6605  ThrowPointExpectedException(image,token);
6606  (void) GetNextToken(p,&p,MaxTextExtent,token);
6607  if (*token == ',')
6608  (void) GetNextToken(p,&p,MaxTextExtent,token);
6609  angle=GetDrawValue(token,&next_token);
6610  if (token == next_token)
6611  ThrowPointExpectedException(image,token);
6612  (void) GetNextToken(p,&p,MaxTextExtent,token);
6613  if (*token == ',')
6614  (void) GetNextToken(p,&p,MaxTextExtent,token);
6615  large_arc=StringToLong(token) != 0 ? MagickTrue : MagickFalse;
6616  (void) GetNextToken(p,&p,MaxTextExtent,token);
6617  if (*token == ',')
6618  (void) GetNextToken(p,&p,MaxTextExtent,token);
6619  sweep=StringToLong(token) != 0 ? MagickTrue : MagickFalse;
6620  if (*token == ',')
6621  (void) GetNextToken(p,&p,MaxTextExtent,token);
6622  (void) GetNextToken(p,&p,MaxTextExtent,token);
6623  if (*token == ',')
6624  (void) GetNextToken(p,&p,MaxTextExtent,token);
6625  x=GetDrawValue(token,&next_token);
6626  if (token == next_token)
6627  ThrowPointExpectedException(image,token);
6628  (void) GetNextToken(p,&p,MaxTextExtent,token);
6629  if (*token == ',')
6630  (void) GetNextToken(p,&p,MaxTextExtent,token);
6631  y=GetDrawValue(token,&next_token);
6632  if (token == next_token)
6633  ThrowPointExpectedException(image,token);
6634  end.x=(double) (attribute == (int) 'A' ? x : point.x+x);
6635  end.y=(double) (attribute == (int) 'A' ? y : point.y+y);
6636  status&=TraceArcPath(mvg_info,point,end,arc,angle,large_arc,sweep);
6637  q=(*mvg_info->primitive_info)+mvg_info->offset;
6638  mvg_info->offset+=q->coordinates;
6639  q+=q->coordinates;
6640  point=end;
6641  while (isspace((int) ((unsigned char) *p)) != 0)
6642  p++;
6643  if (*p == ',')
6644  p++;
6645  } while (IsPoint(p) != MagickFalse);
6646  break;
6647  }
6648  case 'c':
6649  case 'C':
6650  {
6651  /*
6652  Cubic Bézier curve.
6653  */
6654  do
6655  {
6656  points[0]=point;
6657  for (i=1; i < 4; i++)
6658  {
6659  (void) GetNextToken(p,&p,MaxTextExtent,token);
6660  if (*token == ',')
6661  (void) GetNextToken(p,&p,MaxTextExtent,token);
6662  x=GetDrawValue(token,&next_token);
6663  if (token == next_token)
6664  ThrowPointExpectedException(image,token);
6665  (void) GetNextToken(p,&p,MaxTextExtent,token);
6666  if (*token == ',')
6667  (void) GetNextToken(p,&p,MaxTextExtent,token);
6668  y=GetDrawValue(token,&next_token);
6669  if (token == next_token)
6670  ThrowPointExpectedException(image,token);
6671  end.x=(double) (attribute == (int) 'C' ? x : point.x+x);
6672  end.y=(double) (attribute == (int) 'C' ? y : point.y+y);
6673  points[i]=end;
6674  }
6675  for (i=0; i < 4; i++)
6676  (q+i)->point=points[i];
6677  if (TraceBezier(mvg_info,4) == MagickFalse)
6678  return(-1);
6679  q=(*mvg_info->primitive_info)+mvg_info->offset;
6680  mvg_info->offset+=q->coordinates;
6681  q+=q->coordinates;
6682  point=end;
6683  while (isspace((int) ((unsigned char) *p)) != 0)
6684  p++;
6685  if (*p == ',')
6686  p++;
6687  } while (IsPoint(p) != MagickFalse);
6688  break;
6689  }
6690  case 'H':
6691  case 'h':
6692  {
6693  do
6694  {
6695  (void) GetNextToken(p,&p,MaxTextExtent,token);
6696  if (*token == ',')
6697  (void) GetNextToken(p,&p,MaxTextExtent,token);
6698  x=GetDrawValue(token,&next_token);
6699  if (token == next_token)
6700  ThrowPointExpectedException(image,token);
6701  point.x=(double) (attribute == (int) 'H' ? x: point.x+x);
6702  if (CheckPrimitiveExtent(mvg_info,PrimitiveExtentPad) == MagickFalse)
6703  return(-1);
6704  q=(*mvg_info->primitive_info)+mvg_info->offset;
6705  if (TracePoint(q,point) == MagickFalse)
6706  return(-1);
6707  mvg_info->offset+=q->coordinates;
6708  q+=q->coordinates;
6709  while (isspace((int) ((unsigned char) *p)) != 0)
6710  p++;
6711  if (*p == ',')
6712  p++;
6713  } while (IsPoint(p) != MagickFalse);
6714  break;
6715  }
6716  case 'l':
6717  case 'L':
6718  {
6719  /*
6720  Line to.
6721  */
6722  do
6723  {
6724  (void) GetNextToken(p,&p,MaxTextExtent,token);
6725  if (*token == ',')
6726  (void) GetNextToken(p,&p,MaxTextExtent,token);
6727  x=GetDrawValue(token,&next_token);
6728  if (token == next_token)
6729  ThrowPointExpectedException(image,token);
6730  (void) GetNextToken(p,&p,MaxTextExtent,token);
6731  if (*token == ',')
6732  (void) GetNextToken(p,&p,MaxTextExtent,token);
6733  y=GetDrawValue(token,&next_token);
6734  if (token == next_token)
6735  ThrowPointExpectedException(image,token);
6736  point.x=(double) (attribute == (int) 'L' ? x : point.x+x);
6737  point.y=(double) (attribute == (int) 'L' ? y : point.y+y);
6738  if (CheckPrimitiveExtent(mvg_info,PrimitiveExtentPad) == MagickFalse)
6739  return(-1);
6740  q=(*mvg_info->primitive_info)+mvg_info->offset;
6741  if (TracePoint(q,point) == MagickFalse)
6742  return(-1);
6743  mvg_info->offset+=q->coordinates;
6744  q+=q->coordinates;
6745  while (isspace((int) ((unsigned char) *p)) != 0)
6746  p++;
6747  if (*p == ',')
6748  p++;
6749  } while (IsPoint(p) != MagickFalse);
6750  break;
6751  }
6752  case 'M':
6753  case 'm':
6754  {
6755  /*
6756  Move to.
6757  */
6758  if (mvg_info->offset != subpath_offset)
6759  {
6760  primitive_info=(*mvg_info->primitive_info)+subpath_offset;
6761  primitive_info->coordinates=(size_t) (q-primitive_info);
6762  number_coordinates+=primitive_info->coordinates;
6763  primitive_info=q;
6764  subpath_offset=mvg_info->offset;
6765  }
6766  i=0;
6767  do
6768  {
6769  (void) GetNextToken(p,&p,MaxTextExtent,token);
6770  if (*token == ',')
6771  (void) GetNextToken(p,&p,MaxTextExtent,token);
6772  x=GetDrawValue(token,&next_token);
6773  if (token == next_token)
6774  ThrowPointExpectedException(image,token);
6775  (void) GetNextToken(p,&p,MaxTextExtent,token);
6776  if (*token == ',')
6777  (void) GetNextToken(p,&p,MaxTextExtent,token);
6778  y=GetDrawValue(token,&next_token);
6779  if (token == next_token)
6780  ThrowPointExpectedException(image,token);
6781  point.x=(double) (attribute == (int) 'M' ? x : point.x+x);
6782  point.y=(double) (attribute == (int) 'M' ? y : point.y+y);
6783  if (i == 0)
6784  start=point;
6785  i++;
6786  if (CheckPrimitiveExtent(mvg_info,PrimitiveExtentPad) == MagickFalse)
6787  return(-1);
6788  q=(*mvg_info->primitive_info)+mvg_info->offset;
6789  if (TracePoint(q,point) == MagickFalse)
6790  return(-1);
6791  mvg_info->offset+=q->coordinates;
6792  q+=q->coordinates;
6793  while (isspace((int) ((unsigned char) *p)) != 0)
6794  p++;
6795  if (*p == ',')
6796  p++;
6797  } while (IsPoint(p) != MagickFalse);
6798  break;
6799  }
6800  case 'q':
6801  case 'Q':
6802  {
6803  /*
6804  Quadratic Bézier curve.
6805  */
6806  do
6807  {
6808  points[0]=point;
6809  for (i=1; i < 3; i++)
6810  {
6811  (void) GetNextToken(p,&p,MaxTextExtent,token);
6812  if (*token == ',')
6813  (void) GetNextToken(p,&p,MaxTextExtent,token);
6814  x=GetDrawValue(token,&next_token);
6815  if (token == next_token)
6816  ThrowPointExpectedException(image,token);
6817  (void) GetNextToken(p,&p,MaxTextExtent,token);
6818  if (*token == ',')
6819  (void) GetNextToken(p,&p,MaxTextExtent,token);
6820  y=GetDrawValue(token,&next_token);
6821  if (token == next_token)
6822  ThrowPointExpectedException(image,token);
6823  if (*p == ',')
6824  p++;
6825  end.x=(double) (attribute == (int) 'Q' ? x : point.x+x);
6826  end.y=(double) (attribute == (int) 'Q' ? y : point.y+y);
6827  points[i]=end;
6828  }
6829  for (i=0; i < 3; i++)
6830  (q+i)->point=points[i];
6831  if (TraceBezier(mvg_info,3) == MagickFalse)
6832  return(-1);
6833  q=(*mvg_info->primitive_info)+mvg_info->offset;
6834  mvg_info->offset+=q->coordinates;
6835  q+=q->coordinates;
6836  point=end;
6837  while (isspace((int) ((unsigned char) *p)) != 0)
6838  p++;
6839  if (*p == ',')
6840  p++;
6841  } while (IsPoint(p) != MagickFalse);
6842  break;
6843  }
6844  case 's':
6845  case 'S':
6846  {
6847  /*
6848  Cubic Bézier curve.
6849  */
6850  do
6851  {
6852  points[0]=points[3];
6853  points[1].x=2.0*points[3].x-points[2].x;
6854  points[1].y=2.0*points[3].y-points[2].y;
6855  for (i=2; i < 4; i++)
6856  {
6857  (void) GetNextToken(p,&p,MaxTextExtent,token);
6858  if (*token == ',')
6859  (void) GetNextToken(p,&p,MaxTextExtent,token);
6860  x=GetDrawValue(token,&next_token);
6861  if (token == next_token)
6862  ThrowPointExpectedException(image,token);
6863  (void) GetNextToken(p,&p,MaxTextExtent,token);
6864  if (*token == ',')
6865  (void) GetNextToken(p,&p,MaxTextExtent,token);
6866  y=GetDrawValue(token,&next_token);
6867  if (token == next_token)
6868  ThrowPointExpectedException(image,token);
6869  if (*p == ',')
6870  p++;
6871  end.x=(double) (attribute == (int) 'S' ? x : point.x+x);
6872  end.y=(double) (attribute == (int) 'S' ? y : point.y+y);
6873  points[i]=end;
6874  }
6875  if (strchr("CcSs",last_attribute) == (char *) NULL)
6876  {
6877  points[0]=point;
6878  points[1]=point;
6879  }
6880  for (i=0; i < 4; i++)
6881  (q+i)->point=points[i];
6882  if (TraceBezier(mvg_info,4) == MagickFalse)
6883  return(-1);
6884  q=(*mvg_info->primitive_info)+mvg_info->offset;
6885  mvg_info->offset+=q->coordinates;
6886  q+=q->coordinates;
6887  point=end;
6888  last_attribute=attribute;
6889  while (isspace((int) ((unsigned char) *p)) != 0)
6890  p++;
6891  if (*p == ',')
6892  p++;
6893  } while (IsPoint(p) != MagickFalse);
6894  break;
6895  }
6896  case 't':
6897  case 'T':
6898  {
6899  /*
6900  Quadratic Bézier curve.
6901  */
6902  do
6903  {
6904  points[0]=points[2];
6905  points[1].x=2.0*points[2].x-points[1].x;
6906  points[1].y=2.0*points[2].y-points[1].y;
6907  for (i=2; i < 3; i++)
6908  {
6909  (void) GetNextToken(p,&p,MaxTextExtent,token);
6910  if (*token == ',')
6911  (void) GetNextToken(p,&p,MaxTextExtent,token);
6912  x=GetDrawValue(token,&next_token);
6913  if (token == next_token)
6914  ThrowPointExpectedException(image,token);
6915  (void) GetNextToken(p,&p,MaxTextExtent,token);
6916  if (*token == ',')
6917  (void) GetNextToken(p,&p,MaxTextExtent,token);
6918  y=GetDrawValue(token,&next_token);
6919  if (token == next_token)
6920  ThrowPointExpectedException(image,token);
6921  end.x=(double) (attribute == (int) 'T' ? x : point.x+x);
6922  end.y=(double) (attribute == (int) 'T' ? y : point.y+y);
6923  points[i]=end;
6924  }
6925  if (status == MagickFalse)
6926  break;
6927  if (strchr("QqTt",last_attribute) == (char *) NULL)
6928  {
6929  points[0]=point;
6930  points[1]=point;
6931  }
6932  for (i=0; i < 3; i++)
6933  (q+i)->point=points[i];
6934  if (TraceBezier(mvg_info,3) == MagickFalse)
6935  return(-1);
6936  q=(*mvg_info->primitive_info)+mvg_info->offset;
6937  mvg_info->offset+=q->coordinates;
6938  q+=q->coordinates;
6939  point=end;
6940  last_attribute=attribute;
6941  while (isspace((int) ((unsigned char) *p)) != 0)
6942  p++;
6943  if (*p == ',')
6944  p++;
6945  } while (IsPoint(p) != MagickFalse);
6946  break;
6947  }
6948  case 'v':
6949  case 'V':
6950  {
6951  /*
6952  Line to.
6953  */
6954  do
6955  {
6956  (void) GetNextToken(p,&p,MaxTextExtent,token);
6957  if (*token == ',')
6958  (void) GetNextToken(p,&p,MaxTextExtent,token);
6959  y=GetDrawValue(token,&next_token);
6960  if (token == next_token)
6961  ThrowPointExpectedException(image,token);
6962  point.y=(double) (attribute == (int) 'V' ? y : point.y+y);
6963  if (CheckPrimitiveExtent(mvg_info,PrimitiveExtentPad) == MagickFalse)
6964  return(-1);
6965  q=(*mvg_info->primitive_info)+mvg_info->offset;
6966  if (TracePoint(q,point) == MagickFalse)
6967  return(-1);
6968  mvg_info->offset+=q->coordinates;
6969  q+=q->coordinates;
6970  while (isspace((int) ((unsigned char) *p)) != 0)
6971  p++;
6972  if (*p == ',')
6973  p++;
6974  } while (IsPoint(p) != MagickFalse);
6975  break;
6976  }
6977  case 'z':
6978  case 'Z':
6979  {
6980  /*
6981  Close path.
6982  */
6983  point=start;
6984  if (CheckPrimitiveExtent(mvg_info,PrimitiveExtentPad) == MagickFalse)
6985  return(-1);
6986  q=(*mvg_info->primitive_info)+mvg_info->offset;
6987  if (TracePoint(q,point) == MagickFalse)
6988  return(-1);
6989  mvg_info->offset+=q->coordinates;
6990  q+=q->coordinates;
6991  primitive_info=(*mvg_info->primitive_info)+subpath_offset;
6992  primitive_info->coordinates=(size_t) (q-primitive_info);
6993  primitive_info->closed_subpath=MagickTrue;
6994  number_coordinates+=primitive_info->coordinates;
6995  primitive_info=q;
6996  subpath_offset=mvg_info->offset;
6997  z_count++;
6998  break;
6999  }
7000  default:
7001  {
7002  ThrowPointExpectedException(image,token);
7003  break;
7004  }
7005  }
7006  }
7007  if (status == MagickFalse)
7008  return(-1);
7009  primitive_info=(*mvg_info->primitive_info)+subpath_offset;
7010  primitive_info->coordinates=(size_t) (q-primitive_info);
7011  number_coordinates+=primitive_info->coordinates;
7012  for (i=0; i < (ssize_t) number_coordinates; i++)
7013  {
7014  q--;
7015  q->primitive=primitive_type;
7016  if (z_count > 1)
7017  q->method=FillToBorderMethod;
7018  }
7019  q=primitive_info;
7020  return((ssize_t) number_coordinates);
7021 }
7022 
7023 static MagickBooleanType TraceRectangle(PrimitiveInfo *primitive_info,
7024  const PointInfo start,const PointInfo end)
7025 {
7026  PointInfo
7027  point;
7028 
7030  *p;
7031 
7032  ssize_t
7033  i;
7034 
7035  p=primitive_info;
7036  if (TracePoint(p,start) == MagickFalse)
7037  return(MagickFalse);
7038  p+=p->coordinates;
7039  point.x=start.x;
7040  point.y=end.y;
7041  if (TracePoint(p,point) == MagickFalse)
7042  return(MagickFalse);
7043  p+=p->coordinates;
7044  if (TracePoint(p,end) == MagickFalse)
7045  return(MagickFalse);
7046  p+=p->coordinates;
7047  point.x=end.x;
7048  point.y=start.y;
7049  if (TracePoint(p,point) == MagickFalse)
7050  return(MagickFalse);
7051  p+=p->coordinates;
7052  if (TracePoint(p,start) == MagickFalse)
7053  return(MagickFalse);
7054  p+=p->coordinates;
7055  primitive_info->coordinates=(size_t) (p-primitive_info);
7056  primitive_info->closed_subpath=MagickTrue;
7057  for (i=0; i < (ssize_t) primitive_info->coordinates; i++)
7058  {
7059  p->primitive=primitive_info->primitive;
7060  p--;
7061  }
7062  return(MagickTrue);
7063 }
7064 
7065 static MagickBooleanType TraceRoundRectangle(MVGInfo *mvg_info,
7066  const PointInfo start,const PointInfo end,PointInfo arc)
7067 {
7068  PointInfo
7069  degrees,
7070  point,
7071  segment;
7072 
7074  *primitive_info;
7075 
7077  *p;
7078 
7079  ssize_t
7080  i;
7081 
7082  ssize_t
7083  offset;
7084 
7085  offset=mvg_info->offset;
7086  segment.x=fabs(end.x-start.x);
7087  segment.y=fabs(end.y-start.y);
7088  if ((segment.x < MagickEpsilon) || (segment.y < MagickEpsilon))
7089  {
7090  (*mvg_info->primitive_info+mvg_info->offset)->coordinates=0;
7091  return(MagickTrue);
7092  }
7093  if (arc.x > (0.5*segment.x))
7094  arc.x=0.5*segment.x;
7095  if (arc.y > (0.5*segment.y))
7096  arc.y=0.5*segment.y;
7097  point.x=start.x+segment.x-arc.x;
7098  point.y=start.y+arc.y;
7099  degrees.x=270.0;
7100  degrees.y=360.0;
7101  if (TraceEllipse(mvg_info,point,arc,degrees) == MagickFalse)
7102  return(MagickFalse);
7103  p=(*mvg_info->primitive_info)+mvg_info->offset;
7104  mvg_info->offset+=p->coordinates;
7105  point.x=start.x+segment.x-arc.x;
7106  point.y=start.y+segment.y-arc.y;
7107  degrees.x=0.0;
7108  degrees.y=90.0;
7109  if (TraceEllipse(mvg_info,point,arc,degrees) == MagickFalse)
7110  return(MagickFalse);
7111  p=(*mvg_info->primitive_info)+mvg_info->offset;
7112  mvg_info->offset+=p->coordinates;
7113  point.x=start.x+arc.x;
7114  point.y=start.y+segment.y-arc.y;
7115  degrees.x=90.0;
7116  degrees.y=180.0;
7117  if (TraceEllipse(mvg_info,point,arc,degrees) == MagickFalse)
7118  return(MagickFalse);
7119  p=(*mvg_info->primitive_info)+mvg_info->offset;
7120  mvg_info->offset+=p->coordinates;
7121  point.x=start.x+arc.x;
7122  point.y=start.y+arc.y;
7123  degrees.x=180.0;
7124  degrees.y=270.0;
7125  if (TraceEllipse(mvg_info,point,arc,degrees) == MagickFalse)
7126  return(MagickFalse);
7127  p=(*mvg_info->primitive_info)+mvg_info->offset;
7128  mvg_info->offset+=p->coordinates;
7129  if (CheckPrimitiveExtent(mvg_info,PrimitiveExtentPad) == MagickFalse)
7130  return(MagickFalse);
7131  p=(*mvg_info->primitive_info)+mvg_info->offset;
7132  if (TracePoint(p,(*mvg_info->primitive_info+offset)->point) == MagickFalse)
7133  return(MagickFalse);
7134  p+=p->coordinates;
7135  mvg_info->offset=offset;
7136  primitive_info=(*mvg_info->primitive_info)+offset;
7137  primitive_info->coordinates=(size_t) (p-primitive_info);
7138  primitive_info->closed_subpath=MagickTrue;
7139  for (i=0; i < (ssize_t) primitive_info->coordinates; i++)
7140  {
7141  p->primitive=primitive_info->primitive;
7142  p--;
7143  }
7144  return(MagickTrue);
7145 }
7146 
7147 static MagickBooleanType TraceSquareLinecap(PrimitiveInfo *primitive_info,
7148  const size_t number_vertices,const double offset)
7149 {
7150  double
7151  distance;
7152 
7153  double
7154  dx,
7155  dy;
7156 
7157  ssize_t
7158  i;
7159 
7160  ssize_t
7161  j;
7162 
7163  dx=0.0;
7164  dy=0.0;
7165  for (i=1; i < (ssize_t) number_vertices; i++)
7166  {
7167  dx=primitive_info[0].point.x-primitive_info[i].point.x;
7168  dy=primitive_info[0].point.y-primitive_info[i].point.y;
7169  if ((fabs((double) dx) >= MagickEpsilon) ||
7170  (fabs((double) dy) >= MagickEpsilon))
7171  break;
7172  }
7173  if (i == (ssize_t) number_vertices)
7174  i=(ssize_t) number_vertices-1L;
7175  distance=hypot((double) dx,(double) dy);
7176  primitive_info[0].point.x=(double) (primitive_info[i].point.x+
7177  dx*(distance+offset)/distance);
7178  primitive_info[0].point.y=(double) (primitive_info[i].point.y+
7179  dy*(distance+offset)/distance);
7180  for (j=(ssize_t) number_vertices-2; j >= 0; j--)
7181  {
7182  dx=primitive_info[number_vertices-1].point.x-primitive_info[j].point.x;
7183  dy=primitive_info[number_vertices-1].point.y-primitive_info[j].point.y;
7184  if ((fabs((double) dx) >= MagickEpsilon) ||
7185  (fabs((double) dy) >= MagickEpsilon))
7186  break;
7187  }
7188  distance=hypot((double) dx,(double) dy);
7189  primitive_info[number_vertices-1].point.x=(double) (primitive_info[j].point.x+
7190  dx*(distance+offset)/distance);
7191  primitive_info[number_vertices-1].point.y=(double) (primitive_info[j].point.y+
7192  dy*(distance+offset)/distance);
7193  return(MagickTrue);
7194 }
7195 
7196 static PrimitiveInfo *TraceStrokePolygon(const DrawInfo *draw_info,
7197  const PrimitiveInfo *primitive_info,ExceptionInfo *exception)
7198 {
7199 #define MaxStrokePad (6*BezierQuantum+360)
7200 #define CheckPathExtent(pad_p,pad_q) \
7201 { \
7202  if ((pad_p) > MaxBezierCoordinates) \
7203  stroke_p=(PointInfo *) RelinquishMagickMemory(stroke_p); \
7204  else \
7205  if ((ssize_t) (p+(pad_p)) >= (ssize_t) extent_p) \
7206  { \
7207  if (~extent_p < (pad_p)) \
7208  stroke_p=(PointInfo *) RelinquishMagickMemory(stroke_p); \
7209  else \
7210  { \
7211  extent_p+=(pad_p); \
7212  stroke_p=(PointInfo *) ResizeQuantumMemory(stroke_p,extent_p+ \
7213  MaxStrokePad,sizeof(*stroke_p)); \
7214  } \
7215  } \
7216  if ((pad_q) > MaxBezierCoordinates) \
7217  stroke_q=(PointInfo *) RelinquishMagickMemory(stroke_q); \
7218  else \
7219  if ((ssize_t) (q+(pad_q)) >= (ssize_t) extent_q) \
7220  { \
7221  if (~extent_q < (pad_q)) \
7222  stroke_q=(PointInfo *) RelinquishMagickMemory(stroke_q); \
7223  else \
7224  { \
7225  extent_q+=(pad_q); \
7226  stroke_q=(PointInfo *) ResizeQuantumMemory(stroke_q,extent_q+ \
7227  MaxStrokePad,sizeof(*stroke_q)); \
7228  } \
7229  } \
7230  if ((stroke_p == (PointInfo *) NULL) || (stroke_q == (PointInfo *) NULL)) \
7231  { \
7232  if (stroke_p != (PointInfo *) NULL) \
7233  stroke_p=(PointInfo *) RelinquishMagickMemory(stroke_p); \
7234  if (stroke_q != (PointInfo *) NULL) \
7235  stroke_q=(PointInfo *) RelinquishMagickMemory(stroke_q); \
7236  polygon_primitive=(PrimitiveInfo *) \
7237  RelinquishMagickMemory(polygon_primitive); \
7238  (void) ThrowMagickException(exception,GetMagickModule(), \
7239  ResourceLimitError,"MemoryAllocationFailed","`%s'",""); \
7240  return((PrimitiveInfo *) NULL); \
7241  } \
7242 }
7243 
7244  typedef struct _StrokeSegment
7245  {
7246  double
7247  p,
7248  q;
7249  } StrokeSegment;
7250 
7251  double
7252  delta_theta,
7253  dot_product,
7254  mid,
7255  miterlimit;
7256 
7257  MagickBooleanType
7258  closed_path;
7259 
7260  PointInfo
7261  box_p[5],
7262  box_q[5],
7263  center,
7264  offset,
7265  *stroke_p,
7266  *stroke_q;
7267 
7269  *polygon_primitive,
7270  *stroke_polygon;
7271 
7272  ssize_t
7273  i;
7274 
7275  size_t
7276  arc_segments,
7277  extent_p,
7278  extent_q,
7279  number_vertices;
7280 
7281  ssize_t
7282  j,
7283  n,
7284  p,
7285  q;
7286 
7287  StrokeSegment
7288  dx = {0.0, 0.0},
7289  dy = {0.0, 0.0},
7290  inverse_slope = {0.0, 0.0},
7291  slope = {0.0, 0.0},
7292  theta = {0.0, 0.0};
7293 
7294  /*
7295  Allocate paths.
7296  */
7297  number_vertices=primitive_info->coordinates;
7298  polygon_primitive=(PrimitiveInfo *) AcquireQuantumMemory((size_t)
7299  number_vertices+2UL,sizeof(*polygon_primitive));
7300  if (polygon_primitive == (PrimitiveInfo *) NULL)
7301  {
7302  (void) ThrowMagickException(exception,GetMagickModule(),
7303  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
7304  return((PrimitiveInfo *) NULL);
7305  }
7306  (void) memcpy(polygon_primitive,primitive_info,(size_t) number_vertices*
7307  sizeof(*polygon_primitive));
7308  offset.x=primitive_info[number_vertices-1].point.x-primitive_info[0].point.x;
7309  offset.y=primitive_info[number_vertices-1].point.y-primitive_info[0].point.y;
7310  closed_path=(fabs(offset.x) < MagickEpsilon) &&
7311  (fabs(offset.y) < MagickEpsilon) ? MagickTrue : MagickFalse;
7312  if (((draw_info->linejoin == RoundJoin) ||
7313  (draw_info->linejoin == MiterJoin)) && (closed_path != MagickFalse))
7314  {
7315  polygon_primitive[number_vertices]=primitive_info[1];
7316  number_vertices++;
7317  }
7318  polygon_primitive[number_vertices].primitive=UndefinedPrimitive;
7319  /*
7320  Compute the slope for the first line segment, p.
7321  */
7322  dx.p=0.0;
7323  dy.p=0.0;
7324  for (n=1; n < (ssize_t) number_vertices; n++)
7325  {
7326  dx.p=polygon_primitive[n].point.x-polygon_primitive[0].point.x;
7327  dy.p=polygon_primitive[n].point.y-polygon_primitive[0].point.y;
7328  if ((fabs(dx.p) >= MagickEpsilon) || (fabs(dy.p) >= MagickEpsilon))
7329  break;
7330  }
7331  if (n == (ssize_t) number_vertices)
7332  {
7333  if ((draw_info->linecap != RoundCap) || (closed_path != MagickFalse))
7334  {
7335  /*
7336  Zero length subpath.
7337  */
7338  stroke_polygon=(PrimitiveInfo *) AcquireCriticalMemory(
7339  sizeof(*stroke_polygon));
7340  stroke_polygon[0]=polygon_primitive[0];
7341  stroke_polygon[0].coordinates=0;
7342  polygon_primitive=(PrimitiveInfo *) RelinquishMagickMemory(
7343  polygon_primitive);
7344  return(stroke_polygon);
7345  }
7346  n=(ssize_t) number_vertices-1L;
7347  }
7348  extent_p=2*number_vertices;
7349  extent_q=2*number_vertices;
7350  stroke_p=(PointInfo *) AcquireQuantumMemory((size_t) extent_p+MaxStrokePad,
7351  sizeof(*stroke_p));
7352  stroke_q=(PointInfo *) AcquireQuantumMemory((size_t) extent_q+MaxStrokePad,
7353  sizeof(*stroke_q));
7354  if ((stroke_p == (PointInfo *) NULL) || (stroke_q == (PointInfo *) NULL))
7355  {
7356  if (stroke_p != (PointInfo *) NULL)
7357  stroke_p=(PointInfo *) RelinquishMagickMemory(stroke_p);
7358  if (stroke_q != (PointInfo *) NULL)
7359  stroke_q=(PointInfo *) RelinquishMagickMemory(stroke_q);
7360  polygon_primitive=(PrimitiveInfo *)
7361  RelinquishMagickMemory(polygon_primitive);
7362  (void) ThrowMagickException(exception,GetMagickModule(),
7363  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
7364  return((PrimitiveInfo *) NULL);
7365  }
7366  slope.p=0.0;
7367  inverse_slope.p=0.0;
7368  if (fabs(dx.p) < MagickEpsilon)
7369  {
7370  if (dx.p >= 0.0)
7371  slope.p=dy.p < 0.0 ? -1.0/MagickEpsilon : 1.0/MagickEpsilon;
7372  else
7373  slope.p=dy.p < 0.0 ? 1.0/MagickEpsilon : -1.0/MagickEpsilon;
7374  }
7375  else
7376  if (fabs(dy.p) < MagickEpsilon)
7377  {
7378  if (dy.p >= 0.0)
7379  inverse_slope.p=dx.p < 0.0 ? -1.0/MagickEpsilon : 1.0/MagickEpsilon;
7380  else
7381  inverse_slope.p=dx.p < 0.0 ? 1.0/MagickEpsilon : -1.0/MagickEpsilon;
7382  }
7383  else
7384  {
7385  slope.p=dy.p/dx.p;
7386  inverse_slope.p=(-1.0*PerceptibleReciprocal(slope.p));
7387  }
7388  mid=ExpandAffine(&draw_info->affine)*draw_info->stroke_width/2.0;
7389  miterlimit=(double) (draw_info->miterlimit*draw_info->miterlimit*mid*mid);
7390  if ((draw_info->linecap == SquareCap) && (closed_path == MagickFalse))
7391  (void) TraceSquareLinecap(polygon_primitive,number_vertices,mid);
7392  offset.x=sqrt((double) (mid*mid/(inverse_slope.p*inverse_slope.p+1.0)));
7393  offset.y=(double) (offset.x*inverse_slope.p);
7394  if ((dy.p*offset.x-dx.p*offset.y) > 0.0)
7395  {
7396  box_p[0].x=polygon_primitive[0].point.x-offset.x;
7397  box_p[0].y=polygon_primitive[0].point.y-offset.x*inverse_slope.p;
7398  box_p[1].x=polygon_primitive[n].point.x-offset.x;
7399  box_p[1].y=polygon_primitive[n].point.y-offset.x*inverse_slope.p;
7400  box_q[0].x=polygon_primitive[0].point.x+offset.x;
7401  box_q[0].y=polygon_primitive[0].point.y+offset.x*inverse_slope.p;
7402  box_q[1].x=polygon_primitive[n].point.x+offset.x;
7403  box_q[1].y=polygon_primitive[n].point.y+offset.x*inverse_slope.p;
7404  }
7405  else
7406  {
7407  box_p[0].x=polygon_primitive[0].point.x+offset.x;
7408  box_p[0].y=polygon_primitive[0].point.y+offset.y;
7409  box_p[1].x=polygon_primitive[n].point.x+offset.x;
7410  box_p[1].y=polygon_primitive[n].point.y+offset.y;
7411  box_q[0].x=polygon_primitive[0].point.x-offset.x;
7412  box_q[0].y=polygon_primitive[0].point.y-offset.y;
7413  box_q[1].x=polygon_primitive[n].point.x-offset.x;
7414  box_q[1].y=polygon_primitive[n].point.y-offset.y;
7415  }
7416  /*
7417  Create strokes for the line join attribute: bevel, miter, round.
7418  */
7419  p=0;
7420  q=0;
7421  stroke_q[p++]=box_q[0];
7422  stroke_p[q++]=box_p[0];
7423  for (i=(ssize_t) n+1; i < (ssize_t) number_vertices; i++)
7424  {
7425  /*
7426  Compute the slope for this line segment, q.
7427  */
7428  dx.q=polygon_primitive[i].point.x-polygon_primitive[n].point.x;
7429  dy.q=polygon_primitive[i].point.y-polygon_primitive[n].point.y;
7430  dot_product=dx.q*dx.q+dy.q*dy.q;
7431  if (dot_product < 0.25)
7432  continue;
7433  slope.q=0.0;
7434  inverse_slope.q=0.0;
7435  if (fabs(dx.q) < MagickEpsilon)
7436  {
7437  if (dx.q >= 0.0)
7438  slope.q=dy.q < 0.0 ? -1.0/MagickEpsilon : 1.0/MagickEpsilon;
7439  else
7440  slope.q=dy.q < 0.0 ? 1.0/MagickEpsilon : -1.0/MagickEpsilon;
7441  }
7442  else
7443  if (fabs(dy.q) < MagickEpsilon)
7444  {
7445  if (dy.q >= 0.0)
7446  inverse_slope.q=dx.q < 0.0 ? -1.0/MagickEpsilon : 1.0/MagickEpsilon;
7447  else
7448  inverse_slope.q=dx.q < 0.0 ? 1.0/MagickEpsilon : -1.0/MagickEpsilon;
7449  }
7450  else
7451  {
7452  slope.q=dy.q/dx.q;
7453  inverse_slope.q=(-1.0*PerceptibleReciprocal(slope.q));
7454  }
7455  offset.x=sqrt((double) (mid*mid/(inverse_slope.q*inverse_slope.q+1.0)));
7456  offset.y=(double) (offset.x*inverse_slope.q);
7457  dot_product=dy.q*offset.x-dx.q*offset.y;
7458  if (dot_product > 0.0)
7459  {
7460  box_p[2].x=polygon_primitive[n].point.x-offset.x;
7461  box_p[2].y=polygon_primitive[n].point.y-offset.y;
7462  box_p[3].x=polygon_primitive[i].point.x-offset.x;
7463  box_p[3].y=polygon_primitive[i].point.y-offset.y;
7464  box_q[2].x=polygon_primitive[n].point.x+offset.x;
7465  box_q[2].y=polygon_primitive[n].point.y+offset.y;
7466  box_q[3].x=polygon_primitive[i].point.x+offset.x;
7467  box_q[3].y=polygon_primitive[i].point.y+offset.y;
7468  }
7469  else
7470  {
7471  box_p[2].x=polygon_primitive[n].point.x+offset.x;
7472  box_p[2].y=polygon_primitive[n].point.y+offset.y;
7473  box_p[3].x=polygon_primitive[i].point.x+offset.x;
7474  box_p[3].y=polygon_primitive[i].point.y+offset.y;
7475  box_q[2].x=polygon_primitive[n].point.x-offset.x;
7476  box_q[2].y=polygon_primitive[n].point.y-offset.y;
7477  box_q[3].x=polygon_primitive[i].point.x-offset.x;
7478  box_q[3].y=polygon_primitive[i].point.y-offset.y;
7479  }
7480  if (fabs((double) (slope.p-slope.q)) < MagickEpsilon)
7481  {
7482  box_p[4]=box_p[1];
7483  box_q[4]=box_q[1];
7484  }
7485  else
7486  {
7487  box_p[4].x=(double) ((slope.p*box_p[0].x-box_p[0].y-slope.q*box_p[3].x+
7488  box_p[3].y)/(slope.p-slope.q));
7489  box_p[4].y=(double) (slope.p*(box_p[4].x-box_p[0].x)+box_p[0].y);
7490  box_q[4].x=(double) ((slope.p*box_q[0].x-box_q[0].y-slope.q*box_q[3].x+
7491  box_q[3].y)/(slope.p-slope.q));
7492  box_q[4].y=(double) (slope.p*(box_q[4].x-box_q[0].x)+box_q[0].y);
7493  }
7494  CheckPathExtent(MaxStrokePad,MaxStrokePad);
7495  dot_product=dx.q*dy.p-dx.p*dy.q;
7496  if (dot_product <= 0.0)
7497  switch (draw_info->linejoin)
7498  {
7499  case BevelJoin:
7500  {
7501  stroke_q[q++]=box_q[1];
7502  stroke_q[q++]=box_q[2];
7503  dot_product=(box_q[4].x-box_p[4].x)*(box_q[4].x-box_p[4].x)+
7504  (box_q[4].y-box_p[4].y)*(box_q[4].y-box_p[4].y);
7505  if (dot_product <= miterlimit)
7506  stroke_p[p++]=box_p[4];
7507  else
7508  {
7509  stroke_p[p++]=box_p[1];
7510  stroke_p[p++]=box_p[2];
7511  }
7512  break;
7513  }
7514  case MiterJoin:
7515  {
7516  dot_product=(box_q[4].x-box_p[4].x)*(box_q[4].x-box_p[4].x)+
7517  (box_q[4].y-box_p[4].y)*(box_q[4].y-box_p[4].y);
7518  if (dot_product <= miterlimit)
7519  {
7520  stroke_q[q++]=box_q[4];
7521  stroke_p[p++]=box_p[4];
7522  }
7523  else
7524  {
7525  stroke_q[q++]=box_q[1];
7526  stroke_q[q++]=box_q[2];
7527  stroke_p[p++]=box_p[1];
7528  stroke_p[p++]=box_p[2];
7529  }
7530  break;
7531  }
7532  case RoundJoin:
7533  {
7534  dot_product=(box_q[4].x-box_p[4].x)*(box_q[4].x-box_p[4].x)+
7535  (box_q[4].y-box_p[4].y)*(box_q[4].y-box_p[4].y);
7536  if (dot_product <= miterlimit)
7537  stroke_p[p++]=box_p[4];
7538  else
7539  {
7540  stroke_p[p++]=box_p[1];
7541  stroke_p[p++]=box_p[2];
7542  }
7543  center=polygon_primitive[n].point;
7544  theta.p=atan2(box_q[1].y-center.y,box_q[1].x-center.x);
7545  theta.q=atan2(box_q[2].y-center.y,box_q[2].x-center.x);
7546  if (theta.q < theta.p)
7547  theta.q+=2.0*MagickPI;
7548  arc_segments=(size_t) CastDoubleToLong(ceil((double) ((theta.q-
7549  theta.p)/(2.0*sqrt(PerceptibleReciprocal(mid))))));
7550  CheckPathExtent(MaxStrokePad,arc_segments+MaxStrokePad);
7551  stroke_q[q].x=box_q[1].x;
7552  stroke_q[q].y=box_q[1].y;
7553  q++;
7554  for (j=1; j < (ssize_t) arc_segments; j++)
7555  {
7556  delta_theta=(double) (j*(theta.q-theta.p)/arc_segments);
7557  stroke_q[q].x=(double) (center.x+mid*cos(fmod((double)
7558  (theta.p+delta_theta),DegreesToRadians(360.0))));
7559  stroke_q[q].y=(double) (center.y+mid*sin(fmod((double)
7560  (theta.p+delta_theta),DegreesToRadians(360.0))));
7561  q++;
7562  }
7563  stroke_q[q++]=box_q[2];
7564  break;
7565  }
7566  default:
7567  break;
7568  }
7569  else
7570  switch (draw_info->linejoin)
7571  {
7572  case BevelJoin:
7573  {
7574  stroke_p[p++]=box_p[1];
7575  stroke_p[p++]=box_p[2];
7576  dot_product=(box_q[4].x-box_p[4].x)*(box_q[4].x-box_p[4].x)+
7577  (box_q[4].y-box_p[4].y)*(box_q[4].y-box_p[4].y);
7578  if (dot_product <= miterlimit)
7579  stroke_q[q++]=box_q[4];
7580  else
7581  {
7582  stroke_q[q++]=box_q[1];
7583  stroke_q[q++]=box_q[2];
7584  }
7585  break;
7586  }
7587  case MiterJoin:
7588  {
7589  dot_product=(box_q[4].x-box_p[4].x)*(box_q[4].x-box_p[4].x)+
7590  (box_q[4].y-box_p[4].y)*(box_q[4].y-box_p[4].y);
7591  if (dot_product <= miterlimit)
7592  {
7593  stroke_q[q++]=box_q[4];
7594  stroke_p[p++]=box_p[4];
7595  }
7596  else
7597  {
7598  stroke_q[q++]=box_q[1];
7599  stroke_q[q++]=box_q[2];
7600  stroke_p[p++]=box_p[1];
7601  stroke_p[p++]=box_p[2];
7602  }
7603  break;
7604  }
7605  case RoundJoin:
7606  {
7607  dot_product=(box_q[4].x-box_p[4].x)*(box_q[4].x-box_p[4].x)+
7608  (box_q[4].y-box_p[4].y)*(box_q[4].y-box_p[4].y);
7609  if (dot_product <= miterlimit)
7610  stroke_q[q++]=box_q[4];
7611  else
7612  {
7613  stroke_q[q++]=box_q[1];
7614  stroke_q[q++]=box_q[2];
7615  }
7616  center=polygon_primitive[n].point;
7617  theta.p=atan2(box_p[1].y-center.y,box_p[1].x-center.x);
7618  theta.q=atan2(box_p[2].y-center.y,box_p[2].x-center.x);
7619  if (theta.p < theta.q)
7620  theta.p+=2.0*MagickPI;
7621  arc_segments=(size_t) CastDoubleToLong(ceil((double) ((theta.p-
7622  theta.q)/(2.0*sqrt((double) (PerceptibleReciprocal(mid)))))));
7623  CheckPathExtent(arc_segments+MaxStrokePad,MaxStrokePad);
7624  stroke_p[p++]=box_p[1];
7625  for (j=1; j < (ssize_t) arc_segments; j++)
7626  {
7627  delta_theta=(double) (j*(theta.q-theta.p)/arc_segments);
7628  stroke_p[p].x=(double) (center.x+mid*cos(fmod((double)
7629  (theta.p+delta_theta),DegreesToRadians(360.0))));
7630  stroke_p[p].y=(double) (center.y+mid*sin(fmod((double)
7631  (theta.p+delta_theta),DegreesToRadians(360.0))));
7632  p++;
7633  }
7634  stroke_p[p++]=box_p[2];
7635  break;
7636  }
7637  default:
7638  break;
7639  }
7640  slope.p=slope.q;
7641  inverse_slope.p=inverse_slope.q;
7642  box_p[0]=box_p[2];
7643  box_p[1]=box_p[3];
7644  box_q[0]=box_q[2];
7645  box_q[1]=box_q[3];
7646  dx.p=dx.q;
7647  dy.p=dy.q;
7648  n=i;
7649  }
7650  stroke_p[p++]=box_p[1];
7651  stroke_q[q++]=box_q[1];
7652  /*
7653  Trace stroked polygon.
7654  */
7655  stroke_polygon=(PrimitiveInfo *) AcquireQuantumMemory((size_t)
7656  (p+q+2UL*closed_path+2UL),sizeof(*stroke_polygon));
7657  if (stroke_polygon == (PrimitiveInfo *) NULL)
7658  {
7659  (void) ThrowMagickException(exception,GetMagickModule(),
7660  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
7661  stroke_p=(PointInfo *) RelinquishMagickMemory(stroke_p);
7662  stroke_q=(PointInfo *) RelinquishMagickMemory(stroke_q);
7663  polygon_primitive=(PrimitiveInfo *) RelinquishMagickMemory(
7664  polygon_primitive);
7665  return(stroke_polygon);
7666  }
7667  for (i=0; i < (ssize_t) p; i++)
7668  {
7669  stroke_polygon[i]=polygon_primitive[0];
7670  stroke_polygon[i].point=stroke_p[i];
7671  }
7672  if (closed_path != MagickFalse)
7673  {
7674  stroke_polygon[i]=polygon_primitive[0];
7675  stroke_polygon[i].point=stroke_polygon[0].point;
7676  i++;
7677  }
7678  for ( ; i < (ssize_t) (p+q+closed_path); i++)
7679  {
7680  stroke_polygon[i]=polygon_primitive[0];
7681  stroke_polygon[i].point=stroke_q[p+q+closed_path-(i+1)];
7682  }
7683  if (closed_path != MagickFalse)
7684  {
7685  stroke_polygon[i]=polygon_primitive[0];
7686  stroke_polygon[i].point=stroke_polygon[p+closed_path].point;
7687  i++;
7688  }
7689  stroke_polygon[i]=polygon_primitive[0];
7690  stroke_polygon[i].point=stroke_polygon[0].point;
7691  i++;
7692  stroke_polygon[i].primitive=UndefinedPrimitive;
7693  stroke_polygon[0].coordinates=(size_t) (p+q+2*closed_path+1);
7694  stroke_p=(PointInfo *) RelinquishMagickMemory(stroke_p);
7695  stroke_q=(PointInfo *) RelinquishMagickMemory(stroke_q);
7696  polygon_primitive=(PrimitiveInfo *) RelinquishMagickMemory(polygon_primitive);
7697  return(stroke_polygon);
7698 }
Definition: draw.c:145
Definition: image.h:133