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diff -up gd-2.0.35/gd.c.AALineThick gd-2.0.35/gd.c
--- gd-2.0.35/gd.c.AALineThick 2007-06-19 22:25:51.000000000 +0200
+++ gd-2.0.35/gd.c 2012-02-28 11:02:09.708015922 +0100
@@ -3474,6 +3474,8 @@ static void gdImageAALine (gdImagePtr im
/* keep them as 32bits */
long x, y, inc;
long dx, dy,tmp;
+ int w, wid, wstart;
+ int thick = im->thick;
if (!im->trueColor) {
/* TBB: don't crash when the image is of the wrong type */
@@ -3502,6 +3504,25 @@ static void gdImageAALine (gdImagePtr im
gdImageSetAAPixelColor(im, x1, y1, col, 0xFF);
return;
}
+ else {
+ double ag;
+ if (abs(dy) < abs(dx))
+ ag = cos (atan2 (dy, dx));
+ else
+ ag = sin (atan2 (dy, dx));
+ if (ag != 0)
+ {
+ wid = abs(thick / ag);
+ }
+ else
+ {
+ wid = 1;
+ }
+ if (wid == 0)
+ {
+ wid = 1;
+ }
+ }
if (abs(dx) > abs(dy)) {
if (dx < 0) {
tmp = x1;
@@ -3518,8 +3539,11 @@ static void gdImageAALine (gdImagePtr im
inc = (dy * 65536) / dx;
/* TBB: set the last pixel for consistency (<=) */
while ((x >> 16) <= x2) {
- gdImageSetAAPixelColor(im, x >> 16, y >> 16, col, (y >> 8) & 0xFF);
- gdImageSetAAPixelColor(im, x >> 16, (y >> 16) + 1,col, (~y >> 8) & 0xFF);
+ wstart = (y >> 16) - wid / 2;
+ for (w = wstart; w < wstart + wid; w++) {
+ gdImageSetAAPixelColor(im, (x >> 16) , w , col , (y >> 8) & 0xFF);
+ gdImageSetAAPixelColor(im, (x >> 16) , w + 1 , col, (~y >> 8) & 0xFF);
+ }
x += (1 << 16);
y += inc;
}
@@ -3539,8 +3563,11 @@ static void gdImageAALine (gdImagePtr im
inc = (dx * 65536) / dy;
/* TBB: set the last pixel for consistency (<=) */
while ((y>>16) <= y2) {
- gdImageSetAAPixelColor(im, x >> 16, y >> 16, col, (x >> 8) & 0xFF);
- gdImageSetAAPixelColor(im, (x >> 16) + 1, (y >> 16),col, (~x >> 8) & 0xFF);
+ wstart = (x >> 16) - wid / 2;
+ for (w = wstart; w < wstart + wid; w++) {
+ gdImageSetAAPixelColor(im, w , y >> 16 , col, (x >> 8) & 0xFF);
+ gdImageSetAAPixelColor(im, w + 1, y >> 16, col, (~x >> 8) & 0xFF);
+ }
x += inc;
y += (1<<16);
}
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