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