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app_server: fix direct assignment in alpha pixel composite

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* 'alpha' is 16 bit (alpha * cover) in blend_hline_alpha_pc(), so
  compare with 255 * 255
This commit is contained in:
Julian Harnath
2015-08-23 01:00:23 +02:00
parent 01c7304204
commit ed7b139e08
1 changed files with 6 additions and 6 deletions
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src/servers/app/drawing/Painter/drawing_modes/DrawingModeAlphaPC.h
+1 -1
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@@ -52,7 +52,7 @@ blend_hline_alpha_pc(int x, int y, unsigned len,
rgb_color color = pattern->ColorAt(x, y); rgb_color color = pattern->ColorAt(x, y);
uint16 alpha = color.alpha * cover; uint16 alpha = color.alpha * cover;
if (alpha) { if (alpha) {
if (alpha == 255) { if (alpha == 255 * 255) {
ASSIGN_ALPHA_PC(p, color.red, color.green, color.blue); ASSIGN_ALPHA_PC(p, color.red, color.green, color.blue);
} else { } else {
BLEND_ALPHA_PC(p, color.red, color.green, color.blue, alpha); BLEND_ALPHA_PC(p, color.red, color.green, color.blue, alpha);