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quick fix for supporting B_TRANSPARENT_MAGIC pixels in CMAP8 bitmaps when drawing those with B_OP_ALPHA (composite, constant alpha)

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git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15677 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Stephan Aßmus
2005-12-26 17:41:18 +00:00
parent 0398e7fb64
commit 65b53cc601
1 changed files with 9 additions and 1 deletions
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src/servers/app/drawing/Painter/drawing_modes/DrawingModeAlphaCC.h
+9 -1
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@@ -149,7 +149,9 @@ blend_color_hspan_alpha_cc(int x, int y, unsigned len,
// non-solid opacity
do {
uint16 alpha = hAlpha * *covers;
if (alpha) {
// if (alpha) {
if (alpha && (colors->a & 0xff)) {
// support for transparent magic
if (alpha == 255 * 255) {
ASSIGN_ALPHA_CC(p, colors->r, colors->g, colors->b);
} else {
@@ -165,14 +167,20 @@ blend_color_hspan_alpha_cc(int x, int y, unsigned len,
uint16 alpha = hAlpha * cover;
if (alpha == 255 * 255) {
do {
if (colors->a & 0xff) {
// support for transparent magic
ASSIGN_ALPHA_CC(p, colors->r, colors->g, colors->b);
}
p += 4;
++colors;
} while(--len);
// solid partial opacity
} else if (alpha) {
do {
if (colors->a & 0xff) {
// support for transparent magic
BLEND_ALPHA_CC(p, colors->r, colors->g, colors->b, alpha);
}
p += 4;
++colors;
} while(--len);