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* don't read the frame buffer a second time when no

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blending has to take place


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@18839 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Stephan Aßmus 2006-09-14 17:55:55 +00:00
parent a89fb19365
commit af957c251b
1 changed files with 7 additions and 3 deletions
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10
src/servers/app/drawing/Painter/drawing_modes/DrawingMode.h
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@ -76,7 +76,10 @@ typedef PixelFormat::agg_buffer agg_buffer;
pixel32 _p; \
_p.data32 = *(uint32*)d; \
if (_p.data8[3] == 255) { \
BLEND(d, r, g, b, a); \
d[0] = (((((b) - _p.data8[0]) * (a)) + (_p.data8[0] << 8)) >> 8); \
d[1] = (((((g) - _p.data8[1]) * (a)) + (_p.data8[1] << 8)) >> 8); \
d[2] = (((((r) - _p.data8[2]) * (a)) + (_p.data8[2] << 8)) >> 8); \
d[3] = 255; \
} else { \
if (_p.data8[3] == 0) { \
d[0] = (b); \
@ -91,7 +94,7 @@ typedef PixelFormat::agg_buffer agg_buffer;
d[0] = (_p.data8[0] * alphaDest + (b) * alphaSrc) / alphaTemp; \
d[1] = (_p.data8[1] * alphaDest + (g) * alphaSrc) / alphaTemp; \
d[2] = (_p.data8[2] * alphaDest + (r) * alphaSrc) / alphaTemp; \
d[3] = alphaTemp >> 8; \
d[3] = alphaTemp / 255; \
} \
} \
}
@ -103,7 +106,8 @@ typedef PixelFormat::agg_buffer agg_buffer;
// TODO: implement a faster version
#define BLEND_COMPOSITE16(d, r, g, b, a) \
{ \
BLEND_COMPOSITE(d, r, g, b, (a) >> 8); \
uint16 _a = (a) / 255; \
BLEND_COMPOSITE(d, r, g, b, _a); \
}