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softgpu: Optimize alpha blending handling.

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This alone makes it a good bit faster.
This commit is contained in:
Unknown W. Brackets 2014-03-16 15:22:31 -07:00
parent f21649e563
commit d9e29a2edf
1 changed files with 9 additions and 9 deletions
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18
GPU/Software/Rasterizer.cpp
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@ -893,18 +893,18 @@ inline void DrawSinglePixel(const DrawingCoords &p, u16 z, Vec4<int> prim_color)
prim_color.b() <<= 1;
}
const u32 old_color = GetPixelColor(p.x, p.y);
u32 new_color;
if (gstate.isAlphaBlendEnabled() && !clearMode) {
Vec4<int> dst = Vec4<int>::FromRGBA(GetPixelColor(p.x, p.y));
// We can discard the vertex alpha at this point.
prim_color = Vec4<int>(AlphaBlendingResult(prim_color, dst), 0);
const Vec4<int> dst = Vec4<int>::FromRGBA(old_color);
new_color = Vec4<int>(AlphaBlendingResult(prim_color, dst).Clamp(0, 255), stencil).ToRGBA();
} else {
if (!clearMode)
prim_color = prim_color.Clamp(0, 255);
new_color = Vec4<int>(prim_color.r(), prim_color.g(), prim_color.b(), stencil).ToRGBA();
}
if (!clearMode)
prim_color = prim_color.Clamp(0, 255);
u32 new_color = Vec4<int>(prim_color.r(), prim_color.g(), prim_color.b(), stencil).ToRGBA();
u32 old_color = GetPixelColor(p.x, p.y);
// TODO: Is alpha blending still performed if logic ops are enabled?
if (gstate.isLogicOpEnabled() && !clearMode) {
// Logic ops don't affect stencil.