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softgpu: Implement logic ops.

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Tony Wasserka 2013-07-21 20:56:01 +02:00 • committed by neobrain
parent c957574f90
commit 4e1d2f0cb2
1 changed files with 70 additions and 0 deletions
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70
GPU/Software/Rasterizer.cpp
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@ -647,6 +647,76 @@ void DrawTriangle(const VertexData& v0, const VertexData& v1, const VertexData&
u32 new_color = Vec4<int>(prim_color_rgb.r(), prim_color_rgb.g(), prim_color_rgb.b(), prim_color_a).ToRGBA();
u32 old_color = GetPixelColor(p.x, p.y);
// TODO: Is alpha blending still performed if logic ops are enabled?
if (gstate.isLogicOpEnabled()) {
switch (gstate.getLogicOp()) {
case GE_LOGIC_CLEAR:
new_color = 0;
break;
case GE_LOGIC_AND:
new_color = new_color & old_color;
break;
case GE_LOGIC_AND_REVERSE:
new_color = new_color & ~old_color;
break;
case GE_LOGIC_COPY:
//new_color = new_color;
break;
case GE_LOGIC_AND_INVERTED:
new_color = ~new_color & old_color;
break;
case GE_LOGIC_NOOP:
new_color = old_color;
break;
case GE_LOGIC_XOR:
new_color = new_color ^ old_color;
break;
case GE_LOGIC_OR:
new_color = new_color | old_color;
break;
case GE_LOGIC_NOR:
new_color = ~(new_color | old_color);
break;
case GE_LOGIC_EQUIV:
new_color = ~(new_color ^ old_color);
break;
case GE_LOGIC_INVERTED:
new_color = ~old_color;
break;
case GE_LOGIC_OR_REVERSE:
new_color = new_color | ~old_color;
break;
case GE_LOGIC_COPY_INVERTED:
new_color = ~new_color;
break;
case GE_LOGIC_OR_INVERTED:
new_color = ~new_color | old_color;
break;
case GE_LOGIC_NAND:
new_color = ~(new_color & old_color);
break;
case GE_LOGIC_SET:
new_color = 0xFFFFFFFF;
break;
}
}
new_color = (new_color & ~gstate.getColorMask()) | (old_color & gstate.getColorMask());
SetPixelColor(p.x, p.y, new_color);