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Merge pull request #517 from bunnei/blend-factors 

Pica: Implement blend factors.
This commit is contained in:
Tony Wasserka 2015-02-01 12:00:10 +01:00
parent c915d0b727 72cc512b1e
commit e1f9f9ea04
2 changed files with 67 additions and 10 deletions
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27
src/video_core/pica.h
View File

@ -332,11 +332,21 @@ struct Regs {
};
enum BlendFactor : u32 {
Zero = 0,
One = 1,
SourceAlpha = 6,
OneMinusSourceAlpha = 7,
Zero = 0,
One = 1,
SourceColor = 2,
OneMinusSourceColor = 3,
DestColor = 4,
OneMinusDestColor = 5,
SourceAlpha = 6,
OneMinusSourceAlpha = 7,
DestAlpha = 8,
OneMinusDestAlpha = 9,
ConstantColor = 10,
OneMinusConstantColor = 11,
ConstantAlpha = 12,
OneMinusConstantAlpha = 13,
SourceAlphaSaturate = 14
};
BitField< 0, 8, BlendEquation> blend_equation_rgb;
@ -357,7 +367,12 @@ struct Regs {
BitField<0, 4, Op> op;
} logic_op;
INSERT_PADDING_WORDS(0x1);
union {
BitField< 0, 8, u32> r;
BitField< 8, 8, u32> g;
BitField<16, 8, u32> b;
BitField<24, 8, u32> a;
} blend_const;
union {
BitField< 0, 1, u32> enable;

50
src/video_core/rasterizer.cpp
View File

@ -528,18 +528,48 @@ void ProcessTriangle(const VertexShader::OutputVertex& v0,
auto params = registers.output_merger.alpha_blending;
auto LookupFactorRGB = [&](decltype(params)::BlendFactor factor) -> Math::Vec3<u8> {
switch(factor) {
switch (factor) {
case params.Zero:
return Math::Vec3<u8>(0, 0, 0);
case params.One:
return Math::Vec3<u8>(255, 255, 255);
case params.SourceColor:
return combiner_output.rgb();
case params.OneMinusSourceColor:
return Math::Vec3<u8>(255 - combiner_output.r(), 255 - combiner_output.g(), 255 - combiner_output.b());
case params.DestColor:
return dest.rgb();
case params.OneMinusDestColor:
return Math::Vec3<u8>(255 - dest.r(), 255 - dest.g(), 255 - dest.b());
case params.SourceAlpha:
return Math::MakeVec(combiner_output.a(), combiner_output.a(), combiner_output.a());
return Math::Vec3<u8>(combiner_output.a(), combiner_output.a(), combiner_output.a());
case params.OneMinusSourceAlpha:
return Math::Vec3<u8>(255-combiner_output.a(), 255-combiner_output.a(), 255-combiner_output.a());
return Math::Vec3<u8>(255 - combiner_output.a(), 255 - combiner_output.a(), 255 - combiner_output.a());
case params.DestAlpha:
return Math::Vec3<u8>(dest.a(), dest.a(), dest.a());
case params.OneMinusDestAlpha:
return Math::Vec3<u8>(255 - dest.a(), 255 - dest.a(), 255 - dest.a());
case params.ConstantColor:
return Math::Vec3<u8>(registers.output_merger.blend_const.r, registers.output_merger.blend_const.g, registers.output_merger.blend_const.b);
case params.OneMinusConstantColor:
return Math::Vec3<u8>(255 - registers.output_merger.blend_const.r, 255 - registers.output_merger.blend_const.g, 255 - registers.output_merger.blend_const.b);
case params.ConstantAlpha:
return Math::Vec3<u8>(registers.output_merger.blend_const.a, registers.output_merger.blend_const.a, registers.output_merger.blend_const.a);
case params.OneMinusConstantAlpha:
return Math::Vec3<u8>(255 - registers.output_merger.blend_const.a, 255 - registers.output_merger.blend_const.a, 255 - registers.output_merger.blend_const.a);
default:
LOG_CRITICAL(HW_GPU, "Unknown color blend factor %x", factor);
@ -549,7 +579,7 @@ void ProcessTriangle(const VertexShader::OutputVertex& v0,
};
auto LookupFactorA = [&](decltype(params)::BlendFactor factor) -> u8 {
switch(factor) {
switch (factor) {
case params.Zero:
return 0;
@ -562,6 +592,18 @@ void ProcessTriangle(const VertexShader::OutputVertex& v0,
case params.OneMinusSourceAlpha:
return 255 - combiner_output.a();
case params.DestAlpha:
return dest.a();
case params.OneMinusDestAlpha:
return 255 - dest.a();
case params.ConstantAlpha:
return registers.output_merger.blend_const.a;
case params.OneMinusConstantAlpha:
return 255 - registers.output_merger.blend_const.a;
default:
LOG_CRITICAL(HW_GPU, "Unknown alpha blend factor %x", factor);
exit(0);