diff options
| -rw-r--r-- | src/video_core/rasterizer.cpp | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/src/video_core/rasterizer.cpp b/src/video_core/rasterizer.cpp index 8dff2db27..5f7971fe2 100644 --- a/src/video_core/rasterizer.cpp +++ b/src/video_core/rasterizer.cpp @@ -25,6 +25,18 @@ static void DrawPixel(int x, int y, const Math::Vec4<u8>& color) { *(color_buffer + x + y * registers.framebuffer.GetWidth()) = value; } +static const Math::Vec4<u8> GetPixel(int x, int y) { + u32* color_buffer_u32 = reinterpret_cast<u32*>(Memory::GetPointer(PAddrToVAddr(registers.framebuffer.GetColorBufferPhysicalAddress()))); + + u32 value = *(color_buffer_u32 + x + y * registers.framebuffer.GetWidth()); + Math::Vec4<u8> ret; + ret.a() = value >> 24; + ret.r() = (value >> 16) & 0xFF; + ret.g() = (value >> 8) & 0xFF; + ret.b() = value & 0xFF; + return ret; + } + static u32 GetDepth(int x, int y) { u16* depth_buffer = reinterpret_cast<u16*>(Memory::GetPointer(PAddrToVAddr(registers.framebuffer.GetDepthBufferPhysicalAddress()))); @@ -430,6 +442,78 @@ void ProcessTriangle(const VertexShader::OutputVertex& v0, SetDepth(x >> 4, y >> 4, z); } + auto dest = GetPixel(x >> 4, y >> 4); + + if (registers.output_merger.alphablend_enable) { + auto params = registers.output_merger.alpha_blending; + + auto LookupFactorRGB = [&](decltype(params)::BlendFactor factor) -> Math::Vec3<u8> { + switch(factor) { + case params.Zero: + return Math::Vec3<u8>(0, 0, 0); + + case params.One: + return Math::Vec3<u8>(255, 255, 255); + + case params.SourceAlpha: + return Math::MakeVec(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()); + + default: + LOG_CRITICAL(HW_GPU, "Unknown color blend factor %x", factor); + exit(0); + break; + } + }; + + auto LookupFactorA = [&](decltype(params)::BlendFactor factor) -> u8 { + switch(factor) { + case params.Zero: + return 0; + + case params.One: + return 255; + + case params.SourceAlpha: + return combiner_output.a(); + + case params.OneMinusSourceAlpha: + return 255 - combiner_output.a(); + + default: + LOG_CRITICAL(HW_GPU, "Unknown alpha blend factor %x", factor); + exit(0); + break; + } + }; + + auto srcfactor = Math::MakeVec(LookupFactorRGB(params.factor_source_rgb), + LookupFactorA(params.factor_source_a)); + auto dstfactor = Math::MakeVec(LookupFactorRGB(params.factor_dest_rgb), + LookupFactorA(params.factor_dest_a)); + + switch (params.blend_equation_rgb) { + case params.Add: + { + auto result = (combiner_output * srcfactor + dest * dstfactor) / 255; + result.r() = std::min(255, result.r()); + result.g() = std::min(255, result.g()); + result.b() = std::min(255, result.b()); + combiner_output = result.Cast<u8>(); + break; + } + + default: + LOG_CRITICAL(HW_GPU, "Unknown RGB blend equation %x", params.blend_equation_rgb.Value()); + exit(0); + } + } else { + LOG_CRITICAL(HW_GPU, "logic op: %x", registers.output_merger.logic_op); + exit(0); + } + DrawPixel(x >> 4, y >> 4, combiner_output); } } |