diff options
| author |  bunnei <bunneidev@gmail.com> | 2015-01-26 21:10:09 -0500 |
|---|---|---|
| committer | bunnei <bunneidev@gmail.com> | 2015-01-27 14:39:17 -0500 |
| commit | b2c55bf772f2436db04357c2689302b98d9f0b26 (patch) | |
| tree | 6033ef7dc8357d8425a075565f4357abf69cde2f /src/video_core/rasterizer.cpp | |
| parent | b101e6312fecace119275b47fb5dfb33ad22cfc9 (diff) | |
Rasterizer: Implemented alpha testing.
Diffstat (limited to 'src/video_core/rasterizer.cpp')
| -rw-r--r-- | src/video_core/rasterizer.cpp | 45 |
1 files changed, 41 insertions, 4 deletions
diff --git a/src/video_core/rasterizer.cpp b/src/video_core/rasterizer.cpp index 219a1bbb..15715c43 100644 --- a/src/video_core/rasterizer.cpp +++ b/src/video_core/rasterizer.cpp @@ -431,6 +431,47 @@ void ProcessTriangle(const VertexShader::OutputVertex& v0, combiner_output = Math::MakeVec(color_output, alpha_output); } + if (registers.output_merger.alpha_test.enable) { + bool pass = false; + + switch (registers.output_merger.alpha_test.func) { + case registers.output_merger.Never: + pass = false; + break; + + case registers.output_merger.Always: + pass = true; + break; + + case registers.output_merger.Equal: + pass = combiner_output.a() == registers.output_merger.alpha_test.ref; + break; + + case registers.output_merger.NotEqual: + pass = combiner_output.a() != registers.output_merger.alpha_test.ref; + break; + + case registers.output_merger.LessThan: + pass = combiner_output.a() < registers.output_merger.alpha_test.ref; + break; + + case registers.output_merger.LessThanOrEqual: + pass = combiner_output.a() <= registers.output_merger.alpha_test.ref; + break; + + case registers.output_merger.GreaterThan: + pass = combiner_output.a() > registers.output_merger.alpha_test.ref; + break; + + case registers.output_merger.GreaterThanOrEqual: + pass = combiner_output.a() >= registers.output_merger.alpha_test.ref; + break; + } + + if (!pass) + continue; + } + // TODO: Does depth indeed only get written even if depth testing is enabled? if (registers.output_merger.depth_test_enable) { u16 z = (u16)(-(v0.screenpos[2].ToFloat32() * w0 + @@ -472,10 +513,6 @@ void ProcessTriangle(const VertexShader::OutputVertex& v0, case registers.output_merger.GreaterThanOrEqual: pass = z >= ref_z; break; - - default: - LOG_ERROR(HW_GPU, "Unknown depth test function %x", registers.output_merger.depth_test_func.Value()); - break; } if (!pass) |