rasterizer: Implemented combiner output scaling.

2 files changed, 16 insertions, 2 deletions

diff --git a/src/video_core/pica.h b/src/video_core/pica.h
index 26a70003..5e169ff6 100644
--- a/src/video_core/pica.h
+++ b/src/video_core/pica.h
@@ -300,7 +300,18 @@ struct Regs {
             BitField<24, 8, u32> const_a;
         };
 
-        INSERT_PADDING_WORDS(0x1);
+        union {
+            BitField< 0, 2, u32> color_scale;
+            BitField<16, 2, u32> alpha_scale;
+        };
+
+        inline unsigned GetColorMultiplier() const {
+            return (color_scale < 3) ? (1 << color_scale) : 1;
+        }
+
+        inline unsigned GetAlphaMultiplier() const {
+            return (alpha_scale < 3) ? (1 << alpha_scale) : 1;
+        }
     };
 
     TevStageConfig tev_stage0;
diff --git a/src/video_core/rasterizer.cpp b/src/video_core/rasterizer.cpp
index f74721d4..46a326bb 100644
--- a/src/video_core/rasterizer.cpp
+++ b/src/video_core/rasterizer.cpp
@@ -597,7 +597,10 @@ static void ProcessTriangleInternal(const VertexShader::OutputVertex& v0,
                 };
                 auto alpha_output = AlphaCombine(tev_stage.alpha_op, alpha_result);
 
-                combiner_output = Math::MakeVec(color_output, alpha_output);
+                combiner_output[0] = std::min((unsigned)255, color_output.r() * tev_stage.GetColorMultiplier());
+                combiner_output[1] = std::min((unsigned)255, color_output.g() * tev_stage.GetColorMultiplier());
+                combiner_output[2] = std::min((unsigned)255, color_output.b() * tev_stage.GetColorMultiplier());
+                combiner_output[3] = std::min((unsigned)255, alpha_output * tev_stage.GetAlphaMultiplier());
 
                 if (registers.tev_combiner_buffer_input.TevStageUpdatesCombinerBufferColor(tev_stage_index)) {
                     combiner_buffer.r() = combiner_output.r();