Merge pull request #535 from bunnei/color-modifiers

Implement color/alpha modifiers

3 files changed, 104 insertions, 74 deletions

diff --git a/src/video_core/math.h b/src/video_core/math.h
index 9622e761..c176b225 100644
--- a/src/video_core/math.h
+++ b/src/video_core/math.h
@@ -457,27 +457,41 @@ public:
     const T& b() const { return z; }
     const T& a() const { return w; }
 
-    // swizzlers - create a subvector of specific components
+    // Swizzlers - Create a subvector of specific components
     // e.g. Vec2 uv() { return Vec2(x,y); }
-    // _DEFINE_SWIZZLER2 defines a single such function, DEFINE_SWIZZLER2 defines all of them for all component names (x<->r) and permutations (xy<->yx)
+
+    // _DEFINE_SWIZZLER2 defines a single such function
+    // DEFINE_SWIZZLER2_COMP1 defines one-component functions for all component names (x<->r) 
+    // DEFINE_SWIZZLER2_COMP2 defines two component functions for all component names (x<->r) and permutations (xy<->yx)
 #define _DEFINE_SWIZZLER2(a, b, name) const Vec2<T> name() const { return Vec2<T>(a, b); }
-#define DEFINE_SWIZZLER2(a, b, a2, b2) \
+#define DEFINE_SWIZZLER2_COMP1(a, a2) \
+    _DEFINE_SWIZZLER2(a, a, a##a); \
+    _DEFINE_SWIZZLER2(a, a, a2##a2)
+#define DEFINE_SWIZZLER2_COMP2(a, b, a2, b2) \
     _DEFINE_SWIZZLER2(a, b, a##b); \
     _DEFINE_SWIZZLER2(a, b, a2##b2); \
     _DEFINE_SWIZZLER2(b, a, b##a); \
     _DEFINE_SWIZZLER2(b, a, b2##a2)
 
-    DEFINE_SWIZZLER2(x, y, r, g);
-    DEFINE_SWIZZLER2(x, z, r, b);
-    DEFINE_SWIZZLER2(x, w, r, a);
-    DEFINE_SWIZZLER2(y, z, g, b);
-    DEFINE_SWIZZLER2(y, w, g, a);
-    DEFINE_SWIZZLER2(z, w, b, a);
-#undef DEFINE_SWIZZLER2
+    DEFINE_SWIZZLER2_COMP2(x, y, r, g);
+    DEFINE_SWIZZLER2_COMP2(x, z, r, b);
+    DEFINE_SWIZZLER2_COMP2(x, w, r, a);
+    DEFINE_SWIZZLER2_COMP2(y, z, g, b);
+    DEFINE_SWIZZLER2_COMP2(y, w, g, a);
+    DEFINE_SWIZZLER2_COMP2(z, w, b, a);
+    DEFINE_SWIZZLER2_COMP1(x, r);
+    DEFINE_SWIZZLER2_COMP1(y, g);
+    DEFINE_SWIZZLER2_COMP1(z, b);
+    DEFINE_SWIZZLER2_COMP1(w, a);
+#undef DEFINE_SWIZZLER2_COMP1
+#undef DEFINE_SWIZZLER2_COMP2
 #undef _DEFINE_SWIZZLER2
 
 #define _DEFINE_SWIZZLER3(a, b, c, name) const Vec3<T> name() const { return Vec3<T>(a, b, c); }
-#define DEFINE_SWIZZLER3(a, b, c, a2, b2, c2) \
+#define DEFINE_SWIZZLER3_COMP1(a, a2) \
+    _DEFINE_SWIZZLER3(a, a, a, a##a##a); \
+    _DEFINE_SWIZZLER3(a, a, a, a2##a2##a2)
+#define DEFINE_SWIZZLER3_COMP3(a, b, c, a2, b2, c2) \
     _DEFINE_SWIZZLER3(a, b, c, a##b##c); \
     _DEFINE_SWIZZLER3(a, c, b, a##c##b); \
     _DEFINE_SWIZZLER3(b, a, c, b##a##c); \
@@ -491,11 +505,16 @@ public:
     _DEFINE_SWIZZLER3(c, a, b, c2##a2##b2); \
     _DEFINE_SWIZZLER3(c, b, a, c2##b2##a2)
 
-    DEFINE_SWIZZLER3(x, y, z, r, g, b);
-    DEFINE_SWIZZLER3(x, y, w, r, g, a);
-    DEFINE_SWIZZLER3(x, z, w, r, b, a);
-    DEFINE_SWIZZLER3(y, z, w, g, b, a);
-#undef DEFINE_SWIZZLER3
+    DEFINE_SWIZZLER3_COMP3(x, y, z, r, g, b);
+    DEFINE_SWIZZLER3_COMP3(x, y, w, r, g, a);
+    DEFINE_SWIZZLER3_COMP3(x, z, w, r, b, a);
+    DEFINE_SWIZZLER3_COMP3(y, z, w, g, b, a);
+    DEFINE_SWIZZLER3_COMP1(x, r);
+    DEFINE_SWIZZLER3_COMP1(y, g);
+    DEFINE_SWIZZLER3_COMP1(z, b);
+    DEFINE_SWIZZLER3_COMP1(w, a);
+#undef DEFINE_SWIZZLER3_COMP1
+#undef DEFINE_SWIZZLER3_COMP3
 #undef _DEFINE_SWIZZLER3
 };
 
diff --git a/src/video_core/pica.h b/src/video_core/pica.h
index 2506bf78..1566b890 100644
--- a/src/video_core/pica.h
+++ b/src/video_core/pica.h
@@ -233,19 +233,29 @@ struct Regs {
         };
 
         enum class ColorModifier : u32 {
-            SourceColor         = 0,
-            OneMinusSourceColor = 1,
-            SourceAlpha         = 2,
-            OneMinusSourceAlpha = 3,
-
-            // Other values seem to be non-standard extensions
+            SourceColor         = 0x0,
+            OneMinusSourceColor = 0x1,
+            SourceAlpha         = 0x2,
+            OneMinusSourceAlpha = 0x3,
+            SourceRed           = 0x4,
+            OneMinusSourceRed   = 0x5,
+
+            SourceGreen         = 0x8,
+            OneMinusSourceGreen = 0x9,
+
+            SourceBlue          = 0xc,
+            OneMinusSourceBlue  = 0xd,
         };
 
         enum class AlphaModifier : u32 {
-            SourceAlpha         = 0,
-            OneMinusSourceAlpha = 1,
-
-            // Other values seem to be non-standard extensions
+            SourceAlpha         = 0x0,
+            OneMinusSourceAlpha = 0x1,
+            SourceRed           = 0x2,
+            OneMinusSourceRed   = 0x3,
+            SourceGreen         = 0x4,
+            OneMinusSourceGreen = 0x5,
+            SourceBlue          = 0x6,
+            OneMinusSourceBlue  = 0x7,
         };
 
         enum class Operation : u32 {
diff --git a/src/video_core/rasterizer.cpp b/src/video_core/rasterizer.cpp
index 845f1c4b..5920477e 100644
--- a/src/video_core/rasterizer.cpp
+++ b/src/video_core/rasterizer.cpp
@@ -260,7 +260,7 @@ void ProcessTriangle(const VertexShader::OutputVertex& v0,
                 using AlphaModifier = Regs::TevStageConfig::AlphaModifier;
                 using Operation = Regs::TevStageConfig::Operation;
 
-                auto GetColorSource = [&](Source source) -> Math::Vec4<u8> {
+                auto GetSource = [&](Source source) -> Math::Vec4<u8> {
                     switch (source) {
                     case Source::PrimaryColor:
                         return primary_color;
@@ -287,36 +287,8 @@ void ProcessTriangle(const VertexShader::OutputVertex& v0,
                     }
                 };
 
-                auto GetAlphaSource = [&](Source source) -> u8 {
-                    switch (source) {
-                    case Source::PrimaryColor:
-                        return primary_color.a();
-
-                    case Source::Texture0:
-                        return texture_color[0].a();
-
-                    case Source::Texture1:
-                        return texture_color[1].a();
-
-                    case Source::Texture2:
-                        return texture_color[2].a();
-
-                    case Source::Constant:
-                        return tev_stage.const_a;
-
-                    case Source::Previous:
-                        return combiner_output.a();
-
-                    default:
-                        LOG_ERROR(HW_GPU, "Unknown alpha combiner source %d\n", (int)source);
-                        _dbg_assert_(HW_GPU, 0);
-                        return 0;
-                    }
-                };
-
                 static auto GetColorModifier = [](ColorModifier factor, const Math::Vec4<u8>& values) -> Math::Vec3<u8> {
-                    switch (factor)
-                    {
+                    switch (factor) {
                     case ColorModifier::SourceColor:
                         return values.rgb();
 
@@ -324,27 +296,56 @@ void ProcessTriangle(const VertexShader::OutputVertex& v0,
                         return (Math::Vec3<u8>(255, 255, 255) - values.rgb()).Cast<u8>();
 
                     case ColorModifier::SourceAlpha:
-                        return { values.a(), values.a(), values.a() };
+                        return values.aaa();
 
-                    default:
-                        LOG_ERROR(HW_GPU, "Unknown color factor %d\n", (int)factor);
-                        _dbg_assert_(HW_GPU, 0);
-                        return {};
+                    case ColorModifier::OneMinusSourceAlpha:
+                        return (Math::Vec3<u8>(255, 255, 255) - values.aaa()).Cast<u8>();
+
+                    case ColorModifier::SourceRed:
+                        return values.rrr();
+
+                    case ColorModifier::OneMinusSourceRed:
+                        return (Math::Vec3<u8>(255, 255, 255) - values.rrr()).Cast<u8>();
+
+                    case ColorModifier::SourceGreen:
+                        return values.ggg();
+
+                    case ColorModifier::OneMinusSourceGreen:
+                        return (Math::Vec3<u8>(255, 255, 255) - values.ggg()).Cast<u8>();
+
+                    case ColorModifier::SourceBlue:
+                        return values.bbb();
+
+                    case ColorModifier::OneMinusSourceBlue:
+                        return (Math::Vec3<u8>(255, 255, 255) - values.bbb()).Cast<u8>();
                     }
                 };
 
-                static auto GetAlphaModifier = [](AlphaModifier factor, u8 value) -> u8 {
+                static auto GetAlphaModifier = [](AlphaModifier factor, const Math::Vec4<u8>& values) -> u8 {
                     switch (factor) {
                     case AlphaModifier::SourceAlpha:
-                        return value;
+                        return values.a();
 
                     case AlphaModifier::OneMinusSourceAlpha:
-                        return 255 - value;
+                        return 255 - values.a();
 
-                    default:
-                        LOG_ERROR(HW_GPU, "Unknown alpha factor %d\n", (int)factor);
-                        _dbg_assert_(HW_GPU, 0);
-                        return 0;
+                    case AlphaModifier::SourceRed:
+                        return values.r();
+
+                    case AlphaModifier::OneMinusSourceRed:
+                        return 255 - values.r();
+
+                    case AlphaModifier::SourceGreen:
+                        return values.g();
+
+                    case AlphaModifier::OneMinusSourceGreen:
+                        return 255 - values.g();
+
+                    case AlphaModifier::SourceBlue:
+                        return values.b();
+
+                    case AlphaModifier::OneMinusSourceBlue:
+                        return 255 - values.b();
                     }
                 };
 
@@ -414,17 +415,17 @@ void ProcessTriangle(const VertexShader::OutputVertex& v0,
                 //       combiner_output.rgb(), but instead store it in a temporary variable until
                 //       alpha combining has been done.
                 Math::Vec3<u8> color_result[3] = {
-                    GetColorModifier(tev_stage.color_modifier1, GetColorSource(tev_stage.color_source1)),
-                    GetColorModifier(tev_stage.color_modifier2, GetColorSource(tev_stage.color_source2)),
-                    GetColorModifier(tev_stage.color_modifier3, GetColorSource(tev_stage.color_source3))
+                    GetColorModifier(tev_stage.color_modifier1, GetSource(tev_stage.color_source1)),
+                    GetColorModifier(tev_stage.color_modifier2, GetSource(tev_stage.color_source2)),
+                    GetColorModifier(tev_stage.color_modifier3, GetSource(tev_stage.color_source3))
                 };
                 auto color_output = ColorCombine(tev_stage.color_op, color_result);
 
                 // alpha combiner
                 std::array<u8,3> alpha_result = {
-                    GetAlphaModifier(tev_stage.alpha_modifier1, GetAlphaSource(tev_stage.alpha_source1)),
-                    GetAlphaModifier(tev_stage.alpha_modifier2, GetAlphaSource(tev_stage.alpha_source2)),
-                    GetAlphaModifier(tev_stage.alpha_modifier3, GetAlphaSource(tev_stage.alpha_source3))
+                    GetAlphaModifier(tev_stage.alpha_modifier1, GetSource(tev_stage.alpha_source1)),
+                    GetAlphaModifier(tev_stage.alpha_modifier2, GetSource(tev_stage.alpha_source2)),
+                    GetAlphaModifier(tev_stage.alpha_modifier3, GetSource(tev_stage.alpha_source3))
                 };
                 auto alpha_output = AlphaCombine(tev_stage.alpha_op, alpha_result);