[GPU] Move gamma ramp tracking to CommandProcessor.

src/xenia/gpu/command_processor.h

@@ -58,6 +58,50 @@ enum class SwapMode {
   kIgnored,
 };
 
+enum class GammaRampType {
+  kUnknown = 0,
+  kNormal,
+  kPWL,
+};
+
+struct GammaRamp {
+  struct NormalEntry {
+    union {
+      struct {
+        uint32_t r : 10;
+        uint32_t g : 10;
+        uint32_t b : 10;
+        uint32_t : 2;
+      };
+      uint32_t value;
+    };
+  };
+
+  struct PWLValue {
+    union {
+      struct {
+        uint16_t base;
+        uint16_t delta;
+      };
+      uint32_t value;
+    };
+  };
+
+  struct PWLEntry {
+    union {
+      struct {
+        PWLValue r;
+        PWLValue g;
+        PWLValue b;
+      };
+      PWLValue values[3];
+    };
+  };
+
+  NormalEntry normal[256];
+  PWLEntry pwl[256];
+};
+
 class CommandProcessor {
  public:
   CommandProcessor(GraphicsSystem* graphics_system,
@@ -119,6 +163,8 @@ class CommandProcessor {
 
   virtual void WriteRegister(uint32_t index, uint32_t value);
 
+  void UpdateGammaRampValue(GammaRampType type, uint32_t value);
+
   virtual void MakeCoherent();
   virtual void PrepareForWait();
   virtual void ReturnFromWait();
@@ -237,6 +283,10 @@ class CommandProcessor {
   Shader* active_pixel_shader_ = nullptr;
 
   bool paused_ = false;
+
+  GammaRamp gamma_ramp_ = {};
+  int gamma_ramp_rw_subindex_ = 0;
+  bool dirty_gamma_ramp_ = true;
 };
 
 }  // namespace gpu