Optimize GLES2DecoderImpl::ApplyDirtyState.

gpu/command_buffer/service/context_state.h

Index: gpu/command_buffer/service/context_state.h
diff --git a/gpu/command_buffer/service/context_state.h b/gpu/command_buffer/service/context_state.h
index 83818e9b0511a4cbed1666a0d80ba1534e551e65..e436e74e280a4a65636beefc1989feadc4d67ee4 100644
--- a/gpu/command_buffer/service/context_state.h
+++ b/gpu/command_buffer/service/context_state.h
@@ -101,6 +101,10 @@ struct GPU_EXPORT ContextState {
 
   void Initialize();
 
+  void SetIgnoreCachedStateForTest(bool ignore) {
+    ignore_cached_state = ignore;
+  }
+
   void RestoreState(const ContextState* prev_state) const;
   void InitCapabilities(const ContextState* prev_state) const;
   void InitState(const ContextState* prev_state) const;
@@ -126,6 +130,44 @@ struct GPU_EXPORT ContextState {
       GLenum pname, GLfloat* params, GLsizei* num_written) const;
   bool GetEnabled(GLenum cap) const;
 
+  inline void SetDeviceColorMask(GLboolean red,
+                                 GLboolean green,
+                                 GLboolean blue,
+                                 GLboolean alpha) {
+    if (cached_color_mask_red == red && cached_color_mask_green == green &&
+        cached_color_mask_blue == blue && cached_color_mask_alpha == alpha &&
+        !ignore_cached_state)
+      return;
+    cached_color_mask_red = red;
+    cached_color_mask_green = green;
+    cached_color_mask_blue = blue;
+    cached_color_mask_alpha = alpha;
+    glColorMask(red, green, blue, alpha);
+  }
+
+  inline void SetDeviceDepthMask(GLboolean mask) {
+    if (cached_depth_mask == mask && !ignore_cached_state)
+      return;
+    cached_depth_mask = mask;
+    glDepthMask(mask);
+  }
+
+  inline void SetDeviceStencilMaskSeparate(GLenum op, GLuint mask) {
+    if (op == GL_FRONT) {
+      if (cached_stencil_front_writemask == mask && !ignore_cached_state)
+        return;
+      cached_stencil_front_writemask = mask;
+    } else if (op == GL_BACK) {
+      if (cached_stencil_back_writemask == mask && !ignore_cached_state)
+        return;
+      cached_stencil_back_writemask = mask;
+    } else {
+      NOTREACHED();
+      return;
+    }
+    glStencilMaskSeparate(op, mask);
+  }
+
   ErrorState* GetErrorState();
 
   #include "gpu/command_buffer/service/context_state_autogen.h"
@@ -162,6 +204,7 @@ struct GPU_EXPORT ContextState {
   QueryMap current_queries;
 
   bool pack_reverse_row_order;
+  bool ignore_cached_state;
 
   mutable bool fbo_binding_for_scissor_workaround_dirty_;
   FeatureInfo* feature_info_;