command_buffer: Defer restoring of FBO bindings when changing virtual contexts

gpu/command_buffer/service/framebuffer_manager.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef GPU_COMMAND_BUFFER_SERVICE_FRAMEBUFFER_MANAGER_H_
 #define GPU_COMMAND_BUFFER_SERVICE_FRAMEBUFFER_MANAGER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 217 matching lines @@
   std::unique_ptr<GLenum[]> draw_buffers_;
 
   GLenum read_buffer_;
 
   DISALLOW_COPY_AND_ASSIGN(Framebuffer);
 };
 
 struct DecoderFramebufferState {
   DecoderFramebufferState();
   ~DecoderFramebufferState();
+  bool is_draw_binding_dirty() const { return draw_binding_dirty_; }
+  bool is_read_binding_dirty() const { return read_binding_dirty_; }
+
+  void set_draw_framebuffer_clear_state_dirty(bool flag) {
+    draw_framebuffer_clear_state_dirty_ = flag;
+  }
+  bool is_draw_framebuffer_clear_state_dirty() const {
+    return draw_framebuffer_clear_state_dirty_;
+  }
+
+  void set_bound_draw_framebuffer(Framebuffer* framebuffer);
+  void set_bound_read_framebuffer(Framebuffer* framebuffer);
+  Framebuffer* bound_draw_framebuffer() const {
+    return bound_draw_framebuffer_.get();
+  }
+  Framebuffer* bound_read_framebuffer() const {
+    return bound_read_framebuffer_.get();
+  }
+  void SetBoundFramebuffer(GLenum target, Framebuffer* framebuffer);
+  bool IsBindingDirty(GLenum target) const;
+  void MarkBindingDirty(GLenum target);
+  void MarkBindingClean(GLenum target);
+
+  void NotifyFramebufferChanged(Framebuffer* framebuffer);
+  void NotifyBoundFramebuffersChanged();
+
+ private:
+  // OpenGL FBO bindings have been modified and do not reflect
+  // bound_read_framebuffer and bound_draw_framebuffer.
+  bool draw_binding_dirty_;
+  bool read_binding_dirty_;
 
   // State saved for clearing so we can clear render buffers and then
   // restore to these values.
-  bool clear_state_dirty;
+  bool draw_framebuffer_clear_state_dirty_;
 
   // The currently bound framebuffers
-  scoped_refptr<Framebuffer> bound_read_framebuffer;
-  scoped_refptr<Framebuffer> bound_draw_framebuffer;
+  scoped_refptr<Framebuffer> bound_read_framebuffer_;
+  scoped_refptr<Framebuffer> bound_draw_framebuffer_;
 };
 
 // This class keeps track of the frambebuffers and their attached renderbuffers
 // so we can correctly clear them.
 class GPU_EXPORT FramebufferManager {
  public:
   FramebufferManager(uint32_t max_draw_buffers,
                      uint32_t max_color_attachments,
                      ContextType context_type,
                      const scoped_refptr<FramebufferCompletenessCache>&
@@ skipping 64 matching lines @@
 
   scoped_refptr<FramebufferCompletenessCache> framebuffer_combo_complete_cache_;
 
   DISALLOW_COPY_AND_ASSIGN(FramebufferManager);
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_FRAMEBUFFER_MANAGER_H_