Add subscribeUniform extension pipeline

gpu/command_buffer/service/valuebuffer_manager.h

Index: gpu/command_buffer/service/valuebuffer_manager.h
diff --git a/gpu/command_buffer/service/valuebuffer_manager.h b/gpu/command_buffer/service/valuebuffer_manager.h
new file mode 100644
index 0000000000000000000000000000000000000000..3cc4ac194a8a5ac73eb08dffe9cb34347c9419b3
--- /dev/null
+++ b/gpu/command_buffer/service/valuebuffer_manager.h
@@ -0,0 +1,123 @@
+// Copyright (c) 2014 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_VALUEBUFFER_MANAGER_H_
+#define GPU_COMMAND_BUFFER_SERVICE_VALUEBUFFER_MANAGER_H_
+
+#include "base/basictypes.h"
+#include "base/containers/hash_tables.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+#include "gpu/command_buffer/service/gl_utils.h"
+#include "gpu/gpu_export.h"
+
+namespace gpu {
+namespace gles2 {
+
+class ValuebufferManager;
+
+union ValueState {
+  float float_value[4];
+  int int_value[4];
+};
+
+class GPU_EXPORT Valuebuffer : public base::RefCounted<Valuebuffer> {
+ public:
+  Valuebuffer(ValuebufferManager* manager, GLuint client_id);
+
+  GLuint client_id() const { return client_id_; }
+
+  bool IsDeleted() const { return client_id_ == 0; }
+
+  void MarkAsValid() { has_been_bound_ = true; }
+
+  bool IsValid() const { return has_been_bound_ && !IsDeleted(); }
+
+  void AddSubscription(GLenum subscription);
+  void RemoveSubscription(GLenum subscription);
+
+  // Returns true if this Valuebuffer is subscribed to subscription
+  bool IsSubscribed(GLenum subscription);
+
+  // Returns the active state for a given target in this Valuebuffer
+  // returns NULL if target state doesn't exist
+  const ValueState* GetState(GLenum target) const;
+
+ private:
+  friend class ValuebufferManager;
+  friend class base::RefCounted<Valuebuffer>;
+
+  typedef base::hash_map<GLenum, ValueState> StateMap;
+  typedef base::hash_set<GLenum> SubscriptionSet;
+
+  ~Valuebuffer();
+
+  void UpdateState(const StateMap& pending_state);
+
+  void MarkAsDeleted() { client_id_ = 0; }
+
+  // ValuebufferManager that owns this Valuebuffer.
+  ValuebufferManager* manager_;
+
+  // Client side Valuebuffer id.
+  GLuint client_id_;
+
+  // Whether this Valuebuffer has ever been bound.
+  bool has_been_bound_;
+
+  SubscriptionSet subscriptions_;
+
+  StateMap active_state_map_;
+};
+
+class GPU_EXPORT ValuebufferManager {
+ public:
+  ValuebufferManager();
+  ~ValuebufferManager();
+
+  // Must call before destruction.
+  void Destroy();
+
+  // Creates a Valuebuffer for the given Valuebuffer ids.
+  void CreateValuebuffer(GLuint client_id);
+
+  // Gets the Valuebuffer for the given Valuebuffer id.
+  Valuebuffer* GetValuebuffer(GLuint client_id);
+
+  // Removes a Valuebuffer for the given Valuebuffer id.
+  void RemoveValuebuffer(GLuint client_id);
+
+  // Updates the value state for the given Valuebuffer
+  void UpdateValuebufferState(Valuebuffer* valuebuffer);
+
+  // Gets the state for the given subscription target
+  void UpdateValueState(GLenum target, const ValueState& state);
+
+  static uint32 ApiTypeForSubscriptionTarget(GLenum target);
+
+ private:
+  friend class Valuebuffer;
+
+  typedef base::hash_map<GLuint, scoped_refptr<Valuebuffer>> ValuebufferMap;
+
+  void StartTracking(Valuebuffer* valuebuffer);
+  void StopTracking(Valuebuffer* valuebuffer);
+
+  // Counts the number of Valuebuffer allocated with 'this' as its manager.
+  // Allows to check no Valuebuffer will outlive this.
+  unsigned valuebuffer_count_;
+
+  // Info for each Valuebuffer in the system.
+  ValuebufferMap valuebuffer_map_;
+
+  // Current value state in the system
+  Valuebuffer::StateMap pending_state_map_;
+
+  DISALLOW_COPY_AND_ASSIGN(ValuebufferManager);
+};
+
+}  // namespace gles2
+}  // namespace gpu
+
+#endif  // GPU_COMMAND_BUFFER_SERVICE_VALUEBUFFER_MANAGER_H_