Added support for OES_vertex_array_object to the command buffer

BUG=72612


Review URL: https://chromiumcodereview.appspot.com/10915244

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@158967 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 67 insertions, 0 deletions

diff --git a/gpu/command_buffer/service/vertex_array_manager.h b/gpu/command_buffer/service/vertex_array_manager.h
new file mode 100644
index 0000000..1a1fc4a
--- /dev/null
+++ b/gpu/command_buffer/service/vertex_array_manager.h
@@ -0,0 +1,67 @@
+// 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_VERTEX_ARRAY_MANAGER_H_
+#define GPU_COMMAND_BUFFER_SERVICE_VERTEX_ARRAY_MANAGER_H_
+
+#include "base/basictypes.h"
+#include "base/hash_tables.h"
+#include "base/logging.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 VertexAttribManager;
+
+// This class keeps track of the vertex arrays and their sizes so we can do
+// bounds checking.
+class GPU_EXPORT VertexArrayManager {
+ public:
+  VertexArrayManager();
+  ~VertexArrayManager();
+
+  // Must call before destruction.
+  void Destroy(bool have_context);
+
+  // Creates a VertexArrayInfo for the given vertex array.
+  void CreateVertexAttribManager(GLuint client_id, GLuint service_id,
+      uint32 num_vertex_attribs);
+
+  // Gets the vertex attrib manager for the given vertex array.
+  VertexAttribManager* GetVertexAttribManager(GLuint client_id);
+
+  // Removes the vertex attrib manager for the given vertex array.
+  void RemoveVertexAttribManager(GLuint client_id);
+
+  // Gets a client id for a given service id.
+  bool GetClientId(GLuint service_id, GLuint* client_id) const;
+
+ private:
+  friend class VertexAttribManager;
+
+  void StartTracking(VertexAttribManager* vertex_attrib_manager);
+  void StopTracking(VertexAttribManager* vertex_attrib_manager);
+
+  // Info for each vertex array in the system.
+  typedef base::hash_map<GLuint, scoped_refptr<VertexAttribManager> >
+      VertexAttribManagerMap;
+  VertexAttribManagerMap vertex_attrib_managers_;
+
+  // Counts the number of VertexArrayInfo allocated with 'this' as its manager.
+  // Allows to check no VertexArrayInfo will outlive this.
+  unsigned int vertex_attrib_manager_count_;
+
+  bool have_context_;
+
+  DISALLOW_COPY_AND_ASSIGN(VertexArrayManager);
+};
+
+}  // namespace gles2
+}  // namespace gpu
+
+#endif  // GPU_COMMAND_BUFFER_SERVICE_VERTEX_ARRAY_MANAGER_H_