Adds renderbuffer and framebuffer tracking so we can

clear the buffers.

Note: I did not actually write the clearing code
or the binding code. Will do in another CL after
Al checks in his code.

TEST=unit tests
BUG=none

Review URL: http://codereview.chromium.org/1243002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@42577 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 90 insertions, 0 deletions

diff --git a/gpu/command_buffer/service/renderbuffer_manager.h b/gpu/command_buffer/service/renderbuffer_manager.h
new file mode 100644
index 0000000..47c5282
--- /dev/null
+++ b/gpu/command_buffer/service/renderbuffer_manager.h
@@ -0,0 +1,90 @@
+// Copyright (c) 2010 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_RENDERBUFFER_MANAGER_H_
+#define GPU_COMMAND_BUFFER_SERVICE_RENDERBUFFER_MANAGER_H_
+
+#include <map>
+#include "base/basictypes.h"
+#include "base/logging.h"
+#include "base/ref_counted.h"
+#include "base/scoped_ptr.h"
+#include "gpu/command_buffer/service/gl_utils.h"
+
+namespace gpu {
+namespace gles2 {
+
+// This class keeps track of the renderbuffers and whether or not they have
+// been cleared.
+class RenderbufferManager {
+ public:
+  // Info about Renderbuffers currently in the system.
+  class RenderbufferInfo : public base::RefCounted<RenderbufferInfo> {
+   public:
+    typedef scoped_refptr<RenderbufferInfo> Ref;
+
+    explicit RenderbufferInfo(GLuint renderbuffer_id)
+        : renderbuffer_id_(renderbuffer_id),
+          cleared_(false) {
+    }
+
+    GLuint renderbuffer_id() const {
+      return renderbuffer_id_;
+    }
+
+    bool cleared() const {
+      return cleared_;
+    }
+
+    void set_cleared() {
+      cleared_ = true;
+    }
+
+    bool IsDeleted() {
+      return renderbuffer_id_ == 0;
+    }
+
+   private:
+    friend class RenderbufferManager;
+    friend class base::RefCounted<RenderbufferInfo>;
+
+    ~RenderbufferInfo() { }
+
+    void MarkAsDeleted() {
+      renderbuffer_id_ = 0;
+    }
+
+    // Service side renderbuffer id.
+    GLuint renderbuffer_id_;
+
+    // Whether this renderbuffer has been cleared
+    bool cleared_;
+  };
+
+  RenderbufferManager() { }
+
+  // Creates a RenderbufferInfo for the given renderbuffer.
+  void CreateRenderbufferInfo(GLuint renderbuffer_id);
+
+  // Gets the renderbuffer info for the given renderbuffer.
+  RenderbufferInfo* GetRenderbufferInfo(GLuint renderbuffer_id);
+
+  // Removes a renderbuffer info for the given renderbuffer.
+  void RemoveRenderbufferInfo(GLuint renderbuffer_id);
+
+ private:
+  // Info for each renderbuffer in the system.
+  // TODO(gman): Choose a faster container.
+  typedef std::map<GLuint, RenderbufferInfo::Ref> RenderbufferInfoMap;
+  RenderbufferInfoMap renderbuffer_infos_;
+
+  DISALLOW_COPY_AND_ASSIGN(RenderbufferManager);
+};
+
+}  // namespace gles2
+}  // namespace gpu
+
+#endif  // GPU_COMMAND_BUFFER_SERVICE_RENDERBUFFER_MANAGER_H_
+
+