[Aura] Added Support for rendering software compositor frames as cc::TextureLayers.

cc/resources/texture_mailbox.h

 // Copyright 2013 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 CC_RESOURCES_TEXTURE_MAILBOX_H_
 #define CC_RESOURCES_TEXTURE_MAILBOX_H_
 
 #include <string>
 
-#include "base/basictypes.h"
 #include "base/callback.h"
+#include "base/memory/shared_memory.h"
 #include "cc/base/cc_export.h"
 #include "gpu/command_buffer/common/mailbox.h"
+#include "ui/gfx/size.h"
 
 namespace cc {
 
+// TODO(skaslev, danakj) Rename this class more apropriately since now it
+// can hold a shared memory resource as well as a texture mailbox.
 class CC_EXPORT TextureMailbox {
  public:
   typedef base::Callback<void(unsigned sync_point,
                               bool lost_resource)> ReleaseCallback;
   TextureMailbox();
   TextureMailbox(const std::string& mailbox_name,
                  const ReleaseCallback& callback);
   TextureMailbox(const gpu::Mailbox& mailbox_name,
                  const ReleaseCallback& callback);
   TextureMailbox(const gpu::Mailbox& mailbox_name,
                  const ReleaseCallback& callback,
                  unsigned sync_point);
   TextureMailbox(const gpu::Mailbox& mailbox_name,
                  const ReleaseCallback& callback,
                  unsigned texture_target,
                  unsigned sync_point);
+  TextureMailbox(base::SharedMemoryHandle handle,
+                 gfx::Size size,
+                 const ReleaseCallback& callback);
 
   ~TextureMailbox();
 
+  bool IsValid() const { return IsTexture() || IsSharedMemory(); }
+  bool IsTexture() const { return !name_.IsZero(); }
+  bool IsSharedMemory() const {
+    return base::SharedMemory::IsHandleValid(handle_);
+  }
+
+  bool Equals(const TextureMailbox&) const;
+  bool Contains(const gpu::Mailbox&) const;
+  bool Contains(base::SharedMemoryHandle handle) const;

[piman, 2013/05/28 20:58:57]

nit: no overloading.

[slavi, 2013/05/29 18:31:48]

Done.

+
   const ReleaseCallback& callback() const { return callback_; }
   const int8* data() const { return name_.name; }
-  bool Equals(const gpu::Mailbox&) const;
-  bool Equals(const TextureMailbox&) const;
-  bool IsEmpty() const;
   const gpu::Mailbox& name() const { return name_; }
   void ResetSyncPoint() { sync_point_ = 0; }
   void RunReleaseCallback(unsigned sync_point, bool lost_resource) const;
   void SetName(const gpu::Mailbox&);
   unsigned target() const { return target_; }
   unsigned sync_point() const { return sync_point_; }
 
+  void SetHandle(base::SharedMemoryHandle handle, gfx::Size size);
+  base::SharedMemoryHandle handle() const { return handle_; }
+  gfx::Size size() const { return size_; }

[piman, 2013/05/28 20:58:57]

Maybe name this software_size, or shared_memory_size, to indicate that it's only
meaningful for the software path.

[slavi, 2013/05/29 18:31:48]

Done.

+
  private:
   gpu::Mailbox name_;
   ReleaseCallback callback_;
   unsigned target_;
   unsigned sync_point_;
+  base::SharedMemoryHandle handle_;
+  gfx::Size size_;
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_TEXTURE_MAILBOX_H_