Mailbox support for texture layers.

cc/transferable_resource.h

 // Copyright 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 CC_TRANSFERABLE_RESOURCE_H_
 #define CC_TRANSFERABLE_RESOURCE_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
+#include "base/callback.h"
 #include "cc/cc_export.h"
 #include "ui/gfx/size.h"
 
 namespace cc {
 
 struct CC_EXPORT Mailbox {
   Mailbox();
+  ~Mailbox();
   bool isZero() const;
   void setName(const int8* name);
   int8 name[64];
+  base::Callback<void(unsigned)> releaseCallback;

[danakj, 2013/01/07 21:10:59]

oh I see.

How about Mailbox::ReleaseCallback, and have texture layer etc use that?

[piman, 2013/01/08 01:45:34]

NAK here, this is intended to be a serialized type and we shouldn't serialize a
callback.
The callback should directly be on the ResourceProvider::Resource, there's no
particular reason it needs to be on the Mailbox.

 };
 
 struct CC_EXPORT TransferableResource {
   TransferableResource();
   ~TransferableResource();
 
   unsigned id;
   uint32 format;
   uint32 filter;
   gfx::Size size;
   Mailbox mailbox;
 };
 
 typedef std::vector<TransferableResource> TransferableResourceArray;
 
 struct CC_EXPORT TransferableResourceList {
   TransferableResourceList();
   ~TransferableResourceList();
 
   TransferableResourceArray resources;
   unsigned sync_point;
 };
 
 }  // namespace cc
 
 #endif  // CC_TRANSFERABLE_RESOURCE_H_