cc/output/texture_mailbox_deleter.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CC_OUTPUT_TEXTURE_MAILBOX_DELETER_H_
   6 #define CC_OUTPUT_TEXTURE_MAILBOX_DELETER_H_
   7
   8 #include "base/memory/weak_ptr.h"
   9 #include "cc/base/cc_export.h"
  10 #include "cc/base/scoped_ptr_vector.h"
  11
  12 namespace base {
  13 class SingleThreadTaskRunner;
  14 }
  15
  16 namespace cc {
  17 class ContextProvider;
  18 class SingleReleaseCallback;
  19
  20 class CC_EXPORT TextureMailboxDeleter {
  21  public:
  22   // task_runner corresponds with the thread the delete task should be posted
  23   // to. If null, the delete will happen on the calling thread.
  24   explicit TextureMailboxDeleter(
  25       const scoped_refptr<base::SingleThreadTaskRunner>& task_runner);
  26   ~TextureMailboxDeleter();
  27
  28   // Returns a Callback that can be used as the ReleaseCallback for a
  29   // TextureMailbox attached to the |texture_id|. The ReleaseCallback can
  30   // be passed to other threads and will destroy the texture, once it is
  31   // run, on the impl thread. If the TextureMailboxDeleter is destroyed
  32   // due to the compositor shutting down, then the ReleaseCallback will
  33   // become a no-op and the texture will be deleted immediately on the
  34   // impl thread, along with dropping the reference to the ContextProvider.
  35   scoped_ptr<SingleReleaseCallback> GetReleaseCallback(
  36       const scoped_refptr<ContextProvider>& context_provider,
  37       unsigned texture_id);
  38
  39  private:
  40   // Runs the |impl_callback| to delete the texture and removes the callback
  41   // from the |impl_callbacks_| list.
  42   void RunDeleteTextureOnImplThread(SingleReleaseCallback* impl_callback,
  43                                     uint32 sync_point,
  44                                     bool is_lost);
  45
  46   scoped_refptr<base::SingleThreadTaskRunner> impl_task_runner_;
  47   ScopedPtrVector<SingleReleaseCallback> impl_callbacks_;
  48   base::WeakPtrFactory<TextureMailboxDeleter> weak_ptr_factory_;
  49 };
  50
  51 }  // namespace cc
  52
  53 #endif  // CC_OUTPUT_TEXTURE_MAILBOX_DELETER_H_