content/browser/compositor/owned_mailbox.h

   1 // Copyright 2014 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 CONTENT_BROWSER_COMPOSITOR_OWNED_MAILBOX_H_
   6 #define CONTENT_BROWSER_COMPOSITOR_OWNED_MAILBOX_H_
   7
   8 #include "base/memory/ref_counted.h"
   9 #include "content/browser/compositor/image_transport_factory.h"
  10 #include "content/common/content_export.h"
  11 #include "gpu/command_buffer/common/mailbox_holder.h"
  12
  13 namespace content {
  14
  15 class GLHelper;
  16
  17 // This class holds a texture id and gpu::Mailbox, and deletes the texture
  18 // id when the object itself is destroyed. Should only be created if a GLHelper
  19 // exists on the ImageTransportFactory.
  20 class CONTENT_EXPORT OwnedMailbox : public base::RefCounted<OwnedMailbox>,
  21                                     public ImageTransportFactoryObserver {
  22  public:
  23   explicit OwnedMailbox(GLHelper* gl_helper);
  24
  25   const gpu::MailboxHolder& holder() const { return mailbox_holder_; }
  26   const gpu::Mailbox& mailbox() const { return mailbox_holder_.mailbox; }
  27   uint32 texture_id() const { return texture_id_; }
  28   uint32 target() const { return mailbox_holder_.texture_target; }
  29   uint32 sync_point() const { return mailbox_holder_.sync_point; }
  30   void UpdateSyncPoint(uint32 sync_point);
  31   void Destroy();
  32
  33  protected:
  34   ~OwnedMailbox() override;
  35
  36   // ImageTransportFactoryObserver implementation.
  37   void OnLostResources() override;
  38
  39  private:
  40   friend class base::RefCounted<OwnedMailbox>;
  41
  42   uint32 texture_id_;
  43   gpu::MailboxHolder mailbox_holder_;
  44   GLHelper* gl_helper_;
  45 };
  46
  47 }  // namespace content
  48
  49 #endif  // CONTENT_BROWSER_COMPOSITOR_OWNED_MAILBOX_H_