cc/resources/texture_mailbox.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_RESOURCES_TEXTURE_MAILBOX_H_
   6 #define CC_RESOURCES_TEXTURE_MAILBOX_H_
   7
   8 #include <string>
   9
  10 #include "base/callback.h"
  11 #include "base/memory/shared_memory.h"
  12 #include "base/numerics/safe_math.h"
  13 #include "cc/base/cc_export.h"
  14 #include "gpu/command_buffer/common/mailbox_holder.h"
  15 #include "ui/gfx/size.h"
  16
  17 namespace cc {
  18
  19 // TODO(skaslev, danakj) Rename this class more apropriately since now it
  20 // can hold a shared memory resource as well as a texture mailbox.
  21 class CC_EXPORT TextureMailbox {
  22  public:
  23   TextureMailbox();
  24   explicit TextureMailbox(const gpu::MailboxHolder& mailbox_holder);
  25   TextureMailbox(const gpu::Mailbox& mailbox, uint32 target, uint32 sync_point);
  26   TextureMailbox(base::SharedMemory* shared_memory, const gfx::Size& size);
  27
  28   ~TextureMailbox();
  29
  30   bool IsValid() const { return IsTexture() || IsSharedMemory(); }
  31   bool IsTexture() const { return !mailbox_holder_.mailbox.IsZero(); }
  32   bool IsSharedMemory() const { return shared_memory_ != NULL; }
  33
  34   bool Equals(const TextureMailbox&) const;
  35
  36   const gpu::Mailbox& mailbox() const { return mailbox_holder_.mailbox; }
  37   const int8* name() const { return mailbox().name; }
  38   uint32 target() const { return mailbox_holder_.texture_target; }
  39   uint32 sync_point() const { return mailbox_holder_.sync_point; }
  40   void set_sync_point(int32 sync_point) {
  41     mailbox_holder_.sync_point = sync_point;
  42   }
  43
  44   bool allow_overlay() const { return allow_overlay_; }
  45   void set_allow_overlay(bool allow_overlay) { allow_overlay_ = allow_overlay; }
  46
  47   base::SharedMemory* shared_memory() const { return shared_memory_; }
  48   gfx::Size shared_memory_size() const { return shared_memory_size_; }
  49
  50   size_t SharedMemorySizeInBytes() const;
  51   base::CheckedNumeric<size_t> CheckedSharedMemorySizeInBytes() const;
  52
  53  private:
  54   gpu::MailboxHolder mailbox_holder_;
  55   base::SharedMemory* shared_memory_;
  56   gfx::Size shared_memory_size_;
  57   bool allow_overlay_;
  58 };
  59
  60 }  // namespace cc
  61
  62 #endif  // CC_RESOURCES_TEXTURE_MAILBOX_H_