cc/resources/texture_mailbox.cc

   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 #include "cc/resources/texture_mailbox.h"
   6
   7 #include "base/logging.h"
   8 #include "cc/resources/shared_bitmap.h"
   9
  10 namespace cc {
  11
  12 TextureMailbox::TextureMailbox() : shared_bitmap_(NULL) {
  13 }
  14
  15 TextureMailbox::TextureMailbox(const gpu::MailboxHolder& mailbox_holder)
  16     : mailbox_holder_(mailbox_holder),
  17       shared_bitmap_(NULL),
  18       allow_overlay_(false),
  19       nearest_neighbor_(false) {
  20 }
  21
  22 TextureMailbox::TextureMailbox(const gpu::Mailbox& mailbox,
  23                                uint32 target,
  24                                uint32 sync_point)
  25     : mailbox_holder_(mailbox, target, sync_point),
  26       shared_bitmap_(NULL),
  27       allow_overlay_(false),
  28       nearest_neighbor_(false) {
  29 }
  30
  31 TextureMailbox::TextureMailbox(SharedBitmap* shared_bitmap,
  32                                const gfx::Size& size)
  33     : shared_bitmap_(shared_bitmap),
  34       shared_memory_size_(size),
  35       allow_overlay_(false),
  36       nearest_neighbor_(false) {
  37   // If an embedder of cc gives an invalid TextureMailbox, we should crash
  38   // here to identify the offender.
  39   CHECK(SharedBitmap::VerifySizeInBytes(shared_memory_size_));
  40 }
  41
  42 TextureMailbox::~TextureMailbox() {}
  43
  44 bool TextureMailbox::Equals(const TextureMailbox& other) const {
  45   if (other.IsTexture()) {
  46     return IsTexture() && !memcmp(mailbox_holder_.mailbox.name,
  47                                   other.mailbox_holder_.mailbox.name,
  48                                   sizeof(mailbox_holder_.mailbox.name));
  49   } else if (other.IsSharedMemory()) {
  50     return IsSharedMemory() && (shared_bitmap_ == other.shared_bitmap_);
  51   }
  52
  53   DCHECK(!other.IsValid());
  54   return !IsValid();
  55 }
  56
  57 size_t TextureMailbox::SharedMemorySizeInBytes() const {
  58   // UncheckedSizeInBytes is okay because we VerifySizeInBytes in the
  59   // constructor and the field is immutable.
  60   return SharedBitmap::UncheckedSizeInBytes(shared_memory_size_);
  61 }
  62
  63 }  // namespace cc