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(const gpu::Mailbox& mailbox,
  32                                uint32 target,
  33                                uint32 sync_point,
  34                                const gfx::Size& size_in_pixels,
  35                                bool allow_overlay)
  36     : mailbox_holder_(mailbox, target, sync_point),
  37       shared_bitmap_(nullptr),
  38       size_in_pixels_(size_in_pixels),
  39       allow_overlay_(allow_overlay),
  40       nearest_neighbor_(false) {
  41   DCHECK_IMPLIES(allow_overlay, !size_in_pixels.IsEmpty());
  42 }
  43
  44 TextureMailbox::TextureMailbox(SharedBitmap* shared_bitmap,
  45                                const gfx::Size& size_in_pixels)
  46     : shared_bitmap_(shared_bitmap),
  47       size_in_pixels_(size_in_pixels),
  48       allow_overlay_(false),
  49       nearest_neighbor_(false) {
  50   // If an embedder of cc gives an invalid TextureMailbox, we should crash
  51   // here to identify the offender.
  52   CHECK(SharedBitmap::VerifySizeInBytes(size_in_pixels_));
  53 }
  54
  55 TextureMailbox::~TextureMailbox() {}
  56
  57 bool TextureMailbox::Equals(const TextureMailbox& other) const {
  58   if (other.IsTexture()) {
  59     return IsTexture() && !memcmp(mailbox_holder_.mailbox.name,
  60                                   other.mailbox_holder_.mailbox.name,
  61                                   sizeof(mailbox_holder_.mailbox.name));
  62   } else if (other.IsSharedMemory()) {
  63     return IsSharedMemory() && (shared_bitmap_ == other.shared_bitmap_);
  64   }
  65
  66   DCHECK(!other.IsValid());
  67   return !IsValid();
  68 }
  69
  70 size_t TextureMailbox::SharedMemorySizeInBytes() const {
  71   // UncheckedSizeInBytes is okay because we VerifySizeInBytes in the
  72   // constructor and the field is immutable.
  73   return SharedBitmap::UncheckedSizeInBytes(size_in_pixels_);
  74 }
  75
  76 }  // namespace cc