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 #include "third_party/khronos/GLES2/gl2.h"
10
11 namespace cc {
12
TextureMailbox()13 TextureMailbox::TextureMailbox() : shared_memory_(NULL) {}
14
TextureMailbox(const gpu::MailboxHolder & mailbox_holder)15 TextureMailbox::TextureMailbox(const gpu::MailboxHolder& mailbox_holder)
16 : mailbox_holder_(mailbox_holder),
17 shared_memory_(NULL),
18 allow_overlay_(false) {}
19
TextureMailbox(const gpu::Mailbox & mailbox,uint32 target,uint32 sync_point)20 TextureMailbox::TextureMailbox(const gpu::Mailbox& mailbox,
21 uint32 target,
22 uint32 sync_point)
23 : mailbox_holder_(mailbox, target, sync_point),
24 shared_memory_(NULL),
25 allow_overlay_(false) {}
26
TextureMailbox(base::SharedMemory * shared_memory,const gfx::Size & size)27 TextureMailbox::TextureMailbox(base::SharedMemory* shared_memory,
28 const gfx::Size& size)
29 : shared_memory_(shared_memory),
30 shared_memory_size_(size),
31 allow_overlay_(false) {
32 // If an embedder of cc gives an invalid TextureMailbox, we should crash
33 // here to identify the offender.
34 CHECK(SharedBitmap::VerifySizeInBytes(shared_memory_size_));
35 }
36
~TextureMailbox()37 TextureMailbox::~TextureMailbox() {}
38
Equals(const TextureMailbox & other) const39 bool TextureMailbox::Equals(const TextureMailbox& other) const {
40 if (other.IsTexture()) {
41 return IsTexture() && !memcmp(mailbox_holder_.mailbox.name,
42 other.mailbox_holder_.mailbox.name,
43 sizeof(mailbox_holder_.mailbox.name));
44 } else if (other.IsSharedMemory()) {
45 return IsSharedMemory() &&
46 shared_memory_->handle() == other.shared_memory_->handle();
47 }
48
49 DCHECK(!other.IsValid());
50 return !IsValid();
51 }
52
SharedMemorySizeInBytes() const53 size_t TextureMailbox::SharedMemorySizeInBytes() const {
54 // UncheckedSizeInBytes is okay because we VerifySizeInBytes in the
55 // constructor and the field is immutable.
56 return SharedBitmap::UncheckedSizeInBytes(shared_memory_size_);
57 }
58
59 } // namespace cc
60