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// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "cc/resources/texture_mailbox.h"
#include "base/logging.h"
#include "cc/resources/shared_bitmap.h"
namespace cc {
TextureMailbox::TextureMailbox() : shared_memory_(NULL) {}
TextureMailbox::TextureMailbox(const gpu::MailboxHolder& mailbox_holder)
: mailbox_holder_(mailbox_holder),
shared_memory_(NULL),
allow_overlay_(false) {}
TextureMailbox::TextureMailbox(const gpu::Mailbox& mailbox,
uint32 target,
uint32 sync_point)
: mailbox_holder_(mailbox, target, sync_point),
shared_memory_(NULL),
allow_overlay_(false) {}
TextureMailbox::TextureMailbox(base::SharedMemory* shared_memory,
const gfx::Size& size)
: shared_memory_(shared_memory),
shared_memory_size_(size),
allow_overlay_(false) {
// If an embedder of cc gives an invalid TextureMailbox, we should crash
// here to identify the offender.
CHECK(SharedBitmap::VerifySizeInBytes(shared_memory_size_));
}
TextureMailbox::~TextureMailbox() {}
bool TextureMailbox::Equals(const TextureMailbox& other) const {
if (other.IsTexture()) {
return IsTexture() && !memcmp(mailbox_holder_.mailbox.name,
other.mailbox_holder_.mailbox.name,
sizeof(mailbox_holder_.mailbox.name));
} else if (other.IsSharedMemory()) {
return IsSharedMemory() &&
shared_memory_->handle() == other.shared_memory_->handle();
}
DCHECK(!other.IsValid());
return !IsValid();
}
size_t TextureMailbox::SharedMemorySizeInBytes() const {
// UncheckedSizeInBytes is okay because we VerifySizeInBytes in the
// constructor and the field is immutable.
return SharedBitmap::UncheckedSizeInBytes(shared_memory_size_);
}
} // namespace cc
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