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// Copyright 2014 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 "gpu/command_buffer/service/mailbox_manager_impl.h"
#include <algorithm>
#include "gpu/command_buffer/service/texture_manager.h"
namespace gpu {
namespace gles2 {
MailboxManagerImpl::MailboxManagerImpl() {
}
MailboxManagerImpl::~MailboxManagerImpl() {
DCHECK(mailbox_to_textures_.empty());
DCHECK(textures_to_mailboxes_.empty());
}
bool MailboxManagerImpl::UsesSync() {
return false;
}
Texture* MailboxManagerImpl::ConsumeTexture(const Mailbox& mailbox) {
MailboxToTextureMap::iterator it =
mailbox_to_textures_.find(mailbox);
if (it != mailbox_to_textures_.end())
return it->second->first;
return NULL;
}
void MailboxManagerImpl::ProduceTexture(const Mailbox& mailbox,
Texture* texture) {
MailboxToTextureMap::iterator it = mailbox_to_textures_.find(mailbox);
if (it != mailbox_to_textures_.end()) {
if (it->second->first == texture)
return;
TextureToMailboxMap::iterator texture_it = it->second;
mailbox_to_textures_.erase(it);
textures_to_mailboxes_.erase(texture_it);
}
InsertTexture(mailbox, texture);
}
void MailboxManagerImpl::InsertTexture(const Mailbox& mailbox,
Texture* texture) {
texture->SetMailboxManager(this);
TextureToMailboxMap::iterator texture_it =
textures_to_mailboxes_.insert(std::make_pair(texture, mailbox));
mailbox_to_textures_.insert(std::make_pair(mailbox, texture_it));
DCHECK_EQ(mailbox_to_textures_.size(), textures_to_mailboxes_.size());
}
void MailboxManagerImpl::TextureDeleted(Texture* texture) {
std::pair<TextureToMailboxMap::iterator,
TextureToMailboxMap::iterator> range =
textures_to_mailboxes_.equal_range(texture);
for (TextureToMailboxMap::iterator it = range.first;
it != range.second; ++it) {
size_t count = mailbox_to_textures_.erase(it->second);
DCHECK(count == 1);
}
textures_to_mailboxes_.erase(range.first, range.second);
DCHECK_EQ(mailbox_to_textures_.size(), textures_to_mailboxes_.size());
}
} // namespace gles2
} // namespace gpu
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