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// Copyright 2014 The Chromium Authors
// 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 <stddef.h>
#include <algorithm>
#include "base/check_op.h"
#include "base/logging.h"
#include "gpu/command_buffer/service/texture_base.h"
namespace gpu {
namespace gles2 {
MailboxManagerImpl::MailboxManagerImpl() = default;
MailboxManagerImpl::~MailboxManagerImpl() {
DCHECK(mailbox_to_textures_.empty());
DCHECK(textures_to_mailboxes_.empty());
}
TextureBase* MailboxManagerImpl::ConsumeTexture(const Mailbox& mailbox) {
MailboxToTextureMap::iterator it =
mailbox_to_textures_.find(mailbox);
if (it != mailbox_to_textures_.end())
return it->second->first;
return nullptr;
}
void MailboxManagerImpl::ProduceTexture(const Mailbox& mailbox,
TextureBase* texture) {
DCHECK(texture);
MailboxToTextureMap::iterator it = mailbox_to_textures_.find(mailbox);
if (it != mailbox_to_textures_.end()) {
DLOG(ERROR) << "Ignored attempt to reassign a mailbox";
return;
}
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(TextureBase* 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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