1 // Copyright (c) 2012 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.
5 #include "gpu/command_buffer/service/mailbox_manager.h"
9 #include "crypto/random.h"
10 #include "gpu/command_buffer/service/texture_manager.h"
15 MailboxManager::MailboxManager()
16 : mailbox_to_textures_(std::ptr_fun(&MailboxManager::TargetNameLess)) {
19 MailboxManager::~MailboxManager() {
20 DCHECK(mailbox_to_textures_.empty());
21 DCHECK(textures_to_mailboxes_.empty());
24 Texture* MailboxManager::ConsumeTexture(unsigned target,
25 const Mailbox& mailbox) {
26 MailboxToTextureMap::iterator it =
27 mailbox_to_textures_.find(TargetName(target, mailbox));
28 if (it == mailbox_to_textures_.end())
31 return it->second->first;
34 void MailboxManager::ProduceTexture(unsigned target,
35 const Mailbox& mailbox,
37 texture->SetMailboxManager(this);
38 TargetName target_name(target, mailbox);
39 MailboxToTextureMap::iterator it = mailbox_to_textures_.find(target_name);
40 if (it != mailbox_to_textures_.end()) {
41 TextureToMailboxMap::iterator texture_it = it->second;
42 mailbox_to_textures_.erase(it);
43 textures_to_mailboxes_.erase(texture_it);
45 TextureToMailboxMap::iterator texture_it =
46 textures_to_mailboxes_.insert(std::make_pair(texture, target_name));
47 mailbox_to_textures_.insert(std::make_pair(target_name, texture_it));
48 DCHECK_EQ(mailbox_to_textures_.size(), textures_to_mailboxes_.size());
51 void MailboxManager::TextureDeleted(Texture* texture) {
52 std::pair<TextureToMailboxMap::iterator,
53 TextureToMailboxMap::iterator> range =
54 textures_to_mailboxes_.equal_range(texture);
55 for (TextureToMailboxMap::iterator it = range.first;
56 it != range.second; ++it) {
57 size_t count = mailbox_to_textures_.erase(it->second);
60 textures_to_mailboxes_.erase(range.first, range.second);
61 DCHECK_EQ(mailbox_to_textures_.size(), textures_to_mailboxes_.size());
64 MailboxManager::TargetName::TargetName(unsigned target, const Mailbox& mailbox)
69 bool MailboxManager::TargetNameLess(const MailboxManager::TargetName& lhs,
70 const MailboxManager::TargetName& rhs) {
71 return memcmp(&lhs, &rhs, sizeof(lhs)) < 0;