gpu/command_buffer/service/mailbox_manager_impl.cc

   1 // Copyright 2014 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 "gpu/command_buffer/service/mailbox_manager_impl.h"
   6
   7 #include <algorithm>
   8
   9 #include "gpu/command_buffer/service/texture_manager.h"
  10
  11 namespace gpu {
  12 namespace gles2 {
  13
  14 MailboxManagerImpl::MailboxManagerImpl() {
  15 }
  16
  17 MailboxManagerImpl::~MailboxManagerImpl() {
  18   DCHECK(mailbox_to_textures_.empty());
  19   DCHECK(textures_to_mailboxes_.empty());
  20 }
  21
  22 bool MailboxManagerImpl::UsesSync() {
  23   return false;
  24 }
  25
  26 Texture* MailboxManagerImpl::ConsumeTexture(const Mailbox& mailbox) {
  27   MailboxToTextureMap::iterator it =
  28       mailbox_to_textures_.find(mailbox);
  29   if (it != mailbox_to_textures_.end())
  30     return it->second->first;
  31
  32   return NULL;
  33 }
  34
  35 void MailboxManagerImpl::ProduceTexture(const Mailbox& mailbox,
  36                                         Texture* texture) {
  37   MailboxToTextureMap::iterator it = mailbox_to_textures_.find(mailbox);
  38   if (it != mailbox_to_textures_.end()) {
  39     if (it->second->first == texture)
  40       return;
  41     TextureToMailboxMap::iterator texture_it = it->second;
  42     mailbox_to_textures_.erase(it);
  43     textures_to_mailboxes_.erase(texture_it);
  44   }
  45   InsertTexture(mailbox, texture);
  46 }
  47
  48 void MailboxManagerImpl::InsertTexture(const Mailbox& mailbox,
  49                                        Texture* texture) {
  50   texture->SetMailboxManager(this);
  51   TextureToMailboxMap::iterator texture_it =
  52       textures_to_mailboxes_.insert(std::make_pair(texture, mailbox));
  53   mailbox_to_textures_.insert(std::make_pair(mailbox, texture_it));
  54   DCHECK_EQ(mailbox_to_textures_.size(), textures_to_mailboxes_.size());
  55 }
  56
  57 void MailboxManagerImpl::TextureDeleted(Texture* texture) {
  58   std::pair<TextureToMailboxMap::iterator,
  59             TextureToMailboxMap::iterator> range =
  60       textures_to_mailboxes_.equal_range(texture);
  61   for (TextureToMailboxMap::iterator it = range.first;
  62        it != range.second; ++it) {
  63     size_t count = mailbox_to_textures_.erase(it->second);
  64     DCHECK(count == 1);
  65   }
  66   textures_to_mailboxes_.erase(range.first, range.second);
  67   DCHECK_EQ(mailbox_to_textures_.size(), textures_to_mailboxes_.size());
  68 }
  69
  70 }  // namespace gles2
  71 }  // namespace gpu