cc/resources/texture_mailbox.cc

   1 // Copyright 2013 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 "cc/resources/texture_mailbox.h"
   6
   7 #include "base/logging.h"
   8 #include "third_party/khronos/GLES2/gl2.h"
   9
  10 namespace cc {
  11
  12 TextureMailbox::TextureMailbox()
  13     : target_(GL_TEXTURE_2D),
  14       sync_point_(0),
  15       shared_memory_(NULL) {
  16 }
  17
  18 TextureMailbox::TextureMailbox(const std::string& mailbox_name)
  19     : target_(GL_TEXTURE_2D),
  20       sync_point_(0),
  21       shared_memory_(NULL) {
  22   if (!mailbox_name.empty()) {
  23     CHECK(mailbox_name.size() == sizeof(name_.name));
  24     name_.SetName(reinterpret_cast<const int8*>(mailbox_name.data()));
  25   }
  26 }
  27
  28 TextureMailbox::TextureMailbox(const gpu::Mailbox& mailbox_name)
  29     : target_(GL_TEXTURE_2D),
  30       sync_point_(0),
  31       shared_memory_(NULL) {
  32   name_.SetName(mailbox_name.name);
  33 }
  34
  35 TextureMailbox::TextureMailbox(const gpu::Mailbox& mailbox_name,
  36                                unsigned sync_point)
  37     : target_(GL_TEXTURE_2D),
  38       sync_point_(sync_point),
  39       shared_memory_(NULL) {
  40   name_.SetName(mailbox_name.name);
  41 }
  42
  43 TextureMailbox::TextureMailbox(const gpu::Mailbox& mailbox_name,
  44                                unsigned texture_target,
  45                                unsigned sync_point)
  46     : target_(texture_target),
  47       sync_point_(sync_point),
  48       shared_memory_(NULL) {
  49   name_.SetName(mailbox_name.name);
  50 }
  51
  52 TextureMailbox::TextureMailbox(base::SharedMemory* shared_memory,
  53                                gfx::Size size)
  54     : target_(GL_TEXTURE_2D),
  55       sync_point_(0),
  56       shared_memory_(shared_memory),
  57       shared_memory_size_(size) {}
  58
  59 TextureMailbox::~TextureMailbox() {}
  60
  61 bool TextureMailbox::Equals(const TextureMailbox& other) const {
  62   if (other.IsTexture())
  63     return ContainsMailbox(other.name());
  64   else if (other.IsSharedMemory())
  65     return ContainsHandle(other.shared_memory_->handle());
  66
  67   DCHECK(!other.IsValid());
  68   return !IsValid();
  69 }
  70
  71 bool TextureMailbox::ContainsMailbox(const gpu::Mailbox& other) const {
  72   return IsTexture() && !memcmp(data(), other.name, sizeof(name_.name));
  73 }
  74
  75 bool TextureMailbox::ContainsHandle(base::SharedMemoryHandle handle) const {
  76   return shared_memory_ && shared_memory_->handle() == handle;
  77 }
  78
  79 void TextureMailbox::SetName(const gpu::Mailbox& name) {
  80   DCHECK(shared_memory_ == NULL);
  81   name_ = name;
  82 }
  83
  84 size_t TextureMailbox::shared_memory_size_in_bytes() const {
  85   return 4 * shared_memory_size_.GetArea();
  86 }
  87
  88 }  // namespace cc