root/cc/test/test_web_graphics_context_3d.cc

DEFINITIONS

1. next_texture_id
2. Create
3. weak_ptr_factory_
4. CreateNamespace
5. reshapeWithScaleFactor
6. isContextLost
7. checkFramebufferStatus
8. getUniformLocation
9. getVertexAttribOffset
10. isBuffer
11. isEnabled
12. isFramebuffer
13. isProgram
14. isRenderbuffer
15. isShader
16. isTexture
17. genBuffers
18. genFramebuffers
19. genRenderbuffers
20. genTextures
21. deleteBuffers
22. deleteFramebuffers
23. deleteRenderbuffers
24. deleteTextures
25. createBuffer
26. createFramebuffer
27. createRenderbuffer
28. createTexture
29. deleteBuffer
30. deleteFramebuffer
31. deleteRenderbuffer
32. deleteTexture
33. createProgram
34. createShader
35. createExternalTexture
36. deleteProgram
37. deleteShader
38. attachShader
39. useProgram
40. bindFramebuffer
41. bindRenderbuffer
42. bindTexture
43. BoundTextureId
44. BoundTexture
45. CheckTextureIsBound
46. createQueryEXT
47. endQueryEXT
48. getQueryObjectuivEXT
49. getIntegerv
50. getProgramiv
51. getShaderiv
52. getShaderPrecisionFormat
53. genMailboxCHROMIUM
54. loseContextCHROMIUM
55. finish
56. flush
57. getAttribLocation
58. getError
59. bindBuffer
60. bufferData
61. mapBufferCHROMIUM
62. unmapBufferCHROMIUM
63. createImageCHROMIUM
64. destroyImageCHROMIUM
65. getImageParameterivCHROMIUM
66. mapImageCHROMIUM
67. unmapImageCHROMIUM
68. insertSyncPoint
69. waitSyncPoint
70. NumTextures
71. TextureAt
72. NextTextureId
73. RetireTextureId
74. NextBufferId
75. RetireBufferId
76. NextImageId
77. RetireImageId
78. GetTransferBufferMemoryUsedBytes
79. SetMaxTransferBufferUsageBytes
80. BindTexture
81. texParameteri
82. getTexParameteriv
83. UnbindTexture
84. BoundTexture
85. size

// Copyright 2013 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 "cc/test/test_web_graphics_context_3d.h"

#include <algorithm>
#include <string>

#include "base/bind.h"
#include "base/lazy_instance.h"
#include "base/logging.h"
#include "base/message_loop/message_loop.h"
#include "cc/test/test_context_support.h"
#include "gpu/GLES2/gl2extchromium.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/khronos/GLES2/gl2ext.h"

namespace cc {

static const GLuint kFramebufferId = 1;
static const GLuint kRenderbufferId = 2;

static unsigned s_context_id = 1;

const GLuint TestWebGraphicsContext3D::kExternalTextureId = 1337;

static base::LazyInstance<base::Lock>::Leaky
    g_shared_namespace_lock = LAZY_INSTANCE_INITIALIZER;

TestWebGraphicsContext3D::Namespace*
    TestWebGraphicsContext3D::shared_namespace_ = NULL;

TestWebGraphicsContext3D::Namespace::Namespace()
    : next_buffer_id(1),
      next_image_id(1),
      next_texture_id(1) {
}

TestWebGraphicsContext3D::Namespace::~Namespace() {
  g_shared_namespace_lock.Get().AssertAcquired();
  if (shared_namespace_ == this)
    shared_namespace_ = NULL;
}

// static
scoped_ptr<TestWebGraphicsContext3D> TestWebGraphicsContext3D::Create() {
  return make_scoped_ptr(new TestWebGraphicsContext3D());
}

TestWebGraphicsContext3D::TestWebGraphicsContext3D()
    : context_id_(s_context_id++),
      times_bind_texture_succeeds_(-1),
      times_end_query_succeeds_(-1),
      context_lost_(false),
      times_map_image_chromium_succeeds_(-1),
      times_map_buffer_chromium_succeeds_(-1),
      next_program_id_(1000),
      next_shader_id_(2000),
      max_texture_size_(2048),
      reshape_called_(false),
      width_(0),
      height_(0),
      scale_factor_(-1.f),
      test_support_(NULL),
      last_update_type_(NoUpdate),
      next_insert_sync_point_(1),
      last_waited_sync_point_(0),
      bound_buffer_(0),
      peak_transfer_buffer_memory_used_bytes_(0),
      weak_ptr_factory_(this) {
  CreateNamespace();
}

TestWebGraphicsContext3D::~TestWebGraphicsContext3D() {
  base::AutoLock lock(g_shared_namespace_lock.Get());
  namespace_ = NULL;
}

void TestWebGraphicsContext3D::CreateNamespace() {
  base::AutoLock lock(g_shared_namespace_lock.Get());
  if (shared_namespace_) {
    namespace_ = shared_namespace_;
  } else {
    namespace_ = new Namespace;
    shared_namespace_ = namespace_.get();
  }
}

void TestWebGraphicsContext3D::reshapeWithScaleFactor(
    int width, int height, float scale_factor) {
  reshape_called_ = true;
  width_ = width;
  height_ = height;
  scale_factor_ = scale_factor;
}

bool TestWebGraphicsContext3D::isContextLost() {
  return context_lost_;
}

GLenum TestWebGraphicsContext3D::checkFramebufferStatus(
    GLenum target) {
  if (context_lost_)
    return GL_FRAMEBUFFER_UNDEFINED_OES;
  return GL_FRAMEBUFFER_COMPLETE;
}

GLint TestWebGraphicsContext3D::getUniformLocation(
    GLuint program,
    const GLchar* name) {
  return 0;
}

GLsizeiptr TestWebGraphicsContext3D::getVertexAttribOffset(
    GLuint index,
    GLenum pname) {
  return 0;
}

GLboolean TestWebGraphicsContext3D::isBuffer(
    GLuint buffer) {
  return false;
}

GLboolean TestWebGraphicsContext3D::isEnabled(
    GLenum cap) {
  return false;
}

GLboolean TestWebGraphicsContext3D::isFramebuffer(
    GLuint framebuffer) {
  return false;
}

GLboolean TestWebGraphicsContext3D::isProgram(
    GLuint program) {
  return false;
}

GLboolean TestWebGraphicsContext3D::isRenderbuffer(
    GLuint renderbuffer) {
  return false;
}

GLboolean TestWebGraphicsContext3D::isShader(
    GLuint shader) {
  return false;
}

GLboolean TestWebGraphicsContext3D::isTexture(
    GLuint texture) {
  return false;
}

void TestWebGraphicsContext3D::genBuffers(GLsizei count, GLuint* ids) {
  for (int i = 0; i < count; ++i)
    ids[i] = NextBufferId();
}

void TestWebGraphicsContext3D::genFramebuffers(
    GLsizei count, GLuint* ids) {
  for (int i = 0; i < count; ++i)
    ids[i] = kFramebufferId | context_id_ << 16;
}

void TestWebGraphicsContext3D::genRenderbuffers(
    GLsizei count, GLuint* ids) {
  for (int i = 0; i < count; ++i)
    ids[i] = kRenderbufferId | context_id_ << 16;
}

void TestWebGraphicsContext3D::genTextures(GLsizei count, GLuint* ids) {
  for (int i = 0; i < count; ++i) {
    ids[i] = NextTextureId();
    DCHECK_NE(ids[i], kExternalTextureId);
  }
  base::AutoLock lock(namespace_->lock);
  for (int i = 0; i < count; ++i)
    namespace_->textures.Append(ids[i], new TestTexture());
}

void TestWebGraphicsContext3D::deleteBuffers(GLsizei count, GLuint* ids) {
  for (int i = 0; i < count; ++i)
    RetireBufferId(ids[i]);
}

void TestWebGraphicsContext3D::deleteFramebuffers(
    GLsizei count, GLuint* ids) {
  for (int i = 0; i < count; ++i)
    DCHECK_EQ(kFramebufferId | context_id_ << 16, ids[i]);
}

void TestWebGraphicsContext3D::deleteRenderbuffers(
    GLsizei count, GLuint* ids) {
  for (int i = 0; i < count; ++i)
    DCHECK_EQ(kRenderbufferId | context_id_ << 16, ids[i]);
}

void TestWebGraphicsContext3D::deleteTextures(GLsizei count, GLuint* ids) {
  for (int i = 0; i < count; ++i)
    RetireTextureId(ids[i]);
  base::AutoLock lock(namespace_->lock);
  for (int i = 0; i < count; ++i) {
    namespace_->textures.Remove(ids[i]);
    texture_targets_.UnbindTexture(ids[i]);
  }
}

GLuint TestWebGraphicsContext3D::createBuffer() {
  GLuint id;
  genBuffers(1, &id);
  return id;
}

GLuint TestWebGraphicsContext3D::createFramebuffer() {
  GLuint id;
  genFramebuffers(1, &id);
  return id;
}

GLuint TestWebGraphicsContext3D::createRenderbuffer() {
  GLuint id;
  genRenderbuffers(1, &id);
  return id;
}

GLuint TestWebGraphicsContext3D::createTexture() {
  GLuint id;
  genTextures(1, &id);
  return id;
}

void TestWebGraphicsContext3D::deleteBuffer(GLuint id) {
  deleteBuffers(1, &id);
}

void TestWebGraphicsContext3D::deleteFramebuffer(GLuint id) {
  deleteFramebuffers(1, &id);
}

void TestWebGraphicsContext3D::deleteRenderbuffer(GLuint id) {
  deleteRenderbuffers(1, &id);
}

void TestWebGraphicsContext3D::deleteTexture(GLuint id) {
  deleteTextures(1, &id);
}

unsigned TestWebGraphicsContext3D::createProgram() {
  unsigned program = next_program_id_++ | context_id_ << 16;
  program_set_.insert(program);
  return program;
}

GLuint TestWebGraphicsContext3D::createShader(GLenum) {
  unsigned shader = next_shader_id_++ | context_id_ << 16;
  shader_set_.insert(shader);
  return shader;
}

GLuint TestWebGraphicsContext3D::createExternalTexture() {
  base::AutoLock lock(namespace_->lock);
  namespace_->textures.Append(kExternalTextureId, new TestTexture());
  return kExternalTextureId;
}

void TestWebGraphicsContext3D::deleteProgram(GLuint id) {
  if (!program_set_.count(id))
    ADD_FAILURE() << "deleteProgram called on unknown program " << id;
  program_set_.erase(id);
}

void TestWebGraphicsContext3D::deleteShader(GLuint id) {
  if (!shader_set_.count(id))
    ADD_FAILURE() << "deleteShader called on unknown shader " << id;
  shader_set_.erase(id);
}

void TestWebGraphicsContext3D::attachShader(GLuint program, GLuint shader) {
  if (!program_set_.count(program))
    ADD_FAILURE() << "attachShader called with unknown program " << program;
  if (!shader_set_.count(shader))
    ADD_FAILURE() << "attachShader called with unknown shader " << shader;
}

void TestWebGraphicsContext3D::useProgram(GLuint program) {
  if (!program)
    return;
  if (!program_set_.count(program))
    ADD_FAILURE() << "useProgram called on unknown program " << program;
}

void TestWebGraphicsContext3D::bindFramebuffer(
    GLenum target, GLuint framebuffer) {
  if (!framebuffer)
    return;
  DCHECK_EQ(kFramebufferId | context_id_ << 16, framebuffer);
}

void TestWebGraphicsContext3D::bindRenderbuffer(
      GLenum target, GLuint renderbuffer) {
  if (!renderbuffer)
    return;
  DCHECK_EQ(kRenderbufferId | context_id_ << 16, renderbuffer);
}

void TestWebGraphicsContext3D::bindTexture(
    GLenum target, GLuint texture_id) {
  if (times_bind_texture_succeeds_ >= 0) {
    if (!times_bind_texture_succeeds_) {
      loseContextCHROMIUM(GL_GUILTY_CONTEXT_RESET_ARB,
                          GL_INNOCENT_CONTEXT_RESET_ARB);
    }
    --times_bind_texture_succeeds_;
  }

  if (!texture_id)
    return;
  base::AutoLock lock(namespace_->lock);
  DCHECK(namespace_->textures.ContainsId(texture_id));
  texture_targets_.BindTexture(target, texture_id);
  used_textures_.insert(texture_id);
}

GLuint TestWebGraphicsContext3D::BoundTextureId(
    GLenum target) {
  return texture_targets_.BoundTexture(target);
}

scoped_refptr<TestTexture> TestWebGraphicsContext3D::BoundTexture(
    GLenum target) {
  // The caller is expected to lock the namespace for texture access.
  namespace_->lock.AssertAcquired();
  return namespace_->textures.TextureForId(BoundTextureId(target));
}

void TestWebGraphicsContext3D::CheckTextureIsBound(GLenum target) {
  DCHECK(BoundTextureId(target));
}

GLuint TestWebGraphicsContext3D::createQueryEXT() { return 1u; }

void TestWebGraphicsContext3D::endQueryEXT(GLenum target) {
  if (times_end_query_succeeds_ >= 0) {
    if (!times_end_query_succeeds_) {
      loseContextCHROMIUM(GL_GUILTY_CONTEXT_RESET_ARB,
                          GL_INNOCENT_CONTEXT_RESET_ARB);
    }
    --times_end_query_succeeds_;
  }
}

void TestWebGraphicsContext3D::getQueryObjectuivEXT(
    GLuint query,
    GLenum pname,
    GLuint* params) {
  // If the context is lost, behave as if result is available.
  if (pname == GL_QUERY_RESULT_AVAILABLE_EXT)
    *params = 1;
}

void TestWebGraphicsContext3D::getIntegerv(
    GLenum pname,
    GLint* value) {
  if (pname == GL_MAX_TEXTURE_SIZE)
    *value = max_texture_size_;
  else if (pname == GL_ACTIVE_TEXTURE)
    *value = GL_TEXTURE0;
}

void TestWebGraphicsContext3D::getProgramiv(GLuint program,
                                            GLenum pname,
                                            GLint* value) {
  if (pname == GL_LINK_STATUS)
    *value = 1;
}

void TestWebGraphicsContext3D::getShaderiv(GLuint shader,
                                           GLenum pname,
                                           GLint* value) {
  if (pname == GL_COMPILE_STATUS)
    *value = 1;
}

void TestWebGraphicsContext3D::getShaderPrecisionFormat(GLenum shadertype,
                                                        GLenum precisiontype,
                                                        GLint* range,
                                                        GLint* precision) {
  // Return the minimum precision requirements of the GLES2
  // specification.
  switch (precisiontype) {
    case GL_LOW_INT:
      range[0] = 8;
      range[1] = 8;
      *precision = 0;
      break;
    case GL_MEDIUM_INT:
      range[0] = 10;
      range[1] = 10;
      *precision = 0;
      break;
    case GL_HIGH_INT:
      range[0] = 16;
      range[1] = 16;
      *precision = 0;
      break;
    case GL_LOW_FLOAT:
      range[0] = 8;
      range[1] = 8;
      *precision = 8;
      break;
    case GL_MEDIUM_FLOAT:
      range[0] = 14;
      range[1] = 14;
      *precision = 10;
      break;
    case GL_HIGH_FLOAT:
      range[0] = 62;
      range[1] = 62;
      *precision = 16;
      break;
    default:
      NOTREACHED();
      break;
  }
}

void TestWebGraphicsContext3D::genMailboxCHROMIUM(GLbyte* mailbox) {
  static char mailbox_name1 = '1';
  static char mailbox_name2 = '1';
  mailbox[0] = mailbox_name1;
  mailbox[1] = mailbox_name2;
  mailbox[2] = '\0';
  if (++mailbox_name1 == 0) {
    mailbox_name1 = '1';
    ++mailbox_name2;
  }
}

void TestWebGraphicsContext3D::loseContextCHROMIUM(GLenum current,
                                                   GLenum other) {
  if (context_lost_)
    return;
  context_lost_ = true;
  if (!context_lost_callback_.is_null())
    context_lost_callback_.Run();

  for (size_t i = 0; i < shared_contexts_.size(); ++i)
    shared_contexts_[i]->loseContextCHROMIUM(current, other);
  shared_contexts_.clear();
}

void TestWebGraphicsContext3D::finish() {
  test_support_->CallAllSyncPointCallbacks();
}

void TestWebGraphicsContext3D::flush() {
  test_support_->CallAllSyncPointCallbacks();
}

GLint TestWebGraphicsContext3D::getAttribLocation(GLuint program,
                                                  const GLchar* name) {
  return 0;
}

GLenum TestWebGraphicsContext3D::getError() { return GL_NO_ERROR; }

void TestWebGraphicsContext3D::bindBuffer(GLenum target,
                                          GLuint buffer) {
  bound_buffer_ = buffer;
  if (!bound_buffer_)
    return;
  unsigned context_id = buffer >> 16;
  unsigned buffer_id = buffer & 0xffff;
  base::AutoLock lock(namespace_->lock);
  DCHECK(buffer_id);
  DCHECK_LT(buffer_id, namespace_->next_buffer_id);
  DCHECK_EQ(context_id, context_id_);

  base::ScopedPtrHashMap<unsigned, Buffer>& buffers = namespace_->buffers;
  if (buffers.count(bound_buffer_) == 0)
    buffers.set(bound_buffer_, make_scoped_ptr(new Buffer).Pass());

  buffers.get(bound_buffer_)->target = target;
}

void TestWebGraphicsContext3D::bufferData(GLenum target,
                                          GLsizeiptr size,
                                          const void* data,
                                          GLenum usage) {
  base::AutoLock lock(namespace_->lock);
  base::ScopedPtrHashMap<unsigned, Buffer>& buffers = namespace_->buffers;
  DCHECK_GT(buffers.count(bound_buffer_), 0u);
  DCHECK_EQ(target, buffers.get(bound_buffer_)->target);
  Buffer* buffer = buffers.get(bound_buffer_);
  if (context_lost_) {
    buffer->pixels.reset();
    return;
  }

  buffer->pixels.reset(new uint8[size]);
  buffer->size = size;
  if (data != NULL)
    memcpy(buffer->pixels.get(), data, size);

  peak_transfer_buffer_memory_used_bytes_ =
      std::max(peak_transfer_buffer_memory_used_bytes_,
               GetTransferBufferMemoryUsedBytes());
}

void* TestWebGraphicsContext3D::mapBufferCHROMIUM(GLenum target,
                                                  GLenum access) {
  base::AutoLock lock(namespace_->lock);
  base::ScopedPtrHashMap<unsigned, Buffer>& buffers = namespace_->buffers;
  DCHECK_GT(buffers.count(bound_buffer_), 0u);
  DCHECK_EQ(target, buffers.get(bound_buffer_)->target);
  if (times_map_buffer_chromium_succeeds_ >= 0) {
    if (!times_map_buffer_chromium_succeeds_) {
      return NULL;
    }
    --times_map_buffer_chromium_succeeds_;
  }

  peak_transfer_buffer_memory_used_bytes_ =
      std::max(peak_transfer_buffer_memory_used_bytes_,
               GetTransferBufferMemoryUsedBytes());

  return buffers.get(bound_buffer_)->pixels.get();
}

GLboolean TestWebGraphicsContext3D::unmapBufferCHROMIUM(
    GLenum target) {
  base::AutoLock lock(namespace_->lock);
  base::ScopedPtrHashMap<unsigned, Buffer>& buffers = namespace_->buffers;
  DCHECK_GT(buffers.count(bound_buffer_), 0u);
  DCHECK_EQ(target, buffers.get(bound_buffer_)->target);
  buffers.get(bound_buffer_)->pixels.reset();
  return true;
}

GLuint TestWebGraphicsContext3D::createImageCHROMIUM(
      GLsizei width, GLsizei height,
      GLenum internalformat) {
  DCHECK_EQ(GL_RGBA8_OES, static_cast<int>(internalformat));
  GLuint image_id = NextImageId();
  base::AutoLock lock(namespace_->lock);
  base::ScopedPtrHashMap<unsigned, Image>& images = namespace_->images;
  images.set(image_id, make_scoped_ptr(new Image).Pass());
  images.get(image_id)->pixels.reset(new uint8[width * height * 4]);
  return image_id;
}

void TestWebGraphicsContext3D::destroyImageCHROMIUM(
    GLuint id) {
  RetireImageId(id);
}

void TestWebGraphicsContext3D::getImageParameterivCHROMIUM(
    GLuint image_id,
    GLenum pname,
    GLint* params) {
  base::AutoLock lock(namespace_->lock);
  DCHECK_GT(namespace_->images.count(image_id), 0u);
  DCHECK_EQ(GL_IMAGE_ROWBYTES_CHROMIUM, static_cast<int>(pname));
  *params = 0;
}

void* TestWebGraphicsContext3D::mapImageCHROMIUM(GLuint image_id,
                                                 GLenum access) {
  base::AutoLock lock(namespace_->lock);
  base::ScopedPtrHashMap<unsigned, Image>& images = namespace_->images;
  DCHECK_GT(images.count(image_id), 0u);
  if (times_map_image_chromium_succeeds_ >= 0) {
    if (!times_map_image_chromium_succeeds_) {
      return NULL;
    }
    --times_map_image_chromium_succeeds_;
  }
  return images.get(image_id)->pixels.get();
}

void TestWebGraphicsContext3D::unmapImageCHROMIUM(
    GLuint image_id) {
  base::AutoLock lock(namespace_->lock);
  DCHECK_GT(namespace_->images.count(image_id), 0u);
}

unsigned TestWebGraphicsContext3D::insertSyncPoint() {
  return next_insert_sync_point_++;
}

void TestWebGraphicsContext3D::waitSyncPoint(unsigned sync_point) {
  if (sync_point)
    last_waited_sync_point_ = sync_point;
}

size_t TestWebGraphicsContext3D::NumTextures() const {
  base::AutoLock lock(namespace_->lock);
  return namespace_->textures.Size();
}

GLuint TestWebGraphicsContext3D::TextureAt(int i) const {
  base::AutoLock lock(namespace_->lock);
  return namespace_->textures.IdAt(i);
}

GLuint TestWebGraphicsContext3D::NextTextureId() {
  base::AutoLock lock(namespace_->lock);
  GLuint texture_id = namespace_->next_texture_id++;
  DCHECK(texture_id < (1 << 16));
  texture_id |= context_id_ << 16;
  return texture_id;
}

void TestWebGraphicsContext3D::RetireTextureId(GLuint id) {
  base::AutoLock lock(namespace_->lock);
  unsigned context_id = id >> 16;
  unsigned texture_id = id & 0xffff;
  DCHECK(texture_id);
  DCHECK_LT(texture_id, namespace_->next_texture_id);
  DCHECK_EQ(context_id, context_id_);
}

GLuint TestWebGraphicsContext3D::NextBufferId() {
  base::AutoLock lock(namespace_->lock);
  GLuint buffer_id = namespace_->next_buffer_id++;
  DCHECK(buffer_id < (1 << 16));
  buffer_id |= context_id_ << 16;
  return buffer_id;
}

void TestWebGraphicsContext3D::RetireBufferId(GLuint id) {
  base::AutoLock lock(namespace_->lock);
  unsigned context_id = id >> 16;
  unsigned buffer_id = id & 0xffff;
  DCHECK(buffer_id);
  DCHECK_LT(buffer_id, namespace_->next_buffer_id);
  DCHECK_EQ(context_id, context_id_);
}

GLuint TestWebGraphicsContext3D::NextImageId() {
  base::AutoLock lock(namespace_->lock);
  GLuint image_id = namespace_->next_image_id++;
  DCHECK(image_id < (1 << 16));
  image_id |= context_id_ << 16;
  return image_id;
}

void TestWebGraphicsContext3D::RetireImageId(GLuint id) {
  base::AutoLock lock(namespace_->lock);
  unsigned context_id = id >> 16;
  unsigned image_id = id & 0xffff;
  DCHECK(image_id);
  DCHECK_LT(image_id, namespace_->next_image_id);
  DCHECK_EQ(context_id, context_id_);
}

size_t TestWebGraphicsContext3D::GetTransferBufferMemoryUsedBytes() const {
  size_t total_bytes = 0;
  base::ScopedPtrHashMap<unsigned, Buffer>& buffers = namespace_->buffers;
  base::ScopedPtrHashMap<unsigned, Buffer>::iterator it = buffers.begin();
  for (; it != buffers.end(); ++it) {
    Buffer* buffer = it->second;
    if (buffer->target == GL_PIXEL_UNPACK_TRANSFER_BUFFER_CHROMIUM)
      total_bytes += buffer->size;
  }
  return total_bytes;
}

void TestWebGraphicsContext3D::SetMaxTransferBufferUsageBytes(
    size_t max_transfer_buffer_usage_bytes) {
  test_capabilities_.max_transfer_buffer_usage_bytes =
      max_transfer_buffer_usage_bytes;
}

TestWebGraphicsContext3D::TextureTargets::TextureTargets() {
  // Initialize default bindings.
  bound_textures_[GL_TEXTURE_2D] = 0;
  bound_textures_[GL_TEXTURE_EXTERNAL_OES] = 0;
  bound_textures_[GL_TEXTURE_RECTANGLE_ARB] = 0;
}

TestWebGraphicsContext3D::TextureTargets::~TextureTargets() {}

void TestWebGraphicsContext3D::TextureTargets::BindTexture(
    GLenum target,
    GLuint id) {
  // Make sure this is a supported target by seeing if it was bound to before.
  DCHECK(bound_textures_.find(target) != bound_textures_.end());
  bound_textures_[target] = id;
}

void TestWebGraphicsContext3D::texParameteri(GLenum target,
                                             GLenum pname,
                                             GLint param) {
  CheckTextureIsBound(target);
  base::AutoLock lock_for_texture_access(namespace_->lock);
  scoped_refptr<TestTexture> texture = BoundTexture(target);
  DCHECK(texture->IsValidParameter(pname));
  texture->params[pname] = param;
}

void TestWebGraphicsContext3D::getTexParameteriv(GLenum target,
                                                 GLenum pname,
                                                 GLint* value) {
  CheckTextureIsBound(target);
  base::AutoLock lock_for_texture_access(namespace_->lock);
  scoped_refptr<TestTexture> texture = BoundTexture(target);
  DCHECK(texture->IsValidParameter(pname));
  TestTexture::TextureParametersMap::iterator it = texture->params.find(pname);
  if (it != texture->params.end())
    *value = it->second;
}

void TestWebGraphicsContext3D::TextureTargets::UnbindTexture(
    GLuint id) {
  // Bind zero to any targets that the id is bound to.
  for (TargetTextureMap::iterator it = bound_textures_.begin();
       it != bound_textures_.end();
       it++) {
    if (it->second == id)
      it->second = 0;
  }
}

GLuint TestWebGraphicsContext3D::TextureTargets::BoundTexture(
    GLenum target) {
  DCHECK(bound_textures_.find(target) != bound_textures_.end());
  return bound_textures_[target];
}

TestWebGraphicsContext3D::Buffer::Buffer() : target(0), size(0) {}

TestWebGraphicsContext3D::Buffer::~Buffer() {}

TestWebGraphicsContext3D::Image::Image() {}

TestWebGraphicsContext3D::Image::~Image() {}

}  // namespace cc