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// Copyright (c) 2010 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 "gpu/command_buffer/service/context_group.h"
#include "gpu/command_buffer/common/id_allocator.h"
#include "gpu/command_buffer/service/buffer_manager.h"
#include "gpu/command_buffer/service/framebuffer_manager.h"
#include "gpu/command_buffer/service/program_manager.h"
#include "gpu/command_buffer/service/renderbuffer_manager.h"
#include "gpu/command_buffer/service/shader_manager.h"
#include "gpu/command_buffer/service/texture_manager.h"
#include "gpu/GLES2/gles2_command_buffer.h"
namespace gpu {
namespace gles2 {
ContextGroup::ContextGroup()
: initialized_(false),
max_vertex_attribs_(0u),
max_texture_units_(0u),
max_texture_image_units_(0u),
max_vertex_texture_image_units_(0u),
max_fragment_uniform_vectors_(0u),
max_varying_vectors_(0u),
max_vertex_uniform_vectors_(0u) {
}
ContextGroup::~ContextGroup() {
// Check that Destroy has been called.
DCHECK(buffer_manager_ == NULL);
DCHECK(framebuffer_manager_ == NULL);
DCHECK(renderbuffer_manager_ == NULL);
DCHECK(texture_manager_ == NULL);
DCHECK(program_manager_ == NULL);
DCHECK(shader_manager_ == NULL);
}
static void GetIntegerv(GLenum pname, uint32* var) {
GLint value = 0;
glGetIntegerv(pname, &value);
*var = value;
}
bool ContextGroup::Initialize() {
if (initialized_) {
return true;
}
// Figure out what extensions to turn on.
const char* extensions =
reinterpret_cast<const char*>(glGetString(GL_EXTENSIONS));
bool npot_ok = false;
AddExtensionString("GL_CHROMIUM_map_sub");
// Check if we should allow GL_EXT_texture_compression_dxt1.
if (strstr(extensions, "GL_EXT_texture_compression_dxt1") ||
strstr(extensions, "GL_EXT_texture_compression_s3tc")) {
AddExtensionString("GL_EXT_texture_compression_dxt1");
validators_.compressed_texture_format.AddValue(
GL_COMPRESSED_RGB_S3TC_DXT1_EXT);
validators_.compressed_texture_format.AddValue(
GL_COMPRESSED_RGBA_S3TC_DXT1_EXT);
}
// Check if we should allow GL_EXT_texture_format_BGRA8888
if (strstr(extensions, "GL_EXT_texture_format_BGRA8888") ||
strstr(extensions, "GL_APPLE_texture_format_BGRA8888") ||
strstr(extensions, "GL_EXT_bgra")) {
AddExtensionString("GL_EXT_texture_format_BGRA8888");
validators_.texture_internal_format.AddValue(GL_BGRA_EXT);
validators_.texture_format.AddValue(GL_BGRA_EXT);
}
// Check if we should allow GL_OES_texture_npot
if (strstr(extensions, "GL_ARB_texture_non_power_of_two") ||
strstr(extensions, "GL_OES_texture_npot")) {
AddExtensionString("GL_OES_texture_npot");
npot_ok = true;
}
// Check if we should allow GL_OES_texture_float, GL_OES_texture_half_float,
// GL_OES_texture_float_linear, GL_OES_texture_half_float_linear
bool enable_texture_float = false;
bool enable_texture_float_linear = false;
bool enable_texture_half_float = false;
bool enable_texture_half_float_linear = false;
if (strstr(extensions, "GL_ARB_texture_float")) {
enable_texture_float = true;
enable_texture_float_linear = true;
enable_texture_half_float = true;
enable_texture_half_float_linear = true;
} else {
if (strstr(extensions, "GL_OES_texture_float")) {
enable_texture_float = true;
if (strstr(extensions, "GL_OES_texture_float_linear")) {
enable_texture_float_linear = true;
}
}
if (strstr(extensions, "GL_OES_texture_half_float")) {
enable_texture_half_float = true;
if (strstr(extensions, "GL_OES_texture_half_float_linear")) {
enable_texture_half_float_linear = true;
}
}
}
if (enable_texture_float) {
validators_.pixel_type.AddValue(GL_FLOAT);
AddExtensionString("GL_OES_texture_float");
if (enable_texture_float_linear) {
AddExtensionString("GL_OES_texture_float_linear");
}
}
if (enable_texture_half_float) {
validators_.pixel_type.AddValue(GL_HALF_FLOAT_OES);
AddExtensionString("GL_OES_texture_half_float");
if (enable_texture_half_float_linear) {
AddExtensionString("GL_OES_texture_half_float_linear");
}
}
// TODO(gman): Add support for these extensions.
// GL_OES_depth24
// GL_OES_depth32
// GL_OES_packed_depth_stencil
// GL_OES_element_index_uint
buffer_manager_.reset(new BufferManager());
framebuffer_manager_.reset(new FramebufferManager());
renderbuffer_manager_.reset(new RenderbufferManager());
shader_manager_.reset(new ShaderManager());
program_manager_.reset(new ProgramManager());
// Lookup GL things we need to know.
GetIntegerv(GL_MAX_VERTEX_ATTRIBS, &max_vertex_attribs_);
const GLuint kGLES2RequiredMiniumumVertexAttribs = 8u;
DCHECK_GE(max_vertex_attribs_, kGLES2RequiredMiniumumVertexAttribs);
GetIntegerv(GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, &max_texture_units_);
const GLuint kGLES2RequiredMiniumumTextureUnits = 8u;
DCHECK_GE(max_texture_units_, kGLES2RequiredMiniumumTextureUnits);
GLint max_texture_size;
GLint max_cube_map_texture_size;
glGetIntegerv(GL_MAX_TEXTURE_SIZE, &max_texture_size);
glGetIntegerv(GL_MAX_CUBE_MAP_TEXTURE_SIZE, &max_cube_map_texture_size);
texture_manager_.reset(new TextureManager(npot_ok,
enable_texture_float_linear,
enable_texture_half_float_linear,
max_texture_size,
max_cube_map_texture_size));
GetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS, &max_texture_image_units_);
GetIntegerv(
GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS, &max_vertex_texture_image_units_);
#if defined(GLES2_GPU_SERVICE_BACKEND_NATIVE_GLES2)
GetIntegerv(GL_MAX_FRAGMENT_UNIFORM_VECTORS, &max_fragment_uniform_vectors_);
GetIntegerv(GL_MAX_VARYING_VECTORS, &max_varying_vectors_);
GetIntegerv(GL_MAX_VERTEX_UNIFORM_VECTORS, &max_vertex_uniform_vectors_);
#else // !defined(GLES2_GPU_SERVICE_BACKEND_NATIVE_GLES2)
GetIntegerv(
GL_MAX_FRAGMENT_UNIFORM_COMPONENTS, &max_fragment_uniform_vectors_);
max_fragment_uniform_vectors_ /= 4;
GetIntegerv(GL_MAX_VARYING_FLOATS, &max_varying_vectors_);
max_varying_vectors_ /= 4;
GetIntegerv(GL_MAX_VERTEX_UNIFORM_COMPONENTS, &max_vertex_uniform_vectors_);
max_vertex_uniform_vectors_ /= 4;
#endif // !defined(GLES2_GPU_SERVICE_BACKEND_NATIVE_GLES2)
initialized_ = true;
return true;
}
void ContextGroup::Destroy(bool have_context) {
if (buffer_manager_ != NULL) {
buffer_manager_->Destroy(have_context);
buffer_manager_.reset();
}
if (framebuffer_manager_ != NULL) {
framebuffer_manager_->Destroy(have_context);
framebuffer_manager_.reset();
}
if (renderbuffer_manager_ != NULL) {
renderbuffer_manager_->Destroy(have_context);
renderbuffer_manager_.reset();
}
if (texture_manager_ != NULL) {
texture_manager_->Destroy(have_context);
texture_manager_.reset();
}
if (program_manager_ != NULL) {
program_manager_->Destroy(have_context);
program_manager_.reset();
}
if (shader_manager_ != NULL) {
shader_manager_->Destroy(have_context);
shader_manager_.reset();
}
}
void ContextGroup::AddExtensionString(const std::string& str) {
extensions_ += (extensions_.empty() ? "" : " ") + str;
}
IdAllocator* ContextGroup::GetIdAllocator(unsigned namespace_id) {
IdAllocatorMap::iterator it = id_namespaces_.find(namespace_id);
if (it != id_namespaces_.end()) {
return it->second.get();
}
IdAllocator* id_allocator = new IdAllocator();
id_namespaces_[namespace_id] = linked_ptr<IdAllocator>(id_allocator);
return id_allocator;
}
} // namespace gles2
} // namespace gpu
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