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// Copyright (c) 2012 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 <string>
#include "base/command_line.h"
#include "base/lazy_instance.h"
#include "base/logging.h"
#include "base/threading/thread_local.h"
#include "ui/gl/gl_bindings.h"
#include "ui/gl/gl_context.h"
#include "ui/gl/gl_gl_api_implementation.h"
#include "ui/gl/gl_implementation.h"
#include "ui/gl/gl_surface.h"
#include "ui/gl/gl_switches.h"
#include "ui/gl/gl_version_info.h"
namespace gfx {
namespace {
base::LazyInstance<base::ThreadLocalPointer<GLContext> >::Leaky
current_context_ = LAZY_INSTANCE_INITIALIZER;
base::LazyInstance<base::ThreadLocalPointer<GLContext> >::Leaky
current_real_context_ = LAZY_INSTANCE_INITIALIZER;
} // namespace
GLContext::GLContext(GLShareGroup* share_group) : share_group_(share_group) {
if (!share_group_.get())
share_group_ = new GLShareGroup;
share_group_->AddContext(this);
}
GLContext::~GLContext() {
share_group_->RemoveContext(this);
if (GetCurrent() == this) {
SetCurrent(NULL);
}
}
bool GLContext::GetTotalGpuMemory(size_t* bytes) {
DCHECK(bytes);
*bytes = 0;
return false;
}
void GLContext::SetSafeToForceGpuSwitch() {
}
void GLContext::SetUnbindFboOnMakeCurrent() {
NOTIMPLEMENTED();
}
std::string GLContext::GetExtensions() {
DCHECK(IsCurrent(NULL));
const char* ext = reinterpret_cast<const char*>(glGetString(GL_EXTENSIONS));
return std::string(ext ? ext : "");
}
std::string GLContext::GetGLVersion() {
DCHECK(IsCurrent(NULL));
const char *version =
reinterpret_cast<const char*>(glGetString(GL_VERSION));
return std::string(version ? version : "");
}
std::string GLContext::GetGLRenderer() {
DCHECK(IsCurrent(NULL));
const char *renderer =
reinterpret_cast<const char*>(glGetString(GL_RENDERER));
return std::string(renderer ? renderer : "");
}
bool GLContext::HasExtension(const char* name) {
std::string extensions = GetExtensions();
extensions += " ";
std::string delimited_name(name);
delimited_name += " ";
return extensions.find(delimited_name) != std::string::npos;
}
const GLVersionInfo* GLContext::GetVersionInfo() {
if(!version_info_) {
std::string version = GetGLVersion();
std::string renderer = GetGLRenderer();
version_info_ = scoped_ptr<GLVersionInfo>(
new GLVersionInfo(version.c_str(), renderer.c_str()));
}
return version_info_.get();
}
GLShareGroup* GLContext::share_group() {
return share_group_.get();
}
bool GLContext::LosesAllContextsOnContextLost() {
switch (GetGLImplementation()) {
case kGLImplementationDesktopGL:
return false;
case kGLImplementationEGLGLES2:
return true;
case kGLImplementationOSMesaGL:
case kGLImplementationAppleGL:
return false;
case kGLImplementationMockGL:
return false;
default:
NOTREACHED();
return true;
}
}
GLContext* GLContext::GetCurrent() {
return current_context_.Pointer()->Get();
}
GLContext* GLContext::GetRealCurrent() {
return current_real_context_.Pointer()->Get();
}
void GLContext::SetCurrent(GLSurface* surface) {
current_context_.Pointer()->Set(surface ? this : NULL);
GLSurface::SetCurrent(surface);
}
GLStateRestorer* GLContext::GetGLStateRestorer() {
return state_restorer_.get();
}
void GLContext::SetGLStateRestorer(GLStateRestorer* state_restorer) {
state_restorer_ = make_scoped_ptr(state_restorer);
}
bool GLContext::WasAllocatedUsingRobustnessExtension() {
return false;
}
bool GLContext::InitializeDynamicBindings() {
DCHECK(IsCurrent(NULL));
static bool initialized = false;
if (initialized)
return initialized;
initialized = InitializeDynamicGLBindings(GetGLImplementation(), this);
if (!initialized)
LOG(ERROR) << "Could not initialize dynamic bindings.";
return initialized;
}
void GLContext::SetupForVirtualization() {
if (!virtual_gl_api_) {
virtual_gl_api_.reset(new VirtualGLApi());
virtual_gl_api_->Initialize(&g_driver_gl, this);
}
}
bool GLContext::MakeVirtuallyCurrent(
GLContext* virtual_context, GLSurface* surface) {
DCHECK(virtual_gl_api_);
return virtual_gl_api_->MakeCurrent(virtual_context, surface);
}
void GLContext::OnReleaseVirtuallyCurrent(GLContext* virtual_context) {
if (virtual_gl_api_)
virtual_gl_api_->OnReleaseVirtuallyCurrent(virtual_context);
}
void GLContext::SetRealGLApi() {
SetGLToRealGLApi();
}
GLContextReal::GLContextReal(GLShareGroup* share_group)
: GLContext(share_group) {}
GLContextReal::~GLContextReal() {}
void GLContextReal::SetCurrent(GLSurface* surface) {
GLContext::SetCurrent(surface);
current_real_context_.Pointer()->Set(surface ? this : NULL);
}
} // namespace gfx
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