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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 "ui/gl/gl_wgl_api_implementation.h"
#include "base/command_line.h"
#include "base/strings/string_split.h"
#include "base/strings/string_util.h"
#include "ui/gl/gl_implementation.h"
namespace gfx {
RealWGLApi* g_real_wgl;
void InitializeStaticGLBindingsWGL() {
g_driver_wgl.InitializeStaticBindings();
if (!g_real_wgl) {
g_real_wgl = new RealWGLApi();
}
g_real_wgl->Initialize(&g_driver_wgl);
g_current_wgl_context = g_real_wgl;
g_driver_wgl.InitializeExtensionBindings();
}
void InitializeDebugGLBindingsWGL() {
g_driver_wgl.InitializeDebugBindings();
}
void ClearGLBindingsWGL() {
if (g_real_wgl) {
delete g_real_wgl;
g_real_wgl = NULL;
}
g_current_wgl_context = NULL;
g_driver_wgl.ClearBindings();
}
WGLApi::WGLApi() {
}
WGLApi::~WGLApi() {
}
WGLApiBase::WGLApiBase()
: driver_(NULL) {
}
WGLApiBase::~WGLApiBase() {
}
void WGLApiBase::InitializeBase(DriverWGL* driver) {
driver_ = driver;
}
RealWGLApi::RealWGLApi() {
}
RealWGLApi::~RealWGLApi() {
}
void RealWGLApi::Initialize(DriverWGL* driver) {
InitializeWithCommandLine(driver, base::CommandLine::ForCurrentProcess());
}
void RealWGLApi::InitializeWithCommandLine(DriverWGL* driver,
base::CommandLine* command_line) {
DCHECK(command_line);
InitializeBase(driver);
const std::string disabled_extensions = command_line->GetSwitchValueASCII(
switches::kDisableGLExtensions);
disabled_exts_.clear();
filtered_ext_exts_ = "";
filtered_arb_exts_ = "";
if (!disabled_extensions.empty()) {
disabled_exts_ =
base::SplitString(disabled_extensions, ", ;",
base::KEEP_WHITESPACE,
base::SPLIT_WANT_NONEMPTY);
}
}
const char* RealWGLApi::wglGetExtensionsStringARBFn(HDC hDC) {
if (filtered_arb_exts_.size())
return filtered_arb_exts_.c_str();
if (!driver_->fn.wglGetExtensionsStringARBFn)
return NULL;
const char* str = WGLApiBase::wglGetExtensionsStringARBFn(hDC);
if (!str)
return NULL;
filtered_arb_exts_ = FilterGLExtensionList(str, disabled_exts_);
return filtered_arb_exts_.c_str();
}
const char* RealWGLApi::wglGetExtensionsStringEXTFn() {
if (filtered_ext_exts_.size())
return filtered_ext_exts_.c_str();
if (!driver_->fn.wglGetExtensionsStringEXTFn)
return NULL;
const char* str = WGLApiBase::wglGetExtensionsStringEXTFn();
if (!str)
return NULL;
filtered_ext_exts_ = FilterGLExtensionList(str, disabled_exts_);
return filtered_ext_exts_.c_str();
}
TraceWGLApi::~TraceWGLApi() {
}
bool GetGLWindowSystemBindingInfoWGL(GLWindowSystemBindingInfo* info) {
const char* extensions = wglGetExtensionsStringEXT();
*info = GLWindowSystemBindingInfo();
if (extensions)
info->extensions = extensions;
return true;
}
} // namespace gfx
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