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// Copyright (c) 2009 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 "app/app_switches.h"
#include "app/gfx/gl/gl_context.h"
#include "app/gfx/gl/gl_bindings.h"
#include "app/gfx/gl/gl_implementation.h"
#include "base/command_line.h"
#include "base/logging.h"
namespace gfx {
unsigned int GLContext::GetBackingFrameBufferObject() {
return 0;
}
std::string GLContext::GetExtensions() {
DCHECK(IsCurrent());
const char* ext = reinterpret_cast<const char*>(glGetString(GL_EXTENSIONS));
return std::string(ext ? ext : "");
}
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;
}
bool GLContext::InitializeCommon() {
if (!MakeCurrent()) {
LOG(ERROR) << "MakeCurrent failed.";
return false;
}
if (!IsOffscreen()) {
if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kDisableGpuVsync))
SetSwapInterval(0);
else
SetSwapInterval(1);
}
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
if (glGetError() != GL_NO_ERROR) {
LOG(ERROR) << "glClear failed.";
return false;
}
return true;
}
} // namespace gfx
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