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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_surface_cgl.h"
#include <OpenGL/CGLRenderers.h>
#include "base/basictypes.h"
#include "base/logging.h"
#include "base/mac/mac_util.h"
#include "ui/gl/gl_bindings.h"
#include "ui/gl/gl_context.h"
#include "ui/gl/gl_implementation.h"
#include "ui/gl/gpu_switching_manager.h"
namespace gfx {
namespace {
CGLPixelFormatObj g_pixel_format;
}
GLSurfaceCGL::GLSurfaceCGL() {}
bool GLSurfaceCGL::InitializeOneOff() {
static bool initialized = false;
if (initialized)
return true;
// This is called from the sandbox warmup code on Mac OS X.
// GPU-related stuff is very slow without this, probably because
// the sandbox prevents loading graphics drivers or some such.
std::vector<CGLPixelFormatAttribute> attribs;
if (ui::GpuSwitchingManager::GetInstance()->SupportsDualGpus()) {
// Avoid switching to the discrete GPU just for this pixel
// format selection.
attribs.push_back(kCGLPFAAllowOfflineRenderers);
}
if (GetGLImplementation() == kGLImplementationAppleGL) {
attribs.push_back(kCGLPFARendererID);
attribs.push_back(static_cast<CGLPixelFormatAttribute>(
kCGLRendererGenericFloatID));
}
attribs.push_back(static_cast<CGLPixelFormatAttribute>(0));
CGLPixelFormatObj format;
GLint num_pixel_formats;
if (CGLChoosePixelFormat(&attribs.front(),
&format,
&num_pixel_formats) != kCGLNoError) {
LOG(ERROR) << "Error choosing pixel format.";
return false;
}
if (!format) {
LOG(ERROR) << "format == 0.";
return false;
}
CGLReleasePixelFormat(format);
DCHECK_NE(num_pixel_formats, 0);
initialized = true;
return true;
}
void* GLSurfaceCGL::GetPixelFormat() {
return g_pixel_format;
}
GLSurfaceCGL::~GLSurfaceCGL() {}
NoOpGLSurfaceCGL::NoOpGLSurfaceCGL(const gfx::Size& size)
: size_(size) {
}
bool NoOpGLSurfaceCGL::Initialize() {
return true;
}
void NoOpGLSurfaceCGL::Destroy() {
}
bool NoOpGLSurfaceCGL::IsOffscreen() {
return true;
}
bool NoOpGLSurfaceCGL::SwapBuffers() {
NOTREACHED() << "Cannot call SwapBuffers on a NoOpGLSurfaceCGL.";
return false;
}
gfx::Size NoOpGLSurfaceCGL::GetSize() {
return size_;
}
void* NoOpGLSurfaceCGL::GetHandle() {
return NULL;
}
void* NoOpGLSurfaceCGL::GetDisplay() {
return NULL;
}
NoOpGLSurfaceCGL::~NoOpGLSurfaceCGL() {
Destroy();
}
} // namespace gfx
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