2012-02-29 12:49:55 -08:00
|
|
|
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
|
2012-05-21 04:12:37 -07:00
|
|
|
* This Source Code Form is subject to the terms of the Mozilla Public
|
|
|
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
|
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
2012-02-29 12:49:55 -08:00
|
|
|
|
|
|
|
|
#ifndef ForceDiscreteGPUHelperCGL_h_
|
|
|
|
|
#define ForceDiscreteGPUHelperCGL_h_
|
|
|
|
|
|
|
|
|
|
#include <OpenGL/OpenGL.h>
|
|
|
|
|
|
|
|
|
|
/** This RAII helper guarantees that we're on the discrete GPU during its lifetime.
|
|
|
|
|
*
|
|
|
|
|
* As long as any ForceDiscreteGPUHelperCGL object is alive, we're on the discrete GPU.
|
|
|
|
|
*/
|
|
|
|
|
class ForceDiscreteGPUHelperCGL
|
|
|
|
|
{
|
|
|
|
|
CGLPixelFormatObj mPixelFormatObj;
|
|
|
|
|
|
|
|
|
|
public:
|
|
|
|
|
ForceDiscreteGPUHelperCGL()
|
|
|
|
|
{
|
|
|
|
|
// the code in this function is taken from Chromium, src/ui/gfx/gl/gl_context_cgl.cc, r122013
|
|
|
|
|
// BSD-style license, (c) The Chromium Authors
|
|
|
|
|
CGLPixelFormatAttribute attribs[1];
|
|
|
|
|
attribs[0] = static_cast<CGLPixelFormatAttribute>(0);
|
|
|
|
|
GLint num_pixel_formats = 0;
|
|
|
|
|
CGLChoosePixelFormat(attribs, &mPixelFormatObj, &num_pixel_formats);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
~ForceDiscreteGPUHelperCGL()
|
|
|
|
|
{
|
|
|
|
|
CGLReleasePixelFormat(mPixelFormatObj);
|
|
|
|
|
}
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
#endif // ForceDiscreteGPUHelperCGL_h_
|
