/usr/include/firefox-esr-52/ForceDiscreteGPUHelperCGL.h is in firefox-esr-dev 52.8.1esr-1~deb8u1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 | /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* 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/. */
#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_
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