1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/gl/ForceDiscreteGPUHelperCGL.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,36 @@
1.4 +/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
1.5 + * This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#ifndef ForceDiscreteGPUHelperCGL_h_
1.10 +#define ForceDiscreteGPUHelperCGL_h_
1.11 +
1.12 +#include <OpenGL/OpenGL.h>
1.13 +
1.14 +/** This RAII helper guarantees that we're on the discrete GPU during its lifetime.
1.15 + *
1.16 + * As long as any ForceDiscreteGPUHelperCGL object is alive, we're on the discrete GPU.
1.17 + */
1.18 +class ForceDiscreteGPUHelperCGL
1.19 +{
1.20 + CGLPixelFormatObj mPixelFormatObj;
1.21 +
1.22 +public:
1.23 + ForceDiscreteGPUHelperCGL()
1.24 + {
1.25 + // the code in this function is taken from Chromium, src/ui/gfx/gl/gl_context_cgl.cc, r122013
1.26 + // BSD-style license, (c) The Chromium Authors
1.27 + CGLPixelFormatAttribute attribs[1];
1.28 + attribs[0] = static_cast<CGLPixelFormatAttribute>(0);
1.29 + GLint num_pixel_formats = 0;
1.30 + CGLChoosePixelFormat(attribs, &mPixelFormatObj, &num_pixel_formats);
1.31 + }
1.32 +
1.33 + ~ForceDiscreteGPUHelperCGL()
1.34 + {
1.35 + CGLReleasePixelFormat(mPixelFormatObj);
1.36 + }
1.37 +};
1.38 +
1.39 +#endif // ForceDiscreteGPUHelperCGL_h_
