/* -*- 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_