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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
commit26a029d407be480d791972afb5975cf62c9360a6 (patch)
treef435a8308119effd964b339f76abb83a57c29483 /gfx/gl/ForceDiscreteGPUHelperCGL.h
parentInitial commit. (diff)
downloadfirefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz
firefox-26a029d407be480d791972afb5975cf62c9360a6.zip
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'gfx/gl/ForceDiscreteGPUHelperCGL.h')
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+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * 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() : mPixelFormatObj(nullptr) {
+ // 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_