58 lines
1.4 KiB
C++
58 lines
1.4 KiB
C++
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/*
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SPDX-FileCopyrightText: 2006 Lubos Lunak <l.lunak@kde.org>
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SPDX-FileCopyrightText: 2012 Martin Gräßlin <mgraesslin@kde.org>
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SPDX-FileCopyrightText: 2021 Vlad Zahorodnii <vlad.zahorodnii@kde.org>
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SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "glxconvenience.h"
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#include <deque>
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namespace KWin
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{
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GLXFBConfig chooseGlxFbConfig(Display *display, const int attributes[])
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{
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int configCount = 0;
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GLXFBConfig *configs = glXChooseFBConfig(display, DefaultScreen(display),
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attributes, &configCount);
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struct FBConfig {
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GLXFBConfig config;
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int depth;
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int stencil;
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};
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std::deque<FBConfig> candidates;
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for (int i = 0; i < configCount; i++) {
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int depth, stencil;
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glXGetFBConfigAttrib(display, configs[i], GLX_DEPTH_SIZE, &depth);
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glXGetFBConfigAttrib(display, configs[i], GLX_STENCIL_SIZE, &stencil);
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candidates.emplace_back(FBConfig{configs[i], depth, stencil});
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}
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if (configCount > 0) {
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XFree(configs);
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}
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std::stable_sort(candidates.begin(), candidates.end(), [](const FBConfig &left, const FBConfig &right) {
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if (left.depth < right.depth) {
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return true;
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}
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if (left.stencil < right.stencil) {
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return true;
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}
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return false;
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});
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return candidates.empty() ? nullptr : candidates.front().config;
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}
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} // namespace KWin
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