116 lines
3.9 KiB
C++
116 lines
3.9 KiB
C++
/********************************************************************
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KWin - the KDE window manager
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This file is part of the KDE project.
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Copyright (C) 2015 Martin Flöser <mgraesslin@kde.org>
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Copyright (C) 2019 Vlad Zahorodnii <vladzzag@gmail.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*********************************************************************/
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#include "eglhelpers.h"
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#include <logging.h>
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#include <QOpenGLContext>
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namespace KWin
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{
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namespace QPA
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{
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bool isOpenGLES()
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{
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if (qstrcmp(qgetenv("KWIN_COMPOSE"), "O2ES") == 0) {
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return true;
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}
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return QOpenGLContext::openGLModuleType() == QOpenGLContext::LibGLES;
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}
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EGLConfig configFromFormat(EGLDisplay display, const QSurfaceFormat &surfaceFormat, EGLint surfaceType)
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{
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// qMax as these values are initialized to -1 by default.
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const EGLint redSize = qMax(surfaceFormat.redBufferSize(), 0);
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const EGLint greenSize = qMax(surfaceFormat.greenBufferSize(), 0);
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const EGLint blueSize = qMax(surfaceFormat.blueBufferSize(), 0);
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const EGLint alphaSize = qMax(surfaceFormat.alphaBufferSize(), 0);
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const EGLint depthSize = qMax(surfaceFormat.depthBufferSize(), 0);
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const EGLint stencilSize = qMax(surfaceFormat.stencilBufferSize(), 0);
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const EGLint renderableType = isOpenGLES() ? EGL_OPENGL_ES2_BIT : EGL_OPENGL_BIT;
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// Not setting samples as QtQuick doesn't need it.
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const QVector<EGLint> attributes {
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EGL_SURFACE_TYPE, surfaceType,
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EGL_RED_SIZE, redSize,
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EGL_GREEN_SIZE, greenSize,
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EGL_BLUE_SIZE, blueSize,
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EGL_ALPHA_SIZE, alphaSize,
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EGL_DEPTH_SIZE, depthSize,
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EGL_STENCIL_SIZE, stencilSize,
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EGL_RENDERABLE_TYPE, renderableType,
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EGL_NONE
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};
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EGLint configCount;
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EGLConfig configs[1024];
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if (!eglChooseConfig(display, attributes.data(), configs, 1, &configCount)) {
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// FIXME: Don't bail out yet, we should try to find the most suitable config.
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qCWarning(KWIN_QPA, "eglChooseConfig failed: %x", eglGetError());
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return EGL_NO_CONFIG_KHR;
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}
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if (configCount != 1) {
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qCWarning(KWIN_QPA) << "eglChooseConfig did not return any configs";
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return EGL_NO_CONFIG_KHR;
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}
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return configs[0];
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}
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QSurfaceFormat formatFromConfig(EGLDisplay display, EGLConfig config)
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{
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int redSize = 0;
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int blueSize = 0;
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int greenSize = 0;
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int alphaSize = 0;
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int stencilSize = 0;
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int depthSize = 0;
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int sampleCount = 0;
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eglGetConfigAttrib(display, config, EGL_RED_SIZE, &redSize);
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eglGetConfigAttrib(display, config, EGL_GREEN_SIZE, &greenSize);
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eglGetConfigAttrib(display, config, EGL_BLUE_SIZE, &blueSize);
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eglGetConfigAttrib(display, config, EGL_ALPHA_SIZE, &alphaSize);
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eglGetConfigAttrib(display, config, EGL_STENCIL_SIZE, &stencilSize);
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eglGetConfigAttrib(display, config, EGL_DEPTH_SIZE, &depthSize);
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eglGetConfigAttrib(display, config, EGL_SAMPLES, &sampleCount);
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QSurfaceFormat format;
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format.setRedBufferSize(redSize);
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format.setGreenBufferSize(greenSize);
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format.setBlueBufferSize(blueSize);
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format.setAlphaBufferSize(alphaSize);
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format.setStencilBufferSize(stencilSize);
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format.setDepthBufferSize(depthSize);
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format.setSamples(sampleCount);
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format.setRenderableType(isOpenGLES() ? QSurfaceFormat::OpenGLES : QSurfaceFormat::OpenGL);
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format.setStereo(false);
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return format;
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}
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} // namespace QPA
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} // namespace KWin
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