Differential D22150 Diff 60827 plugins/qpa/eglhelpers.cpp

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plugins/qpa/eglhelpers.cpp

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		1		/********************************************************************
		2		KWin - the KDE window manager
		3		This file is part of the KDE project.
		4
		5		Copyright (C) 2015 Martin Flöser <mgraesslin@kde.org>
		6		Copyright (C) 2019 Vlad Zagorodniy <vladzzag@gmail.com>
		7
		8		This program is free software; you can redistribute it and/or modify
		9		it under the terms of the GNU General Public License as published by
		10		the Free Software Foundation; either version 2 of the License, or
		11		(at your option) any later version.
		12
		13		This program is distributed in the hope that it will be useful,
		14		but WITHOUT ANY WARRANTY; without even the implied warranty of
		15		MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
		16		GNU General Public License for more details.
		17
		18		You should have received a copy of the GNU General Public License
		19		along with this program. If not, see <http://www.gnu.org/licenses/>.
		20		*********************************************************************/
		21
		22		#include "eglhelpers.h"
		23
		24		#include <logging.h>
		25
		26		#include <QOpenGLContext>
		27
		28		namespace KWin
		29		{
		30		namespace QPA
		31		{
		32
		33		bool isOpenGLES()
		34		{
		35		if (qstrcmp(qgetenv("KWIN_COMPOSE"), "O2ES") == 0) {
		36		return true;
		37		}
		38
		39		return QOpenGLContext::openGLModuleType() == QOpenGLContext::LibGLES;
		40		}
		41
		42		EGLConfig configFromFormat(EGLDisplay display, const QSurfaceFormat &surfaceFormat, EGLint surfaceType)
		43		{
		44		// qMax as these values are initialized to -1 by default.
		45		const EGLint redSize = qMax(surfaceFormat.redBufferSize(), 0);
		46		const EGLint greenSize = qMax(surfaceFormat.greenBufferSize(), 0);
		47		const EGLint blueSize = qMax(surfaceFormat.blueBufferSize(), 0);
		48		const EGLint alphaSize = qMax(surfaceFormat.alphaBufferSize(), 0);
		49		const EGLint depthSize = qMax(surfaceFormat.depthBufferSize(), 0);
		50		const EGLint stencilSize = qMax(surfaceFormat.stencilBufferSize(), 0);
		51
		52		const EGLint renderableType = isOpenGLES() ? EGL_OPENGL_ES2_BIT : EGL_OPENGL_BIT;
		53
		54		// Not setting samples as QtQuick doesn't need it.
		55		const QVector<EGLint> attributes {
		56		EGL_SURFACE_TYPE, surfaceType,
		57		EGL_RED_SIZE, redSize,
		58		EGL_GREEN_SIZE, greenSize,
		59		EGL_BLUE_SIZE, blueSize,
		60		EGL_ALPHA_SIZE, alphaSize,
		61		EGL_DEPTH_SIZE, depthSize,
		62		EGL_STENCIL_SIZE, stencilSize,
		63		EGL_RENDERABLE_TYPE, renderableType,
		64		EGL_NONE
		65		};
		66
		67		EGLint configCount;
		68		EGLConfig configs[1024];
		69		if (!eglChooseConfig(display, attributes.data(), configs, 1, &configCount)) {
		70		// FIXME: Don't bail out yet, we should try to find the most suitable config.
		71		qCWarning(KWIN_QPA, "eglChooseConfig failed: %x", eglGetError());
		72		return EGL_NO_CONFIG_KHR;
		73		}
		74
		75		if (configCount != 1) {
		76		qCWarning(KWIN_QPA) << "eglChooseConfig did not return any configs";
		77		return EGL_NO_CONFIG_KHR;
		78		}
		79
		80		return configs[0];
		81		}
		82
		83		QSurfaceFormat formatFromConfig(EGLDisplay display, EGLConfig config)
		84		{
		85		int redSize = 0;
		86		int blueSize = 0;
		87		int greenSize = 0;
		88		int alphaSize = 0;
		89		int stencilSize = 0;
		90		int depthSize = 0;
		91		int sampleCount = 0;
		92
		93		eglGetConfigAttrib(display, config, EGL_RED_SIZE, &redSize);
		94		eglGetConfigAttrib(display, config, EGL_GREEN_SIZE, &greenSize);
		95		eglGetConfigAttrib(display, config, EGL_BLUE_SIZE, &blueSize);
		96		eglGetConfigAttrib(display, config, EGL_ALPHA_SIZE, &alphaSize);
		97		eglGetConfigAttrib(display, config, EGL_STENCIL_SIZE, &stencilSize);
		98		eglGetConfigAttrib(display, config, EGL_DEPTH_SIZE, &depthSize);
		99		eglGetConfigAttrib(display, config, EGL_SAMPLES, &sampleCount);
		100
		101		QSurfaceFormat format;
		102		format.setRedBufferSize(redSize);
		103		format.setGreenBufferSize(greenSize);
		104		format.setBlueBufferSize(blueSize);
		105		format.setAlphaBufferSize(alphaSize);
		106		format.setStencilBufferSize(stencilSize);
		107		format.setDepthBufferSize(depthSize);
		108		format.setSamples(sampleCount);
		109		format.setRenderableType(isOpenGLES() ? QSurfaceFormat::OpenGLES : QSurfaceFormat::OpenGL);
		110		format.setStereo(false);
		111
		112		return format;
		113		}
		114
		115		} // namespace QPA
		116		} // namespace KWin