220 lines
7.9 KiB
C++
220 lines
7.9 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 Gräßlin <mgraesslin@kde.org>
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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 "abstractplatformcontext.h"
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#include "integration.h"
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namespace KWin
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{
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namespace QPA
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{
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static 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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static EGLConfig configFromGLFormat(EGLDisplay dpy, const QSurfaceFormat &format)
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{
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#define SIZE( __buffer__ ) format.__buffer__##BufferSize() > 0 ? format.__buffer__##BufferSize() : 0
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// not setting samples as QtQuick doesn't need it
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const EGLint config_attribs[] = {
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EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
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EGL_RED_SIZE, SIZE(red),
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EGL_GREEN_SIZE, SIZE(green),
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EGL_BLUE_SIZE, SIZE(blue),
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EGL_ALPHA_SIZE, SIZE(alpha),
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EGL_DEPTH_SIZE, SIZE(depth),
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EGL_STENCIL_SIZE, SIZE(stencil),
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EGL_RENDERABLE_TYPE, isOpenGLES() ? EGL_OPENGL_ES2_BIT : EGL_OPENGL_BIT,
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EGL_NONE,
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};
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#undef SIZE
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EGLint count;
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EGLConfig configs[1024];
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if (eglChooseConfig(dpy, config_attribs, configs, 1, &count) == EGL_FALSE) {
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return 0;
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}
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if (count != 1) {
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return 0;
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}
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return configs[0];
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}
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static QSurfaceFormat formatFromConfig(EGLDisplay dpy, EGLConfig config)
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{
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QSurfaceFormat format;
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EGLint value = 0;
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#define HELPER(__egl__, __qt__) \
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eglGetConfigAttrib(dpy, config, EGL_##__egl__, &value); \
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format.set##__qt__(value); \
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value = 0;
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#define BUFFER_HELPER(__eglColor__, __color__) \
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HELPER(__eglColor__##_SIZE, __color__##BufferSize)
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BUFFER_HELPER(RED, Red)
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BUFFER_HELPER(GREEN, Green)
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BUFFER_HELPER(BLUE, Blue)
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BUFFER_HELPER(ALPHA, Alpha)
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BUFFER_HELPER(STENCIL, Stencil)
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BUFFER_HELPER(DEPTH, Depth)
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#undef BUFFER_HELPER
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HELPER(SAMPLES, Samples)
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#undef HELPER
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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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AbstractPlatformContext::AbstractPlatformContext(QOpenGLContext *context, Integration *integration, EGLDisplay display)
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: QPlatformOpenGLContext()
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, m_integration(integration)
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, m_eglDisplay(display)
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, m_config(configFromGLFormat(m_eglDisplay, context->format()))
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, m_format(formatFromConfig(m_eglDisplay, m_config))
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{
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}
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AbstractPlatformContext::~AbstractPlatformContext()
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{
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if (m_context != EGL_NO_CONTEXT) {
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eglDestroyContext(m_eglDisplay, m_context);
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}
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}
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void AbstractPlatformContext::doneCurrent()
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{
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eglMakeCurrent(m_eglDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
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}
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QSurfaceFormat AbstractPlatformContext::format() const
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{
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return m_format;
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}
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#if (QT_VERSION < QT_VERSION_CHECK(5, 7, 0))
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QFunctionPointer AbstractPlatformContext::getProcAddress(const QByteArray &procName)
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{
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return eglGetProcAddress(procName.constData());
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}
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#else
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QFunctionPointer AbstractPlatformContext::getProcAddress(const char *procName)
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{
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return eglGetProcAddress(procName);
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}
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#endif
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bool AbstractPlatformContext::isValid() const
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{
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return m_context != EGL_NO_CONTEXT;
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}
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bool AbstractPlatformContext::bindApi()
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{
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if (eglBindAPI(isOpenGLES() ? EGL_OPENGL_ES_API : EGL_OPENGL_API) == EGL_FALSE) {
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return false;
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}
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return true;
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}
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void AbstractPlatformContext::createContext(EGLContext shareContext)
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{
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const QByteArray eglExtensions = eglQueryString(eglDisplay(), EGL_EXTENSIONS);
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const QList<QByteArray> extensions = eglExtensions.split(' ');
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const bool haveRobustness = extensions.contains(QByteArrayLiteral("EGL_EXT_create_context_robustness"));
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const bool haveCreateContext = extensions.contains(QByteArrayLiteral("EGL_KHR_create_context"));
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EGLContext context = EGL_NO_CONTEXT;
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if (isOpenGLES()) {
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if (haveCreateContext && haveRobustness) {
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const EGLint context_attribs[] = {
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EGL_CONTEXT_CLIENT_VERSION, 2,
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EGL_CONTEXT_OPENGL_ROBUST_ACCESS_EXT, EGL_TRUE,
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EGL_CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY_EXT, EGL_LOSE_CONTEXT_ON_RESET_EXT,
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EGL_NONE
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};
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context = eglCreateContext(eglDisplay(), config(), shareContext, context_attribs);
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}
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if (context == EGL_NO_CONTEXT) {
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const EGLint context_attribs[] = {
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EGL_CONTEXT_CLIENT_VERSION, 2,
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EGL_NONE
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};
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context = eglCreateContext(eglDisplay(), config(), shareContext, context_attribs);
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}
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} else {
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// Try to create a 3.1 core context
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if (m_format.majorVersion() >= 3 && haveCreateContext) {
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if (haveRobustness) {
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const int attribs[] = {
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EGL_CONTEXT_MAJOR_VERSION_KHR, m_format.majorVersion(),
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EGL_CONTEXT_MINOR_VERSION_KHR, m_format.minorVersion(),
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EGL_CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY_KHR, EGL_LOSE_CONTEXT_ON_RESET_KHR,
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EGL_CONTEXT_FLAGS_KHR, EGL_CONTEXT_OPENGL_ROBUST_ACCESS_BIT_KHR | EGL_CONTEXT_OPENGL_FORWARD_COMPATIBLE_BIT_KHR,
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EGL_CONTEXT_OPENGL_PROFILE_MASK_KHR, m_format.profile() == QSurfaceFormat::CoreProfile ? EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT_KHR : EGL_CONTEXT_OPENGL_COMPATIBILITY_PROFILE_BIT_KHR,
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EGL_NONE
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};
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context = eglCreateContext(eglDisplay(), config(), shareContext, attribs);
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}
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if (context == EGL_NO_CONTEXT) {
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// try without robustness
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const EGLint attribs[] = {
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EGL_CONTEXT_MAJOR_VERSION_KHR, m_format.majorVersion(),
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EGL_CONTEXT_MINOR_VERSION_KHR, m_format.minorVersion(),
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EGL_CONTEXT_FLAGS_KHR, EGL_CONTEXT_OPENGL_FORWARD_COMPATIBLE_BIT_KHR,
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EGL_CONTEXT_OPENGL_PROFILE_MASK_KHR, m_format.profile() == QSurfaceFormat::CoreProfile ? EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT_KHR : EGL_CONTEXT_OPENGL_COMPATIBILITY_PROFILE_BIT_KHR,
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EGL_NONE
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};
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context = eglCreateContext(eglDisplay(), config(), shareContext, attribs);
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}
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}
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if (context == EGL_NO_CONTEXT && haveRobustness && haveCreateContext) {
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const int attribs[] = {
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EGL_CONTEXT_FLAGS_KHR, EGL_CONTEXT_OPENGL_ROBUST_ACCESS_BIT_KHR,
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EGL_CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY_KHR, EGL_LOSE_CONTEXT_ON_RESET_KHR,
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EGL_NONE
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};
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context = eglCreateContext(eglDisplay(), config(), shareContext, attribs);
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}
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if (context == EGL_NO_CONTEXT) {
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// and last but not least: try without robustness
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const EGLint attribs[] = {
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EGL_NONE
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};
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context = eglCreateContext(eglDisplay(), config(), shareContext, attribs);
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}
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}
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if (context == EGL_NO_CONTEXT) {
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return;
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}
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m_context = context;
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}
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}
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}
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