File indexing completed on 2024-11-10 04:56:56

 /*
     KWin - the KDE window manager
     This file is part of the KDE project.
 
     SPDX-FileCopyrightText: 2006 Lubos Lunak <l.lunak@kde.org>
     SPDX-FileCopyrightText: 2009, 2010, 2011 Martin Gräßlin <mgraesslin@kde.org>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 #include "platformsupport/scenes/opengl/openglbackend.h"
 #include "opengl/glutils_funcs.h"
 
 #include "utils/common.h"
 
 #include <QElapsedTimer>
 
 #include <unistd.h>
 
 namespace KWin
 {
 
 OpenGLBackend::OpenGLBackend()
     : m_haveBufferAge(false)
     , m_failed(false)
 {
 }
 
 OpenGLBackend::~OpenGLBackend()
 {
 }
 
 CompositingType OpenGLBackend::compositingType() const
 {
     return OpenGLCompositing;
 }
 
 void OpenGLBackend::setFailed(const QString &reason)
 {
     qCWarning(KWIN_OPENGL) << "Creating the OpenGL rendering failed: " << reason;
     m_failed = true;
 }
 
 void OpenGLBackend::copyPixels(const QRegion &region, const QSize &screenSize)
 {
     const int height = screenSize.height();
     for (const QRect &r : region) {
         const int x0 = r.x();
         const int y0 = height - r.y() - r.height();
         const int x1 = r.x() + r.width();
         const int y1 = height - r.y();
 
         glBlitFramebuffer(x0, y0, x1, y1, x0, y0, x1, y1, GL_COLOR_BUFFER_BIT, GL_NEAREST);
     }
 }
 
 std::pair<std::shared_ptr<KWin::GLTexture>, ColorDescription> OpenGLBackend::textureForOutput(Output *output) const
 {
     return {nullptr, ColorDescription::sRGB};
 }
 
 bool OpenGLBackend::checkGraphicsReset()
 {
     const GLenum status = KWin::glGetGraphicsResetStatus();
     if (Q_LIKELY(status == GL_NO_ERROR)) {
         return false;
     }
 
     switch (status) {
     case GL_GUILTY_CONTEXT_RESET:
         qCWarning(KWIN_OPENGL) << "A graphics reset attributable to the current GL context occurred.";
         break;
     case GL_INNOCENT_CONTEXT_RESET:
         qCWarning(KWIN_OPENGL) << "A graphics reset not attributable to the current GL context occurred.";
         break;
     case GL_UNKNOWN_CONTEXT_RESET:
         qCWarning(KWIN_OPENGL) << "A graphics reset of an unknown cause occurred.";
         break;
     default:
         break;
     }
 
     QElapsedTimer timer;
     timer.start();
 
     // Wait until the reset is completed or max one second
     while (timer.elapsed() < 10000 && KWin::glGetGraphicsResetStatus() != GL_NO_ERROR) {
         usleep(50);
     }
     if (timer.elapsed() >= 10000) {
         qCWarning(KWIN_OPENGL) << "Waiting for glGetGraphicsResetStatus to return GL_NO_ERROR timed out!";
     }
 
     return true;
 }
 
 }
 
 #include "moc_openglbackend.cpp"