1fb9f6f13a
The main advantage of SPDX license identifiers over the traditional license headers is that it's more difficult to overlook inappropriate licenses for kwin, for example GPL 3. We also don't have to copy a lot of boilerplate text. In order to create this change, I ran licensedigger -r -c from the toplevel source directory.
114 lines
2.6 KiB
C++
114 lines
2.6 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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SPDX-FileCopyrightText: 2006 Lubos Lunak <l.lunak@kde.org>
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SPDX-FileCopyrightText: 2009, 2010, 2011 Martin Gräßlin <mgraesslin@kde.org>
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SPDX-License-Identifier: GPL-2.0-or-later
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*********************************************************************/
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#include "backend.h"
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#include <kwineffects.h>
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#include <logging.h>
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#include "screens.h"
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#include <epoxy/gl.h>
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namespace KWin
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{
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OpenGLBackend::OpenGLBackend()
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: m_syncsToVBlank(false)
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, m_blocksForRetrace(false)
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, m_directRendering(false)
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, m_haveBufferAge(false)
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, m_failed(false)
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{
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}
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OpenGLBackend::~OpenGLBackend()
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{
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}
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void OpenGLBackend::setFailed(const QString &reason)
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{
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qCWarning(KWIN_OPENGL) << "Creating the OpenGL rendering failed: " << reason;
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m_failed = true;
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}
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void OpenGLBackend::idle()
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{
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if (hasPendingFlush()) {
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effects->makeOpenGLContextCurrent();
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present();
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}
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}
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void OpenGLBackend::addToDamageHistory(const QRegion ®ion)
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{
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if (m_damageHistory.count() > 10)
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m_damageHistory.removeLast();
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m_damageHistory.prepend(region);
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}
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QRegion OpenGLBackend::accumulatedDamageHistory(int bufferAge) const
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{
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QRegion region;
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// Note: An age of zero means the buffer contents are undefined
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if (bufferAge > 0 && bufferAge <= m_damageHistory.count()) {
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for (int i = 0; i < bufferAge - 1; i++)
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region |= m_damageHistory[i];
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} else {
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const QSize &s = screens()->size();
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region = QRegion(0, 0, s.width(), s.height());
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}
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return region;
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}
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OverlayWindow* OpenGLBackend::overlayWindow() const
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{
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return nullptr;
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}
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QRegion OpenGLBackend::prepareRenderingForScreen(int screenId)
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{
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// fallback to repaint complete screen
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return screens()->geometry(screenId);
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}
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void OpenGLBackend::endRenderingFrameForScreen(int screenId, const QRegion &damage, const QRegion &damagedRegion)
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{
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Q_UNUSED(screenId)
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Q_UNUSED(damage)
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Q_UNUSED(damagedRegion)
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}
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bool OpenGLBackend::perScreenRendering() const
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{
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return false;
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}
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void OpenGLBackend::copyPixels(const QRegion ®ion)
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{
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const int height = screens()->size().height();
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for (const QRect &r : region) {
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const int x0 = r.x();
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const int y0 = height - r.y() - r.height();
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const int x1 = r.x() + r.width();
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const int y1 = height - r.y();
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glBlitFramebuffer(x0, y0, x1, y1, x0, y0, x1, y1, GL_COLOR_BUFFER_BIT, GL_NEAREST);
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}
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}
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QSharedPointer<KWin::GLTexture> OpenGLBackend::textureForOutput(AbstractOutput* output) const
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{
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Q_UNUSED(output)
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return {};
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}
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}
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