120 lines
3 KiB
C++
120 lines
3 KiB
C++
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/********************************************************************
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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) 2006 Lubos Lunak <l.lunak@kde.org>
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Copyright (C) 2009, 2010, 2011 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 "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()
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{
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return NULL;
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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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foreach (const QRect &r, region.rects()) {
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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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}
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