eeeac04974
Summary: Notify the driver about the parts of the screen that will be repainted. In some cases this can be benefitial. This is especially useful on lima and panfrost devices (e.g. pinephone, pinebook, pinebook pro). Test Plan: Tested on a pinebook pro with a late mesa version. Basically I implemented it, then it didn't work and I fixed it. Maybe next step we want to look into our damage algorithm.
119 lines
2.6 KiB
C++
119 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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void OpenGLBackend::aboutToStartPainting(const QRegion &damage)
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{
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Q_UNUSED(damage)
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}
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}
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