2fe102768a
A better alternative is to return the damage region in the beginFrame() function. This way, the render backend can force full screen repaints or indicate what parts of the buffer needs to be repainted (for buffer age)
62 lines
1.6 KiB
C++
62 lines
1.6 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: 2015 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 "scene_qpainter_virtual_backend.h"
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#include "cursor.h"
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#include "screens.h"
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#include "softwarevsyncmonitor.h"
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#include "virtual_backend.h"
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#include "virtual_output.h"
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#include <QPainter>
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namespace KWin
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{
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VirtualQPainterBackend::VirtualQPainterBackend(VirtualBackend *backend)
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: QPainterBackend()
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, m_backend(backend)
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{
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connect(screens(), &Screens::changed, this, &VirtualQPainterBackend::createOutputs);
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createOutputs();
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}
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VirtualQPainterBackend::~VirtualQPainterBackend() = default;
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QImage *VirtualQPainterBackend::bufferForScreen(int screen)
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{
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return &m_backBuffers[screen];
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}
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QRegion VirtualQPainterBackend::beginFrame(int screenId)
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{
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return screens()->geometry(screenId);
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}
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void VirtualQPainterBackend::createOutputs()
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{
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m_backBuffers.clear();
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for (int i = 0; i < screens()->count(); ++i) {
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QImage buffer(screens()->size(i) * screens()->scale(i), QImage::Format_RGB32);
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buffer.fill(Qt::black);
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m_backBuffers << buffer;
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}
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}
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void VirtualQPainterBackend::endFrame(int screenId, const QRegion &damage)
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{
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Q_UNUSED(damage)
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VirtualOutput *output = static_cast<VirtualOutput *>(m_backend->findOutput(screenId));
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output->vsyncMonitor()->arm();
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if (m_backend->saveFrames()) {
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m_backBuffers[screenId].save(QStringLiteral("%1/screen%2-%3.png").arg(m_backend->screenshotDirPath(), QString::number(screenId), QString::number(m_frameCounter++)));
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}
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}
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}
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