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)
93 lines
2.5 KiB
C++
93 lines
2.5 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_fb_backend.h"
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#include "fb_backend.h"
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#include "composite.h"
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#include "cursor.h"
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#include "main.h"
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#include "platform.h"
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#include "renderloop.h"
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#include "screens.h"
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#include "session.h"
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#include "vsyncmonitor.h"
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// Qt
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#include <QPainter>
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namespace KWin
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{
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FramebufferQPainterBackend::FramebufferQPainterBackend(FramebufferBackend *backend)
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: QPainterBackend()
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, m_renderBuffer(backend->screenSize(), QImage::Format_RGB32)
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, m_backend(backend)
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{
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m_renderBuffer.fill(Qt::black);
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m_backend->map();
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m_backBuffer = QImage((uchar*)m_backend->mappedMemory(),
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m_backend->bytesPerLine() / (m_backend->bitsPerPixel() / 8),
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m_backend->bufferSize() / m_backend->bytesPerLine(),
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m_backend->bytesPerLine(), m_backend->imageFormat());
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m_backBuffer.fill(Qt::black);
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connect(kwinApp()->platform()->session(), &Session::activeChanged, this, [this](bool active) {
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if (active) {
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reactivate();
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} else {
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deactivate();
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}
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});
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}
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void FramebufferQPainterBackend::reactivate()
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{
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const QVector<AbstractOutput *> outputs = m_backend->outputs();
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for (AbstractOutput *output : outputs) {
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output->renderLoop()->uninhibit();
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}
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Compositor::self()->addRepaintFull();
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}
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void FramebufferQPainterBackend::deactivate()
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{
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const QVector<AbstractOutput *> outputs = m_backend->outputs();
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for (AbstractOutput *output : outputs) {
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output->renderLoop()->inhibit();
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}
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}
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FramebufferQPainterBackend::~FramebufferQPainterBackend() = default;
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QImage* FramebufferQPainterBackend::bufferForScreen(int screenId)
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{
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Q_UNUSED(screenId)
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return &m_renderBuffer;
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}
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QRegion FramebufferQPainterBackend::beginFrame(int screenId)
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{
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return screens()->geometry(screenId);
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}
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void FramebufferQPainterBackend::endFrame(int screenId, const QRegion &damage)
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{
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Q_UNUSED(screenId)
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Q_UNUSED(damage)
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if (!kwinApp()->platform()->session()->isActive()) {
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return;
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}
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FramebufferOutput *output = static_cast<FramebufferOutput *>(m_backend->findOutput(screenId));
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output->vsyncMonitor()->arm();
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QPainter p(&m_backBuffer);
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p.drawImage(QPoint(0, 0), m_backend->isBGR() ? m_renderBuffer.rgbSwapped() : m_renderBuffer);
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}
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}
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