135 lines
3.8 KiB
C++
135 lines
3.8 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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Copyright (C) 2013, 2015 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 "scene_qpainter_wayland_backend.h"
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#include "composite.h"
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#include "logging.h"
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#include "wayland_backend.h"
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#include <KWayland/Client/buffer.h>
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#include <KWayland/Client/shm_pool.h>
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#include <KWayland/Client/surface.h>
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namespace KWin
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{
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WaylandQPainterBackend::WaylandQPainterBackend(Wayland::WaylandBackend *b)
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: QPainterBackend()
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, m_backend(b)
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, m_needsFullRepaint(true)
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, m_backBuffer(QImage(QSize(), QImage::Format_RGB32))
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, m_buffer()
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{
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connect(b->shmPool(), SIGNAL(poolResized()), SLOT(remapBuffer()));
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connect(b, &Wayland::WaylandBackend::shellSurfaceSizeChanged,
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this, &WaylandQPainterBackend::screenGeometryChanged);
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connect(b->surface(), &KWayland::Client::Surface::frameRendered,
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Compositor::self(), &Compositor::bufferSwapComplete);
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}
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WaylandQPainterBackend::~WaylandQPainterBackend()
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{
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if (m_buffer) {
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m_buffer.toStrongRef()->setUsed(false);
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}
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}
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bool WaylandQPainterBackend::usesOverlayWindow() const
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{
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return false;
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}
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void WaylandQPainterBackend::present(int mask, const QRegion &damage)
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{
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Q_UNUSED(mask)
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if (m_backBuffer.isNull()) {
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return;
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}
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Compositor::self()->aboutToSwapBuffers();
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m_needsFullRepaint = false;
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auto s = m_backend->surface();
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s->attachBuffer(m_buffer);
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s->damage(damage);
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s->commit();
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}
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void WaylandQPainterBackend::screenGeometryChanged(const QSize &size)
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{
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Q_UNUSED(size)
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if (!m_buffer) {
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return;
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}
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m_buffer.toStrongRef()->setUsed(false);
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m_buffer.clear();
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}
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QImage *WaylandQPainterBackend::buffer()
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{
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return &m_backBuffer;
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}
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void WaylandQPainterBackend::prepareRenderingFrame()
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{
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if (m_buffer) {
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auto b = m_buffer.toStrongRef();
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if (b->isReleased()) {
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// we can re-use this buffer
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b->setReleased(false);
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return;
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} else {
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// buffer is still in use, get a new one
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b->setUsed(false);
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}
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}
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m_buffer.clear();
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const QSize size(m_backend->shellSurfaceSize());
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m_buffer = m_backend->shmPool()->getBuffer(size, size.width() * 4);
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if (!m_buffer) {
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qCDebug(KWIN_WAYLAND_BACKEND) << "Did not get a new Buffer from Shm Pool";
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m_backBuffer = QImage();
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return;
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}
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auto b = m_buffer.toStrongRef();
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b->setUsed(true);
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m_backBuffer = QImage(b->address(), size.width(), size.height(), QImage::Format_RGB32);
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m_backBuffer.fill(Qt::transparent);
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m_needsFullRepaint = true;
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qCDebug(KWIN_WAYLAND_BACKEND) << "Created a new back buffer";
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}
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void WaylandQPainterBackend::remapBuffer()
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{
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if (!m_buffer) {
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return;
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}
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auto b = m_buffer.toStrongRef();
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if (!b->isUsed()){
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return;
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}
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const QSize size = m_backBuffer.size();
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m_backBuffer = QImage(b->address(), size.width(), size.height(), QImage::Format_RGB32);
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qCDebug(KWIN_WAYLAND_BACKEND) << "Remapped our back buffer";
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}
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bool WaylandQPainterBackend::needsFullRepaint() const
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{
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return m_needsFullRepaint;
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}
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}
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