kwin/backends/x11/scene_qpainter_x11_backend.cpp

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/********************************************************************
KWin - the KDE window manager
This file is part of the KDE project.
Copyright (C) 2015 Martin Gräßlin <mgraesslin@kde.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*********************************************************************/
#include "scene_qpainter_x11_backend.h"
#include "x11windowed_backend.h"
namespace KWin
{
X11WindowedQPainterBackend::X11WindowedQPainterBackend(X11WindowedBackend *backend)
: QPainterBackend()
, m_backBuffer(backend->size(), QImage::Format_RGB32)
, m_backend(backend)
{
}
X11WindowedQPainterBackend::~X11WindowedQPainterBackend()
{
if (m_gc) {
xcb_free_gc(m_backend->connection(), m_gc);
}
}
QImage *X11WindowedQPainterBackend::buffer()
{
return &m_backBuffer;
}
bool X11WindowedQPainterBackend::needsFullRepaint() const
{
return m_needsFullRepaint;
}
void X11WindowedQPainterBackend::prepareRenderingFrame()
{
}
void X11WindowedQPainterBackend::screenGeometryChanged(const QSize &size)
{
if (m_backBuffer.size() != size) {
m_backBuffer = QImage(size, QImage::Format_RGB32);
m_backBuffer.fill(Qt::black);
m_needsFullRepaint = true;
}
}
void X11WindowedQPainterBackend::present(int mask, const QRegion &damage)
{
Q_UNUSED(mask)
Q_UNUSED(damage)
xcb_connection_t *c = m_backend->connection();
const xcb_window_t window = m_backend->window();
if (m_gc == XCB_NONE) {
m_gc = xcb_generate_id(c);
xcb_create_gc(c, m_gc, window, 0, nullptr);
}
// TODO: only update changes?
xcb_put_image(c, XCB_IMAGE_FORMAT_Z_PIXMAP, window, m_gc,
m_backBuffer.width(), m_backBuffer.height(), 0, 0, 0, 24,
m_backBuffer.byteCount(), m_backBuffer.constBits());
}
bool X11WindowedQPainterBackend::usesOverlayWindow() const
{
return false;
}
}