108 lines
2.6 KiB
C++
108 lines
2.6 KiB
C++
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/********************************************************************
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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) 2014 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 "buffer_interface.h"
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#include "surface_interface.h"
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namespace KWin
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{
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namespace WaylandServer
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{
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BufferInterface::BufferInterface(wl_resource *resource, SurfaceInterface *parent)
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: QObject(parent)
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, m_buffer(resource)
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, m_shmBuffer(wl_shm_buffer_get(m_buffer))
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, m_surface(parent)
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, m_refCount(0)
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{
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}
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BufferInterface::~BufferInterface()
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{
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Q_ASSERT(m_refCount == 0);
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releaseImage();
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}
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void BufferInterface::releaseImage()
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{
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if (m_image.isNull()) {
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return;
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}
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// first destroy it
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m_image = QImage();
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wl_shm_buffer_end_access(m_shmBuffer);
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}
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void BufferInterface::ref()
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{
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m_refCount++;
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}
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void BufferInterface::unref()
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{
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Q_ASSERT(m_refCount > 0);
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m_refCount--;
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if (m_refCount == 0) {
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releaseImage();
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wl_buffer_send_release(m_buffer);
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deleteLater();
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}
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}
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QImage::Format BufferInterface::format() const
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{
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switch (wl_shm_buffer_get_format(m_shmBuffer)) {
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case WL_SHM_FORMAT_ARGB8888:
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return QImage::Format_ARGB32;
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case WL_SHM_FORMAT_XRGB8888:
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return QImage::Format_RGB32;
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default:
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return QImage::Format_Invalid;
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}
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}
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QImage BufferInterface::data()
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{
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if (m_image.isNull()) {
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createImage();
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}
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return m_image;
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}
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void BufferInterface::createImage()
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{
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if (!m_shmBuffer) {
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return;
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}
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const QImage::Format imageFormat = format();
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if (imageFormat == QImage::Format_Invalid) {
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return;
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}
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wl_shm_buffer_begin_access(m_shmBuffer);
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m_image = QImage((const uchar*)wl_shm_buffer_get_data(m_shmBuffer),
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wl_shm_buffer_get_width(m_shmBuffer),
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wl_shm_buffer_get_height(m_shmBuffer),
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wl_shm_buffer_get_stride(m_shmBuffer),
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imageFormat);
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}
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}
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}
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