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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the plugins of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QWAYLANDSHMFORMATHELPER_H
#define QWAYLANDSHMFORMATHELPER_H
#include <QtGui/QImage>
//the correct protocol header for the wayland server or wayland client has to be
//included before this file is included
QT_BEGIN_NAMESPACE
class QWaylandShmFormatHelper
{
public:
static inline wl_shm_format fromQImageFormat(QImage::Format format);
static inline QImage::Format fromWaylandShmFormat(wl_shm_format format);
static inline QVector<wl_shm_format> supportedWaylandFormats();
private:
//IMPLEMENTATION (which has to be inline in the header because of the include trick)
struct Array
{
Array(const size_t size, const wl_shm_format *data)
: size(size)
, data(data)
{ }
const size_t size;
const wl_shm_format *data;
};
static const Array getData()
{
static wl_shm_format formats_array[] = {
wl_shm_format(INT_MIN), //Format_Invalid,
wl_shm_format(INT_MIN), //Format_Mono,
wl_shm_format(INT_MIN), //Format_MonoLSB,
wl_shm_format(INT_MIN), //Format_Indexed8,
WL_SHM_FORMAT_XRGB8888, //Format_RGB32,
WL_SHM_FORMAT_ARGB8888, //Format_ARGB32,
WL_SHM_FORMAT_ARGB8888, //Format_ARGB32_Premultiplied,
WL_SHM_FORMAT_RGB565, //Format_RGB16,
wl_shm_format(INT_MIN), //Format_ARGB8565_Premultiplied,
wl_shm_format(INT_MIN), //Format_RGB666,
wl_shm_format(INT_MIN), //Format_ARGB6666_Premultiplied,
WL_SHM_FORMAT_XRGB1555, //Format_RGB555,
wl_shm_format(INT_MIN), //Format_ARGB8555_Premultiplied,
WL_SHM_FORMAT_RGB888, //Format_RGB888,
WL_SHM_FORMAT_XRGB4444, //Format_RGB444,
WL_SHM_FORMAT_ARGB4444, //Format_ARGB4444_Premultiplied,
WL_SHM_FORMAT_XBGR8888, //Format_RGBX8888,
WL_SHM_FORMAT_ABGR8888, //Format_RGBA8888,
WL_SHM_FORMAT_ABGR8888, //Format_RGBA8888_Premultiplied,
WL_SHM_FORMAT_XBGR2101010, //Format_BGR30,
WL_SHM_FORMAT_ARGB2101010, //Format_A2BGR30_Premultiplied,
WL_SHM_FORMAT_XRGB2101010, //Format_RGB30,
WL_SHM_FORMAT_ARGB2101010, //Format_A2RGB30_Premultiplied,
WL_SHM_FORMAT_C8, //Format_Alpha8,
WL_SHM_FORMAT_C8 //Format_Grayscale8,
};
const size_t size = sizeof(formats_array) / sizeof(*formats_array);
return Array(size, formats_array);
}
};
wl_shm_format QWaylandShmFormatHelper::fromQImageFormat(QImage::Format format)
{
Array array = getData();
if (array.size <= size_t(format))
return wl_shm_format(INT_MIN);
return array.data[format];
}
QImage::Format QWaylandShmFormatHelper::fromWaylandShmFormat(wl_shm_format format)
{
Array array = getData();
for (size_t i = 0; i < array.size; i++) {
if (array.data[i] == format)
return QImage::Format(i);
}
return QImage::Format_Invalid;
}
QVector<wl_shm_format> QWaylandShmFormatHelper::supportedWaylandFormats()
{
QVector<wl_shm_format> retFormats;
Array array = getData();
for (size_t i = 0; i < array.size; i++) {
if (int(array.data[i]) != INT_MIN
&& !retFormats.contains(array.data[i])) {
retFormats.append(array.data[i]);
}
}
return retFormats;
}
QT_END_NAMESPACE
#endif //QWAYLANDSHMFORMATHELPER_H
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