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// Copyright (C) 2020 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef QWAYLANDSHAREDMEMORYFORMATHELPER_H
#define QWAYLANDSHAREDMEMORYFORMATHELPER_H
#include <QtGui/QImage>
#include <QtCore/private/qglobal_p.h>
//the correct protocol header for the wayland server or wayland client has to be
//included before this file is included
QT_BEGIN_NAMESPACE
class QWaylandSharedMemoryFormatHelper
{
public:
static inline wl_shm_format fromQImageFormat(QImage::Format format);
static inline QImage::Format fromWaylandShmFormat(wl_shm_format format)
{
switch (format) {
case WL_SHM_FORMAT_XRGB8888: return QImage::Format_RGB32;
case WL_SHM_FORMAT_ARGB8888: return QImage::Format_ARGB32_Premultiplied;
case WL_SHM_FORMAT_RGB565: return QImage::Format_RGB16;
case WL_SHM_FORMAT_XRGB1555: return QImage::Format_RGB555;
case WL_SHM_FORMAT_RGB888: return QImage::Format_RGB888;
case WL_SHM_FORMAT_BGR888: return QImage::Format_BGR888;
case WL_SHM_FORMAT_XRGB4444: return QImage::Format_RGB444;
case WL_SHM_FORMAT_ARGB4444: return QImage::Format_ARGB4444_Premultiplied;
case WL_SHM_FORMAT_XBGR8888: return QImage::Format_RGBX8888;
case WL_SHM_FORMAT_ABGR8888: return QImage::Format_RGBA8888_Premultiplied;
case WL_SHM_FORMAT_XBGR2101010: return QImage::Format_BGR30;
case WL_SHM_FORMAT_ABGR2101010: return QImage::Format_A2BGR30_Premultiplied;
case WL_SHM_FORMAT_XRGB2101010: return QImage::Format_RGB30;
case WL_SHM_FORMAT_ARGB2101010: return QImage::Format_A2RGB30_Premultiplied;
case WL_SHM_FORMAT_C8: return QImage::Format_Alpha8;
default: return QImage::Format_Invalid;
}
}
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 = nullptr;
};
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_ABGR2101010, //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,
wl_shm_format(INT_MIN), //Format_RGBX64,
wl_shm_format(INT_MIN), //Format_RGBA64,
wl_shm_format(INT_MIN), //Format_RGBA64_Premultiplied,
wl_shm_format(INT_MIN), //Format_Grayscale16,
WL_SHM_FORMAT_BGR888, //Format_BGR888
};
const size_t size = sizeof(formats_array) / sizeof(*formats_array);
return Array(size, formats_array);
}
};
wl_shm_format QWaylandSharedMemoryFormatHelper::fromQImageFormat(QImage::Format format)
{
Array array = getData();
if (array.size <= size_t(format))
return wl_shm_format(INT_MIN);
return array.data[format];
}
QT_END_NAMESPACE
#endif //QWAYLANDSHAREDMEMORYFORMATHELPER_H
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