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// Copyright (C) 2016 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
#include "qxcbimage.h"
#include <QtCore/QtEndian>
#include <QtGui/QColor>
#include <QtGui/private/qimage_p.h>
#include <QtGui/private/qdrawhelper_p.h>
#include <xcb/render.h>
#include <xcb/xcb_renderutil.h>
#include "qxcbconnection.h"
#include "qxcbintegration.h"
namespace {
QImage::Format imageFormatForMasks(int depth, int bits_per_pixel, int red_mask, int blue_mask)
{
if (bits_per_pixel == 32) {
switch (depth) {
case 32:
if (red_mask == 0xff0000 && blue_mask == 0xff)
return QImage::Format_ARGB32_Premultiplied;
#if Q_BYTE_ORDER == Q_LITTLE_ENDIAN
if (red_mask == 0xff && blue_mask == 0xff0000)
return QImage::Format_RGBA8888_Premultiplied;
#else
if (unsigned(red_mask) == unsigned(0xff000000) && blue_mask == 0xff00)
return QImage::Format_RGBA8888_Premultiplied;
#endif
if (red_mask == 0x3ff && blue_mask == 0x3ff00000)
return QImage::Format_A2BGR30_Premultiplied;
if (red_mask == 0x3ff00000 && blue_mask == 0x3ff)
return QImage::Format_A2RGB30_Premultiplied;
break;
case 30:
if (red_mask == 0x3ff && blue_mask == 0x3ff00000)
return QImage::Format_BGR30;
if (blue_mask == 0x3ff && red_mask == 0x3ff00000)
return QImage::Format_RGB30;
break;
case 24:
if (red_mask == 0xff0000 && blue_mask == 0xff)
return QImage::Format_RGB32;
#if Q_BYTE_ORDER == Q_LITTLE_ENDIAN
if (red_mask == 0xff && blue_mask == 0xff0000)
return QImage::Format_RGBX8888;
#else
if (unsigned(red_mask) == unsigned(0xff000000) && blue_mask == 0xff00)
return QImage::Format_RGBX8888;
#endif
break;
}
} else if (bits_per_pixel == 16) {
if (depth == 16 && red_mask == 0xf800 && blue_mask == 0x1f)
return QImage::Format_RGB16;
if (depth == 15 && red_mask == 0x7c00 && blue_mask == 0x1f)
return QImage::Format_RGB555;
}
return QImage::Format_Invalid;
}
} // namespace
QT_BEGIN_NAMESPACE
bool qt_xcb_imageFormatForVisual(QXcbConnection *connection, uint8_t depth, const xcb_visualtype_t *visual,
QImage::Format *imageFormat, bool *needsRgbSwap)
{
Q_ASSERT(connection && visual && imageFormat);
if (needsRgbSwap)
*needsRgbSwap = false;
*imageFormat = QImage::Format_Invalid;
if (depth == 8) {
if (visual->_class == XCB_VISUAL_CLASS_GRAY_SCALE) {
*imageFormat = QImage::Format_Grayscale8;
return true;
}
#if QT_CONFIG(xcb_native_painting)
if (QXcbIntegration::instance() && QXcbIntegration::instance()->nativePaintingEnabled()) {
*imageFormat = QImage::Format_Indexed8;
return true;
}
#endif
return false;
}
const xcb_format_t *format = connection->formatForDepth(depth);
if (!format)
return false;
const bool connectionEndianSwap = connection->imageNeedsEndianSwap();
// We swap the masks and see if we can recognize it as a host format
const quint32 red_mask = connectionEndianSwap ? qbswap(visual->red_mask) : visual->red_mask;
const quint32 blue_mask = connectionEndianSwap ? qbswap(visual->blue_mask) : visual->blue_mask;
*imageFormat = imageFormatForMasks(depth, format->bits_per_pixel, red_mask, blue_mask);
if (*imageFormat != QImage::Format_Invalid)
return true;
if (needsRgbSwap) {
*imageFormat = imageFormatForMasks(depth, format->bits_per_pixel, blue_mask, red_mask);
if (*imageFormat != QImage::Format_Invalid) {
*needsRgbSwap = true;
return true;
}
}
qWarning("Unsupported screen format: depth: %d, bits_per_pixel: %d, red_mask: %x, blue_mask: %x", depth, format->bits_per_pixel, red_mask, blue_mask);
return false;
}
QPixmap qt_xcb_pixmapFromXPixmap(QXcbConnection *connection, xcb_pixmap_t pixmap,
int width, int height, int depth,
const xcb_visualtype_t *visual)
{
xcb_connection_t *conn = connection->xcb_connection();
auto image_reply = Q_XCB_REPLY_UNCHECKED(xcb_get_image, conn, XCB_IMAGE_FORMAT_Z_PIXMAP, pixmap,
0, 0, width, height, 0xffffffff);
if (!image_reply) {
return QPixmap();
}
uint8_t *data = xcb_get_image_data(image_reply.get());
uint32_t length = xcb_get_image_data_length(image_reply.get());
QPixmap result;
QImage::Format format;
bool needsRgbSwap;
if (qt_xcb_imageFormatForVisual(connection, depth, visual, &format, &needsRgbSwap)) {
uint32_t bytes_per_line = length / height;
QImage image(const_cast<uint8_t *>(data), width, height, bytes_per_line, format);
if (needsRgbSwap)
image = std::move(image).rgbSwapped();
// fix-up alpha channel
if (format == QImage::Format_RGB32 || format == QImage::Format_RGBX8888) {
QRgb *p = (QRgb *)image.bits();
for (int y = 0; y < height; ++y) {
for (int x = 0; x < width; ++x)
p[x] |= 0xff000000;
p += bytes_per_line / 4;
}
} else if (format == QImage::Format_BGR30 || format == QImage::Format_RGB30) {
QRgb *p = (QRgb *)image.bits();
for (int y = 0; y < height; ++y) {
for (int x = 0; x < width; ++x)
p[x] |= 0xc0000000;
p += bytes_per_line / 4;
}
}
result = QPixmap::fromImage(image.copy());
}
return result;
}
xcb_pixmap_t qt_xcb_XPixmapFromBitmap(QXcbScreen *screen, const QImage &image)
{
xcb_connection_t *conn = screen->xcb_connection();
QImage bitmap = image.convertToFormat(QImage::Format_MonoLSB);
const QRgb c0 = QColor(Qt::black).rgb();
const QRgb c1 = QColor(Qt::white).rgb();
if (bitmap.color(0) == c0 && bitmap.color(1) == c1) {
bitmap.invertPixels();
bitmap.setColor(0, c1);
bitmap.setColor(1, c0);
}
const int width = bitmap.width();
const int height = bitmap.height();
const qsizetype bytesPerLine = bitmap.bytesPerLine();
int destLineSize = width / 8;
if (width % 8)
++destLineSize;
const uchar *map = bitmap.bits();
uint8_t *buf = new uint8_t[height * destLineSize];
for (int i = 0; i < height; i++)
memcpy(buf + (destLineSize * i), map + (bytesPerLine * i), destLineSize);
xcb_pixmap_t pm = xcb_create_pixmap_from_bitmap_data(conn, screen->root(), buf,
width, height, 1, 0, 0, nullptr);
delete[] buf;
return pm;
}
xcb_cursor_t qt_xcb_createCursorXRender(QXcbScreen *screen, const QImage &image,
const QPoint &spot)
{
xcb_connection_t *conn = screen->xcb_connection();
const int w = image.width();
const int h = image.height();
auto formats = Q_XCB_REPLY(xcb_render_query_pict_formats, conn);
if (!formats) {
qWarning("qt_xcb_createCursorXRender: query_pict_formats failed");
return XCB_NONE;
}
xcb_render_pictforminfo_t *fmt = xcb_render_util_find_standard_format(formats.get(),
XCB_PICT_STANDARD_ARGB_32);
if (!fmt) {
qWarning("qt_xcb_createCursorXRender: Failed to find format PICT_STANDARD_ARGB_32");
return XCB_NONE;
}
QImage img = image.convertToFormat(QImage::Format_ARGB32_Premultiplied);
xcb_image_t *xi = xcb_image_create(w, h, XCB_IMAGE_FORMAT_Z_PIXMAP,
32, 32, 32, 32,
QSysInfo::ByteOrder == QSysInfo::BigEndian ? XCB_IMAGE_ORDER_MSB_FIRST : XCB_IMAGE_ORDER_LSB_FIRST,
XCB_IMAGE_ORDER_MSB_FIRST,
nullptr, 0, nullptr);
if (!xi) {
qWarning("qt_xcb_createCursorXRender: xcb_image_create failed");
return XCB_NONE;
}
xi->data = (uint8_t *) malloc(xi->stride * h);
if (!xi->data) {
qWarning("qt_xcb_createCursorXRender: Failed to malloc() image data");
xcb_image_destroy(xi);
return XCB_NONE;
}
memcpy(xi->data, img.constBits(), img.sizeInBytes());
xcb_pixmap_t pix = xcb_generate_id(conn);
xcb_create_pixmap(conn, 32, pix, screen->root(), w, h);
xcb_render_picture_t pic = xcb_generate_id(conn);
xcb_render_create_picture(conn, pic, pix, fmt->id, 0, nullptr);
xcb_gcontext_t gc = xcb_generate_id(conn);
xcb_create_gc(conn, gc, pix, 0, nullptr);
xcb_image_put(conn, pix, gc, xi, 0, 0, 0);
xcb_free_gc(conn, gc);
xcb_cursor_t cursor = xcb_generate_id(conn);
xcb_render_create_cursor(conn, cursor, pic, spot.x(), spot.y());
free(xi->data);
xcb_image_destroy(xi);
xcb_render_free_picture(conn, pic);
xcb_free_pixmap(conn, pix);
return cursor;
}
QT_END_NAMESPACE
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