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use QImage::Format_ARGB32_Premultiplied as format for XPM images with transparent color

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Signed-off-by: Ivailo Monev <xakepa10@gmail.com>
This commit is contained in:
Ivailo Monev 2022-01-30 23:44:06 +02:00
parent 95daa0cc80
commit f4bffe55f7
1 changed files with 3 additions and 8 deletions
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11
src/gui/image/qxpmhandler.cpp
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@ -39,17 +39,12 @@ static inline void qt_ximage_to_qimage(XImage *ximage, QImage &image)
const int bpl = image.bytesPerLine();
uchar* imagebits = image.bits();
switch (image.format()) {
case QImage::Format_ARGB32: {
case QImage::Format_ARGB32_Premultiplied: {
for (int h = 0; h < ximage->height; h++) {
uchar* scan = QFAST_SCAN_LINE(imagebits, bpl, h);
for (int w = 0; w < ximage->width; w++) {
const uint xpixel = XGetPixel(ximage, w, h);
// the color is either fully transparent or with no alpha channel
if (xpixel != 0) {
((uint *)scan)[w] = (xpixel | 0xff000000);
} else {
((uint *)scan)[w] = xpixel;
}
((uint *)scan)[w] = PREMUL(xpixel);
}
}
break;
@ -86,7 +81,7 @@ static inline QImage::Format qt_xpm_qimage_format(const XpmAttributes *xpmattrib
QImage::Format format = QImage::systemFormat();
for (int i = 0; i < xpmattributes->ncolors; i++) {
if (qstricmp(xpmattributes->colorTable[i].c_color, "None") == 0) {
format = QImage::Format_ARGB32;
format = QImage::Format_ARGB32_Premultiplied;
break;
}
}