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dither_to_Mono() now requires 32-bit source image

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Signed-off-by: Ivailo Monev <xakepa10@gmail.com>
This commit is contained in:
Ivailo Monev 2021-12-23 15:35:18 +02:00
parent 0dc381dea6
commit 80652bfdb1
1 changed files with 9 additions and 3 deletions
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10
src/gui/image/qimage.cpp
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@ -1776,6 +1776,7 @@ static void dither_to_Mono(QImageData *dst, const QImageData *src,
{
Q_ASSERT(src->width == dst->width);
Q_ASSERT(src->height == dst->height);
Q_ASSERT(src->depth == 32);
Q_ASSERT(dst->format == QImage::Format_Mono || dst->format == QImage::Format_MonoLSB);
dst->mono0 = QRgb(0xffffffff);
@ -2693,12 +2694,17 @@ QImage QImage::transformed(const QMatrix &matrix, Qt::TransformationMode mode) c
*/
QImage QImage::createAlphaMask(Qt::ImageConversionFlags flags) const
{
if (!d || d->format == QImage::Format_RGB32)
if (!d || d->format == QImage::Format_RGB32 || d->format == QImage::Format_RGB16)
return QImage();
QImage source(*this);
if (d->depth != 32) {
source = source.convertToFormat(QImage::Format_ARGB32);
}
QImage mask(d->width, d->height, Format_MonoLSB);
if (!mask.isNull()) {
dither_to_Mono(mask.d, d, flags, true);
dither_to_Mono(mask.d, source.d, flags, true);
}
return mask;
}