AuroraMiddleware/qt5base-lts
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Fix antialiasing of rotated non-smooth scaled images

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The fast-path can't antialias edges, and shouldn't be used when
that is requested.

Pick-to: 6.1 5.15
Change-Id: I3a0ce120ab96a6f95d11c165d1f5b356dae009fe
Reviewed-by: Eirik Aavitsland <eirik.aavitsland@qt.io>
This commit is contained in:
Allan Sandfeld Jensen 2021-05-07 17:14:30 +02:00
parent 78d8afed1f
commit ab216eaebf
1 changed files with 2 additions and 1 deletions
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3
src/gui/painting/qpaintengine_raster.cpp
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@ -2369,7 +2369,8 @@ void QRasterPaintEngine::drawImage(const QRectF &r, const QImage &img, const QRe
if (s->matrix.type() > QTransform::TxScale) {
SrcOverTransformFunc func = qTransformFunctions[d->rasterBuffer->format][img.format()];
// The fast transform methods doesn't really work on small targets, see QTBUG-93475
if (func && (!clip || clip->hasRectClip) && targetBounds.width() >= 16 && targetBounds.height() >= 16) {
// And it can't antialias the edges
if (func && (!clip || clip->hasRectClip) && !s->flags.antialiased && targetBounds.width() >= 16 && targetBounds.height() >= 16) {
func(d->rasterBuffer->buffer(), d->rasterBuffer->bytesPerLine(), img.bits(),
img.bytesPerLine(), r, sr, !clip ? d->deviceRect : clip->clipRect,
s->matrix, s->intOpacity);