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Bug
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Resolution: Cannot Reproduce
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Not Evaluated
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4.7.0
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None
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X11, RHEL4.6,
The following code:
pixmap.setMask(pixmap.createMaskFromColor(QColor(255,0,255)));
QPixmap scaled_pixmap = pixmap.scaled(scaled_width, scaled_height, Qt::KeepAspectRatio, Qt::SmoothTransformation);
worked correctly in Qt 4.6 to generate a scaled pixmap with the mask in tact. In 4.7, the resulting bitmap has no transparency when used.
The problem also occurs when using QIcon with a QPixmap with a mask.
The following work-around works OK to generate a scaled, transparent pixmap:
QBitmap mask = pixmap.createMaskFromColor(QColor(255,0,255));
pixmap.setMask(mask);
QPixmap transparent_pixmap(pixmap.size());
transparent_pixmap.fill(QColor(255, 255, 255, 0));
QPainter painter(&transparent_pixmap);
painter.drawPixmap(0, 0, pixmap);
painter.end();
QPixmap scaled_pixmap = transparent_pixmap.scaled(scaled_width, scaled_height, Qt::KeepAspectRatio, Qt::SmoothTransformation);