QPainter drawText on a QImage: Wrong text color???!!!
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QImage tmpImage = rgb32.convertToFormat(QImage::Format_ARGB32_Premultiplied);QPainter painter;
painter.begin(&tmpImage);
painter.setPen(fontColor); // The font color comes from user select on a QColorDialog
painter.setFont(QFont("Chicago", fontSize)); // The font size comes from user input
painter.setCompositionMode(QPainter::CompositionMode_Source);painter.drawText(penPos.x(), penPos.y(), QString::number(num)); // Draw a number on the image
painter.end();
rgb32 = tmpImage.convertToFormat(QImage::Format_RGB32);
@Hello everyone :)
I want to draw a number on a QImage (a series of QImages) fetched from a video sequence. I used the code above.
The problem is, the text color, which comes from user select, is not printed correctly. For example, the fontColor is Qt::red, but a blue text were printed.
I also tried other compositionmode, such as
@painter.setCompositionMode(QPainter::CompositionMode_SourceOver);@
or
@painter.setCompositionMode(QPainter::CompositionMode_Clear);@but nothing changed.
Can anybody help me?
Thanks in advanced.
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- Did you try to draw text on usual image loaded to tmpImage?
- Why you use Format_ARGB32_Premultiplied? Video didn't has alpha layer.