Qt provides four classes for handling image data: PySide.QtGui.QImage, PySide. On X11, Mac and Symbian, a PySide.QtGui. QPainter functions or by converting the PySide.QtGui.QPixmap to a PySide.QtGui.QImage. However, the. QtGui.QPixmap class also supports conversion between HBITMAP and PySide.QtGui.

• Status:Closed
• Resolution: Out of scope
• Fix Version/s:Some future release
• Labels:

QImage can in some cases draw text wrongly when comparing it to how QPixmap draws it.

This only happens on Mac.

Reproducible with the following example:

• The letter '7' in the bad.png is missing a pixel.
  #include <qpainter>
  #include <qimage>
  #include <qpixmap>
  #include <qapplication>
  #include <qcolor>

int main(int argc, char** argv)
{
QApplication app(argc, argv);

QPixmap pm(QSize(100, 100));
pm.fill(QColor(0, 0, 0, 0));
QFont f('Courier', 8);
f.setStyleHint(QFont::AnyStyle, QFont::NoAntialias);

QPainter ppm(&pm);
ppm.setFont(f);
ppm.setPen(Qt::white);

ppm.drawText(QRect(0, 0, 100, 100), 0x484, '012345678 abcdefg');
pm.save('good.png', 'PNG');

QImage img(QSize(100, 100), QImage::Format_ARGB32);

QPainter imgP(&img);
imgP.setFont(f);
imgP.setPen(Qt::white);

This application is very user-friendly and natural. All the windows functions are clear and separated.Search Engine:.

imgP.drawText(QRect(0, 0, 100, 100), 0x484, '012345678 abcdefg');

img.save('bad.png', 'PNG');
}

• Assignee:

  Simon Hausmann

  Reporter:

  Administrator

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• Created:

  Updated:

  Resolved: