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  1. Qt
  2. QTBUG-24628

Text Rendering produces different results for different PaintDevices ( QPixmap and QImage )

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: P3: Somewhat important
    • Resolution: Invalid
    • Affects Version/s: 4.7.0, 5.1.1
    • Fix Version/s: None
    • Component/s: GUI: Painting
    • Labels:
      None
    • Environment:
      Windows 7 64 bit

      Description

      I've attached the results. When using QImage as PaintDevice, no antialiasing or sub pixel rendering is performed.

      Here is the code
      You can just change the commented line to test with the other PaintDevice.

      QApplication app(argc, argv);
      
      QImage img( 128 , 32 , QImage::Format_ARGB32 );
      //	QPixmap img( 128 , 32 );
      QPainter p( &img );
      
      p.fillRect(0,0,128,32, Qt::white );
      
      QFont font( "Courier New" , 10 );
      QPen pen( QColor( 128 , 0 , 0 ) );
      
      p.setPen( pen );
      p.setFont( font );
      
      p.drawText(  18 , 18 , "Sample Text");
      
      img.save( "asdf.png" );
      

        Attachments

        1. qimage.png
          qimage.png
          0.4 kB
        2. qpixmap.png
          qpixmap.png
          0.8 kB
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            People

            • Assignee:
              sletta Gunnar Sletta
              Reporter:
              mserdarsanli Mustafa Serdar Şanlı
            • Votes:
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              Dates

              • Created:
                Updated:
                Resolved:

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