workspace/ksplash/ksplashx/utils/shade.cpp

   1 // This tool makes the image grayscale and transparent.
   2
   3 #include <QImage>
   4
   5 #include <kcmdlineargs.h>
   6 #include <kapplication.h>
   7 #include <kdebug.h>
   8
   9 int main( int argc, char* argv[] )
  10     {
  11     if( argc != 2 )
  12         return 1;
  13     QImage im( argv[ 1 ] );
  14     if( im.isNull())
  15         return 2;
  16     for( int x = 0;
  17          x < im.width();
  18          ++x )
  19         for( int y = 0;
  20              y < im.height();
  21              ++y )
  22             {
  23             QRgb c = im.pixel( x, y );
  24             QRgb c2 = qRgba( qGray( c ), qGray( c ), qGray( c ), qAlpha( c ) / 2 );
  25             im.setPixel( x, y, c2 );
  26             }
  27     im.save( "result.png", "PNG" );
  28     }