title: Programmatic graphics toolchain
body: <p>I have drawn an icon in <a href="http://inkscape.org/" rel="nofollow noreferrer">Inkscape</a>, but would now like to programmatically alter it (change the colours slightly for different icon states) and convert it to a tiled PNG format file containing multiple icons with different colours. I know about Inkscape's <em>--export-png</em> options, but can't see a way to make it change the image and/or export multiple times to different parts of the combined image.</p>
  
  <p><strong>Are there any good <em>user-oriented</em> tools for programmatically fiddling with images, or do I have to delve into GD or even manually modifying the SVG XML?</strong></p>