You can use ghostscript to convert a PDF to an image without AA. You can use ImageMagicks convert as a nice wrapper.<div> </div><div>Groeten, Arjen <div class="gmail_quote">On Wed, Sep 22, 2010 at 7:01 PM, Ian Britten <<a href="mailto:britten@caris.com">britten@caris.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">Hi all, I've got a PDF surface containing pre-rendered data that I'm trying to rasterize (copy) to an image surface. Because the data represents 8-bit colour palette data, I need to rasterize it with AA off, to prevent introducing new colours. Unfortunately, it doesn't seem to be working as I'd expect. Attached is a test program (With comments) showing the problem, namely that the output is AA'd, when it shouldn't be (IMHO). What's really weird/surprising is that I've found a workaround, but it doesn't really make sense (to me). If I disable AA on the *source* PDF, _before_ drawing anything, then I can get non-AA output. To me, setting AA on/off on a PDF surface is nonsensical, and shouldn't have any effect. But it apparently does. Additionally, the workaround doesn't really fit in my workflow, since it requires being set before any data is drawn... Does anyone have any insight/info about what I'm seeing, or maybe have an alternate strategy? To me, it seems like a bug... Many thanks for any info! Ian -- cairo mailing list <a href="mailto:cairo@cairographics.org">cairo@cairographics.org</a> <a href="http://lists.cairographics.org/mailman/listinfo/cairo" target="_blank">http://lists.cairographics.org/mailman/listinfo/cairo</a> </blockquote></div> </div>