Hamish wrote: > > Doing it client side can be a major performance hit. Apart from > > anything else, all of the rendering has to be done in software; your > > graphics hardware can't help. > > Even if we use the much faster PNG(PPM) driver for fast GUI rendering, it sure > would be nice to click a "quality mode" switch in the GUI to switch to the > Cairo driver to create presentation quality output. For hardcopies (or > softcopy > raster output for presentation or web publication) quality is much more > important than speed. (up the point it takes all night to render) For the GUI > speed becomes the important factor, quality is reduced to a nice bonus.
For presentation quality, I'm not sure that Cairo offers anything that you can't get with PostScript. Either way, anti-aliasing should be done using oversampling rather than at the primitive level. The main obstacles are architectural, i.e. the use of integer coordinates, hard-coded sizes (including line widths), and text rasterisation (I can fix the last one easily enough for the PS driver). -- Glynn Clements <[EMAIL PROTECTED]> _______________________________________________ grass-dev mailing list grass-dev@grass.itc.it http://grass.itc.it/mailman/listinfo/grass-dev
