rfrench@athena.mit.edu (Robert S. French) (08/10/88)
I've noticed (in a rather painful manner) that the pixmap handling code in Xqdss is amazingly slow. For example, creating a 1000x1000x8 pixmap and then filling it with WhitePixel using XFillRectangle takes over 2 minutes! (This is quite worthless, considering I was hoping to do double-buffering). Does anyone know why this is so, and if so how to fix it? All rendering routines appear to be this slow. (like 15 seconds to draw a small 4-sided polygon). Thanks, Rob French DEC/MIT Project Athena rfrench@athena.mit.edu ... {backbone}!bloom-beacon!athena.mit.edu!rfrench
RWS@ZERMATT.LCS.MIT.EDU (Robert Scheifler) (08/10/88)
The QDSS pixmap handling is amazingly slow because it uses the amazing MI code for pixmap operations. If anyone wants to figure out how to rework the code to force pixmaps into on-display off-screen memory, or how to make use of the cfb code instead, and give the results back to us, great.