[XFree86] RADEON 2D offscreen pixmaps limitation

[Le Clech Philippe]

Dear all,   I am using a Radeon 8500 under XFree86 4.2.1, and I discovered in the file radeon-accel.c that the amount of memory available for offscreen pixmaps is limited because the accel engine uses 14 bits signed. This is a big limitation (for me) that isn't mentioned elsewhere ! Even with a 128 Mb board, the number of offscreen pixmaps is very limited (8192 lines) compared to the available memory ! My question is : with the recent RADEON 9500 / 9700, is there the same limitation ? In the driver source, there is no specific code for it, but is it because the hardware limitation remains or because nobody has modified the code ? In dual headed configuration, are there 8192 lines of memory available per head, or is it global ? Thank you very much for your answer, it will help me very much.   Regards, Philippe le Clech Software developer