toc@batcomputer.tn.cornell.edu (Timothy F. O'Connor) (10/10/89)
Is it possible to directly read the contents of the z-buffer on the HP Turbo SRX? I know that the z-buffer memory can be read, 8 bits at a time, using bank_switch(3G) and block_read(3G). Unfortunately, these routines are fairly slow. I'd really like the z-buffer analog to the frame buffer's R_GET_FRAME_BUFFER gescape. (As briefly outlined in the HP 98731 device driver manual, the R_GET_FRAME_BUFFER gescape returns the starting address of the frame buffer, allowing all 24 bits of the frame buffer to be read at one time). Many thanks, Tim (toc@wisdom.graphics.cornell.edu)