On Apr 11, 2005 4:34 PM, Brian Paul <[EMAIL PROTECTED]> wrote: > Simon Toedt wrote: > > Has anyone yet looked into ways to improve rendering performance? I > > have noticed that glXSwapBuffers() is slow (30secs +/-5secs on a > > P3/600Mhz) and mainly spends its time in PsOutImageBytes() which calls > > sprintf() in a tight loop: > > (gdb) where > > #0 PsOut_OutImageBytes (self=0x8c91ed0, nBytes=3, bytes=0xbfffec7d > > "") at psout.c:1488 > > #1 0x080d63af in PsPutScaledImage (pDrawable=0x8a69eb0, > > pGC=0x8c6f640, depth=24, x=0, y=0, w=9321, h=13431, leftPad=0, > > format=2, imageRes=0, > > pImage=0x4066e008 "") at PsArea.c:157 > > #2 0x080d6a79 in PsPutImage (pDrawable=0x8a69eb0, pGC=0x8c6f640, > > depth=24, x=0, y=0, w=9321, h=13431, leftPad=0, format=2, > > pImage=0x4066e008 "") at PsArea.c:332 > > #3 0x08291717 in XMesaSwapBuffers (b=0x4063d008) at xm_api.c:2391 > > #4 0x0828dca9 in __MESA_swapBuffers (glxPriv=0x8c6f178) at xf86glx.c:736 > > #5 0x0825a00f in __glXSwapBuffers (cl=0x8a69c60, pc=0x8c90a40 > > "\220\v\003") at glxcmds.c:1340 > > #6 0x082300ff in __glXDispatch (client=0x8a647b0) at glxext.c:435 > > #7 0x08083b69 in Dispatch () at dispatch.c:449 > > #8 0x0806a790 in main (argc=8, argv=0xbffff2a4, envp=0xbffff2c8) at > > main.c:439 > > #9 0x400e48ae in __libc_start_main () from /lib/libc.so.6 > > Well, at line 2391 of xm_api.c, XMesaXPutImage() is being called. > That's a macro: > > #define XMesaPutImage(__d,__b,__gc,__i,__sx,__sy,__x,__y,__w,__h) \ > do { \ > /* Assumes: Images are always in ZPixmap format */ \ > (void) __d; \ > if (__sx || __sy) /* The non-trivial case */ \ > XMesaPutImageHelper(__d,__b,__gc,__i,__sx,__sy,__x,__y,__w,__h); \ > ValidateGC(__b, __gc); \ > (*__gc->ops->PutImage)(__b, __gc, ((XMesaDrawable)(__b))->depth, \ > __x, __y, __w, __h, 0, ZPixmap, \ > ((XMesaImage *)(__i))->data); \ > } while (0) > > The PsPutImage() function is an internal server function in the Xprint > module. I have no idea why that would be getting called.
I've just had a look at the code and did some modifications which improve the performance a lot - its now almost twice as fast. Can anyone pls look at the patch, make sure its correct and then apply it? Thanks! -- Simon
xprint_fast_glxputimage.diff
Description: Binary data