diff options
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/README.DJ | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/docs/README.DJ b/docs/README.DJ index ed7f8c858ba..0ec3622a5a7 100644 --- a/docs/README.DJ +++ b/docs/README.DJ @@ -111,7 +111,7 @@ FAQ: Q) I made a simple application and it does nothing. It exits right away. Not even a blank screen. - A) The pure software drivers (VESA/VGA) support only double-buffered modes. + A) Pure software drivers (VESA/VGA/NUL) support only double-buffered modes. A) Another weird "feature" is that buffer width must be multiple of 8 (I'm a lazy programmer and I found that the easiest way to keep buffer handling at peak performance ;-). @@ -126,6 +126,13 @@ FAQ: from `Mesa/src/glut/dos/Makefile.DJ' before (re)making GLUT. Beware, this means you will never EVER be able to safely use `glut.dxe'! + Q) What is NUL driver good for, if I don't get any output at all? + A) For debugging. The NUL driver is very much like OSMesa. Everything is + done just the same as VESA/VGA drivers, only it doesn't touches your + video hardware. You can query the actual buffer by issuing: + DMesaGetIntegerv(DMESA_GET_BUFFER_ADDR, &buffer); + and dump it to a file. + Q) How do I query for a list of available video modes to choose as a visual? A) This is an ugly hack, for which I'm sure I'll burn in hell. First, query for a list of modes: @@ -189,7 +196,11 @@ chosen in such a way that first window will fit. If you need high resolution with small windows, set initial position far to the right (or way down); then you can move them back to any position right before the main loop. -The following environment variables can customize GLUT behaviour: + + +Environment variables: +~~~~~~~~~~~~~~~~~~~~~~ + DMESA_NULDRV - (any value) force NUL driver GLUT_FPS - print frames/second statistics to stderr DMESA_GLUT_REFRESH - set vertical screen refresh rate (VESA3) DMESA_GLUT_BPP - set default bits per pixel (VGA needs 8) @@ -248,6 +259,7 @@ v1.5 (jan-2004) x more changes to the 3dfx driver v1.6 (???-2004) + + implemented NUL driver + added DMesaGetProcAddress and glutGetProcAddress ! fixed a horrible bug in VGA initialization routine |