[Mesa3d-dev] Bitmap and Pixmap Positioning

[Allen B. <ba...@lo...>]

Hi,

In the routine _mesa_DrawPixels in the file src/drawpix.c, the current
raster position is converted to integer coordinates through the IROUND
function (round to nearest, I think?). However, in the routine
_mesa_Bitmap, the raster position is just cast to a GLint. At least on
my system (RedHat 7.1/i386, gcc 2.96), these occasionally give different
values, which I can see as inconsistencies in the positioning of bitmaps
and pixmaps. I was wondering what the reason was for treating these
conversions differently? (_mesa_CopyPixels gets the IROUND, too.)

Also, I downloaded the tar file of MesaLib-3.5 from SourceForge and
tried to build it from scratch, but it would not complete its
./configure run unless src-glut/ was installed from MesaDemos, too.
Perhaps this is worth a note in the documentation? The other minor
glitch I noticed was that RH 7.1 installs the Glide libraries by
default, which causes ./configure to pick up them up and compile the
Glide driver. This treats you to the message: WARNING: This Mesa Library
includes the Glide driver... when you first run a program. Maybe Mesa
could be configured w/o Glide by default now that DRI is the way to go?

Thanks,
Allen