Re: [Mesa3d-dev] Bitmap and Pixmap Positioning

[Brian P. <br...@va...>]

Allen Barnett wrote:
> 
> 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.)

Sounds like a bug.  glBitmap should use rounding as well.



> 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?

Try ./configure --without-glide

-Brian