Re: [Mesa3d-users] Incorrect Coloring of 3D with Mesa

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

rnddim wrote:
> That bug sounds about right. But of course, it's unresolved. :(
> 
> I suppose what makes me the maddest is that I can't find out where the 
> bug occurs. I'm hoping there's a line of code or two I can change in my 
> personal copy of Mesa to help counteract the problem, if it's a problem 
> with something beyond Mesa (which it seems like it is).
> 
> Comparing my gears picture and the one on the Mesa3d homepage (which I'm 
> assuming is a snapshot of the correct gears output), this is what 
> happens (good output on mesa3d.org, bad output in my original attachment):
> 
> Good Output -> Bad Output
> Red Gear -> Green Gear (the one that may look cyan or light blue to some 
> in the picture)
> Green Gear -> Red Gear (may look pink)
> Blue Gear -> Alpha (transparent) Gear (it looks like a light gray-blue 
> gear, but that's transparency at work)
> Alpha (No) Background (appears black) -> Blue Background
> 
> Based on this, it's mostly likely that any RGBA color value is read as 
> GRAB. I wonder if there's anywhere in the Mesa source code, probably 
> where colors are first read, where I could insert an 'easy fix'.

Possibly.  Look through src/mesa/drivers/dri/r128/* for instances of 
MESA_FORMAT_*.

Perhaps MESA_FORMAT_ARGB8888 should be PIPE_FORMAT_ARGB8888_REV, or 
something like that.  See src/mesa/main/formats.h for the available 
pixel formats.

I doubt that any of the active DRI developers have R128 hardware on 
hand so hopefully you can figure it out.

BTW, you should use Mesa 7.7 if you aren't already.

-Brian