On Mon, 7 Oct 2002 21:14:16 +0200
Felix K�hling <[EMAIL PROTECTED]> wrote:
> Hello,
>
> I wanted to learn more about OpenGL during the weekend and started
> reading the "OpenGL Programming Guide". The first example I tried
> (Example 3.1 Transformed Cube) displayed only a black window with hw
> accel but worked fine with LIBGL_ALWAYS_INDIRECT=1.
>
> I made some modifications to the programme and was then able to
> illustrate some real strange effects. It looks like transformation
> information is either lost or not updated in the radeon driver at
> appropriate times when the window is moved or resized. Could someone
> else with a Radeon 7x00 try to reproduce this please. I attached the
> source code.
>
> I defined three macros which influence the behaviour. The following
> table lists the effects I am seeing depending on which macros are
> defined.
[snip]
> I had similar effects with glxgears (gears disappeared and reappeared
> when moving) about two weeks ago but they disappeared for unknown
> reasons. Now they reappeared. I'm not sure what triggered this. May be a
> cvs update or a make world. Now that I think about it, the first time I
> got this was after the first make world with gcc-3.2.
Right, I get this only when I compile with gcc-3.2. gcc-2.95.4 works
fine. Now I'll go back in CVS and find a version that worked gcc-3.2
(there were some ...). Hopefully this will shed some light on the cause
of the problem.
> I made my tests with 16 and 24 bit color depth, w/ and w/o page
> flipping, w/ and w/o TCL. With RADEON_NO_RAST the cube is always in the
> correct position in the window but disappears and rarely reappears when
> resizing.
>
> Thanks for reading this long mail to the end ;-)
> Felix
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