[Bug 32945] [r300g] HyperZ: Wrong size in the HiZ clear packet causes the zbuffer not to be fully cleared

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Thu Mar 3 12:52:57 PST 2011


--- Comment #20 from Marek Olšák <maraeo at gmail.com> 2011-03-03 12:52:56 PST ---
I can't fix this by myself, because I don't have your GPU. If you want to play
with it, here's how:

In mesa/src/gallium/drivers/r300, there is file r300_texture_desc.c. On lines
356 and 357, there are two arrays containing info how HiZ buffers should be

static unsigned hiz_align_x[4] = {8, 32, 48, 32};
static unsigned hiz_align_y[4] = {8, 8, 8, 32};

The 3rd element in those arrays contains a number for your GPU (because your
GPU has 3 pipes). Currently the alignment is 48x8. Feel free to try a different
size, like 32x32, 64x64, 48x32, whatever comes to your mind.

If nothing helps, it means the alignment is right and the problem is somewhere

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