OK, handling this in the st_draw.c code is trivial. That'll take care
of the piglit test. I'll have to follow-up later with other state
tracker changes for other cases.
-Brian
On 11/14/2011 08:13 AM, Jose Fonseca wrote:
Is it really necessary to bother pipe drivers with zero size buffers?
Is it really necessary to bother pipe drivers with zero size buffers?
It looks like a useless corner case, which will cause all sort of
implementations problems (e.g., malloc(0) may return NULL; kernel drivers will
likely refuse 0 size buffers), so pipe drivers will need a lot of
if (buffer-
Calling glBufferData(size=0) is legal. Instead of no-oping it, go ahead
and create a gallium buffer of size zero. This lets us avoid a bunch of
NULL pointer checking elsewhere. In the case of a zero-sized VBO, the
bounds checking we do later will prevent invalid memory accesses.
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src/mesa/st
