On 03/24/2014 01:35 PM, Petri Latvala wrote:
On 03/24/2014 12:52 PM, Tapani Pälli wrote:
Test has a shader with only one uniform which is not used. Test checks
that uniform gets its defined explicit location and that there are no
errors generated when glUniform is called to update its value.
Test test does not pass with GTX 660 running the Nvidia proprietary
driver for Linux version 319.32 because the uniform does not get the
location.
To my reading of the spec, glGetUniformLocation can return -1 for the
inactive explicit-located uniform. And even if it's inactive, no
_other_ uniform can get that location.
Yep, I guess -1 and the explicit location would be correct answers. It
kind of sucks though that it is not explicitly stated. Nvidia behavior
is that it returns -1 and causes no error for the glUniform1f call. My
current implementation takes care that we return correct location but if
we are happy with -1 it would simplify/remove some of the code I had to add.
Thanks;
// Tapani
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