[Piglit] [PATCH 00/23] Tests for all GLSL texture functions (almost)

Marek Olšák maraeo at gmail.com
Fri Jul 4 10:09:53 PDT 2014

See the master branch at:

It passes with my latest Mesa and LLVM patches on radeonsi. Also see
my st/mesa fix for samplerCubeShadow, which you will probably need.

I also forgot to say that it tests all texture targets including the
shadow targets, so it covers shadow mapping too.

On failure, it usually reports which level was expected and which
level was observed, or that a wrong layer or offset was observed (it
doesn't say which one though). It doesn't just report some random
color that you have to interpret by yourself.


On Fri, Jul 4, 2014 at 6:10 PM, Ilia Mirkin <imirkin at alum.mit.edu> wrote:
> On Fri, Jul 4, 2014 at 10:09 AM, Marek Olšák <maraeo at gmail.com> wrote:
>> Hi,
>> This adds tests for all GLSL texture function. The tex-miplevel-selection test is used, since it's a good foundation for testing texturing with mipmaps.
>> All functions are tested except for textureGrad with Cube samplers (I think the GL spec doesn't define how Cube derivates are interpreted).
>> All combinations of the following states: BASE_LEVEL, MAX_LEVEL, MIN_LOD, MAX_LOD, LOD_BIAS or shader-provided bias, mipmap or no mipmap filtering, and scaling texture coordinates to affect the implicit LOD, are tested with almost all GLSL functions. 2DRect is an exception, since it doesn't have any mipmap tree.
>> This doesn't test every aspect of texturing. Generally, the test only checks if the correct level and layer/slice/face is sampled except for the *Offset and 2DRect functions, which test if the correct texel is sampled.
>> There is some overlap with other piglit tests, as well as within the test itself, because it tests both GL2 (e.g. texture2DProj) and GL3 (e.g. textureProj) functions.
> This is awesome! :) One small thing, it's a little dangerous to expect
> arguments with *'s. Shells tend to expand them, so if you have random
> files lying around with the wrong names, it'll make it a lot harder to
> pass it in (would have to be escaped).
> Is there a tree with this somewhere? Should probably give it a go on nouveau.
>   -ilia

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