[Piglit] [PATCH] gl-3.0: add a test to stress the bound resource limits

[Brian Paul]

On 07/09/2014 03:10 PM, Matthew McClure wrote:
> I reproduced Brian's issue with the NVIDIA drivers. Below is a list of the configurations I ran:
>
> GeForce GTX 650
> * Ubuntu NVIDIA 304.88 - Allocation of Variable[GL_MAX_VARYING_FLOATS] succeeded, VBO usage succeeds.
> * Ubuntu NVIDIA 331.89 - Allocation of Variable[GL_MAX_VARYING_FLOATS] fails with the following message:
>
>       0(2) : error C5041: cannot locate suitable resource to bind variable "Variable". Possibly large array.
>
> GeForce GT 740M
> * Windows 8.1 NVIDIA 332.88 - Allocation of Variable[GL_MAX_VARYING_FLOATS] succeeded, VBO usage fails.
>
> Due to the issues above, I clamped the return value of GL_MAX_VARYING_FLOATS to 32 and only used immediate mode rendering with one attribute. A developer can disable varying floats clamping by specifying the command line argument "-dontClampMaxVaryings". A developer can also re-enable different draw paths using command line arguments "-drawArraysVBO" or "-drawElementsVBO".
>
> Below is an updated patch to address the issues, as they are not a blocking issue for the test to be useful.


OK, the test passes now with my nvidia driver, softpipe, llvmpipe and svga.

A couple more comments on the code.

1. Some of the static, initialized arrays could be const-qualified.  Not 
a big deal though.

2. The standard indentation practice is to use 8-space tabs.

-Brian