[Mesa-dev] [PATCH 2/5] mesa/main: Add generic bits of ARB_clear_texture implementation

[Marek Olšák]

The presence of EXT_texture_integer implies EXT_gpu_shader4, so I
added "ctx->Version >= 30 || ctx->Extensions.EXT_texture_integer"
everywhere to allow drivers to disable EXT_texture_integer but not
lose integer textures from GL 3.0.

Marek

On Mon, Jun 16, 2014 at 12:49 PM, Neil Roberts <neil at linux.intel.com> wrote:
> Ilia Mirkin <imirkin at alum.mit.edu> writes:
>
>>> +   if (ctx->Version >= 30 || ctx->Extensions.EXT_texture_integer) {
>>
>> Just ctx->Extensions.EXT_texture_integer should be enough here, no?
>
> I'm reluctant to change this because every other place in the code that
> checks for integer textures does it in the same way. Perhaps if we
> wanted to change it then we should do it in a separate patch and change
> it everywhere. I think it might theoretically make sense to expose GL 3
> without GL_EXT_texture_integer in some cases because the extension
> implies supporting luminance integer textures whereas GL 3 does not.
>
> This bit of code implies that Mesa treats the two types of support for
> integer textures distinctly:
>
> http://is.gd/HM3SIw
>
> Regards,
> - Neil
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