[Mesa-dev] [PATCH v2] mesa: Allow override of GL version with environment variable

[Chad Versace]

On 09/26/2011 01:57 PM, Brian Paul wrote:
> On 09/26/2011 02:50 PM, Chad Versace wrote:
>> [idr and kwg, I see your point. I've removed the overrides for GLES1 and
>> GLES2.]
>>
>> It is necessary to manually set the GL version to 3.0 in order to run
>> Piglit tests using glGetUniform*().
>>
>> This patch allows one to override the version of the OpenGL context by
>> setting the environment variable MESA_GL_VERSION_OVERRIDE.
>>
>> v2
>> ---
>> - [brianp] Change variable name to MESA_GL_VERSION_OVERRIDE.
>> - [brianp] Document in envvars.html.
>> - [idr, kwg] Remove overrides for GLES1 and GLES2.
>>
>> Reviewed-by: Brian Paul<brianp at vmware.com>
>> Signed-off-by: Chad Versace<chad at chad-versace.us>
>> ---
>> docs/envvars.html | 2 ++
>> src/mesa/main/version.c | 24 ++++++++++++++++++++++++
>> 2 files changed, 26 insertions(+), 0 deletions(-)
>>
>> diff --git a/docs/envvars.html b/docs/envvars.html
>> index 986d2f8..7280f2b 100644
>> --- a/docs/envvars.html
>> +++ b/docs/envvars.html
>> @@ -58,6 +58,8 @@ copied into a fixed-size buffer without truncating.
>> If the extension string is too long, the buffer overrun can cause the game
>> to crash.
>> This is a work-around for that.
>> +<li>MESA_GL_VERSION_OVERRIDE - sets the GL version. For example, the value "3.0"
>> +will enable support for GL 3.0.
>
> The description is a little inaccurate. I'd say something like "setting this variable changes the value returned by glGetString(GL_VERSION). Mesa will not really implement all the features of the given version if it's higher than what's normally reported.
>
> -Brian

Ok. I'll change the description to what you suggested.

-- 
Chad Versace
chad at chad-versace.us