[Mesa-stable] [Mesa-dev] [PATCH] Revert "mesa: do not trigger _NEW_TEXTURE_STATE in glActiveTexture()"

[Marek Olšák]

Sounds good to me.

Marek

On Wed, Mar 14, 2018 at 6:26 AM, Timothy Arceri <tarceri at itsqueeze.com>
wrote:

>
>
> On 14/03/18 19:46, Samuel Pitoiset wrote:
>
>> This reverts commit f314a532fdc7af8381586144d2631d9968331f05.
>>
>> This appears to introduce some blinking textures in UT2004. Not
>> sure exactly what's the root cause because we don't have much
>> information about the issue.
>>
>> Anyway, this was just a micro optimization that actually breaks,
>> at least, one app almost one year later.
>>
>> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=105436
>> Cc: <mesa-stable at lists.freedesktop.org>
>> Signed-off-by: Samuel Pitoiset <samuel.pitoiset at gmail.com>
>> ---
>>   src/mesa/main/texstate.c | 2 ++
>>   1 file changed, 2 insertions(+)
>>
>> diff --git a/src/mesa/main/texstate.c b/src/mesa/main/texstate.c
>> index f9f50a3005..f9b00b4a8f 100644
>> --- a/src/mesa/main/texstate.c
>> +++ b/src/mesa/main/texstate.c
>> @@ -310,6 +310,8 @@ active_texture(GLenum texture, bool no_error)
>>         }
>>      }
>>
>>
>
> Can we add a comment here so this doesn't happen again and anyone looking
> to remove it has a head start on the problem? Maybe something like:
>
>  /* The below flush call seems useless because
> gl_context::Texture::CurrentUnit is not used by
>   * _mesa_update_texture_state() and friends. However removing
>   * the flush introduced some blinking textures in UT2004.
>   * More investigation is needed to find the root cause.
>   *
>   * https://bugs.freedesktop.org/show_bug.cgi?id=105436
>   */
>
> With that:
>
> Reviewed-by: Timothy Arceri <tarceri at itsqueeze.com>
>
> +   FLUSH_VERTICES(ctx, _NEW_TEXTURE_STATE);
>> +
>>      ctx->Texture.CurrentUnit = texUnit;
>>      if (ctx->Transform.MatrixMode == GL_TEXTURE) {
>>         /* update current stack pointer */
>>
>> _______________________________________________
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