[Mesa-dev] [PATCH v2 3/9] i915: Use L8A8 instead of I8 to simulate A8 on gen2

[Erik Faye-Lund]

On Fri, Aug 15, 2014 at 11:57 AM, Ville Syrjälä
<ville.syrjala at linux.intel.com> wrote:
> On Fri, Aug 15, 2014 at 10:52:50AM +0200, Erik Faye-Lund wrote:
>> On Thu, Aug 7, 2014 at 10:31 AM,  <ville.syrjala at linux.intel.com> wrote:
>> > diff --git a/src/mesa/main/texformat.c b/src/mesa/main/texformat.c
>> > index c61a748..f414ea3 100644
>> > --- a/src/mesa/main/texformat.c
>> > +++ b/src/mesa/main/texformat.c
>> >     case GL_ALPHA12:
>> >     case GL_ALPHA16:
>> >        RETURN_IF_SUPPORTED(MESA_FORMAT_A_UNORM16);
>> >        RETURN_IF_SUPPORTED(MESA_FORMAT_A_UNORM8);
>> > +      RETURN_IF_SUPPORTED(MESA_FORMAT_L8A8_UNORM);
>> >        break;
>>
>> I know this isn't exactly what your patch looked to support, but
>> shouldn't MESA_FORMAT_L16A16_UNORM be tried as a lossless alternative
>> also?
>
> I suppose, but I suspect you'll have a hard time finding hardware that
> supports L16A16 but not A16.

Fair point.