[Mesa-stable] [Mesa-dev] [PATCH] nvc0: fix blitting red to srgb8_alpha

[Karol Herbst]

just asking, because your commit message more or less hinted towards
that being about r -> srgb conversions, but it makes sense that any
single component blits wouldn't work.

Reviewed-by: Karol Herbst <kherbst at redhat.com>

On Tue, Oct 9, 2018 at 1:03 PM Ilia Mirkin <imirkin at alum.mit.edu> wrote:
>
> Ones that blit to srgb, yes. Couldn't get those to work with the 2d engine.
>
> On Tue, Oct 9, 2018, 04:46 Karol Herbst <kherbst at redhat.com> wrote:
>>
>> but this movs all single color blits to the 3d blitter, right?
>> On Sun, Oct 7, 2018 at 11:50 PM Ilia Mirkin <imirkin at alum.mit.edu> wrote:
>> >
>> > For some reason the 2d engine can't handle this. Red formats get special
>> > treatment there, so perhaps related.
>> >
>> > Fixes dEQP-GLES3 tests of the form:
>> >
>> >   dEQP-GLES3.functional.fbo.blit.conversion.r{8,16f,32f}_to_srgb8_alpha8
>> >
>> > Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu>
>> > Cc: mesa-stable at lists.freedesktop.org
>> > ---
>> >  src/gallium/drivers/nouveau/nvc0/nvc0_surface.c | 4 ++++
>> >  1 file changed, 4 insertions(+)
>> >
>> > diff --git a/src/gallium/drivers/nouveau/nvc0/nvc0_surface.c b/src/gallium/drivers/nouveau/nvc0/nvc0_surface.c
>> > index 120f9fe6ab9..03881c62785 100644
>> > --- a/src/gallium/drivers/nouveau/nvc0/nvc0_surface.c
>> > +++ b/src/gallium/drivers/nouveau/nvc0/nvc0_surface.c
>> > @@ -1617,6 +1617,10 @@ nvc0_blit(struct pipe_context *pipe, const struct pipe_blit_info *info)
>> >              else
>> >              if (util_format_is_alpha(info->src.format))
>> >                 eng3d = info->src.format != PIPE_FORMAT_A8_UNORM;
>> > +            else
>> > +            if (util_format_is_srgb(info->dst.format) &&
>> > +                util_format_get_nr_components(info->src.format) == 1)
>> > +               eng3d = true;
>> >              else
>> >                 eng3d = !nv50_2d_format_supported(info->src.format);
>> >           }
>> > --
>> > 2.16.4
>> >
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