On 11 September 2015 at 19:07, Krzesimir Nowak <krzesi...@kinvolk.io> wrote:
> With that, sp_sampler_view instances are not abused anymore as a local
> storage, so we can later make them constant.
> ---
> src/gallium/drivers/softpipe/sp_tex_sample.c | 36
> +++++++++++++++++-----------
> src/gallium/drivers/softpipe/sp_tex_sample.h | 4 +---
> 2 files changed, 23 insertions(+), 17 deletions(-)
>
> diff --git a/src/gallium/drivers/softpipe/sp_tex_sample.c
> b/src/gallium/drivers/softpipe/sp_tex_sample.c
> index 489cae7..d5a7ed6 100644
> --- a/src/gallium/drivers/softpipe/sp_tex_sample.c
> +++ b/src/gallium/drivers/softpipe/sp_tex_sample.c
> @@ -3594,11 +3596,16 @@ sp_tgsi_get_samples(struct tgsi_sampler *tgsi_sampler,
> float cs[TGSI_QUAD_SIZE];
> float ct[TGSI_QUAD_SIZE];
> float cp[TGSI_QUAD_SIZE];
> + float faces[TGSI_QUAD_SIZE];
>
> - convert_cube(sp_sview, sp_samp, s, t, p, c0, cs, ct, cp);
> + convert_cube(sp_sview, sp_samp, s, t, p, c0, cs, ct, cp, faces);
>
> + filt_args.faces = faces;
If I remember it correctly the contents of faces will become invalid
and as we exit the function, thus any attempt to use them (via
filt_args.faces) and things will go crazy.
> sample_mip(sp_sview, sp_samp, cs, ct, cp, c0, lod, &filt_args, rgba);
> } else {
> + static const float zero_faces[TGSI_QUAD_SIZE] = {0.0f, 0.0f, 0.0f,
> 0.0f};
> +
> + filt_args.faces = zero_faces;
Here we should be safe due to the static qualifier.
> sample_mip(sp_sview, sp_samp, s, t, p, c0, lod, &filt_args, rgba);
> }
> }
> diff --git a/src/gallium/drivers/softpipe/sp_tex_sample.h
> b/src/gallium/drivers/softpipe/sp_tex_sample.h
> index 72b4a1a..6743b7e 100644
> --- a/src/gallium/drivers/softpipe/sp_tex_sample.h
> +++ b/src/gallium/drivers/softpipe/sp_tex_sample.h
> @@ -72,6 +72,7 @@ typedef void (*img_filter_func)(struct sp_sampler_view
> *sp_sview,
> struct filter_args {
> enum tgsi_sampler_control control;
> const int8_t *offset;
> + const float *faces;
Afaict during calculation of face (in convert_cube) uint type is used.
Won't this cause unnecessary int <> float conversions ?
Cheers,
Emil
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