[Mesa-dev] [PATCH 14/33] intel/blorp: Add an entrypoint for doing bit-for-bit copies
Jason Ekstrand
jason at jlekstrand.net
Sat Sep 3 15:32:04 UTC 2016
On Sat, Sep 3, 2016 at 12:14 AM, Pohjolainen, Topi <
topi.pohjolainen at gmail.com> wrote:
> On Wed, Aug 31, 2016 at 02:22:33PM -0700, Jason Ekstrand wrote:
> > ---
> > src/intel/blorp/blorp.h | 10 ++++
> > src/intel/blorp/blorp_blit.c | 133 ++++++++++++++++++++++++++++++
> +++++++++++++
>
> So the idea is to copy a compression block as a pixel (by choosing large
> enough format), right? And this is only for compression schemes that do not
> use auxiliary buffers?
>
Yes. Particularly, it's for the sort of compressed formats that get
provided directly by users. It is also useful if you want to, for
instance, copy from RGBA8_UNORM to RG16_FLOAT bit-for-bit without doing any
conversion. In short, it's a memcpy() for image data. GL and Vulkan both
have such APIs: glCopyImageSubData and vkCopyImage.
> A few small comments further down.
>
> > 2 files changed, 143 insertions(+)
> >
> > diff --git a/src/intel/blorp/blorp.h b/src/intel/blorp/blorp.h
> > index c1e93fd..6574124 100644
> > --- a/src/intel/blorp/blorp.h
> > +++ b/src/intel/blorp/blorp.h
> > @@ -109,6 +109,16 @@ blorp_blit(struct blorp_batch *batch,
> > uint32_t filter, bool mirror_x, bool mirror_y);
> >
> > void
> > +blorp_copy(struct blorp_batch *batch,
> > + const struct blorp_surf *src_surf,
> > + unsigned src_level, unsigned src_layer,
> > + const struct blorp_surf *dst_surf,
> > + unsigned dst_level, unsigned dst_layer,
> > + uint32_t src_x, uint32_t src_y,
> > + uint32_t dst_x, uint32_t dst_y,
> > + uint32_t src_width, uint32_t src_height);
> > +
> > +void
> > blorp_fast_clear(struct blorp_batch *batch,
> > const struct blorp_surf *surf,
> > uint32_t level, uint32_t layer, enum isl_format format,
> > diff --git a/src/intel/blorp/blorp_blit.c b/src/intel/blorp/blorp_blit.c
> > index 3ab39a3..42a502c 100644
> > --- a/src/intel/blorp/blorp_blit.c
> > +++ b/src/intel/blorp/blorp_blit.c
> > @@ -1685,3 +1685,136 @@ blorp_blit(struct blorp_batch *batch,
> > dst_x0, dst_y0, dst_x1, dst_y1,
> > mirror_x, mirror_y);
> > }
> > +
> > +static enum isl_format
> > +get_copy_format_for_bpb(unsigned bpb)
> > +{
> > + /* The choice of UNORM and UINT formats is very intentional here.
> Most of
> > + * the time, we want to use a UINT format to avoid any rounding
> error in
> > + * the blit. For stencil blits, R8_UINT is required by the hardware.
> > + * (It's the only format allowed in conjunction with W-tiling.)
> Also we
> > + * intentionally use the 4-channel formats whenever we can. This is
> so
> > + * that, when we do a RGB <-> RGBX copy, the two formats will line
> up even
> > + * though one of them is 3/4 the size of the other. The choice of
> UNORM
> > + * vs. UINT is also very intentional because Haswell doesn't handle
> 8 or
> > + * 16-bit RGB UINT formats at all so we have to use UNORM there.
> > + * Fortunately, the only time we should ever use two different
> formats in
> > + * the table below is for RGB -> RGBA blits and so we will never
> have any
> > + * UNORM/UINT mismatch.
> > + */
> > + switch (bpb) {
> > + case 8: return ISL_FORMAT_R8_UINT;
> > + case 16: return ISL_FORMAT_R8G8_UINT;
> > + case 24: return ISL_FORMAT_R8G8B8_UNORM;
> > + case 32: return ISL_FORMAT_R8G8B8A8_UNORM;
> > + case 48: return ISL_FORMAT_R16G16B16_UNORM;
> > + case 64: return ISL_FORMAT_R16G16B16A16_UNORM;
> > + case 96: return ISL_FORMAT_R32G32B32_UINT;
> > + case 128:return ISL_FORMAT_R32G32B32A32_UINT;
> > + default:
> > + unreachable("Unknown format bpb");
> > + }
> > +}
> > +
> > +static void
> > +surf_convert_to_uncompressed(const struct isl_device *isl_dev,
> > + struct brw_blorp_surface_info *info,
> > + uint32_t *x, uint32_t *y,
> > + uint32_t *width, uint32_t *height)
> > +{
> > + const struct isl_format_layout *fmtl =
> > + isl_format_get_layout(info->surf.format);
> > +
> > + assert(fmtl->bw > 1 || fmtl->bh > 1);
> > +
> > + /* This is a compressed surface. We need to convert it to a single
> > + * slice (becase compressed layouts don't perfectly match
> uncompressed
>
> because
>
Yup
> > + * ones with the same bpb) and divide x, y, width, and height by the
> > + * block size.
> > + */
> > + surf_convert_to_single_slice(isl_dev, info);
> > +
> > + if (width || height) {
> > + assert(*width % fmtl->bw == 0 ||
> > + *x + *width == info->surf.logical_level0_px.width);
> > + assert(*height % fmtl->bh == 0 ||
> > + *y + *height == info->surf.logical_level0_px.height);
> > + *width = DIV_ROUND_UP(*width, fmtl->bw);
> > + *height = DIV_ROUND_UP(*height, fmtl->bh);
> > + }
> > +
> > + assert(*x % fmtl->bw == 0);
> > + assert(*y % fmtl->bh == 0);
> > + *x /= fmtl->bw;
> > + *y /= fmtl->bh;
> > +
> > + info->surf.logical_level0_px.width =
> > + DIV_ROUND_UP(info->surf.logical_level0_px.width, fmtl->bw);
> > + info->surf.logical_level0_px.height =
> > + DIV_ROUND_UP(info->surf.logical_level0_px.height, fmtl->bh);
> > +
> > + assert(info->surf.phys_level0_sa.width % fmtl->bw == 0);
> > + assert(info->surf.phys_level0_sa.height % fmtl->bh == 0);
> > + info->surf.phys_level0_sa.width /= fmtl->bw;
> > + info->surf.phys_level0_sa.height /= fmtl->bh;
> > +
> > + assert(info->tile_x_sa % fmtl->bw == 0);
> > + assert(info->tile_y_sa % fmtl->bh == 0);
> > + info->tile_x_sa /= fmtl->bw;
> > + info->tile_y_sa /= fmtl->bh;
> > +
> > + /* It's now an uncompressed surface so we need an uncompressed
> format */
> > + info->surf.format = get_copy_format_for_bpb(fmtl->bpb);
> > +}
> > +
> > +void
> > +blorp_copy(struct blorp_batch *batch,
> > + const struct blorp_surf *src_surf,
> > + unsigned src_level, unsigned src_layer,
> > + const struct blorp_surf *dst_surf,
> > + unsigned dst_level, unsigned dst_layer,
> > + uint32_t src_x, uint32_t src_y,
> > + uint32_t dst_x, uint32_t dst_y,
> > + uint32_t src_width, uint32_t src_height)
> > +{
> > + struct blorp_params params;
> > + blorp_params_init(¶ms);
> > +
> > + brw_blorp_surface_info_init(batch->blorp, ¶ms.src, src_surf,
> src_level,
> > + src_layer, ISL_FORMAT_UNSUPPORTED,
> false);
> > + brw_blorp_surface_info_init(batch->blorp, ¶ms.dst, dst_surf,
> dst_level,
> > + dst_layer, ISL_FORMAT_UNSUPPORTED, true);
> > +
> > + struct brw_blorp_blit_prog_key wm_prog_key;
> > + memset(&wm_prog_key, 0, sizeof(wm_prog_key));
> > +
> > + const struct isl_format_layout *src_fmtl =
> > + isl_format_get_layout(params.src.surf.format);
> > + const struct isl_format_layout *dst_fmtl =
> > + isl_format_get_layout(params.dst.surf.format);
> > +
> > + params.src.view.format = get_copy_format_for_bpb(src_fmtl->bpb);
> > + if (src_fmtl->bw > 1 || src_fmtl->bh > 1) {
> > + surf_convert_to_uncompressed(batch->blorp->isl_dev, ¶ms.src,
> > + &src_x, &src_y, &src_width,
> &src_height);
> > + wm_prog_key.need_dst_offset = true;
>
> I think you mean wm_prog_key.need_src_offset instead?
>
Drp... Thanks!
> > + }
> > +
> > + params.dst.view.format = get_copy_format_for_bpb(dst_fmtl->bpb);
> > + if (dst_fmtl->bw > 1 || dst_fmtl->bh > 1) {
> > + surf_convert_to_uncompressed(batch->blorp->isl_dev, ¶ms.dst,
> > + &dst_x, &dst_y, NULL, NULL);
> > + wm_prog_key.need_dst_offset = true;
> > + }
> > +
> > + /* Once both surfaces are stompped to uncompressed as needed, the
> > + * destination size is the same as the source size.
> > + */
> > + uint32_t dst_width = src_width;
> > + uint32_t dst_height = src_height;
> > +
> > + do_blorp_blit(batch, ¶ms, &wm_prog_key,
> > + src_x, src_y, src_x + src_width, src_y + src_height,
> > + dst_x, dst_y, dst_x + dst_width, dst_y + dst_height,
> > + false, false);
> > +}
> > --
> > 2.5.0.400.gff86faf
> >
> > _______________________________________________
> > mesa-dev mailing list
> > mesa-dev at lists.freedesktop.org
> > https://lists.freedesktop.org/mailman/listinfo/mesa-dev
>
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