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mesa/st: support lowering multi-planar YUV

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Support multi-planar YUV for external EGLImage's (currently just in the
dma-buf import path) by lowering to multiple texture fetch's for each
plane and CSC in shader.

There was some discussion of alternative approaches for tracking the
additional UV or U/V planes:

  https://lists.freedesktop.org/archives/mesa-dev/2016-September/127832.html

They all seemed worse than pipe_resource::next

Signed-off-by: Rob Clark <robdclark@gmail.com>
This commit is contained in:
Rob Clark
2016-08-31 17:44:01 -04:00
parent e0ec1c3134
commit ecd6fce261
18 changed files with 359 additions and 27 deletions
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35
src/mesa/state_tracker/st_program.c
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@@ -53,6 +53,7 @@
#include "st_cb_bitmap.h"
#include "st_cb_drawpixels.h"
#include "st_context.h"
#include "st_tgsi_lower_yuv.h"
#include "st_program.h"
#include "st_mesa_to_tgsi.h"
#include "st_atifs_to_tgsi.h"
@@ -1024,8 +1025,23 @@ st_create_fp_variant(struct st_context *st,
NIR_PASS_V(tgsi.ir.nir, nir_lower_drawpixels, &options);
}
if (unlikely(key->external.lower_nv12 || key->external.lower_iyuv)) {
nir_lower_tex_options options = {0};
options.lower_y_uv_external = key->external.lower_nv12;
options.lower_y_u_v_external = key->external.lower_iyuv;
NIR_PASS_V(tgsi.ir.nir, nir_lower_tex, &options);
}
st_finalize_nir(st, &stfp->Base.Base, tgsi.ir.nir);
if (unlikely(key->external.lower_nv12 || key->external.lower_iyuv)) {
/* This pass needs to happen *after* nir_lower_sampler */
NIR_PASS_V(tgsi.ir.nir, st_nir_lower_tex_src_plane,
~stfp->Base.Base.SamplersUsed,
key->external.lower_nv12,
key->external.lower_iyuv);
}
variant->driver_shader = pipe->create_fs_state(pipe, &tgsi);
variant->key = *key;
@@ -1122,6 +1138,25 @@ st_create_fp_variant(struct st_context *st,
fprintf(stderr, "mesa: cannot create a shader for glDrawPixels\n");
}
if (unlikely(key->external.lower_nv12 || key->external.lower_iyuv)) {
const struct tgsi_token *tokens;
/* samplers inserted would conflict, but this should be unpossible: */
assert(!(key->bitmap || key->drawpixels));
tokens = st_tgsi_lower_yuv(tgsi.tokens,
~stfp->Base.Base.SamplersUsed,
key->external.lower_nv12,
key->external.lower_iyuv);
if (tokens) {
if (tgsi.tokens != stfp->tgsi.tokens)
tgsi_free_tokens(tgsi.tokens);
tgsi.tokens = tokens;
} else {
fprintf(stderr, "mesa: cannot create a shader for samplerExternalOES\n");
}
}
if (ST_DEBUG & DEBUG_TGSI) {
tgsi_dump(tgsi.tokens, 0);
debug_printf("\n");