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nir/lower_tex: Add AYUV lowering support

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Byte ordering is :

0: V
1: U
2: Y
3: A

v2: Split refactoring of alpha channel (Lionel)

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Tapani Pälli <tapani.palli@intel.com> (v1)
Acked-by: Eric Engestrom <eric.engestrom@intel.com> (v2)
This commit is contained in:
Lionel Landwerlin
2018-11-08 16:28:20 +00:00
parent 0a30c33e83
commit 8a15f06d19
2 changed files with 20 additions and 0 deletions
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1
src/compiler/nir/nir.h
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@@ -2905,6 +2905,7 @@ typedef struct nir_lower_tex_options {
unsigned lower_y_u_v_external;
unsigned lower_yx_xuxv_external;
unsigned lower_xy_uxvx_external;
unsigned lower_ayuv_external;
/**
* To emulate certain texture wrap modes, this can be used

19
src/compiler/nir/nir_lower_tex.c
View File

@@ -348,6 +348,20 @@ lower_xy_uxvx_external(nir_builder *b, nir_tex_instr *tex)
nir_imm_float(b, 1.0f));
}
static void
lower_ayuv_external(nir_builder *b, nir_tex_instr *tex)
{
b->cursor = nir_after_instr(&tex->instr);
nir_ssa_def *ayuv = sample_plane(b, tex, 0);
convert_yuv_to_rgb(b, tex,
nir_channel(b, ayuv, 2),
nir_channel(b, ayuv, 1),
nir_channel(b, ayuv, 0),
nir_channel(b, ayuv, 3));
}
/*
* Emits a textureLod operation used to replace an existing
* textureGrad instruction.
@@ -793,6 +807,11 @@ nir_lower_tex_block(nir_block *block, nir_builder *b,
progress = true;
}
if ((1 << tex->texture_index) & options->lower_ayuv_external) {
lower_ayuv_external(b, tex);
progress = true;
}
if (sat_mask) {
saturate_src(b, tex, sat_mask);
progress = true;