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nir: Add a lowering pass for UYVY textures

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Similar with support for YUYV but with byte order difference in sampler

Reviewed-by: Kristian H. Kristensen <hoegsberg@google.com>
This commit is contained in:
Johnson Lin
2017-06-16 13:40:31 +08:00
committed by Lionel Landwerlin
parent 194205cd00
commit 8ff4be44b7
2 changed files with 19 additions and 0 deletions
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1
src/compiler/nir/nir.h
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@@ -2449,6 +2449,7 @@ typedef struct nir_lower_tex_options {
unsigned lower_y_uv_external;
unsigned lower_y_u_v_external;
unsigned lower_yx_xuxv_external;
unsigned lower_xy_uxvx_external;
/**
* To emulate certain texture wrap modes, this can be used

18
src/compiler/nir/nir_lower_tex.c
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@@ -301,6 +301,20 @@ lower_yx_xuxv_external(nir_builder *b, nir_tex_instr *tex)
nir_channel(b, xuxv, 3));
}
static void
lower_xy_uxvx_external(nir_builder *b, nir_tex_instr *tex)
{
b->cursor = nir_after_instr(&tex->instr);
nir_ssa_def *y = sample_plane(b, tex, 0);
nir_ssa_def *uxvx = sample_plane(b, tex, 1);
convert_yuv_to_rgb(b, tex,
nir_channel(b, y, 1),
nir_channel(b, uxvx, 0),
nir_channel(b, uxvx, 2));
}
/*
* Emits a textureLod operation used to replace an existing
* textureGrad instruction.
@@ -760,6 +774,10 @@ nir_lower_tex_block(nir_block *block, nir_builder *b,
progress = true;
}
if ((1 << tex->texture_index) & options->lower_xy_uxvx_external) {
lower_xy_uxvx_external(b, tex);
progress = true;
}
if (sat_mask) {
saturate_src(b, tex, sat_mask);