GL doesn't have this, but some hardware supports it. This is convenient
for lowering tg4 to plain texture calls, which is necessary on Adreno
A4xx hardware.
Signed-off-by: Ilia Mirkin <imir...@alum.mit.edu>
Reviewed-by: Jason Ekstrand <ja...@jlekstrand.net>
---
v1 -> v2: shuffled code around to use an if ladder
src/compiler/nir/nir.h | 15 +++++++++++++--
1 file changed, 13 insertions(+), 2 deletions(-)
diff --git a/src/compiler/nir/nir.h b/src/compiler/nir/nir.h
index f46f6147110..cf200fdc665 100644
--- a/src/compiler/nir/nir.h
+++ b/src/compiler/nir/nir.h
@@ -1364,8 +1364,7 @@ nir_tex_instr_src_size(const nir_tex_instr *instr,
unsigned src)
if (instr->src[src].src_type == nir_tex_src_ms_mcs)
return 4;
- if (instr->src[src].src_type == nir_tex_src_offset ||
- instr->src[src].src_type == nir_tex_src_ddx ||
+ if (instr->src[src].src_type == nir_tex_src_ddx ||
instr->src[src].src_type == nir_tex_src_ddy) {
if (instr->is_array)
return instr->coord_components - 1;
@@ -1373,6 +1372,18 @@ nir_tex_instr_src_size(const nir_tex_instr *instr,
unsigned src)
return instr->coord_components;
}
+ /* Usual APIs don't allow cube + offset, but we allow it, with 2 coords for
+ * the offset, since a cube maps to a single face.
+ */
+ if (instr->src[src].src_type == nir_tex_src_offset) {
+ if (instr->sampler_dim == GLSL_SAMPLER_DIM_CUBE)
+ return 2;
+ else if (instr->is_array)
+ return instr->coord_components - 1;
+ else
+ return instr->coord_components;
+ }
+
return 1;
}
--
2.13.6
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