From ab336e8b46b6d7016519681c59b9aedf3fea04ad Mon Sep 17 00:00:00 2001 From: Ilia Mirkin Date: Sun, 19 Nov 2017 12:27:12 -0500 Subject: [PATCH] nir: allow texture offsets with cube maps 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 Reviewed-by: Jason Ekstrand Reviewed-by: Rob Clark --- 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 f46f614..cf200fd 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; } -- 2.7.4