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spirv/nir: Add support for shadow samplers that return vec4

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While SPIR-V technically doesn't support "old style" shadow, the
shadow-compare gather instruction does return a vec4 so we need to be able
to set the old_style_shadow bit in NIR.

Signed-off-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Cc: "12.0" <mesa-dev@lists.freedesktop.org>
This commit is contained in:
Jason Ekstrand 2016-07-20 19:55:51 -07:00
parent 2ddefd03b7
commit 7c7acf53b2
1 changed files with 2 additions and 1 deletions
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src/compiler/spirv/spirv_to_nir.c
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@ -1479,7 +1479,8 @@ vtn_handle_texture(struct vtn_builder *b, SpvOp opcode,
instr->sampler_dim = glsl_get_sampler_dim(image_type);
instr->is_array = glsl_sampler_type_is_array(image_type);
instr->is_shadow = glsl_sampler_type_is_shadow(image_type);
instr->is_new_style_shadow = instr->is_shadow;
instr->is_new_style_shadow = instr->is_shadow &&
glsl_get_components(ret_type->type) == 1;
if (has_coord) {
switch (instr->sampler_dim) {