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vkd3d-shader/dxil: Parse the gather offset as an int2.

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Instead of an int3.

Gather operations expect an offset with only two components.
Currently the following field (which is the gather channel) is
parsed as a third component, which leads to wrong and invalid
results.

This fixes a crash on a shader from WRC Generations.
This commit is contained in:
Giovanni Mascellani
2025-11-11 14:28:19 +01:00
committed by Henri Verbeet
parent cb3367c66d
commit 065430547c
Notes: Henri Verbeet 2025-11-12 15:31:08 +01:00 
Approved-by: Francisco Casas (@fcasas)
Approved-by: Henri Verbeet (@hverbeet)
Merge-Request: https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/1822
1 changed files with 8 additions and 5 deletions
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13
libs/vkd3d-shader/dxil.c
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@@ -6142,11 +6142,14 @@ static unsigned int sm6_value_get_texel_offset(const struct sm6_value *value, st
}
static void instruction_set_texel_offset(struct vkd3d_shader_instruction *ins,
const struct sm6_value **operands, struct sm6_parser *sm6)
const struct sm6_value **operands, unsigned int count, struct sm6_parser *sm6)
{
ins->texel_offset.u = sm6_value_get_texel_offset(operands[0], sm6);
ins->texel_offset.v = sm6_value_get_texel_offset(operands[1], sm6);
ins->texel_offset.w = sm6_value_get_texel_offset(operands[2], sm6);
if (count == 3)
ins->texel_offset.w = sm6_value_get_texel_offset(operands[2], sm6);
else
ins->texel_offset.w = 0;
}
static void sm6_parser_emit_dx_sample(struct sm6_parser *sm6, enum dx_intrinsic_opcode op,
@@ -6228,7 +6231,7 @@ static void sm6_parser_emit_dx_sample(struct sm6_parser *sm6, enum dx_intrinsic_
src_param_init_vector_from_reg(&src_params[0], &coord);
src_param_init_vector_from_handle(sm6, &src_params[1], &resource->u.handle);
src_param_init_vector_from_handle(sm6, &src_params[2], &sampler->u.handle);
instruction_set_texel_offset(ins, &operands[6], sm6);
instruction_set_texel_offset(ins, &operands[6], 3, sm6);
instruction_dst_param_init_ssa_vector(ins, component_count, sm6);
}
@@ -6402,7 +6405,7 @@ static void sm6_parser_emit_dx_texture_gather(struct sm6_parser *sm6, enum dx_in
if (extended_offset)
src_param_init_vector_from_reg(&src_params[1], &offset);
else
instruction_set_texel_offset(ins, &operands[6], sm6);
instruction_set_texel_offset(ins, &operands[6], 2, sm6);
src_param_init_vector_from_handle(sm6, &src_params[1 + extended_offset], &resource->u.handle);
src_param_init_vector_from_handle(sm6, &src_params[2 + extended_offset], &sampler->u.handle);
/* Swizzle stored in the sampler parameter is the scalar component index to be gathered. */
@@ -6448,7 +6451,7 @@ static void sm6_parser_emit_dx_texture_load(struct sm6_parser *sm6, enum dx_intr
ins = state->ins;
instruction_init_with_resource(ins, is_uav ? VSIR_OP_LD_UAV_TYPED
: is_multisample ? VSIR_OP_LD2DMS : VSIR_OP_LD, resource, sm6);
instruction_set_texel_offset(ins, &operands[5], sm6);
instruction_set_texel_offset(ins, &operands[5], 3, sm6);
for (i = 0; i < VKD3D_VEC4_SIZE; ++i)
ins->resource_data_type[i] = resource->u.handle.d->resource_data_type;