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glsl/linker: create a helper function to validate explicit locations

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Currently, we only validate explicit locations for non-SSO programs.
This creates a helper that we can call from both SSO and non-SSO paths
directly, so we can reuse all the logic behind this.

Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
This commit is contained in:
Iago Toral Quiroga
2017-10-20 09:00:41 +02:00
parent ab40acb453
commit e7b7fe314e
1 changed files with 55 additions and 39 deletions
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94
src/compiler/glsl/link_varyings.cpp
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@@ -533,6 +533,58 @@ check_location_aliasing(struct explicit_location_info explicit_locations[][4],
return true;
}
static bool
validate_explicit_variable_location(struct gl_context *ctx,
struct explicit_location_info explicit_locations[][4],
ir_variable *var,
gl_shader_program *prog,
gl_linked_shader *sh)
{
const glsl_type *type = get_varying_type(var, sh->Stage);
unsigned num_elements = type->count_attribute_slots(false);
unsigned idx = compute_variable_location_slot(var, sh->Stage);
unsigned slot_limit = idx + num_elements;
unsigned slot_max =
ctx->Const.Program[sh->Stage].MaxOutputComponents / 4;
if (slot_limit > slot_max) {
linker_error(prog,
"Invalid location %u in %s shader\n",
idx, _mesa_shader_stage_to_string(sh->Stage));
return false;
}
if (type->without_array()->is_interface()) {
for (unsigned i = 0; i < type->without_array()->length; i++) {
glsl_struct_field *field = &type->fields.structure[i];
unsigned field_location = field->location -
(field->patch ? VARYING_SLOT_PATCH0 : VARYING_SLOT_VAR0);
if (!check_location_aliasing(explicit_locations, var,
field_location,
0, field_location + 1,
field->type,
field->interpolation,
field->centroid,
field->sample,
field->patch,
prog, sh->Stage)) {
return false;
}
}
} else if (!check_location_aliasing(explicit_locations, var,
idx, var->data.location_frac,
slot_limit, type,
var->data.interpolation,
var->data.centroid,
var->data.sample,
var->data.patch,
prog, sh->Stage)) {
return false;
}
return true;
}
/**
* Validate that outputs from one stage match inputs of another
*/
@@ -560,45 +612,9 @@ cross_validate_outputs_to_inputs(struct gl_context *ctx,
/* User-defined varyings with explicit locations are handled
* differently because they do not need to have matching names.
*/
const glsl_type *type = get_varying_type(var, producer->Stage);
unsigned num_elements = type->count_attribute_slots(false);
unsigned idx = compute_variable_location_slot(var, producer->Stage);
unsigned slot_limit = idx + num_elements;
unsigned slot_max =
ctx->Const.Program[producer->Stage].MaxOutputComponents / 4;
if (slot_limit > slot_max) {
linker_error(prog,
"Invalid location %u in %s shader\n",
idx, _mesa_shader_stage_to_string(producer->Stage));
return;
}
if (type->without_array()->is_interface()) {
for (unsigned i = 0; i < type->without_array()->length; i++) {
glsl_struct_field *field = &type->fields.structure[i];
unsigned field_location = field->location -
(field->patch ? VARYING_SLOT_PATCH0 : VARYING_SLOT_VAR0);
if (!check_location_aliasing(explicit_locations, var,
field_location,
0, field_location + 1,
field->type,
field->interpolation,
field->centroid,
field->sample,
field->patch,
prog, producer->Stage)) {
return;
}
}
} else if (!check_location_aliasing(explicit_locations, var,
idx, var->data.location_frac,
slot_limit, type,
var->data.interpolation,
var->data.centroid,
var->data.sample,
var->data.patch,
prog, producer->Stage)) {
if (!validate_explicit_variable_location(ctx,
explicit_locations,
var, prog, producer)) {
return;
}
}