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glsl: add helper to generate xfb varying names 

Reviewed-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Timothy Arceri 2016-02-24 15:40:31 +11:00
parent 8b6f8fe503
commit 707fd3972f
1 changed files with 43 additions and 0 deletions
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43
src/compiler/glsl/link_varyings.cpp
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@ -63,6 +63,49 @@ get_varying_type(const ir_variable *var, gl_shader_stage stage)
return type;
}
static void
create_xfb_varying_names(void *mem_ctx, const glsl_type *t, char **name,
size_t name_length, unsigned *count,
const char *ifc_member_name,
const glsl_type *ifc_member_t, char ***varying_names)
{
if (t->is_interface()) {
size_t new_length = name_length;
assert(ifc_member_name && ifc_member_t);
ralloc_asprintf_rewrite_tail(name, &new_length, ".%s", ifc_member_name);
create_xfb_varying_names(mem_ctx, ifc_member_t, name, new_length, count,
NULL, NULL, varying_names);
} else if (t->is_record()) {
for (unsigned i = 0; i < t->length; i++) {
const char *field = t->fields.structure[i].name;
size_t new_length = name_length;
ralloc_asprintf_rewrite_tail(name, &new_length, ".%s", field);
create_xfb_varying_names(mem_ctx, t->fields.structure[i].type, name,
new_length, count, NULL, NULL,
varying_names);
}
} else if (t->without_array()->is_record() ||
t->without_array()->is_interface() ||
(t->is_array() && t->fields.array->is_array())) {
for (unsigned i = 0; i < t->length; i++) {
size_t new_length = name_length;
/* Append the subscript to the current variable name */
ralloc_asprintf_rewrite_tail(name, &new_length, "[%u]", i);
create_xfb_varying_names(mem_ctx, t->fields.array, name, new_length,
count, ifc_member_name, ifc_member_t,
varying_names);
}
} else {
(*varying_names)[(*count)++] = ralloc_strdup(mem_ctx, *name);
}
}
/**
* Validate the types and qualifiers of an output from one stage against the
* matching input to another stage.