*
* Sets the InputsRead and OutputsWritten of Mesa programs.
*
+ * Additionally, for fragment shaders, sets the InterpQualifier array and
+ * IsCentroid bitfield.
+ *
* Mesa programs (gl_program, not gl_shader_program) have a set of
* flags indicating which varyings are read and written. Computing
* which are actually read from some sort of backend code can be
class ir_set_program_inouts_visitor : public ir_hierarchical_visitor {
public:
- ir_set_program_inouts_visitor(struct gl_program *prog)
+ ir_set_program_inouts_visitor(struct gl_program *prog,
+ bool is_fragment_shader)
{
this->prog = prog;
+ this->is_fragment_shader = is_fragment_shader;
this->ht = hash_table_ctor(0,
hash_table_pointer_hash,
hash_table_pointer_compare);
struct gl_program *prog;
struct hash_table *ht;
+ bool is_fragment_shader;
};
static void
-mark(struct gl_program *prog, ir_variable *var, int offset, int len)
+mark(struct gl_program *prog, ir_variable *var, int offset, int len,
+ bool is_fragment_shader)
{
/* As of GLSL 1.20, varyings can only be floats, floating-point
* vectors or matrices, or arrays of them. For Mesa programs using
*/
for (int i = 0; i < len; i++) {
- if (var->mode == ir_var_in)
- prog->InputsRead |= BITFIELD64_BIT(var->location + offset + i);
- else if (var->mode == ir_var_system_value)
- prog->SystemValuesRead |= (1 << (var->location + offset + i));
- else
- prog->OutputsWritten |= BITFIELD64_BIT(var->location + offset + i);
+ GLbitfield64 bitfield = BITFIELD64_BIT(var->location + var->index + offset + i);
+ if (var->mode == ir_var_in) {
+ prog->InputsRead |= bitfield;
+ if (is_fragment_shader) {
+ gl_fragment_program *fprog = (gl_fragment_program *) prog;
+ fprog->InterpQualifier[var->location + var->index + offset + i] =
+ (glsl_interp_qualifier) var->interpolation;
+ if (var->centroid)
+ fprog->IsCentroid |= bitfield;
+ }
+ } else if (var->mode == ir_var_system_value) {
+ prog->SystemValuesRead |= bitfield;
+ } else {
+ prog->OutputsWritten |= bitfield;
+ }
}
}
if (ir->type->is_array()) {
mark(this->prog, ir->var, 0,
- ir->type->length * ir->type->fields.array->matrix_columns);
+ ir->type->length * ir->type->fields.array->matrix_columns,
+ this->is_fragment_shader);
} else {
- mark(this->prog, ir->var, 0, ir->type->matrix_columns);
+ mark(this->prog, ir->var, 0, ir->type->matrix_columns,
+ this->is_fragment_shader);
}
return visit_continue;
width = deref_var->type->fields.array->matrix_columns;
}
- mark(this->prog, var, index->value.i[0] * width, width);
+ mark(this->prog, var, index->value.i[0] * width, width,
+ this->is_fragment_shader);
return visit_continue_with_parent;
}
}
void
-do_set_program_inouts(exec_list *instructions, struct gl_program *prog)
+do_set_program_inouts(exec_list *instructions, struct gl_program *prog,
+ bool is_fragment_shader)
{
- ir_set_program_inouts_visitor v(prog);
+ ir_set_program_inouts_visitor v(prog, is_fragment_shader);
prog->InputsRead = 0;
prog->OutputsWritten = 0;
prog->SystemValuesRead = 0;
+ if (is_fragment_shader) {
+ memset(((gl_fragment_program *) prog)->InterpQualifier, 0,
+ sizeof(((gl_fragment_program *) prog)->InterpQualifier));
+ ((gl_fragment_program *) prog)->IsCentroid = 0;
+ }
visit_list_elements(&v, instructions);
}