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25 #include "glsl_parser_extras.h"
27 #include "compiler/glsl_types.h"
30 _mesa_ast_field_selection_to_hir(const ast_expression
*expr
,
31 exec_list
*instructions
,
32 struct _mesa_glsl_parse_state
*state
)
35 ir_rvalue
*result
= NULL
;
38 op
= expr
->subexpressions
[0]->hir(instructions
, state
);
40 /* There are two kinds of field selection. There is the selection of a
41 * specific field from a structure, and there is the selection of a
42 * swizzle / mask from a vector. Which is which is determined entirely
43 * by the base type of the thing to which the field selection operator is
46 YYLTYPE loc
= expr
->get_location();
47 if (op
->type
->is_error()) {
48 /* silently propagate the error */
49 } else if (op
->type
->is_struct() || op
->type
->is_interface()) {
50 result
= new(ctx
) ir_dereference_record(op
,
51 expr
->primary_expression
.identifier
);
53 if (result
->type
->is_error()) {
54 _mesa_glsl_error(& loc
, state
, "cannot access field `%s' of "
56 expr
->primary_expression
.identifier
);
58 } else if (op
->type
->is_vector() ||
59 (state
->has_420pack() && op
->type
->is_scalar())) {
60 ir_swizzle
*swiz
= ir_swizzle::create(op
,
61 expr
->primary_expression
.identifier
,
62 op
->type
->vector_elements
);
66 /* FINISHME: Logging of error messages should be moved into
67 * FINISHME: ir_swizzle::create. This allows the generation of more
68 * FINISHME: specific error messages.
70 _mesa_glsl_error(& loc
, state
, "invalid swizzle / mask `%s'",
71 expr
->primary_expression
.identifier
);
74 _mesa_glsl_error(& loc
, state
, "cannot access field `%s' of "
75 "non-structure / non-vector",
76 expr
->primary_expression
.identifier
);
79 return result
? result
: ir_rvalue::error_value(ctx
);