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9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
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24 #include "main/imports.h"
25 #include "symbol_table.h"
26 #include "glsl_parser_extras.h"
28 #include "glsl_types.h"
32 _mesa_ast_field_selection_to_hir(const ast_expression
*expr
,
33 exec_list
*instructions
,
34 struct _mesa_glsl_parse_state
*state
)
36 ir_rvalue
*result
= NULL
;
39 op
= expr
->subexpressions
[0]->hir(instructions
, state
);
41 /* There are two kinds of field selection. There is the selection of a
42 * specific field from a structure, and there is the selection of a
43 * swizzle / mask from a vector. Which is which is determined entirely
44 * by the base type of the thing to which the field selection operator is
47 YYLTYPE loc
= expr
->get_location();
48 if (op
->type
->is_error()) {
49 /* silently propagate the error */
50 } else if (op
->type
->is_vector()) {
51 ir_swizzle
*swiz
= ir_swizzle::create(op
,
52 expr
->primary_expression
.identifier
,
53 op
->type
->vector_elements
);
57 /* FINISHME: Logging of error messages should be moved into
58 * FINISHME: ir_swizzle::create. This allows the generation of more
59 * FINISHME: specific error messages.
61 _mesa_glsl_error(& loc
, state
, "Invalid swizzle / mask `%s'",
62 expr
->primary_expression
.identifier
);
64 } else if (op
->type
->base_type
== GLSL_TYPE_STRUCT
) {
65 result
= new ir_dereference(op
, expr
->primary_expression
.identifier
);
67 if (result
->type
->is_error()) {
68 _mesa_glsl_error(& loc
, state
, "Cannot access field `%s' of "
70 expr
->primary_expression
.identifier
);
73 _mesa_glsl_error(& loc
, state
, "Cannot access field `%s' of "
74 "non-structure / non-vector.",
75 expr
->primary_expression
.identifier
);
78 return result
? result
: ir_call::get_error_instruction();