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[mesa.git] / src / mesa / slang / slang_compile.c
1 /*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 2005-2006 Brian Paul All Rights Reserved.
5 * Copyright (C) 2008 VMware, Inc. All Rights Reserved.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25 /**
26 * \file slang_compile.c
27 * slang front-end compiler
28 * \author Michal Krol
29 */
30
31 #include "main/imports.h"
32 #include "main/context.h"
33 #include "program/program.h"
34 #include "program/programopt.h"
35 #include "program/prog_optimize.h"
36 #include "program/prog_print.h"
37 #include "program/prog_parameter.h"
38 #include "../../glsl/pp/sl_pp_public.h"
39 #include "../../glsl/cl/sl_cl_parse.h"
40 #include "slang_codegen.h"
41 #include "slang_compile.h"
42 #include "slang_storage.h"
43 #include "slang_log.h"
44 #include "slang_mem.h"
45 #include "slang_vartable.h"
46 #include "slang_simplify.h"
47
48 /*
49 * This is a straightforward implementation of the slang front-end
50 * compiler. Lots of error-checking functionality is missing but
51 * every well-formed shader source should compile successfully and
52 * execute as expected. However, some semantically ill-formed shaders
53 * may be accepted resulting in undefined behaviour.
54 */
55
56
57 /** re-defined below, should be the same though */
58 #define TYPE_SPECIFIER_COUNT 36
59
60
61 /**
62 * Check if the given identifier is legal.
63 */
64 static GLboolean
65 legal_identifier(slang_atom name)
66 {
67 /* "gl_" is a reserved prefix */
68 if (strncmp((char *) name, "gl_", 3) == 0) {
69 return GL_FALSE;
70 }
71 return GL_TRUE;
72 }
73
74
75 /*
76 * slang_code_unit
77 */
78
79 GLvoid
80 _slang_code_unit_ctr(slang_code_unit * self,
81 struct slang_code_object_ * object)
82 {
83 _slang_variable_scope_ctr(&self->vars);
84 _slang_function_scope_ctr(&self->funs);
85 _slang_struct_scope_ctr(&self->structs);
86 self->object = object;
87 }
88
89 GLvoid
90 _slang_code_unit_dtr(slang_code_unit * self)
91 {
92 slang_variable_scope_destruct(&self->vars);
93 slang_function_scope_destruct(&self->funs);
94 slang_struct_scope_destruct(&self->structs);
95 }
96
97 /*
98 * slang_code_object
99 */
100
101 GLvoid
102 _slang_code_object_ctr(slang_code_object * self)
103 {
104 GLuint i;
105
106 for (i = 0; i < SLANG_BUILTIN_TOTAL; i++)
107 _slang_code_unit_ctr(&self->builtin[i], self);
108 _slang_code_unit_ctr(&self->unit, self);
109 slang_atom_pool_construct(&self->atompool);
110 }
111
112 GLvoid
113 _slang_code_object_dtr(slang_code_object * self)
114 {
115 GLuint i;
116
117 for (i = 0; i < SLANG_BUILTIN_TOTAL; i++)
118 _slang_code_unit_dtr(&self->builtin[i]);
119 _slang_code_unit_dtr(&self->unit);
120 slang_atom_pool_destruct(&self->atompool);
121 }
122
123
124 /* slang_parse_ctx */
125
126 typedef struct slang_parse_ctx_
127 {
128 const unsigned char *I;
129 slang_info_log *L;
130 int parsing_builtin;
131 GLboolean global_scope; /**< Is object being declared a global? */
132 slang_atom_pool *atoms;
133 slang_unit_type type; /**< Vertex vs. Fragment */
134 GLuint version; /**< user-specified (or default) #version */
135 } slang_parse_ctx;
136
137 /* slang_output_ctx */
138
139 typedef struct slang_output_ctx_
140 {
141 slang_variable_scope *vars;
142 slang_function_scope *funs;
143 slang_struct_scope *structs;
144 struct gl_program *program;
145 struct gl_sl_pragmas *pragmas;
146 slang_var_table *vartable;
147 GLuint default_precision[TYPE_SPECIFIER_COUNT];
148 GLboolean allow_precision;
149 GLboolean allow_invariant;
150 GLboolean allow_centroid;
151 GLboolean allow_array_types; /* float[] syntax */
152 } slang_output_ctx;
153
154 /* _slang_compile() */
155
156
157 /* Debugging aid, print file/line where parsing error is detected */
158 #define RETURN0 \
159 do { \
160 if (0) \
161 printf("slang error at %s:%d\n", __FILE__, __LINE__); \
162 return 0; \
163 } while (0)
164
165
166 static void
167 parse_identifier_str(slang_parse_ctx * C, char **id)
168 {
169 *id = (char *) C->I;
170 C->I += strlen(*id) + 1;
171 }
172
173 static slang_atom
174 parse_identifier(slang_parse_ctx * C)
175 {
176 const char *id;
177
178 id = (const char *) C->I;
179 C->I += strlen(id) + 1;
180 return slang_atom_pool_atom(C->atoms, id);
181 }
182
183 static int
184 is_hex_digit(char c)
185 {
186 return (c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F');
187 }
188
189 static int
190 parse_general_number(slang_parse_ctx *ctx, float *number)
191 {
192 char *flt = NULL;
193
194 if (*ctx->I == '0') {
195 int value = 0;
196 const unsigned char *pi;
197
198 if (ctx->I[1] == 'x' || ctx->I[1] == 'X') {
199 ctx->I += 2;
200 if (!is_hex_digit(*ctx->I)) {
201 return 0;
202 }
203 do {
204 int digit;
205
206 if (*ctx->I >= '0' && *ctx->I <= '9') {
207 digit = (int)(*ctx->I - '0');
208 } else if (*ctx->I >= 'a' && *ctx->I <= 'f') {
209 digit = (int)(*ctx->I - 'a') + 10;
210 } else {
211 digit = (int)(*ctx->I - 'A') + 10;
212 }
213 value = value * 0x10 + digit;
214 ctx->I++;
215 } while (is_hex_digit(*ctx->I));
216 if (*ctx->I != '\0') {
217 return 0;
218 }
219 ctx->I++;
220 *number = (float)value;
221 return 1;
222 }
223
224 pi = ctx->I;
225 pi++;
226 while (*pi >= '0' && *pi <= '7') {
227 int digit;
228
229 digit = (int)(*pi - '0');
230 value = value * 010 + digit;
231 pi++;
232 }
233 if (*pi == '\0') {
234 pi++;
235 ctx->I = pi;
236 *number = (float)value;
237 return 1;
238 }
239 }
240
241 parse_identifier_str(ctx, &flt);
242 flt = _mesa_strdup(flt);
243 if (!flt) {
244 return 0;
245 }
246 if (flt[strlen(flt) - 1] == 'f' || flt[strlen(flt) - 1] == 'F') {
247 flt[strlen(flt) - 1] = '\0';
248 }
249 *number = _mesa_strtof(flt, (char **)NULL);
250 free(flt);
251
252 return 1;
253 }
254
255 static int
256 parse_number(slang_parse_ctx * C, int *number)
257 {
258 const int radix = (int) (*C->I++);
259
260 if (radix == 1) {
261 float f = 0.0f;
262
263 parse_general_number(C, &f);
264 *number = (int)f;
265 } else {
266 *number = 0;
267 while (*C->I != '\0') {
268 int digit;
269 if (*C->I >= '0' && *C->I <= '9')
270 digit = (int) (*C->I - '0');
271 else if (*C->I >= 'A' && *C->I <= 'Z')
272 digit = (int) (*C->I - 'A') + 10;
273 else
274 digit = (int) (*C->I - 'a') + 10;
275 *number = *number * radix + digit;
276 C->I++;
277 }
278 C->I++;
279 }
280 if (*number > 65535)
281 slang_info_log_warning(C->L, "%d: literal integer overflow.", *number);
282 return 1;
283 }
284
285 static int
286 parse_float(slang_parse_ctx * C, float *number)
287 {
288 if (*C->I == 1) {
289 C->I++;
290 parse_general_number(C, number);
291 } else {
292 char *integral = NULL;
293 char *fractional = NULL;
294 char *exponent = NULL;
295 char *whole = NULL;
296
297 parse_identifier_str(C, &integral);
298 parse_identifier_str(C, &fractional);
299 parse_identifier_str(C, &exponent);
300
301 whole = (char *) _slang_alloc((strlen(integral) +
302 strlen(fractional) +
303 strlen(exponent) + 3) * sizeof(char));
304 if (whole == NULL) {
305 slang_info_log_memory(C->L);
306 RETURN0;
307 }
308
309 slang_string_copy(whole, integral);
310 slang_string_concat(whole, ".");
311 slang_string_concat(whole, fractional);
312 slang_string_concat(whole, "E");
313 slang_string_concat(whole, exponent);
314
315 *number = _mesa_strtof(whole, (char **) NULL);
316
317 _slang_free(whole);
318 }
319
320 return 1;
321 }
322
323 /* revision number - increment after each change affecting emitted output */
324 #define REVISION 5
325
326 static int
327 check_revision(slang_parse_ctx * C)
328 {
329 if (*C->I != REVISION) {
330 slang_info_log_error(C->L, "Internal compiler error.");
331 RETURN0;
332 }
333 C->I++;
334 return 1;
335 }
336
337 static int parse_statement(slang_parse_ctx *, slang_output_ctx *,
338 slang_operation *);
339 static int parse_expression(slang_parse_ctx *, slang_output_ctx *,
340 slang_operation *);
341 static int parse_type_specifier(slang_parse_ctx *, slang_output_ctx *,
342 slang_type_specifier *);
343 static int
344 parse_type_array_size(slang_parse_ctx *C,
345 slang_output_ctx *O,
346 GLint *array_len);
347
348 static GLboolean
349 parse_array_len(slang_parse_ctx * C, slang_output_ctx * O, GLuint * len)
350 {
351 slang_operation array_size;
352 slang_name_space space;
353 GLboolean result;
354
355 if (!slang_operation_construct(&array_size))
356 return GL_FALSE;
357 if (!parse_expression(C, O, &array_size)) {
358 slang_operation_destruct(&array_size);
359 return GL_FALSE;
360 }
361
362 space.funcs = O->funs;
363 space.structs = O->structs;
364 space.vars = O->vars;
365
366 /* evaluate compile-time expression which is array size */
367 _slang_simplify(&array_size, &space, C->atoms);
368
369 if (array_size.type == SLANG_OPER_LITERAL_INT) {
370 result = GL_TRUE;
371 *len = (GLint) array_size.literal[0];
372 } else if (array_size.type == SLANG_OPER_IDENTIFIER) {
373 slang_variable *var = _slang_variable_locate(array_size.locals, array_size.a_id, GL_TRUE);
374 if (!var) {
375 slang_info_log_error(C->L, "undefined variable '%s'",
376 (char *) array_size.a_id);
377 result = GL_FALSE;
378 } else if (var->type.qualifier == SLANG_QUAL_CONST &&
379 var->type.specifier.type == SLANG_SPEC_INT) {
380 if (var->initializer &&
381 var->initializer->type == SLANG_OPER_LITERAL_INT) {
382 *len = (GLint) var->initializer->literal[0];
383 result = GL_TRUE;
384 } else {
385 slang_info_log_error(C->L, "unable to parse array size declaration");
386 result = GL_FALSE;
387 }
388 } else {
389 slang_info_log_error(C->L, "unable to parse array size declaration");
390 result = GL_FALSE;
391 }
392 } else {
393 result = GL_FALSE;
394 }
395
396 slang_operation_destruct(&array_size);
397 return result;
398 }
399
400 static GLboolean
401 calculate_var_size(slang_parse_ctx * C, slang_output_ctx * O,
402 slang_variable * var)
403 {
404 slang_storage_aggregate agg;
405
406 if (!slang_storage_aggregate_construct(&agg))
407 return GL_FALSE;
408 if (!_slang_aggregate_variable(&agg, &var->type.specifier, var->array_len,
409 O->funs, O->structs, O->vars, C->atoms)) {
410 slang_storage_aggregate_destruct(&agg);
411 return GL_FALSE;
412 }
413 var->size = _slang_sizeof_aggregate(&agg);
414 slang_storage_aggregate_destruct(&agg);
415 return GL_TRUE;
416 }
417
418 static void
419 promote_type_to_array(slang_parse_ctx *C,
420 slang_fully_specified_type *type,
421 GLint array_len)
422 {
423 slang_type_specifier *baseType =
424 slang_type_specifier_new(type->specifier.type, NULL, NULL);
425
426 type->specifier.type = SLANG_SPEC_ARRAY;
427 type->specifier._array = baseType;
428 type->array_len = array_len;
429 }
430
431
432 static GLboolean
433 convert_to_array(slang_parse_ctx * C, slang_variable * var,
434 const slang_type_specifier * sp)
435 {
436 /* sized array - mark it as array, copy the specifier to the array element
437 * and parse the expression */
438 var->type.specifier.type = SLANG_SPEC_ARRAY;
439 var->type.specifier._array = (slang_type_specifier *)
440 _slang_alloc(sizeof(slang_type_specifier));
441 if (var->type.specifier._array == NULL) {
442 slang_info_log_memory(C->L);
443 return GL_FALSE;
444 }
445 slang_type_specifier_ctr(var->type.specifier._array);
446 return slang_type_specifier_copy(var->type.specifier._array, sp);
447 }
448
449 /* structure field */
450 #define FIELD_NONE 0
451 #define FIELD_NEXT 1
452 #define FIELD_ARRAY 2
453
454 static GLboolean
455 parse_struct_field_var(slang_parse_ctx * C, slang_output_ctx * O,
456 slang_variable * var, slang_atom a_name,
457 const slang_type_specifier * sp,
458 GLuint array_len)
459 {
460 var->a_name = a_name;
461 if (var->a_name == SLANG_ATOM_NULL)
462 return GL_FALSE;
463
464 switch (*C->I++) {
465 case FIELD_NONE:
466 if (array_len != -1) {
467 if (!convert_to_array(C, var, sp))
468 return GL_FALSE;
469 var->array_len = array_len;
470 }
471 else {
472 if (!slang_type_specifier_copy(&var->type.specifier, sp))
473 return GL_FALSE;
474 }
475 break;
476 case FIELD_ARRAY:
477 if (array_len != -1)
478 return GL_FALSE;
479 if (!convert_to_array(C, var, sp))
480 return GL_FALSE;
481 if (!parse_array_len(C, O, &var->array_len))
482 return GL_FALSE;
483 break;
484 default:
485 return GL_FALSE;
486 }
487
488 return calculate_var_size(C, O, var);
489 }
490
491 static int
492 parse_struct_field(slang_parse_ctx * C, slang_output_ctx * O,
493 slang_struct * st, slang_type_specifier * sp)
494 {
495 slang_output_ctx o = *O;
496 GLint array_len;
497
498 o.structs = st->structs;
499 if (!parse_type_specifier(C, &o, sp))
500 RETURN0;
501 if (!parse_type_array_size(C, &o, &array_len))
502 RETURN0;
503
504 do {
505 slang_atom a_name;
506 slang_variable *var = slang_variable_scope_grow(st->fields);
507 if (!var) {
508 slang_info_log_memory(C->L);
509 RETURN0;
510 }
511 a_name = parse_identifier(C);
512 if (_slang_variable_locate(st->fields, a_name, GL_FALSE)) {
513 slang_info_log_error(C->L, "duplicate field '%s'", (char *) a_name);
514 RETURN0;
515 }
516
517 if (!parse_struct_field_var(C, &o, var, a_name, sp, array_len))
518 RETURN0;
519 }
520 while (*C->I++ != FIELD_NONE);
521
522 return 1;
523 }
524
525 static int
526 parse_struct(slang_parse_ctx * C, slang_output_ctx * O, slang_struct ** st)
527 {
528 slang_atom a_name;
529 const char *name;
530
531 /* parse struct name (if any) and make sure it is unique in current scope */
532 a_name = parse_identifier(C);
533 if (a_name == SLANG_ATOM_NULL)
534 RETURN0;
535
536 name = slang_atom_pool_id(C->atoms, a_name);
537 if (name[0] != '\0'
538 && slang_struct_scope_find(O->structs, a_name, 0) != NULL) {
539 slang_info_log_error(C->L, "%s: duplicate type name.", name);
540 RETURN0;
541 }
542
543 /* set-up a new struct */
544 *st = (slang_struct *) _slang_alloc(sizeof(slang_struct));
545 if (*st == NULL) {
546 slang_info_log_memory(C->L);
547 RETURN0;
548 }
549 if (!slang_struct_construct(*st)) {
550 _slang_free(*st);
551 *st = NULL;
552 slang_info_log_memory(C->L);
553 RETURN0;
554 }
555 (**st).a_name = a_name;
556 (**st).structs->outer_scope = O->structs;
557
558 /* parse individual struct fields */
559 do {
560 slang_type_specifier sp;
561
562 slang_type_specifier_ctr(&sp);
563 if (!parse_struct_field(C, O, *st, &sp)) {
564 slang_type_specifier_dtr(&sp);
565 RETURN0;
566 }
567 slang_type_specifier_dtr(&sp);
568 }
569 while (*C->I++ != FIELD_NONE);
570
571 /* if named struct, copy it to current scope */
572 if (name[0] != '\0') {
573 slang_struct *s;
574
575 O->structs->structs =
576 (slang_struct *) _slang_realloc(O->structs->structs,
577 O->structs->num_structs
578 * sizeof(slang_struct),
579 (O->structs->num_structs + 1)
580 * sizeof(slang_struct));
581 if (O->structs->structs == NULL) {
582 slang_info_log_memory(C->L);
583 RETURN0;
584 }
585 s = &O->structs->structs[O->structs->num_structs];
586 if (!slang_struct_construct(s))
587 RETURN0;
588 O->structs->num_structs++;
589 if (!slang_struct_copy(s, *st))
590 RETURN0;
591 }
592
593 return 1;
594 }
595
596
597 /* invariant qualifer */
598 #define TYPE_VARIANT 90
599 #define TYPE_INVARIANT 91
600
601 static int
602 parse_type_variant(slang_parse_ctx * C, slang_type_variant *variant)
603 {
604 GLuint invariant = *C->I++;
605 switch (invariant) {
606 case TYPE_VARIANT:
607 *variant = SLANG_VARIANT;
608 return 1;
609 case TYPE_INVARIANT:
610 *variant = SLANG_INVARIANT;
611 return 1;
612 default:
613 RETURN0;
614 }
615 }
616
617
618 /* centroid qualifer */
619 #define TYPE_CENTER 95
620 #define TYPE_CENTROID 96
621
622 static int
623 parse_type_centroid(slang_parse_ctx * C, slang_type_centroid *centroid)
624 {
625 GLuint c = *C->I++;
626 switch (c) {
627 case TYPE_CENTER:
628 *centroid = SLANG_CENTER;
629 return 1;
630 case TYPE_CENTROID:
631 *centroid = SLANG_CENTROID;
632 return 1;
633 default:
634 RETURN0;
635 }
636 }
637
638
639 /* Layout qualifiers */
640 #define LAYOUT_QUALIFIER_NONE 0
641 #define LAYOUT_QUALIFIER_UPPER_LEFT 1
642 #define LAYOUT_QUALIFIER_PIXEL_CENTER_INTEGER 2
643
644 static int
645 parse_layout_qualifiers(slang_parse_ctx * C, slang_layout_qualifier *layout)
646 {
647 *layout = 0x0;
648
649 /* the layout qualifiers come as a list of LAYOUT_QUALIFER_x tokens,
650 * terminated by LAYOUT_QUALIFIER_NONE.
651 */
652 while (1) {
653 GLuint c = *C->I++;
654 switch (c) {
655 case LAYOUT_QUALIFIER_NONE:
656 /* end of list of qualifiers */
657 return 1;
658 case LAYOUT_QUALIFIER_UPPER_LEFT:
659 *layout |= SLANG_LAYOUT_UPPER_LEFT_BIT;
660 break;
661 case LAYOUT_QUALIFIER_PIXEL_CENTER_INTEGER:
662 *layout |= SLANG_LAYOUT_PIXEL_CENTER_INTEGER_BIT;
663 break;
664 default:
665 assert(0 && "Bad layout qualifier");
666 }
667 }
668 }
669
670
671 /* type qualifier */
672 #define TYPE_QUALIFIER_NONE 0
673 #define TYPE_QUALIFIER_CONST 1
674 #define TYPE_QUALIFIER_ATTRIBUTE 2
675 #define TYPE_QUALIFIER_VARYING 3
676 #define TYPE_QUALIFIER_UNIFORM 4
677 #define TYPE_QUALIFIER_FIXEDOUTPUT 5
678 #define TYPE_QUALIFIER_FIXEDINPUT 6
679
680 static int
681 parse_type_qualifier(slang_parse_ctx * C, slang_type_qualifier * qual)
682 {
683 GLuint qualifier = *C->I++;
684 switch (qualifier) {
685 case TYPE_QUALIFIER_NONE:
686 *qual = SLANG_QUAL_NONE;
687 break;
688 case TYPE_QUALIFIER_CONST:
689 *qual = SLANG_QUAL_CONST;
690 break;
691 case TYPE_QUALIFIER_ATTRIBUTE:
692 *qual = SLANG_QUAL_ATTRIBUTE;
693 break;
694 case TYPE_QUALIFIER_VARYING:
695 *qual = SLANG_QUAL_VARYING;
696 break;
697 case TYPE_QUALIFIER_UNIFORM:
698 *qual = SLANG_QUAL_UNIFORM;
699 break;
700 case TYPE_QUALIFIER_FIXEDOUTPUT:
701 *qual = SLANG_QUAL_FIXEDOUTPUT;
702 break;
703 case TYPE_QUALIFIER_FIXEDINPUT:
704 *qual = SLANG_QUAL_FIXEDINPUT;
705 break;
706 default:
707 RETURN0;
708 }
709 return 1;
710 }
711
712 /* type specifier */
713 #define TYPE_SPECIFIER_VOID 0
714 #define TYPE_SPECIFIER_BOOL 1
715 #define TYPE_SPECIFIER_BVEC2 2
716 #define TYPE_SPECIFIER_BVEC3 3
717 #define TYPE_SPECIFIER_BVEC4 4
718 #define TYPE_SPECIFIER_INT 5
719 #define TYPE_SPECIFIER_IVEC2 6
720 #define TYPE_SPECIFIER_IVEC3 7
721 #define TYPE_SPECIFIER_IVEC4 8
722 #define TYPE_SPECIFIER_FLOAT 9
723 #define TYPE_SPECIFIER_VEC2 10
724 #define TYPE_SPECIFIER_VEC3 11
725 #define TYPE_SPECIFIER_VEC4 12
726 #define TYPE_SPECIFIER_MAT2 13
727 #define TYPE_SPECIFIER_MAT3 14
728 #define TYPE_SPECIFIER_MAT4 15
729 #define TYPE_SPECIFIER_SAMPLER1D 16
730 #define TYPE_SPECIFIER_SAMPLER2D 17
731 #define TYPE_SPECIFIER_SAMPLER3D 18
732 #define TYPE_SPECIFIER_SAMPLERCUBE 19
733 #define TYPE_SPECIFIER_SAMPLER1DSHADOW 20
734 #define TYPE_SPECIFIER_SAMPLER2DSHADOW 21
735 #define TYPE_SPECIFIER_SAMPLER2DRECT 22
736 #define TYPE_SPECIFIER_SAMPLER2DRECTSHADOW 23
737 #define TYPE_SPECIFIER_STRUCT 24
738 #define TYPE_SPECIFIER_TYPENAME 25
739 #define TYPE_SPECIFIER_MAT23 26
740 #define TYPE_SPECIFIER_MAT32 27
741 #define TYPE_SPECIFIER_MAT24 28
742 #define TYPE_SPECIFIER_MAT42 29
743 #define TYPE_SPECIFIER_MAT34 30
744 #define TYPE_SPECIFIER_MAT43 31
745 #define TYPE_SPECIFIER_SAMPLER_1D_ARRAY 32
746 #define TYPE_SPECIFIER_SAMPLER_2D_ARRAY 33
747 #define TYPE_SPECIFIER_SAMPLER_1D_ARRAY_SHADOW 34
748 #define TYPE_SPECIFIER_SAMPLER_2D_ARRAY_SHADOW 35
749 #define TYPE_SPECIFIER_COUNT 36
750
751 static int
752 parse_type_specifier(slang_parse_ctx * C, slang_output_ctx * O,
753 slang_type_specifier * spec)
754 {
755 int type = *C->I++;
756 switch (type) {
757 case TYPE_SPECIFIER_VOID:
758 spec->type = SLANG_SPEC_VOID;
759 break;
760 case TYPE_SPECIFIER_BOOL:
761 spec->type = SLANG_SPEC_BOOL;
762 break;
763 case TYPE_SPECIFIER_BVEC2:
764 spec->type = SLANG_SPEC_BVEC2;
765 break;
766 case TYPE_SPECIFIER_BVEC3:
767 spec->type = SLANG_SPEC_BVEC3;
768 break;
769 case TYPE_SPECIFIER_BVEC4:
770 spec->type = SLANG_SPEC_BVEC4;
771 break;
772 case TYPE_SPECIFIER_INT:
773 spec->type = SLANG_SPEC_INT;
774 break;
775 case TYPE_SPECIFIER_IVEC2:
776 spec->type = SLANG_SPEC_IVEC2;
777 break;
778 case TYPE_SPECIFIER_IVEC3:
779 spec->type = SLANG_SPEC_IVEC3;
780 break;
781 case TYPE_SPECIFIER_IVEC4:
782 spec->type = SLANG_SPEC_IVEC4;
783 break;
784 case TYPE_SPECIFIER_FLOAT:
785 spec->type = SLANG_SPEC_FLOAT;
786 break;
787 case TYPE_SPECIFIER_VEC2:
788 spec->type = SLANG_SPEC_VEC2;
789 break;
790 case TYPE_SPECIFIER_VEC3:
791 spec->type = SLANG_SPEC_VEC3;
792 break;
793 case TYPE_SPECIFIER_VEC4:
794 spec->type = SLANG_SPEC_VEC4;
795 break;
796 case TYPE_SPECIFIER_MAT2:
797 spec->type = SLANG_SPEC_MAT2;
798 break;
799 case TYPE_SPECIFIER_MAT3:
800 spec->type = SLANG_SPEC_MAT3;
801 break;
802 case TYPE_SPECIFIER_MAT4:
803 spec->type = SLANG_SPEC_MAT4;
804 break;
805 case TYPE_SPECIFIER_MAT23:
806 spec->type = SLANG_SPEC_MAT23;
807 break;
808 case TYPE_SPECIFIER_MAT32:
809 spec->type = SLANG_SPEC_MAT32;
810 break;
811 case TYPE_SPECIFIER_MAT24:
812 spec->type = SLANG_SPEC_MAT24;
813 break;
814 case TYPE_SPECIFIER_MAT42:
815 spec->type = SLANG_SPEC_MAT42;
816 break;
817 case TYPE_SPECIFIER_MAT34:
818 spec->type = SLANG_SPEC_MAT34;
819 break;
820 case TYPE_SPECIFIER_MAT43:
821 spec->type = SLANG_SPEC_MAT43;
822 break;
823 case TYPE_SPECIFIER_SAMPLER1D:
824 spec->type = SLANG_SPEC_SAMPLER_1D;
825 break;
826 case TYPE_SPECIFIER_SAMPLER2D:
827 spec->type = SLANG_SPEC_SAMPLER_2D;
828 break;
829 case TYPE_SPECIFIER_SAMPLER3D:
830 spec->type = SLANG_SPEC_SAMPLER_3D;
831 break;
832 case TYPE_SPECIFIER_SAMPLERCUBE:
833 spec->type = SLANG_SPEC_SAMPLER_CUBE;
834 break;
835 case TYPE_SPECIFIER_SAMPLER2DRECT:
836 spec->type = SLANG_SPEC_SAMPLER_RECT;
837 break;
838 case TYPE_SPECIFIER_SAMPLER1DSHADOW:
839 spec->type = SLANG_SPEC_SAMPLER_1D_SHADOW;
840 break;
841 case TYPE_SPECIFIER_SAMPLER2DSHADOW:
842 spec->type = SLANG_SPEC_SAMPLER_2D_SHADOW;
843 break;
844 case TYPE_SPECIFIER_SAMPLER2DRECTSHADOW:
845 spec->type = SLANG_SPEC_SAMPLER_RECT_SHADOW;
846 break;
847 case TYPE_SPECIFIER_SAMPLER_1D_ARRAY:
848 spec->type = SLANG_SPEC_SAMPLER_1D_ARRAY;
849 break;
850 case TYPE_SPECIFIER_SAMPLER_2D_ARRAY:
851 spec->type = SLANG_SPEC_SAMPLER_2D_ARRAY;
852 break;
853 case TYPE_SPECIFIER_SAMPLER_1D_ARRAY_SHADOW:
854 spec->type = SLANG_SPEC_SAMPLER_1D_ARRAY_SHADOW;
855 break;
856 case TYPE_SPECIFIER_SAMPLER_2D_ARRAY_SHADOW:
857 spec->type = SLANG_SPEC_SAMPLER_2D_ARRAY_SHADOW;
858 break;
859 case TYPE_SPECIFIER_STRUCT:
860 spec->type = SLANG_SPEC_STRUCT;
861 if (!parse_struct(C, O, &spec->_struct))
862 RETURN0;
863 break;
864 case TYPE_SPECIFIER_TYPENAME:
865 spec->type = SLANG_SPEC_STRUCT;
866 {
867 slang_atom a_name;
868 slang_struct *stru;
869
870 a_name = parse_identifier(C);
871 if (a_name == NULL)
872 RETURN0;
873
874 stru = slang_struct_scope_find(O->structs, a_name, 1);
875 if (stru == NULL) {
876 slang_info_log_error(C->L, "undeclared type name '%s'",
877 slang_atom_pool_id(C->atoms, a_name));
878 RETURN0;
879 }
880
881 spec->_struct = (slang_struct *) _slang_alloc(sizeof(slang_struct));
882 if (spec->_struct == NULL) {
883 slang_info_log_memory(C->L);
884 RETURN0;
885 }
886 if (!slang_struct_construct(spec->_struct)) {
887 _slang_free(spec->_struct);
888 spec->_struct = NULL;
889 RETURN0;
890 }
891 if (!slang_struct_copy(spec->_struct, stru))
892 RETURN0;
893 }
894 break;
895 default:
896 RETURN0;
897 }
898 return 1;
899 }
900
901 #define TYPE_SPECIFIER_NONARRAY 0
902 #define TYPE_SPECIFIER_ARRAY 1
903
904 static int
905 parse_type_array_size(slang_parse_ctx *C,
906 slang_output_ctx *O,
907 GLint *array_len)
908 {
909 GLuint size;
910
911 switch (*C->I++) {
912 case TYPE_SPECIFIER_NONARRAY:
913 *array_len = -1; /* -1 = not an array */
914 break;
915 case TYPE_SPECIFIER_ARRAY:
916 if (!parse_array_len(C, O, &size))
917 RETURN0;
918 *array_len = (GLint) size;
919 break;
920 default:
921 assert(0);
922 RETURN0;
923 }
924 return 1;
925 }
926
927 #define PRECISION_DEFAULT 0
928 #define PRECISION_LOW 1
929 #define PRECISION_MEDIUM 2
930 #define PRECISION_HIGH 3
931
932 static int
933 parse_type_precision(slang_parse_ctx *C,
934 slang_type_precision *precision)
935 {
936 GLint prec = *C->I++;
937 switch (prec) {
938 case PRECISION_DEFAULT:
939 *precision = SLANG_PREC_DEFAULT;
940 return 1;
941 case PRECISION_LOW:
942 *precision = SLANG_PREC_LOW;
943 return 1;
944 case PRECISION_MEDIUM:
945 *precision = SLANG_PREC_MEDIUM;
946 return 1;
947 case PRECISION_HIGH:
948 *precision = SLANG_PREC_HIGH;
949 return 1;
950 default:
951 RETURN0;
952 }
953 }
954
955
956 /* parameter qualifier */
957 #define PARAM_QUALIFIER_IN 0
958 #define PARAM_QUALIFIER_OUT 1
959 #define PARAM_QUALIFIER_INOUT 2
960 #define PARAM_QUALIFIER_NONE 3
961 static int
962 parse_varying_qualifier(slang_parse_ctx * C, slang_fully_specified_type *type)
963 {
964 int param_qual = *C->I++;
965
966 if (type->qualifier != SLANG_QUAL_VARYING &&
967 param_qual != PARAM_QUALIFIER_NONE) {
968 slang_info_log_error(C->L, "Invalid type qualifier.");
969 RETURN0;
970 }
971 switch (param_qual) {
972 case PARAM_QUALIFIER_IN:
973 case PARAM_QUALIFIER_NONE:
974 type->varying_kind = SLANG_VARYING_IN;
975 break;
976 case PARAM_QUALIFIER_OUT:
977 type->varying_kind = SLANG_VARYING_OUT;
978 break;
979 case PARAM_QUALIFIER_INOUT:
980 slang_info_log_error(C->L, "Invalid type qualifier.");
981 RETURN0;
982 break;
983 default:
984 RETURN0;
985 }
986 return 1;
987 }
988
989 static int
990 parse_fully_specified_type(slang_parse_ctx * C, slang_output_ctx * O,
991 slang_fully_specified_type * type)
992 {
993 if (!parse_layout_qualifiers(C, &type->layout))
994 RETURN0;
995
996 if (!parse_type_variant(C, &type->variant))
997 RETURN0;
998
999 if (!parse_type_centroid(C, &type->centroid))
1000 RETURN0;
1001
1002 if (!parse_type_qualifier(C, &type->qualifier))
1003 RETURN0;
1004
1005 if (!parse_varying_qualifier(C, type))
1006 RETURN0;
1007
1008 if (!parse_type_precision(C, &type->precision))
1009 RETURN0;
1010
1011 if (!parse_type_specifier(C, O, &type->specifier))
1012 RETURN0;
1013
1014 if (!parse_type_array_size(C, O, &type->array_len))
1015 RETURN0;
1016
1017 if (!O->allow_invariant && type->variant == SLANG_INVARIANT) {
1018 slang_info_log_error(C->L,
1019 "'invariant' keyword not allowed (perhaps set #version 120)");
1020 RETURN0;
1021 }
1022
1023 if (!O->allow_centroid && type->centroid == SLANG_CENTROID) {
1024 slang_info_log_error(C->L,
1025 "'centroid' keyword not allowed (perhaps set #version 120)");
1026 RETURN0;
1027 }
1028 else if (type->centroid == SLANG_CENTROID &&
1029 type->qualifier != SLANG_QUAL_VARYING) {
1030 slang_info_log_error(C->L,
1031 "'centroid' keyword only allowed for varying vars");
1032 RETURN0;
1033 }
1034
1035
1036 /* need this?
1037 if (type->qualifier != SLANG_QUAL_VARYING &&
1038 type->variant == SLANG_INVARIANT) {
1039 slang_info_log_error(C->L,
1040 "invariant qualifer only allowed for varying vars");
1041 RETURN0;
1042 }
1043 */
1044
1045 if (O->allow_precision) {
1046 if (type->precision == SLANG_PREC_DEFAULT) {
1047 assert(type->specifier.type < TYPE_SPECIFIER_COUNT);
1048 /* use the default precision for this datatype */
1049 type->precision = O->default_precision[type->specifier.type];
1050 }
1051 }
1052 else {
1053 /* only default is allowed */
1054 if (type->precision != SLANG_PREC_DEFAULT) {
1055 slang_info_log_error(C->L, "precision qualifiers not allowed");
1056 RETURN0;
1057 }
1058 }
1059
1060 if (!O->allow_array_types && type->array_len >= 0) {
1061 slang_info_log_error(C->L, "first-class array types not allowed");
1062 RETURN0;
1063 }
1064
1065 if (type->array_len >= 0) {
1066 /* convert type to array type (ex: convert "int" to "array of int" */
1067 promote_type_to_array(C, type, type->array_len);
1068 }
1069
1070 return 1;
1071 }
1072
1073 /* operation */
1074 #define OP_END 0
1075 #define OP_BLOCK_BEGIN_NO_NEW_SCOPE 1
1076 #define OP_BLOCK_BEGIN_NEW_SCOPE 2
1077 #define OP_DECLARE 3
1078 #define OP_ASM 4
1079 #define OP_BREAK 5
1080 #define OP_CONTINUE 6
1081 #define OP_DISCARD 7
1082 #define OP_RETURN 8
1083 #define OP_EXPRESSION 9
1084 #define OP_IF 10
1085 #define OP_WHILE 11
1086 #define OP_DO 12
1087 #define OP_FOR 13
1088 #define OP_PUSH_VOID 14
1089 #define OP_PUSH_BOOL 15
1090 #define OP_PUSH_INT 16
1091 #define OP_PUSH_FLOAT 17
1092 #define OP_PUSH_IDENTIFIER 18
1093 #define OP_SEQUENCE 19
1094 #define OP_ASSIGN 20
1095 #define OP_ADDASSIGN 21
1096 #define OP_SUBASSIGN 22
1097 #define OP_MULASSIGN 23
1098 #define OP_DIVASSIGN 24
1099 /*#define OP_MODASSIGN 25*/
1100 /*#define OP_LSHASSIGN 26*/
1101 /*#define OP_RSHASSIGN 27*/
1102 /*#define OP_ORASSIGN 28*/
1103 /*#define OP_XORASSIGN 29*/
1104 /*#define OP_ANDASSIGN 30*/
1105 #define OP_SELECT 31
1106 #define OP_LOGICALOR 32
1107 #define OP_LOGICALXOR 33
1108 #define OP_LOGICALAND 34
1109 /*#define OP_BITOR 35*/
1110 /*#define OP_BITXOR 36*/
1111 /*#define OP_BITAND 37*/
1112 #define OP_EQUAL 38
1113 #define OP_NOTEQUAL 39
1114 #define OP_LESS 40
1115 #define OP_GREATER 41
1116 #define OP_LESSEQUAL 42
1117 #define OP_GREATEREQUAL 43
1118 /*#define OP_LSHIFT 44*/
1119 /*#define OP_RSHIFT 45*/
1120 #define OP_ADD 46
1121 #define OP_SUBTRACT 47
1122 #define OP_MULTIPLY 48
1123 #define OP_DIVIDE 49
1124 /*#define OP_MODULUS 50*/
1125 #define OP_PREINCREMENT 51
1126 #define OP_PREDECREMENT 52
1127 #define OP_PLUS 53
1128 #define OP_MINUS 54
1129 /*#define OP_COMPLEMENT 55*/
1130 #define OP_NOT 56
1131 #define OP_SUBSCRIPT 57
1132 #define OP_CALL 58
1133 #define OP_FIELD 59
1134 #define OP_POSTINCREMENT 60
1135 #define OP_POSTDECREMENT 61
1136 #define OP_PRECISION 62
1137 #define OP_METHOD 63
1138
1139
1140 /**
1141 * When parsing a compound production, this function is used to parse the
1142 * children.
1143 * For example, a while-loop compound will have two children, the
1144 * while condition expression and the loop body. So, this function will
1145 * be called twice to parse those two sub-expressions.
1146 * \param C the parsing context
1147 * \param O the output context
1148 * \param oper the operation we're parsing
1149 * \param statement indicates whether parsing a statement, or expression
1150 * \return 1 if success, 0 if error
1151 */
1152 static int
1153 parse_child_operation(slang_parse_ctx * C, slang_output_ctx * O,
1154 slang_operation * oper, GLboolean statement)
1155 {
1156 slang_operation *ch;
1157
1158 /* grow child array */
1159 ch = slang_operation_grow(&oper->num_children, &oper->children);
1160 if (statement)
1161 return parse_statement(C, O, ch);
1162 return parse_expression(C, O, ch);
1163 }
1164
1165 static int parse_declaration(slang_parse_ctx * C, slang_output_ctx * O);
1166
1167 static int
1168 parse_statement(slang_parse_ctx * C, slang_output_ctx * O,
1169 slang_operation * oper)
1170 {
1171 int op;
1172
1173 oper->locals->outer_scope = O->vars;
1174
1175 op = *C->I++;
1176 switch (op) {
1177 case OP_BLOCK_BEGIN_NO_NEW_SCOPE:
1178 /* parse child statements, do not create new variable scope */
1179 oper->type = SLANG_OPER_BLOCK_NO_NEW_SCOPE;
1180 while (*C->I != OP_END)
1181 if (!parse_child_operation(C, O, oper, GL_TRUE))
1182 RETURN0;
1183 C->I++;
1184 break;
1185 case OP_BLOCK_BEGIN_NEW_SCOPE:
1186 /* parse child statements, create new variable scope */
1187 {
1188 slang_output_ctx o = *O;
1189
1190 oper->type = SLANG_OPER_BLOCK_NEW_SCOPE;
1191 o.vars = oper->locals;
1192 while (*C->I != OP_END)
1193 if (!parse_child_operation(C, &o, oper, GL_TRUE))
1194 RETURN0;
1195 C->I++;
1196 }
1197 break;
1198 case OP_DECLARE:
1199 /* local variable declaration, individual declarators are stored as
1200 * children identifiers
1201 */
1202 oper->type = SLANG_OPER_BLOCK_NO_NEW_SCOPE;
1203 {
1204 const unsigned int first_var = O->vars->num_variables;
1205
1206 /* parse the declaration, note that there can be zero or more
1207 * than one declarators
1208 */
1209 if (!parse_declaration(C, O))
1210 RETURN0;
1211 if (first_var < O->vars->num_variables) {
1212 const unsigned int num_vars = O->vars->num_variables - first_var;
1213 unsigned int i;
1214 assert(oper->num_children == 0);
1215 oper->num_children = num_vars;
1216 oper->children = slang_operation_new(num_vars);
1217 if (oper->children == NULL) {
1218 slang_info_log_memory(C->L);
1219 RETURN0;
1220 }
1221 for (i = first_var; i < O->vars->num_variables; i++) {
1222 slang_operation *o = &oper->children[i - first_var];
1223 slang_variable *var = O->vars->variables[i];
1224 o->type = SLANG_OPER_VARIABLE_DECL;
1225 o->locals->outer_scope = O->vars;
1226 o->a_id = var->a_name;
1227
1228 /* new/someday...
1229 calculate_var_size(C, O, var);
1230 */
1231
1232 if (!legal_identifier(o->a_id)) {
1233 slang_info_log_error(C->L, "illegal variable name '%s'",
1234 (char *) o->a_id);
1235 RETURN0;
1236 }
1237 }
1238 }
1239 }
1240 break;
1241 case OP_ASM:
1242 /* the __asm statement, parse the mnemonic and all its arguments
1243 * as expressions
1244 */
1245 oper->type = SLANG_OPER_ASM;
1246 oper->a_id = parse_identifier(C);
1247 if (oper->a_id == SLANG_ATOM_NULL)
1248 RETURN0;
1249 while (*C->I != OP_END) {
1250 if (!parse_child_operation(C, O, oper, GL_FALSE))
1251 RETURN0;
1252 }
1253 C->I++;
1254 break;
1255 case OP_BREAK:
1256 oper->type = SLANG_OPER_BREAK;
1257 break;
1258 case OP_CONTINUE:
1259 oper->type = SLANG_OPER_CONTINUE;
1260 break;
1261 case OP_DISCARD:
1262 oper->type = SLANG_OPER_DISCARD;
1263 break;
1264 case OP_RETURN:
1265 oper->type = SLANG_OPER_RETURN;
1266 if (!parse_child_operation(C, O, oper, GL_FALSE))
1267 RETURN0;
1268 break;
1269 case OP_EXPRESSION:
1270 oper->type = SLANG_OPER_EXPRESSION;
1271 if (!parse_child_operation(C, O, oper, GL_FALSE))
1272 RETURN0;
1273 break;
1274 case OP_IF:
1275 oper->type = SLANG_OPER_IF;
1276 if (!parse_child_operation(C, O, oper, GL_FALSE))
1277 RETURN0;
1278 if (!parse_child_operation(C, O, oper, GL_TRUE))
1279 RETURN0;
1280 if (!parse_child_operation(C, O, oper, GL_TRUE))
1281 RETURN0;
1282 break;
1283 case OP_WHILE:
1284 {
1285 slang_output_ctx o = *O;
1286
1287 oper->type = SLANG_OPER_WHILE;
1288 o.vars = oper->locals;
1289 if (!parse_child_operation(C, &o, oper, GL_TRUE))
1290 RETURN0;
1291 if (!parse_child_operation(C, &o, oper, GL_TRUE))
1292 RETURN0;
1293 }
1294 break;
1295 case OP_DO:
1296 oper->type = SLANG_OPER_DO;
1297 if (!parse_child_operation(C, O, oper, GL_TRUE))
1298 RETURN0;
1299 if (!parse_child_operation(C, O, oper, GL_FALSE))
1300 RETURN0;
1301 break;
1302 case OP_FOR:
1303 {
1304 slang_output_ctx o = *O;
1305
1306 oper->type = SLANG_OPER_FOR;
1307 o.vars = oper->locals;
1308 if (!parse_child_operation(C, &o, oper, GL_TRUE))
1309 RETURN0;
1310 if (!parse_child_operation(C, &o, oper, GL_TRUE))
1311 RETURN0;
1312 if (!parse_child_operation(C, &o, oper, GL_FALSE))
1313 RETURN0;
1314 if (!parse_child_operation(C, &o, oper, GL_TRUE))
1315 RETURN0;
1316 }
1317 break;
1318 case OP_PRECISION:
1319 {
1320 /* set default precision for a type in this scope */
1321 /* ignored at this time */
1322 int prec_qual = *C->I++;
1323 int datatype = *C->I++;
1324 (void) prec_qual;
1325 (void) datatype;
1326 }
1327 break;
1328 default:
1329 /*printf("Unexpected operation %d\n", op);*/
1330 RETURN0;
1331 }
1332 return 1;
1333 }
1334
1335 static int
1336 handle_nary_expression(slang_parse_ctx * C, slang_operation * op,
1337 slang_operation ** ops, unsigned int *total_ops,
1338 unsigned int n)
1339 {
1340 unsigned int i;
1341
1342 op->children = slang_operation_new(n);
1343 if (op->children == NULL) {
1344 slang_info_log_memory(C->L);
1345 RETURN0;
1346 }
1347 op->num_children = n;
1348
1349 for (i = 0; i < n; i++) {
1350 slang_operation_destruct(&op->children[i]);
1351 op->children[i] = (*ops)[*total_ops - (n + 1 - i)];
1352 }
1353
1354 (*ops)[*total_ops - (n + 1)] = (*ops)[*total_ops - 1];
1355 *total_ops -= n;
1356
1357 *ops = (slang_operation *)
1358 _slang_realloc(*ops,
1359 (*total_ops + n) * sizeof(slang_operation),
1360 *total_ops * sizeof(slang_operation));
1361 if (*ops == NULL) {
1362 slang_info_log_memory(C->L);
1363 RETURN0;
1364 }
1365 return 1;
1366 }
1367
1368 static int
1369 is_constructor_name(const char *name, slang_atom a_name,
1370 slang_struct_scope * structs)
1371 {
1372 if (slang_type_specifier_type_from_string(name) != SLANG_SPEC_VOID)
1373 return 1;
1374 return slang_struct_scope_find(structs, a_name, 1) != NULL;
1375 }
1376
1377 #define FUNCTION_CALL_NONARRAY 0
1378 #define FUNCTION_CALL_ARRAY 1
1379
1380 static int
1381 parse_expression(slang_parse_ctx * C, slang_output_ctx * O,
1382 slang_operation * oper)
1383 {
1384 slang_operation *ops = NULL;
1385 unsigned int num_ops = 0;
1386 int number;
1387
1388 while (*C->I != OP_END) {
1389 slang_operation *op;
1390 const unsigned int op_code = *C->I++;
1391
1392 /* allocate default operation, becomes a no-op if not used */
1393 ops = (slang_operation *)
1394 _slang_realloc(ops,
1395 num_ops * sizeof(slang_operation),
1396 (num_ops + 1) * sizeof(slang_operation));
1397 if (ops == NULL) {
1398 slang_info_log_memory(C->L);
1399 RETURN0;
1400 }
1401 op = &ops[num_ops];
1402 if (!slang_operation_construct(op)) {
1403 slang_info_log_memory(C->L);
1404 RETURN0;
1405 }
1406 num_ops++;
1407 op->locals->outer_scope = O->vars;
1408
1409 switch (op_code) {
1410 case OP_PUSH_VOID:
1411 op->type = SLANG_OPER_VOID;
1412 break;
1413 case OP_PUSH_BOOL:
1414 op->type = SLANG_OPER_LITERAL_BOOL;
1415 if (!parse_number(C, &number))
1416 RETURN0;
1417 op->literal[0] =
1418 op->literal[1] =
1419 op->literal[2] =
1420 op->literal[3] = (GLfloat) number;
1421 op->literal_size = 1;
1422 break;
1423 case OP_PUSH_INT:
1424 op->type = SLANG_OPER_LITERAL_INT;
1425 if (!parse_number(C, &number))
1426 RETURN0;
1427 op->literal[0] =
1428 op->literal[1] =
1429 op->literal[2] =
1430 op->literal[3] = (GLfloat) number;
1431 op->literal_size = 1;
1432 break;
1433 case OP_PUSH_FLOAT:
1434 op->type = SLANG_OPER_LITERAL_FLOAT;
1435 if (!parse_float(C, &op->literal[0]))
1436 RETURN0;
1437 op->literal[1] =
1438 op->literal[2] =
1439 op->literal[3] = op->literal[0];
1440 op->literal_size = 1;
1441 break;
1442 case OP_PUSH_IDENTIFIER:
1443 op->type = SLANG_OPER_IDENTIFIER;
1444 op->a_id = parse_identifier(C);
1445 if (op->a_id == SLANG_ATOM_NULL)
1446 RETURN0;
1447 break;
1448 case OP_SEQUENCE:
1449 op->type = SLANG_OPER_SEQUENCE;
1450 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1451 RETURN0;
1452 break;
1453 case OP_ASSIGN:
1454 op->type = SLANG_OPER_ASSIGN;
1455 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1456 RETURN0;
1457 break;
1458 case OP_ADDASSIGN:
1459 op->type = SLANG_OPER_ADDASSIGN;
1460 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1461 RETURN0;
1462 break;
1463 case OP_SUBASSIGN:
1464 op->type = SLANG_OPER_SUBASSIGN;
1465 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1466 RETURN0;
1467 break;
1468 case OP_MULASSIGN:
1469 op->type = SLANG_OPER_MULASSIGN;
1470 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1471 RETURN0;
1472 break;
1473 case OP_DIVASSIGN:
1474 op->type = SLANG_OPER_DIVASSIGN;
1475 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1476 RETURN0;
1477 break;
1478 /*case OP_MODASSIGN: */
1479 /*case OP_LSHASSIGN: */
1480 /*case OP_RSHASSIGN: */
1481 /*case OP_ORASSIGN: */
1482 /*case OP_XORASSIGN: */
1483 /*case OP_ANDASSIGN: */
1484 case OP_SELECT:
1485 op->type = SLANG_OPER_SELECT;
1486 if (!handle_nary_expression(C, op, &ops, &num_ops, 3))
1487 RETURN0;
1488 break;
1489 case OP_LOGICALOR:
1490 op->type = SLANG_OPER_LOGICALOR;
1491 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1492 RETURN0;
1493 break;
1494 case OP_LOGICALXOR:
1495 op->type = SLANG_OPER_LOGICALXOR;
1496 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1497 RETURN0;
1498 break;
1499 case OP_LOGICALAND:
1500 op->type = SLANG_OPER_LOGICALAND;
1501 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1502 RETURN0;
1503 break;
1504 /*case OP_BITOR: */
1505 /*case OP_BITXOR: */
1506 /*case OP_BITAND: */
1507 case OP_EQUAL:
1508 op->type = SLANG_OPER_EQUAL;
1509 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1510 RETURN0;
1511 break;
1512 case OP_NOTEQUAL:
1513 op->type = SLANG_OPER_NOTEQUAL;
1514 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1515 RETURN0;
1516 break;
1517 case OP_LESS:
1518 op->type = SLANG_OPER_LESS;
1519 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1520 RETURN0;
1521 break;
1522 case OP_GREATER:
1523 op->type = SLANG_OPER_GREATER;
1524 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1525 RETURN0;
1526 break;
1527 case OP_LESSEQUAL:
1528 op->type = SLANG_OPER_LESSEQUAL;
1529 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1530 RETURN0;
1531 break;
1532 case OP_GREATEREQUAL:
1533 op->type = SLANG_OPER_GREATEREQUAL;
1534 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1535 RETURN0;
1536 break;
1537 /*case OP_LSHIFT: */
1538 /*case OP_RSHIFT: */
1539 case OP_ADD:
1540 op->type = SLANG_OPER_ADD;
1541 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1542 RETURN0;
1543 break;
1544 case OP_SUBTRACT:
1545 op->type = SLANG_OPER_SUBTRACT;
1546 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1547 RETURN0;
1548 break;
1549 case OP_MULTIPLY:
1550 op->type = SLANG_OPER_MULTIPLY;
1551 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1552 RETURN0;
1553 break;
1554 case OP_DIVIDE:
1555 op->type = SLANG_OPER_DIVIDE;
1556 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1557 RETURN0;
1558 break;
1559 /*case OP_MODULUS: */
1560 case OP_PREINCREMENT:
1561 op->type = SLANG_OPER_PREINCREMENT;
1562 if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
1563 RETURN0;
1564 break;
1565 case OP_PREDECREMENT:
1566 op->type = SLANG_OPER_PREDECREMENT;
1567 if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
1568 RETURN0;
1569 break;
1570 case OP_PLUS:
1571 op->type = SLANG_OPER_PLUS;
1572 if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
1573 RETURN0;
1574 break;
1575 case OP_MINUS:
1576 op->type = SLANG_OPER_MINUS;
1577 if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
1578 RETURN0;
1579 break;
1580 case OP_NOT:
1581 op->type = SLANG_OPER_NOT;
1582 if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
1583 RETURN0;
1584 break;
1585 /*case OP_COMPLEMENT: */
1586 case OP_SUBSCRIPT:
1587 op->type = SLANG_OPER_SUBSCRIPT;
1588 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1589 RETURN0;
1590 break;
1591 case OP_METHOD:
1592 op->type = SLANG_OPER_METHOD;
1593 op->a_obj = parse_identifier(C);
1594 if (op->a_obj == SLANG_ATOM_NULL)
1595 RETURN0;
1596
1597 op->a_id = parse_identifier(C);
1598 if (op->a_id == SLANG_ATOM_NULL)
1599 RETURN0;
1600
1601 assert(*C->I == OP_END);
1602 C->I++;
1603
1604 while (*C->I != OP_END)
1605 if (!parse_child_operation(C, O, op, GL_FALSE))
1606 RETURN0;
1607 C->I++;
1608 #if 0
1609 /* don't lookup the method (not yet anyway) */
1610 if (!C->parsing_builtin
1611 && !slang_function_scope_find_by_name(O->funs, op->a_id, 1)) {
1612 const char *id;
1613
1614 id = slang_atom_pool_id(C->atoms, op->a_id);
1615 if (!is_constructor_name(id, op->a_id, O->structs)) {
1616 slang_info_log_error(C->L, "%s: undeclared function name.", id);
1617 RETURN0;
1618 }
1619 }
1620 #endif
1621 break;
1622 case OP_CALL:
1623 {
1624 GLboolean array_constructor = GL_FALSE;
1625 GLint array_constructor_size = 0;
1626
1627 op->type = SLANG_OPER_CALL;
1628 op->a_id = parse_identifier(C);
1629 if (op->a_id == SLANG_ATOM_NULL)
1630 RETURN0;
1631 switch (*C->I++) {
1632 case FUNCTION_CALL_NONARRAY:
1633 /* Nothing to do. */
1634 break;
1635 case FUNCTION_CALL_ARRAY:
1636 /* Calling an array constructor. For example:
1637 * float[3](1.1, 2.2, 3.3);
1638 */
1639 if (!O->allow_array_types) {
1640 slang_info_log_error(C->L,
1641 "array constructors not allowed "
1642 "in this GLSL version");
1643 RETURN0;
1644 }
1645 else {
1646 /* parse the array constructor size */
1647 slang_operation array_size;
1648 array_constructor = GL_TRUE;
1649 slang_operation_construct(&array_size);
1650 if (!parse_expression(C, O, &array_size)) {
1651 slang_operation_destruct(&array_size);
1652 return GL_FALSE;
1653 }
1654 if (array_size.type != SLANG_OPER_LITERAL_INT) {
1655 slang_info_log_error(C->L,
1656 "constructor array size is not an integer");
1657 slang_operation_destruct(&array_size);
1658 RETURN0;
1659 }
1660 array_constructor_size = (int) array_size.literal[0];
1661 op->array_constructor = GL_TRUE;
1662 slang_operation_destruct(&array_size);
1663 }
1664 break;
1665 default:
1666 assert(0);
1667 RETURN0;
1668 }
1669 while (*C->I != OP_END)
1670 if (!parse_child_operation(C, O, op, GL_FALSE))
1671 RETURN0;
1672 C->I++;
1673
1674 if (array_constructor &&
1675 array_constructor_size != op->num_children) {
1676 slang_info_log_error(C->L, "number of parameters to array"
1677 " constructor does not match array size");
1678 RETURN0;
1679 }
1680
1681 if (!C->parsing_builtin
1682 && !slang_function_scope_find_by_name(O->funs, op->a_id, 1)) {
1683 const char *id;
1684
1685 id = slang_atom_pool_id(C->atoms, op->a_id);
1686 if (!is_constructor_name(id, op->a_id, O->structs)) {
1687 slang_info_log_error(C->L, "%s: undeclared function name.", id);
1688 RETURN0;
1689 }
1690 }
1691 }
1692 break;
1693 case OP_FIELD:
1694 op->type = SLANG_OPER_FIELD;
1695 op->a_id = parse_identifier(C);
1696 if (op->a_id == SLANG_ATOM_NULL)
1697 RETURN0;
1698 if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
1699 RETURN0;
1700 break;
1701 case OP_POSTINCREMENT:
1702 op->type = SLANG_OPER_POSTINCREMENT;
1703 if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
1704 RETURN0;
1705 break;
1706 case OP_POSTDECREMENT:
1707 op->type = SLANG_OPER_POSTDECREMENT;
1708 if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
1709 RETURN0;
1710 break;
1711 default:
1712 RETURN0;
1713 }
1714 }
1715 C->I++;
1716
1717 slang_operation_destruct(oper);
1718 *oper = *ops; /* struct copy */
1719 _slang_free(ops);
1720
1721 return 1;
1722 }
1723
1724 /* function parameter array presence */
1725 #define PARAMETER_ARRAY_NOT_PRESENT 0
1726 #define PARAMETER_ARRAY_PRESENT 1
1727
1728 static int
1729 parse_parameter_declaration(slang_parse_ctx * C, slang_output_ctx * O,
1730 slang_variable * param)
1731 {
1732 int param_qual, precision_qual;
1733
1734 /* parse and validate the parameter's type qualifiers (there can be
1735 * two at most) because not all combinations are valid
1736 */
1737 if (!parse_type_qualifier(C, &param->type.qualifier))
1738 RETURN0;
1739
1740 param_qual = *C->I++;
1741 switch (param_qual) {
1742 case PARAM_QUALIFIER_IN:
1743 if (param->type.qualifier != SLANG_QUAL_CONST
1744 && param->type.qualifier != SLANG_QUAL_NONE) {
1745 slang_info_log_error(C->L, "Invalid type qualifier.");
1746 RETURN0;
1747 }
1748 break;
1749 case PARAM_QUALIFIER_OUT:
1750 if (param->type.qualifier == SLANG_QUAL_NONE)
1751 param->type.qualifier = SLANG_QUAL_OUT;
1752 else {
1753 slang_info_log_error(C->L, "Invalid type qualifier.");
1754 RETURN0;
1755 }
1756 break;
1757 case PARAM_QUALIFIER_INOUT:
1758 if (param->type.qualifier == SLANG_QUAL_NONE)
1759 param->type.qualifier = SLANG_QUAL_INOUT;
1760 else {
1761 slang_info_log_error(C->L, "Invalid type qualifier.");
1762 RETURN0;
1763 }
1764 break;
1765 case PARAM_QUALIFIER_NONE:
1766 /* like IN but doesn't throw error */
1767 break;
1768 default:
1769 RETURN0;
1770 }
1771
1772 /* parse precision qualifier (lowp, mediump, highp */
1773 precision_qual = *C->I++;
1774 /* ignored at this time */
1775 (void) precision_qual;
1776
1777 /* parse parameter's type specifier and name */
1778 if (!parse_type_specifier(C, O, &param->type.specifier))
1779 RETURN0;
1780 if (!parse_type_array_size(C, O, &param->type.array_len))
1781 RETURN0;
1782 param->a_name = parse_identifier(C);
1783 if (param->a_name == SLANG_ATOM_NULL)
1784 RETURN0;
1785
1786 /* first-class array
1787 */
1788 if (param->type.array_len >= 0) {
1789 slang_type_specifier p;
1790
1791 slang_type_specifier_ctr(&p);
1792 if (!slang_type_specifier_copy(&p, &param->type.specifier)) {
1793 slang_type_specifier_dtr(&p);
1794 RETURN0;
1795 }
1796 if (!convert_to_array(C, param, &p)) {
1797 slang_type_specifier_dtr(&p);
1798 RETURN0;
1799 }
1800 slang_type_specifier_dtr(&p);
1801 param->array_len = param->type.array_len;
1802 }
1803
1804 /* if the parameter is an array, parse its size (the size must be
1805 * explicitly defined
1806 */
1807 if (*C->I++ == PARAMETER_ARRAY_PRESENT) {
1808 slang_type_specifier p;
1809
1810 if (param->type.array_len >= 0) {
1811 slang_info_log_error(C->L, "multi-dimensional arrays not allowed");
1812 RETURN0;
1813 }
1814 slang_type_specifier_ctr(&p);
1815 if (!slang_type_specifier_copy(&p, &param->type.specifier)) {
1816 slang_type_specifier_dtr(&p);
1817 RETURN0;
1818 }
1819 if (!convert_to_array(C, param, &p)) {
1820 slang_type_specifier_dtr(&p);
1821 RETURN0;
1822 }
1823 slang_type_specifier_dtr(&p);
1824 if (!parse_array_len(C, O, &param->array_len))
1825 RETURN0;
1826 }
1827
1828 #if 0
1829 /* calculate the parameter size */
1830 if (!calculate_var_size(C, O, param))
1831 RETURN0;
1832 #endif
1833 /* TODO: allocate the local address here? */
1834 return 1;
1835 }
1836
1837 /* function type */
1838 #define FUNCTION_ORDINARY 0
1839 #define FUNCTION_CONSTRUCTOR 1
1840 #define FUNCTION_OPERATOR 2
1841
1842 /* function parameter */
1843 #define PARAMETER_NONE 0
1844 #define PARAMETER_NEXT 1
1845
1846 /* operator type */
1847 #define OPERATOR_ADDASSIGN 1
1848 #define OPERATOR_SUBASSIGN 2
1849 #define OPERATOR_MULASSIGN 3
1850 #define OPERATOR_DIVASSIGN 4
1851 /*#define OPERATOR_MODASSIGN 5*/
1852 /*#define OPERATOR_LSHASSIGN 6*/
1853 /*#define OPERATOR_RSHASSIGN 7*/
1854 /*#define OPERATOR_ANDASSIGN 8*/
1855 /*#define OPERATOR_XORASSIGN 9*/
1856 /*#define OPERATOR_ORASSIGN 10*/
1857 #define OPERATOR_LOGICALXOR 11
1858 /*#define OPERATOR_BITOR 12*/
1859 /*#define OPERATOR_BITXOR 13*/
1860 /*#define OPERATOR_BITAND 14*/
1861 #define OPERATOR_LESS 15
1862 #define OPERATOR_GREATER 16
1863 #define OPERATOR_LESSEQUAL 17
1864 #define OPERATOR_GREATEREQUAL 18
1865 /*#define OPERATOR_LSHIFT 19*/
1866 /*#define OPERATOR_RSHIFT 20*/
1867 #define OPERATOR_MULTIPLY 21
1868 #define OPERATOR_DIVIDE 22
1869 /*#define OPERATOR_MODULUS 23*/
1870 #define OPERATOR_INCREMENT 24
1871 #define OPERATOR_DECREMENT 25
1872 #define OPERATOR_PLUS 26
1873 #define OPERATOR_MINUS 27
1874 /*#define OPERATOR_COMPLEMENT 28*/
1875 #define OPERATOR_NOT 29
1876
1877 static const struct
1878 {
1879 unsigned int o_code;
1880 const char *o_name;
1881 } operator_names[] = {
1882 {OPERATOR_INCREMENT, "++"},
1883 {OPERATOR_ADDASSIGN, "+="},
1884 {OPERATOR_PLUS, "+"},
1885 {OPERATOR_DECREMENT, "--"},
1886 {OPERATOR_SUBASSIGN, "-="},
1887 {OPERATOR_MINUS, "-"},
1888 {OPERATOR_NOT, "!"},
1889 {OPERATOR_MULASSIGN, "*="},
1890 {OPERATOR_MULTIPLY, "*"},
1891 {OPERATOR_DIVASSIGN, "/="},
1892 {OPERATOR_DIVIDE, "/"},
1893 {OPERATOR_LESSEQUAL, "<="},
1894 /*{ OPERATOR_LSHASSIGN, "<<=" }, */
1895 /*{ OPERATOR_LSHIFT, "<<" }, */
1896 {OPERATOR_LESS, "<"},
1897 {OPERATOR_GREATEREQUAL, ">="},
1898 /*{ OPERATOR_RSHASSIGN, ">>=" }, */
1899 /*{ OPERATOR_RSHIFT, ">>" }, */
1900 {OPERATOR_GREATER, ">"},
1901 /*{ OPERATOR_MODASSIGN, "%=" }, */
1902 /*{ OPERATOR_MODULUS, "%" }, */
1903 /*{ OPERATOR_ANDASSIGN, "&=" }, */
1904 /*{ OPERATOR_BITAND, "&" }, */
1905 /*{ OPERATOR_ORASSIGN, "|=" }, */
1906 /*{ OPERATOR_BITOR, "|" }, */
1907 /*{ OPERATOR_COMPLEMENT, "~" }, */
1908 /*{ OPERATOR_XORASSIGN, "^=" }, */
1909 {OPERATOR_LOGICALXOR, "^^"},
1910 /*{ OPERATOR_BITXOR, "^" } */
1911 };
1912
1913 static slang_atom
1914 parse_operator_name(slang_parse_ctx * C)
1915 {
1916 unsigned int i;
1917
1918 for (i = 0; i < sizeof(operator_names) / sizeof(*operator_names); i++) {
1919 if (operator_names[i].o_code == (unsigned int) (*C->I)) {
1920 slang_atom atom =
1921 slang_atom_pool_atom(C->atoms, operator_names[i].o_name);
1922 if (atom == SLANG_ATOM_NULL) {
1923 slang_info_log_memory(C->L);
1924 RETURN0;
1925 }
1926 C->I++;
1927 return atom;
1928 }
1929 }
1930 RETURN0;
1931 }
1932
1933
1934 static int
1935 parse_function_prototype(slang_parse_ctx * C, slang_output_ctx * O,
1936 slang_function * func)
1937 {
1938 GLuint functype;
1939 /* parse function type and name */
1940 if (!parse_fully_specified_type(C, O, &func->header.type))
1941 RETURN0;
1942
1943 functype = *C->I++;
1944 switch (functype) {
1945 case FUNCTION_ORDINARY:
1946 func->kind = SLANG_FUNC_ORDINARY;
1947 func->header.a_name = parse_identifier(C);
1948 if (func->header.a_name == SLANG_ATOM_NULL)
1949 RETURN0;
1950 break;
1951 case FUNCTION_CONSTRUCTOR:
1952 func->kind = SLANG_FUNC_CONSTRUCTOR;
1953 if (func->header.type.specifier.type == SLANG_SPEC_STRUCT)
1954 RETURN0;
1955 func->header.a_name =
1956 slang_atom_pool_atom(C->atoms,
1957 slang_type_specifier_type_to_string
1958 (func->header.type.specifier.type));
1959 if (func->header.a_name == SLANG_ATOM_NULL) {
1960 slang_info_log_memory(C->L);
1961 RETURN0;
1962 }
1963 break;
1964 case FUNCTION_OPERATOR:
1965 func->kind = SLANG_FUNC_OPERATOR;
1966 func->header.a_name = parse_operator_name(C);
1967 if (func->header.a_name == SLANG_ATOM_NULL)
1968 RETURN0;
1969 break;
1970 default:
1971 RETURN0;
1972 }
1973
1974 if (!legal_identifier(func->header.a_name)) {
1975 slang_info_log_error(C->L, "illegal function name '%s'",
1976 (char *) func->header.a_name);
1977 RETURN0;
1978 }
1979
1980 /* parse function parameters */
1981 while (*C->I++ == PARAMETER_NEXT) {
1982 slang_variable *p = slang_variable_scope_grow(func->parameters);
1983 if (!p) {
1984 slang_info_log_memory(C->L);
1985 RETURN0;
1986 }
1987 if (!parse_parameter_declaration(C, O, p))
1988 RETURN0;
1989 }
1990
1991 /* if the function returns a value, append a hidden __retVal 'out'
1992 * parameter that corresponds to the return value.
1993 */
1994 if (_slang_function_has_return_value(func)) {
1995 slang_variable *p = slang_variable_scope_grow(func->parameters);
1996 slang_atom a_retVal = slang_atom_pool_atom(C->atoms, "__retVal");
1997 assert(a_retVal);
1998 p->a_name = a_retVal;
1999 p->type = func->header.type;
2000 p->type.qualifier = SLANG_QUAL_OUT;
2001 }
2002
2003 /* function formal parameters and local variables share the same
2004 * scope, so save the information about param count in a seperate
2005 * place also link the scope to the global variable scope so when a
2006 * given identifier is not found here, the search process continues
2007 * in the global space
2008 */
2009 func->param_count = func->parameters->num_variables;
2010 func->parameters->outer_scope = O->vars;
2011
2012 return 1;
2013 }
2014
2015 static int
2016 parse_function_definition(slang_parse_ctx * C, slang_output_ctx * O,
2017 slang_function * func)
2018 {
2019 slang_output_ctx o = *O;
2020
2021 if (!parse_function_prototype(C, O, func))
2022 RETURN0;
2023
2024 /* create function's body operation */
2025 func->body = (slang_operation *) _slang_alloc(sizeof(slang_operation));
2026 if (func->body == NULL) {
2027 slang_info_log_memory(C->L);
2028 RETURN0;
2029 }
2030 if (!slang_operation_construct(func->body)) {
2031 _slang_free(func->body);
2032 func->body = NULL;
2033 slang_info_log_memory(C->L);
2034 RETURN0;
2035 }
2036
2037 /* to parse the body the parse context is modified in order to
2038 * capture parsed variables into function's local variable scope
2039 */
2040 C->global_scope = GL_FALSE;
2041 o.vars = func->parameters;
2042 if (!parse_statement(C, &o, func->body))
2043 RETURN0;
2044
2045 C->global_scope = GL_TRUE;
2046 return 1;
2047 }
2048
2049 static GLboolean
2050 initialize_global(slang_assemble_ctx * A, slang_variable * var)
2051 {
2052 slang_operation op_id, op_assign;
2053 GLboolean result;
2054
2055 /* construct the left side of assignment */
2056 if (!slang_operation_construct(&op_id))
2057 return GL_FALSE;
2058 op_id.type = SLANG_OPER_IDENTIFIER;
2059 op_id.a_id = var->a_name;
2060
2061 /* put the variable into operation's scope */
2062 op_id.locals->variables =
2063 (slang_variable **) _slang_alloc(sizeof(slang_variable *));
2064 if (op_id.locals->variables == NULL) {
2065 slang_operation_destruct(&op_id);
2066 return GL_FALSE;
2067 }
2068 op_id.locals->num_variables = 1;
2069 op_id.locals->variables[0] = var;
2070
2071 /* construct the assignment expression */
2072 if (!slang_operation_construct(&op_assign)) {
2073 op_id.locals->num_variables = 0;
2074 slang_operation_destruct(&op_id);
2075 return GL_FALSE;
2076 }
2077 op_assign.type = SLANG_OPER_ASSIGN;
2078 op_assign.children =
2079 (slang_operation *) _slang_alloc(2 * sizeof(slang_operation));
2080 if (op_assign.children == NULL) {
2081 slang_operation_destruct(&op_assign);
2082 op_id.locals->num_variables = 0;
2083 slang_operation_destruct(&op_id);
2084 return GL_FALSE;
2085 }
2086 op_assign.num_children = 2;
2087 op_assign.children[0] = op_id;
2088 op_assign.children[1] = *var->initializer;
2089
2090 result = 1;
2091
2092 /* carefully destroy the operations */
2093 op_assign.num_children = 0;
2094 _slang_free(op_assign.children);
2095 op_assign.children = NULL;
2096 slang_operation_destruct(&op_assign);
2097 op_id.locals->num_variables = 0;
2098 slang_operation_destruct(&op_id);
2099
2100 if (!result)
2101 return GL_FALSE;
2102
2103 return GL_TRUE;
2104 }
2105
2106 /* init declarator list */
2107 #define DECLARATOR_NONE 0
2108 #define DECLARATOR_NEXT 1
2109
2110 /* variable declaration */
2111 #define VARIABLE_NONE 0
2112 #define VARIABLE_IDENTIFIER 1
2113 #define VARIABLE_INITIALIZER 2
2114 #define VARIABLE_ARRAY_EXPLICIT 3
2115 #define VARIABLE_ARRAY_UNKNOWN 4
2116
2117
2118 /**
2119 * Check if it's OK to re-declare a variable with the given new type.
2120 * This happens when applying layout qualifiers to gl_FragCoord or
2121 * (re)setting an array size.
2122 * If redeclaration is OK, return a pointer to the incoming variable
2123 * updated with new type info. Else return NULL;
2124 */
2125 static slang_variable *
2126 redeclare_variable(slang_variable *var,
2127 const slang_fully_specified_type *type)
2128 {
2129 if (slang_fully_specified_types_compatible(&var->type, type)) {
2130 /* replace orig var layout with new layout */
2131 var->type.layout = type->layout;
2132
2133 /* XXX there may be other type updates in the future here */
2134
2135 return var;
2136 }
2137 else
2138 return NULL;
2139 }
2140
2141
2142 /**
2143 * Parse the initializer for a variable declaration.
2144 */
2145 static int
2146 parse_init_declarator(slang_parse_ctx * C, slang_output_ctx * O,
2147 const slang_fully_specified_type * type)
2148 {
2149 GET_CURRENT_CONTEXT(ctx); /* a hack */
2150 slang_variable *var = NULL, *prevDecl;
2151 slang_atom a_name;
2152
2153 /* empty init declatator (without name, e.g. "float ;") */
2154 if (*C->I++ == VARIABLE_NONE)
2155 return 1;
2156
2157 a_name = parse_identifier(C);
2158
2159 /* check if name is already in this scope */
2160 prevDecl = _slang_variable_locate(O->vars, a_name, C->global_scope);
2161 if (prevDecl) {
2162 /* A var with this name has already been declared.
2163 * Check if redeclaring the var with a different type/layout is legal.
2164 */
2165 if (C->global_scope) {
2166 var = redeclare_variable(prevDecl, type);
2167 }
2168 if (!var) {
2169 slang_info_log_error(C->L,
2170 "declaration of '%s' conflicts with previous declaration",
2171 (char *) a_name);
2172 RETURN0;
2173 }
2174 }
2175
2176 if (!var) {
2177 /* make room for a new variable and initialize it */
2178 var = slang_variable_scope_grow(O->vars);
2179 if (!var) {
2180 slang_info_log_memory(C->L);
2181 RETURN0;
2182 }
2183
2184 /* copy the declarator type qualifier/etc info, parse the identifier */
2185 var->type.qualifier = type->qualifier;
2186 var->type.centroid = type->centroid;
2187 var->type.precision = type->precision;
2188 var->type.specifier = type->specifier;/*new*/
2189 var->type.variant = type->variant;
2190 var->type.layout = type->layout;
2191 var->type.array_len = type->array_len;
2192 var->type.varying_kind = type->varying_kind;
2193 var->a_name = a_name;
2194 if (var->a_name == SLANG_ATOM_NULL)
2195 RETURN0;
2196 }
2197
2198 switch (*C->I++) {
2199 case VARIABLE_NONE:
2200 /* simple variable declarator - just copy the specifier */
2201 if (!slang_type_specifier_copy(&var->type.specifier, &type->specifier))
2202 RETURN0;
2203 break;
2204 case VARIABLE_INITIALIZER:
2205 /* initialized variable - copy the specifier and parse the expression */
2206 if (0 && type->array_len >= 0) {
2207 /* The type was something like "float[4]" */
2208 convert_to_array(C, var, &type->specifier);
2209 var->array_len = type->array_len;
2210 }
2211 else {
2212 if (!slang_type_specifier_copy(&var->type.specifier, &type->specifier))
2213 RETURN0;
2214 }
2215 var->initializer =
2216 (slang_operation *) _slang_alloc(sizeof(slang_operation));
2217 if (var->initializer == NULL) {
2218 slang_info_log_memory(C->L);
2219 RETURN0;
2220 }
2221 if (!slang_operation_construct(var->initializer)) {
2222 _slang_free(var->initializer);
2223 var->initializer = NULL;
2224 slang_info_log_memory(C->L);
2225 RETURN0;
2226 }
2227 if (!parse_expression(C, O, var->initializer))
2228 RETURN0;
2229 break;
2230 case VARIABLE_ARRAY_UNKNOWN:
2231 /* unsized array - mark it as array and copy the specifier to
2232 * the array element
2233 */
2234 if (type->array_len >= 0) {
2235 slang_info_log_error(C->L, "multi-dimensional arrays not allowed");
2236 RETURN0;
2237 }
2238 if (!convert_to_array(C, var, &type->specifier))
2239 return GL_FALSE;
2240 break;
2241 case VARIABLE_ARRAY_EXPLICIT:
2242 if (type->array_len >= 0) {
2243 /* the user is trying to do something like: float[2] x[3]; */
2244 slang_info_log_error(C->L, "multi-dimensional arrays not allowed");
2245 RETURN0;
2246 }
2247 if (!convert_to_array(C, var, &type->specifier))
2248 return GL_FALSE;
2249 if (!parse_array_len(C, O, &var->array_len))
2250 return GL_FALSE;
2251 break;
2252 default:
2253 RETURN0;
2254 }
2255
2256 /* allocate global address space for a variable with a known size */
2257 if (C->global_scope
2258 && !(var->type.specifier.type == SLANG_SPEC_ARRAY
2259 && var->array_len == 0)) {
2260 if (!calculate_var_size(C, O, var))
2261 return GL_FALSE;
2262 }
2263
2264 /* emit code for global var decl */
2265 if (C->global_scope) {
2266 slang_assemble_ctx A;
2267 memset(&A, 0, sizeof(slang_assemble_ctx));
2268 A.allow_uniform_initializers = C->version > 110;
2269 A.atoms = C->atoms;
2270 A.space.funcs = O->funs;
2271 A.space.structs = O->structs;
2272 A.space.vars = O->vars;
2273 A.program = O->program;
2274 A.pragmas = O->pragmas;
2275 A.vartable = O->vartable;
2276 A.log = C->L;
2277 A.curFuncEndLabel = NULL;
2278 A.EmitContReturn = ctx->Shader.EmitContReturn;
2279 if (!_slang_codegen_global_variable(&A, var, C->type))
2280 RETURN0;
2281 }
2282
2283 /* initialize global variable */
2284 if (C->global_scope) {
2285 if (var->initializer != NULL) {
2286 slang_assemble_ctx A;
2287 memset(&A, 0, sizeof(slang_assemble_ctx));
2288 A.allow_uniform_initializers = C->version > 110;
2289 A.atoms = C->atoms;
2290 A.space.funcs = O->funs;
2291 A.space.structs = O->structs;
2292 A.space.vars = O->vars;
2293 if (!initialize_global(&A, var))
2294 RETURN0;
2295 }
2296 }
2297
2298 if (var->type.qualifier == SLANG_QUAL_FIXEDINPUT &&
2299 var->a_name == slang_atom_pool_atom(C->atoms, "gl_FragCoord")) {
2300 /* set the program's PixelCenterInteger, OriginUpperLeft fields */
2301 struct gl_fragment_program *fragProg =
2302 (struct gl_fragment_program *) O->program;
2303
2304 if (var->type.layout & SLANG_LAYOUT_UPPER_LEFT_BIT) {
2305 fragProg->OriginUpperLeft = GL_TRUE;
2306 }
2307 if (var->type.layout & SLANG_LAYOUT_PIXEL_CENTER_INTEGER_BIT) {
2308 fragProg->PixelCenterInteger = GL_TRUE;
2309 }
2310 }
2311
2312 return 1;
2313 }
2314
2315 /**
2316 * Parse a list of variable declarations. Each variable may have an
2317 * initializer.
2318 */
2319 static int
2320 parse_init_declarator_list(slang_parse_ctx * C, slang_output_ctx * O)
2321 {
2322 slang_fully_specified_type type;
2323
2324 /* parse the fully specified type, common to all declarators */
2325 if (!slang_fully_specified_type_construct(&type))
2326 RETURN0;
2327 if (!parse_fully_specified_type(C, O, &type)) {
2328 slang_fully_specified_type_destruct(&type);
2329 RETURN0;
2330 }
2331
2332 /* parse declarators, pass-in the parsed type */
2333 do {
2334 if (!parse_init_declarator(C, O, &type)) {
2335 slang_fully_specified_type_destruct(&type);
2336 RETURN0;
2337 }
2338 }
2339 while (*C->I++ == DECLARATOR_NEXT);
2340
2341 slang_fully_specified_type_destruct(&type);
2342 return 1;
2343 }
2344
2345
2346 /**
2347 * Parse a function definition or declaration.
2348 * \param C parsing context
2349 * \param O output context
2350 * \param definition if non-zero expect a definition, else a declaration
2351 * \param parsed_func_ret returns the parsed function
2352 * \return GL_TRUE if success, GL_FALSE if failure
2353 */
2354 static GLboolean
2355 parse_function(slang_parse_ctx * C, slang_output_ctx * O, int definition,
2356 slang_function ** parsed_func_ret)
2357 {
2358 slang_function parsed_func, *found_func;
2359
2360 /* parse function definition/declaration */
2361 if (!slang_function_construct(&parsed_func))
2362 return GL_FALSE;
2363 if (definition) {
2364 if (!parse_function_definition(C, O, &parsed_func)) {
2365 slang_function_destruct(&parsed_func);
2366 return GL_FALSE;
2367 }
2368 }
2369 else {
2370 if (!parse_function_prototype(C, O, &parsed_func)) {
2371 slang_function_destruct(&parsed_func);
2372 return GL_FALSE;
2373 }
2374 }
2375
2376 /* find a function with a prototype matching the parsed one - only
2377 * the current scope is being searched to allow built-in function
2378 * overriding
2379 */
2380 found_func = slang_function_scope_find(O->funs, &parsed_func, 0);
2381 if (found_func == NULL) {
2382 /* New function, add it to the function list */
2383 O->funs->functions =
2384 (slang_function *) _slang_realloc(O->funs->functions,
2385 O->funs->num_functions
2386 * sizeof(slang_function),
2387 (O->funs->num_functions + 1)
2388 * sizeof(slang_function));
2389 if (O->funs->functions == NULL) {
2390 /* Make sure that there are no functions marked, as the
2391 * allocation is currently NULL, in order to avoid
2392 * a potental segfault as we clean up later.
2393 */
2394 O->funs->num_functions = 0;
2395
2396 slang_info_log_memory(C->L);
2397 slang_function_destruct(&parsed_func);
2398 return GL_FALSE;
2399 }
2400 O->funs->functions[O->funs->num_functions] = parsed_func;
2401 O->funs->num_functions++;
2402
2403 /* return the newly parsed function */
2404 *parsed_func_ret = &O->funs->functions[O->funs->num_functions - 1];
2405 }
2406 else {
2407 /* previously defined or declared */
2408 /* TODO: check function return type qualifiers and specifiers */
2409 if (definition) {
2410 if (found_func->body != NULL) {
2411 slang_info_log_error(C->L, "%s: function already has a body.",
2412 slang_atom_pool_id(C->atoms,
2413 parsed_func.header.
2414 a_name));
2415 slang_function_destruct(&parsed_func);
2416 return GL_FALSE;
2417 }
2418
2419 /* destroy the existing function declaration and replace it
2420 * with the new one
2421 */
2422 slang_function_destruct(found_func);
2423 *found_func = parsed_func;
2424 }
2425 else {
2426 /* another declaration of the same function prototype - ignore it */
2427 slang_function_destruct(&parsed_func);
2428 }
2429
2430 /* return the found function */
2431 *parsed_func_ret = found_func;
2432 }
2433
2434 return GL_TRUE;
2435 }
2436
2437 /* declaration */
2438 #define DECLARATION_FUNCTION_PROTOTYPE 1
2439 #define DECLARATION_INIT_DECLARATOR_LIST 2
2440
2441 static int
2442 parse_declaration(slang_parse_ctx * C, slang_output_ctx * O)
2443 {
2444 switch (*C->I++) {
2445 case DECLARATION_INIT_DECLARATOR_LIST:
2446 if (!parse_init_declarator_list(C, O))
2447 RETURN0;
2448 break;
2449 case DECLARATION_FUNCTION_PROTOTYPE:
2450 {
2451 slang_function *dummy_func;
2452
2453 if (!parse_function(C, O, 0, &dummy_func))
2454 RETURN0;
2455 }
2456 break;
2457 default:
2458 RETURN0;
2459 }
2460 return 1;
2461 }
2462
2463 static int
2464 parse_default_precision(slang_parse_ctx * C, slang_output_ctx * O)
2465 {
2466 int precision, type;
2467
2468 if (!O->allow_precision) {
2469 slang_info_log_error(C->L, "syntax error at \"precision\"");
2470 RETURN0;
2471 }
2472
2473 precision = *C->I++;
2474 switch (precision) {
2475 case PRECISION_LOW:
2476 case PRECISION_MEDIUM:
2477 case PRECISION_HIGH:
2478 /* OK */
2479 break;
2480 default:
2481 _mesa_problem(NULL, "unexpected precision %d at %s:%d\n",
2482 precision, __FILE__, __LINE__);
2483 RETURN0;
2484 }
2485
2486 type = *C->I++;
2487 switch (type) {
2488 case TYPE_SPECIFIER_FLOAT:
2489 case TYPE_SPECIFIER_INT:
2490 case TYPE_SPECIFIER_SAMPLER1D:
2491 case TYPE_SPECIFIER_SAMPLER2D:
2492 case TYPE_SPECIFIER_SAMPLER3D:
2493 case TYPE_SPECIFIER_SAMPLERCUBE:
2494 case TYPE_SPECIFIER_SAMPLER1DSHADOW:
2495 case TYPE_SPECIFIER_SAMPLER2DSHADOW:
2496 case TYPE_SPECIFIER_SAMPLER2DRECT:
2497 case TYPE_SPECIFIER_SAMPLER2DRECTSHADOW:
2498 case TYPE_SPECIFIER_SAMPLER_1D_ARRAY:
2499 case TYPE_SPECIFIER_SAMPLER_2D_ARRAY:
2500 case TYPE_SPECIFIER_SAMPLER_1D_ARRAY_SHADOW:
2501 case TYPE_SPECIFIER_SAMPLER_2D_ARRAY_SHADOW:
2502 /* OK */
2503 break;
2504 default:
2505 _mesa_problem(NULL, "unexpected type %d at %s:%d\n",
2506 type, __FILE__, __LINE__);
2507 RETURN0;
2508 }
2509
2510 assert(type < TYPE_SPECIFIER_COUNT);
2511 O->default_precision[type] = precision;
2512
2513 return 1;
2514 }
2515
2516
2517 /**
2518 * Initialize the default precision for all types.
2519 * XXX this info isn't used yet.
2520 */
2521 static void
2522 init_default_precision(slang_output_ctx *O, slang_unit_type type)
2523 {
2524 GET_CURRENT_CONTEXT(ctx);
2525 GLuint i;
2526 for (i = 0; i < TYPE_SPECIFIER_COUNT; i++) {
2527 #if FEATURE_es2_glsl
2528 if (ctx->API == API_OPENGLES2)
2529 O->default_precision[i] = PRECISION_LOW;
2530 else
2531 O->default_precision[i] = PRECISION_HIGH;
2532 #else
2533 (void) ctx;
2534 O->default_precision[i] = PRECISION_HIGH;
2535 #endif
2536 }
2537
2538 if (type == SLANG_UNIT_VERTEX_SHADER || type == SLANG_UNIT_GEOMETRY_SHADER) {
2539 O->default_precision[TYPE_SPECIFIER_FLOAT] = PRECISION_HIGH;
2540 O->default_precision[TYPE_SPECIFIER_INT] = PRECISION_HIGH;
2541 }
2542 else {
2543 O->default_precision[TYPE_SPECIFIER_INT] = PRECISION_MEDIUM;
2544 }
2545 }
2546
2547
2548 static int
2549 parse_invariant(slang_parse_ctx * C, slang_output_ctx * O)
2550 {
2551 if (O->allow_invariant) {
2552 slang_atom *a = parse_identifier(C);
2553 /* XXX not doing anything with this var yet */
2554 /*printf("ID: %s\n", (char*) a);*/
2555 return a ? 1 : 0;
2556 }
2557 else {
2558 slang_info_log_error(C->L, "syntax error at \"invariant\"");
2559 RETURN0;
2560 }
2561 }
2562
2563
2564 /* external declaration or default precision specifier */
2565 #define EXTERNAL_NULL 0
2566 #define EXTERNAL_FUNCTION_DEFINITION 1
2567 #define EXTERNAL_DECLARATION 2
2568 #define DEFAULT_PRECISION 3
2569 #define INVARIANT_STMT 4
2570
2571
2572 static GLboolean
2573 parse_code_unit(slang_parse_ctx * C, slang_code_unit * unit,
2574 struct gl_shader *shader)
2575 {
2576 GET_CURRENT_CONTEXT(ctx);
2577 slang_output_ctx o;
2578 GLboolean success;
2579 GLuint maxRegs;
2580 slang_function *mainFunc = NULL;
2581
2582 if (unit->type == SLANG_UNIT_FRAGMENT_BUILTIN ||
2583 unit->type == SLANG_UNIT_FRAGMENT_SHADER) {
2584 maxRegs = ctx->Const.FragmentProgram.MaxTemps;
2585 }
2586 else if (unit->type == SLANG_UNIT_VERTEX_BUILTIN ||
2587 unit->type == SLANG_UNIT_VERTEX_SHADER) {
2588 maxRegs = ctx->Const.VertexProgram.MaxTemps;
2589 } else {
2590 assert(unit->type == SLANG_UNIT_GEOMETRY_BUILTIN ||
2591 unit->type == SLANG_UNIT_GEOMETRY_SHADER);
2592 maxRegs = ctx->Const.GeometryProgram.MaxTemps;
2593 }
2594
2595 /* setup output context */
2596 o.funs = &unit->funs;
2597 o.structs = &unit->structs;
2598 o.vars = &unit->vars;
2599 o.program = shader ? shader->Program : NULL;
2600 o.pragmas = shader ? &shader->Pragmas : NULL;
2601 o.vartable = _slang_new_var_table(maxRegs);
2602 _slang_push_var_table(o.vartable);
2603
2604 /* allow 'invariant' keyword? */
2605 #if FEATURE_es2_glsl
2606 o.allow_invariant =
2607 (ctx->API == API_OPENGLES2 || C->version >= 120) ? GL_TRUE : GL_FALSE;
2608 #else
2609 o.allow_invariant = (C->version >= 120) ? GL_TRUE : GL_FALSE;
2610 #endif
2611
2612 /* allow 'centroid' keyword? */
2613 o.allow_centroid = (C->version >= 120) ? GL_TRUE : GL_FALSE;
2614
2615 /* allow 'lowp/mediump/highp' keywords? */
2616 #if FEATURE_es2_glsl
2617 o.allow_precision =
2618 (ctx->API == API_OPENGLES2 || C->version >= 120) ? GL_TRUE : GL_FALSE;
2619 #else
2620 o.allow_precision = (C->version >= 120) ? GL_TRUE : GL_FALSE;
2621 #endif
2622 init_default_precision(&o, unit->type);
2623
2624 /* allow 'float[]' keyword? */
2625 o.allow_array_types = (C->version >= 120) ? GL_TRUE : GL_FALSE;
2626
2627 /* parse individual functions and declarations */
2628 while (*C->I != EXTERNAL_NULL) {
2629 switch (*C->I++) {
2630 case EXTERNAL_FUNCTION_DEFINITION:
2631 {
2632 slang_function *func;
2633 success = parse_function(C, &o, 1, &func);
2634 if (success && strcmp((char *) func->header.a_name, "main") == 0) {
2635 /* found main() */
2636 mainFunc = func;
2637 }
2638 }
2639 break;
2640 case EXTERNAL_DECLARATION:
2641 success = parse_declaration(C, &o);
2642 break;
2643 case DEFAULT_PRECISION:
2644 success = parse_default_precision(C, &o);
2645 break;
2646 case INVARIANT_STMT:
2647 success = parse_invariant(C, &o);
2648 break;
2649 default:
2650 success = GL_FALSE;
2651 }
2652
2653 if (!success) {
2654 /* xxx free codegen */
2655 _slang_pop_var_table(o.vartable);
2656 return GL_FALSE;
2657 }
2658 }
2659 C->I++;
2660
2661 if (mainFunc) {
2662 /* assemble (generate code) for main() */
2663 slang_assemble_ctx A;
2664 memset(&A, 0, sizeof(slang_assemble_ctx));
2665 A.atoms = C->atoms;
2666 A.space.funcs = o.funs;
2667 A.space.structs = o.structs;
2668 A.space.vars = o.vars;
2669 A.program = o.program;
2670 A.pragmas = &shader->Pragmas;
2671 A.vartable = o.vartable;
2672 A.EmitContReturn = ctx->Shader.EmitContReturn;
2673 A.log = C->L;
2674 A.allow_uniform_initializers = C->version > 110;
2675
2676 /* main() takes no parameters */
2677 if (mainFunc->param_count > 0) {
2678 slang_info_log_error(A.log, "main() takes no arguments");
2679 return GL_FALSE;
2680 }
2681
2682 _slang_codegen_function(&A, mainFunc);
2683
2684 shader->Main = GL_TRUE; /* this shader defines main() */
2685
2686 shader->UnresolvedRefs = A.UnresolvedRefs;
2687 }
2688
2689 _slang_pop_var_table(o.vartable);
2690 _slang_delete_var_table(o.vartable);
2691
2692 return GL_TRUE;
2693 }
2694
2695 static GLboolean
2696 compile_binary(const unsigned char * prod, slang_code_unit * unit,
2697 GLuint version,
2698 slang_unit_type type, slang_info_log * infolog,
2699 slang_code_unit * builtin, slang_code_unit * downlink,
2700 struct gl_shader *shader)
2701 {
2702 slang_parse_ctx C;
2703
2704 unit->type = type;
2705
2706 /* setup parse context */
2707 C.I = prod;
2708 C.L = infolog;
2709 C.parsing_builtin = (builtin == NULL);
2710 C.global_scope = GL_TRUE;
2711 C.atoms = &unit->object->atompool;
2712 C.type = type;
2713 C.version = version;
2714
2715 if (!check_revision(&C))
2716 return GL_FALSE;
2717
2718 if (downlink != NULL) {
2719 unit->vars.outer_scope = &downlink->vars;
2720 unit->funs.outer_scope = &downlink->funs;
2721 unit->structs.outer_scope = &downlink->structs;
2722 }
2723
2724 /* parse translation unit */
2725 return parse_code_unit(&C, unit, shader);
2726 }
2727
2728 static GLboolean
2729 compile_with_grammar(const char *source,
2730 slang_code_unit *unit,
2731 slang_unit_type type,
2732 slang_info_log *infolog,
2733 slang_code_unit *builtin,
2734 struct gl_shader *shader,
2735 struct gl_sl_pragmas *pragmas,
2736 unsigned int shader_type,
2737 unsigned int parsing_builtin)
2738 {
2739 GET_CURRENT_CONTEXT(ctx);
2740 struct sl_pp_purify_options options;
2741 struct sl_pp_context *context;
2742 unsigned char *prod;
2743 GLuint size;
2744 unsigned int version;
2745 unsigned int maxVersion;
2746 int result;
2747 char errmsg[200] = "";
2748
2749 assert(shader_type == 1 || shader_type == 2);
2750
2751 memset(&options, 0, sizeof(options));
2752
2753 context = sl_pp_context_create(source, &options);
2754 if (!context) {
2755 slang_info_log_error(infolog, "out of memory");
2756 return GL_FALSE;
2757 }
2758
2759 if (sl_pp_version(context, &version)) {
2760 slang_info_log_error(infolog, "%s", sl_pp_context_error_message(context));
2761 sl_pp_context_destroy(context);
2762 return GL_FALSE;
2763 }
2764
2765 if (sl_pp_context_add_extension(context, "GL_ARB_draw_buffers") ||
2766 sl_pp_context_add_extension(context, "GL_ARB_texture_rectangle")) {
2767 slang_info_log_error(infolog, "%s", sl_pp_context_error_message(context));
2768 sl_pp_context_destroy(context);
2769 return GL_FALSE;
2770 }
2771
2772 if (type == SLANG_UNIT_FRAGMENT_SHADER) {
2773 sl_pp_context_add_extension(context, "GL_ARB_fragment_coord_conventions");
2774 }
2775
2776
2777 #if FEATURE_es2_glsl
2778 if (ctx->API == API_OPENGLES2) {
2779 if (sl_pp_context_add_predefined(context, "GL_ES", "1") ||
2780 sl_pp_context_add_predefined(context, "GL_FRAGMENT_PRECISION_HIGH", "1")) {
2781 slang_info_log_error(infolog, "%s", sl_pp_context_error_message(context));
2782 sl_pp_context_destroy(context);
2783 return GL_FALSE;
2784 }
2785 }
2786 #else
2787 (void) ctx;
2788 #endif
2789
2790 #if FEATURE_ARB_shading_language_120
2791 maxVersion = 120;
2792 #elif FEATURE_es2_glsl
2793 maxVersion = 100;
2794 #else
2795 maxVersion = 110;
2796 #endif
2797
2798 if (version > maxVersion ||
2799 (version != 100 && version != 110 && version != 120)) {
2800 slang_info_log_error(infolog,
2801 "language version %.2f is not supported.",
2802 version * 0.01);
2803 sl_pp_context_destroy(context);
2804 return GL_FALSE;
2805 }
2806
2807 /* Finally check the syntax and generate its binary representation. */
2808 result = sl_cl_compile(context,
2809 shader_type,
2810 parsing_builtin,
2811 &prod,
2812 &size,
2813 errmsg,
2814 sizeof(errmsg));
2815
2816 sl_pp_context_destroy(context);
2817
2818 if (result) {
2819 /*GLint pos;*/
2820
2821 slang_info_log_error(infolog, errmsg);
2822 /* syntax error (possibly in library code) */
2823 #if 0
2824 {
2825 int line, col;
2826 char *s;
2827 s = (char *) _mesa_find_line_column((const GLubyte *) source,
2828 (const GLubyte *) source + pos,
2829 &line, &col);
2830 printf("Error on line %d, col %d: %s\n", line, col, s);
2831 }
2832 #endif
2833 return GL_FALSE;
2834 }
2835
2836 /* Syntax is okay - translate it to internal representation. */
2837 if (!compile_binary(prod, unit, version, type, infolog, builtin,
2838 &builtin[SLANG_BUILTIN_TOTAL - 1],
2839 shader)) {
2840 free(prod);
2841 return GL_FALSE;
2842 }
2843 free(prod);
2844 return GL_TRUE;
2845 }
2846
2847 static const unsigned char slang_core_gc[] = {
2848 #include "library/slang_core_gc.h"
2849 };
2850
2851 static const unsigned char slang_120_core_gc[] = {
2852 #include "library/slang_120_core_gc.h"
2853 };
2854
2855 static const unsigned char slang_120_fragment_gc[] = {
2856 #include "library/slang_builtin_120_fragment_gc.h"
2857 };
2858
2859 static const unsigned char slang_common_builtin_gc[] = {
2860 #include "library/slang_common_builtin_gc.h"
2861 };
2862
2863 static const unsigned char slang_fragment_builtin_gc[] = {
2864 #include "library/slang_fragment_builtin_gc.h"
2865 };
2866
2867 static const unsigned char slang_vertex_builtin_gc[] = {
2868 #include "library/slang_vertex_builtin_gc.h"
2869 };
2870
2871 static const unsigned char slang_geometry_builtin_gc[] = {
2872 #include "library/slang_geometry_builtin_gc.h"
2873 };
2874
2875 static GLboolean
2876 compile_object(const char *source,
2877 slang_code_object *object,
2878 slang_unit_type type,
2879 slang_info_log *infolog,
2880 struct gl_shader *shader,
2881 struct gl_sl_pragmas *pragmas)
2882 {
2883 slang_code_unit *builtins = NULL;
2884 GLuint base_version = 110;
2885 unsigned int shader_type;
2886 unsigned int parsing_builtin;
2887
2888 /* set shader type - the syntax is slightly different for different shaders */
2889 if (type == SLANG_UNIT_FRAGMENT_SHADER || type == SLANG_UNIT_FRAGMENT_BUILTIN) {
2890 shader_type = 1;
2891 } else {
2892 shader_type = 2;
2893 }
2894
2895 /* enable language extensions */
2896 parsing_builtin = 1;
2897
2898 /* if parsing user-specified shader, load built-in library */
2899 if (type == SLANG_UNIT_FRAGMENT_SHADER || type == SLANG_UNIT_VERTEX_SHADER ||
2900 type == SLANG_UNIT_GEOMETRY_SHADER) {
2901 /* compile core functionality first */
2902 if (!compile_binary(slang_core_gc,
2903 &object->builtin[SLANG_BUILTIN_CORE],
2904 base_version,
2905 SLANG_UNIT_FRAGMENT_BUILTIN, infolog,
2906 NULL, NULL, NULL))
2907 return GL_FALSE;
2908
2909 #if FEATURE_ARB_shading_language_120
2910 if (!compile_binary(slang_120_core_gc,
2911 &object->builtin[SLANG_BUILTIN_120_CORE],
2912 120,
2913 SLANG_UNIT_FRAGMENT_BUILTIN, infolog,
2914 NULL, &object->builtin[SLANG_BUILTIN_CORE], NULL))
2915 return GL_FALSE;
2916 #endif
2917
2918 /* compile common functions and variables, link to core */
2919 if (!compile_binary(slang_common_builtin_gc,
2920 &object->builtin[SLANG_BUILTIN_COMMON],
2921 #if FEATURE_ARB_shading_language_120
2922 120,
2923 #else
2924 base_version,
2925 #endif
2926 SLANG_UNIT_FRAGMENT_BUILTIN, infolog, NULL,
2927 #if FEATURE_ARB_shading_language_120
2928 &object->builtin[SLANG_BUILTIN_120_CORE],
2929 #else
2930 &object->builtin[SLANG_BUILTIN_CORE],
2931 #endif
2932 NULL))
2933 return GL_FALSE;
2934
2935 /* compile target-specific functions and variables, link to common */
2936 if (type == SLANG_UNIT_FRAGMENT_SHADER) {
2937 if (!compile_binary(slang_fragment_builtin_gc,
2938 &object->builtin[SLANG_BUILTIN_TARGET],
2939 base_version,
2940 SLANG_UNIT_FRAGMENT_BUILTIN, infolog, NULL,
2941 &object->builtin[SLANG_BUILTIN_COMMON], NULL))
2942 return GL_FALSE;
2943 #if FEATURE_ARB_shading_language_120
2944 if (!compile_binary(slang_120_fragment_gc,
2945 &object->builtin[SLANG_BUILTIN_TARGET],
2946 120,
2947 SLANG_UNIT_FRAGMENT_BUILTIN, infolog, NULL,
2948 &object->builtin[SLANG_BUILTIN_COMMON], NULL))
2949 return GL_FALSE;
2950 #endif
2951 }
2952 else if (type == SLANG_UNIT_VERTEX_SHADER) {
2953 if (!compile_binary(slang_vertex_builtin_gc,
2954 &object->builtin[SLANG_BUILTIN_TARGET],
2955 base_version,
2956 SLANG_UNIT_VERTEX_BUILTIN, infolog, NULL,
2957 &object->builtin[SLANG_BUILTIN_COMMON], NULL))
2958 return GL_FALSE;
2959 }
2960 #if FEATURE_ARB_geometry_shader4
2961 else if (type == SLANG_UNIT_GEOMETRY_SHADER) {
2962 if (!compile_binary(slang_geometry_builtin_gc,
2963 &object->builtin[SLANG_BUILTIN_TARGET],
2964 base_version,
2965 SLANG_UNIT_GEOMETRY_BUILTIN, infolog, NULL,
2966 &object->builtin[SLANG_BUILTIN_COMMON], NULL))
2967 return GL_FALSE;
2968 }
2969 #endif
2970
2971 /* disable language extensions */
2972 parsing_builtin = 0;
2973
2974 builtins = object->builtin;
2975 }
2976
2977 /* compile the actual shader - pass-in built-in library for external shader */
2978 return compile_with_grammar(source,
2979 &object->unit,
2980 type,
2981 infolog,
2982 builtins,
2983 shader,
2984 pragmas,
2985 shader_type,
2986 parsing_builtin);
2987 }
2988
2989
2990 GLboolean
2991 _slang_compile(GLcontext *ctx, struct gl_shader *shader)
2992 {
2993 GLboolean success;
2994 slang_info_log info_log;
2995 slang_code_object obj;
2996 slang_unit_type type;
2997 GLenum progTarget;
2998
2999 if (shader->Type == GL_VERTEX_SHADER) {
3000 type = SLANG_UNIT_VERTEX_SHADER;
3001 }
3002 else if (shader->Type == GL_FRAGMENT_SHADER) {
3003 type = SLANG_UNIT_FRAGMENT_SHADER;
3004 } else {
3005 assert(shader->Type == GL_GEOMETRY_SHADER_ARB);
3006 type = SLANG_UNIT_GEOMETRY_SHADER;
3007 }
3008
3009 if (!shader->Source)
3010 return GL_FALSE;
3011
3012 ctx->Shader.MemPool = _slang_new_mempool(1024*1024);
3013
3014 shader->Main = GL_FALSE;
3015
3016 /* free the shader's old instructions, etc */
3017 _mesa_reference_program(ctx, &shader->Program, NULL);
3018
3019 /* allocate new GPU program, parameter lists, etc. */
3020 if (shader->Type == GL_VERTEX_SHADER)
3021 progTarget = GL_VERTEX_PROGRAM_ARB;
3022 else if (shader->Type == GL_FRAGMENT_SHADER)
3023 progTarget = GL_FRAGMENT_PROGRAM_ARB;
3024 else
3025 progTarget = MESA_GEOMETRY_PROGRAM;
3026 shader->Program = ctx->Driver.NewProgram(ctx, progTarget, 1);
3027 shader->Program->Parameters = _mesa_new_parameter_list();
3028 shader->Program->Varying = _mesa_new_parameter_list();
3029 shader->Program->Attributes = _mesa_new_parameter_list();
3030
3031 slang_info_log_construct(&info_log);
3032 _slang_code_object_ctr(&obj);
3033
3034 success = compile_object(shader->Source,
3035 &obj,
3036 type,
3037 &info_log,
3038 shader,
3039 &shader->Pragmas);
3040
3041 /* free shader's prev info log */
3042 if (shader->InfoLog) {
3043 free(shader->InfoLog);
3044 shader->InfoLog = NULL;
3045 }
3046
3047 if (info_log.text) {
3048 /* copy info-log string to shader object */
3049 shader->InfoLog = _mesa_strdup(info_log.text);
3050 }
3051
3052 if (info_log.error_flag) {
3053 success = GL_FALSE;
3054 }
3055
3056 slang_info_log_destruct(&info_log);
3057 _slang_code_object_dtr(&obj);
3058
3059 _slang_delete_mempool((slang_mempool *) ctx->Shader.MemPool);
3060 ctx->Shader.MemPool = NULL;
3061
3062 /* remove any reads of output registers */
3063 #if 0
3064 printf("Pre-remove output reads:\n");
3065 _mesa_print_program(shader->Program);
3066 #endif
3067 _mesa_remove_output_reads(shader->Program, PROGRAM_OUTPUT);
3068 if (shader->Type == GL_VERTEX_SHADER) {
3069 /* and remove writes to varying vars in vertex programs */
3070 _mesa_remove_output_reads(shader->Program, PROGRAM_VARYING);
3071 }
3072 #if 0
3073 printf("Post-remove output reads:\n");
3074 _mesa_print_program(shader->Program);
3075 #endif
3076
3077 shader->CompileStatus = success;
3078
3079 if (success) {
3080 if (shader->Pragmas.Optimize &&
3081 (ctx->Shader.Flags & GLSL_NO_OPT) == 0) {
3082 _mesa_optimize_program(ctx, shader->Program);
3083 }
3084 if ((ctx->Shader.Flags & GLSL_NOP_VERT) &&
3085 shader->Program->Target == GL_VERTEX_PROGRAM_ARB) {
3086 _mesa_nop_vertex_program(ctx,
3087 (struct gl_vertex_program *) shader->Program);
3088 }
3089 if ((ctx->Shader.Flags & GLSL_NOP_FRAG) &&
3090 shader->Program->Target == GL_FRAGMENT_PROGRAM_ARB) {
3091 _mesa_nop_fragment_program(ctx,
3092 (struct gl_fragment_program *) shader->Program);
3093 }
3094 }
3095
3096 if (ctx->Shader.Flags & GLSL_LOG) {
3097 _mesa_write_shader_to_file(shader);
3098 }
3099
3100 return success;
3101 }
3102