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mesa: rename src/mesa/shader/ to src/mesa/program/
[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 static int
956 parse_fully_specified_type(slang_parse_ctx * C, slang_output_ctx * O,
957 slang_fully_specified_type * type)
958 {
959 if (!parse_layout_qualifiers(C, &type->layout))
960 RETURN0;
961
962 if (!parse_type_variant(C, &type->variant))
963 RETURN0;
964
965 if (!parse_type_centroid(C, &type->centroid))
966 RETURN0;
967
968 if (!parse_type_qualifier(C, &type->qualifier))
969 RETURN0;
970
971 if (!parse_type_precision(C, &type->precision))
972 RETURN0;
973
974 if (!parse_type_specifier(C, O, &type->specifier))
975 RETURN0;
976
977 if (!parse_type_array_size(C, O, &type->array_len))
978 RETURN0;
979
980 if (!O->allow_invariant && type->variant == SLANG_INVARIANT) {
981 slang_info_log_error(C->L,
982 "'invariant' keyword not allowed (perhaps set #version 120)");
983 RETURN0;
984 }
985
986 if (!O->allow_centroid && type->centroid == SLANG_CENTROID) {
987 slang_info_log_error(C->L,
988 "'centroid' keyword not allowed (perhaps set #version 120)");
989 RETURN0;
990 }
991 else if (type->centroid == SLANG_CENTROID &&
992 type->qualifier != SLANG_QUAL_VARYING) {
993 slang_info_log_error(C->L,
994 "'centroid' keyword only allowed for varying vars");
995 RETURN0;
996 }
997
998
999 /* need this?
1000 if (type->qualifier != SLANG_QUAL_VARYING &&
1001 type->variant == SLANG_INVARIANT) {
1002 slang_info_log_error(C->L,
1003 "invariant qualifer only allowed for varying vars");
1004 RETURN0;
1005 }
1006 */
1007
1008 if (O->allow_precision) {
1009 if (type->precision == SLANG_PREC_DEFAULT) {
1010 assert(type->specifier.type < TYPE_SPECIFIER_COUNT);
1011 /* use the default precision for this datatype */
1012 type->precision = O->default_precision[type->specifier.type];
1013 }
1014 }
1015 else {
1016 /* only default is allowed */
1017 if (type->precision != SLANG_PREC_DEFAULT) {
1018 slang_info_log_error(C->L, "precision qualifiers not allowed");
1019 RETURN0;
1020 }
1021 }
1022
1023 if (!O->allow_array_types && type->array_len >= 0) {
1024 slang_info_log_error(C->L, "first-class array types not allowed");
1025 RETURN0;
1026 }
1027
1028 if (type->array_len >= 0) {
1029 /* convert type to array type (ex: convert "int" to "array of int" */
1030 promote_type_to_array(C, type, type->array_len);
1031 }
1032
1033 return 1;
1034 }
1035
1036 /* operation */
1037 #define OP_END 0
1038 #define OP_BLOCK_BEGIN_NO_NEW_SCOPE 1
1039 #define OP_BLOCK_BEGIN_NEW_SCOPE 2
1040 #define OP_DECLARE 3
1041 #define OP_ASM 4
1042 #define OP_BREAK 5
1043 #define OP_CONTINUE 6
1044 #define OP_DISCARD 7
1045 #define OP_RETURN 8
1046 #define OP_EXPRESSION 9
1047 #define OP_IF 10
1048 #define OP_WHILE 11
1049 #define OP_DO 12
1050 #define OP_FOR 13
1051 #define OP_PUSH_VOID 14
1052 #define OP_PUSH_BOOL 15
1053 #define OP_PUSH_INT 16
1054 #define OP_PUSH_FLOAT 17
1055 #define OP_PUSH_IDENTIFIER 18
1056 #define OP_SEQUENCE 19
1057 #define OP_ASSIGN 20
1058 #define OP_ADDASSIGN 21
1059 #define OP_SUBASSIGN 22
1060 #define OP_MULASSIGN 23
1061 #define OP_DIVASSIGN 24
1062 /*#define OP_MODASSIGN 25*/
1063 /*#define OP_LSHASSIGN 26*/
1064 /*#define OP_RSHASSIGN 27*/
1065 /*#define OP_ORASSIGN 28*/
1066 /*#define OP_XORASSIGN 29*/
1067 /*#define OP_ANDASSIGN 30*/
1068 #define OP_SELECT 31
1069 #define OP_LOGICALOR 32
1070 #define OP_LOGICALXOR 33
1071 #define OP_LOGICALAND 34
1072 /*#define OP_BITOR 35*/
1073 /*#define OP_BITXOR 36*/
1074 /*#define OP_BITAND 37*/
1075 #define OP_EQUAL 38
1076 #define OP_NOTEQUAL 39
1077 #define OP_LESS 40
1078 #define OP_GREATER 41
1079 #define OP_LESSEQUAL 42
1080 #define OP_GREATEREQUAL 43
1081 /*#define OP_LSHIFT 44*/
1082 /*#define OP_RSHIFT 45*/
1083 #define OP_ADD 46
1084 #define OP_SUBTRACT 47
1085 #define OP_MULTIPLY 48
1086 #define OP_DIVIDE 49
1087 /*#define OP_MODULUS 50*/
1088 #define OP_PREINCREMENT 51
1089 #define OP_PREDECREMENT 52
1090 #define OP_PLUS 53
1091 #define OP_MINUS 54
1092 /*#define OP_COMPLEMENT 55*/
1093 #define OP_NOT 56
1094 #define OP_SUBSCRIPT 57
1095 #define OP_CALL 58
1096 #define OP_FIELD 59
1097 #define OP_POSTINCREMENT 60
1098 #define OP_POSTDECREMENT 61
1099 #define OP_PRECISION 62
1100 #define OP_METHOD 63
1101
1102
1103 /**
1104 * When parsing a compound production, this function is used to parse the
1105 * children.
1106 * For example, a while-loop compound will have two children, the
1107 * while condition expression and the loop body. So, this function will
1108 * be called twice to parse those two sub-expressions.
1109 * \param C the parsing context
1110 * \param O the output context
1111 * \param oper the operation we're parsing
1112 * \param statement indicates whether parsing a statement, or expression
1113 * \return 1 if success, 0 if error
1114 */
1115 static int
1116 parse_child_operation(slang_parse_ctx * C, slang_output_ctx * O,
1117 slang_operation * oper, GLboolean statement)
1118 {
1119 slang_operation *ch;
1120
1121 /* grow child array */
1122 ch = slang_operation_grow(&oper->num_children, &oper->children);
1123 if (statement)
1124 return parse_statement(C, O, ch);
1125 return parse_expression(C, O, ch);
1126 }
1127
1128 static int parse_declaration(slang_parse_ctx * C, slang_output_ctx * O);
1129
1130 static int
1131 parse_statement(slang_parse_ctx * C, slang_output_ctx * O,
1132 slang_operation * oper)
1133 {
1134 int op;
1135
1136 oper->locals->outer_scope = O->vars;
1137
1138 op = *C->I++;
1139 switch (op) {
1140 case OP_BLOCK_BEGIN_NO_NEW_SCOPE:
1141 /* parse child statements, do not create new variable scope */
1142 oper->type = SLANG_OPER_BLOCK_NO_NEW_SCOPE;
1143 while (*C->I != OP_END)
1144 if (!parse_child_operation(C, O, oper, GL_TRUE))
1145 RETURN0;
1146 C->I++;
1147 break;
1148 case OP_BLOCK_BEGIN_NEW_SCOPE:
1149 /* parse child statements, create new variable scope */
1150 {
1151 slang_output_ctx o = *O;
1152
1153 oper->type = SLANG_OPER_BLOCK_NEW_SCOPE;
1154 o.vars = oper->locals;
1155 while (*C->I != OP_END)
1156 if (!parse_child_operation(C, &o, oper, GL_TRUE))
1157 RETURN0;
1158 C->I++;
1159 }
1160 break;
1161 case OP_DECLARE:
1162 /* local variable declaration, individual declarators are stored as
1163 * children identifiers
1164 */
1165 oper->type = SLANG_OPER_BLOCK_NO_NEW_SCOPE;
1166 {
1167 const unsigned int first_var = O->vars->num_variables;
1168
1169 /* parse the declaration, note that there can be zero or more
1170 * than one declarators
1171 */
1172 if (!parse_declaration(C, O))
1173 RETURN0;
1174 if (first_var < O->vars->num_variables) {
1175 const unsigned int num_vars = O->vars->num_variables - first_var;
1176 unsigned int i;
1177 assert(oper->num_children == 0);
1178 oper->num_children = num_vars;
1179 oper->children = slang_operation_new(num_vars);
1180 if (oper->children == NULL) {
1181 slang_info_log_memory(C->L);
1182 RETURN0;
1183 }
1184 for (i = first_var; i < O->vars->num_variables; i++) {
1185 slang_operation *o = &oper->children[i - first_var];
1186 slang_variable *var = O->vars->variables[i];
1187 o->type = SLANG_OPER_VARIABLE_DECL;
1188 o->locals->outer_scope = O->vars;
1189 o->a_id = var->a_name;
1190
1191 /* new/someday...
1192 calculate_var_size(C, O, var);
1193 */
1194
1195 if (!legal_identifier(o->a_id)) {
1196 slang_info_log_error(C->L, "illegal variable name '%s'",
1197 (char *) o->a_id);
1198 RETURN0;
1199 }
1200 }
1201 }
1202 }
1203 break;
1204 case OP_ASM:
1205 /* the __asm statement, parse the mnemonic and all its arguments
1206 * as expressions
1207 */
1208 oper->type = SLANG_OPER_ASM;
1209 oper->a_id = parse_identifier(C);
1210 if (oper->a_id == SLANG_ATOM_NULL)
1211 RETURN0;
1212 while (*C->I != OP_END) {
1213 if (!parse_child_operation(C, O, oper, GL_FALSE))
1214 RETURN0;
1215 }
1216 C->I++;
1217 break;
1218 case OP_BREAK:
1219 oper->type = SLANG_OPER_BREAK;
1220 break;
1221 case OP_CONTINUE:
1222 oper->type = SLANG_OPER_CONTINUE;
1223 break;
1224 case OP_DISCARD:
1225 oper->type = SLANG_OPER_DISCARD;
1226 break;
1227 case OP_RETURN:
1228 oper->type = SLANG_OPER_RETURN;
1229 if (!parse_child_operation(C, O, oper, GL_FALSE))
1230 RETURN0;
1231 break;
1232 case OP_EXPRESSION:
1233 oper->type = SLANG_OPER_EXPRESSION;
1234 if (!parse_child_operation(C, O, oper, GL_FALSE))
1235 RETURN0;
1236 break;
1237 case OP_IF:
1238 oper->type = SLANG_OPER_IF;
1239 if (!parse_child_operation(C, O, oper, GL_FALSE))
1240 RETURN0;
1241 if (!parse_child_operation(C, O, oper, GL_TRUE))
1242 RETURN0;
1243 if (!parse_child_operation(C, O, oper, GL_TRUE))
1244 RETURN0;
1245 break;
1246 case OP_WHILE:
1247 {
1248 slang_output_ctx o = *O;
1249
1250 oper->type = SLANG_OPER_WHILE;
1251 o.vars = oper->locals;
1252 if (!parse_child_operation(C, &o, oper, GL_TRUE))
1253 RETURN0;
1254 if (!parse_child_operation(C, &o, oper, GL_TRUE))
1255 RETURN0;
1256 }
1257 break;
1258 case OP_DO:
1259 oper->type = SLANG_OPER_DO;
1260 if (!parse_child_operation(C, O, oper, GL_TRUE))
1261 RETURN0;
1262 if (!parse_child_operation(C, O, oper, GL_FALSE))
1263 RETURN0;
1264 break;
1265 case OP_FOR:
1266 {
1267 slang_output_ctx o = *O;
1268
1269 oper->type = SLANG_OPER_FOR;
1270 o.vars = oper->locals;
1271 if (!parse_child_operation(C, &o, oper, GL_TRUE))
1272 RETURN0;
1273 if (!parse_child_operation(C, &o, oper, GL_TRUE))
1274 RETURN0;
1275 if (!parse_child_operation(C, &o, oper, GL_FALSE))
1276 RETURN0;
1277 if (!parse_child_operation(C, &o, oper, GL_TRUE))
1278 RETURN0;
1279 }
1280 break;
1281 case OP_PRECISION:
1282 {
1283 /* set default precision for a type in this scope */
1284 /* ignored at this time */
1285 int prec_qual = *C->I++;
1286 int datatype = *C->I++;
1287 (void) prec_qual;
1288 (void) datatype;
1289 }
1290 break;
1291 default:
1292 /*printf("Unexpected operation %d\n", op);*/
1293 RETURN0;
1294 }
1295 return 1;
1296 }
1297
1298 static int
1299 handle_nary_expression(slang_parse_ctx * C, slang_operation * op,
1300 slang_operation ** ops, unsigned int *total_ops,
1301 unsigned int n)
1302 {
1303 unsigned int i;
1304
1305 op->children = slang_operation_new(n);
1306 if (op->children == NULL) {
1307 slang_info_log_memory(C->L);
1308 RETURN0;
1309 }
1310 op->num_children = n;
1311
1312 for (i = 0; i < n; i++) {
1313 slang_operation_destruct(&op->children[i]);
1314 op->children[i] = (*ops)[*total_ops - (n + 1 - i)];
1315 }
1316
1317 (*ops)[*total_ops - (n + 1)] = (*ops)[*total_ops - 1];
1318 *total_ops -= n;
1319
1320 *ops = (slang_operation *)
1321 _slang_realloc(*ops,
1322 (*total_ops + n) * sizeof(slang_operation),
1323 *total_ops * sizeof(slang_operation));
1324 if (*ops == NULL) {
1325 slang_info_log_memory(C->L);
1326 RETURN0;
1327 }
1328 return 1;
1329 }
1330
1331 static int
1332 is_constructor_name(const char *name, slang_atom a_name,
1333 slang_struct_scope * structs)
1334 {
1335 if (slang_type_specifier_type_from_string(name) != SLANG_SPEC_VOID)
1336 return 1;
1337 return slang_struct_scope_find(structs, a_name, 1) != NULL;
1338 }
1339
1340 #define FUNCTION_CALL_NONARRAY 0
1341 #define FUNCTION_CALL_ARRAY 1
1342
1343 static int
1344 parse_expression(slang_parse_ctx * C, slang_output_ctx * O,
1345 slang_operation * oper)
1346 {
1347 slang_operation *ops = NULL;
1348 unsigned int num_ops = 0;
1349 int number;
1350
1351 while (*C->I != OP_END) {
1352 slang_operation *op;
1353 const unsigned int op_code = *C->I++;
1354
1355 /* allocate default operation, becomes a no-op if not used */
1356 ops = (slang_operation *)
1357 _slang_realloc(ops,
1358 num_ops * sizeof(slang_operation),
1359 (num_ops + 1) * sizeof(slang_operation));
1360 if (ops == NULL) {
1361 slang_info_log_memory(C->L);
1362 RETURN0;
1363 }
1364 op = &ops[num_ops];
1365 if (!slang_operation_construct(op)) {
1366 slang_info_log_memory(C->L);
1367 RETURN0;
1368 }
1369 num_ops++;
1370 op->locals->outer_scope = O->vars;
1371
1372 switch (op_code) {
1373 case OP_PUSH_VOID:
1374 op->type = SLANG_OPER_VOID;
1375 break;
1376 case OP_PUSH_BOOL:
1377 op->type = SLANG_OPER_LITERAL_BOOL;
1378 if (!parse_number(C, &number))
1379 RETURN0;
1380 op->literal[0] =
1381 op->literal[1] =
1382 op->literal[2] =
1383 op->literal[3] = (GLfloat) number;
1384 op->literal_size = 1;
1385 break;
1386 case OP_PUSH_INT:
1387 op->type = SLANG_OPER_LITERAL_INT;
1388 if (!parse_number(C, &number))
1389 RETURN0;
1390 op->literal[0] =
1391 op->literal[1] =
1392 op->literal[2] =
1393 op->literal[3] = (GLfloat) number;
1394 op->literal_size = 1;
1395 break;
1396 case OP_PUSH_FLOAT:
1397 op->type = SLANG_OPER_LITERAL_FLOAT;
1398 if (!parse_float(C, &op->literal[0]))
1399 RETURN0;
1400 op->literal[1] =
1401 op->literal[2] =
1402 op->literal[3] = op->literal[0];
1403 op->literal_size = 1;
1404 break;
1405 case OP_PUSH_IDENTIFIER:
1406 op->type = SLANG_OPER_IDENTIFIER;
1407 op->a_id = parse_identifier(C);
1408 if (op->a_id == SLANG_ATOM_NULL)
1409 RETURN0;
1410 break;
1411 case OP_SEQUENCE:
1412 op->type = SLANG_OPER_SEQUENCE;
1413 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1414 RETURN0;
1415 break;
1416 case OP_ASSIGN:
1417 op->type = SLANG_OPER_ASSIGN;
1418 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1419 RETURN0;
1420 break;
1421 case OP_ADDASSIGN:
1422 op->type = SLANG_OPER_ADDASSIGN;
1423 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1424 RETURN0;
1425 break;
1426 case OP_SUBASSIGN:
1427 op->type = SLANG_OPER_SUBASSIGN;
1428 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1429 RETURN0;
1430 break;
1431 case OP_MULASSIGN:
1432 op->type = SLANG_OPER_MULASSIGN;
1433 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1434 RETURN0;
1435 break;
1436 case OP_DIVASSIGN:
1437 op->type = SLANG_OPER_DIVASSIGN;
1438 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1439 RETURN0;
1440 break;
1441 /*case OP_MODASSIGN: */
1442 /*case OP_LSHASSIGN: */
1443 /*case OP_RSHASSIGN: */
1444 /*case OP_ORASSIGN: */
1445 /*case OP_XORASSIGN: */
1446 /*case OP_ANDASSIGN: */
1447 case OP_SELECT:
1448 op->type = SLANG_OPER_SELECT;
1449 if (!handle_nary_expression(C, op, &ops, &num_ops, 3))
1450 RETURN0;
1451 break;
1452 case OP_LOGICALOR:
1453 op->type = SLANG_OPER_LOGICALOR;
1454 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1455 RETURN0;
1456 break;
1457 case OP_LOGICALXOR:
1458 op->type = SLANG_OPER_LOGICALXOR;
1459 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1460 RETURN0;
1461 break;
1462 case OP_LOGICALAND:
1463 op->type = SLANG_OPER_LOGICALAND;
1464 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1465 RETURN0;
1466 break;
1467 /*case OP_BITOR: */
1468 /*case OP_BITXOR: */
1469 /*case OP_BITAND: */
1470 case OP_EQUAL:
1471 op->type = SLANG_OPER_EQUAL;
1472 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1473 RETURN0;
1474 break;
1475 case OP_NOTEQUAL:
1476 op->type = SLANG_OPER_NOTEQUAL;
1477 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1478 RETURN0;
1479 break;
1480 case OP_LESS:
1481 op->type = SLANG_OPER_LESS;
1482 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1483 RETURN0;
1484 break;
1485 case OP_GREATER:
1486 op->type = SLANG_OPER_GREATER;
1487 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1488 RETURN0;
1489 break;
1490 case OP_LESSEQUAL:
1491 op->type = SLANG_OPER_LESSEQUAL;
1492 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1493 RETURN0;
1494 break;
1495 case OP_GREATEREQUAL:
1496 op->type = SLANG_OPER_GREATEREQUAL;
1497 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1498 RETURN0;
1499 break;
1500 /*case OP_LSHIFT: */
1501 /*case OP_RSHIFT: */
1502 case OP_ADD:
1503 op->type = SLANG_OPER_ADD;
1504 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1505 RETURN0;
1506 break;
1507 case OP_SUBTRACT:
1508 op->type = SLANG_OPER_SUBTRACT;
1509 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1510 RETURN0;
1511 break;
1512 case OP_MULTIPLY:
1513 op->type = SLANG_OPER_MULTIPLY;
1514 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1515 RETURN0;
1516 break;
1517 case OP_DIVIDE:
1518 op->type = SLANG_OPER_DIVIDE;
1519 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1520 RETURN0;
1521 break;
1522 /*case OP_MODULUS: */
1523 case OP_PREINCREMENT:
1524 op->type = SLANG_OPER_PREINCREMENT;
1525 if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
1526 RETURN0;
1527 break;
1528 case OP_PREDECREMENT:
1529 op->type = SLANG_OPER_PREDECREMENT;
1530 if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
1531 RETURN0;
1532 break;
1533 case OP_PLUS:
1534 op->type = SLANG_OPER_PLUS;
1535 if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
1536 RETURN0;
1537 break;
1538 case OP_MINUS:
1539 op->type = SLANG_OPER_MINUS;
1540 if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
1541 RETURN0;
1542 break;
1543 case OP_NOT:
1544 op->type = SLANG_OPER_NOT;
1545 if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
1546 RETURN0;
1547 break;
1548 /*case OP_COMPLEMENT: */
1549 case OP_SUBSCRIPT:
1550 op->type = SLANG_OPER_SUBSCRIPT;
1551 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1552 RETURN0;
1553 break;
1554 case OP_METHOD:
1555 op->type = SLANG_OPER_METHOD;
1556 op->a_obj = parse_identifier(C);
1557 if (op->a_obj == SLANG_ATOM_NULL)
1558 RETURN0;
1559
1560 op->a_id = parse_identifier(C);
1561 if (op->a_id == SLANG_ATOM_NULL)
1562 RETURN0;
1563
1564 assert(*C->I == OP_END);
1565 C->I++;
1566
1567 while (*C->I != OP_END)
1568 if (!parse_child_operation(C, O, op, GL_FALSE))
1569 RETURN0;
1570 C->I++;
1571 #if 0
1572 /* don't lookup the method (not yet anyway) */
1573 if (!C->parsing_builtin
1574 && !slang_function_scope_find_by_name(O->funs, op->a_id, 1)) {
1575 const char *id;
1576
1577 id = slang_atom_pool_id(C->atoms, op->a_id);
1578 if (!is_constructor_name(id, op->a_id, O->structs)) {
1579 slang_info_log_error(C->L, "%s: undeclared function name.", id);
1580 RETURN0;
1581 }
1582 }
1583 #endif
1584 break;
1585 case OP_CALL:
1586 {
1587 GLboolean array_constructor = GL_FALSE;
1588 GLint array_constructor_size = 0;
1589
1590 op->type = SLANG_OPER_CALL;
1591 op->a_id = parse_identifier(C);
1592 if (op->a_id == SLANG_ATOM_NULL)
1593 RETURN0;
1594 switch (*C->I++) {
1595 case FUNCTION_CALL_NONARRAY:
1596 /* Nothing to do. */
1597 break;
1598 case FUNCTION_CALL_ARRAY:
1599 /* Calling an array constructor. For example:
1600 * float[3](1.1, 2.2, 3.3);
1601 */
1602 if (!O->allow_array_types) {
1603 slang_info_log_error(C->L,
1604 "array constructors not allowed "
1605 "in this GLSL version");
1606 RETURN0;
1607 }
1608 else {
1609 /* parse the array constructor size */
1610 slang_operation array_size;
1611 array_constructor = GL_TRUE;
1612 slang_operation_construct(&array_size);
1613 if (!parse_expression(C, O, &array_size)) {
1614 slang_operation_destruct(&array_size);
1615 return GL_FALSE;
1616 }
1617 if (array_size.type != SLANG_OPER_LITERAL_INT) {
1618 slang_info_log_error(C->L,
1619 "constructor array size is not an integer");
1620 slang_operation_destruct(&array_size);
1621 RETURN0;
1622 }
1623 array_constructor_size = (int) array_size.literal[0];
1624 op->array_constructor = GL_TRUE;
1625 slang_operation_destruct(&array_size);
1626 }
1627 break;
1628 default:
1629 assert(0);
1630 RETURN0;
1631 }
1632 while (*C->I != OP_END)
1633 if (!parse_child_operation(C, O, op, GL_FALSE))
1634 RETURN0;
1635 C->I++;
1636
1637 if (array_constructor &&
1638 array_constructor_size != op->num_children) {
1639 slang_info_log_error(C->L, "number of parameters to array"
1640 " constructor does not match array size");
1641 RETURN0;
1642 }
1643
1644 if (!C->parsing_builtin
1645 && !slang_function_scope_find_by_name(O->funs, op->a_id, 1)) {
1646 const char *id;
1647
1648 id = slang_atom_pool_id(C->atoms, op->a_id);
1649 if (!is_constructor_name(id, op->a_id, O->structs)) {
1650 slang_info_log_error(C->L, "%s: undeclared function name.", id);
1651 RETURN0;
1652 }
1653 }
1654 }
1655 break;
1656 case OP_FIELD:
1657 op->type = SLANG_OPER_FIELD;
1658 op->a_id = parse_identifier(C);
1659 if (op->a_id == SLANG_ATOM_NULL)
1660 RETURN0;
1661 if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
1662 RETURN0;
1663 break;
1664 case OP_POSTINCREMENT:
1665 op->type = SLANG_OPER_POSTINCREMENT;
1666 if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
1667 RETURN0;
1668 break;
1669 case OP_POSTDECREMENT:
1670 op->type = SLANG_OPER_POSTDECREMENT;
1671 if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
1672 RETURN0;
1673 break;
1674 default:
1675 RETURN0;
1676 }
1677 }
1678 C->I++;
1679
1680 slang_operation_destruct(oper);
1681 *oper = *ops; /* struct copy */
1682 _slang_free(ops);
1683
1684 return 1;
1685 }
1686
1687 /* parameter qualifier */
1688 #define PARAM_QUALIFIER_IN 0
1689 #define PARAM_QUALIFIER_OUT 1
1690 #define PARAM_QUALIFIER_INOUT 2
1691
1692 /* function parameter array presence */
1693 #define PARAMETER_ARRAY_NOT_PRESENT 0
1694 #define PARAMETER_ARRAY_PRESENT 1
1695
1696 static int
1697 parse_parameter_declaration(slang_parse_ctx * C, slang_output_ctx * O,
1698 slang_variable * param)
1699 {
1700 int param_qual, precision_qual;
1701
1702 /* parse and validate the parameter's type qualifiers (there can be
1703 * two at most) because not all combinations are valid
1704 */
1705 if (!parse_type_qualifier(C, &param->type.qualifier))
1706 RETURN0;
1707
1708 param_qual = *C->I++;
1709 switch (param_qual) {
1710 case PARAM_QUALIFIER_IN:
1711 if (param->type.qualifier != SLANG_QUAL_CONST
1712 && param->type.qualifier != SLANG_QUAL_NONE) {
1713 slang_info_log_error(C->L, "Invalid type qualifier.");
1714 RETURN0;
1715 }
1716 break;
1717 case PARAM_QUALIFIER_OUT:
1718 if (param->type.qualifier == SLANG_QUAL_NONE)
1719 param->type.qualifier = SLANG_QUAL_OUT;
1720 else {
1721 slang_info_log_error(C->L, "Invalid type qualifier.");
1722 RETURN0;
1723 }
1724 break;
1725 case PARAM_QUALIFIER_INOUT:
1726 if (param->type.qualifier == SLANG_QUAL_NONE)
1727 param->type.qualifier = SLANG_QUAL_INOUT;
1728 else {
1729 slang_info_log_error(C->L, "Invalid type qualifier.");
1730 RETURN0;
1731 }
1732 break;
1733 default:
1734 RETURN0;
1735 }
1736
1737 /* parse precision qualifier (lowp, mediump, highp */
1738 precision_qual = *C->I++;
1739 /* ignored at this time */
1740 (void) precision_qual;
1741
1742 /* parse parameter's type specifier and name */
1743 if (!parse_type_specifier(C, O, &param->type.specifier))
1744 RETURN0;
1745 if (!parse_type_array_size(C, O, &param->type.array_len))
1746 RETURN0;
1747 param->a_name = parse_identifier(C);
1748 if (param->a_name == SLANG_ATOM_NULL)
1749 RETURN0;
1750
1751 /* first-class array
1752 */
1753 if (param->type.array_len >= 0) {
1754 slang_type_specifier p;
1755
1756 slang_type_specifier_ctr(&p);
1757 if (!slang_type_specifier_copy(&p, &param->type.specifier)) {
1758 slang_type_specifier_dtr(&p);
1759 RETURN0;
1760 }
1761 if (!convert_to_array(C, param, &p)) {
1762 slang_type_specifier_dtr(&p);
1763 RETURN0;
1764 }
1765 slang_type_specifier_dtr(&p);
1766 param->array_len = param->type.array_len;
1767 }
1768
1769 /* if the parameter is an array, parse its size (the size must be
1770 * explicitly defined
1771 */
1772 if (*C->I++ == PARAMETER_ARRAY_PRESENT) {
1773 slang_type_specifier p;
1774
1775 if (param->type.array_len >= 0) {
1776 slang_info_log_error(C->L, "multi-dimensional arrays not allowed");
1777 RETURN0;
1778 }
1779 slang_type_specifier_ctr(&p);
1780 if (!slang_type_specifier_copy(&p, &param->type.specifier)) {
1781 slang_type_specifier_dtr(&p);
1782 RETURN0;
1783 }
1784 if (!convert_to_array(C, param, &p)) {
1785 slang_type_specifier_dtr(&p);
1786 RETURN0;
1787 }
1788 slang_type_specifier_dtr(&p);
1789 if (!parse_array_len(C, O, &param->array_len))
1790 RETURN0;
1791 }
1792
1793 #if 0
1794 /* calculate the parameter size */
1795 if (!calculate_var_size(C, O, param))
1796 RETURN0;
1797 #endif
1798 /* TODO: allocate the local address here? */
1799 return 1;
1800 }
1801
1802 /* function type */
1803 #define FUNCTION_ORDINARY 0
1804 #define FUNCTION_CONSTRUCTOR 1
1805 #define FUNCTION_OPERATOR 2
1806
1807 /* function parameter */
1808 #define PARAMETER_NONE 0
1809 #define PARAMETER_NEXT 1
1810
1811 /* operator type */
1812 #define OPERATOR_ADDASSIGN 1
1813 #define OPERATOR_SUBASSIGN 2
1814 #define OPERATOR_MULASSIGN 3
1815 #define OPERATOR_DIVASSIGN 4
1816 /*#define OPERATOR_MODASSIGN 5*/
1817 /*#define OPERATOR_LSHASSIGN 6*/
1818 /*#define OPERATOR_RSHASSIGN 7*/
1819 /*#define OPERATOR_ANDASSIGN 8*/
1820 /*#define OPERATOR_XORASSIGN 9*/
1821 /*#define OPERATOR_ORASSIGN 10*/
1822 #define OPERATOR_LOGICALXOR 11
1823 /*#define OPERATOR_BITOR 12*/
1824 /*#define OPERATOR_BITXOR 13*/
1825 /*#define OPERATOR_BITAND 14*/
1826 #define OPERATOR_LESS 15
1827 #define OPERATOR_GREATER 16
1828 #define OPERATOR_LESSEQUAL 17
1829 #define OPERATOR_GREATEREQUAL 18
1830 /*#define OPERATOR_LSHIFT 19*/
1831 /*#define OPERATOR_RSHIFT 20*/
1832 #define OPERATOR_MULTIPLY 21
1833 #define OPERATOR_DIVIDE 22
1834 /*#define OPERATOR_MODULUS 23*/
1835 #define OPERATOR_INCREMENT 24
1836 #define OPERATOR_DECREMENT 25
1837 #define OPERATOR_PLUS 26
1838 #define OPERATOR_MINUS 27
1839 /*#define OPERATOR_COMPLEMENT 28*/
1840 #define OPERATOR_NOT 29
1841
1842 static const struct
1843 {
1844 unsigned int o_code;
1845 const char *o_name;
1846 } operator_names[] = {
1847 {OPERATOR_INCREMENT, "++"},
1848 {OPERATOR_ADDASSIGN, "+="},
1849 {OPERATOR_PLUS, "+"},
1850 {OPERATOR_DECREMENT, "--"},
1851 {OPERATOR_SUBASSIGN, "-="},
1852 {OPERATOR_MINUS, "-"},
1853 {OPERATOR_NOT, "!"},
1854 {OPERATOR_MULASSIGN, "*="},
1855 {OPERATOR_MULTIPLY, "*"},
1856 {OPERATOR_DIVASSIGN, "/="},
1857 {OPERATOR_DIVIDE, "/"},
1858 {OPERATOR_LESSEQUAL, "<="},
1859 /*{ OPERATOR_LSHASSIGN, "<<=" }, */
1860 /*{ OPERATOR_LSHIFT, "<<" }, */
1861 {OPERATOR_LESS, "<"},
1862 {OPERATOR_GREATEREQUAL, ">="},
1863 /*{ OPERATOR_RSHASSIGN, ">>=" }, */
1864 /*{ OPERATOR_RSHIFT, ">>" }, */
1865 {OPERATOR_GREATER, ">"},
1866 /*{ OPERATOR_MODASSIGN, "%=" }, */
1867 /*{ OPERATOR_MODULUS, "%" }, */
1868 /*{ OPERATOR_ANDASSIGN, "&=" }, */
1869 /*{ OPERATOR_BITAND, "&" }, */
1870 /*{ OPERATOR_ORASSIGN, "|=" }, */
1871 /*{ OPERATOR_BITOR, "|" }, */
1872 /*{ OPERATOR_COMPLEMENT, "~" }, */
1873 /*{ OPERATOR_XORASSIGN, "^=" }, */
1874 {OPERATOR_LOGICALXOR, "^^"},
1875 /*{ OPERATOR_BITXOR, "^" } */
1876 };
1877
1878 static slang_atom
1879 parse_operator_name(slang_parse_ctx * C)
1880 {
1881 unsigned int i;
1882
1883 for (i = 0; i < sizeof(operator_names) / sizeof(*operator_names); i++) {
1884 if (operator_names[i].o_code == (unsigned int) (*C->I)) {
1885 slang_atom atom =
1886 slang_atom_pool_atom(C->atoms, operator_names[i].o_name);
1887 if (atom == SLANG_ATOM_NULL) {
1888 slang_info_log_memory(C->L);
1889 RETURN0;
1890 }
1891 C->I++;
1892 return atom;
1893 }
1894 }
1895 RETURN0;
1896 }
1897
1898
1899 static int
1900 parse_function_prototype(slang_parse_ctx * C, slang_output_ctx * O,
1901 slang_function * func)
1902 {
1903 GLuint functype;
1904 /* parse function type and name */
1905 if (!parse_fully_specified_type(C, O, &func->header.type))
1906 RETURN0;
1907
1908 functype = *C->I++;
1909 switch (functype) {
1910 case FUNCTION_ORDINARY:
1911 func->kind = SLANG_FUNC_ORDINARY;
1912 func->header.a_name = parse_identifier(C);
1913 if (func->header.a_name == SLANG_ATOM_NULL)
1914 RETURN0;
1915 break;
1916 case FUNCTION_CONSTRUCTOR:
1917 func->kind = SLANG_FUNC_CONSTRUCTOR;
1918 if (func->header.type.specifier.type == SLANG_SPEC_STRUCT)
1919 RETURN0;
1920 func->header.a_name =
1921 slang_atom_pool_atom(C->atoms,
1922 slang_type_specifier_type_to_string
1923 (func->header.type.specifier.type));
1924 if (func->header.a_name == SLANG_ATOM_NULL) {
1925 slang_info_log_memory(C->L);
1926 RETURN0;
1927 }
1928 break;
1929 case FUNCTION_OPERATOR:
1930 func->kind = SLANG_FUNC_OPERATOR;
1931 func->header.a_name = parse_operator_name(C);
1932 if (func->header.a_name == SLANG_ATOM_NULL)
1933 RETURN0;
1934 break;
1935 default:
1936 RETURN0;
1937 }
1938
1939 if (!legal_identifier(func->header.a_name)) {
1940 slang_info_log_error(C->L, "illegal function name '%s'",
1941 (char *) func->header.a_name);
1942 RETURN0;
1943 }
1944
1945 /* parse function parameters */
1946 while (*C->I++ == PARAMETER_NEXT) {
1947 slang_variable *p = slang_variable_scope_grow(func->parameters);
1948 if (!p) {
1949 slang_info_log_memory(C->L);
1950 RETURN0;
1951 }
1952 if (!parse_parameter_declaration(C, O, p))
1953 RETURN0;
1954 }
1955
1956 /* if the function returns a value, append a hidden __retVal 'out'
1957 * parameter that corresponds to the return value.
1958 */
1959 if (_slang_function_has_return_value(func)) {
1960 slang_variable *p = slang_variable_scope_grow(func->parameters);
1961 slang_atom a_retVal = slang_atom_pool_atom(C->atoms, "__retVal");
1962 assert(a_retVal);
1963 p->a_name = a_retVal;
1964 p->type = func->header.type;
1965 p->type.qualifier = SLANG_QUAL_OUT;
1966 }
1967
1968 /* function formal parameters and local variables share the same
1969 * scope, so save the information about param count in a seperate
1970 * place also link the scope to the global variable scope so when a
1971 * given identifier is not found here, the search process continues
1972 * in the global space
1973 */
1974 func->param_count = func->parameters->num_variables;
1975 func->parameters->outer_scope = O->vars;
1976
1977 return 1;
1978 }
1979
1980 static int
1981 parse_function_definition(slang_parse_ctx * C, slang_output_ctx * O,
1982 slang_function * func)
1983 {
1984 slang_output_ctx o = *O;
1985
1986 if (!parse_function_prototype(C, O, func))
1987 RETURN0;
1988
1989 /* create function's body operation */
1990 func->body = (slang_operation *) _slang_alloc(sizeof(slang_operation));
1991 if (func->body == NULL) {
1992 slang_info_log_memory(C->L);
1993 RETURN0;
1994 }
1995 if (!slang_operation_construct(func->body)) {
1996 _slang_free(func->body);
1997 func->body = NULL;
1998 slang_info_log_memory(C->L);
1999 RETURN0;
2000 }
2001
2002 /* to parse the body the parse context is modified in order to
2003 * capture parsed variables into function's local variable scope
2004 */
2005 C->global_scope = GL_FALSE;
2006 o.vars = func->parameters;
2007 if (!parse_statement(C, &o, func->body))
2008 RETURN0;
2009
2010 C->global_scope = GL_TRUE;
2011 return 1;
2012 }
2013
2014 static GLboolean
2015 initialize_global(slang_assemble_ctx * A, slang_variable * var)
2016 {
2017 slang_operation op_id, op_assign;
2018 GLboolean result;
2019
2020 /* construct the left side of assignment */
2021 if (!slang_operation_construct(&op_id))
2022 return GL_FALSE;
2023 op_id.type = SLANG_OPER_IDENTIFIER;
2024 op_id.a_id = var->a_name;
2025
2026 /* put the variable into operation's scope */
2027 op_id.locals->variables =
2028 (slang_variable **) _slang_alloc(sizeof(slang_variable *));
2029 if (op_id.locals->variables == NULL) {
2030 slang_operation_destruct(&op_id);
2031 return GL_FALSE;
2032 }
2033 op_id.locals->num_variables = 1;
2034 op_id.locals->variables[0] = var;
2035
2036 /* construct the assignment expression */
2037 if (!slang_operation_construct(&op_assign)) {
2038 op_id.locals->num_variables = 0;
2039 slang_operation_destruct(&op_id);
2040 return GL_FALSE;
2041 }
2042 op_assign.type = SLANG_OPER_ASSIGN;
2043 op_assign.children =
2044 (slang_operation *) _slang_alloc(2 * sizeof(slang_operation));
2045 if (op_assign.children == NULL) {
2046 slang_operation_destruct(&op_assign);
2047 op_id.locals->num_variables = 0;
2048 slang_operation_destruct(&op_id);
2049 return GL_FALSE;
2050 }
2051 op_assign.num_children = 2;
2052 op_assign.children[0] = op_id;
2053 op_assign.children[1] = *var->initializer;
2054
2055 result = 1;
2056
2057 /* carefully destroy the operations */
2058 op_assign.num_children = 0;
2059 _slang_free(op_assign.children);
2060 op_assign.children = NULL;
2061 slang_operation_destruct(&op_assign);
2062 op_id.locals->num_variables = 0;
2063 slang_operation_destruct(&op_id);
2064
2065 if (!result)
2066 return GL_FALSE;
2067
2068 return GL_TRUE;
2069 }
2070
2071 /* init declarator list */
2072 #define DECLARATOR_NONE 0
2073 #define DECLARATOR_NEXT 1
2074
2075 /* variable declaration */
2076 #define VARIABLE_NONE 0
2077 #define VARIABLE_IDENTIFIER 1
2078 #define VARIABLE_INITIALIZER 2
2079 #define VARIABLE_ARRAY_EXPLICIT 3
2080 #define VARIABLE_ARRAY_UNKNOWN 4
2081
2082
2083 /**
2084 * Check if it's OK to re-declare a variable with the given new type.
2085 * This happens when applying layout qualifiers to gl_FragCoord or
2086 * (re)setting an array size.
2087 * If redeclaration is OK, return a pointer to the incoming variable
2088 * updated with new type info. Else return NULL;
2089 */
2090 static slang_variable *
2091 redeclare_variable(slang_variable *var,
2092 const slang_fully_specified_type *type)
2093 {
2094 if (slang_fully_specified_types_compatible(&var->type, type)) {
2095 /* replace orig var layout with new layout */
2096 var->type.layout = type->layout;
2097
2098 /* XXX there may be other type updates in the future here */
2099
2100 return var;
2101 }
2102 else
2103 return NULL;
2104 }
2105
2106
2107 /**
2108 * Parse the initializer for a variable declaration.
2109 */
2110 static int
2111 parse_init_declarator(slang_parse_ctx * C, slang_output_ctx * O,
2112 const slang_fully_specified_type * type)
2113 {
2114 GET_CURRENT_CONTEXT(ctx); /* a hack */
2115 slang_variable *var = NULL, *prevDecl;
2116 slang_atom a_name;
2117
2118 /* empty init declatator (without name, e.g. "float ;") */
2119 if (*C->I++ == VARIABLE_NONE)
2120 return 1;
2121
2122 a_name = parse_identifier(C);
2123
2124 /* check if name is already in this scope */
2125 prevDecl = _slang_variable_locate(O->vars, a_name, C->global_scope);
2126 if (prevDecl) {
2127 /* A var with this name has already been declared.
2128 * Check if redeclaring the var with a different type/layout is legal.
2129 */
2130 if (C->global_scope) {
2131 var = redeclare_variable(prevDecl, type);
2132 }
2133 if (!var) {
2134 slang_info_log_error(C->L,
2135 "declaration of '%s' conflicts with previous declaration",
2136 (char *) a_name);
2137 RETURN0;
2138 }
2139 }
2140
2141 if (!var) {
2142 /* make room for a new variable and initialize it */
2143 var = slang_variable_scope_grow(O->vars);
2144 if (!var) {
2145 slang_info_log_memory(C->L);
2146 RETURN0;
2147 }
2148
2149 /* copy the declarator type qualifier/etc info, parse the identifier */
2150 var->type.qualifier = type->qualifier;
2151 var->type.centroid = type->centroid;
2152 var->type.precision = type->precision;
2153 var->type.specifier = type->specifier;/*new*/
2154 var->type.variant = type->variant;
2155 var->type.layout = type->layout;
2156 var->type.array_len = type->array_len;
2157 var->a_name = a_name;
2158 if (var->a_name == SLANG_ATOM_NULL)
2159 RETURN0;
2160 }
2161
2162 switch (*C->I++) {
2163 case VARIABLE_NONE:
2164 /* simple variable declarator - just copy the specifier */
2165 if (!slang_type_specifier_copy(&var->type.specifier, &type->specifier))
2166 RETURN0;
2167 break;
2168 case VARIABLE_INITIALIZER:
2169 /* initialized variable - copy the specifier and parse the expression */
2170 if (0 && type->array_len >= 0) {
2171 /* The type was something like "float[4]" */
2172 convert_to_array(C, var, &type->specifier);
2173 var->array_len = type->array_len;
2174 }
2175 else {
2176 if (!slang_type_specifier_copy(&var->type.specifier, &type->specifier))
2177 RETURN0;
2178 }
2179 var->initializer =
2180 (slang_operation *) _slang_alloc(sizeof(slang_operation));
2181 if (var->initializer == NULL) {
2182 slang_info_log_memory(C->L);
2183 RETURN0;
2184 }
2185 if (!slang_operation_construct(var->initializer)) {
2186 _slang_free(var->initializer);
2187 var->initializer = NULL;
2188 slang_info_log_memory(C->L);
2189 RETURN0;
2190 }
2191 if (!parse_expression(C, O, var->initializer))
2192 RETURN0;
2193 break;
2194 case VARIABLE_ARRAY_UNKNOWN:
2195 /* unsized array - mark it as array and copy the specifier to
2196 * the array element
2197 */
2198 if (type->array_len >= 0) {
2199 slang_info_log_error(C->L, "multi-dimensional arrays not allowed");
2200 RETURN0;
2201 }
2202 if (!convert_to_array(C, var, &type->specifier))
2203 return GL_FALSE;
2204 break;
2205 case VARIABLE_ARRAY_EXPLICIT:
2206 if (type->array_len >= 0) {
2207 /* the user is trying to do something like: float[2] x[3]; */
2208 slang_info_log_error(C->L, "multi-dimensional arrays not allowed");
2209 RETURN0;
2210 }
2211 if (!convert_to_array(C, var, &type->specifier))
2212 return GL_FALSE;
2213 if (!parse_array_len(C, O, &var->array_len))
2214 return GL_FALSE;
2215 break;
2216 default:
2217 RETURN0;
2218 }
2219
2220 /* allocate global address space for a variable with a known size */
2221 if (C->global_scope
2222 && !(var->type.specifier.type == SLANG_SPEC_ARRAY
2223 && var->array_len == 0)) {
2224 if (!calculate_var_size(C, O, var))
2225 return GL_FALSE;
2226 }
2227
2228 /* emit code for global var decl */
2229 if (C->global_scope) {
2230 slang_assemble_ctx A;
2231 memset(&A, 0, sizeof(slang_assemble_ctx));
2232 A.allow_uniform_initializers = C->version > 110;
2233 A.atoms = C->atoms;
2234 A.space.funcs = O->funs;
2235 A.space.structs = O->structs;
2236 A.space.vars = O->vars;
2237 A.program = O->program;
2238 A.pragmas = O->pragmas;
2239 A.vartable = O->vartable;
2240 A.log = C->L;
2241 A.curFuncEndLabel = NULL;
2242 A.EmitContReturn = ctx->Shader.EmitContReturn;
2243 if (!_slang_codegen_global_variable(&A, var, C->type))
2244 RETURN0;
2245 }
2246
2247 /* initialize global variable */
2248 if (C->global_scope) {
2249 if (var->initializer != NULL) {
2250 slang_assemble_ctx A;
2251 memset(&A, 0, sizeof(slang_assemble_ctx));
2252 A.allow_uniform_initializers = C->version > 110;
2253 A.atoms = C->atoms;
2254 A.space.funcs = O->funs;
2255 A.space.structs = O->structs;
2256 A.space.vars = O->vars;
2257 if (!initialize_global(&A, var))
2258 RETURN0;
2259 }
2260 }
2261
2262 if (var->type.qualifier == SLANG_QUAL_FIXEDINPUT &&
2263 var->a_name == slang_atom_pool_atom(C->atoms, "gl_FragCoord")) {
2264 /* set the program's PixelCenterInteger, OriginUpperLeft fields */
2265 struct gl_fragment_program *fragProg =
2266 (struct gl_fragment_program *) O->program;
2267
2268 if (var->type.layout & SLANG_LAYOUT_UPPER_LEFT_BIT) {
2269 fragProg->OriginUpperLeft = GL_TRUE;
2270 }
2271 if (var->type.layout & SLANG_LAYOUT_PIXEL_CENTER_INTEGER_BIT) {
2272 fragProg->PixelCenterInteger = GL_TRUE;
2273 }
2274 }
2275
2276 return 1;
2277 }
2278
2279 /**
2280 * Parse a list of variable declarations. Each variable may have an
2281 * initializer.
2282 */
2283 static int
2284 parse_init_declarator_list(slang_parse_ctx * C, slang_output_ctx * O)
2285 {
2286 slang_fully_specified_type type;
2287
2288 /* parse the fully specified type, common to all declarators */
2289 if (!slang_fully_specified_type_construct(&type))
2290 RETURN0;
2291 if (!parse_fully_specified_type(C, O, &type)) {
2292 slang_fully_specified_type_destruct(&type);
2293 RETURN0;
2294 }
2295
2296 /* parse declarators, pass-in the parsed type */
2297 do {
2298 if (!parse_init_declarator(C, O, &type)) {
2299 slang_fully_specified_type_destruct(&type);
2300 RETURN0;
2301 }
2302 }
2303 while (*C->I++ == DECLARATOR_NEXT);
2304
2305 slang_fully_specified_type_destruct(&type);
2306 return 1;
2307 }
2308
2309
2310 /**
2311 * Parse a function definition or declaration.
2312 * \param C parsing context
2313 * \param O output context
2314 * \param definition if non-zero expect a definition, else a declaration
2315 * \param parsed_func_ret returns the parsed function
2316 * \return GL_TRUE if success, GL_FALSE if failure
2317 */
2318 static GLboolean
2319 parse_function(slang_parse_ctx * C, slang_output_ctx * O, int definition,
2320 slang_function ** parsed_func_ret)
2321 {
2322 slang_function parsed_func, *found_func;
2323
2324 /* parse function definition/declaration */
2325 if (!slang_function_construct(&parsed_func))
2326 return GL_FALSE;
2327 if (definition) {
2328 if (!parse_function_definition(C, O, &parsed_func)) {
2329 slang_function_destruct(&parsed_func);
2330 return GL_FALSE;
2331 }
2332 }
2333 else {
2334 if (!parse_function_prototype(C, O, &parsed_func)) {
2335 slang_function_destruct(&parsed_func);
2336 return GL_FALSE;
2337 }
2338 }
2339
2340 /* find a function with a prototype matching the parsed one - only
2341 * the current scope is being searched to allow built-in function
2342 * overriding
2343 */
2344 found_func = slang_function_scope_find(O->funs, &parsed_func, 0);
2345 if (found_func == NULL) {
2346 /* New function, add it to the function list */
2347 O->funs->functions =
2348 (slang_function *) _slang_realloc(O->funs->functions,
2349 O->funs->num_functions
2350 * sizeof(slang_function),
2351 (O->funs->num_functions + 1)
2352 * sizeof(slang_function));
2353 if (O->funs->functions == NULL) {
2354 /* Make sure that there are no functions marked, as the
2355 * allocation is currently NULL, in order to avoid
2356 * a potental segfault as we clean up later.
2357 */
2358 O->funs->num_functions = 0;
2359
2360 slang_info_log_memory(C->L);
2361 slang_function_destruct(&parsed_func);
2362 return GL_FALSE;
2363 }
2364 O->funs->functions[O->funs->num_functions] = parsed_func;
2365 O->funs->num_functions++;
2366
2367 /* return the newly parsed function */
2368 *parsed_func_ret = &O->funs->functions[O->funs->num_functions - 1];
2369 }
2370 else {
2371 /* previously defined or declared */
2372 /* TODO: check function return type qualifiers and specifiers */
2373 if (definition) {
2374 if (found_func->body != NULL) {
2375 slang_info_log_error(C->L, "%s: function already has a body.",
2376 slang_atom_pool_id(C->atoms,
2377 parsed_func.header.
2378 a_name));
2379 slang_function_destruct(&parsed_func);
2380 return GL_FALSE;
2381 }
2382
2383 /* destroy the existing function declaration and replace it
2384 * with the new one
2385 */
2386 slang_function_destruct(found_func);
2387 *found_func = parsed_func;
2388 }
2389 else {
2390 /* another declaration of the same function prototype - ignore it */
2391 slang_function_destruct(&parsed_func);
2392 }
2393
2394 /* return the found function */
2395 *parsed_func_ret = found_func;
2396 }
2397
2398 return GL_TRUE;
2399 }
2400
2401 /* declaration */
2402 #define DECLARATION_FUNCTION_PROTOTYPE 1
2403 #define DECLARATION_INIT_DECLARATOR_LIST 2
2404
2405 static int
2406 parse_declaration(slang_parse_ctx * C, slang_output_ctx * O)
2407 {
2408 switch (*C->I++) {
2409 case DECLARATION_INIT_DECLARATOR_LIST:
2410 if (!parse_init_declarator_list(C, O))
2411 RETURN0;
2412 break;
2413 case DECLARATION_FUNCTION_PROTOTYPE:
2414 {
2415 slang_function *dummy_func;
2416
2417 if (!parse_function(C, O, 0, &dummy_func))
2418 RETURN0;
2419 }
2420 break;
2421 default:
2422 RETURN0;
2423 }
2424 return 1;
2425 }
2426
2427 static int
2428 parse_default_precision(slang_parse_ctx * C, slang_output_ctx * O)
2429 {
2430 int precision, type;
2431
2432 if (!O->allow_precision) {
2433 slang_info_log_error(C->L, "syntax error at \"precision\"");
2434 RETURN0;
2435 }
2436
2437 precision = *C->I++;
2438 switch (precision) {
2439 case PRECISION_LOW:
2440 case PRECISION_MEDIUM:
2441 case PRECISION_HIGH:
2442 /* OK */
2443 break;
2444 default:
2445 _mesa_problem(NULL, "unexpected precision %d at %s:%d\n",
2446 precision, __FILE__, __LINE__);
2447 RETURN0;
2448 }
2449
2450 type = *C->I++;
2451 switch (type) {
2452 case TYPE_SPECIFIER_FLOAT:
2453 case TYPE_SPECIFIER_INT:
2454 case TYPE_SPECIFIER_SAMPLER1D:
2455 case TYPE_SPECIFIER_SAMPLER2D:
2456 case TYPE_SPECIFIER_SAMPLER3D:
2457 case TYPE_SPECIFIER_SAMPLERCUBE:
2458 case TYPE_SPECIFIER_SAMPLER1DSHADOW:
2459 case TYPE_SPECIFIER_SAMPLER2DSHADOW:
2460 case TYPE_SPECIFIER_SAMPLER2DRECT:
2461 case TYPE_SPECIFIER_SAMPLER2DRECTSHADOW:
2462 case TYPE_SPECIFIER_SAMPLER_1D_ARRAY:
2463 case TYPE_SPECIFIER_SAMPLER_2D_ARRAY:
2464 case TYPE_SPECIFIER_SAMPLER_1D_ARRAY_SHADOW:
2465 case TYPE_SPECIFIER_SAMPLER_2D_ARRAY_SHADOW:
2466 /* OK */
2467 break;
2468 default:
2469 _mesa_problem(NULL, "unexpected type %d at %s:%d\n",
2470 type, __FILE__, __LINE__);
2471 RETURN0;
2472 }
2473
2474 assert(type < TYPE_SPECIFIER_COUNT);
2475 O->default_precision[type] = precision;
2476
2477 return 1;
2478 }
2479
2480
2481 /**
2482 * Initialize the default precision for all types.
2483 * XXX this info isn't used yet.
2484 */
2485 static void
2486 init_default_precision(slang_output_ctx *O, slang_unit_type type)
2487 {
2488 GET_CURRENT_CONTEXT(ctx);
2489 GLuint i;
2490 for (i = 0; i < TYPE_SPECIFIER_COUNT; i++) {
2491 #if FEATURE_es2_glsl
2492 if (ctx->API == API_OPENGLES2)
2493 O->default_precision[i] = PRECISION_LOW;
2494 else
2495 O->default_precision[i] = PRECISION_HIGH;
2496 #else
2497 (void) ctx;
2498 O->default_precision[i] = PRECISION_HIGH;
2499 #endif
2500 }
2501
2502 if (type == SLANG_UNIT_VERTEX_SHADER) {
2503 O->default_precision[TYPE_SPECIFIER_FLOAT] = PRECISION_HIGH;
2504 O->default_precision[TYPE_SPECIFIER_INT] = PRECISION_HIGH;
2505 }
2506 else {
2507 O->default_precision[TYPE_SPECIFIER_INT] = PRECISION_MEDIUM;
2508 }
2509 }
2510
2511
2512 static int
2513 parse_invariant(slang_parse_ctx * C, slang_output_ctx * O)
2514 {
2515 if (O->allow_invariant) {
2516 slang_atom *a = parse_identifier(C);
2517 /* XXX not doing anything with this var yet */
2518 /*printf("ID: %s\n", (char*) a);*/
2519 return a ? 1 : 0;
2520 }
2521 else {
2522 slang_info_log_error(C->L, "syntax error at \"invariant\"");
2523 RETURN0;
2524 }
2525 }
2526
2527
2528 /* external declaration or default precision specifier */
2529 #define EXTERNAL_NULL 0
2530 #define EXTERNAL_FUNCTION_DEFINITION 1
2531 #define EXTERNAL_DECLARATION 2
2532 #define DEFAULT_PRECISION 3
2533 #define INVARIANT_STMT 4
2534
2535
2536 static GLboolean
2537 parse_code_unit(slang_parse_ctx * C, slang_code_unit * unit,
2538 struct gl_shader *shader)
2539 {
2540 GET_CURRENT_CONTEXT(ctx);
2541 slang_output_ctx o;
2542 GLboolean success;
2543 GLuint maxRegs;
2544 slang_function *mainFunc = NULL;
2545
2546 if (unit->type == SLANG_UNIT_FRAGMENT_BUILTIN ||
2547 unit->type == SLANG_UNIT_FRAGMENT_SHADER) {
2548 maxRegs = ctx->Const.FragmentProgram.MaxTemps;
2549 }
2550 else {
2551 assert(unit->type == SLANG_UNIT_VERTEX_BUILTIN ||
2552 unit->type == SLANG_UNIT_VERTEX_SHADER);
2553 maxRegs = ctx->Const.VertexProgram.MaxTemps;
2554 }
2555
2556 /* setup output context */
2557 o.funs = &unit->funs;
2558 o.structs = &unit->structs;
2559 o.vars = &unit->vars;
2560 o.program = shader ? shader->Program : NULL;
2561 o.pragmas = shader ? &shader->Pragmas : NULL;
2562 o.vartable = _slang_new_var_table(maxRegs);
2563 _slang_push_var_table(o.vartable);
2564
2565 /* allow 'invariant' keyword? */
2566 #if FEATURE_es2_glsl
2567 o.allow_invariant =
2568 (ctx->API == API_OPENGLES2 || C->version >= 120) ? GL_TRUE : GL_FALSE;
2569 #else
2570 o.allow_invariant = (C->version >= 120) ? GL_TRUE : GL_FALSE;
2571 #endif
2572
2573 /* allow 'centroid' keyword? */
2574 o.allow_centroid = (C->version >= 120) ? GL_TRUE : GL_FALSE;
2575
2576 /* allow 'lowp/mediump/highp' keywords? */
2577 #if FEATURE_es2_glsl
2578 o.allow_precision =
2579 (ctx->API == API_OPENGLES2 || C->version >= 120) ? GL_TRUE : GL_FALSE;
2580 #else
2581 o.allow_precision = (C->version >= 120) ? GL_TRUE : GL_FALSE;
2582 #endif
2583 init_default_precision(&o, unit->type);
2584
2585 /* allow 'float[]' keyword? */
2586 o.allow_array_types = (C->version >= 120) ? GL_TRUE : GL_FALSE;
2587
2588 /* parse individual functions and declarations */
2589 while (*C->I != EXTERNAL_NULL) {
2590 switch (*C->I++) {
2591 case EXTERNAL_FUNCTION_DEFINITION:
2592 {
2593 slang_function *func;
2594 success = parse_function(C, &o, 1, &func);
2595 if (success && strcmp((char *) func->header.a_name, "main") == 0) {
2596 /* found main() */
2597 mainFunc = func;
2598 }
2599 }
2600 break;
2601 case EXTERNAL_DECLARATION:
2602 success = parse_declaration(C, &o);
2603 break;
2604 case DEFAULT_PRECISION:
2605 success = parse_default_precision(C, &o);
2606 break;
2607 case INVARIANT_STMT:
2608 success = parse_invariant(C, &o);
2609 break;
2610 default:
2611 success = GL_FALSE;
2612 }
2613
2614 if (!success) {
2615 /* xxx free codegen */
2616 _slang_pop_var_table(o.vartable);
2617 return GL_FALSE;
2618 }
2619 }
2620 C->I++;
2621
2622 if (mainFunc) {
2623 /* assemble (generate code) for main() */
2624 slang_assemble_ctx A;
2625 memset(&A, 0, sizeof(slang_assemble_ctx));
2626 A.atoms = C->atoms;
2627 A.space.funcs = o.funs;
2628 A.space.structs = o.structs;
2629 A.space.vars = o.vars;
2630 A.program = o.program;
2631 A.pragmas = &shader->Pragmas;
2632 A.vartable = o.vartable;
2633 A.EmitContReturn = ctx->Shader.EmitContReturn;
2634 A.log = C->L;
2635 A.allow_uniform_initializers = C->version > 110;
2636
2637 /* main() takes no parameters */
2638 if (mainFunc->param_count > 0) {
2639 slang_info_log_error(A.log, "main() takes no arguments");
2640 return GL_FALSE;
2641 }
2642
2643 _slang_codegen_function(&A, mainFunc);
2644
2645 shader->Main = GL_TRUE; /* this shader defines main() */
2646
2647 shader->UnresolvedRefs = A.UnresolvedRefs;
2648 }
2649
2650 _slang_pop_var_table(o.vartable);
2651 _slang_delete_var_table(o.vartable);
2652
2653 return GL_TRUE;
2654 }
2655
2656 static GLboolean
2657 compile_binary(const unsigned char * prod, slang_code_unit * unit,
2658 GLuint version,
2659 slang_unit_type type, slang_info_log * infolog,
2660 slang_code_unit * builtin, slang_code_unit * downlink,
2661 struct gl_shader *shader)
2662 {
2663 slang_parse_ctx C;
2664
2665 unit->type = type;
2666
2667 /* setup parse context */
2668 C.I = prod;
2669 C.L = infolog;
2670 C.parsing_builtin = (builtin == NULL);
2671 C.global_scope = GL_TRUE;
2672 C.atoms = &unit->object->atompool;
2673 C.type = type;
2674 C.version = version;
2675
2676 if (!check_revision(&C))
2677 return GL_FALSE;
2678
2679 if (downlink != NULL) {
2680 unit->vars.outer_scope = &downlink->vars;
2681 unit->funs.outer_scope = &downlink->funs;
2682 unit->structs.outer_scope = &downlink->structs;
2683 }
2684
2685 /* parse translation unit */
2686 return parse_code_unit(&C, unit, shader);
2687 }
2688
2689 static GLboolean
2690 compile_with_grammar(const char *source,
2691 slang_code_unit *unit,
2692 slang_unit_type type,
2693 slang_info_log *infolog,
2694 slang_code_unit *builtin,
2695 struct gl_shader *shader,
2696 struct gl_sl_pragmas *pragmas,
2697 unsigned int shader_type,
2698 unsigned int parsing_builtin)
2699 {
2700 GET_CURRENT_CONTEXT(ctx);
2701 struct sl_pp_purify_options options;
2702 struct sl_pp_context *context;
2703 unsigned char *prod;
2704 GLuint size;
2705 unsigned int version;
2706 unsigned int maxVersion;
2707 int result;
2708 char errmsg[200] = "";
2709
2710 assert(shader_type == 1 || shader_type == 2);
2711
2712 memset(&options, 0, sizeof(options));
2713
2714 context = sl_pp_context_create(source, &options);
2715 if (!context) {
2716 slang_info_log_error(infolog, "out of memory");
2717 return GL_FALSE;
2718 }
2719
2720 if (sl_pp_version(context, &version)) {
2721 slang_info_log_error(infolog, "%s", sl_pp_context_error_message(context));
2722 sl_pp_context_destroy(context);
2723 return GL_FALSE;
2724 }
2725
2726 if (sl_pp_context_add_extension(context, "GL_ARB_draw_buffers") ||
2727 sl_pp_context_add_extension(context, "GL_ARB_texture_rectangle")) {
2728 slang_info_log_error(infolog, "%s", sl_pp_context_error_message(context));
2729 sl_pp_context_destroy(context);
2730 return GL_FALSE;
2731 }
2732
2733 if (type == SLANG_UNIT_FRAGMENT_SHADER) {
2734 sl_pp_context_add_extension(context, "GL_ARB_fragment_coord_conventions");
2735 }
2736
2737
2738 #if FEATURE_es2_glsl
2739 if (ctx->API == API_OPENGLES2) {
2740 if (sl_pp_context_add_predefined(context, "GL_ES", "1") ||
2741 sl_pp_context_add_predefined(context, "GL_FRAGMENT_PRECISION_HIGH", "1")) {
2742 slang_info_log_error(infolog, "%s", sl_pp_context_error_message(context));
2743 sl_pp_context_destroy(context);
2744 return GL_FALSE;
2745 }
2746 }
2747 #else
2748 (void) ctx;
2749 #endif
2750
2751 #if FEATURE_ARB_shading_language_120
2752 maxVersion = 120;
2753 #elif FEATURE_es2_glsl
2754 maxVersion = 100;
2755 #else
2756 maxVersion = 110;
2757 #endif
2758
2759 if (version > maxVersion ||
2760 (version != 100 && version != 110 && version != 120)) {
2761 slang_info_log_error(infolog,
2762 "language version %.2f is not supported.",
2763 version * 0.01);
2764 sl_pp_context_destroy(context);
2765 return GL_FALSE;
2766 }
2767
2768 /* Finally check the syntax and generate its binary representation. */
2769 result = sl_cl_compile(context,
2770 shader_type,
2771 parsing_builtin,
2772 &prod,
2773 &size,
2774 errmsg,
2775 sizeof(errmsg));
2776
2777 sl_pp_context_destroy(context);
2778
2779 if (result) {
2780 /*GLint pos;*/
2781
2782 slang_info_log_error(infolog, errmsg);
2783 /* syntax error (possibly in library code) */
2784 #if 0
2785 {
2786 int line, col;
2787 char *s;
2788 s = (char *) _mesa_find_line_column((const GLubyte *) source,
2789 (const GLubyte *) source + pos,
2790 &line, &col);
2791 printf("Error on line %d, col %d: %s\n", line, col, s);
2792 }
2793 #endif
2794 return GL_FALSE;
2795 }
2796
2797 /* Syntax is okay - translate it to internal representation. */
2798 if (!compile_binary(prod, unit, version, type, infolog, builtin,
2799 &builtin[SLANG_BUILTIN_TOTAL - 1],
2800 shader)) {
2801 free(prod);
2802 return GL_FALSE;
2803 }
2804 free(prod);
2805 return GL_TRUE;
2806 }
2807
2808 static const unsigned char slang_core_gc[] = {
2809 #include "library/slang_core_gc.h"
2810 };
2811
2812 static const unsigned char slang_120_core_gc[] = {
2813 #include "library/slang_120_core_gc.h"
2814 };
2815
2816 static const unsigned char slang_120_fragment_gc[] = {
2817 #include "library/slang_builtin_120_fragment_gc.h"
2818 };
2819
2820 static const unsigned char slang_common_builtin_gc[] = {
2821 #include "library/slang_common_builtin_gc.h"
2822 };
2823
2824 static const unsigned char slang_fragment_builtin_gc[] = {
2825 #include "library/slang_fragment_builtin_gc.h"
2826 };
2827
2828 static const unsigned char slang_vertex_builtin_gc[] = {
2829 #include "library/slang_vertex_builtin_gc.h"
2830 };
2831
2832 static GLboolean
2833 compile_object(const char *source,
2834 slang_code_object *object,
2835 slang_unit_type type,
2836 slang_info_log *infolog,
2837 struct gl_shader *shader,
2838 struct gl_sl_pragmas *pragmas)
2839 {
2840 slang_code_unit *builtins = NULL;
2841 GLuint base_version = 110;
2842 unsigned int shader_type;
2843 unsigned int parsing_builtin;
2844
2845 /* set shader type - the syntax is slightly different for different shaders */
2846 if (type == SLANG_UNIT_FRAGMENT_SHADER || type == SLANG_UNIT_FRAGMENT_BUILTIN) {
2847 shader_type = 1;
2848 } else {
2849 shader_type = 2;
2850 }
2851
2852 /* enable language extensions */
2853 parsing_builtin = 1;
2854
2855 /* if parsing user-specified shader, load built-in library */
2856 if (type == SLANG_UNIT_FRAGMENT_SHADER || type == SLANG_UNIT_VERTEX_SHADER) {
2857 /* compile core functionality first */
2858 if (!compile_binary(slang_core_gc,
2859 &object->builtin[SLANG_BUILTIN_CORE],
2860 base_version,
2861 SLANG_UNIT_FRAGMENT_BUILTIN, infolog,
2862 NULL, NULL, NULL))
2863 return GL_FALSE;
2864
2865 #if FEATURE_ARB_shading_language_120
2866 if (!compile_binary(slang_120_core_gc,
2867 &object->builtin[SLANG_BUILTIN_120_CORE],
2868 120,
2869 SLANG_UNIT_FRAGMENT_BUILTIN, infolog,
2870 NULL, &object->builtin[SLANG_BUILTIN_CORE], NULL))
2871 return GL_FALSE;
2872 #endif
2873
2874 /* compile common functions and variables, link to core */
2875 if (!compile_binary(slang_common_builtin_gc,
2876 &object->builtin[SLANG_BUILTIN_COMMON],
2877 #if FEATURE_ARB_shading_language_120
2878 120,
2879 #else
2880 base_version,
2881 #endif
2882 SLANG_UNIT_FRAGMENT_BUILTIN, infolog, NULL,
2883 #if FEATURE_ARB_shading_language_120
2884 &object->builtin[SLANG_BUILTIN_120_CORE],
2885 #else
2886 &object->builtin[SLANG_BUILTIN_CORE],
2887 #endif
2888 NULL))
2889 return GL_FALSE;
2890
2891 /* compile target-specific functions and variables, link to common */
2892 if (type == SLANG_UNIT_FRAGMENT_SHADER) {
2893 if (!compile_binary(slang_fragment_builtin_gc,
2894 &object->builtin[SLANG_BUILTIN_TARGET],
2895 base_version,
2896 SLANG_UNIT_FRAGMENT_BUILTIN, infolog, NULL,
2897 &object->builtin[SLANG_BUILTIN_COMMON], NULL))
2898 return GL_FALSE;
2899 #if FEATURE_ARB_shading_language_120
2900 if (!compile_binary(slang_120_fragment_gc,
2901 &object->builtin[SLANG_BUILTIN_TARGET],
2902 120,
2903 SLANG_UNIT_FRAGMENT_BUILTIN, infolog, NULL,
2904 &object->builtin[SLANG_BUILTIN_COMMON], NULL))
2905 return GL_FALSE;
2906 #endif
2907 }
2908 else if (type == SLANG_UNIT_VERTEX_SHADER) {
2909 if (!compile_binary(slang_vertex_builtin_gc,
2910 &object->builtin[SLANG_BUILTIN_TARGET],
2911 base_version,
2912 SLANG_UNIT_VERTEX_BUILTIN, infolog, NULL,
2913 &object->builtin[SLANG_BUILTIN_COMMON], NULL))
2914 return GL_FALSE;
2915 }
2916
2917 /* disable language extensions */
2918 parsing_builtin = 0;
2919
2920 builtins = object->builtin;
2921 }
2922
2923 /* compile the actual shader - pass-in built-in library for external shader */
2924 return compile_with_grammar(source,
2925 &object->unit,
2926 type,
2927 infolog,
2928 builtins,
2929 shader,
2930 pragmas,
2931 shader_type,
2932 parsing_builtin);
2933 }
2934
2935
2936 GLboolean
2937 _slang_compile(GLcontext *ctx, struct gl_shader *shader)
2938 {
2939 GLboolean success;
2940 slang_info_log info_log;
2941 slang_code_object obj;
2942 slang_unit_type type;
2943 GLenum progTarget;
2944
2945 if (shader->Type == GL_VERTEX_SHADER) {
2946 type = SLANG_UNIT_VERTEX_SHADER;
2947 }
2948 else {
2949 assert(shader->Type == GL_FRAGMENT_SHADER);
2950 type = SLANG_UNIT_FRAGMENT_SHADER;
2951 }
2952
2953 if (!shader->Source)
2954 return GL_FALSE;
2955
2956 ctx->Shader.MemPool = _slang_new_mempool(1024*1024);
2957
2958 shader->Main = GL_FALSE;
2959
2960 /* free the shader's old instructions, etc */
2961 _mesa_reference_program(ctx, &shader->Program, NULL);
2962
2963 /* allocate new GPU program, parameter lists, etc. */
2964 if (shader->Type == GL_VERTEX_SHADER)
2965 progTarget = GL_VERTEX_PROGRAM_ARB;
2966 else
2967 progTarget = GL_FRAGMENT_PROGRAM_ARB;
2968 shader->Program = ctx->Driver.NewProgram(ctx, progTarget, 1);
2969 shader->Program->Parameters = _mesa_new_parameter_list();
2970 shader->Program->Varying = _mesa_new_parameter_list();
2971 shader->Program->Attributes = _mesa_new_parameter_list();
2972
2973 slang_info_log_construct(&info_log);
2974 _slang_code_object_ctr(&obj);
2975
2976 success = compile_object(shader->Source,
2977 &obj,
2978 type,
2979 &info_log,
2980 shader,
2981 &shader->Pragmas);
2982
2983 /* free shader's prev info log */
2984 if (shader->InfoLog) {
2985 free(shader->InfoLog);
2986 shader->InfoLog = NULL;
2987 }
2988
2989 if (info_log.text) {
2990 /* copy info-log string to shader object */
2991 shader->InfoLog = _mesa_strdup(info_log.text);
2992 }
2993
2994 if (info_log.error_flag) {
2995 success = GL_FALSE;
2996 }
2997
2998 slang_info_log_destruct(&info_log);
2999 _slang_code_object_dtr(&obj);
3000
3001 _slang_delete_mempool((slang_mempool *) ctx->Shader.MemPool);
3002 ctx->Shader.MemPool = NULL;
3003
3004 /* remove any reads of output registers */
3005 #if 0
3006 printf("Pre-remove output reads:\n");
3007 _mesa_print_program(shader->Program);
3008 #endif
3009 _mesa_remove_output_reads(shader->Program, PROGRAM_OUTPUT);
3010 if (shader->Type == GL_VERTEX_SHADER) {
3011 /* and remove writes to varying vars in vertex programs */
3012 _mesa_remove_output_reads(shader->Program, PROGRAM_VARYING);
3013 }
3014 #if 0
3015 printf("Post-remove output reads:\n");
3016 _mesa_print_program(shader->Program);
3017 #endif
3018
3019 shader->CompileStatus = success;
3020
3021 if (success) {
3022 if (shader->Pragmas.Optimize &&
3023 (ctx->Shader.Flags & GLSL_NO_OPT) == 0) {
3024 _mesa_optimize_program(ctx, shader->Program);
3025 }
3026 if ((ctx->Shader.Flags & GLSL_NOP_VERT) &&
3027 shader->Program->Target == GL_VERTEX_PROGRAM_ARB) {
3028 _mesa_nop_vertex_program(ctx,
3029 (struct gl_vertex_program *) shader->Program);
3030 }
3031 if ((ctx->Shader.Flags & GLSL_NOP_FRAG) &&
3032 shader->Program->Target == GL_FRAGMENT_PROGRAM_ARB) {
3033 _mesa_nop_fragment_program(ctx,
3034 (struct gl_fragment_program *) shader->Program);
3035 }
3036 }
3037
3038 if (ctx->Shader.Flags & GLSL_LOG) {
3039 _mesa_write_shader_to_file(shader);
3040 }
3041
3042 return success;
3043 }
3044