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Implement vertex attribute binding.
[mesa.git] / src / mesa / shader / slang / slang_compile.c
1 /*
2 * Mesa 3-D graphics library
3 * Version: 6.5.2
4 *
5 * Copyright (C) 2005-2006 Brian Paul 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 "imports.h"
32 #include "context.h"
33 #include "program.h"
34 #include "prog_parameter.h"
35 #include "grammar_mesa.h"
36 #include "slang_codegen.h"
37 #include "slang_compile.h"
38 #include "slang_preprocess.h"
39 #include "slang_storage.h"
40 #include "slang_error.h"
41
42 #include "slang_print.h"
43
44 /*
45 * This is a straightforward implementation of the slang front-end
46 * compiler. Lots of error-checking functionality is missing but
47 * every well-formed shader source should compile successfully and
48 * execute as expected. However, some semantically ill-formed shaders
49 * may be accepted resulting in undefined behaviour.
50 */
51
52
53
54 /**
55 * Allocate storage for a variable of 'size' bytes from given pool.
56 * Return the allocated address for the variable.
57 */
58 static GLuint
59 slang_var_pool_alloc(slang_var_pool * pool, unsigned int size)
60 {
61 const GLuint addr = pool->next_addr;
62 pool->next_addr += size;
63 return addr;
64 }
65
66 /*
67 * slang_code_unit
68 */
69
70 GLvoid
71 _slang_code_unit_ctr(slang_code_unit * self,
72 struct slang_code_object_ * object)
73 {
74 _slang_variable_scope_ctr(&self->vars);
75 _slang_function_scope_ctr(&self->funs);
76 _slang_struct_scope_ctr(&self->structs);
77 self->object = object;
78 }
79
80 GLvoid
81 _slang_code_unit_dtr(slang_code_unit * self)
82 {
83 slang_variable_scope_destruct(&self->vars);
84 slang_function_scope_destruct(&self->funs);
85 slang_struct_scope_destruct(&self->structs);
86 }
87
88 /*
89 * slang_code_object
90 */
91
92 GLvoid
93 _slang_code_object_ctr(slang_code_object * self)
94 {
95 GLuint i;
96
97 for (i = 0; i < SLANG_BUILTIN_TOTAL; i++)
98 _slang_code_unit_ctr(&self->builtin[i], self);
99 _slang_code_unit_ctr(&self->unit, self);
100 _slang_assembly_file_ctr(&self->assembly);
101 slang_machine_ctr(&self->machine);
102 self->varpool.next_addr = 0;
103 slang_atom_pool_construct(&self->atompool);
104 slang_export_data_table_ctr(&self->expdata);
105 self->expdata.atoms = &self->atompool;
106 slang_export_code_table_ctr(&self->expcode);
107 self->expcode.atoms = &self->atompool;
108 }
109
110 GLvoid
111 _slang_code_object_dtr(slang_code_object * self)
112 {
113 GLuint i;
114
115 for (i = 0; i < SLANG_BUILTIN_TOTAL; i++)
116 _slang_code_unit_dtr(&self->builtin[i]);
117 _slang_code_unit_dtr(&self->unit);
118 slang_assembly_file_destruct(&self->assembly);
119 slang_machine_dtr(&self->machine);
120 slang_atom_pool_destruct(&self->atompool);
121 slang_export_data_table_dtr(&self->expdata);
122 slang_export_code_table_ctr(&self->expcode);
123 }
124
125 /* slang_info_log */
126
127 static char *out_of_memory = "Error: Out of memory.\n";
128
129 void
130 slang_info_log_construct(slang_info_log * log)
131 {
132 log->text = NULL;
133 log->dont_free_text = 0;
134 }
135
136 void
137 slang_info_log_destruct(slang_info_log * log)
138 {
139 if (!log->dont_free_text)
140 slang_alloc_free(log->text);
141 }
142
143 static int
144 slang_info_log_message(slang_info_log * log, const char *prefix,
145 const char *msg)
146 {
147 GLuint size;
148
149 if (log->dont_free_text)
150 return 0;
151 size = slang_string_length(msg) + 2;
152 if (prefix != NULL)
153 size += slang_string_length(prefix) + 2;
154 if (log->text != NULL) {
155 GLuint old_len = slang_string_length(log->text);
156 log->text = (char *)
157 slang_alloc_realloc(log->text, old_len + 1, old_len + size);
158 }
159 else {
160 log->text = (char *) (slang_alloc_malloc(size));
161 if (log->text != NULL)
162 log->text[0] = '\0';
163 }
164 if (log->text == NULL)
165 return 0;
166 if (prefix != NULL) {
167 slang_string_concat(log->text, prefix);
168 slang_string_concat(log->text, ": ");
169 }
170 slang_string_concat(log->text, msg);
171 slang_string_concat(log->text, "\n");
172 return 1;
173 }
174
175 int
176 slang_info_log_print(slang_info_log * log, const char *msg, ...)
177 {
178 va_list va;
179 char buf[1024];
180
181 va_start(va, msg);
182 _mesa_vsprintf(buf, msg, va);
183 va_end(va);
184 return slang_info_log_message(log, NULL, buf);
185 }
186
187 int
188 slang_info_log_error(slang_info_log * log, const char *msg, ...)
189 {
190 va_list va;
191 char buf[1024];
192
193 va_start(va, msg);
194 _mesa_vsprintf(buf, msg, va);
195 va_end(va);
196 if (slang_info_log_message(log, "Error", buf))
197 return 1;
198 slang_info_log_memory(log);
199 return 0;
200 }
201
202 int
203 slang_info_log_warning(slang_info_log * log, const char *msg, ...)
204 {
205 va_list va;
206 char buf[1024];
207
208 va_start(va, msg);
209 _mesa_vsprintf(buf, msg, va);
210 va_end(va);
211 if (slang_info_log_message(log, "Warning", buf))
212 return 1;
213 slang_info_log_memory(log);
214 return 0;
215 }
216
217 void
218 slang_info_log_memory(slang_info_log * log)
219 {
220 if (!slang_info_log_message(log, "Error", "Out of memory.")) {
221 log->dont_free_text = 1;
222 log->text = out_of_memory;
223 }
224 abort();
225 }
226
227 /* slang_parse_ctx */
228
229 typedef struct slang_parse_ctx_
230 {
231 const byte *I;
232 slang_info_log *L;
233 int parsing_builtin;
234 GLboolean global_scope; /**< Is object being declared a global? */
235 slang_atom_pool *atoms;
236 slang_unit_type type; /**< Vertex vs. Fragment */
237 } slang_parse_ctx;
238
239 /* slang_output_ctx */
240
241 typedef struct slang_output_ctx_
242 {
243 slang_variable_scope *vars;
244 slang_function_scope *funs;
245 slang_struct_scope *structs;
246 slang_assembly_file *assembly;
247 slang_var_pool *global_pool;
248 slang_machine *machine;
249 struct gl_program *program;
250 } slang_output_ctx;
251
252 /* _slang_compile() */
253
254 static void
255 parse_identifier_str(slang_parse_ctx * C, char **id)
256 {
257 *id = (char *) C->I;
258 C->I += _mesa_strlen(*id) + 1;
259 }
260
261 static slang_atom
262 parse_identifier(slang_parse_ctx * C)
263 {
264 const char *id;
265
266 id = (const char *) C->I;
267 C->I += _mesa_strlen(id) + 1;
268 return slang_atom_pool_atom(C->atoms, id);
269 }
270
271 static int
272 parse_number(slang_parse_ctx * C, int *number)
273 {
274 const int radix = (int) (*C->I++);
275 *number = 0;
276 while (*C->I != '\0') {
277 int digit;
278 if (*C->I >= '0' && *C->I <= '9')
279 digit = (int) (*C->I - '0');
280 else if (*C->I >= 'A' && *C->I <= 'Z')
281 digit = (int) (*C->I - 'A') + 10;
282 else
283 digit = (int) (*C->I - 'a') + 10;
284 *number = *number * radix + digit;
285 C->I++;
286 }
287 C->I++;
288 if (*number > 65535)
289 slang_info_log_warning(C->L, "%d: literal integer overflow.", *number);
290 return 1;
291 }
292
293 static int
294 parse_float(slang_parse_ctx * C, float *number)
295 {
296 char *integral = NULL;
297 char *fractional = NULL;
298 char *exponent = NULL;
299 char *whole = NULL;
300
301 parse_identifier_str(C, &integral);
302 parse_identifier_str(C, &fractional);
303 parse_identifier_str(C, &exponent);
304
305 whole = (char *) (slang_alloc_malloc((_mesa_strlen(integral) +
306 _mesa_strlen(fractional) +
307 _mesa_strlen(exponent) + 3) * sizeof(char)));
308 if (whole == NULL) {
309 slang_info_log_memory(C->L);
310 return 0;
311 }
312
313 slang_string_copy(whole, integral);
314 slang_string_concat(whole, ".");
315 slang_string_concat(whole, fractional);
316 slang_string_concat(whole, "E");
317 slang_string_concat(whole, exponent);
318
319 *number = (float) (_mesa_strtod(whole, (char **) NULL));
320
321 slang_alloc_free(whole);
322 return 1;
323 }
324
325 /* revision number - increment after each change affecting emitted output */
326 #define REVISION 3
327
328 static int
329 check_revision(slang_parse_ctx * C)
330 {
331 if (*C->I != REVISION) {
332 slang_info_log_error(C->L, "Internal compiler error.");
333 return 0;
334 }
335 C->I++;
336 return 1;
337 }
338
339 static int parse_statement(slang_parse_ctx *, slang_output_ctx *,
340 slang_operation *);
341 static int parse_expression(slang_parse_ctx *, slang_output_ctx *,
342 slang_operation *);
343 static int parse_type_specifier(slang_parse_ctx *, slang_output_ctx *,
344 slang_type_specifier *);
345
346 static GLboolean
347 parse_array_len(slang_parse_ctx * C, slang_output_ctx * O, GLuint * len)
348 {
349 slang_operation array_size;
350 slang_assembly_name_space space;
351 GLboolean result;
352
353 if (!slang_operation_construct(&array_size))
354 return GL_FALSE;
355 if (!parse_expression(C, O, &array_size)) {
356 slang_operation_destruct(&array_size);
357 return GL_FALSE;
358 }
359
360 space.funcs = O->funs;
361 space.structs = O->structs;
362 space.vars = O->vars;
363 result = _slang_evaluate_int(O->assembly, O->machine, &space,
364 &array_size, len, C->atoms);
365 slang_operation_destruct(&array_size);
366 return result;
367 }
368
369 static GLboolean
370 calculate_var_size(slang_parse_ctx * C, slang_output_ctx * O,
371 slang_variable * var)
372 {
373 slang_storage_aggregate agg;
374
375 if (!slang_storage_aggregate_construct(&agg))
376 return GL_FALSE;
377 if (!_slang_aggregate_variable(&agg, &var->type.specifier, var->array_len,
378 O->funs, O->structs, O->vars, O->machine,
379 O->assembly, C->atoms)) {
380 slang_storage_aggregate_destruct(&agg);
381 return GL_FALSE;
382 }
383 var->size = _slang_sizeof_aggregate(&agg);
384 slang_storage_aggregate_destruct(&agg);
385 return GL_TRUE;
386 }
387
388 static GLboolean
389 convert_to_array(slang_parse_ctx * C, slang_variable * var,
390 const slang_type_specifier * sp)
391 {
392 /* sized array - mark it as array, copy the specifier to the array element and
393 * parse the expression */
394 var->type.specifier.type = slang_spec_array;
395 var->type.specifier._array = (slang_type_specifier *)
396 slang_alloc_malloc(sizeof(slang_type_specifier));
397 if (var->type.specifier._array == NULL) {
398 slang_info_log_memory(C->L);
399 return GL_FALSE;
400 }
401 slang_type_specifier_ctr(var->type.specifier._array);
402 return slang_type_specifier_copy(var->type.specifier._array, sp);
403 }
404
405 /* structure field */
406 #define FIELD_NONE 0
407 #define FIELD_NEXT 1
408 #define FIELD_ARRAY 2
409
410 static GLboolean
411 parse_struct_field_var(slang_parse_ctx * C, slang_output_ctx * O,
412 slang_variable * var, const slang_type_specifier * sp)
413 {
414 var->a_name = parse_identifier(C);
415 if (var->a_name == SLANG_ATOM_NULL)
416 return GL_FALSE;
417
418 switch (*C->I++) {
419 case FIELD_NONE:
420 if (!slang_type_specifier_copy(&var->type.specifier, sp))
421 return GL_FALSE;
422 break;
423 case FIELD_ARRAY:
424 if (!convert_to_array(C, var, sp))
425 return GL_FALSE;
426 if (!parse_array_len(C, O, &var->array_len))
427 return GL_FALSE;
428 break;
429 default:
430 return GL_FALSE;
431 }
432
433 return calculate_var_size(C, O, var);
434 }
435
436 static int
437 parse_struct_field(slang_parse_ctx * C, slang_output_ctx * O,
438 slang_struct * st, slang_type_specifier * sp)
439 {
440 slang_output_ctx o = *O;
441
442 o.structs = st->structs;
443 if (!parse_type_specifier(C, &o, sp))
444 return 0;
445
446 do {
447 slang_variable *var = slang_variable_scope_grow(st->fields);
448 if (!var) {
449 slang_info_log_memory(C->L);
450 return 0;
451 }
452 if (!parse_struct_field_var(C, &o, var, sp))
453 return 0;
454 }
455 while (*C->I++ != FIELD_NONE);
456
457 return 1;
458 }
459
460 static int
461 parse_struct(slang_parse_ctx * C, slang_output_ctx * O, slang_struct ** st)
462 {
463 slang_atom a_name;
464 const char *name;
465
466 /* parse struct name (if any) and make sure it is unique in current scope */
467 a_name = parse_identifier(C);
468 if (a_name == SLANG_ATOM_NULL)
469 return 0;
470
471 name = slang_atom_pool_id(C->atoms, a_name);
472 if (name[0] != '\0'
473 && slang_struct_scope_find(O->structs, a_name, 0) != NULL) {
474 slang_info_log_error(C->L, "%s: duplicate type name.", name);
475 return 0;
476 }
477
478 /* set-up a new struct */
479 *st = (slang_struct *) slang_alloc_malloc(sizeof(slang_struct));
480 if (*st == NULL) {
481 slang_info_log_memory(C->L);
482 return 0;
483 }
484 if (!slang_struct_construct(*st)) {
485 slang_alloc_free(*st);
486 *st = NULL;
487 slang_info_log_memory(C->L);
488 return 0;
489 }
490 (**st).a_name = a_name;
491 (**st).structs->outer_scope = O->structs;
492
493 /* parse individual struct fields */
494 do {
495 slang_type_specifier sp;
496
497 slang_type_specifier_ctr(&sp);
498 if (!parse_struct_field(C, O, *st, &sp)) {
499 slang_type_specifier_dtr(&sp);
500 return 0;
501 }
502 slang_type_specifier_dtr(&sp);
503 }
504 while (*C->I++ != FIELD_NONE);
505
506 /* if named struct, copy it to current scope */
507 if (name[0] != '\0') {
508 slang_struct *s;
509
510 O->structs->structs =
511 (slang_struct *) slang_alloc_realloc(O->structs->structs,
512 O->structs->num_structs *
513 sizeof(slang_struct),
514 (O->structs->num_structs +
515 1) * sizeof(slang_struct));
516 if (O->structs->structs == NULL) {
517 slang_info_log_memory(C->L);
518 return 0;
519 }
520 s = &O->structs->structs[O->structs->num_structs];
521 if (!slang_struct_construct(s))
522 return 0;
523 O->structs->num_structs++;
524 if (!slang_struct_copy(s, *st))
525 return 0;
526 }
527
528 return 1;
529 }
530
531
532 /* type qualifier */
533 #define TYPE_QUALIFIER_NONE 0
534 #define TYPE_QUALIFIER_CONST 1
535 #define TYPE_QUALIFIER_ATTRIBUTE 2
536 #define TYPE_QUALIFIER_VARYING 3
537 #define TYPE_QUALIFIER_UNIFORM 4
538 #define TYPE_QUALIFIER_FIXEDOUTPUT 5
539 #define TYPE_QUALIFIER_FIXEDINPUT 6
540
541 static int
542 parse_type_qualifier(slang_parse_ctx * C, slang_type_qualifier * qual)
543 {
544 switch (*C->I++) {
545 case TYPE_QUALIFIER_NONE:
546 *qual = slang_qual_none;
547 break;
548 case TYPE_QUALIFIER_CONST:
549 *qual = slang_qual_const;
550 break;
551 case TYPE_QUALIFIER_ATTRIBUTE:
552 *qual = slang_qual_attribute;
553 break;
554 case TYPE_QUALIFIER_VARYING:
555 *qual = slang_qual_varying;
556 break;
557 case TYPE_QUALIFIER_UNIFORM:
558 *qual = slang_qual_uniform;
559 break;
560 case TYPE_QUALIFIER_FIXEDOUTPUT:
561 *qual = slang_qual_fixedoutput;
562 break;
563 case TYPE_QUALIFIER_FIXEDINPUT:
564 *qual = slang_qual_fixedinput;
565 break;
566 default:
567 return 0;
568 }
569 return 1;
570 }
571
572 /* type specifier */
573 #define TYPE_SPECIFIER_VOID 0
574 #define TYPE_SPECIFIER_BOOL 1
575 #define TYPE_SPECIFIER_BVEC2 2
576 #define TYPE_SPECIFIER_BVEC3 3
577 #define TYPE_SPECIFIER_BVEC4 4
578 #define TYPE_SPECIFIER_INT 5
579 #define TYPE_SPECIFIER_IVEC2 6
580 #define TYPE_SPECIFIER_IVEC3 7
581 #define TYPE_SPECIFIER_IVEC4 8
582 #define TYPE_SPECIFIER_FLOAT 9
583 #define TYPE_SPECIFIER_VEC2 10
584 #define TYPE_SPECIFIER_VEC3 11
585 #define TYPE_SPECIFIER_VEC4 12
586 #define TYPE_SPECIFIER_MAT2 13
587 #define TYPE_SPECIFIER_MAT3 14
588 #define TYPE_SPECIFIER_MAT4 15
589 #define TYPE_SPECIFIER_SAMPLER1D 16
590 #define TYPE_SPECIFIER_SAMPLER2D 17
591 #define TYPE_SPECIFIER_SAMPLER3D 18
592 #define TYPE_SPECIFIER_SAMPLERCUBE 19
593 #define TYPE_SPECIFIER_SAMPLER1DSHADOW 20
594 #define TYPE_SPECIFIER_SAMPLER2DSHADOW 21
595 #define TYPE_SPECIFIER_STRUCT 22
596 #define TYPE_SPECIFIER_TYPENAME 23
597
598 static int
599 parse_type_specifier(slang_parse_ctx * C, slang_output_ctx * O,
600 slang_type_specifier * spec)
601 {
602 switch (*C->I++) {
603 case TYPE_SPECIFIER_VOID:
604 spec->type = slang_spec_void;
605 break;
606 case TYPE_SPECIFIER_BOOL:
607 spec->type = slang_spec_bool;
608 break;
609 case TYPE_SPECIFIER_BVEC2:
610 spec->type = slang_spec_bvec2;
611 break;
612 case TYPE_SPECIFIER_BVEC3:
613 spec->type = slang_spec_bvec3;
614 break;
615 case TYPE_SPECIFIER_BVEC4:
616 spec->type = slang_spec_bvec4;
617 break;
618 case TYPE_SPECIFIER_INT:
619 spec->type = slang_spec_int;
620 break;
621 case TYPE_SPECIFIER_IVEC2:
622 spec->type = slang_spec_ivec2;
623 break;
624 case TYPE_SPECIFIER_IVEC3:
625 spec->type = slang_spec_ivec3;
626 break;
627 case TYPE_SPECIFIER_IVEC4:
628 spec->type = slang_spec_ivec4;
629 break;
630 case TYPE_SPECIFIER_FLOAT:
631 spec->type = slang_spec_float;
632 break;
633 case TYPE_SPECIFIER_VEC2:
634 spec->type = slang_spec_vec2;
635 break;
636 case TYPE_SPECIFIER_VEC3:
637 spec->type = slang_spec_vec3;
638 break;
639 case TYPE_SPECIFIER_VEC4:
640 spec->type = slang_spec_vec4;
641 break;
642 case TYPE_SPECIFIER_MAT2:
643 spec->type = slang_spec_mat2;
644 break;
645 case TYPE_SPECIFIER_MAT3:
646 spec->type = slang_spec_mat3;
647 break;
648 case TYPE_SPECIFIER_MAT4:
649 spec->type = slang_spec_mat4;
650 break;
651 case TYPE_SPECIFIER_SAMPLER1D:
652 spec->type = slang_spec_sampler1D;
653 break;
654 case TYPE_SPECIFIER_SAMPLER2D:
655 spec->type = slang_spec_sampler2D;
656 break;
657 case TYPE_SPECIFIER_SAMPLER3D:
658 spec->type = slang_spec_sampler3D;
659 break;
660 case TYPE_SPECIFIER_SAMPLERCUBE:
661 spec->type = slang_spec_samplerCube;
662 break;
663 case TYPE_SPECIFIER_SAMPLER1DSHADOW:
664 spec->type = slang_spec_sampler1DShadow;
665 break;
666 case TYPE_SPECIFIER_SAMPLER2DSHADOW:
667 spec->type = slang_spec_sampler2DShadow;
668 break;
669 case TYPE_SPECIFIER_STRUCT:
670 spec->type = slang_spec_struct;
671 if (!parse_struct(C, O, &spec->_struct))
672 return 0;
673 break;
674 case TYPE_SPECIFIER_TYPENAME:
675 spec->type = slang_spec_struct;
676 {
677 slang_atom a_name;
678 slang_struct *stru;
679
680 a_name = parse_identifier(C);
681 if (a_name == NULL)
682 return 0;
683
684 stru = slang_struct_scope_find(O->structs, a_name, 1);
685 if (stru == NULL) {
686 slang_info_log_error(C->L, "undeclared type name '%s'",
687 slang_atom_pool_id(C->atoms, a_name));
688 return 0;
689 }
690
691 spec->_struct =
692 (slang_struct *) slang_alloc_malloc(sizeof(slang_struct));
693 if (spec->_struct == NULL) {
694 slang_info_log_memory(C->L);
695 return 0;
696 }
697 if (!slang_struct_construct(spec->_struct)) {
698 slang_alloc_free(spec->_struct);
699 spec->_struct = NULL;
700 return 0;
701 }
702 if (!slang_struct_copy(spec->_struct, stru))
703 return 0;
704 }
705 break;
706 default:
707 return 0;
708 }
709 return 1;
710 }
711
712 static int
713 parse_fully_specified_type(slang_parse_ctx * C, slang_output_ctx * O,
714 slang_fully_specified_type * type)
715 {
716 if (!parse_type_qualifier(C, &type->qualifier))
717 return 0;
718 if (!parse_type_specifier(C, O, &type->specifier))
719 return 0;
720 return 1;
721 }
722
723 /* operation */
724 #define OP_END 0
725 #define OP_BLOCK_BEGIN_NO_NEW_SCOPE 1
726 #define OP_BLOCK_BEGIN_NEW_SCOPE 2
727 #define OP_DECLARE 3
728 #define OP_ASM 4
729 #define OP_BREAK 5
730 #define OP_CONTINUE 6
731 #define OP_DISCARD 7
732 #define OP_RETURN 8
733 #define OP_EXPRESSION 9
734 #define OP_IF 10
735 #define OP_WHILE 11
736 #define OP_DO 12
737 #define OP_FOR 13
738 #define OP_PUSH_VOID 14
739 #define OP_PUSH_BOOL 15
740 #define OP_PUSH_INT 16
741 #define OP_PUSH_FLOAT 17
742 #define OP_PUSH_IDENTIFIER 18
743 #define OP_SEQUENCE 19
744 #define OP_ASSIGN 20
745 #define OP_ADDASSIGN 21
746 #define OP_SUBASSIGN 22
747 #define OP_MULASSIGN 23
748 #define OP_DIVASSIGN 24
749 /*#define OP_MODASSIGN 25*/
750 /*#define OP_LSHASSIGN 26*/
751 /*#define OP_RSHASSIGN 27*/
752 /*#define OP_ORASSIGN 28*/
753 /*#define OP_XORASSIGN 29*/
754 /*#define OP_ANDASSIGN 30*/
755 #define OP_SELECT 31
756 #define OP_LOGICALOR 32
757 #define OP_LOGICALXOR 33
758 #define OP_LOGICALAND 34
759 /*#define OP_BITOR 35*/
760 /*#define OP_BITXOR 36*/
761 /*#define OP_BITAND 37*/
762 #define OP_EQUAL 38
763 #define OP_NOTEQUAL 39
764 #define OP_LESS 40
765 #define OP_GREATER 41
766 #define OP_LESSEQUAL 42
767 #define OP_GREATEREQUAL 43
768 /*#define OP_LSHIFT 44*/
769 /*#define OP_RSHIFT 45*/
770 #define OP_ADD 46
771 #define OP_SUBTRACT 47
772 #define OP_MULTIPLY 48
773 #define OP_DIVIDE 49
774 /*#define OP_MODULUS 50*/
775 #define OP_PREINCREMENT 51
776 #define OP_PREDECREMENT 52
777 #define OP_PLUS 53
778 #define OP_MINUS 54
779 /*#define OP_COMPLEMENT 55*/
780 #define OP_NOT 56
781 #define OP_SUBSCRIPT 57
782 #define OP_CALL 58
783 #define OP_FIELD 59
784 #define OP_POSTINCREMENT 60
785 #define OP_POSTDECREMENT 61
786
787
788 /**
789 * When parsing a compound production, this function is used to parse the
790 * children.
791 * For example, a a while-loop compound will have two children, the
792 * while condition expression and the loop body. So, this function will
793 * be called twice to parse those two sub-expressions.
794 * \param C the parsing context
795 * \param O the output context
796 * \param oper the operation we're parsing
797 * \param statement indicates whether parsing a statement, or expression
798 * \return 1 if success, 0 if error
799 */
800 static int
801 parse_child_operation(slang_parse_ctx * C, slang_output_ctx * O,
802 slang_operation * oper, GLboolean statement)
803 {
804 slang_operation *ch;
805
806 /* grow child array */
807 ch = slang_operation_grow(&oper->num_children, &oper->children);
808 if (statement)
809 return parse_statement(C, O, ch);
810 return parse_expression(C, O, ch);
811 }
812
813 static int parse_declaration(slang_parse_ctx * C, slang_output_ctx * O);
814
815 static int
816 parse_statement(slang_parse_ctx * C, slang_output_ctx * O,
817 slang_operation * oper)
818 {
819 oper->locals->outer_scope = O->vars;
820 switch (*C->I++) {
821 case OP_BLOCK_BEGIN_NO_NEW_SCOPE:
822 /* parse child statements, do not create new variable scope */
823 oper->type = slang_oper_block_no_new_scope;
824 while (*C->I != OP_END)
825 if (!parse_child_operation(C, O, oper, 1))
826 return 0;
827 C->I++;
828 break;
829 case OP_BLOCK_BEGIN_NEW_SCOPE:
830 /* parse child statements, create new variable scope */
831 {
832 slang_output_ctx o = *O;
833
834 oper->type = slang_oper_block_new_scope;
835 o.vars = oper->locals;
836 while (*C->I != OP_END)
837 if (!parse_child_operation(C, &o, oper, 1))
838 return 0;
839 C->I++;
840 }
841 break;
842 case OP_DECLARE:
843 /* local variable declaration, individual declarators are stored as
844 * children identifiers
845 */
846 oper->type = slang_oper_block_no_new_scope;
847 {
848 const unsigned int first_var = O->vars->num_variables;
849
850 /* parse the declaration, note that there can be zero or more
851 * than one declarators
852 */
853 if (!parse_declaration(C, O))
854 return 0;
855 if (first_var < O->vars->num_variables) {
856 const unsigned int num_vars = O->vars->num_variables - first_var;
857 unsigned int i;
858
859 oper->num_children = num_vars;
860 oper->children = slang_operation_new(num_vars);
861 if (oper->children == NULL) {
862 slang_info_log_memory(C->L);
863 return 0;
864 }
865 for (i = first_var; i < O->vars->num_variables; i++) {
866 slang_operation *o = &oper->children[i - first_var];
867 o->type = slang_oper_variable_decl;
868 o->locals->outer_scope = O->vars;
869 o->a_id = O->vars->variables[i].a_name;
870 }
871 }
872 }
873 break;
874 case OP_ASM:
875 /* the __asm statement, parse the mnemonic and all its arguments
876 * as expressions
877 */
878 oper->type = slang_oper_asm;
879 oper->a_id = parse_identifier(C);
880 if (strcmp((char*)oper->a_id, "dot") == 0) {
881 printf("Assemble dot! **************************\n");
882 }
883 if (oper->a_id == SLANG_ATOM_NULL)
884 return 0;
885 while (*C->I != OP_END) {
886 if (!parse_child_operation(C, O, oper, 0))
887 return 0;
888 }
889 C->I++;
890 break;
891 case OP_BREAK:
892 oper->type = slang_oper_break;
893 break;
894 case OP_CONTINUE:
895 oper->type = slang_oper_continue;
896 break;
897 case OP_DISCARD:
898 oper->type = slang_oper_discard;
899 break;
900 case OP_RETURN:
901 oper->type = slang_oper_return;
902 if (!parse_child_operation(C, O, oper, 0))
903 return 0;
904 break;
905 case OP_EXPRESSION:
906 oper->type = slang_oper_expression;
907 if (!parse_child_operation(C, O, oper, 0))
908 return 0;
909 break;
910 case OP_IF:
911 oper->type = slang_oper_if;
912 if (!parse_child_operation(C, O, oper, 0))
913 return 0;
914 if (!parse_child_operation(C, O, oper, 1))
915 return 0;
916 if (!parse_child_operation(C, O, oper, 1))
917 return 0;
918 break;
919 case OP_WHILE:
920 {
921 slang_output_ctx o = *O;
922
923 oper->type = slang_oper_while;
924 o.vars = oper->locals;
925 if (!parse_child_operation(C, &o, oper, 1))
926 return 0;
927 if (!parse_child_operation(C, &o, oper, 1))
928 return 0;
929 }
930 break;
931 case OP_DO:
932 oper->type = slang_oper_do;
933 if (!parse_child_operation(C, O, oper, 1))
934 return 0;
935 if (!parse_child_operation(C, O, oper, 0))
936 return 0;
937 break;
938 case OP_FOR:
939 {
940 slang_output_ctx o = *O;
941
942 oper->type = slang_oper_for;
943 o.vars = oper->locals;
944 if (!parse_child_operation(C, &o, oper, 1))
945 return 0;
946 if (!parse_child_operation(C, &o, oper, 1))
947 return 0;
948 if (!parse_child_operation(C, &o, oper, 0))
949 return 0;
950 if (!parse_child_operation(C, &o, oper, 1))
951 return 0;
952 }
953 break;
954 default:
955 return 0;
956 }
957 return 1;
958 }
959
960 static int
961 handle_nary_expression(slang_parse_ctx * C, slang_operation * op,
962 slang_operation ** ops, unsigned int *total_ops,
963 unsigned int n)
964 {
965 unsigned int i;
966
967 op->children =
968 (slang_operation *) slang_alloc_malloc(n * sizeof(slang_operation));
969 if (op->children == NULL) {
970 slang_info_log_memory(C->L);
971 return 0;
972 }
973 op->num_children = n;
974
975 for (i = 0; i < n; i++)
976 op->children[i] = (*ops)[*total_ops - (n + 1 - i)];
977 (*ops)[*total_ops - (n + 1)] = (*ops)[*total_ops - 1];
978 *total_ops -= n;
979
980 *ops = (slang_operation *)
981 slang_alloc_realloc(*ops,
982 (*total_ops + n) * sizeof(slang_operation),
983 *total_ops * sizeof(slang_operation));
984 if (*ops == NULL) {
985 slang_info_log_memory(C->L);
986 return 0;
987 }
988 return 1;
989 }
990
991 static int
992 is_constructor_name(const char *name, slang_atom a_name,
993 slang_struct_scope * structs)
994 {
995 if (slang_type_specifier_type_from_string(name) != slang_spec_void)
996 return 1;
997 return slang_struct_scope_find(structs, a_name, 1) != NULL;
998 }
999
1000 static int
1001 parse_expression(slang_parse_ctx * C, slang_output_ctx * O,
1002 slang_operation * oper)
1003 {
1004 slang_operation *ops = NULL;
1005 unsigned int num_ops = 0;
1006 int number;
1007
1008 while (*C->I != OP_END) {
1009 slang_operation *op;
1010 const unsigned int op_code = *C->I++;
1011
1012 /* allocate default operation, becomes a no-op if not used */
1013 ops = (slang_operation *)
1014 slang_alloc_realloc(ops,
1015 num_ops * sizeof(slang_operation),
1016 (num_ops + 1) * sizeof(slang_operation));
1017 if (ops == NULL) {
1018 slang_info_log_memory(C->L);
1019 return 0;
1020 }
1021 op = &ops[num_ops];
1022 if (!slang_operation_construct(op)) {
1023 slang_info_log_memory(C->L);
1024 return 0;
1025 }
1026 num_ops++;
1027 op->locals->outer_scope = O->vars;
1028
1029 switch (op_code) {
1030 case OP_PUSH_VOID:
1031 op->type = slang_oper_void;
1032 break;
1033 case OP_PUSH_BOOL:
1034 op->type = slang_oper_literal_bool;
1035 if (!parse_number(C, &number))
1036 return 0;
1037 op->literal[0] =
1038 op->literal[1] =
1039 op->literal[2] =
1040 op->literal[3] = (GLfloat) number;
1041 break;
1042 case OP_PUSH_INT:
1043 op->type = slang_oper_literal_int;
1044 if (!parse_number(C, &number))
1045 return 0;
1046 op->literal[0] =
1047 op->literal[1] =
1048 op->literal[2] =
1049 op->literal[3] = (GLfloat) number;
1050 break;
1051 case OP_PUSH_FLOAT:
1052 op->type = slang_oper_literal_float;
1053 if (!parse_float(C, &op->literal[0]))
1054 return 0;
1055 op->literal[1] =
1056 op->literal[2] =
1057 op->literal[3] = op->literal[0];
1058 break;
1059 case OP_PUSH_IDENTIFIER:
1060 op->type = slang_oper_identifier;
1061 op->a_id = parse_identifier(C);
1062 if (op->a_id == SLANG_ATOM_NULL)
1063 return 0;
1064 break;
1065 case OP_SEQUENCE:
1066 op->type = slang_oper_sequence;
1067 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1068 return 0;
1069 break;
1070 case OP_ASSIGN:
1071 op->type = slang_oper_assign;
1072 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1073 return 0;
1074 break;
1075 case OP_ADDASSIGN:
1076 op->type = slang_oper_addassign;
1077 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1078 return 0;
1079 break;
1080 case OP_SUBASSIGN:
1081 op->type = slang_oper_subassign;
1082 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1083 return 0;
1084 break;
1085 case OP_MULASSIGN:
1086 op->type = slang_oper_mulassign;
1087 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1088 return 0;
1089 break;
1090 case OP_DIVASSIGN:
1091 op->type = slang_oper_divassign;
1092 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1093 return 0;
1094 break;
1095 /*case OP_MODASSIGN: */
1096 /*case OP_LSHASSIGN: */
1097 /*case OP_RSHASSIGN: */
1098 /*case OP_ORASSIGN: */
1099 /*case OP_XORASSIGN: */
1100 /*case OP_ANDASSIGN: */
1101 case OP_SELECT:
1102 op->type = slang_oper_select;
1103 if (!handle_nary_expression(C, op, &ops, &num_ops, 3))
1104 return 0;
1105 break;
1106 case OP_LOGICALOR:
1107 op->type = slang_oper_logicalor;
1108 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1109 return 0;
1110 break;
1111 case OP_LOGICALXOR:
1112 op->type = slang_oper_logicalxor;
1113 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1114 return 0;
1115 break;
1116 case OP_LOGICALAND:
1117 op->type = slang_oper_logicaland;
1118 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1119 return 0;
1120 break;
1121 /*case OP_BITOR: */
1122 /*case OP_BITXOR: */
1123 /*case OP_BITAND: */
1124 case OP_EQUAL:
1125 op->type = slang_oper_equal;
1126 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1127 return 0;
1128 break;
1129 case OP_NOTEQUAL:
1130 op->type = slang_oper_notequal;
1131 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1132 return 0;
1133 break;
1134 case OP_LESS:
1135 op->type = slang_oper_less;
1136 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1137 return 0;
1138 break;
1139 case OP_GREATER:
1140 op->type = slang_oper_greater;
1141 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1142 return 0;
1143 break;
1144 case OP_LESSEQUAL:
1145 op->type = slang_oper_lessequal;
1146 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1147 return 0;
1148 break;
1149 case OP_GREATEREQUAL:
1150 op->type = slang_oper_greaterequal;
1151 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1152 return 0;
1153 break;
1154 /*case OP_LSHIFT: */
1155 /*case OP_RSHIFT: */
1156 case OP_ADD:
1157 op->type = slang_oper_add;
1158 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1159 return 0;
1160 break;
1161 case OP_SUBTRACT:
1162 op->type = slang_oper_subtract;
1163 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1164 return 0;
1165 break;
1166 case OP_MULTIPLY:
1167 op->type = slang_oper_multiply;
1168 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1169 return 0;
1170 break;
1171 case OP_DIVIDE:
1172 op->type = slang_oper_divide;
1173 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1174 return 0;
1175 break;
1176 /*case OP_MODULUS: */
1177 case OP_PREINCREMENT:
1178 op->type = slang_oper_preincrement;
1179 if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
1180 return 0;
1181 break;
1182 case OP_PREDECREMENT:
1183 op->type = slang_oper_predecrement;
1184 if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
1185 return 0;
1186 break;
1187 case OP_PLUS:
1188 op->type = slang_oper_plus;
1189 if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
1190 return 0;
1191 break;
1192 case OP_MINUS:
1193 op->type = slang_oper_minus;
1194 if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
1195 return 0;
1196 break;
1197 case OP_NOT:
1198 op->type = slang_oper_not;
1199 if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
1200 return 0;
1201 break;
1202 /*case OP_COMPLEMENT: */
1203 case OP_SUBSCRIPT:
1204 op->type = slang_oper_subscript;
1205 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1206 return 0;
1207 break;
1208 case OP_CALL:
1209 op->type = slang_oper_call;
1210 op->a_id = parse_identifier(C);
1211 if (op->a_id == SLANG_ATOM_NULL)
1212 return 0;
1213 while (*C->I != OP_END)
1214 if (!parse_child_operation(C, O, op, 0))
1215 return 0;
1216 C->I++;
1217
1218 if (!C->parsing_builtin
1219 && !slang_function_scope_find_by_name(O->funs, op->a_id, 1)) {
1220 const char *id;
1221
1222 id = slang_atom_pool_id(C->atoms, op->a_id);
1223 if (!is_constructor_name(id, op->a_id, O->structs)) {
1224 slang_info_log_error(C->L, "%s: undeclared function name.", id);
1225 return 0;
1226 }
1227 }
1228 break;
1229 case OP_FIELD:
1230 op->type = slang_oper_field;
1231 op->a_id = parse_identifier(C);
1232 if (op->a_id == SLANG_ATOM_NULL)
1233 return 0;
1234 if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
1235 return 0;
1236 break;
1237 case OP_POSTINCREMENT:
1238 op->type = slang_oper_postincrement;
1239 if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
1240 return 0;
1241 break;
1242 case OP_POSTDECREMENT:
1243 op->type = slang_oper_postdecrement;
1244 if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
1245 return 0;
1246 break;
1247 default:
1248 return 0;
1249 }
1250 }
1251 C->I++;
1252
1253 *oper = *ops;
1254 slang_alloc_free(ops);
1255
1256 return 1;
1257 }
1258
1259 /* parameter qualifier */
1260 #define PARAM_QUALIFIER_IN 0
1261 #define PARAM_QUALIFIER_OUT 1
1262 #define PARAM_QUALIFIER_INOUT 2
1263
1264 /* function parameter array presence */
1265 #define PARAMETER_ARRAY_NOT_PRESENT 0
1266 #define PARAMETER_ARRAY_PRESENT 1
1267
1268 static int
1269 parse_parameter_declaration(slang_parse_ctx * C, slang_output_ctx * O,
1270 slang_variable * param)
1271 {
1272 /* parse and validate the parameter's type qualifiers (there can be
1273 * two at most) because not all combinations are valid
1274 */
1275 if (!parse_type_qualifier(C, &param->type.qualifier))
1276 return 0;
1277 switch (*C->I++) {
1278 case PARAM_QUALIFIER_IN:
1279 if (param->type.qualifier != slang_qual_const
1280 && param->type.qualifier != slang_qual_none) {
1281 slang_info_log_error(C->L, "Invalid type qualifier.");
1282 return 0;
1283 }
1284 break;
1285 case PARAM_QUALIFIER_OUT:
1286 if (param->type.qualifier == slang_qual_none)
1287 param->type.qualifier = slang_qual_out;
1288 else {
1289 slang_info_log_error(C->L, "Invalid type qualifier.");
1290 return 0;
1291 }
1292 break;
1293 case PARAM_QUALIFIER_INOUT:
1294 if (param->type.qualifier == slang_qual_none)
1295 param->type.qualifier = slang_qual_inout;
1296 else {
1297 slang_info_log_error(C->L, "Invalid type qualifier.");
1298 return 0;
1299 }
1300 break;
1301 default:
1302 return 0;
1303 }
1304
1305 /* parse parameter's type specifier and name */
1306 if (!parse_type_specifier(C, O, &param->type.specifier))
1307 return 0;
1308 param->a_name = parse_identifier(C);
1309 if (param->a_name == SLANG_ATOM_NULL)
1310 return 0;
1311
1312 /* if the parameter is an array, parse its size (the size must be
1313 * explicitly defined
1314 */
1315 if (*C->I++ == PARAMETER_ARRAY_PRESENT) {
1316 slang_type_specifier p;
1317
1318 slang_type_specifier_ctr(&p);
1319 if (!slang_type_specifier_copy(&p, &param->type.specifier)) {
1320 slang_type_specifier_dtr(&p);
1321 return GL_FALSE;
1322 }
1323 if (!convert_to_array(C, param, &p)) {
1324 slang_type_specifier_dtr(&p);
1325 return GL_FALSE;
1326 }
1327 slang_type_specifier_dtr(&p);
1328 if (!parse_array_len(C, O, &param->array_len))
1329 return GL_FALSE;
1330 }
1331
1332 /* calculate the parameter size */
1333 if (!calculate_var_size(C, O, param))
1334 return GL_FALSE;
1335
1336 /* TODO: allocate the local address here? */
1337 return 1;
1338 }
1339
1340 /* function type */
1341 #define FUNCTION_ORDINARY 0
1342 #define FUNCTION_CONSTRUCTOR 1
1343 #define FUNCTION_OPERATOR 2
1344
1345 /* function parameter */
1346 #define PARAMETER_NONE 0
1347 #define PARAMETER_NEXT 1
1348
1349 /* operator type */
1350 #define OPERATOR_ADDASSIGN 1
1351 #define OPERATOR_SUBASSIGN 2
1352 #define OPERATOR_MULASSIGN 3
1353 #define OPERATOR_DIVASSIGN 4
1354 /*#define OPERATOR_MODASSIGN 5*/
1355 /*#define OPERATOR_LSHASSIGN 6*/
1356 /*#define OPERATOR_RSHASSIGN 7*/
1357 /*#define OPERATOR_ANDASSIGN 8*/
1358 /*#define OPERATOR_XORASSIGN 9*/
1359 /*#define OPERATOR_ORASSIGN 10*/
1360 #define OPERATOR_LOGICALXOR 11
1361 /*#define OPERATOR_BITOR 12*/
1362 /*#define OPERATOR_BITXOR 13*/
1363 /*#define OPERATOR_BITAND 14*/
1364 #define OPERATOR_LESS 15
1365 #define OPERATOR_GREATER 16
1366 #define OPERATOR_LESSEQUAL 17
1367 #define OPERATOR_GREATEREQUAL 18
1368 /*#define OPERATOR_LSHIFT 19*/
1369 /*#define OPERATOR_RSHIFT 20*/
1370 #define OPERATOR_MULTIPLY 21
1371 #define OPERATOR_DIVIDE 22
1372 /*#define OPERATOR_MODULUS 23*/
1373 #define OPERATOR_INCREMENT 24
1374 #define OPERATOR_DECREMENT 25
1375 #define OPERATOR_PLUS 26
1376 #define OPERATOR_MINUS 27
1377 /*#define OPERATOR_COMPLEMENT 28*/
1378 #define OPERATOR_NOT 29
1379
1380 static const struct
1381 {
1382 unsigned int o_code;
1383 const char *o_name;
1384 } operator_names[] = {
1385 {OPERATOR_INCREMENT, "++"},
1386 {OPERATOR_ADDASSIGN, "+="},
1387 {OPERATOR_PLUS, "+"},
1388 {OPERATOR_DECREMENT, "--"},
1389 {OPERATOR_SUBASSIGN, "-="},
1390 {OPERATOR_MINUS, "-"},
1391 {OPERATOR_NOT, "!"},
1392 {OPERATOR_MULASSIGN, "*="},
1393 {OPERATOR_MULTIPLY, "*"},
1394 {OPERATOR_DIVASSIGN, "/="},
1395 {OPERATOR_DIVIDE, "/"},
1396 {OPERATOR_LESSEQUAL, "<="},
1397 /*{ OPERATOR_LSHASSIGN, "<<=" }, */
1398 /*{ OPERATOR_LSHIFT, "<<" }, */
1399 {OPERATOR_LESS, "<"},
1400 {OPERATOR_GREATEREQUAL, ">="},
1401 /*{ OPERATOR_RSHASSIGN, ">>=" }, */
1402 /*{ OPERATOR_RSHIFT, ">>" }, */
1403 {OPERATOR_GREATER, ">"},
1404 /*{ OPERATOR_MODASSIGN, "%=" }, */
1405 /*{ OPERATOR_MODULUS, "%" }, */
1406 /*{ OPERATOR_ANDASSIGN, "&=" }, */
1407 /*{ OPERATOR_BITAND, "&" }, */
1408 /*{ OPERATOR_ORASSIGN, "|=" }, */
1409 /*{ OPERATOR_BITOR, "|" }, */
1410 /*{ OPERATOR_COMPLEMENT, "~" }, */
1411 /*{ OPERATOR_XORASSIGN, "^=" }, */
1412 {OPERATOR_LOGICALXOR, "^^"},
1413 /*{ OPERATOR_BITXOR, "^" } */
1414 };
1415
1416 static slang_atom
1417 parse_operator_name(slang_parse_ctx * C)
1418 {
1419 unsigned int i;
1420
1421 for (i = 0; i < sizeof(operator_names) / sizeof(*operator_names); i++) {
1422 if (operator_names[i].o_code == (unsigned int) (*C->I)) {
1423 slang_atom atom =
1424 slang_atom_pool_atom(C->atoms, operator_names[i].o_name);
1425 if (atom == SLANG_ATOM_NULL) {
1426 slang_info_log_memory(C->L);
1427 return 0;
1428 }
1429 C->I++;
1430 return atom;
1431 }
1432 }
1433 return 0;
1434 }
1435
1436 static int
1437 parse_function_prototype(slang_parse_ctx * C, slang_output_ctx * O,
1438 slang_function * func)
1439 {
1440 /* parse function type and name */
1441 if (!parse_fully_specified_type(C, O, &func->header.type))
1442 return 0;
1443 switch (*C->I++) {
1444 case FUNCTION_ORDINARY:
1445 func->kind = slang_func_ordinary;
1446 func->header.a_name = parse_identifier(C);
1447 if (func->header.a_name == SLANG_ATOM_NULL)
1448 return 0;
1449 break;
1450 case FUNCTION_CONSTRUCTOR:
1451 func->kind = slang_func_constructor;
1452 if (func->header.type.specifier.type == slang_spec_struct)
1453 return 0;
1454 func->header.a_name =
1455 slang_atom_pool_atom(C->atoms,
1456 slang_type_specifier_type_to_string
1457 (func->header.type.specifier.type));
1458 if (func->header.a_name == SLANG_ATOM_NULL) {
1459 slang_info_log_memory(C->L);
1460 return 0;
1461 }
1462 break;
1463 case FUNCTION_OPERATOR:
1464 func->kind = slang_func_operator;
1465 func->header.a_name = parse_operator_name(C);
1466 if (func->header.a_name == SLANG_ATOM_NULL)
1467 return 0;
1468 break;
1469 default:
1470 return 0;
1471 }
1472
1473 /* parse function parameters */
1474 while (*C->I++ == PARAMETER_NEXT) {
1475 slang_variable *p = slang_variable_scope_grow(func->parameters);
1476 if (!p) {
1477 slang_info_log_memory(C->L);
1478 return 0;
1479 }
1480 if (!parse_parameter_declaration(C, O, p))
1481 return 0;
1482 }
1483
1484 #if 111
1485 /* if the function returns a value, append a hidden __retVal 'out'
1486 * parameter that corresponds to the return value.
1487 */
1488 if (_slang_function_has_return_value(func)) {
1489 slang_variable *p = slang_variable_scope_grow(func->parameters);
1490 slang_atom a_retVal = slang_atom_pool_atom(C->atoms, "__retVal");
1491 assert(a_retVal);
1492 p->a_name = a_retVal;
1493 p->type = func->header.type;
1494 p->type.qualifier = slang_qual_out;
1495 }
1496 #endif
1497
1498 /* function formal parameters and local variables share the same
1499 * scope, so save the information about param count in a seperate
1500 * place also link the scope to the global variable scope so when a
1501 * given identifier is not found here, the search process continues
1502 * in the global space
1503 */
1504 func->param_count = func->parameters->num_variables;
1505 func->parameters->outer_scope = O->vars;
1506
1507 return 1;
1508 }
1509
1510 static int
1511 parse_function_definition(slang_parse_ctx * C, slang_output_ctx * O,
1512 slang_function * func)
1513 {
1514 slang_output_ctx o = *O;
1515
1516 if (!parse_function_prototype(C, O, func))
1517 return 0;
1518
1519 /* create function's body operation */
1520 func->body =
1521 (slang_operation *) slang_alloc_malloc(sizeof(slang_operation));
1522 if (func->body == NULL) {
1523 slang_info_log_memory(C->L);
1524 return 0;
1525 }
1526 if (!slang_operation_construct(func->body)) {
1527 slang_alloc_free(func->body);
1528 func->body = NULL;
1529 slang_info_log_memory(C->L);
1530 return 0;
1531 }
1532
1533 /* to parse the body the parse context is modified in order to
1534 * capture parsed variables into function's local variable scope
1535 */
1536 C->global_scope = GL_FALSE;
1537 o.vars = func->parameters;
1538 if (!parse_statement(C, &o, func->body))
1539 return 0;
1540
1541 C->global_scope = GL_TRUE;
1542 return 1;
1543 }
1544
1545 static GLboolean
1546 initialize_global(slang_assemble_ctx * A, slang_variable * var)
1547 {
1548 slang_assembly_file_restore_point point;
1549 slang_machine mach;
1550 slang_assembly_local_info save_local = A->local;
1551 slang_operation op_id, op_assign;
1552 GLboolean result;
1553
1554 /* save the current assembly */
1555 if (!slang_assembly_file_restore_point_save(A->file, &point))
1556 return GL_FALSE;
1557
1558 /* setup the machine */
1559 mach = *A->mach;
1560 mach.ip = A->file->count;
1561
1562 /* allocate local storage for expression */
1563 A->local.ret_size = 0;
1564 A->local.addr_tmp = 0;
1565 A->local.swizzle_tmp = 4;
1566 if (!slang_assembly_file_push_label(A->file, slang_asm_local_alloc, 20))
1567 return GL_FALSE;
1568 if (!slang_assembly_file_push_label(A->file, slang_asm_enter, 20))
1569 return GL_FALSE;
1570
1571 /* construct the left side of assignment */
1572 if (!slang_operation_construct(&op_id))
1573 return GL_FALSE;
1574 op_id.type = slang_oper_identifier;
1575 op_id.a_id = var->a_name;
1576
1577 /* put the variable into operation's scope */
1578 op_id.locals->variables =
1579 (slang_variable *) slang_alloc_malloc(sizeof(slang_variable));
1580 if (op_id.locals->variables == NULL) {
1581 slang_operation_destruct(&op_id);
1582 return GL_FALSE;
1583 }
1584 op_id.locals->num_variables = 1;
1585 op_id.locals->variables[0] = *var;
1586
1587 /* construct the assignment expression */
1588 if (!slang_operation_construct(&op_assign)) {
1589 op_id.locals->num_variables = 0;
1590 slang_operation_destruct(&op_id);
1591 return GL_FALSE;
1592 }
1593 op_assign.type = slang_oper_assign;
1594 op_assign.children =
1595 (slang_operation *) slang_alloc_malloc(2 * sizeof(slang_operation));
1596 if (op_assign.children == NULL) {
1597 slang_operation_destruct(&op_assign);
1598 op_id.locals->num_variables = 0;
1599 slang_operation_destruct(&op_id);
1600 return GL_FALSE;
1601 }
1602 op_assign.num_children = 2;
1603 op_assign.children[0] = op_id;
1604 op_assign.children[1] = *var->initializer;
1605
1606 /* insert the actual expression */
1607 result = _slang_assemble_operation(A, &op_assign, slang_ref_forbid);
1608
1609 /* carefully destroy the operations */
1610 op_assign.num_children = 0;
1611 slang_alloc_free(op_assign.children);
1612 op_assign.children = NULL;
1613 slang_operation_destruct(&op_assign);
1614 op_id.locals->num_variables = 0;
1615 slang_operation_destruct(&op_id);
1616
1617 if (!result)
1618 return GL_FALSE;
1619 if (!slang_assembly_file_push(A->file, slang_asm_exit))
1620 return GL_FALSE;
1621
1622 /* execute the expression */
1623 if (!_slang_execute2(A->file, &mach))
1624 return GL_FALSE;
1625
1626 /* restore the old assembly */
1627 if (!slang_assembly_file_restore_point_load(A->file, &point))
1628 return GL_FALSE;
1629 A->local = save_local;
1630
1631 /* now we copy the contents of the initialized variable back to the original machine */
1632 _mesa_memcpy((GLubyte *) A->mach->mem + var->address,
1633 (GLubyte *) mach.mem + var->address, var->size);
1634
1635 return GL_TRUE;
1636 }
1637
1638 /* init declarator list */
1639 #define DECLARATOR_NONE 0
1640 #define DECLARATOR_NEXT 1
1641
1642 /* variable declaration */
1643 #define VARIABLE_NONE 0
1644 #define VARIABLE_IDENTIFIER 1
1645 #define VARIABLE_INITIALIZER 2
1646 #define VARIABLE_ARRAY_EXPLICIT 3
1647 #define VARIABLE_ARRAY_UNKNOWN 4
1648
1649
1650 /**
1651 * Parse the initializer for a variable declaration.
1652 */
1653 static int
1654 parse_init_declarator(slang_parse_ctx * C, slang_output_ctx * O,
1655 const slang_fully_specified_type * type)
1656 {
1657 slang_variable *var;
1658
1659 /* empty init declatator (without name, e.g. "float ;") */
1660 if (*C->I++ == VARIABLE_NONE)
1661 return 1;
1662
1663 /* make room for the new variable and initialize it */
1664 var = slang_variable_scope_grow(O->vars);
1665 if (!var) {
1666 slang_info_log_memory(C->L);
1667 return 0;
1668 }
1669
1670 /* copy the declarator qualifier type, parse the identifier */
1671 var->global = C->global_scope;
1672 var->type.qualifier = type->qualifier;
1673 var->a_name = parse_identifier(C);
1674 if (var->a_name == SLANG_ATOM_NULL)
1675 return 0;
1676
1677 switch (*C->I++) {
1678 case VARIABLE_NONE:
1679 /* simple variable declarator - just copy the specifier */
1680 if (!slang_type_specifier_copy(&var->type.specifier, &type->specifier))
1681 return 0;
1682 break;
1683 case VARIABLE_INITIALIZER:
1684 /* initialized variable - copy the specifier and parse the expression */
1685 if (!slang_type_specifier_copy(&var->type.specifier, &type->specifier))
1686 return 0;
1687 var->initializer =
1688 (slang_operation *) slang_alloc_malloc(sizeof(slang_operation));
1689 if (var->initializer == NULL) {
1690 slang_info_log_memory(C->L);
1691 return 0;
1692 }
1693 if (!slang_operation_construct(var->initializer)) {
1694 slang_alloc_free(var->initializer);
1695 var->initializer = NULL;
1696 slang_info_log_memory(C->L);
1697 return 0;
1698 }
1699 if (!parse_expression(C, O, var->initializer))
1700 return 0;
1701 break;
1702 #if 0
1703 case VARIABLE_ARRAY_UNKNOWN:
1704 /* unsized array - mark it as array and copy the specifier to
1705 the array element
1706 */
1707 if (!convert_to_array(C, var, &type->specifier))
1708 return GL_FALSE;
1709 break;
1710 #endif
1711 case VARIABLE_ARRAY_EXPLICIT:
1712 if (!convert_to_array(C, var, &type->specifier))
1713 return GL_FALSE;
1714 if (!parse_array_len(C, O, &var->array_len))
1715 return GL_FALSE;
1716 break;
1717 default:
1718 return 0;
1719 }
1720
1721 #if 1
1722 if (C->global_scope /*&& O->program*/)
1723 _slang_codegen_global_variable(var, O->program, C->type);
1724 #endif
1725
1726 /* allocate global address space for a variable with a known size */
1727 if (C->global_scope
1728 && !(var->type.specifier.type == slang_spec_array
1729 && var->array_len == 0)) {
1730 if (!calculate_var_size(C, O, var))
1731 return GL_FALSE;
1732 var->address = slang_var_pool_alloc(O->global_pool, var->size);
1733 }
1734
1735 /* initialize global variable */
1736 if (C->global_scope) {
1737 if (var->initializer != NULL) {
1738 slang_assemble_ctx A;
1739
1740 A.file = O->assembly;
1741 A.mach = O->machine;
1742 A.atoms = C->atoms;
1743 A.space.funcs = O->funs;
1744 A.space.structs = O->structs;
1745 A.space.vars = O->vars;
1746 if (!initialize_global(&A, var))
1747 return 0;
1748 }
1749 else {
1750 _mesa_memset((GLubyte *) (O->machine->mem) + var->address, 0,
1751 var->size);
1752 }
1753 }
1754 return 1;
1755 }
1756
1757 /**
1758 * Parse a list of variable declarations. Each variable may have an
1759 * initializer.
1760 */
1761 static int
1762 parse_init_declarator_list(slang_parse_ctx * C, slang_output_ctx * O)
1763 {
1764 slang_fully_specified_type type;
1765
1766 /* parse the fully specified type, common to all declarators */
1767 if (!slang_fully_specified_type_construct(&type))
1768 return 0;
1769 if (!parse_fully_specified_type(C, O, &type)) {
1770 slang_fully_specified_type_destruct(&type);
1771 return 0;
1772 }
1773
1774 /* parse declarators, pass-in the parsed type */
1775 do {
1776 if (!parse_init_declarator(C, O, &type)) {
1777 slang_fully_specified_type_destruct(&type);
1778 return 0;
1779 }
1780 }
1781 while (*C->I++ == DECLARATOR_NEXT);
1782
1783 slang_fully_specified_type_destruct(&type);
1784 return 1;
1785 }
1786
1787
1788 /**
1789 * Parse a function definition or declaration.
1790 * \param C parsing context
1791 * \param O output context
1792 * \param definition if non-zero expect a definition, else a declaration
1793 * \param parsed_func_ret returns the parsed function
1794 * \return GL_TRUE if success, GL_FALSE if failure
1795 */
1796 static GLboolean
1797 parse_function(slang_parse_ctx * C, slang_output_ctx * O, int definition,
1798 slang_function ** parsed_func_ret)
1799 {
1800 slang_function parsed_func, *found_func;
1801
1802 /* parse function definition/declaration */
1803 if (!slang_function_construct(&parsed_func))
1804 return GL_FALSE;
1805 if (definition) {
1806 if (!parse_function_definition(C, O, &parsed_func)) {
1807 slang_function_destruct(&parsed_func);
1808 return GL_FALSE;
1809 }
1810 }
1811 else {
1812 if (!parse_function_prototype(C, O, &parsed_func)) {
1813 slang_function_destruct(&parsed_func);
1814 return GL_FALSE;
1815 }
1816 }
1817
1818 /* find a function with a prototype matching the parsed one - only
1819 * the current scope is being searched to allow built-in function
1820 * overriding
1821 */
1822 found_func = slang_function_scope_find(O->funs, &parsed_func, 0);
1823 if (found_func == NULL) {
1824 /* New function, add it to the function list */
1825 O->funs->functions =
1826 (slang_function *) slang_alloc_realloc(O->funs->functions,
1827 O->funs->num_functions *
1828 sizeof(slang_function),
1829 (O->funs->num_functions +
1830 1) * sizeof(slang_function));
1831 if (O->funs->functions == NULL) {
1832 slang_info_log_memory(C->L);
1833 slang_function_destruct(&parsed_func);
1834 return GL_FALSE;
1835 }
1836 O->funs->functions[O->funs->num_functions] = parsed_func;
1837 O->funs->num_functions++;
1838
1839 /* return the newly parsed function */
1840 *parsed_func_ret = &O->funs->functions[O->funs->num_functions - 1];
1841 }
1842 else {
1843 /* previously defined or declared */
1844 /* TODO: check function return type qualifiers and specifiers */
1845 if (definition) {
1846 if (found_func->body != NULL) {
1847 slang_info_log_error(C->L, "%s: function already has a body.",
1848 slang_atom_pool_id(C->atoms,
1849 parsed_func.header.
1850 a_name));
1851 slang_function_destruct(&parsed_func);
1852 return GL_FALSE;
1853 }
1854
1855 /* destroy the existing function declaration and replace it
1856 * with the new one, remember to save the fixup table
1857 */
1858 parsed_func.fixups = found_func->fixups;
1859 slang_fixup_table_init(&found_func->fixups);
1860 slang_function_destruct(found_func);
1861 *found_func = parsed_func;
1862 }
1863 else {
1864 /* another declaration of the same function prototype - ignore it */
1865 slang_function_destruct(&parsed_func);
1866 }
1867
1868 /* return the found function */
1869 *parsed_func_ret = found_func;
1870 }
1871
1872 /* assemble the parsed function */
1873 {
1874 slang_assemble_ctx A;
1875
1876 A.file = O->assembly;
1877 A.mach = O->machine;
1878 A.atoms = C->atoms;
1879 A.space.funcs = O->funs;
1880 A.space.structs = O->structs;
1881 A.space.vars = O->vars;
1882 A.program = O->program;
1883
1884 _slang_reset_error();
1885
1886 #if 0
1887 printf("*************** Assemble function %s ****\n", (char *) (*parsed_func_ret)->header.a_name);
1888 slang_print_var_scope((*parsed_func_ret)->parameters,
1889 (*parsed_func_ret)->param_count);
1890 #endif
1891
1892
1893 if (!_slang_assemble_function(&A, *parsed_func_ret)) {
1894 /* propogate the error message back through the info log */
1895 C->L->text = _mesa_strdup(_slang_error_text());
1896 C->L->dont_free_text = GL_FALSE;
1897 return GL_FALSE;
1898 }
1899
1900
1901 #if 0
1902 printf("**************************************\n");
1903 #endif
1904 #if 1
1905 _slang_codegen_function(&A, *parsed_func_ret);
1906 #endif
1907 }
1908 return GL_TRUE;
1909 }
1910
1911 /* declaration */
1912 #define DECLARATION_FUNCTION_PROTOTYPE 1
1913 #define DECLARATION_INIT_DECLARATOR_LIST 2
1914
1915 static int
1916 parse_declaration(slang_parse_ctx * C, slang_output_ctx * O)
1917 {
1918 switch (*C->I++) {
1919 case DECLARATION_INIT_DECLARATOR_LIST:
1920 if (!parse_init_declarator_list(C, O))
1921 return 0;
1922 break;
1923 case DECLARATION_FUNCTION_PROTOTYPE:
1924 {
1925 slang_function *dummy_func;
1926
1927 if (!parse_function(C, O, 0, &dummy_func))
1928 return 0;
1929 }
1930 break;
1931 default:
1932 return 0;
1933 }
1934 return 1;
1935 }
1936
1937 /* external declaration */
1938 #define EXTERNAL_NULL 0
1939 #define EXTERNAL_FUNCTION_DEFINITION 1
1940 #define EXTERNAL_DECLARATION 2
1941
1942 static GLboolean
1943 parse_code_unit(slang_parse_ctx * C, slang_code_unit * unit,
1944 struct gl_program *program)
1945 {
1946 slang_output_ctx o;
1947
1948 /* setup output context */
1949 o.funs = &unit->funs;
1950 o.structs = &unit->structs;
1951 o.vars = &unit->vars;
1952 o.assembly = &unit->object->assembly;
1953 o.global_pool = &unit->object->varpool;
1954 o.machine = &unit->object->machine;
1955 o.program = program;
1956
1957 /* parse individual functions and declarations */
1958 while (*C->I != EXTERNAL_NULL) {
1959 switch (*C->I++) {
1960 case EXTERNAL_FUNCTION_DEFINITION:
1961 {
1962 slang_function *func;
1963
1964 if (!parse_function(C, &o, 1, &func))
1965 return GL_FALSE;
1966 }
1967 break;
1968 case EXTERNAL_DECLARATION:
1969 if (!parse_declaration(C, &o))
1970 return GL_FALSE;
1971 break;
1972 default:
1973 return GL_FALSE;
1974 }
1975 }
1976 C->I++;
1977 return GL_TRUE;
1978 }
1979
1980 static GLboolean
1981 compile_binary(const byte * prod, slang_code_unit * unit,
1982 slang_unit_type type, slang_info_log * infolog,
1983 slang_code_unit * builtin, slang_code_unit * downlink,
1984 struct gl_program *program)
1985 {
1986 slang_parse_ctx C;
1987
1988 unit->type = type;
1989
1990 /* setup parse context */
1991 C.I = prod;
1992 C.L = infolog;
1993 C.parsing_builtin = (builtin == NULL);
1994 C.global_scope = GL_TRUE;
1995 C.atoms = &unit->object->atompool;
1996 C.type = type;
1997
1998 if (!check_revision(&C))
1999 return GL_FALSE;
2000
2001 if (downlink != NULL) {
2002 unit->vars.outer_scope = &downlink->vars;
2003 unit->funs.outer_scope = &downlink->funs;
2004 unit->structs.outer_scope = &downlink->structs;
2005 }
2006
2007 /* parse translation unit */
2008 return parse_code_unit(&C, unit, program);
2009 }
2010
2011 static GLboolean
2012 compile_with_grammar(grammar id, const char *source, slang_code_unit * unit,
2013 slang_unit_type type, slang_info_log * infolog,
2014 slang_code_unit * builtin,
2015 struct gl_program *program)
2016 {
2017 byte *prod;
2018 GLuint size, start, version;
2019 slang_string preprocessed;
2020
2021 /* First retrieve the version number. */
2022 if (!_slang_preprocess_version(source, &version, &start, infolog))
2023 return GL_FALSE;
2024
2025 if (version > 110) {
2026 slang_info_log_error(infolog,
2027 "language version specified is not supported.");
2028 return GL_FALSE;
2029 }
2030
2031 /* Now preprocess the source string. */
2032 slang_string_init(&preprocessed);
2033 if (!_slang_preprocess_directives(&preprocessed, &source[start], infolog)) {
2034 slang_string_free(&preprocessed);
2035 slang_info_log_error(infolog, "failed to preprocess the source.");
2036 return GL_FALSE;
2037 }
2038
2039 /* Finally check the syntax and generate its binary representation. */
2040 if (!grammar_fast_check(id,
2041 (const byte *) (slang_string_cstr(&preprocessed)),
2042 &prod, &size,
2043 65536)) {
2044 char buf[1024];
2045 GLint pos;
2046
2047 slang_string_free(&preprocessed);
2048 grammar_get_last_error((byte *) (buf), sizeof(buf), &pos);
2049 slang_info_log_error(infolog, buf);
2050 RETURN_ERROR("syntax error (possibly in library code)", 0);
2051 }
2052 slang_string_free(&preprocessed);
2053
2054 /* Syntax is okay - translate it to internal representation. */
2055 if (!compile_binary(prod, unit, type, infolog, builtin,
2056 &builtin[SLANG_BUILTIN_TOTAL - 1],
2057 program)) {
2058 grammar_alloc_free(prod);
2059 return GL_FALSE;
2060 }
2061 grammar_alloc_free(prod);
2062 return GL_TRUE;
2063 }
2064
2065 LONGSTRING static const char *slang_shader_syn =
2066 #include "library/slang_shader_syn.h"
2067 ;
2068
2069 static const byte slang_core_gc[] = {
2070 #include "library/slang_core_gc.h"
2071 };
2072
2073 static const byte slang_common_builtin_gc[] = {
2074 #include "library/slang_common_builtin_gc.h"
2075 };
2076
2077 static const byte slang_fragment_builtin_gc[] = {
2078 #include "library/slang_fragment_builtin_gc.h"
2079 };
2080
2081 static const byte slang_vertex_builtin_gc[] = {
2082 #include "library/slang_vertex_builtin_gc.h"
2083 };
2084
2085 #if defined(USE_X86_ASM) || defined(SLANG_X86)
2086 foo
2087 static const byte slang_builtin_vec4_gc[] = {
2088 #include "library/slang_builtin_vec4_gc.h"
2089 };
2090 #endif
2091
2092 static GLboolean
2093 compile_object(grammar * id, const char *source, slang_code_object * object,
2094 slang_unit_type type, slang_info_log * infolog,
2095 struct gl_program *program)
2096 {
2097 slang_code_unit *builtins = NULL;
2098
2099 /* load GLSL grammar */
2100 *id = grammar_load_from_text((const byte *) (slang_shader_syn));
2101 if (*id == 0) {
2102 byte buf[1024];
2103 int pos;
2104
2105 grammar_get_last_error(buf, 1024, &pos);
2106 slang_info_log_error(infolog, (const char *) (buf));
2107 return GL_FALSE;
2108 }
2109
2110 /* set shader type - the syntax is slightly different for different shaders */
2111 if (type == slang_unit_fragment_shader
2112 || type == slang_unit_fragment_builtin)
2113 grammar_set_reg8(*id, (const byte *) "shader_type", 1);
2114 else
2115 grammar_set_reg8(*id, (const byte *) "shader_type", 2);
2116
2117 /* enable language extensions */
2118 grammar_set_reg8(*id, (const byte *) "parsing_builtin", 1);
2119
2120 /* if parsing user-specified shader, load built-in library */
2121 if (type == slang_unit_fragment_shader || type == slang_unit_vertex_shader) {
2122 /* compile core functionality first */
2123 if (!compile_binary(slang_core_gc,
2124 &object->builtin[SLANG_BUILTIN_CORE],
2125 slang_unit_fragment_builtin, infolog,
2126 NULL, NULL, NULL))
2127 return GL_FALSE;
2128
2129 /* compile common functions and variables, link to core */
2130 if (!compile_binary(slang_common_builtin_gc,
2131 &object->builtin[SLANG_BUILTIN_COMMON],
2132 slang_unit_fragment_builtin, infolog, NULL,
2133 &object->builtin[SLANG_BUILTIN_CORE], NULL))
2134 return GL_FALSE;
2135
2136 /* compile target-specific functions and variables, link to common */
2137 if (type == slang_unit_fragment_shader) {
2138 if (!compile_binary(slang_fragment_builtin_gc,
2139 &object->builtin[SLANG_BUILTIN_TARGET],
2140 slang_unit_fragment_builtin, infolog, NULL,
2141 &object->builtin[SLANG_BUILTIN_COMMON], NULL))
2142 return GL_FALSE;
2143 }
2144 else if (type == slang_unit_vertex_shader) {
2145 if (!compile_binary(slang_vertex_builtin_gc,
2146 &object->builtin[SLANG_BUILTIN_TARGET],
2147 slang_unit_vertex_builtin, infolog, NULL,
2148 &object->builtin[SLANG_BUILTIN_COMMON], NULL))
2149 return GL_FALSE;
2150 }
2151
2152 #if defined(USE_X86_ASM) || defined(SLANG_X86)
2153 /* compile x86 4-component vector overrides, link to target */
2154 if (!compile_binary(slang_builtin_vec4_gc,
2155 &object->builtin[SLANG_BUILTIN_VEC4],
2156 slang_unit_fragment_builtin, infolog, NULL,
2157 &object->builtin[SLANG_BUILTIN_TARGET]))
2158 return GL_FALSE;
2159 #endif
2160
2161 /* disable language extensions */
2162 #if NEW_SLANG /* allow-built-ins */
2163 grammar_set_reg8(*id, (const byte *) "parsing_builtin", 1);
2164 #else
2165 grammar_set_reg8(*id, (const byte *) "parsing_builtin", 0);
2166 #endif
2167 builtins = object->builtin;
2168 }
2169
2170 /* compile the actual shader - pass-in built-in library for external shader */
2171 return compile_with_grammar(*id, source, &object->unit, type, infolog,
2172 builtins, program);
2173 }
2174
2175
2176 #if 0
2177 static void
2178 slang_create_uniforms(const slang_export_data_table *exports,
2179 struct gl_program *program)
2180 {
2181 /* XXX only add uniforms that are actually going to get used */
2182 GLuint i;
2183 for (i = 0; i < exports->count; i++) {
2184 if (exports->entries[i].access == slang_exp_uniform) {
2185 const char *name = (char *) exports->entries[i].quant.name;
2186 GLint j = _mesa_add_uniform(program->Parameters, name, 4);
2187 assert(j >= 0);
2188 }
2189 }
2190 }
2191 #endif
2192
2193
2194 static GLboolean
2195 compile_shader(GLcontext *ctx, slang_code_object * object,
2196 slang_unit_type type, slang_info_log * infolog,
2197 struct gl_shader *shader)
2198 {
2199 struct gl_program *program = shader->Programs[0];
2200 GLboolean success;
2201 grammar id = 0;
2202
2203 assert(program);
2204
2205 _slang_code_object_dtr(object);
2206 _slang_code_object_ctr(object);
2207
2208 success = compile_object(&id, shader->Source, object, type, infolog, program);
2209 if (id != 0)
2210 grammar_destroy(id);
2211 if (!success)
2212 return GL_FALSE;
2213
2214 if (!_slang_build_export_data_table(&object->expdata, &object->unit.vars))
2215 return GL_FALSE;
2216 if (!_slang_build_export_code_table(&object->expcode, &object->unit.funs,
2217 &object->unit))
2218 return GL_FALSE;
2219
2220 #if NEW_SLANG
2221 {
2222 slang_create_uniforms(&object->expdata, shader);
2223 _mesa_print_program(program);
2224 _mesa_print_program_parameters(ctx, program);
2225 }
2226 #endif
2227
2228 return GL_TRUE;
2229 }
2230
2231
2232
2233 GLboolean
2234 _slang_compile(GLcontext *ctx, struct gl_shader *shader)
2235 {
2236 GLboolean success;
2237 slang_info_log info_log;
2238 slang_code_object obj;
2239 slang_unit_type type;
2240
2241 if (shader->Type == GL_VERTEX_SHADER) {
2242 type = slang_unit_vertex_shader;
2243 }
2244 else {
2245 assert(shader->Type == GL_FRAGMENT_SHADER);
2246 type = slang_unit_fragment_shader;
2247 }
2248
2249 /* XXX temporary hack */
2250 if (!shader->Programs) {
2251 GLenum progTarget;
2252 if (shader->Type == GL_VERTEX_SHADER)
2253 progTarget = GL_VERTEX_PROGRAM_ARB;
2254 else
2255 progTarget = GL_FRAGMENT_PROGRAM_ARB;
2256 shader->Programs
2257 = (struct gl_program **) malloc(sizeof(struct gl_program*));
2258 shader->Programs[0] = _mesa_new_program(ctx, progTarget, 1);
2259 shader->NumPrograms = 1;
2260
2261 shader->Programs[0]->Parameters = _mesa_new_parameter_list();
2262 shader->Programs[0]->Varying = _mesa_new_parameter_list();
2263 shader->Programs[0]->Attributes = _mesa_new_parameter_list();
2264 }
2265
2266 slang_info_log_construct(&info_log);
2267 _slang_code_object_ctr(&obj);
2268
2269 success = compile_shader(ctx, &obj, type, &info_log, shader);
2270
2271 if (success) {
2272 #if 0
2273 slang_create_uniforms(&object->expdata, shader);
2274 _mesa_print_program(program);
2275 _mesa_print_program_parameters(ctx, program);
2276 #endif
2277 }
2278 else {
2279 /* XXX more work on info log needed here */
2280 if (info_log.text) {
2281 if (shader->InfoLog) {
2282 free(shader->InfoLog);
2283 shader->InfoLog = NULL;
2284 }
2285 shader->InfoLog = strdup(info_log.text);
2286 }
2287 }
2288
2289 slang_info_log_destruct(&info_log);
2290 _slang_code_object_dtr(&obj);
2291
2292 return success;
2293 }
2294