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[mesa.git] / src / mesa / main / shaderapi.c
1 /*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 2004-2008 Brian Paul All Rights Reserved.
5 * Copyright (C) 2009-2010 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 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
21 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
22 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
23 * OTHER DEALINGS IN THE SOFTWARE.
24 */
25
26 /**
27 * \file shaderapi.c
28 * \author Brian Paul
29 *
30 * Implementation of GLSL-related API functions.
31 * The glUniform* functions are in uniforms.c
32 *
33 *
34 * XXX things to do:
35 * 1. Check that the right error code is generated for all _mesa_error() calls.
36 * 2. Insert FLUSH_VERTICES calls in various places
37 */
38
39
40 #include <stdbool.h>
41 #include "main/glheader.h"
42 #include "main/context.h"
43 #include "main/dispatch.h"
44 #include "main/enums.h"
45 #include "main/hash.h"
46 #include "main/mtypes.h"
47 #include "main/pipelineobj.h"
48 #include "main/shaderapi.h"
49 #include "main/shaderobj.h"
50 #include "main/transformfeedback.h"
51 #include "main/uniforms.h"
52 #include "compiler/glsl/glsl_parser_extras.h"
53 #include "compiler/glsl/ir.h"
54 #include "compiler/glsl/ir_uniform.h"
55 #include "compiler/glsl/program.h"
56 #include "program/program.h"
57 #include "program/prog_print.h"
58 #include "program/prog_parameter.h"
59 #include "util/ralloc.h"
60 #include "util/hash_table.h"
61 #include "util/mesa-sha1.h"
62 #include "util/crc32.h"
63
64 /**
65 * Return mask of GLSL_x flags by examining the MESA_GLSL env var.
66 */
67 GLbitfield
68 _mesa_get_shader_flags(void)
69 {
70 GLbitfield flags = 0x0;
71 const char *env = getenv("MESA_GLSL");
72
73 if (env) {
74 if (strstr(env, "dump_on_error"))
75 flags |= GLSL_DUMP_ON_ERROR;
76 else if (strstr(env, "dump"))
77 flags |= GLSL_DUMP;
78 if (strstr(env, "log"))
79 flags |= GLSL_LOG;
80 if (strstr(env, "nopvert"))
81 flags |= GLSL_NOP_VERT;
82 if (strstr(env, "nopfrag"))
83 flags |= GLSL_NOP_FRAG;
84 if (strstr(env, "nopt"))
85 flags |= GLSL_NO_OPT;
86 else if (strstr(env, "opt"))
87 flags |= GLSL_OPT;
88 if (strstr(env, "uniform"))
89 flags |= GLSL_UNIFORMS;
90 if (strstr(env, "useprog"))
91 flags |= GLSL_USE_PROG;
92 if (strstr(env, "errors"))
93 flags |= GLSL_REPORT_ERRORS;
94 }
95
96 return flags;
97 }
98
99 /**
100 * Memoized version of getenv("MESA_SHADER_CAPTURE_PATH").
101 */
102 const char *
103 _mesa_get_shader_capture_path(void)
104 {
105 static bool read_env_var = false;
106 static const char *path = NULL;
107
108 if (!read_env_var) {
109 path = getenv("MESA_SHADER_CAPTURE_PATH");
110 read_env_var = true;
111 }
112
113 return path;
114 }
115
116 /**
117 * Initialize context's shader state.
118 */
119 void
120 _mesa_init_shader_state(struct gl_context *ctx)
121 {
122 /* Device drivers may override these to control what kind of instructions
123 * are generated by the GLSL compiler.
124 */
125 struct gl_shader_compiler_options options;
126 gl_shader_stage sh;
127 int i;
128
129 memset(&options, 0, sizeof(options));
130 options.MaxUnrollIterations = 32;
131 options.MaxIfDepth = UINT_MAX;
132
133 for (sh = 0; sh < MESA_SHADER_STAGES; ++sh)
134 memcpy(&ctx->Const.ShaderCompilerOptions[sh], &options, sizeof(options));
135
136 ctx->Shader.Flags = _mesa_get_shader_flags();
137
138 if (ctx->Shader.Flags != 0)
139 ctx->Const.GenerateTemporaryNames = true;
140
141 /* Extended for ARB_separate_shader_objects */
142 ctx->Shader.RefCount = 1;
143 mtx_init(&ctx->Shader.Mutex, mtx_plain);
144
145 ctx->TessCtrlProgram.patch_vertices = 3;
146 for (i = 0; i < 4; ++i)
147 ctx->TessCtrlProgram.patch_default_outer_level[i] = 1.0;
148 for (i = 0; i < 2; ++i)
149 ctx->TessCtrlProgram.patch_default_inner_level[i] = 1.0;
150 }
151
152
153 /**
154 * Free the per-context shader-related state.
155 */
156 void
157 _mesa_free_shader_state(struct gl_context *ctx)
158 {
159 int i;
160 for (i = 0; i < MESA_SHADER_STAGES; i++) {
161 _mesa_reference_shader_program(ctx, &ctx->Shader.CurrentProgram[i],
162 NULL);
163 }
164 _mesa_reference_shader_program(ctx, &ctx->Shader._CurrentFragmentProgram,
165 NULL);
166 _mesa_reference_shader_program(ctx, &ctx->Shader.ActiveProgram, NULL);
167
168 /* Extended for ARB_separate_shader_objects */
169 _mesa_reference_pipeline_object(ctx, &ctx->_Shader, NULL);
170
171 assert(ctx->Shader.RefCount == 1);
172 mtx_destroy(&ctx->Shader.Mutex);
173 }
174
175
176 /**
177 * Copy string from <src> to <dst>, up to maxLength characters, returning
178 * length of <dst> in <length>.
179 * \param src the strings source
180 * \param maxLength max chars to copy
181 * \param length returns number of chars copied
182 * \param dst the string destination
183 */
184 void
185 _mesa_copy_string(GLchar *dst, GLsizei maxLength,
186 GLsizei *length, const GLchar *src)
187 {
188 GLsizei len;
189 for (len = 0; len < maxLength - 1 && src && src[len]; len++)
190 dst[len] = src[len];
191 if (maxLength > 0)
192 dst[len] = 0;
193 if (length)
194 *length = len;
195 }
196
197
198
199 /**
200 * Confirm that the a shader type is valid and supported by the implementation
201 *
202 * \param ctx Current GL context
203 * \param type Shader target
204 *
205 */
206 bool
207 _mesa_validate_shader_target(const struct gl_context *ctx, GLenum type)
208 {
209 /* Note: when building built-in GLSL functions, this function may be
210 * invoked with ctx == NULL. In that case, we can only validate that it's
211 * a shader target we recognize, not that it's supported in the current
212 * context. But that's fine--we don't need any further validation than
213 * that when building built-in GLSL functions.
214 */
215
216 switch (type) {
217 case GL_FRAGMENT_SHADER:
218 return ctx == NULL || ctx->Extensions.ARB_fragment_shader;
219 case GL_VERTEX_SHADER:
220 return ctx == NULL || ctx->Extensions.ARB_vertex_shader;
221 case GL_GEOMETRY_SHADER_ARB:
222 return ctx == NULL || _mesa_has_geometry_shaders(ctx);
223 case GL_TESS_CONTROL_SHADER:
224 case GL_TESS_EVALUATION_SHADER:
225 return ctx == NULL || _mesa_has_tessellation(ctx);
226 case GL_COMPUTE_SHADER:
227 return ctx == NULL || _mesa_has_compute_shaders(ctx);
228 default:
229 return false;
230 }
231 }
232
233
234 static GLboolean
235 is_program(struct gl_context *ctx, GLuint name)
236 {
237 struct gl_shader_program *shProg = _mesa_lookup_shader_program(ctx, name);
238 return shProg ? GL_TRUE : GL_FALSE;
239 }
240
241
242 static GLboolean
243 is_shader(struct gl_context *ctx, GLuint name)
244 {
245 struct gl_shader *shader = _mesa_lookup_shader(ctx, name);
246 return shader ? GL_TRUE : GL_FALSE;
247 }
248
249
250 /**
251 * Attach shader to a shader program.
252 */
253 static void
254 attach_shader(struct gl_context *ctx, GLuint program, GLuint shader)
255 {
256 struct gl_shader_program *shProg;
257 struct gl_shader *sh;
258 GLuint i, n;
259
260 const bool same_type_disallowed = _mesa_is_gles(ctx);
261
262 shProg = _mesa_lookup_shader_program_err(ctx, program, "glAttachShader");
263 if (!shProg)
264 return;
265
266 sh = _mesa_lookup_shader_err(ctx, shader, "glAttachShader");
267 if (!sh) {
268 return;
269 }
270
271 n = shProg->NumShaders;
272 for (i = 0; i < n; i++) {
273 if (shProg->Shaders[i] == sh) {
274 /* The shader is already attched to this program. The
275 * GL_ARB_shader_objects spec says:
276 *
277 * "The error INVALID_OPERATION is generated by AttachObjectARB
278 * if <obj> is already attached to <containerObj>."
279 */
280 _mesa_error(ctx, GL_INVALID_OPERATION, "glAttachShader");
281 return;
282 } else if (same_type_disallowed &&
283 shProg->Shaders[i]->Stage == sh->Stage) {
284 /* Shader with the same type is already attached to this program,
285 * OpenGL ES 2.0 and 3.0 specs say:
286 *
287 * "Multiple shader objects of the same type may not be attached
288 * to a single program object. [...] The error INVALID_OPERATION
289 * is generated if [...] another shader object of the same type
290 * as shader is already attached to program."
291 */
292 _mesa_error(ctx, GL_INVALID_OPERATION, "glAttachShader");
293 return;
294 }
295 }
296
297 /* grow list */
298 shProg->Shaders = realloc(shProg->Shaders,
299 (n + 1) * sizeof(struct gl_shader *));
300 if (!shProg->Shaders) {
301 _mesa_error(ctx, GL_OUT_OF_MEMORY, "glAttachShader");
302 return;
303 }
304
305 /* append */
306 shProg->Shaders[n] = NULL; /* since realloc() didn't zero the new space */
307 _mesa_reference_shader(ctx, &shProg->Shaders[n], sh);
308 shProg->NumShaders++;
309 }
310
311
312 static GLuint
313 create_shader(struct gl_context *ctx, GLenum type)
314 {
315 struct gl_shader *sh;
316 GLuint name;
317
318 if (!_mesa_validate_shader_target(ctx, type)) {
319 _mesa_error(ctx, GL_INVALID_ENUM, "CreateShader(%s)",
320 _mesa_enum_to_string(type));
321 return 0;
322 }
323
324 _mesa_HashLockMutex(ctx->Shared->ShaderObjects);
325 name = _mesa_HashFindFreeKeyBlock(ctx->Shared->ShaderObjects, 1);
326 sh = _mesa_new_shader(name, _mesa_shader_enum_to_shader_stage(type));
327 sh->Type = type;
328 _mesa_HashInsertLocked(ctx->Shared->ShaderObjects, name, sh);
329 _mesa_HashUnlockMutex(ctx->Shared->ShaderObjects);
330
331 return name;
332 }
333
334
335 static GLuint
336 create_shader_program(struct gl_context *ctx)
337 {
338 GLuint name;
339 struct gl_shader_program *shProg;
340
341 _mesa_HashLockMutex(ctx->Shared->ShaderObjects);
342
343 name = _mesa_HashFindFreeKeyBlock(ctx->Shared->ShaderObjects, 1);
344
345 shProg = _mesa_new_shader_program(name);
346
347 _mesa_HashInsertLocked(ctx->Shared->ShaderObjects, name, shProg);
348
349 assert(shProg->RefCount == 1);
350
351 _mesa_HashUnlockMutex(ctx->Shared->ShaderObjects);
352
353 return name;
354 }
355
356
357 /**
358 * Delete a shader program. Actually, just decrement the program's
359 * reference count and mark it as DeletePending.
360 * Used to implement glDeleteProgram() and glDeleteObjectARB().
361 */
362 static void
363 delete_shader_program(struct gl_context *ctx, GLuint name)
364 {
365 /*
366 * NOTE: deleting shaders/programs works a bit differently than
367 * texture objects (and buffer objects, etc). Shader/program
368 * handles/IDs exist in the hash table until the object is really
369 * deleted (refcount==0). With texture objects, the handle/ID is
370 * removed from the hash table in glDeleteTextures() while the tex
371 * object itself might linger until its refcount goes to zero.
372 */
373 struct gl_shader_program *shProg;
374
375 shProg = _mesa_lookup_shader_program_err(ctx, name, "glDeleteProgram");
376 if (!shProg)
377 return;
378
379 if (!shProg->DeletePending) {
380 shProg->DeletePending = GL_TRUE;
381
382 /* effectively, decr shProg's refcount */
383 _mesa_reference_shader_program(ctx, &shProg, NULL);
384 }
385 }
386
387
388 static void
389 delete_shader(struct gl_context *ctx, GLuint shader)
390 {
391 struct gl_shader *sh;
392
393 sh = _mesa_lookup_shader_err(ctx, shader, "glDeleteShader");
394 if (!sh)
395 return;
396
397 if (!sh->DeletePending) {
398 sh->DeletePending = GL_TRUE;
399
400 /* effectively, decr sh's refcount */
401 _mesa_reference_shader(ctx, &sh, NULL);
402 }
403 }
404
405
406 static void
407 detach_shader(struct gl_context *ctx, GLuint program, GLuint shader)
408 {
409 struct gl_shader_program *shProg;
410 GLuint n;
411 GLuint i, j;
412
413 shProg = _mesa_lookup_shader_program_err(ctx, program, "glDetachShader");
414 if (!shProg)
415 return;
416
417 n = shProg->NumShaders;
418
419 for (i = 0; i < n; i++) {
420 if (shProg->Shaders[i]->Name == shader) {
421 /* found it */
422 struct gl_shader **newList;
423
424 /* release */
425 _mesa_reference_shader(ctx, &shProg->Shaders[i], NULL);
426
427 /* alloc new, smaller array */
428 newList = malloc((n - 1) * sizeof(struct gl_shader *));
429 if (!newList) {
430 _mesa_error(ctx, GL_OUT_OF_MEMORY, "glDetachShader");
431 return;
432 }
433 /* Copy old list entries to new list, skipping removed entry at [i] */
434 for (j = 0; j < i; j++) {
435 newList[j] = shProg->Shaders[j];
436 }
437 while (++i < n) {
438 newList[j++] = shProg->Shaders[i];
439 }
440
441 /* Free old list and install new one */
442 free(shProg->Shaders);
443 shProg->Shaders = newList;
444 shProg->NumShaders = n - 1;
445
446 #ifdef DEBUG
447 /* sanity check - make sure the new list's entries are sensible */
448 for (j = 0; j < shProg->NumShaders; j++) {
449 assert(shProg->Shaders[j]->Stage == MESA_SHADER_VERTEX ||
450 shProg->Shaders[j]->Stage == MESA_SHADER_TESS_CTRL ||
451 shProg->Shaders[j]->Stage == MESA_SHADER_TESS_EVAL ||
452 shProg->Shaders[j]->Stage == MESA_SHADER_GEOMETRY ||
453 shProg->Shaders[j]->Stage == MESA_SHADER_FRAGMENT);
454 assert(shProg->Shaders[j]->RefCount > 0);
455 }
456 #endif
457
458 return;
459 }
460 }
461
462 /* not found */
463 {
464 GLenum err;
465 if (is_shader(ctx, shader) || is_program(ctx, shader))
466 err = GL_INVALID_OPERATION;
467 else
468 err = GL_INVALID_VALUE;
469 _mesa_error(ctx, err, "glDetachShader(shader)");
470 return;
471 }
472 }
473
474
475 /**
476 * Return list of shaders attached to shader program.
477 */
478 static void
479 get_attached_shaders(struct gl_context *ctx, GLuint program, GLsizei maxCount,
480 GLsizei *count, GLuint *obj)
481 {
482 struct gl_shader_program *shProg;
483
484 if (maxCount < 0) {
485 _mesa_error(ctx, GL_INVALID_VALUE, "glGetAttachedShaders(maxCount < 0)");
486 return;
487 }
488
489 shProg =
490 _mesa_lookup_shader_program_err(ctx, program, "glGetAttachedShaders");
491
492 if (shProg) {
493 GLuint i;
494 for (i = 0; i < (GLuint) maxCount && i < shProg->NumShaders; i++) {
495 obj[i] = shProg->Shaders[i]->Name;
496 }
497 if (count)
498 *count = i;
499 }
500 }
501
502
503 /**
504 * glGetHandleARB() - return ID/name of currently bound shader program.
505 */
506 static GLuint
507 get_handle(struct gl_context *ctx, GLenum pname)
508 {
509 if (pname == GL_PROGRAM_OBJECT_ARB) {
510 if (ctx->_Shader->ActiveProgram)
511 return ctx->_Shader->ActiveProgram->Name;
512 else
513 return 0;
514 }
515 else {
516 _mesa_error(ctx, GL_INVALID_ENUM, "glGetHandleARB");
517 return 0;
518 }
519 }
520
521
522 /**
523 * Check if a geometry shader query is valid at this time. If not, report an
524 * error and return false.
525 *
526 * From GL 3.2 section 6.1.16 (Shader and Program Queries):
527 *
528 * "If GEOMETRY_VERTICES_OUT, GEOMETRY_INPUT_TYPE, or GEOMETRY_OUTPUT_TYPE
529 * are queried for a program which has not been linked successfully, or
530 * which does not contain objects to form a geometry shader, then an
531 * INVALID_OPERATION error is generated."
532 */
533 static bool
534 check_gs_query(struct gl_context *ctx, const struct gl_shader_program *shProg)
535 {
536 if (shProg->data->LinkStatus &&
537 shProg->_LinkedShaders[MESA_SHADER_GEOMETRY] != NULL) {
538 return true;
539 }
540
541 _mesa_error(ctx, GL_INVALID_OPERATION,
542 "glGetProgramv(linked geometry shader required)");
543 return false;
544 }
545
546
547 /**
548 * Check if a tessellation control shader query is valid at this time.
549 * If not, report an error and return false.
550 *
551 * From GL 4.0 section 6.1.12 (Shader and Program Queries):
552 *
553 * "If TESS_CONTROL_OUTPUT_VERTICES is queried for a program which has
554 * not been linked successfully, or which does not contain objects to
555 * form a tessellation control shader, then an INVALID_OPERATION error is
556 * generated."
557 */
558 static bool
559 check_tcs_query(struct gl_context *ctx, const struct gl_shader_program *shProg)
560 {
561 if (shProg->data->LinkStatus &&
562 shProg->_LinkedShaders[MESA_SHADER_TESS_CTRL] != NULL) {
563 return true;
564 }
565
566 _mesa_error(ctx, GL_INVALID_OPERATION,
567 "glGetProgramv(linked tessellation control shader required)");
568 return false;
569 }
570
571
572 /**
573 * Check if a tessellation evaluation shader query is valid at this time.
574 * If not, report an error and return false.
575 *
576 * From GL 4.0 section 6.1.12 (Shader and Program Queries):
577 *
578 * "If any of the pname values in this paragraph are queried for a program
579 * which has not been linked successfully, or which does not contain
580 * objects to form a tessellation evaluation shader, then an
581 * INVALID_OPERATION error is generated."
582 *
583 */
584 static bool
585 check_tes_query(struct gl_context *ctx, const struct gl_shader_program *shProg)
586 {
587 if (shProg->data->LinkStatus &&
588 shProg->_LinkedShaders[MESA_SHADER_TESS_EVAL] != NULL) {
589 return true;
590 }
591
592 _mesa_error(ctx, GL_INVALID_OPERATION, "glGetProgramv(linked tessellation "
593 "evaluation shader required)");
594 return false;
595 }
596
597
598 /**
599 * glGetProgramiv() - get shader program state.
600 * Note that this is for GLSL shader programs, not ARB vertex/fragment
601 * programs (see glGetProgramivARB).
602 */
603 static void
604 get_programiv(struct gl_context *ctx, GLuint program, GLenum pname,
605 GLint *params)
606 {
607 struct gl_shader_program *shProg
608 = _mesa_lookup_shader_program_err(ctx, program, "glGetProgramiv(program)");
609
610 /* Is transform feedback available in this context?
611 */
612 const bool has_xfb =
613 (ctx->API == API_OPENGL_COMPAT && ctx->Extensions.EXT_transform_feedback)
614 || ctx->API == API_OPENGL_CORE
615 || _mesa_is_gles3(ctx);
616
617 /* True if geometry shaders (of the form that was adopted into GLSL 1.50
618 * and GL 3.2) are available in this context
619 */
620 const bool has_core_gs = _mesa_has_geometry_shaders(ctx);
621 const bool has_tess = _mesa_has_tessellation(ctx);
622
623 /* Are uniform buffer objects available in this context?
624 */
625 const bool has_ubo =
626 (ctx->API == API_OPENGL_COMPAT &&
627 ctx->Extensions.ARB_uniform_buffer_object)
628 || ctx->API == API_OPENGL_CORE
629 || _mesa_is_gles3(ctx);
630
631 if (!shProg) {
632 return;
633 }
634
635 switch (pname) {
636 case GL_DELETE_STATUS:
637 *params = shProg->DeletePending;
638 return;
639 case GL_LINK_STATUS:
640 *params = shProg->data->LinkStatus;
641 return;
642 case GL_VALIDATE_STATUS:
643 *params = shProg->data->Validated;
644 return;
645 case GL_INFO_LOG_LENGTH:
646 *params = (shProg->data->InfoLog && shProg->data->InfoLog[0] != '\0') ?
647 strlen(shProg->data->InfoLog) + 1 : 0;
648 return;
649 case GL_ATTACHED_SHADERS:
650 *params = shProg->NumShaders;
651 return;
652 case GL_ACTIVE_ATTRIBUTES:
653 *params = _mesa_count_active_attribs(shProg);
654 return;
655 case GL_ACTIVE_ATTRIBUTE_MAX_LENGTH:
656 *params = _mesa_longest_attribute_name_length(shProg);
657 return;
658 case GL_ACTIVE_UNIFORMS: {
659 unsigned i;
660 const unsigned num_uniforms =
661 shProg->data->NumUniformStorage - shProg->data->NumHiddenUniforms;
662 for (*params = 0, i = 0; i < num_uniforms; i++) {
663 if (!shProg->data->UniformStorage[i].is_shader_storage)
664 (*params)++;
665 }
666 return;
667 }
668 case GL_ACTIVE_UNIFORM_MAX_LENGTH: {
669 unsigned i;
670 GLint max_len = 0;
671 const unsigned num_uniforms =
672 shProg->data->NumUniformStorage - shProg->data->NumHiddenUniforms;
673
674 for (i = 0; i < num_uniforms; i++) {
675 if (shProg->data->UniformStorage[i].is_shader_storage)
676 continue;
677
678 /* Add one for the terminating NUL character for a non-array, and
679 * 4 for the "[0]" and the NUL for an array.
680 */
681 const GLint len = strlen(shProg->data->UniformStorage[i].name) + 1 +
682 ((shProg->data->UniformStorage[i].array_elements != 0) ? 3 : 0);
683
684 if (len > max_len)
685 max_len = len;
686 }
687
688 *params = max_len;
689 return;
690 }
691 case GL_TRANSFORM_FEEDBACK_VARYINGS:
692 if (!has_xfb)
693 break;
694 *params = shProg->TransformFeedback.NumVarying;
695 return;
696 case GL_TRANSFORM_FEEDBACK_VARYING_MAX_LENGTH: {
697 unsigned i;
698 GLint max_len = 0;
699 if (!has_xfb)
700 break;
701
702 for (i = 0; i < shProg->TransformFeedback.NumVarying; i++) {
703 /* Add one for the terminating NUL character.
704 */
705 const GLint len =
706 strlen(shProg->TransformFeedback.VaryingNames[i]) + 1;
707
708 if (len > max_len)
709 max_len = len;
710 }
711
712 *params = max_len;
713 return;
714 }
715 case GL_TRANSFORM_FEEDBACK_BUFFER_MODE:
716 if (!has_xfb)
717 break;
718 *params = shProg->TransformFeedback.BufferMode;
719 return;
720 case GL_GEOMETRY_VERTICES_OUT:
721 if (!has_core_gs)
722 break;
723 if (check_gs_query(ctx, shProg)) {
724 *params = shProg->_LinkedShaders[MESA_SHADER_GEOMETRY]->
725 info.Geom.VerticesOut;
726 }
727 return;
728 case GL_GEOMETRY_SHADER_INVOCATIONS:
729 if (!has_core_gs || !ctx->Extensions.ARB_gpu_shader5)
730 break;
731 if (check_gs_query(ctx, shProg)) {
732 *params = shProg->_LinkedShaders[MESA_SHADER_GEOMETRY]->
733 info.Geom.Invocations;
734 }
735 return;
736 case GL_GEOMETRY_INPUT_TYPE:
737 if (!has_core_gs)
738 break;
739 if (check_gs_query(ctx, shProg)) {
740 *params = shProg->_LinkedShaders[MESA_SHADER_GEOMETRY]->
741 info.Geom.InputType;
742 }
743 return;
744 case GL_GEOMETRY_OUTPUT_TYPE:
745 if (!has_core_gs)
746 break;
747 if (check_gs_query(ctx, shProg)) {
748 *params = shProg->_LinkedShaders[MESA_SHADER_GEOMETRY]->
749 info.Geom.OutputType;
750 }
751 return;
752 case GL_ACTIVE_UNIFORM_BLOCK_MAX_NAME_LENGTH: {
753 unsigned i;
754 GLint max_len = 0;
755
756 if (!has_ubo)
757 break;
758
759 for (i = 0; i < shProg->data->NumUniformBlocks; i++) {
760 /* Add one for the terminating NUL character.
761 */
762 const GLint len = strlen(shProg->data->UniformBlocks[i].Name) + 1;
763
764 if (len > max_len)
765 max_len = len;
766 }
767
768 *params = max_len;
769 return;
770 }
771 case GL_ACTIVE_UNIFORM_BLOCKS:
772 if (!has_ubo)
773 break;
774
775 *params = shProg->data->NumUniformBlocks;
776 return;
777 case GL_PROGRAM_BINARY_RETRIEVABLE_HINT:
778 /* This enum isn't part of the OES extension for OpenGL ES 2.0. It is
779 * only available with desktop OpenGL 3.0+ with the
780 * GL_ARB_get_program_binary extension or OpenGL ES 3.0.
781 *
782 * On desktop, we ignore the 3.0+ requirement because it is silly.
783 */
784 if (!_mesa_is_desktop_gl(ctx) && !_mesa_is_gles3(ctx))
785 break;
786
787 *params = shProg->BinaryRetreivableHint;
788 return;
789 case GL_PROGRAM_BINARY_LENGTH:
790 *params = 0;
791 return;
792 case GL_ACTIVE_ATOMIC_COUNTER_BUFFERS:
793 if (!ctx->Extensions.ARB_shader_atomic_counters)
794 break;
795
796 *params = shProg->data->NumAtomicBuffers;
797 return;
798 case GL_COMPUTE_WORK_GROUP_SIZE: {
799 int i;
800 if (!_mesa_has_compute_shaders(ctx))
801 break;
802 if (!shProg->data->LinkStatus) {
803 _mesa_error(ctx, GL_INVALID_OPERATION, "glGetProgramiv(program not "
804 "linked)");
805 return;
806 }
807 if (shProg->_LinkedShaders[MESA_SHADER_COMPUTE] == NULL) {
808 _mesa_error(ctx, GL_INVALID_OPERATION, "glGetProgramiv(no compute "
809 "shaders)");
810 return;
811 }
812 for (i = 0; i < 3; i++)
813 params[i] = shProg->Comp.LocalSize[i];
814 return;
815 }
816 case GL_PROGRAM_SEPARABLE:
817 /* If the program has not been linked, return initial value 0. */
818 *params = (shProg->data->LinkStatus == GL_FALSE) ? 0 : shProg->SeparateShader;
819 return;
820
821 /* ARB_tessellation_shader */
822 case GL_TESS_CONTROL_OUTPUT_VERTICES:
823 if (!has_tess)
824 break;
825 if (check_tcs_query(ctx, shProg)) {
826 *params = shProg->_LinkedShaders[MESA_SHADER_TESS_CTRL]->
827 info.TessCtrl.VerticesOut;
828 }
829 return;
830 case GL_TESS_GEN_MODE:
831 if (!has_tess)
832 break;
833 if (check_tes_query(ctx, shProg)) {
834 *params = shProg->_LinkedShaders[MESA_SHADER_TESS_EVAL]->
835 info.TessEval.PrimitiveMode;
836 }
837 return;
838 case GL_TESS_GEN_SPACING:
839 if (!has_tess)
840 break;
841 if (check_tes_query(ctx, shProg)) {
842 *params = shProg->_LinkedShaders[MESA_SHADER_TESS_EVAL]->
843 info.TessEval.Spacing;
844 }
845 return;
846 case GL_TESS_GEN_VERTEX_ORDER:
847 if (!has_tess)
848 break;
849 if (check_tes_query(ctx, shProg)) {
850 *params = shProg->_LinkedShaders[MESA_SHADER_TESS_EVAL]->
851 info.TessEval.VertexOrder;
852 }
853 return;
854 case GL_TESS_GEN_POINT_MODE:
855 if (!has_tess)
856 break;
857 if (check_tes_query(ctx, shProg)) {
858 *params = shProg->_LinkedShaders[MESA_SHADER_TESS_EVAL]->
859 info.TessEval.PointMode;
860 }
861 return;
862 default:
863 break;
864 }
865
866 _mesa_error(ctx, GL_INVALID_ENUM, "glGetProgramiv(pname=%s)",
867 _mesa_enum_to_string(pname));
868 }
869
870
871 /**
872 * glGetShaderiv() - get GLSL shader state
873 */
874 static void
875 get_shaderiv(struct gl_context *ctx, GLuint name, GLenum pname, GLint *params)
876 {
877 struct gl_shader *shader =
878 _mesa_lookup_shader_err(ctx, name, "glGetShaderiv");
879
880 if (!shader) {
881 return;
882 }
883
884 switch (pname) {
885 case GL_SHADER_TYPE:
886 *params = shader->Type;
887 break;
888 case GL_DELETE_STATUS:
889 *params = shader->DeletePending;
890 break;
891 case GL_COMPILE_STATUS:
892 *params = shader->CompileStatus;
893 break;
894 case GL_INFO_LOG_LENGTH:
895 *params = (shader->InfoLog && shader->InfoLog[0] != '\0') ?
896 strlen(shader->InfoLog) + 1 : 0;
897 break;
898 case GL_SHADER_SOURCE_LENGTH:
899 *params = shader->Source ? strlen((char *) shader->Source) + 1 : 0;
900 break;
901 default:
902 _mesa_error(ctx, GL_INVALID_ENUM, "glGetShaderiv(pname)");
903 return;
904 }
905 }
906
907
908 static void
909 get_program_info_log(struct gl_context *ctx, GLuint program, GLsizei bufSize,
910 GLsizei *length, GLchar *infoLog)
911 {
912 struct gl_shader_program *shProg;
913
914 /* Section 2.5 GL Errors (page 18) of the OpenGL ES 3.0.4 spec and
915 * section 2.3.1 (Errors) of the OpenGL 4.5 spec say:
916 *
917 * "If a negative number is provided where an argument of type sizei or
918 * sizeiptr is specified, an INVALID_VALUE error is generated."
919 */
920 if (bufSize < 0) {
921 _mesa_error(ctx, GL_INVALID_VALUE, "glGetProgramInfoLog(bufSize < 0)");
922 return;
923 }
924
925 shProg = _mesa_lookup_shader_program_err(ctx, program,
926 "glGetProgramInfoLog(program)");
927 if (!shProg) {
928 return;
929 }
930
931 _mesa_copy_string(infoLog, bufSize, length, shProg->data->InfoLog);
932 }
933
934
935 static void
936 get_shader_info_log(struct gl_context *ctx, GLuint shader, GLsizei bufSize,
937 GLsizei *length, GLchar *infoLog)
938 {
939 struct gl_shader *sh;
940
941 /* Section 2.5 GL Errors (page 18) of the OpenGL ES 3.0.4 spec and
942 * section 2.3.1 (Errors) of the OpenGL 4.5 spec say:
943 *
944 * "If a negative number is provided where an argument of type sizei or
945 * sizeiptr is specified, an INVALID_VALUE error is generated."
946 */
947 if (bufSize < 0) {
948 _mesa_error(ctx, GL_INVALID_VALUE, "glGetShaderInfoLog(bufSize < 0)");
949 return;
950 }
951
952 sh = _mesa_lookup_shader_err(ctx, shader, "glGetShaderInfoLog(shader)");
953 if (!sh) {
954 return;
955 }
956
957 _mesa_copy_string(infoLog, bufSize, length, sh->InfoLog);
958 }
959
960
961 /**
962 * Return shader source code.
963 */
964 static void
965 get_shader_source(struct gl_context *ctx, GLuint shader, GLsizei maxLength,
966 GLsizei *length, GLchar *sourceOut)
967 {
968 struct gl_shader *sh;
969
970 if (maxLength < 0) {
971 _mesa_error(ctx, GL_INVALID_VALUE, "glGetShaderSource(bufSize < 0)");
972 return;
973 }
974
975 sh = _mesa_lookup_shader_err(ctx, shader, "glGetShaderSource");
976 if (!sh) {
977 return;
978 }
979 _mesa_copy_string(sourceOut, maxLength, length, sh->Source);
980 }
981
982
983 /**
984 * Set/replace shader source code. A helper function used by
985 * glShaderSource[ARB].
986 */
987 static void
988 shader_source(struct gl_shader *sh, const GLchar *source)
989 {
990 assert(sh);
991
992 /* free old shader source string and install new one */
993 free((void *)sh->Source);
994 sh->Source = source;
995 #ifdef DEBUG
996 sh->SourceChecksum = util_hash_crc32(sh->Source, strlen(sh->Source));
997 #endif
998 }
999
1000
1001 /**
1002 * Compile a shader.
1003 */
1004 void
1005 _mesa_compile_shader(struct gl_context *ctx, struct gl_shader *sh)
1006 {
1007 if (!sh)
1008 return;
1009
1010 if (!sh->Source) {
1011 /* If the user called glCompileShader without first calling
1012 * glShaderSource, we should fail to compile, but not raise a GL_ERROR.
1013 */
1014 sh->CompileStatus = GL_FALSE;
1015 } else {
1016 if (ctx->_Shader->Flags & GLSL_DUMP) {
1017 _mesa_log("GLSL source for %s shader %d:\n",
1018 _mesa_shader_stage_to_string(sh->Stage), sh->Name);
1019 _mesa_log("%s\n", sh->Source);
1020 }
1021
1022 /* this call will set the shader->CompileStatus field to indicate if
1023 * compilation was successful.
1024 */
1025 _mesa_glsl_compile_shader(ctx, sh, false, false);
1026
1027 if (ctx->_Shader->Flags & GLSL_LOG) {
1028 _mesa_write_shader_to_file(sh);
1029 }
1030
1031 if (ctx->_Shader->Flags & GLSL_DUMP) {
1032 if (sh->CompileStatus) {
1033 if (sh->ir) {
1034 _mesa_log("GLSL IR for shader %d:\n", sh->Name);
1035 _mesa_print_ir(_mesa_get_log_file(), sh->ir, NULL);
1036 } else {
1037 _mesa_log("No GLSL IR for shader %d (shader may be from "
1038 "cache)\n", sh->Name);
1039 }
1040 _mesa_log("\n\n");
1041 } else {
1042 _mesa_log("GLSL shader %d failed to compile.\n", sh->Name);
1043 }
1044 if (sh->InfoLog && sh->InfoLog[0] != 0) {
1045 _mesa_log("GLSL shader %d info log:\n", sh->Name);
1046 _mesa_log("%s\n", sh->InfoLog);
1047 }
1048 }
1049 }
1050
1051 if (!sh->CompileStatus) {
1052 if (ctx->_Shader->Flags & GLSL_DUMP_ON_ERROR) {
1053 _mesa_log("GLSL source for %s shader %d:\n",
1054 _mesa_shader_stage_to_string(sh->Stage), sh->Name);
1055 _mesa_log("%s\n", sh->Source);
1056 _mesa_log("Info Log:\n%s\n", sh->InfoLog);
1057 }
1058
1059 if (ctx->_Shader->Flags & GLSL_REPORT_ERRORS) {
1060 _mesa_debug(ctx, "Error compiling shader %u:\n%s\n",
1061 sh->Name, sh->InfoLog);
1062 }
1063 }
1064 }
1065
1066
1067 /**
1068 * Link a program's shaders.
1069 */
1070 void
1071 _mesa_link_program(struct gl_context *ctx, struct gl_shader_program *shProg)
1072 {
1073 if (!shProg)
1074 return;
1075
1076 /* From the ARB_transform_feedback2 specification:
1077 * "The error INVALID_OPERATION is generated by LinkProgram if <program> is
1078 * the name of a program being used by one or more transform feedback
1079 * objects, even if the objects are not currently bound or are paused."
1080 */
1081 if (_mesa_transform_feedback_is_using_program(ctx, shProg)) {
1082 _mesa_error(ctx, GL_INVALID_OPERATION,
1083 "glLinkProgram(transform feedback is using the program)");
1084 return;
1085 }
1086
1087 FLUSH_VERTICES(ctx, _NEW_PROGRAM);
1088
1089 _mesa_glsl_link_shader(ctx, shProg);
1090
1091 /* Capture .shader_test files. */
1092 const char *capture_path = _mesa_get_shader_capture_path();
1093 if (shProg->Name != 0 && shProg->Name != ~0 && capture_path != NULL) {
1094 FILE *file;
1095 char *filename = ralloc_asprintf(NULL, "%s/%u.shader_test",
1096 capture_path, shProg->Name);
1097 file = fopen(filename, "w");
1098 if (file) {
1099 fprintf(file, "[require]\nGLSL%s >= %u.%02u\n",
1100 shProg->IsES ? " ES" : "",
1101 shProg->data->Version / 100, shProg->data->Version % 100);
1102 if (shProg->SeparateShader)
1103 fprintf(file, "GL_ARB_separate_shader_objects\nSSO ENABLED\n");
1104 fprintf(file, "\n");
1105
1106 for (unsigned i = 0; i < shProg->NumShaders; i++) {
1107 fprintf(file, "[%s shader]\n%s\n",
1108 _mesa_shader_stage_to_string(shProg->Shaders[i]->Stage),
1109 shProg->Shaders[i]->Source);
1110 }
1111 fclose(file);
1112 } else {
1113 _mesa_warning(ctx, "Failed to open %s", filename);
1114 }
1115
1116 ralloc_free(filename);
1117 }
1118
1119 if (shProg->data->LinkStatus == GL_FALSE &&
1120 (ctx->_Shader->Flags & GLSL_REPORT_ERRORS)) {
1121 _mesa_debug(ctx, "Error linking program %u:\n%s\n",
1122 shProg->Name, shProg->data->InfoLog);
1123 }
1124
1125 /* debug code */
1126 if (0) {
1127 GLuint i;
1128
1129 printf("Link %u shaders in program %u: %s\n",
1130 shProg->NumShaders, shProg->Name,
1131 shProg->data->LinkStatus ? "Success" : "Failed");
1132
1133 for (i = 0; i < shProg->NumShaders; i++) {
1134 printf(" shader %u, stage %u\n",
1135 shProg->Shaders[i]->Name,
1136 shProg->Shaders[i]->Stage);
1137 }
1138 }
1139 }
1140
1141
1142 /**
1143 * Print basic shader info (for debug).
1144 */
1145 static void
1146 print_shader_info(const struct gl_shader_program *shProg)
1147 {
1148 GLuint i;
1149
1150 printf("Mesa: glUseProgram(%u)\n", shProg->Name);
1151 for (i = 0; i < shProg->NumShaders; i++) {
1152 #ifdef DEBUG
1153 printf(" %s shader %u, checksum %u\n",
1154 _mesa_shader_stage_to_string(shProg->Shaders[i]->Stage),
1155 shProg->Shaders[i]->Name,
1156 shProg->Shaders[i]->SourceChecksum);
1157 #else
1158 printf(" %s shader %u\n",
1159 _mesa_shader_stage_to_string(shProg->Shaders[i]->Stage),
1160 shProg->Shaders[i]->Name);
1161 #endif
1162 }
1163 if (shProg->_LinkedShaders[MESA_SHADER_VERTEX])
1164 printf(" vert prog %u\n",
1165 shProg->_LinkedShaders[MESA_SHADER_VERTEX]->Program->Id);
1166 if (shProg->_LinkedShaders[MESA_SHADER_FRAGMENT])
1167 printf(" frag prog %u\n",
1168 shProg->_LinkedShaders[MESA_SHADER_FRAGMENT]->Program->Id);
1169 if (shProg->_LinkedShaders[MESA_SHADER_GEOMETRY])
1170 printf(" geom prog %u\n",
1171 shProg->_LinkedShaders[MESA_SHADER_GEOMETRY]->Program->Id);
1172 if (shProg->_LinkedShaders[MESA_SHADER_TESS_CTRL])
1173 printf(" tesc prog %u\n",
1174 shProg->_LinkedShaders[MESA_SHADER_TESS_CTRL]->Program->Id);
1175 if (shProg->_LinkedShaders[MESA_SHADER_TESS_EVAL])
1176 printf(" tese prog %u\n",
1177 shProg->_LinkedShaders[MESA_SHADER_TESS_EVAL]->Program->Id);
1178 }
1179
1180
1181 /**
1182 * Use the named shader program for subsequent glUniform calls
1183 */
1184 void
1185 _mesa_active_program(struct gl_context *ctx, struct gl_shader_program *shProg,
1186 const char *caller)
1187 {
1188 if ((shProg != NULL) && !shProg->data->LinkStatus) {
1189 _mesa_error(ctx, GL_INVALID_OPERATION,
1190 "%s(program %u not linked)", caller, shProg->Name);
1191 return;
1192 }
1193
1194 if (ctx->Shader.ActiveProgram != shProg) {
1195 _mesa_reference_shader_program(ctx, &ctx->Shader.ActiveProgram, shProg);
1196 }
1197 }
1198
1199
1200 static void
1201 use_shader_program(struct gl_context *ctx, gl_shader_stage stage,
1202 struct gl_shader_program *shProg,
1203 struct gl_pipeline_object *shTarget)
1204 {
1205 struct gl_shader_program **target;
1206
1207 target = &shTarget->CurrentProgram[stage];
1208 if ((shProg != NULL) && (shProg->_LinkedShaders[stage] == NULL))
1209 shProg = NULL;
1210
1211 if (shProg)
1212 _mesa_shader_program_init_subroutine_defaults(ctx, shProg);
1213
1214 if (*target != shProg) {
1215 /* Program is current, flush it */
1216 if (shTarget == ctx->_Shader) {
1217 FLUSH_VERTICES(ctx, _NEW_PROGRAM | _NEW_PROGRAM_CONSTANTS);
1218 }
1219
1220 /* If the shader is also bound as the current rendering shader, unbind
1221 * it from that binding point as well. This ensures that the correct
1222 * semantics of glDeleteProgram are maintained.
1223 */
1224 switch (stage) {
1225 case MESA_SHADER_VERTEX:
1226 case MESA_SHADER_TESS_CTRL:
1227 case MESA_SHADER_TESS_EVAL:
1228 case MESA_SHADER_GEOMETRY:
1229 case MESA_SHADER_COMPUTE:
1230 /* Empty for now. */
1231 break;
1232 case MESA_SHADER_FRAGMENT:
1233 if (*target == ctx->_Shader->_CurrentFragmentProgram) {
1234 _mesa_reference_shader_program(ctx,
1235 &ctx->_Shader->_CurrentFragmentProgram,
1236 NULL);
1237 }
1238 break;
1239 }
1240
1241 _mesa_reference_shader_program(ctx, target, shProg);
1242 return;
1243 }
1244 }
1245
1246
1247 /**
1248 * Use the named shader program for subsequent rendering.
1249 */
1250 void
1251 _mesa_use_program(struct gl_context *ctx, struct gl_shader_program *shProg)
1252 {
1253 int i;
1254 for (i = 0; i < MESA_SHADER_STAGES; i++)
1255 use_shader_program(ctx, i, shProg, &ctx->Shader);
1256 _mesa_active_program(ctx, shProg, "glUseProgram");
1257 }
1258
1259
1260 /**
1261 * Do validation of the given shader program.
1262 * \param errMsg returns error message if validation fails.
1263 * \return GL_TRUE if valid, GL_FALSE if invalid (and set errMsg)
1264 */
1265 static GLboolean
1266 validate_shader_program(const struct gl_shader_program *shProg,
1267 char *errMsg)
1268 {
1269 if (!shProg->data->LinkStatus) {
1270 return GL_FALSE;
1271 }
1272
1273 /* From the GL spec, a program is invalid if any of these are true:
1274
1275 any two active samplers in the current program object are of
1276 different types, but refer to the same texture image unit,
1277
1278 any active sampler in the current program object refers to a texture
1279 image unit where fixed-function fragment processing accesses a
1280 texture target that does not match the sampler type, or
1281
1282 the sum of the number of active samplers in the program and the
1283 number of texture image units enabled for fixed-function fragment
1284 processing exceeds the combined limit on the total number of texture
1285 image units allowed.
1286 */
1287
1288 /*
1289 * Check: any two active samplers in the current program object are of
1290 * different types, but refer to the same texture image unit,
1291 */
1292 if (!_mesa_sampler_uniforms_are_valid(shProg, errMsg, 100))
1293 return GL_FALSE;
1294
1295 return GL_TRUE;
1296 }
1297
1298
1299 /**
1300 * Called via glValidateProgram()
1301 */
1302 static void
1303 validate_program(struct gl_context *ctx, GLuint program)
1304 {
1305 struct gl_shader_program *shProg;
1306 char errMsg[100] = "";
1307
1308 shProg = _mesa_lookup_shader_program_err(ctx, program, "glValidateProgram");
1309 if (!shProg) {
1310 return;
1311 }
1312
1313 shProg->data->Validated = validate_shader_program(shProg, errMsg);
1314 if (!shProg->data->Validated) {
1315 /* update info log */
1316 if (shProg->data->InfoLog) {
1317 ralloc_free(shProg->data->InfoLog);
1318 }
1319 shProg->data->InfoLog = ralloc_strdup(shProg->data, errMsg);
1320 }
1321 }
1322
1323
1324
1325 void GLAPIENTRY
1326 _mesa_AttachObjectARB(GLhandleARB program, GLhandleARB shader)
1327 {
1328 GET_CURRENT_CONTEXT(ctx);
1329 attach_shader(ctx, program, shader);
1330 }
1331
1332
1333 void GLAPIENTRY
1334 _mesa_AttachShader(GLuint program, GLuint shader)
1335 {
1336 GET_CURRENT_CONTEXT(ctx);
1337 attach_shader(ctx, program, shader);
1338 }
1339
1340
1341 void GLAPIENTRY
1342 _mesa_CompileShader(GLuint shaderObj)
1343 {
1344 GET_CURRENT_CONTEXT(ctx);
1345 if (MESA_VERBOSE & VERBOSE_API)
1346 _mesa_debug(ctx, "glCompileShader %u\n", shaderObj);
1347 _mesa_compile_shader(ctx, _mesa_lookup_shader_err(ctx, shaderObj,
1348 "glCompileShader"));
1349 }
1350
1351
1352 GLuint GLAPIENTRY
1353 _mesa_CreateShader(GLenum type)
1354 {
1355 GET_CURRENT_CONTEXT(ctx);
1356 if (MESA_VERBOSE & VERBOSE_API)
1357 _mesa_debug(ctx, "glCreateShader %s\n", _mesa_enum_to_string(type));
1358 return create_shader(ctx, type);
1359 }
1360
1361
1362 GLhandleARB GLAPIENTRY
1363 _mesa_CreateShaderObjectARB(GLenum type)
1364 {
1365 GET_CURRENT_CONTEXT(ctx);
1366 return create_shader(ctx, type);
1367 }
1368
1369
1370 GLuint GLAPIENTRY
1371 _mesa_CreateProgram(void)
1372 {
1373 GET_CURRENT_CONTEXT(ctx);
1374 if (MESA_VERBOSE & VERBOSE_API)
1375 _mesa_debug(ctx, "glCreateProgram\n");
1376 return create_shader_program(ctx);
1377 }
1378
1379
1380 GLhandleARB GLAPIENTRY
1381 _mesa_CreateProgramObjectARB(void)
1382 {
1383 GET_CURRENT_CONTEXT(ctx);
1384 return create_shader_program(ctx);
1385 }
1386
1387
1388 void GLAPIENTRY
1389 _mesa_DeleteObjectARB(GLhandleARB obj)
1390 {
1391 if (MESA_VERBOSE & VERBOSE_API) {
1392 GET_CURRENT_CONTEXT(ctx);
1393 _mesa_debug(ctx, "glDeleteObjectARB(%lu)\n", (unsigned long)obj);
1394 }
1395
1396 if (obj) {
1397 GET_CURRENT_CONTEXT(ctx);
1398 FLUSH_VERTICES(ctx, 0);
1399 if (is_program(ctx, obj)) {
1400 delete_shader_program(ctx, obj);
1401 }
1402 else if (is_shader(ctx, obj)) {
1403 delete_shader(ctx, obj);
1404 }
1405 else {
1406 /* error? */
1407 }
1408 }
1409 }
1410
1411
1412 void GLAPIENTRY
1413 _mesa_DeleteProgram(GLuint name)
1414 {
1415 if (name) {
1416 GET_CURRENT_CONTEXT(ctx);
1417 FLUSH_VERTICES(ctx, 0);
1418 delete_shader_program(ctx, name);
1419 }
1420 }
1421
1422
1423 void GLAPIENTRY
1424 _mesa_DeleteShader(GLuint name)
1425 {
1426 if (name) {
1427 GET_CURRENT_CONTEXT(ctx);
1428 FLUSH_VERTICES(ctx, 0);
1429 delete_shader(ctx, name);
1430 }
1431 }
1432
1433
1434 void GLAPIENTRY
1435 _mesa_DetachObjectARB(GLhandleARB program, GLhandleARB shader)
1436 {
1437 GET_CURRENT_CONTEXT(ctx);
1438 detach_shader(ctx, program, shader);
1439 }
1440
1441
1442 void GLAPIENTRY
1443 _mesa_DetachShader(GLuint program, GLuint shader)
1444 {
1445 GET_CURRENT_CONTEXT(ctx);
1446 detach_shader(ctx, program, shader);
1447 }
1448
1449
1450 void GLAPIENTRY
1451 _mesa_GetAttachedObjectsARB(GLhandleARB container, GLsizei maxCount,
1452 GLsizei * count, GLhandleARB * obj)
1453 {
1454 GET_CURRENT_CONTEXT(ctx);
1455 get_attached_shaders(ctx, container, maxCount, count, obj);
1456 }
1457
1458
1459 void GLAPIENTRY
1460 _mesa_GetAttachedShaders(GLuint program, GLsizei maxCount,
1461 GLsizei *count, GLuint *obj)
1462 {
1463 GET_CURRENT_CONTEXT(ctx);
1464 get_attached_shaders(ctx, program, maxCount, count, obj);
1465 }
1466
1467
1468 void GLAPIENTRY
1469 _mesa_GetInfoLogARB(GLhandleARB object, GLsizei maxLength, GLsizei * length,
1470 GLcharARB * infoLog)
1471 {
1472 GET_CURRENT_CONTEXT(ctx);
1473 if (is_program(ctx, object)) {
1474 get_program_info_log(ctx, object, maxLength, length, infoLog);
1475 }
1476 else if (is_shader(ctx, object)) {
1477 get_shader_info_log(ctx, object, maxLength, length, infoLog);
1478 }
1479 else {
1480 _mesa_error(ctx, GL_INVALID_OPERATION, "glGetInfoLogARB");
1481 }
1482 }
1483
1484
1485 void GLAPIENTRY
1486 _mesa_GetObjectParameterivARB(GLhandleARB object, GLenum pname, GLint *params)
1487 {
1488 GET_CURRENT_CONTEXT(ctx);
1489 /* Implement in terms of GetProgramiv, GetShaderiv */
1490 if (is_program(ctx, object)) {
1491 if (pname == GL_OBJECT_TYPE_ARB) {
1492 *params = GL_PROGRAM_OBJECT_ARB;
1493 }
1494 else {
1495 get_programiv(ctx, object, pname, params);
1496 }
1497 }
1498 else if (is_shader(ctx, object)) {
1499 if (pname == GL_OBJECT_TYPE_ARB) {
1500 *params = GL_SHADER_OBJECT_ARB;
1501 }
1502 else {
1503 get_shaderiv(ctx, object, pname, params);
1504 }
1505 }
1506 else {
1507 _mesa_error(ctx, GL_INVALID_VALUE, "glGetObjectParameterivARB");
1508 }
1509 }
1510
1511
1512 void GLAPIENTRY
1513 _mesa_GetObjectParameterfvARB(GLhandleARB object, GLenum pname,
1514 GLfloat *params)
1515 {
1516 GLint iparams[1] = {0}; /* XXX is one element enough? */
1517 _mesa_GetObjectParameterivARB(object, pname, iparams);
1518 params[0] = (GLfloat) iparams[0];
1519 }
1520
1521
1522 void GLAPIENTRY
1523 _mesa_GetProgramiv(GLuint program, GLenum pname, GLint *params)
1524 {
1525 GET_CURRENT_CONTEXT(ctx);
1526 get_programiv(ctx, program, pname, params);
1527 }
1528
1529
1530 void GLAPIENTRY
1531 _mesa_GetShaderiv(GLuint shader, GLenum pname, GLint *params)
1532 {
1533 GET_CURRENT_CONTEXT(ctx);
1534 get_shaderiv(ctx, shader, pname, params);
1535 }
1536
1537
1538 void GLAPIENTRY
1539 _mesa_GetProgramInfoLog(GLuint program, GLsizei bufSize,
1540 GLsizei *length, GLchar *infoLog)
1541 {
1542 GET_CURRENT_CONTEXT(ctx);
1543 get_program_info_log(ctx, program, bufSize, length, infoLog);
1544 }
1545
1546
1547 void GLAPIENTRY
1548 _mesa_GetShaderInfoLog(GLuint shader, GLsizei bufSize,
1549 GLsizei *length, GLchar *infoLog)
1550 {
1551 GET_CURRENT_CONTEXT(ctx);
1552 get_shader_info_log(ctx, shader, bufSize, length, infoLog);
1553 }
1554
1555
1556 void GLAPIENTRY
1557 _mesa_GetShaderSource(GLuint shader, GLsizei maxLength,
1558 GLsizei *length, GLchar *sourceOut)
1559 {
1560 GET_CURRENT_CONTEXT(ctx);
1561 get_shader_source(ctx, shader, maxLength, length, sourceOut);
1562 }
1563
1564
1565 GLhandleARB GLAPIENTRY
1566 _mesa_GetHandleARB(GLenum pname)
1567 {
1568 GET_CURRENT_CONTEXT(ctx);
1569 return get_handle(ctx, pname);
1570 }
1571
1572
1573 GLboolean GLAPIENTRY
1574 _mesa_IsProgram(GLuint name)
1575 {
1576 GET_CURRENT_CONTEXT(ctx);
1577 return is_program(ctx, name);
1578 }
1579
1580
1581 GLboolean GLAPIENTRY
1582 _mesa_IsShader(GLuint name)
1583 {
1584 GET_CURRENT_CONTEXT(ctx);
1585 return is_shader(ctx, name);
1586 }
1587
1588
1589 void GLAPIENTRY
1590 _mesa_LinkProgram(GLuint programObj)
1591 {
1592 GET_CURRENT_CONTEXT(ctx);
1593 if (MESA_VERBOSE & VERBOSE_API)
1594 _mesa_debug(ctx, "glLinkProgram %u\n", programObj);
1595 _mesa_link_program(ctx, _mesa_lookup_shader_program_err(ctx, programObj,
1596 "glLinkProgram"));
1597 }
1598
1599 #if defined(HAVE_SHA1)
1600 /**
1601 * Generate a SHA-1 hash value string for given source string.
1602 */
1603 static void
1604 generate_sha1(const char *source, char sha_str[64])
1605 {
1606 unsigned char sha[20];
1607 _mesa_sha1_compute(source, strlen(source), sha);
1608 _mesa_sha1_format(sha_str, sha);
1609 }
1610
1611 /**
1612 * Construct a full path for shader replacement functionality using
1613 * following format:
1614 *
1615 * <path>/<stage prefix>_<CHECKSUM>.glsl
1616 */
1617 static char *
1618 construct_name(const gl_shader_stage stage, const char *source,
1619 const char *path)
1620 {
1621 char sha[64];
1622 static const char *types[] = {
1623 "VS", "TC", "TE", "GS", "FS", "CS",
1624 };
1625
1626 generate_sha1(source, sha);
1627 return ralloc_asprintf(NULL, "%s/%s_%s.glsl", path, types[stage], sha);
1628 }
1629
1630 /**
1631 * Write given shader source to a file in MESA_SHADER_DUMP_PATH.
1632 */
1633 static void
1634 dump_shader(const gl_shader_stage stage, const char *source)
1635 {
1636 static bool path_exists = true;
1637 char *dump_path;
1638 FILE *f;
1639
1640 if (!path_exists)
1641 return;
1642
1643 dump_path = getenv("MESA_SHADER_DUMP_PATH");
1644 if (!dump_path) {
1645 path_exists = false;
1646 return;
1647 }
1648
1649 char *name = construct_name(stage, source, dump_path);
1650
1651 f = fopen(name, "w");
1652 if (f) {
1653 fputs(source, f);
1654 fclose(f);
1655 } else {
1656 GET_CURRENT_CONTEXT(ctx);
1657 _mesa_warning(ctx, "could not open %s for dumping shader (%s)", name,
1658 strerror(errno));
1659 }
1660 ralloc_free(name);
1661 }
1662
1663 /**
1664 * Read shader source code from a file.
1665 * Useful for debugging to override an app's shader.
1666 */
1667 static GLcharARB *
1668 read_shader(const gl_shader_stage stage, const char *source)
1669 {
1670 char *read_path;
1671 static bool path_exists = true;
1672 int len, shader_size = 0;
1673 GLcharARB *buffer;
1674 FILE *f;
1675
1676 if (!path_exists)
1677 return NULL;
1678
1679 read_path = getenv("MESA_SHADER_READ_PATH");
1680 if (!read_path) {
1681 path_exists = false;
1682 return NULL;
1683 }
1684
1685 char *name = construct_name(stage, source, read_path);
1686 f = fopen(name, "r");
1687 ralloc_free(name);
1688 if (!f)
1689 return NULL;
1690
1691 /* allocate enough room for the entire shader */
1692 fseek(f, 0, SEEK_END);
1693 shader_size = ftell(f);
1694 rewind(f);
1695 assert(shader_size);
1696
1697 /* add one for terminating zero */
1698 shader_size++;
1699
1700 buffer = malloc(shader_size);
1701 assert(buffer);
1702
1703 len = fread(buffer, 1, shader_size, f);
1704 buffer[len] = 0;
1705
1706 fclose(f);
1707
1708 return buffer;
1709 }
1710 #endif /* HAVE_SHA1 */
1711
1712 /**
1713 * Called via glShaderSource() and glShaderSourceARB() API functions.
1714 * Basically, concatenate the source code strings into one long string
1715 * and pass it to _mesa_shader_source().
1716 */
1717 void GLAPIENTRY
1718 _mesa_ShaderSource(GLuint shaderObj, GLsizei count,
1719 const GLchar * const * string, const GLint * length)
1720 {
1721 GET_CURRENT_CONTEXT(ctx);
1722 GLint *offsets;
1723 GLsizei i, totalLength;
1724 GLcharARB *source;
1725 struct gl_shader *sh;
1726
1727 #if defined(HAVE_SHA1)
1728 GLcharARB *replacement;
1729 #endif /* HAVE_SHA1 */
1730
1731 sh = _mesa_lookup_shader_err(ctx, shaderObj, "glShaderSourceARB");
1732 if (!sh)
1733 return;
1734
1735 if (string == NULL) {
1736 _mesa_error(ctx, GL_INVALID_VALUE, "glShaderSourceARB");
1737 return;
1738 }
1739
1740 /*
1741 * This array holds offsets of where the appropriate string ends, thus the
1742 * last element will be set to the total length of the source code.
1743 */
1744 offsets = malloc(count * sizeof(GLint));
1745 if (offsets == NULL) {
1746 _mesa_error(ctx, GL_OUT_OF_MEMORY, "glShaderSourceARB");
1747 return;
1748 }
1749
1750 for (i = 0; i < count; i++) {
1751 if (string[i] == NULL) {
1752 free((GLvoid *) offsets);
1753 _mesa_error(ctx, GL_INVALID_OPERATION,
1754 "glShaderSourceARB(null string)");
1755 return;
1756 }
1757 if (length == NULL || length[i] < 0)
1758 offsets[i] = strlen(string[i]);
1759 else
1760 offsets[i] = length[i];
1761 /* accumulate string lengths */
1762 if (i > 0)
1763 offsets[i] += offsets[i - 1];
1764 }
1765
1766 /* Total length of source string is sum off all strings plus two.
1767 * One extra byte for terminating zero, another extra byte to silence
1768 * valgrind warnings in the parser/grammer code.
1769 */
1770 totalLength = offsets[count - 1] + 2;
1771 source = malloc(totalLength * sizeof(GLcharARB));
1772 if (source == NULL) {
1773 free((GLvoid *) offsets);
1774 _mesa_error(ctx, GL_OUT_OF_MEMORY, "glShaderSourceARB");
1775 return;
1776 }
1777
1778 for (i = 0; i < count; i++) {
1779 GLint start = (i > 0) ? offsets[i - 1] : 0;
1780 memcpy(source + start, string[i],
1781 (offsets[i] - start) * sizeof(GLcharARB));
1782 }
1783 source[totalLength - 1] = '\0';
1784 source[totalLength - 2] = '\0';
1785
1786 #if defined(HAVE_SHA1)
1787 /* Dump original shader source to MESA_SHADER_DUMP_PATH and replace
1788 * if corresponding entry found from MESA_SHADER_READ_PATH.
1789 */
1790 dump_shader(sh->Stage, source);
1791
1792 replacement = read_shader(sh->Stage, source);
1793 if (replacement) {
1794 free(source);
1795 source = replacement;
1796 }
1797 #endif /* HAVE_SHA1 */
1798
1799 shader_source(sh, source);
1800
1801 free(offsets);
1802 }
1803
1804
1805 void GLAPIENTRY
1806 _mesa_UseProgram(GLuint program)
1807 {
1808 GET_CURRENT_CONTEXT(ctx);
1809 struct gl_shader_program *shProg;
1810
1811 if (MESA_VERBOSE & VERBOSE_API)
1812 _mesa_debug(ctx, "glUseProgram %u\n", program);
1813
1814 if (_mesa_is_xfb_active_and_unpaused(ctx)) {
1815 _mesa_error(ctx, GL_INVALID_OPERATION,
1816 "glUseProgram(transform feedback active)");
1817 return;
1818 }
1819
1820 if (program) {
1821 shProg = _mesa_lookup_shader_program_err(ctx, program, "glUseProgram");
1822 if (!shProg) {
1823 return;
1824 }
1825 if (!shProg->data->LinkStatus) {
1826 _mesa_error(ctx, GL_INVALID_OPERATION,
1827 "glUseProgram(program %u not linked)", program);
1828 return;
1829 }
1830
1831 /* debug code */
1832 if (ctx->_Shader->Flags & GLSL_USE_PROG) {
1833 print_shader_info(shProg);
1834 }
1835 }
1836 else {
1837 shProg = NULL;
1838 }
1839
1840 /* The ARB_separate_shader_object spec says:
1841 *
1842 * "The executable code for an individual shader stage is taken from
1843 * the current program for that stage. If there is a current program
1844 * object established by UseProgram, that program is considered current
1845 * for all stages. Otherwise, if there is a bound program pipeline
1846 * object (section 2.14.PPO), the program bound to the appropriate
1847 * stage of the pipeline object is considered current."
1848 */
1849 if (program) {
1850 /* Attach shader state to the binding point */
1851 _mesa_reference_pipeline_object(ctx, &ctx->_Shader, &ctx->Shader);
1852 /* Update the program */
1853 _mesa_use_program(ctx, shProg);
1854 } else {
1855 /* Must be done first: detach the progam */
1856 _mesa_use_program(ctx, shProg);
1857 /* Unattach shader_state binding point */
1858 _mesa_reference_pipeline_object(ctx, &ctx->_Shader, ctx->Pipeline.Default);
1859 /* If a pipeline was bound, rebind it */
1860 if (ctx->Pipeline.Current) {
1861 _mesa_BindProgramPipeline(ctx->Pipeline.Current->Name);
1862 }
1863 }
1864 }
1865
1866
1867 void GLAPIENTRY
1868 _mesa_ValidateProgram(GLuint program)
1869 {
1870 GET_CURRENT_CONTEXT(ctx);
1871 validate_program(ctx, program);
1872 }
1873
1874
1875 /**
1876 * For OpenGL ES 2.0, GL_ARB_ES2_compatibility
1877 */
1878 void GLAPIENTRY
1879 _mesa_GetShaderPrecisionFormat(GLenum shadertype, GLenum precisiontype,
1880 GLint* range, GLint* precision)
1881 {
1882 const struct gl_program_constants *limits;
1883 const struct gl_precision *p;
1884 GET_CURRENT_CONTEXT(ctx);
1885
1886 switch (shadertype) {
1887 case GL_VERTEX_SHADER:
1888 limits = &ctx->Const.Program[MESA_SHADER_VERTEX];
1889 break;
1890 case GL_FRAGMENT_SHADER:
1891 limits = &ctx->Const.Program[MESA_SHADER_FRAGMENT];
1892 break;
1893 default:
1894 _mesa_error(ctx, GL_INVALID_ENUM,
1895 "glGetShaderPrecisionFormat(shadertype)");
1896 return;
1897 }
1898
1899 switch (precisiontype) {
1900 case GL_LOW_FLOAT:
1901 p = &limits->LowFloat;
1902 break;
1903 case GL_MEDIUM_FLOAT:
1904 p = &limits->MediumFloat;
1905 break;
1906 case GL_HIGH_FLOAT:
1907 p = &limits->HighFloat;
1908 break;
1909 case GL_LOW_INT:
1910 p = &limits->LowInt;
1911 break;
1912 case GL_MEDIUM_INT:
1913 p = &limits->MediumInt;
1914 break;
1915 case GL_HIGH_INT:
1916 p = &limits->HighInt;
1917 break;
1918 default:
1919 _mesa_error(ctx, GL_INVALID_ENUM,
1920 "glGetShaderPrecisionFormat(precisiontype)");
1921 return;
1922 }
1923
1924 range[0] = p->RangeMin;
1925 range[1] = p->RangeMax;
1926 precision[0] = p->Precision;
1927 }
1928
1929
1930 /**
1931 * For OpenGL ES 2.0, GL_ARB_ES2_compatibility
1932 */
1933 void GLAPIENTRY
1934 _mesa_ReleaseShaderCompiler(void)
1935 {
1936 _mesa_destroy_shader_compiler_caches();
1937 }
1938
1939
1940 /**
1941 * For OpenGL ES 2.0, GL_ARB_ES2_compatibility
1942 */
1943 void GLAPIENTRY
1944 _mesa_ShaderBinary(GLint n, const GLuint* shaders, GLenum binaryformat,
1945 const void* binary, GLint length)
1946 {
1947 GET_CURRENT_CONTEXT(ctx);
1948 (void) shaders;
1949 (void) binaryformat;
1950 (void) binary;
1951
1952 /* Page 68, section 7.2 'Shader Binaries" of the of the OpenGL ES 3.1, and
1953 * page 88 of the OpenGL 4.5 specs state:
1954 *
1955 * "An INVALID_VALUE error is generated if count or length is negative.
1956 * An INVALID_ENUM error is generated if binaryformat is not a supported
1957 * format returned in SHADER_BINARY_FORMATS."
1958 */
1959 if (n < 0 || length < 0) {
1960 _mesa_error(ctx, GL_INVALID_VALUE, "glShaderBinary(count or length < 0)");
1961 return;
1962 }
1963
1964 _mesa_error(ctx, GL_INVALID_ENUM, "glShaderBinary(format)");
1965 }
1966
1967
1968 void GLAPIENTRY
1969 _mesa_GetProgramBinary(GLuint program, GLsizei bufSize, GLsizei *length,
1970 GLenum *binaryFormat, GLvoid *binary)
1971 {
1972 struct gl_shader_program *shProg;
1973 GLsizei length_dummy;
1974 GET_CURRENT_CONTEXT(ctx);
1975
1976 if (bufSize < 0){
1977 _mesa_error(ctx, GL_INVALID_VALUE, "glGetProgramBinary(bufSize < 0)");
1978 return;
1979 }
1980
1981 shProg = _mesa_lookup_shader_program_err(ctx, program, "glGetProgramBinary");
1982 if (!shProg)
1983 return;
1984
1985 /* The ARB_get_program_binary spec says:
1986 *
1987 * "If <length> is NULL, then no length is returned."
1988 *
1989 * Ensure that length always points to valid storage to avoid multiple NULL
1990 * pointer checks below.
1991 */
1992 if (length == NULL)
1993 length = &length_dummy;
1994
1995
1996 /* The ARB_get_program_binary spec says:
1997 *
1998 * "When a program object's LINK_STATUS is FALSE, its program binary
1999 * length is zero, and a call to GetProgramBinary will generate an
2000 * INVALID_OPERATION error.
2001 */
2002 if (!shProg->data->LinkStatus) {
2003 _mesa_error(ctx, GL_INVALID_OPERATION,
2004 "glGetProgramBinary(program %u not linked)",
2005 shProg->Name);
2006 *length = 0;
2007 return;
2008 }
2009
2010 *length = 0;
2011 _mesa_error(ctx, GL_INVALID_OPERATION,
2012 "glGetProgramBinary(driver supports zero binary formats)");
2013
2014 (void) binaryFormat;
2015 (void) binary;
2016 }
2017
2018 void GLAPIENTRY
2019 _mesa_ProgramBinary(GLuint program, GLenum binaryFormat,
2020 const GLvoid *binary, GLsizei length)
2021 {
2022 struct gl_shader_program *shProg;
2023 GET_CURRENT_CONTEXT(ctx);
2024
2025 shProg = _mesa_lookup_shader_program_err(ctx, program, "glProgramBinary");
2026 if (!shProg)
2027 return;
2028
2029 (void) binaryFormat;
2030 (void) binary;
2031
2032 /* Section 2.3.1 (Errors) of the OpenGL 4.5 spec says:
2033 *
2034 * "If a negative number is provided where an argument of type sizei or
2035 * sizeiptr is specified, an INVALID_VALUE error is generated."
2036 */
2037 if (length < 0) {
2038 _mesa_error(ctx, GL_INVALID_VALUE, "glProgramBinary(length < 0)");
2039 return;
2040 }
2041
2042 /* The ARB_get_program_binary spec says:
2043 *
2044 * "<binaryFormat> and <binary> must be those returned by a previous
2045 * call to GetProgramBinary, and <length> must be the length of the
2046 * program binary as returned by GetProgramBinary or GetProgramiv with
2047 * <pname> PROGRAM_BINARY_LENGTH. Loading the program binary will fail,
2048 * setting the LINK_STATUS of <program> to FALSE, if these conditions
2049 * are not met."
2050 *
2051 * Since any value of binaryFormat passed "is not one of those specified as
2052 * allowable for [this] command, an INVALID_ENUM error is generated."
2053 */
2054 shProg->data->LinkStatus = GL_FALSE;
2055 _mesa_error(ctx, GL_INVALID_ENUM, "glProgramBinary");
2056 }
2057
2058
2059 void GLAPIENTRY
2060 _mesa_ProgramParameteri(GLuint program, GLenum pname, GLint value)
2061 {
2062 struct gl_shader_program *shProg;
2063 GET_CURRENT_CONTEXT(ctx);
2064
2065 shProg = _mesa_lookup_shader_program_err(ctx, program,
2066 "glProgramParameteri");
2067 if (!shProg)
2068 return;
2069
2070 switch (pname) {
2071 case GL_PROGRAM_BINARY_RETRIEVABLE_HINT:
2072 /* This enum isn't part of the OES extension for OpenGL ES 2.0, but it
2073 * is part of OpenGL ES 3.0. For the ES2 case, this function shouldn't
2074 * even be in the dispatch table, so we shouldn't need to expclicitly
2075 * check here.
2076 *
2077 * On desktop, we ignore the 3.0+ requirement because it is silly.
2078 */
2079
2080 /* The ARB_get_program_binary extension spec says:
2081 *
2082 * "An INVALID_VALUE error is generated if the <value> argument to
2083 * ProgramParameteri is not TRUE or FALSE."
2084 */
2085 if (value != GL_TRUE && value != GL_FALSE) {
2086 goto invalid_value;
2087 }
2088
2089 /* No need to notify the driver. Any changes will actually take effect
2090 * the next time the shader is linked.
2091 *
2092 * The ARB_get_program_binary extension spec says:
2093 *
2094 * "To indicate that a program binary is likely to be retrieved,
2095 * ProgramParameteri should be called with <pname>
2096 * PROGRAM_BINARY_RETRIEVABLE_HINT and <value> TRUE. This setting
2097 * will not be in effect until the next time LinkProgram or
2098 * ProgramBinary has been called successfully."
2099 *
2100 * The resloution of issue 9 in the extension spec also says:
2101 *
2102 * "The application may use the PROGRAM_BINARY_RETRIEVABLE_HINT hint
2103 * to indicate to the GL implementation that this program will
2104 * likely be saved with GetProgramBinary at some point. This will
2105 * give the GL implementation the opportunity to track any state
2106 * changes made to the program before being saved such that when it
2107 * is loaded again a recompile can be avoided."
2108 */
2109 shProg->BinaryRetreivableHint = value;
2110 return;
2111
2112 case GL_PROGRAM_SEPARABLE:
2113 /* Spec imply that the behavior is the same as ARB_get_program_binary
2114 * Chapter 7.3 Program Objects
2115 */
2116 if (value != GL_TRUE && value != GL_FALSE) {
2117 goto invalid_value;
2118 }
2119 shProg->SeparateShader = value;
2120 return;
2121
2122 default:
2123 _mesa_error(ctx, GL_INVALID_ENUM, "glProgramParameteri(pname=%s)",
2124 _mesa_enum_to_string(pname));
2125 return;
2126 }
2127
2128 invalid_value:
2129 _mesa_error(ctx, GL_INVALID_VALUE,
2130 "glProgramParameteri(pname=%s, value=%d): "
2131 "value must be 0 or 1.",
2132 _mesa_enum_to_string(pname),
2133 value);
2134 }
2135
2136
2137 void
2138 _mesa_use_shader_program(struct gl_context *ctx, GLenum type,
2139 struct gl_shader_program *shProg,
2140 struct gl_pipeline_object *shTarget)
2141 {
2142 gl_shader_stage stage = _mesa_shader_enum_to_shader_stage(type);
2143 use_shader_program(ctx, stage, shProg, shTarget);
2144 }
2145
2146
2147 /**
2148 * Copy program-specific data generated by linking from the gl_shader_program
2149 * object to the gl_program object referred to by the gl_linked_shader.
2150 *
2151 * This function expects _mesa_reference_program() to have been previously
2152 * called setting the gl_linked_shaders program reference.
2153 */
2154 void
2155 _mesa_copy_linked_program_data(const struct gl_shader_program *src,
2156 struct gl_linked_shader *dst_sh)
2157 {
2158 assert(dst_sh->Program);
2159
2160 struct gl_program *dst = dst_sh->Program;
2161
2162 dst->info.num_images = dst_sh->NumImages;
2163 dst->info.separate_shader = src->SeparateShader;
2164
2165 switch (dst_sh->Stage) {
2166 case MESA_SHADER_VERTEX:
2167 dst->ClipDistanceArraySize = src->Vert.ClipDistanceArraySize;
2168 dst->CullDistanceArraySize = src->Vert.CullDistanceArraySize;
2169 break;
2170 case MESA_SHADER_TESS_CTRL: {
2171 dst->info.tcs.vertices_out = dst_sh->info.TessCtrl.VerticesOut;
2172 break;
2173 }
2174 case MESA_SHADER_TESS_EVAL: {
2175 dst->info.tes.primitive_mode = dst_sh->info.TessEval.PrimitiveMode;
2176 dst->info.tes.spacing = dst_sh->info.TessEval.Spacing;
2177 dst->info.tes.vertex_order = dst_sh->info.TessEval.VertexOrder;
2178 dst->info.tes.point_mode = dst_sh->info.TessEval.PointMode;
2179 dst->ClipDistanceArraySize = src->TessEval.ClipDistanceArraySize;
2180 dst->CullDistanceArraySize = src->TessEval.CullDistanceArraySize;
2181 break;
2182 }
2183 case MESA_SHADER_GEOMETRY: {
2184 dst->info.gs.vertices_in = src->Geom.VerticesIn;
2185 dst->info.gs.vertices_out = dst_sh->info.Geom.VerticesOut;
2186 dst->info.gs.invocations = dst_sh->info.Geom.Invocations;
2187 dst->info.gs.input_primitive = dst_sh->info.Geom.InputType;
2188 dst->info.gs.output_primitive = dst_sh->info.Geom.OutputType;
2189 dst->ClipDistanceArraySize = src->Geom.ClipDistanceArraySize;
2190 dst->CullDistanceArraySize = src->Geom.CullDistanceArraySize;
2191 dst->info.gs.uses_end_primitive = src->Geom.UsesEndPrimitive;
2192 dst->info.gs.uses_streams = src->Geom.UsesStreams;
2193 break;
2194 }
2195 case MESA_SHADER_FRAGMENT: {
2196 dst->info.fs.depth_layout = src->FragDepthLayout;
2197 dst->info.fs.early_fragment_tests = dst_sh->info.EarlyFragmentTests;
2198 dst->info.fs.inner_coverage = dst_sh->info.InnerCoverage;
2199 dst->info.fs.post_depth_coverage = dst_sh->info.PostDepthCoverage;
2200 break;
2201 }
2202 case MESA_SHADER_COMPUTE: {
2203 for (int i = 0; i < 3; i++)
2204 dst->info.cs.local_size[i] = src->Comp.LocalSize[i];
2205 dst->info.cs.shared_size = src->Comp.SharedSize;
2206 dst->info.cs.local_size_variable = src->Comp.LocalSizeVariable;
2207 break;
2208 }
2209 default:
2210 break;
2211 }
2212 }
2213
2214 /**
2215 * ARB_separate_shader_objects: Compile & Link Program
2216 */
2217 GLuint GLAPIENTRY
2218 _mesa_CreateShaderProgramv(GLenum type, GLsizei count,
2219 const GLchar* const *strings)
2220 {
2221 GET_CURRENT_CONTEXT(ctx);
2222
2223 const GLuint shader = create_shader(ctx, type);
2224 GLuint program = 0;
2225
2226 /*
2227 * According to OpenGL 4.5 and OpenGL ES 3.1 standards, section 7.3:
2228 * GL_INVALID_VALUE should be generated if count < 0
2229 */
2230 if (count < 0) {
2231 _mesa_error(ctx, GL_INVALID_VALUE, "glCreateShaderProgram (count < 0)");
2232 return program;
2233 }
2234
2235 if (shader) {
2236 struct gl_shader *sh = _mesa_lookup_shader(ctx, shader);
2237
2238 _mesa_ShaderSource(shader, count, strings, NULL);
2239 _mesa_compile_shader(ctx, sh);
2240
2241 program = create_shader_program(ctx);
2242 if (program) {
2243 struct gl_shader_program *shProg;
2244 GLint compiled = GL_FALSE;
2245
2246 shProg = _mesa_lookup_shader_program(ctx, program);
2247
2248 shProg->SeparateShader = GL_TRUE;
2249
2250 get_shaderiv(ctx, shader, GL_COMPILE_STATUS, &compiled);
2251 if (compiled) {
2252 attach_shader(ctx, program, shader);
2253 _mesa_link_program(ctx, shProg);
2254 detach_shader(ctx, program, shader);
2255
2256 #if 0
2257 /* Possibly... */
2258 if (active-user-defined-varyings-in-linked-program) {
2259 append-error-to-info-log;
2260 shProg->data->LinkStatus = GL_FALSE;
2261 }
2262 #endif
2263 }
2264 if (sh->InfoLog)
2265 ralloc_strcat(&shProg->data->InfoLog, sh->InfoLog);
2266 }
2267
2268 delete_shader(ctx, shader);
2269 }
2270
2271 return program;
2272 }
2273
2274
2275 /**
2276 * For GL_ARB_tessellation_shader
2277 */
2278 extern void GLAPIENTRY
2279 _mesa_PatchParameteri(GLenum pname, GLint value)
2280 {
2281 GET_CURRENT_CONTEXT(ctx);
2282
2283 if (!_mesa_has_tessellation(ctx)) {
2284 _mesa_error(ctx, GL_INVALID_OPERATION, "glPatchParameteri");
2285 return;
2286 }
2287
2288 if (pname != GL_PATCH_VERTICES) {
2289 _mesa_error(ctx, GL_INVALID_ENUM, "glPatchParameteri");
2290 return;
2291 }
2292
2293 if (value <= 0 || value > ctx->Const.MaxPatchVertices) {
2294 _mesa_error(ctx, GL_INVALID_VALUE, "glPatchParameteri");
2295 return;
2296 }
2297
2298 ctx->TessCtrlProgram.patch_vertices = value;
2299 }
2300
2301
2302 extern void GLAPIENTRY
2303 _mesa_PatchParameterfv(GLenum pname, const GLfloat *values)
2304 {
2305 GET_CURRENT_CONTEXT(ctx);
2306
2307 if (!_mesa_has_tessellation(ctx)) {
2308 _mesa_error(ctx, GL_INVALID_OPERATION, "glPatchParameterfv");
2309 return;
2310 }
2311
2312 switch(pname) {
2313 case GL_PATCH_DEFAULT_OUTER_LEVEL:
2314 FLUSH_VERTICES(ctx, 0);
2315 memcpy(ctx->TessCtrlProgram.patch_default_outer_level, values,
2316 4 * sizeof(GLfloat));
2317 ctx->NewDriverState |= ctx->DriverFlags.NewDefaultTessLevels;
2318 return;
2319 case GL_PATCH_DEFAULT_INNER_LEVEL:
2320 FLUSH_VERTICES(ctx, 0);
2321 memcpy(ctx->TessCtrlProgram.patch_default_inner_level, values,
2322 2 * sizeof(GLfloat));
2323 ctx->NewDriverState |= ctx->DriverFlags.NewDefaultTessLevels;
2324 return;
2325 default:
2326 _mesa_error(ctx, GL_INVALID_ENUM, "glPatchParameterfv");
2327 return;
2328 }
2329 }
2330
2331 /**
2332 * ARB_shader_subroutine
2333 */
2334 GLint GLAPIENTRY
2335 _mesa_GetSubroutineUniformLocation(GLuint program, GLenum shadertype,
2336 const GLchar *name)
2337 {
2338 GET_CURRENT_CONTEXT(ctx);
2339 const char *api_name = "glGetSubroutineUniformLocation";
2340 struct gl_shader_program *shProg;
2341 GLenum resource_type;
2342 gl_shader_stage stage;
2343
2344 if (!_mesa_has_ARB_shader_subroutine(ctx)) {
2345 _mesa_error(ctx, GL_INVALID_OPERATION, "%s", api_name);
2346 return -1;
2347 }
2348
2349 if (!_mesa_validate_shader_target(ctx, shadertype)) {
2350 _mesa_error(ctx, GL_INVALID_OPERATION, "%s", api_name);
2351 return -1;
2352 }
2353
2354 shProg = _mesa_lookup_shader_program_err(ctx, program, api_name);
2355 if (!shProg)
2356 return -1;
2357
2358 stage = _mesa_shader_enum_to_shader_stage(shadertype);
2359 if (!shProg->_LinkedShaders[stage]) {
2360 _mesa_error(ctx, GL_INVALID_OPERATION, "%s", api_name);
2361 return -1;
2362 }
2363
2364 resource_type = _mesa_shader_stage_to_subroutine_uniform(stage);
2365 return _mesa_program_resource_location(shProg, resource_type, name);
2366 }
2367
2368 GLuint GLAPIENTRY
2369 _mesa_GetSubroutineIndex(GLuint program, GLenum shadertype,
2370 const GLchar *name)
2371 {
2372 GET_CURRENT_CONTEXT(ctx);
2373 const char *api_name = "glGetSubroutineIndex";
2374 struct gl_shader_program *shProg;
2375 struct gl_program_resource *res;
2376 GLenum resource_type;
2377 gl_shader_stage stage;
2378
2379 if (!_mesa_has_ARB_shader_subroutine(ctx)) {
2380 _mesa_error(ctx, GL_INVALID_OPERATION, "%s", api_name);
2381 return -1;
2382 }
2383
2384 if (!_mesa_validate_shader_target(ctx, shadertype)) {
2385 _mesa_error(ctx, GL_INVALID_OPERATION, "%s", api_name);
2386 return -1;
2387 }
2388
2389 shProg = _mesa_lookup_shader_program_err(ctx, program, api_name);
2390 if (!shProg)
2391 return -1;
2392
2393 stage = _mesa_shader_enum_to_shader_stage(shadertype);
2394 if (!shProg->_LinkedShaders[stage]) {
2395 _mesa_error(ctx, GL_INVALID_OPERATION, "%s", api_name);
2396 return -1;
2397 }
2398
2399 resource_type = _mesa_shader_stage_to_subroutine(stage);
2400 res = _mesa_program_resource_find_name(shProg, resource_type, name, NULL);
2401 if (!res) {
2402 return -1;
2403 }
2404
2405 return _mesa_program_resource_index(shProg, res);
2406 }
2407
2408
2409 GLvoid GLAPIENTRY
2410 _mesa_GetActiveSubroutineUniformiv(GLuint program, GLenum shadertype,
2411 GLuint index, GLenum pname, GLint *values)
2412 {
2413 GET_CURRENT_CONTEXT(ctx);
2414 const char *api_name = "glGetActiveSubroutineUniformiv";
2415 struct gl_shader_program *shProg;
2416 struct gl_linked_shader *sh;
2417 gl_shader_stage stage;
2418 struct gl_program_resource *res;
2419 const struct gl_uniform_storage *uni;
2420 GLenum resource_type;
2421 int count, i, j;
2422
2423 if (!_mesa_has_ARB_shader_subroutine(ctx)) {
2424 _mesa_error(ctx, GL_INVALID_OPERATION, "%s", api_name);
2425 return;
2426 }
2427
2428 if (!_mesa_validate_shader_target(ctx, shadertype)) {
2429 _mesa_error(ctx, GL_INVALID_OPERATION, "%s", api_name);
2430 return;
2431 }
2432
2433 shProg = _mesa_lookup_shader_program_err(ctx, program, api_name);
2434 if (!shProg)
2435 return;
2436
2437 stage = _mesa_shader_enum_to_shader_stage(shadertype);
2438 resource_type = _mesa_shader_stage_to_subroutine_uniform(stage);
2439
2440 sh = shProg->_LinkedShaders[stage];
2441 if (!sh) {
2442 _mesa_error(ctx, GL_INVALID_OPERATION, "%s", api_name);
2443 return;
2444 }
2445
2446 struct gl_program *p = shProg->_LinkedShaders[stage]->Program;
2447 if (index >= p->sh.NumSubroutineUniforms) {
2448 _mesa_error(ctx, GL_INVALID_VALUE, "%s: invalid index greater than GL_ACTIVE_SUBROUTINE_UNIFORMS", api_name);
2449 return;
2450 }
2451
2452 switch (pname) {
2453 case GL_NUM_COMPATIBLE_SUBROUTINES: {
2454 res = _mesa_program_resource_find_index(shProg, resource_type, index);
2455 if (res) {
2456 uni = res->Data;
2457 values[0] = uni->num_compatible_subroutines;
2458 }
2459 break;
2460 }
2461 case GL_COMPATIBLE_SUBROUTINES: {
2462 res = _mesa_program_resource_find_index(shProg, resource_type, index);
2463 if (res) {
2464 uni = res->Data;
2465 count = 0;
2466 for (i = 0; i < p->sh.NumSubroutineFunctions; i++) {
2467 struct gl_subroutine_function *fn = &p->sh.SubroutineFunctions[i];
2468 for (j = 0; j < fn->num_compat_types; j++) {
2469 if (fn->types[j] == uni->type) {
2470 values[count++] = i;
2471 break;
2472 }
2473 }
2474 }
2475 }
2476 break;
2477 }
2478 case GL_UNIFORM_SIZE:
2479 res = _mesa_program_resource_find_index(shProg, resource_type, index);
2480 if (res) {
2481 uni = res->Data;
2482 values[0] = uni->array_elements ? uni->array_elements : 1;
2483 }
2484 break;
2485 case GL_UNIFORM_NAME_LENGTH:
2486 res = _mesa_program_resource_find_index(shProg, resource_type, index);
2487 if (res) {
2488 values[0] = strlen(_mesa_program_resource_name(res)) + 1
2489 + ((_mesa_program_resource_array_size(res) != 0) ? 3 : 0);
2490 }
2491 break;
2492 default:
2493 _mesa_error(ctx, GL_INVALID_OPERATION, "%s", api_name);
2494 return;
2495 }
2496 }
2497
2498
2499 GLvoid GLAPIENTRY
2500 _mesa_GetActiveSubroutineUniformName(GLuint program, GLenum shadertype,
2501 GLuint index, GLsizei bufsize,
2502 GLsizei *length, GLchar *name)
2503 {
2504 GET_CURRENT_CONTEXT(ctx);
2505 const char *api_name = "glGetActiveSubroutineUniformName";
2506 struct gl_shader_program *shProg;
2507 GLenum resource_type;
2508 gl_shader_stage stage;
2509
2510 if (!_mesa_has_ARB_shader_subroutine(ctx)) {
2511 _mesa_error(ctx, GL_INVALID_OPERATION, "%s", api_name);
2512 return;
2513 }
2514
2515 if (!_mesa_validate_shader_target(ctx, shadertype)) {
2516 _mesa_error(ctx, GL_INVALID_OPERATION, "%s", api_name);
2517 return;
2518 }
2519
2520 shProg = _mesa_lookup_shader_program_err(ctx, program, api_name);
2521 if (!shProg)
2522 return;
2523
2524 stage = _mesa_shader_enum_to_shader_stage(shadertype);
2525 if (!shProg->_LinkedShaders[stage]) {
2526 _mesa_error(ctx, GL_INVALID_OPERATION, "%s", api_name);
2527 return;
2528 }
2529
2530 resource_type = _mesa_shader_stage_to_subroutine_uniform(stage);
2531 /* get program resource name */
2532 _mesa_get_program_resource_name(shProg, resource_type,
2533 index, bufsize,
2534 length, name, api_name);
2535 }
2536
2537
2538 GLvoid GLAPIENTRY
2539 _mesa_GetActiveSubroutineName(GLuint program, GLenum shadertype,
2540 GLuint index, GLsizei bufsize,
2541 GLsizei *length, GLchar *name)
2542 {
2543 GET_CURRENT_CONTEXT(ctx);
2544 const char *api_name = "glGetActiveSubroutineName";
2545 struct gl_shader_program *shProg;
2546 GLenum resource_type;
2547 gl_shader_stage stage;
2548
2549 if (!_mesa_has_ARB_shader_subroutine(ctx)) {
2550 _mesa_error(ctx, GL_INVALID_OPERATION, "%s", api_name);
2551 return;
2552 }
2553
2554 if (!_mesa_validate_shader_target(ctx, shadertype)) {
2555 _mesa_error(ctx, GL_INVALID_OPERATION, "%s", api_name);
2556 return;
2557 }
2558
2559 shProg = _mesa_lookup_shader_program_err(ctx, program, api_name);
2560 if (!shProg)
2561 return;
2562
2563 stage = _mesa_shader_enum_to_shader_stage(shadertype);
2564 if (!shProg->_LinkedShaders[stage]) {
2565 _mesa_error(ctx, GL_INVALID_OPERATION, "%s", api_name);
2566 return;
2567 }
2568 resource_type = _mesa_shader_stage_to_subroutine(stage);
2569 _mesa_get_program_resource_name(shProg, resource_type,
2570 index, bufsize,
2571 length, name, api_name);
2572 }
2573
2574 GLvoid GLAPIENTRY
2575 _mesa_UniformSubroutinesuiv(GLenum shadertype, GLsizei count,
2576 const GLuint *indices)
2577 {
2578 GET_CURRENT_CONTEXT(ctx);
2579 const char *api_name = "glUniformSubroutinesuiv";
2580 struct gl_shader_program *shProg;
2581 struct gl_linked_shader *sh;
2582 gl_shader_stage stage;
2583 int i;
2584
2585 if (!_mesa_has_ARB_shader_subroutine(ctx)) {
2586 _mesa_error(ctx, GL_INVALID_OPERATION, "%s", api_name);
2587 return;
2588 }
2589
2590 if (!_mesa_validate_shader_target(ctx, shadertype)) {
2591 _mesa_error(ctx, GL_INVALID_OPERATION, "%s", api_name);
2592 return;
2593 }
2594
2595 stage = _mesa_shader_enum_to_shader_stage(shadertype);
2596 shProg = ctx->_Shader->CurrentProgram[stage];
2597 if (!shProg) {
2598 _mesa_error(ctx, GL_INVALID_OPERATION, "%s", api_name);
2599 return;
2600 }
2601
2602 sh = shProg->_LinkedShaders[stage];
2603 if (!sh) {
2604 _mesa_error(ctx, GL_INVALID_OPERATION, "%s", api_name);
2605 return;
2606 }
2607
2608 struct gl_program *p = shProg->_LinkedShaders[stage]->Program;
2609 if (count != p->sh.NumSubroutineUniformRemapTable) {
2610 _mesa_error(ctx, GL_INVALID_VALUE, "%s", api_name);
2611 return;
2612 }
2613
2614 i = 0;
2615 do {
2616 struct gl_uniform_storage *uni = p->sh.SubroutineUniformRemapTable[i];
2617 if (uni == NULL) {
2618 i++;
2619 continue;
2620 }
2621
2622 int uni_count = uni->array_elements ? uni->array_elements : 1;
2623 int j, k, f;
2624
2625 for (j = i; j < i + uni_count; j++) {
2626 struct gl_subroutine_function *subfn = NULL;
2627 if (indices[j] > p->sh.MaxSubroutineFunctionIndex) {
2628 _mesa_error(ctx, GL_INVALID_VALUE, "%s", api_name);
2629 return;
2630 }
2631
2632 for (f = 0; f < p->sh.NumSubroutineFunctions; f++) {
2633 if (p->sh.SubroutineFunctions[f].index == indices[j])
2634 subfn = &p->sh.SubroutineFunctions[f];
2635 }
2636
2637 if (!subfn) {
2638 continue;
2639 }
2640
2641 for (k = 0; k < subfn->num_compat_types; k++) {
2642 if (subfn->types[k] == uni->type)
2643 break;
2644 }
2645 if (k == subfn->num_compat_types) {
2646 _mesa_error(ctx, GL_INVALID_OPERATION, "%s", api_name);
2647 return;
2648 }
2649
2650 ctx->SubroutineIndex[p->info.stage].IndexPtr[j] = indices[j];
2651 }
2652 i += uni_count;
2653 } while(i < count);
2654
2655 FLUSH_VERTICES(ctx, _NEW_PROGRAM_CONSTANTS);
2656 }
2657
2658
2659 GLvoid GLAPIENTRY
2660 _mesa_GetUniformSubroutineuiv(GLenum shadertype, GLint location,
2661 GLuint *params)
2662 {
2663 GET_CURRENT_CONTEXT(ctx);
2664 const char *api_name = "glGetUniformSubroutineuiv";
2665 struct gl_shader_program *shProg;
2666 struct gl_linked_shader *sh;
2667 gl_shader_stage stage;
2668
2669 if (!_mesa_has_ARB_shader_subroutine(ctx)) {
2670 _mesa_error(ctx, GL_INVALID_OPERATION, "%s", api_name);
2671 return;
2672 }
2673
2674 if (!_mesa_validate_shader_target(ctx, shadertype)) {
2675 _mesa_error(ctx, GL_INVALID_OPERATION, "%s", api_name);
2676 return;
2677 }
2678
2679 stage = _mesa_shader_enum_to_shader_stage(shadertype);
2680 shProg = ctx->_Shader->CurrentProgram[stage];
2681 if (!shProg) {
2682 _mesa_error(ctx, GL_INVALID_OPERATION, "%s", api_name);
2683 return;
2684 }
2685
2686 sh = shProg->_LinkedShaders[stage];
2687 if (!sh) {
2688 _mesa_error(ctx, GL_INVALID_OPERATION, "%s", api_name);
2689 return;
2690 }
2691
2692 struct gl_program *p = sh->Program;
2693 if (location >= p->sh.NumSubroutineUniformRemapTable) {
2694 _mesa_error(ctx, GL_INVALID_VALUE, "%s", api_name);
2695 return;
2696 }
2697
2698 *params = ctx->SubroutineIndex[p->info.stage].IndexPtr[location];
2699 }
2700
2701
2702 GLvoid GLAPIENTRY
2703 _mesa_GetProgramStageiv(GLuint program, GLenum shadertype,
2704 GLenum pname, GLint *values)
2705 {
2706 GET_CURRENT_CONTEXT(ctx);
2707 const char *api_name = "glGetProgramStageiv";
2708 struct gl_shader_program *shProg;
2709 struct gl_linked_shader *sh;
2710 gl_shader_stage stage;
2711
2712 if (!_mesa_has_ARB_shader_subroutine(ctx)) {
2713 _mesa_error(ctx, GL_INVALID_OPERATION, "%s", api_name);
2714 return;
2715 }
2716
2717 if (!_mesa_validate_shader_target(ctx, shadertype)) {
2718 _mesa_error(ctx, GL_INVALID_OPERATION, "%s", api_name);
2719 return;
2720 }
2721
2722 shProg = _mesa_lookup_shader_program_err(ctx, program, api_name);
2723 if (!shProg)
2724 return;
2725
2726 stage = _mesa_shader_enum_to_shader_stage(shadertype);
2727 sh = shProg->_LinkedShaders[stage];
2728
2729 /* ARB_shader_subroutine doesn't ask the program to be linked, or list any
2730 * INVALID_OPERATION in the case of not be linked.
2731 *
2732 * And for some pnames, like GL_ACTIVE_SUBROUTINE_UNIFORMS, you can ask the
2733 * same info using other specs (ARB_program_interface_query), without the
2734 * need of the program to be linked, being the value for that case 0.
2735 *
2736 * But at the same time, some other methods require the program to be
2737 * linked for pname related to locations, so it would be inconsistent to
2738 * not do the same here. So we are:
2739 * * Return GL_INVALID_OPERATION if not linked only for locations.
2740 * * Setting a default value of 0, to be returned if not linked.
2741 */
2742 if (!sh) {
2743 values[0] = 0;
2744 if (pname == GL_ACTIVE_SUBROUTINE_UNIFORM_LOCATIONS) {
2745 _mesa_error(ctx, GL_INVALID_OPERATION, "%s", api_name);
2746 }
2747 return;
2748 }
2749
2750 struct gl_program *p = sh->Program;
2751 switch (pname) {
2752 case GL_ACTIVE_SUBROUTINES:
2753 values[0] = p->sh.NumSubroutineFunctions;
2754 break;
2755 case GL_ACTIVE_SUBROUTINE_UNIFORM_LOCATIONS:
2756 values[0] = p->sh.NumSubroutineUniformRemapTable;
2757 break;
2758 case GL_ACTIVE_SUBROUTINE_UNIFORMS:
2759 values[0] = p->sh.NumSubroutineUniforms;
2760 break;
2761 case GL_ACTIVE_SUBROUTINE_MAX_LENGTH:
2762 {
2763 unsigned i;
2764 GLint max_len = 0;
2765 GLenum resource_type;
2766 struct gl_program_resource *res;
2767
2768 resource_type = _mesa_shader_stage_to_subroutine(stage);
2769 for (i = 0; i < p->sh.NumSubroutineFunctions; i++) {
2770 res = _mesa_program_resource_find_index(shProg, resource_type, i);
2771 if (res) {
2772 const GLint len = strlen(_mesa_program_resource_name(res)) + 1;
2773 if (len > max_len)
2774 max_len = len;
2775 }
2776 }
2777 values[0] = max_len;
2778 break;
2779 }
2780 case GL_ACTIVE_SUBROUTINE_UNIFORM_MAX_LENGTH:
2781 {
2782 unsigned i;
2783 GLint max_len = 0;
2784 GLenum resource_type;
2785 struct gl_program_resource *res;
2786
2787 resource_type = _mesa_shader_stage_to_subroutine_uniform(stage);
2788 for (i = 0; i < p->sh.NumSubroutineUniformRemapTable; i++) {
2789 res = _mesa_program_resource_find_index(shProg, resource_type, i);
2790 if (res) {
2791 const GLint len = strlen(_mesa_program_resource_name(res)) + 1
2792 + ((_mesa_program_resource_array_size(res) != 0) ? 3 : 0);
2793
2794 if (len > max_len)
2795 max_len = len;
2796 }
2797 }
2798 values[0] = max_len;
2799 break;
2800 }
2801 default:
2802 _mesa_error(ctx, GL_INVALID_ENUM, "%s", api_name);
2803 values[0] = -1;
2804 break;
2805 }
2806 }
2807
2808 static int
2809 find_compat_subroutine(struct gl_program *p, const struct glsl_type *type)
2810 {
2811 int i, j;
2812
2813 for (i = 0; i < p->sh.NumSubroutineFunctions; i++) {
2814 struct gl_subroutine_function *fn = &p->sh.SubroutineFunctions[i];
2815 for (j = 0; j < fn->num_compat_types; j++) {
2816 if (fn->types[j] == type)
2817 return i;
2818 }
2819 }
2820 return 0;
2821 }
2822
2823 static void
2824 _mesa_shader_write_subroutine_index(struct gl_context *ctx,
2825 struct gl_program *p)
2826 {
2827 int i, j;
2828
2829 if (p->sh.NumSubroutineUniformRemapTable == 0)
2830 return;
2831
2832 i = 0;
2833 do {
2834 struct gl_uniform_storage *uni = p->sh.SubroutineUniformRemapTable[i];
2835 int uni_count;
2836 int val;
2837
2838 if (!uni) {
2839 i++;
2840 continue;
2841 }
2842
2843 uni_count = uni->array_elements ? uni->array_elements : 1;
2844 for (j = 0; j < uni_count; j++) {
2845 val = ctx->SubroutineIndex[p->info.stage].IndexPtr[i + j];
2846 memcpy(&uni->storage[j], &val, sizeof(int));
2847 }
2848
2849 _mesa_propagate_uniforms_to_driver_storage(uni, 0, uni_count);
2850 i += uni_count;
2851 } while(i < p->sh.NumSubroutineUniformRemapTable);
2852 }
2853
2854 void
2855 _mesa_shader_write_subroutine_indices(struct gl_context *ctx,
2856 gl_shader_stage stage)
2857 {
2858 if (ctx->_Shader->CurrentProgram[stage] &&
2859 ctx->_Shader->CurrentProgram[stage]->_LinkedShaders[stage])
2860 _mesa_shader_write_subroutine_index(ctx,
2861 ctx->_Shader->CurrentProgram[stage]->_LinkedShaders[stage]->Program);
2862 }
2863
2864 static void
2865 _mesa_program_init_subroutine_defaults(struct gl_context *ctx,
2866 struct gl_program *p)
2867 {
2868 assert(p);
2869
2870 struct gl_subroutine_index_binding *binding = &ctx->SubroutineIndex[p->info.stage];
2871 if (binding->NumIndex != p->sh.NumSubroutineUniformRemapTable) {
2872 binding->IndexPtr = realloc(binding->IndexPtr,
2873 p->sh.NumSubroutineUniformRemapTable * (sizeof(GLuint)));
2874 binding->NumIndex = p->sh.NumSubroutineUniformRemapTable;
2875 }
2876
2877 for (int i = 0; i < p->sh.NumSubroutineUniformRemapTable; i++) {
2878 struct gl_uniform_storage *uni = p->sh.SubroutineUniformRemapTable[i];
2879
2880 if (!uni)
2881 continue;
2882
2883 binding->IndexPtr[i] = find_compat_subroutine(p, uni->type);
2884 }
2885 }
2886
2887 void
2888 _mesa_shader_program_init_subroutine_defaults(struct gl_context *ctx,
2889 struct gl_shader_program *shProg)
2890 {
2891 int i;
2892
2893 if (!shProg)
2894 return;
2895
2896 for (i = 0; i < MESA_SHADER_STAGES; i++) {
2897 if (!shProg->_LinkedShaders[i])
2898 continue;
2899
2900 _mesa_program_init_subroutine_defaults(ctx, shProg->_LinkedShaders[i]->Program);
2901 }
2902 }