2 * Copyright © 2011 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
25 * \file shader_query.cpp
26 * C-to-C++ bridge functions to query GLSL shader data
28 * \author Ian Romanick <ian.d.romanick@intel.com>
31 #include "main/context.h"
32 #include "main/core.h"
33 #include "glsl_symbol_table.h"
35 #include "shaderapi.h"
36 #include "shaderobj.h"
37 #include "program/hash_table.h"
38 #include "../glsl/program.h"
40 #include "main/enums.h"
41 #include "util/strndup.h"
45 program_resource_location(struct gl_shader_program
*shProg
,
46 struct gl_program_resource
*res
, const char *name
,
47 unsigned array_index
);
50 * Declare convenience functions to return resource data in a given type.
51 * Warning! this is not type safe so be *very* careful when using these.
53 #define DECL_RESOURCE_FUNC(name, type) \
54 const type * RESOURCE_ ## name (gl_program_resource *res) { \
56 return (type *) res->Data; \
59 DECL_RESOURCE_FUNC(VAR
, ir_variable
);
60 DECL_RESOURCE_FUNC(UBO
, gl_uniform_block
);
61 DECL_RESOURCE_FUNC(UNI
, gl_uniform_storage
);
62 DECL_RESOURCE_FUNC(ATC
, gl_active_atomic_buffer
);
63 DECL_RESOURCE_FUNC(XFB
, gl_transform_feedback_varying_info
);
64 DECL_RESOURCE_FUNC(SUB
, gl_subroutine_function
);
67 _mesa_BindAttribLocation(GLhandleARB program
, GLuint index
,
68 const GLcharARB
*name
)
70 GET_CURRENT_CONTEXT(ctx
);
72 struct gl_shader_program
*const shProg
=
73 _mesa_lookup_shader_program_err(ctx
, program
, "glBindAttribLocation");
80 if (strncmp(name
, "gl_", 3) == 0) {
81 _mesa_error(ctx
, GL_INVALID_OPERATION
,
82 "glBindAttribLocation(illegal name)");
86 if (index
>= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxAttribs
) {
87 _mesa_error(ctx
, GL_INVALID_VALUE
, "glBindAttribLocation(index)");
91 /* Replace the current value if it's already in the list. Add
92 * VERT_ATTRIB_GENERIC0 because that's how the linker differentiates
93 * between built-in attributes and user-defined attributes.
95 shProg
->AttributeBindings
->put(index
+ VERT_ATTRIB_GENERIC0
, name
);
98 * Note that this attribute binding won't go into effect until
99 * glLinkProgram is called again.
104 is_active_attrib(const ir_variable
*var
)
109 switch (var
->data
.mode
) {
110 case ir_var_shader_in
:
111 return var
->data
.location
!= -1;
113 case ir_var_system_value
:
114 /* From GL 4.3 core spec, section 11.1.1 (Vertex Attributes):
115 * "For GetActiveAttrib, all active vertex shader input variables
116 * are enumerated, including the special built-in inputs gl_VertexID
117 * and gl_InstanceID."
119 return var
->data
.location
== SYSTEM_VALUE_VERTEX_ID
||
120 var
->data
.location
== SYSTEM_VALUE_VERTEX_ID_ZERO_BASE
||
121 var
->data
.location
== SYSTEM_VALUE_INSTANCE_ID
;
129 _mesa_GetActiveAttrib(GLhandleARB program
, GLuint desired_index
,
130 GLsizei maxLength
, GLsizei
* length
, GLint
* size
,
131 GLenum
* type
, GLcharARB
* name
)
133 GET_CURRENT_CONTEXT(ctx
);
134 struct gl_shader_program
*shProg
;
137 _mesa_error(ctx
, GL_INVALID_VALUE
, "glGetActiveAttrib(maxLength < 0)");
141 shProg
= _mesa_lookup_shader_program_err(ctx
, program
, "glGetActiveAttrib");
145 if (!shProg
->LinkStatus
) {
146 _mesa_error(ctx
, GL_INVALID_VALUE
,
147 "glGetActiveAttrib(program not linked)");
151 if (shProg
->_LinkedShaders
[MESA_SHADER_VERTEX
] == NULL
) {
152 _mesa_error(ctx
, GL_INVALID_VALUE
, "glGetActiveAttrib(no vertex shader)");
156 struct gl_program_resource
*res
=
157 _mesa_program_resource_find_index(shProg
, GL_PROGRAM_INPUT
,
160 /* User asked for index that does not exist. */
162 _mesa_error(ctx
, GL_INVALID_VALUE
, "glGetActiveAttrib(index)");
166 const ir_variable
*const var
= RESOURCE_VAR(res
);
168 if (!is_active_attrib(var
))
171 const char *var_name
= var
->name
;
173 /* Since gl_VertexID may be lowered to gl_VertexIDMESA, we need to
174 * consider gl_VertexIDMESA as gl_VertexID for purposes of checking
177 if (var
->data
.mode
== ir_var_system_value
&&
178 var
->data
.location
== SYSTEM_VALUE_VERTEX_ID_ZERO_BASE
) {
179 var_name
= "gl_VertexID";
182 _mesa_copy_string(name
, maxLength
, length
, var_name
);
185 _mesa_program_resource_prop(shProg
, res
, desired_index
, GL_ARRAY_SIZE
,
186 size
, "glGetActiveAttrib");
189 _mesa_program_resource_prop(shProg
, res
, desired_index
, GL_TYPE
,
190 (GLint
*) type
, "glGetActiveAttrib");
194 _mesa_GetAttribLocation(GLhandleARB program
, const GLcharARB
* name
)
196 GET_CURRENT_CONTEXT(ctx
);
197 struct gl_shader_program
*const shProg
=
198 _mesa_lookup_shader_program_err(ctx
, program
, "glGetAttribLocation");
204 if (!shProg
->LinkStatus
) {
205 _mesa_error(ctx
, GL_INVALID_OPERATION
,
206 "glGetAttribLocation(program not linked)");
213 /* Not having a vertex shader is not an error.
215 if (shProg
->_LinkedShaders
[MESA_SHADER_VERTEX
] == NULL
)
218 unsigned array_index
= 0;
219 struct gl_program_resource
*res
=
220 _mesa_program_resource_find_name(shProg
, GL_PROGRAM_INPUT
, name
,
226 GLint loc
= program_resource_location(shProg
, res
, name
, array_index
);
228 /* The extra check against against 0 is made because of builtin-attribute
229 * locations that have offset applied. Function program_resource_location
230 * can return built-in attribute locations < 0 and glGetAttribLocation
231 * cannot be used on "conventional" attributes.
233 * From page 95 of the OpenGL 3.0 spec:
235 * "If name is not an active attribute, if name is a conventional
236 * attribute, or if an error occurs, -1 will be returned."
238 return (loc
>= 0) ? loc
: -1;
242 _mesa_count_active_attribs(struct gl_shader_program
*shProg
)
244 if (!shProg
->LinkStatus
245 || shProg
->_LinkedShaders
[MESA_SHADER_VERTEX
] == NULL
) {
249 struct gl_program_resource
*res
= shProg
->ProgramResourceList
;
251 for (unsigned j
= 0; j
< shProg
->NumProgramResourceList
; j
++, res
++) {
252 if (res
->Type
== GL_PROGRAM_INPUT
&&
253 res
->StageReferences
& (1 << MESA_SHADER_VERTEX
) &&
254 is_active_attrib(RESOURCE_VAR(res
)))
262 _mesa_longest_attribute_name_length(struct gl_shader_program
*shProg
)
264 if (!shProg
->LinkStatus
265 || shProg
->_LinkedShaders
[MESA_SHADER_VERTEX
] == NULL
) {
269 struct gl_program_resource
*res
= shProg
->ProgramResourceList
;
271 for (unsigned j
= 0; j
< shProg
->NumProgramResourceList
; j
++, res
++) {
272 if (res
->Type
== GL_PROGRAM_INPUT
&&
273 res
->StageReferences
& (1 << MESA_SHADER_VERTEX
)) {
275 const size_t length
= strlen(RESOURCE_VAR(res
)->name
);
276 if (length
>= longest
)
277 longest
= length
+ 1;
285 _mesa_BindFragDataLocation(GLuint program
, GLuint colorNumber
,
288 _mesa_BindFragDataLocationIndexed(program
, colorNumber
, 0, name
);
292 _mesa_BindFragDataLocationIndexed(GLuint program
, GLuint colorNumber
,
293 GLuint index
, const GLchar
*name
)
295 GET_CURRENT_CONTEXT(ctx
);
297 struct gl_shader_program
*const shProg
=
298 _mesa_lookup_shader_program_err(ctx
, program
, "glBindFragDataLocationIndexed");
305 if (strncmp(name
, "gl_", 3) == 0) {
306 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glBindFragDataLocationIndexed(illegal name)");
311 _mesa_error(ctx
, GL_INVALID_VALUE
, "glBindFragDataLocationIndexed(index)");
315 if (index
== 0 && colorNumber
>= ctx
->Const
.MaxDrawBuffers
) {
316 _mesa_error(ctx
, GL_INVALID_VALUE
, "glBindFragDataLocationIndexed(colorNumber)");
320 if (index
== 1 && colorNumber
>= ctx
->Const
.MaxDualSourceDrawBuffers
) {
321 _mesa_error(ctx
, GL_INVALID_VALUE
, "glBindFragDataLocationIndexed(colorNumber)");
325 /* Replace the current value if it's already in the list. Add
326 * FRAG_RESULT_DATA0 because that's how the linker differentiates
327 * between built-in attributes and user-defined attributes.
329 shProg
->FragDataBindings
->put(colorNumber
+ FRAG_RESULT_DATA0
, name
);
330 shProg
->FragDataIndexBindings
->put(index
, name
);
332 * Note that this binding won't go into effect until
333 * glLinkProgram is called again.
339 _mesa_GetFragDataIndex(GLuint program
, const GLchar
*name
)
341 GET_CURRENT_CONTEXT(ctx
);
342 struct gl_shader_program
*const shProg
=
343 _mesa_lookup_shader_program_err(ctx
, program
, "glGetFragDataIndex");
349 if (!shProg
->LinkStatus
) {
350 _mesa_error(ctx
, GL_INVALID_OPERATION
,
351 "glGetFragDataIndex(program not linked)");
358 if (strncmp(name
, "gl_", 3) == 0) {
359 _mesa_error(ctx
, GL_INVALID_OPERATION
,
360 "glGetFragDataIndex(illegal name)");
364 /* Not having a fragment shader is not an error.
366 if (shProg
->_LinkedShaders
[MESA_SHADER_FRAGMENT
] == NULL
)
369 return _mesa_program_resource_location_index(shProg
, GL_PROGRAM_OUTPUT
,
374 _mesa_GetFragDataLocation(GLuint program
, const GLchar
*name
)
376 GET_CURRENT_CONTEXT(ctx
);
377 struct gl_shader_program
*const shProg
=
378 _mesa_lookup_shader_program_err(ctx
, program
, "glGetFragDataLocation");
384 if (!shProg
->LinkStatus
) {
385 _mesa_error(ctx
, GL_INVALID_OPERATION
,
386 "glGetFragDataLocation(program not linked)");
393 if (strncmp(name
, "gl_", 3) == 0) {
394 _mesa_error(ctx
, GL_INVALID_OPERATION
,
395 "glGetFragDataLocation(illegal name)");
399 /* Not having a fragment shader is not an error.
401 if (shProg
->_LinkedShaders
[MESA_SHADER_FRAGMENT
] == NULL
)
404 unsigned array_index
= 0;
405 struct gl_program_resource
*res
=
406 _mesa_program_resource_find_name(shProg
, GL_PROGRAM_OUTPUT
, name
,
412 GLint loc
= program_resource_location(shProg
, res
, name
, array_index
);
414 /* The extra check against against 0 is made because of builtin-attribute
415 * locations that have offset applied. Function program_resource_location
416 * can return built-in attribute locations < 0 and glGetFragDataLocation
417 * cannot be used on "conventional" attributes.
419 * From page 95 of the OpenGL 3.0 spec:
421 * "If name is not an active attribute, if name is a conventional
422 * attribute, or if an error occurs, -1 will be returned."
424 return (loc
>= 0) ? loc
: -1;
428 _mesa_program_resource_name(struct gl_program_resource
*res
)
430 const ir_variable
*var
;
432 case GL_UNIFORM_BLOCK
:
433 case GL_SHADER_STORAGE_BLOCK
:
434 return RESOURCE_UBO(res
)->Name
;
435 case GL_TRANSFORM_FEEDBACK_VARYING
:
436 return RESOURCE_XFB(res
)->Name
;
437 case GL_PROGRAM_INPUT
:
438 var
= RESOURCE_VAR(res
);
439 /* Special case gl_VertexIDMESA -> gl_VertexID. */
440 if (var
->data
.mode
== ir_var_system_value
&&
441 var
->data
.location
== SYSTEM_VALUE_VERTEX_ID_ZERO_BASE
) {
442 return "gl_VertexID";
445 case GL_PROGRAM_OUTPUT
:
446 return RESOURCE_VAR(res
)->name
;
448 case GL_BUFFER_VARIABLE
:
449 return RESOURCE_UNI(res
)->name
;
450 case GL_VERTEX_SUBROUTINE_UNIFORM
:
451 case GL_GEOMETRY_SUBROUTINE_UNIFORM
:
452 case GL_FRAGMENT_SUBROUTINE_UNIFORM
:
453 case GL_COMPUTE_SUBROUTINE_UNIFORM
:
454 case GL_TESS_CONTROL_SUBROUTINE_UNIFORM
:
455 case GL_TESS_EVALUATION_SUBROUTINE_UNIFORM
:
456 return RESOURCE_UNI(res
)->name
+ MESA_SUBROUTINE_PREFIX_LEN
;
457 case GL_VERTEX_SUBROUTINE
:
458 case GL_GEOMETRY_SUBROUTINE
:
459 case GL_FRAGMENT_SUBROUTINE
:
460 case GL_COMPUTE_SUBROUTINE
:
461 case GL_TESS_CONTROL_SUBROUTINE
:
462 case GL_TESS_EVALUATION_SUBROUTINE
:
463 return RESOURCE_SUB(res
)->name
;
465 assert(!"support for resource type not implemented");
472 _mesa_program_resource_array_size(struct gl_program_resource
*res
)
475 case GL_TRANSFORM_FEEDBACK_VARYING
:
476 return RESOURCE_XFB(res
)->Size
> 1 ?
477 RESOURCE_XFB(res
)->Size
: 0;
478 case GL_PROGRAM_INPUT
:
479 case GL_PROGRAM_OUTPUT
:
480 return RESOURCE_VAR(res
)->type
->length
;
482 case GL_VERTEX_SUBROUTINE_UNIFORM
:
483 case GL_GEOMETRY_SUBROUTINE_UNIFORM
:
484 case GL_FRAGMENT_SUBROUTINE_UNIFORM
:
485 case GL_COMPUTE_SUBROUTINE_UNIFORM
:
486 case GL_TESS_CONTROL_SUBROUTINE_UNIFORM
:
487 case GL_TESS_EVALUATION_SUBROUTINE_UNIFORM
:
488 case GL_BUFFER_VARIABLE
:
489 return RESOURCE_UNI(res
)->array_elements
;
490 case GL_VERTEX_SUBROUTINE
:
491 case GL_GEOMETRY_SUBROUTINE
:
492 case GL_FRAGMENT_SUBROUTINE
:
493 case GL_COMPUTE_SUBROUTINE
:
494 case GL_TESS_CONTROL_SUBROUTINE
:
495 case GL_TESS_EVALUATION_SUBROUTINE
:
496 case GL_ATOMIC_COUNTER_BUFFER
:
497 case GL_UNIFORM_BLOCK
:
498 case GL_SHADER_STORAGE_BLOCK
:
501 assert(!"support for resource type not implemented");
507 * Checks if array subscript is valid and if so sets array_index.
510 valid_array_index(const GLchar
*name
, unsigned *array_index
)
513 const GLchar
*out_base_name_end
;
515 idx
= parse_program_resource_name(name
, &out_base_name_end
);
525 /* Find a program resource with specific name in given interface.
527 struct gl_program_resource
*
528 _mesa_program_resource_find_name(struct gl_shader_program
*shProg
,
529 GLenum programInterface
, const char *name
,
530 unsigned *array_index
)
532 struct gl_program_resource
*res
= shProg
->ProgramResourceList
;
533 for (unsigned i
= 0; i
< shProg
->NumProgramResourceList
; i
++, res
++) {
534 if (res
->Type
!= programInterface
)
537 /* Resource basename. */
538 const char *rname
= _mesa_program_resource_name(res
);
539 unsigned baselen
= strlen(rname
);
541 if (strncmp(rname
, name
, baselen
) == 0) {
542 switch (programInterface
) {
543 case GL_UNIFORM_BLOCK
:
544 case GL_SHADER_STORAGE_BLOCK
:
545 /* Basename match, check if array or struct. */
546 if (name
[baselen
] == '\0' ||
547 name
[baselen
] == '[' ||
548 name
[baselen
] == '.') {
552 case GL_TRANSFORM_FEEDBACK_VARYING
:
553 case GL_BUFFER_VARIABLE
:
555 case GL_VERTEX_SUBROUTINE_UNIFORM
:
556 case GL_GEOMETRY_SUBROUTINE_UNIFORM
:
557 case GL_FRAGMENT_SUBROUTINE_UNIFORM
:
558 case GL_COMPUTE_SUBROUTINE_UNIFORM
:
559 case GL_TESS_CONTROL_SUBROUTINE_UNIFORM
:
560 case GL_TESS_EVALUATION_SUBROUTINE_UNIFORM
:
561 case GL_VERTEX_SUBROUTINE
:
562 case GL_GEOMETRY_SUBROUTINE
:
563 case GL_FRAGMENT_SUBROUTINE
:
564 case GL_COMPUTE_SUBROUTINE
:
565 case GL_TESS_CONTROL_SUBROUTINE
:
566 case GL_TESS_EVALUATION_SUBROUTINE
:
567 if (name
[baselen
] == '.') {
571 case GL_PROGRAM_INPUT
:
572 case GL_PROGRAM_OUTPUT
:
573 if (name
[baselen
] == '\0') {
575 } else if (name
[baselen
] == '[' &&
576 valid_array_index(name
, array_index
)) {
581 assert(!"not implemented for given interface");
589 calc_resource_index(struct gl_shader_program
*shProg
,
590 struct gl_program_resource
*res
)
594 for (i
= 0; i
< shProg
->NumProgramResourceList
; i
++) {
595 if (&shProg
->ProgramResourceList
[i
] == res
)
597 if (shProg
->ProgramResourceList
[i
].Type
== res
->Type
)
600 return GL_INVALID_INDEX
;
604 * Calculate index for the given resource.
607 _mesa_program_resource_index(struct gl_shader_program
*shProg
,
608 struct gl_program_resource
*res
)
611 return GL_INVALID_INDEX
;
614 case GL_UNIFORM_BLOCK
:
615 case GL_SHADER_STORAGE_BLOCK
:
616 return RESOURCE_UBO(res
)- shProg
->UniformBlocks
;
617 case GL_ATOMIC_COUNTER_BUFFER
:
618 return RESOURCE_ATC(res
) - shProg
->AtomicBuffers
;
619 case GL_TRANSFORM_FEEDBACK_VARYING
:
621 return calc_resource_index(shProg
, res
);
625 /* Find a program resource with specific index in given interface.
627 struct gl_program_resource
*
628 _mesa_program_resource_find_index(struct gl_shader_program
*shProg
,
629 GLenum programInterface
, GLuint index
)
631 struct gl_program_resource
*res
= shProg
->ProgramResourceList
;
634 for (unsigned i
= 0; i
< shProg
->NumProgramResourceList
; i
++, res
++) {
635 if (res
->Type
!= programInterface
)
639 case GL_UNIFORM_BLOCK
:
640 case GL_ATOMIC_COUNTER_BUFFER
:
641 case GL_SHADER_STORAGE_BLOCK
:
642 if (_mesa_program_resource_index(shProg
, res
) == index
)
645 case GL_TRANSFORM_FEEDBACK_VARYING
:
646 case GL_PROGRAM_INPUT
:
647 case GL_PROGRAM_OUTPUT
:
649 case GL_VERTEX_SUBROUTINE_UNIFORM
:
650 case GL_GEOMETRY_SUBROUTINE_UNIFORM
:
651 case GL_FRAGMENT_SUBROUTINE_UNIFORM
:
652 case GL_COMPUTE_SUBROUTINE_UNIFORM
:
653 case GL_TESS_CONTROL_SUBROUTINE_UNIFORM
:
654 case GL_TESS_EVALUATION_SUBROUTINE_UNIFORM
:
655 case GL_VERTEX_SUBROUTINE
:
656 case GL_GEOMETRY_SUBROUTINE
:
657 case GL_FRAGMENT_SUBROUTINE
:
658 case GL_COMPUTE_SUBROUTINE
:
659 case GL_TESS_CONTROL_SUBROUTINE
:
660 case GL_TESS_EVALUATION_SUBROUTINE
:
661 case GL_BUFFER_VARIABLE
:
662 if (++idx
== (int) index
)
666 assert(!"not implemented for given interface");
672 /* Function returns if resource name is expected to have index
676 * Page 61 (page 73 of the PDF) in section 2.11 of the OpenGL ES 3.0
679 * "If the active uniform is an array, the uniform name returned in
680 * name will always be the name of the uniform array appended with
683 * The same text also appears in the OpenGL 4.2 spec. It does not,
684 * however, appear in any previous spec. Previous specifications are
685 * ambiguous in this regard. However, either name can later be passed
686 * to glGetUniformLocation (and related APIs), so there shouldn't be any
687 * harm in always appending "[0]" to uniform array names.
689 * Geometry shader stage has different naming convention where the 'normal'
690 * condition is an array, therefore for variables referenced in geometry
691 * stage we do not add '[0]'.
693 * Note, that TCS outputs and TES inputs should not have index appended
697 add_index_to_name(struct gl_program_resource
*res
)
699 bool add_index
= !(((res
->Type
== GL_PROGRAM_INPUT
) &&
700 res
->StageReferences
& (1 << MESA_SHADER_GEOMETRY
)));
702 /* Transform feedback varyings have array index already appended
705 if (res
->Type
== GL_TRANSFORM_FEEDBACK_VARYING
)
711 /* Get name length of a program resource. This consists of
712 * base name + 3 for '[0]' if resource is an array.
715 _mesa_program_resource_name_len(struct gl_program_resource
*res
)
717 unsigned length
= strlen(_mesa_program_resource_name(res
));
718 if (_mesa_program_resource_array_size(res
) && add_index_to_name(res
))
723 /* Get full name of a program resource.
726 _mesa_get_program_resource_name(struct gl_shader_program
*shProg
,
727 GLenum programInterface
, GLuint index
,
728 GLsizei bufSize
, GLsizei
*length
,
729 GLchar
*name
, const char *caller
)
731 GET_CURRENT_CONTEXT(ctx
);
733 /* Find resource with given interface and index. */
734 struct gl_program_resource
*res
=
735 _mesa_program_resource_find_index(shProg
, programInterface
, index
);
737 /* The error INVALID_VALUE is generated if <index> is greater than
738 * or equal to the number of entries in the active resource list for
739 * <programInterface>.
742 _mesa_error(ctx
, GL_INVALID_VALUE
, "%s(index %u)", caller
, index
);
747 _mesa_error(ctx
, GL_INVALID_VALUE
, "%s(bufSize %d)", caller
, bufSize
);
754 length
= &localLength
;
756 _mesa_copy_string(name
, bufSize
, length
, _mesa_program_resource_name(res
));
758 if (_mesa_program_resource_array_size(res
) && add_index_to_name(res
)) {
761 /* The comparison is strange because *length does *NOT* include the
762 * terminating NUL, but maxLength does.
764 for (i
= 0; i
< 3 && (*length
+ i
+ 1) < bufSize
; i
++)
765 name
[*length
+ i
] = "[0]"[i
];
767 name
[*length
+ i
] = '\0';
774 program_resource_location(struct gl_shader_program
*shProg
,
775 struct gl_program_resource
*res
, const char *name
,
776 unsigned array_index
)
778 /* Built-in locations should report GL_INVALID_INDEX. */
779 if (is_gl_identifier(name
))
780 return GL_INVALID_INDEX
;
782 /* VERT_ATTRIB_GENERIC0 and FRAG_RESULT_DATA0 are decremented as these
783 * offsets are used internally to differentiate between built-in attributes
784 * and user-defined attributes.
787 case GL_PROGRAM_INPUT
:
788 /* If the input is an array, fail if the index is out of bounds. */
790 && array_index
>= RESOURCE_VAR(res
)->type
->length
) {
793 return RESOURCE_VAR(res
)->data
.location
+ array_index
- VERT_ATTRIB_GENERIC0
;
794 case GL_PROGRAM_OUTPUT
:
795 /* If the output is an array, fail if the index is out of bounds. */
797 && array_index
>= RESOURCE_VAR(res
)->type
->length
) {
800 return RESOURCE_VAR(res
)->data
.location
+ array_index
- FRAG_RESULT_DATA0
;
802 /* If the uniform is built-in, fail. */
803 if (RESOURCE_UNI(res
)->builtin
)
806 /* From the GL_ARB_uniform_buffer_object spec:
808 * "The value -1 will be returned if <name> does not correspond to an
809 * active uniform variable name in <program>, if <name> is associated
810 * with a named uniform block, or if <name> starts with the reserved
813 if (RESOURCE_UNI(res
)->block_index
!= -1 ||
814 RESOURCE_UNI(res
)->atomic_buffer_index
!= -1)
818 case GL_VERTEX_SUBROUTINE_UNIFORM
:
819 case GL_GEOMETRY_SUBROUTINE_UNIFORM
:
820 case GL_FRAGMENT_SUBROUTINE_UNIFORM
:
821 case GL_COMPUTE_SUBROUTINE_UNIFORM
:
822 case GL_TESS_CONTROL_SUBROUTINE_UNIFORM
:
823 case GL_TESS_EVALUATION_SUBROUTINE_UNIFORM
:
824 /* If the uniform is an array, fail if the index is out of bounds. */
826 && array_index
>= RESOURCE_UNI(res
)->array_elements
) {
830 /* location in remap table + array element offset */
831 return RESOURCE_UNI(res
)->remap_location
+ array_index
;
838 get_top_level_name(const char *name
)
840 const char *first_dot
= strchr(name
, '.');
841 const char *first_square_bracket
= strchr(name
, '[');
843 /* From ARB_program_interface_query spec:
845 * "For the property TOP_LEVEL_ARRAY_SIZE, a single integer identifying the
846 * number of active array elements of the top-level shader storage block
847 * member containing to the active variable is written to <params>. If the
848 * top-level block member is not declared as an array, the value one is
849 * written to <params>. If the top-level block member is an array with no
850 * declared size, the value zero is written to <params>.
853 /* The buffer variable is on top level.*/
854 if (!first_square_bracket
&& !first_dot
)
855 name_size
= strlen(name
);
856 else if ((!first_square_bracket
||
857 (first_dot
&& first_dot
< first_square_bracket
)))
858 name_size
= first_dot
- name
;
860 name_size
= first_square_bracket
- name
;
862 return strndup(name
, name_size
);
866 get_var_name(const char *name
)
868 const char *first_dot
= strchr(name
, '.');
873 return strndup(first_dot
+1, strlen(first_dot
) - 1);
877 program_resource_top_level_array_size(struct gl_shader_program
*shProg
,
878 struct gl_program_resource
*res
,
881 int block_index
= RESOURCE_UNI(res
)->block_index
;
883 char *var_name
= get_top_level_name(name
);
884 char *interface_name
=
885 get_top_level_name(shProg
->UniformBlocks
[block_index
].Name
);
887 if (strcmp(var_name
, interface_name
) == 0) {
888 /* Deal with instanced array of SSBOs */
889 char *temp_name
= get_var_name(name
);
891 var_name
= get_top_level_name(temp_name
);
895 for (unsigned i
= 0; i
< shProg
->NumShaders
; i
++) {
896 if (shProg
->Shaders
[i
] == NULL
)
899 const gl_shader
*stage
= shProg
->Shaders
[i
];
900 foreach_in_list(ir_instruction
, node
, stage
->ir
) {
901 ir_variable
*var
= node
->as_variable();
902 if (!var
|| !var
->get_interface_type() ||
903 var
->data
.mode
!= ir_var_shader_storage
)
906 const glsl_type
*interface
= var
->get_interface_type();
908 if (strcmp(interface_name
, interface
->name
) != 0)
911 for (unsigned i
= 0; i
< interface
->length
; i
++) {
912 const glsl_struct_field
*field
= &interface
->fields
.structure
[i
];
913 if (strcmp(field
->name
, var_name
) != 0)
915 /* From GL_ARB_program_interface_query spec:
917 * "For the property TOP_LEVEL_ARRAY_SIZE, a single integer
918 * identifying the number of active array elements of the top-level
919 * shader storage block member containing to the active variable is
920 * written to <params>. If the top-level block member is not
921 * declared as an array, the value one is written to <params>. If
922 * the top-level block member is an array with no declared size,
923 * the value zero is written to <params>.
925 if (field
->type
->is_unsized_array())
927 else if (field
->type
->is_array())
928 array_size
= field
->type
->length
;
931 goto found_top_level_array_size
;
935 found_top_level_array_size
:
936 free(interface_name
);
942 program_resource_top_level_array_stride(struct gl_shader_program
*shProg
,
943 struct gl_program_resource
*res
,
946 int block_index
= RESOURCE_UNI(res
)->block_index
;
947 int array_stride
= -1;
948 char *var_name
= get_top_level_name(name
);
949 char *interface_name
=
950 get_top_level_name(shProg
->UniformBlocks
[block_index
].Name
);
952 if (strcmp(var_name
, interface_name
) == 0) {
953 /* Deal with instanced array of SSBOs */
954 char *temp_name
= get_var_name(name
);
956 var_name
= get_top_level_name(temp_name
);
960 for (unsigned i
= 0; i
< shProg
->NumShaders
; i
++) {
961 if (shProg
->Shaders
[i
] == NULL
)
964 const gl_shader
*stage
= shProg
->Shaders
[i
];
965 foreach_in_list(ir_instruction
, node
, stage
->ir
) {
966 ir_variable
*var
= node
->as_variable();
967 if (!var
|| !var
->get_interface_type() ||
968 var
->data
.mode
!= ir_var_shader_storage
)
971 const glsl_type
*interface
= var
->get_interface_type();
973 if (strcmp(interface_name
, interface
->name
) != 0) {
977 for (unsigned i
= 0; i
< interface
->length
; i
++) {
978 const glsl_struct_field
*field
= &interface
->fields
.structure
[i
];
979 if (strcmp(field
->name
, var_name
) != 0)
981 /* From GL_ARB_program_interface_query:
983 * "For the property TOP_LEVEL_ARRAY_STRIDE, a single integer
984 * identifying the stride between array elements of the top-level
985 * shader storage block member containing the active variable is
986 * written to <params>. For top-level block members declared as
987 * arrays, the value written is the difference, in basic machine
988 * units, between the offsets of the active variable for
989 * consecutive elements in the top-level array. For top-level
990 * block members not declared as an array, zero is written to
993 if (field
->type
->is_array()) {
994 const enum glsl_matrix_layout matrix_layout
=
995 glsl_matrix_layout(field
->matrix_layout
);
996 bool row_major
= matrix_layout
== GLSL_MATRIX_LAYOUT_ROW_MAJOR
;
997 const glsl_type
*array_type
= field
->type
->fields
.array
;
999 if (interface
->interface_packing
!= GLSL_INTERFACE_PACKING_STD430
) {
1000 if (array_type
->is_record()) {
1001 array_stride
= array_type
->std140_size(row_major
);
1002 array_stride
= glsl_align(array_stride
, 16);
1004 unsigned element_base_align
= 0;
1005 element_base_align
= array_type
->std140_base_alignment(row_major
);
1006 array_stride
= MAX2(element_base_align
, 16);
1009 array_stride
= array_type
->std430_array_stride(row_major
);
1014 goto found_top_level_array_size
;
1018 found_top_level_array_size
:
1019 free(interface_name
);
1021 return array_stride
;
1025 * Function implements following location queries:
1026 * glGetUniformLocation
1029 _mesa_program_resource_location(struct gl_shader_program
*shProg
,
1030 GLenum programInterface
, const char *name
)
1032 unsigned array_index
= 0;
1033 struct gl_program_resource
*res
=
1034 _mesa_program_resource_find_name(shProg
, programInterface
, name
,
1037 /* Resource not found. */
1041 return program_resource_location(shProg
, res
, name
, array_index
);
1045 * Function implements following index queries:
1046 * glGetFragDataIndex
1049 _mesa_program_resource_location_index(struct gl_shader_program
*shProg
,
1050 GLenum programInterface
, const char *name
)
1052 struct gl_program_resource
*res
=
1053 _mesa_program_resource_find_name(shProg
, programInterface
, name
, NULL
);
1055 /* Non-existent variable or resource is not referenced by fragment stage. */
1056 if (!res
|| !(res
->StageReferences
& (1 << MESA_SHADER_FRAGMENT
)))
1059 return RESOURCE_VAR(res
)->data
.index
;
1063 stage_from_enum(GLenum ref
)
1066 case GL_REFERENCED_BY_VERTEX_SHADER
:
1067 return MESA_SHADER_VERTEX
;
1068 case GL_REFERENCED_BY_TESS_CONTROL_SHADER
:
1069 return MESA_SHADER_TESS_CTRL
;
1070 case GL_REFERENCED_BY_TESS_EVALUATION_SHADER
:
1071 return MESA_SHADER_TESS_EVAL
;
1072 case GL_REFERENCED_BY_GEOMETRY_SHADER
:
1073 return MESA_SHADER_GEOMETRY
;
1074 case GL_REFERENCED_BY_FRAGMENT_SHADER
:
1075 return MESA_SHADER_FRAGMENT
;
1076 case GL_REFERENCED_BY_COMPUTE_SHADER
:
1077 return MESA_SHADER_COMPUTE
;
1079 assert(!"shader stage not supported");
1080 return MESA_SHADER_STAGES
;
1085 * Check if resource is referenced by given 'referenced by' stage enum.
1086 * ATC and UBO resources hold stage references of their own.
1089 is_resource_referenced(struct gl_shader_program
*shProg
,
1090 struct gl_program_resource
*res
,
1091 GLuint index
, uint8_t stage
)
1093 /* First, check if we even have such a stage active. */
1094 if (!shProg
->_LinkedShaders
[stage
])
1097 if (res
->Type
== GL_ATOMIC_COUNTER_BUFFER
)
1098 return RESOURCE_ATC(res
)->StageReferences
[stage
];
1100 if (res
->Type
== GL_UNIFORM_BLOCK
|| res
->Type
== GL_SHADER_STORAGE_BLOCK
)
1101 return shProg
->UniformBlockStageIndex
[stage
][index
] != -1;
1103 return res
->StageReferences
& (1 << stage
);
1107 get_buffer_property(struct gl_shader_program
*shProg
,
1108 struct gl_program_resource
*res
, const GLenum prop
,
1109 GLint
*val
, const char *caller
)
1111 GET_CURRENT_CONTEXT(ctx
);
1112 if (res
->Type
!= GL_UNIFORM_BLOCK
&&
1113 res
->Type
!= GL_ATOMIC_COUNTER_BUFFER
&&
1114 res
->Type
!= GL_SHADER_STORAGE_BLOCK
)
1115 goto invalid_operation
;
1117 if (res
->Type
== GL_UNIFORM_BLOCK
) {
1119 case GL_BUFFER_BINDING
:
1120 *val
= RESOURCE_UBO(res
)->Binding
;
1122 case GL_BUFFER_DATA_SIZE
:
1123 *val
= RESOURCE_UBO(res
)->UniformBufferSize
;
1125 case GL_NUM_ACTIVE_VARIABLES
:
1127 for (unsigned i
= 0; i
< RESOURCE_UBO(res
)->NumUniforms
; i
++) {
1128 const char *iname
= RESOURCE_UBO(res
)->Uniforms
[i
].IndexName
;
1129 struct gl_program_resource
*uni
=
1130 _mesa_program_resource_find_name(shProg
, GL_UNIFORM
, iname
,
1137 case GL_ACTIVE_VARIABLES
:
1138 for (unsigned i
= 0; i
< RESOURCE_UBO(res
)->NumUniforms
; i
++) {
1139 const char *iname
= RESOURCE_UBO(res
)->Uniforms
[i
].IndexName
;
1140 struct gl_program_resource
*uni
=
1141 _mesa_program_resource_find_name(shProg
, GL_UNIFORM
, iname
,
1146 _mesa_program_resource_index(shProg
, uni
);
1148 return RESOURCE_UBO(res
)->NumUniforms
;
1150 } else if (res
->Type
== GL_SHADER_STORAGE_BLOCK
) {
1152 case GL_BUFFER_BINDING
:
1153 *val
= RESOURCE_UBO(res
)->Binding
;
1155 case GL_BUFFER_DATA_SIZE
:
1156 *val
= RESOURCE_UBO(res
)->UniformBufferSize
;
1158 case GL_NUM_ACTIVE_VARIABLES
:
1160 for (unsigned i
= 0; i
< RESOURCE_UBO(res
)->NumUniforms
; i
++) {
1161 const char *iname
= RESOURCE_UBO(res
)->Uniforms
[i
].IndexName
;
1162 struct gl_program_resource
*uni
=
1163 _mesa_program_resource_find_name(shProg
, GL_BUFFER_VARIABLE
,
1170 case GL_ACTIVE_VARIABLES
:
1171 for (unsigned i
= 0; i
< RESOURCE_UBO(res
)->NumUniforms
; i
++) {
1172 const char *iname
= RESOURCE_UBO(res
)->Uniforms
[i
].IndexName
;
1173 struct gl_program_resource
*uni
=
1174 _mesa_program_resource_find_name(shProg
, GL_BUFFER_VARIABLE
,
1179 _mesa_program_resource_index(shProg
, uni
);
1181 return RESOURCE_UBO(res
)->NumUniforms
;
1183 } else if (res
->Type
== GL_ATOMIC_COUNTER_BUFFER
) {
1185 case GL_BUFFER_BINDING
:
1186 *val
= RESOURCE_ATC(res
)->Binding
;
1188 case GL_BUFFER_DATA_SIZE
:
1189 *val
= RESOURCE_ATC(res
)->MinimumSize
;
1191 case GL_NUM_ACTIVE_VARIABLES
:
1192 *val
= RESOURCE_ATC(res
)->NumUniforms
;
1194 case GL_ACTIVE_VARIABLES
:
1195 for (unsigned i
= 0; i
< RESOURCE_ATC(res
)->NumUniforms
; i
++)
1196 *val
++ = RESOURCE_ATC(res
)->Uniforms
[i
];
1197 return RESOURCE_ATC(res
)->NumUniforms
;
1200 assert(!"support for property type not implemented");
1203 _mesa_error(ctx
, GL_INVALID_OPERATION
, "%s(%s prop %s)", caller
,
1204 _mesa_enum_to_string(res
->Type
),
1205 _mesa_enum_to_string(prop
));
1211 _mesa_program_resource_prop(struct gl_shader_program
*shProg
,
1212 struct gl_program_resource
*res
, GLuint index
,
1213 const GLenum prop
, GLint
*val
, const char *caller
)
1215 GET_CURRENT_CONTEXT(ctx
);
1217 #define VALIDATE_TYPE(type)\
1218 if (res->Type != type)\
1219 goto invalid_operation;
1221 #define VALIDATE_TYPE_2(type1, type2)\
1222 if (res->Type != type1 && res->Type != type2)\
1223 goto invalid_operation;
1226 case GL_NAME_LENGTH
:
1227 switch (res
->Type
) {
1228 case GL_ATOMIC_COUNTER_BUFFER
:
1229 goto invalid_operation
;
1231 /* Resource name length + terminator. */
1232 *val
= _mesa_program_resource_name_len(res
) + 1;
1236 switch (res
->Type
) {
1238 case GL_BUFFER_VARIABLE
:
1239 *val
= RESOURCE_UNI(res
)->type
->gl_type
;
1241 case GL_PROGRAM_INPUT
:
1242 case GL_PROGRAM_OUTPUT
:
1243 *val
= RESOURCE_VAR(res
)->type
->gl_type
;
1245 case GL_TRANSFORM_FEEDBACK_VARYING
:
1246 *val
= RESOURCE_XFB(res
)->Type
;
1249 goto invalid_operation
;
1252 switch (res
->Type
) {
1254 case GL_BUFFER_VARIABLE
:
1255 *val
= MAX2(RESOURCE_UNI(res
)->array_elements
, 1);
1257 case GL_PROGRAM_INPUT
:
1258 case GL_PROGRAM_OUTPUT
:
1259 *val
= MAX2(_mesa_program_resource_array_size(res
), 1);
1261 case GL_TRANSFORM_FEEDBACK_VARYING
:
1262 *val
= MAX2(RESOURCE_XFB(res
)->Size
, 1);
1265 goto invalid_operation
;
1268 VALIDATE_TYPE_2(GL_UNIFORM
, GL_BUFFER_VARIABLE
);
1269 *val
= RESOURCE_UNI(res
)->offset
;
1271 case GL_BLOCK_INDEX
:
1272 VALIDATE_TYPE_2(GL_UNIFORM
, GL_BUFFER_VARIABLE
);
1273 *val
= RESOURCE_UNI(res
)->block_index
;
1275 case GL_ARRAY_STRIDE
:
1276 VALIDATE_TYPE_2(GL_UNIFORM
, GL_BUFFER_VARIABLE
);
1277 *val
= RESOURCE_UNI(res
)->array_stride
;
1279 case GL_MATRIX_STRIDE
:
1280 VALIDATE_TYPE_2(GL_UNIFORM
, GL_BUFFER_VARIABLE
);
1281 *val
= RESOURCE_UNI(res
)->matrix_stride
;
1283 case GL_IS_ROW_MAJOR
:
1284 VALIDATE_TYPE_2(GL_UNIFORM
, GL_BUFFER_VARIABLE
);
1285 *val
= RESOURCE_UNI(res
)->row_major
;
1287 case GL_ATOMIC_COUNTER_BUFFER_INDEX
:
1288 VALIDATE_TYPE(GL_UNIFORM
);
1289 *val
= RESOURCE_UNI(res
)->atomic_buffer_index
;
1291 case GL_BUFFER_BINDING
:
1292 case GL_BUFFER_DATA_SIZE
:
1293 case GL_NUM_ACTIVE_VARIABLES
:
1294 case GL_ACTIVE_VARIABLES
:
1295 return get_buffer_property(shProg
, res
, prop
, val
, caller
);
1296 case GL_REFERENCED_BY_COMPUTE_SHADER
:
1297 if (!_mesa_has_compute_shaders(ctx
))
1300 case GL_REFERENCED_BY_VERTEX_SHADER
:
1301 case GL_REFERENCED_BY_TESS_CONTROL_SHADER
:
1302 case GL_REFERENCED_BY_TESS_EVALUATION_SHADER
:
1303 case GL_REFERENCED_BY_GEOMETRY_SHADER
:
1304 case GL_REFERENCED_BY_FRAGMENT_SHADER
:
1305 switch (res
->Type
) {
1307 case GL_PROGRAM_INPUT
:
1308 case GL_PROGRAM_OUTPUT
:
1309 case GL_UNIFORM_BLOCK
:
1310 case GL_BUFFER_VARIABLE
:
1311 case GL_SHADER_STORAGE_BLOCK
:
1312 case GL_ATOMIC_COUNTER_BUFFER
:
1313 *val
= is_resource_referenced(shProg
, res
, index
,
1314 stage_from_enum(prop
));
1317 goto invalid_operation
;
1320 switch (res
->Type
) {
1322 case GL_PROGRAM_INPUT
:
1323 case GL_PROGRAM_OUTPUT
:
1324 *val
= program_resource_location(shProg
, res
,
1325 _mesa_program_resource_name(res
),
1329 goto invalid_operation
;
1331 case GL_LOCATION_INDEX
:
1332 if (res
->Type
!= GL_PROGRAM_OUTPUT
)
1333 goto invalid_operation
;
1334 *val
= RESOURCE_VAR(res
)->data
.index
;
1337 case GL_NUM_COMPATIBLE_SUBROUTINES
:
1338 if (res
->Type
!= GL_VERTEX_SUBROUTINE_UNIFORM
&&
1339 res
->Type
!= GL_FRAGMENT_SUBROUTINE_UNIFORM
&&
1340 res
->Type
!= GL_GEOMETRY_SUBROUTINE_UNIFORM
&&
1341 res
->Type
!= GL_COMPUTE_SUBROUTINE_UNIFORM
&&
1342 res
->Type
!= GL_TESS_CONTROL_SUBROUTINE_UNIFORM
&&
1343 res
->Type
!= GL_TESS_EVALUATION_SUBROUTINE_UNIFORM
)
1344 goto invalid_operation
;
1345 *val
= RESOURCE_UNI(res
)->num_compatible_subroutines
;
1347 case GL_COMPATIBLE_SUBROUTINES
: {
1348 const struct gl_uniform_storage
*uni
;
1349 struct gl_shader
*sh
;
1353 if (res
->Type
!= GL_VERTEX_SUBROUTINE_UNIFORM
&&
1354 res
->Type
!= GL_FRAGMENT_SUBROUTINE_UNIFORM
&&
1355 res
->Type
!= GL_GEOMETRY_SUBROUTINE_UNIFORM
&&
1356 res
->Type
!= GL_COMPUTE_SUBROUTINE_UNIFORM
&&
1357 res
->Type
!= GL_TESS_CONTROL_SUBROUTINE_UNIFORM
&&
1358 res
->Type
!= GL_TESS_EVALUATION_SUBROUTINE_UNIFORM
)
1359 goto invalid_operation
;
1360 uni
= RESOURCE_UNI(res
);
1362 sh
= shProg
->_LinkedShaders
[_mesa_shader_stage_from_subroutine_uniform(res
->Type
)];
1364 for (i
= 0; i
< sh
->NumSubroutineFunctions
; i
++) {
1365 struct gl_subroutine_function
*fn
= &sh
->SubroutineFunctions
[i
];
1366 for (j
= 0; j
< fn
->num_compat_types
; j
++) {
1367 if (fn
->types
[j
] == uni
->type
) {
1376 case GL_TOP_LEVEL_ARRAY_SIZE
:
1377 VALIDATE_TYPE(GL_BUFFER_VARIABLE
);
1378 *val
= program_resource_top_level_array_size(shProg
, res
,
1379 _mesa_program_resource_name(res
));
1382 case GL_TOP_LEVEL_ARRAY_STRIDE
:
1383 VALIDATE_TYPE(GL_BUFFER_VARIABLE
);
1384 *val
= program_resource_top_level_array_stride(shProg
, res
,
1385 _mesa_program_resource_name(res
));
1388 /* GL_ARB_tessellation_shader */
1389 case GL_IS_PER_PATCH
:
1390 switch (res
->Type
) {
1391 case GL_PROGRAM_INPUT
:
1392 case GL_PROGRAM_OUTPUT
:
1393 *val
= RESOURCE_VAR(res
)->data
.patch
;
1396 goto invalid_operation
;
1402 #undef VALIDATE_TYPE
1403 #undef VALIDATE_TYPE_2
1406 _mesa_error(ctx
, GL_INVALID_ENUM
, "%s(%s prop %s)", caller
,
1407 _mesa_enum_to_string(res
->Type
),
1408 _mesa_enum_to_string(prop
));
1412 _mesa_error(ctx
, GL_INVALID_OPERATION
, "%s(%s prop %s)", caller
,
1413 _mesa_enum_to_string(res
->Type
),
1414 _mesa_enum_to_string(prop
));
1419 _mesa_get_program_resourceiv(struct gl_shader_program
*shProg
,
1420 GLenum programInterface
, GLuint index
, GLsizei propCount
,
1421 const GLenum
*props
, GLsizei bufSize
,
1422 GLsizei
*length
, GLint
*params
)
1424 GET_CURRENT_CONTEXT(ctx
);
1425 GLint
*val
= (GLint
*) params
;
1426 const GLenum
*prop
= props
;
1429 struct gl_program_resource
*res
=
1430 _mesa_program_resource_find_index(shProg
, programInterface
, index
);
1432 /* No such resource found or bufSize negative. */
1433 if (!res
|| bufSize
< 0) {
1434 _mesa_error(ctx
, GL_INVALID_VALUE
,
1435 "glGetProgramResourceiv(%s index %d bufSize %d)",
1436 _mesa_enum_to_string(programInterface
), index
, bufSize
);
1440 /* Write propCount values until error occurs or bufSize reached. */
1441 for (int i
= 0; i
< propCount
&& i
< bufSize
; i
++, val
++, prop
++) {
1443 _mesa_program_resource_prop(shProg
, res
, index
, *prop
, val
,
1444 "glGetProgramResourceiv");
1446 /* Error happened. */
1447 if (props_written
== 0)
1450 amount
+= props_written
;
1453 /* If <length> is not NULL, the actual number of integer values
1454 * written to <params> will be written to <length>.