1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
|
<!DOCTYPE refentry [ <!ENTITY % mathent SYSTEM "math.ent"> %mathent; ]>
<!-- Converted by db4-upgrade version 1.1 -->
<refentry xmlns="http://docbook.org/ns/docbook" version="5.0" xml:id="glProgramUniform">
<info>
<copyright>
<year>2003-2005</year>
<holder>3Dlabs Inc. Ltd.</holder>
</copyright>
<copyright>
<year>2010-2014</year>
<holder>Khronos Group</holder>
</copyright>
</info>
<refmeta>
<refentrytitle>glProgramUniform</refentrytitle>
<manvolnum>3G</manvolnum>
</refmeta>
<refnamediv>
<refdescriptor>glProgramUniform</refdescriptor>
<refname>glProgramUniform1f</refname>
<refname>glProgramUniform2f</refname>
<refname>glProgramUniform3f</refname>
<refname>glProgramUniform4f</refname>
<refname>glProgramUniform1i</refname>
<refname>glProgramUniform2i</refname>
<refname>glProgramUniform3i</refname>
<refname>glProgramUniform4i</refname>
<refname>glProgramUniform1ui</refname>
<refname>glProgramUniform2ui</refname>
<refname>glProgramUniform3ui</refname>
<refname>glProgramUniform4ui</refname>
<refname>glProgramUniform1fv</refname>
<refname>glProgramUniform2fv</refname>
<refname>glProgramUniform3fv</refname>
<refname>glProgramUniform4fv</refname>
<refname>glProgramUniform1iv</refname>
<refname>glProgramUniform2iv</refname>
<refname>glProgramUniform3iv</refname>
<refname>glProgramUniform4iv</refname>
<refname>glProgramUniform1uiv</refname>
<refname>glProgramUniform2uiv</refname>
<refname>glProgramUniform3uiv</refname>
<refname>glProgramUniform4uiv</refname>
<refname>glProgramUniformMatrix2fv</refname>
<refname>glProgramUniformMatrix3fv</refname>
<refname>glProgramUniformMatrix4fv</refname>
<refname>glProgramUniformMatrix2x3fv</refname>
<refname>glProgramUniformMatrix3x2fv</refname>
<refname>glProgramUniformMatrix2x4fv</refname>
<refname>glProgramUniformMatrix4x2fv</refname>
<refname>glProgramUniformMatrix3x4fv</refname>
<refname>glProgramUniformMatrix4x3fv</refname>
<refpurpose>Specify the value of a uniform variable for a specified program object</refpurpose>
</refnamediv>
<refsynopsisdiv><title>C Specification</title>
<funcsynopsis>
<funcprototype>
<funcdef>void <function>glProgramUniform1f</function></funcdef>
<paramdef>GLuint <parameter>program</parameter></paramdef>
<paramdef>GLint <parameter>location</parameter></paramdef>
<paramdef>GLfloat <parameter>v0</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>void <function>glProgramUniform2f</function></funcdef>
<paramdef>GLuint <parameter>program</parameter></paramdef>
<paramdef>GLint <parameter>location</parameter></paramdef>
<paramdef>GLfloat <parameter>v0</parameter></paramdef>
<paramdef>GLfloat <parameter>v1</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>void <function>glProgramUniform3f</function></funcdef>
<paramdef>GLuint <parameter>program</parameter></paramdef>
<paramdef>GLint <parameter>location</parameter></paramdef>
<paramdef>GLfloat <parameter>v0</parameter></paramdef>
<paramdef>GLfloat <parameter>v1</parameter></paramdef>
<paramdef>GLfloat <parameter>v2</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>void <function>glProgramUniform4f</function></funcdef>
<paramdef>GLuint <parameter>program</parameter></paramdef>
<paramdef>GLint <parameter>location</parameter></paramdef>
<paramdef>GLfloat <parameter>v0</parameter></paramdef>
<paramdef>GLfloat <parameter>v1</parameter></paramdef>
<paramdef>GLfloat <parameter>v2</parameter></paramdef>
<paramdef>GLfloat <parameter>v3</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>void <function>glProgramUniform1i</function></funcdef>
<paramdef>GLuint <parameter>program</parameter></paramdef>
<paramdef>GLint <parameter>location</parameter></paramdef>
<paramdef>GLint <parameter>v0</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>void <function>glProgramUniform2i</function></funcdef>
<paramdef>GLuint <parameter>program</parameter></paramdef>
<paramdef>GLint <parameter>location</parameter></paramdef>
<paramdef>GLint <parameter>v0</parameter></paramdef>
<paramdef>GLint <parameter>v1</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>void <function>glProgramUniform3i</function></funcdef>
<paramdef>GLuint <parameter>program</parameter></paramdef>
<paramdef>GLint <parameter>location</parameter></paramdef>
<paramdef>GLint <parameter>v0</parameter></paramdef>
<paramdef>GLint <parameter>v1</parameter></paramdef>
<paramdef>GLint <parameter>v2</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>void <function>glProgramUniform4i</function></funcdef>
<paramdef>GLuint <parameter>program</parameter></paramdef>
<paramdef>GLint <parameter>location</parameter></paramdef>
<paramdef>GLint <parameter>v0</parameter></paramdef>
<paramdef>GLint <parameter>v1</parameter></paramdef>
<paramdef>GLint <parameter>v2</parameter></paramdef>
<paramdef>GLint <parameter>v3</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>void <function>glProgramUniform1ui</function></funcdef>
<paramdef>GLuint <parameter>program</parameter></paramdef>
<paramdef>GLint <parameter>location</parameter></paramdef>
<paramdef>GLuint <parameter>v0</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>void <function>glProgramUniform2ui</function></funcdef>
<paramdef>GLuint <parameter>program</parameter></paramdef>
<paramdef>GLint <parameter>location</parameter></paramdef>
<paramdef>GLint <parameter>v0</parameter></paramdef>
<paramdef>GLuint <parameter>v1</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>void <function>glProgramUniform3ui</function></funcdef>
<paramdef>GLuint <parameter>program</parameter></paramdef>
<paramdef>GLint <parameter>location</parameter></paramdef>
<paramdef>GLint <parameter>v0</parameter></paramdef>
<paramdef>GLint <parameter>v1</parameter></paramdef>
<paramdef>GLuint <parameter>v2</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>void <function>glProgramUniform4ui</function></funcdef>
<paramdef>GLuint <parameter>program</parameter></paramdef>
<paramdef>GLint <parameter>location</parameter></paramdef>
<paramdef>GLint <parameter>v0</parameter></paramdef>
<paramdef>GLint <parameter>v1</parameter></paramdef>
<paramdef>GLint <parameter>v2</parameter></paramdef>
<paramdef>GLuint <parameter>v3</parameter></paramdef>
</funcprototype>
<!-- Vector commands -->
<funcprototype>
<funcdef>void <function>glProgramUniform1fv</function></funcdef>
<paramdef>GLuint <parameter>program</parameter></paramdef>
<paramdef>GLint <parameter>location</parameter></paramdef>
<paramdef>GLsizei <parameter>count</parameter></paramdef>
<paramdef>const GLfloat *<parameter>value</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>void <function>glProgramUniform2fv</function></funcdef>
<paramdef>GLuint <parameter>program</parameter></paramdef>
<paramdef>GLint <parameter>location</parameter></paramdef>
<paramdef>GLsizei <parameter>count</parameter></paramdef>
<paramdef>const GLfloat *<parameter>value</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>void <function>glProgramUniform3fv</function></funcdef>
<paramdef>GLuint <parameter>program</parameter></paramdef>
<paramdef>GLint <parameter>location</parameter></paramdef>
<paramdef>GLsizei <parameter>count</parameter></paramdef>
<paramdef>const GLfloat *<parameter>value</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>void <function>glProgramUniform4fv</function></funcdef>
<paramdef>GLuint <parameter>program</parameter></paramdef>
<paramdef>GLint <parameter>location</parameter></paramdef>
<paramdef>GLsizei <parameter>count</parameter></paramdef>
<paramdef>const GLfloat *<parameter>value</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>void <function>glProgramUniform1iv</function></funcdef>
<paramdef>GLuint <parameter>program</parameter></paramdef>
<paramdef>GLint <parameter>location</parameter></paramdef>
<paramdef>GLsizei <parameter>count</parameter></paramdef>
<paramdef>const GLint *<parameter>value</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>void <function>glProgramUniform2iv</function></funcdef>
<paramdef>GLuint <parameter>program</parameter></paramdef>
<paramdef>GLint <parameter>location</parameter></paramdef>
<paramdef>GLsizei <parameter>count</parameter></paramdef>
<paramdef>const GLint *<parameter>value</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>void <function>glProgramUniform3iv</function></funcdef>
<paramdef>GLuint <parameter>program</parameter></paramdef>
<paramdef>GLint <parameter>location</parameter></paramdef>
<paramdef>GLsizei <parameter>count</parameter></paramdef>
<paramdef>const GLint *<parameter>value</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>void <function>glProgramUniform4iv</function></funcdef>
<paramdef>GLuint <parameter>program</parameter></paramdef>
<paramdef>GLint <parameter>location</parameter></paramdef>
<paramdef>GLsizei <parameter>count</parameter></paramdef>
<paramdef>const GLint *<parameter>value</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>void <function>glProgramUniform1uiv</function></funcdef>
<paramdef>GLuint <parameter>program</parameter></paramdef>
<paramdef>GLint <parameter>location</parameter></paramdef>
<paramdef>GLsizei <parameter>count</parameter></paramdef>
<paramdef>const GLuint *<parameter>value</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>void <function>glProgramUniform2uiv</function></funcdef>
<paramdef>GLuint <parameter>program</parameter></paramdef>
<paramdef>GLint <parameter>location</parameter></paramdef>
<paramdef>GLsizei <parameter>count</parameter></paramdef>
<paramdef>const GLuint *<parameter>value</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>void <function>glProgramUniform3uiv</function></funcdef>
<paramdef>GLuint <parameter>program</parameter></paramdef>
<paramdef>GLint <parameter>location</parameter></paramdef>
<paramdef>GLsizei <parameter>count</parameter></paramdef>
<paramdef>const GLuint *<parameter>value</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>void <function>glProgramUniform4uiv</function></funcdef>
<paramdef>GLuint <parameter>program</parameter></paramdef>
<paramdef>GLint <parameter>location</parameter></paramdef>
<paramdef>GLsizei <parameter>count</parameter></paramdef>
<paramdef>const GLuint *<parameter>value</parameter></paramdef>
</funcprototype>
<!-- Matrix commands -->
<funcprototype>
<funcdef>void <function>glProgramUniformMatrix2fv</function></funcdef>
<paramdef>GLuint <parameter>program</parameter></paramdef>
<paramdef>GLint <parameter>location</parameter></paramdef>
<paramdef>GLsizei <parameter>count</parameter></paramdef>
<paramdef>GLboolean <parameter>transpose</parameter></paramdef>
<paramdef>const GLfloat *<parameter>value</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>void <function>glProgramUniformMatrix3fv</function></funcdef>
<paramdef>GLuint <parameter>program</parameter></paramdef>
<paramdef>GLint <parameter>location</parameter></paramdef>
<paramdef>GLsizei <parameter>count</parameter></paramdef>
<paramdef>GLboolean <parameter>transpose</parameter></paramdef>
<paramdef>const GLfloat *<parameter>value</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>void <function>glProgramUniformMatrix4fv</function></funcdef>
<paramdef>GLuint <parameter>program</parameter></paramdef>
<paramdef>GLint <parameter>location</parameter></paramdef>
<paramdef>GLsizei <parameter>count</parameter></paramdef>
<paramdef>GLboolean <parameter>transpose</parameter></paramdef>
<paramdef>const GLfloat *<parameter>value</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>void <function>glProgramUniformMatrix2x3fv</function></funcdef>
<paramdef>GLuint <parameter>program</parameter></paramdef>
<paramdef>GLint <parameter>location</parameter></paramdef>
<paramdef>GLsizei <parameter>count</parameter></paramdef>
<paramdef>GLboolean <parameter>transpose</parameter></paramdef>
<paramdef>const GLfloat *<parameter>value</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>void <function>glProgramUniformMatrix3x2fv</function></funcdef>
<paramdef>GLuint <parameter>program</parameter></paramdef>
<paramdef>GLint <parameter>location</parameter></paramdef>
<paramdef>GLsizei <parameter>count</parameter></paramdef>
<paramdef>GLboolean <parameter>transpose</parameter></paramdef>
<paramdef>const GLfloat *<parameter>value</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>void <function>glProgramUniformMatrix2x4fv</function></funcdef>
<paramdef>GLuint <parameter>program</parameter></paramdef>
<paramdef>GLint <parameter>location</parameter></paramdef>
<paramdef>GLsizei <parameter>count</parameter></paramdef>
<paramdef>GLboolean <parameter>transpose</parameter></paramdef>
<paramdef>const GLfloat *<parameter>value</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>void <function>glProgramUniformMatrix4x2fv</function></funcdef>
<paramdef>GLuint <parameter>program</parameter></paramdef>
<paramdef>GLint <parameter>location</parameter></paramdef>
<paramdef>GLsizei <parameter>count</parameter></paramdef>
<paramdef>GLboolean <parameter>transpose</parameter></paramdef>
<paramdef>const GLfloat *<parameter>value</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>void <function>glProgramUniformMatrix3x4fv</function></funcdef>
<paramdef>GLuint <parameter>program</parameter></paramdef>
<paramdef>GLint <parameter>location</parameter></paramdef>
<paramdef>GLsizei <parameter>count</parameter></paramdef>
<paramdef>GLboolean <parameter>transpose</parameter></paramdef>
<paramdef>const GLfloat *<parameter>value</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>void <function>glProgramUniformMatrix4x3fv</function></funcdef>
<paramdef>GLuint <parameter>program</parameter></paramdef>
<paramdef>GLint <parameter>location</parameter></paramdef>
<paramdef>GLsizei <parameter>count</parameter></paramdef>
<paramdef>GLboolean <parameter>transpose</parameter></paramdef>
<paramdef>const GLfloat *<parameter>value</parameter></paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1 xml:id="parameters"><title>Parameters</title>
<variablelist>
<varlistentry>
<term><parameter>program</parameter></term>
<listitem>
<para>Specifies the handle of the program containing the uniform
variable to be modified.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>location</parameter></term>
<listitem>
<para>Specifies the location of the uniform variable
to be modified.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>count</parameter></term>
<listitem>
<para>
For the vector commands
(<function>glProgramUniform*v</function>), specifies the
number of elements that are to be modified. This should be 1
if the targeted uniform variable is not an array, and 1 or
more if it is an array.
</para>
<para>
For the matrix commands
(<function>glProgramUniformMatrix*</function>), specifies
the number of matrices that are to be modified. This should
be 1 if the targeted uniform variable is not an array of
matrices, and 1 or more if it is an array of matrices.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>transpose</parameter></term>
<listitem>
<para>
For the matrix commands, specifies whether to transpose the
matrix as the values are loaded into the uniform variable.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<parameter>v0</parameter>,
<parameter>v1</parameter>,
<parameter>v2</parameter>,
<parameter>v3</parameter>
</term>
<listitem>
<para>
For the scalar commands, specifies the new values to be used
for the specified uniform variable.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>value</parameter></term>
<listitem>
<para>
For the vector and matrix commands, specifies a pointer to
an array of <parameter>count</parameter> values that will be
used to update the specified uniform variable.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1 xml:id="description"><title>Description</title>
<para><function>glProgramUniform</function> modifies the value of a
uniform variable or a uniform variable array. The location of
the uniform variable to be modified is specified by
<parameter>location</parameter>, which should be a value
returned by
<citerefentry><refentrytitle>glGetUniformLocation</refentrytitle></citerefentry>.
<function>glProgramUniform</function> operates on the program object
specified by <parameter>program</parameter>.</para>
<para>The commands <function>glProgramUniform{1|2|3|4}{f|i|ui}</function>
are used to change the value of the uniform variable specified
by <parameter>location</parameter> using the values passed as
arguments. The number specified in the command should match the
number of components in the data type of the specified uniform
variable (e.g., <function>1</function> for <code>float</code>, <code>int</code>, <code>unsigned int</code>, <code>bool</code>;
<function>2</function> for <code>vec2</code>, <code>ivec2</code>, <code>uvec2</code>, <code>bvec2</code>, etc.). The suffix
<function>f</function> indicates that floating-point values are
being passed; the suffix <function>i</function> indicates that
integer values are being passed; the suffix <function>ui</function> indicates that
unsigned integer values are being passed, and this type should also match
the data type of the specified uniform variable. The
<function>i</function> variants of this function should be used
to provide values for uniform variables defined as <code>int</code>, <code>ivec2</code>,
<code>ivec3</code>, <code>ivec4</code>, or arrays of these. The
<function>ui</function> variants of this function should be used
to provide values for uniform variables defined as <code>unsigned int</code>, <code>uvec2</code>,
<code>uvec3</code>, <code>uvec4</code>, or arrays of these. The <function>f</function>
variants should be used to provide values for uniform variables
of type <code>float</code>, <code>vec2</code>, <code>vec3</code>, <code>vec4</code>, or arrays of these. Either the
<function>i</function>, <function>ui</function> or <function>f</function> variants
may be used to provide values for uniform variables of type
<code>bool</code>, <code>bvec2</code>, <code>bvec3</code>, <code>bvec4</code>, or arrays of these. The uniform
variable will be set to <code>false</code> if the input value is 0 or 0.0f,
and it will be set to <code>true</code> otherwise.</para>
<para>All active uniform variables defined in a program object
are initialized to 0 when the program object is linked
successfully. They retain the values assigned to them by a call
to <function>glProgramUniform</function> until the next successful
link operation occurs on the program object, when they are once
again initialized to 0.</para>
<para>The commands <function>glProgramUniform{1|2|3|4}{f|i|ui}v</function>
can be used to modify a single uniform variable or a uniform
variable array. These commands pass a count and a pointer to the
values to be loaded into a uniform variable or a uniform
variable array. A count of 1 should be used if modifying the
value of a single uniform variable, and a count of 1 or greater
can be used to modify an entire array or part of an array. When
loading <emphasis>n</emphasis> elements starting at an arbitrary
position <emphasis>m</emphasis> in a uniform variable array,
elements <emphasis>m</emphasis> + <emphasis>n</emphasis> - 1 in
the array will be replaced with the new values. If
<parameter>m</parameter> + <parameter>n</parameter> - 1 is
larger than the size of the uniform variable array, values for
all array elements beyond the end of the array will be ignored.
The number specified in the name of the command indicates the
number of components for each element in
<parameter>value</parameter>, and it should match the number of
components in the data type of the specified uniform variable
(e.g., <function>1</function> for <code>float</code>, <code>int</code>, <code>bool</code>;
<function>2</function> for <code>vec2</code>, <code>ivec2</code>, <code>bvec2</code>, etc.). The data
type specified in the name of the command must match the data
type for the specified uniform variable as described previously
for <function>glProgramUniform{1|2|3|4}{f|i|ui}</function>.</para>
<para>For uniform variable arrays, each element of the array is
considered to be of the type indicated in the name of the
command (e.g., <function>glProgramUniform3f</function> or
<function>glProgramUniform3fv</function> can be used to load a uniform
variable array of type vec3). The number of elements of the
uniform variable array to be modified is specified by
<parameter>count</parameter></para>
<para>The commands
<function>glProgramUniformMatrix{2|3|4|2x3|3x2|2x4|4x2|3x4|4x3}fv</function>
are used to modify a matrix or an array of matrices. The numbers in the
command name are interpreted as the dimensionality of the matrix.
The number <function>2</function> indicates a 2 × 2 matrix
(i.e., 4 values), the number <function>3</function> indicates a
3 × 3 matrix (i.e., 9 values), and the number
<function>4</function> indicates a 4 × 4 matrix (i.e., 16
values). Non-square matrix dimensionality is explicit, with the first
number representing the number of columns and the second number
representing the number of rows. For example,
<function>2x4</function> indicates a 2 × 4 matrix with 2 columns
and 4 rows (i.e., 8 values).
If <parameter>transpose</parameter> is
<constant>GL_FALSE</constant>, each matrix is assumed to be
supplied in column major order. If
<parameter>transpose</parameter> is
<constant>GL_TRUE</constant>, each matrix is assumed to be
supplied in row major order. The <parameter>count</parameter>
argument indicates the number of matrices to be passed. A count
of 1 should be used if modifying the value of a single matrix,
and a count greater than 1 can be used to modify an array of
matrices.</para>
</refsect1>
<refsect1 xml:id="notes"><title>Notes</title>
<para><function>glProgramUniform1i</function> and
<function>glProgramUniform1iv</function> are the only two functions
that may be used to load uniform variables defined as sampler
types. Loading samplers with any other function will result in a
<constant>GL_INVALID_OPERATION</constant> error.</para>
<para>If <parameter>count</parameter> is greater than 1 and the
indicated uniform variable is not an array, a
<constant>GL_INVALID_OPERATION</constant> error is generated and the
specified uniform variable will remain unchanged.</para>
<para>Other than the preceding exceptions, if the type and size
of the uniform variable as defined in the shader do not match
the type and size specified in the name of the command used to
load its value, a <constant>GL_INVALID_OPERATION</constant> error will
be generated and the specified uniform variable will remain
unchanged.</para>
<para>If <parameter>location</parameter> is a value other than
-1 and it does not represent a valid uniform variable location
in within <parameter>program</parameter>, an error will be generated, and
no changes will be made to the uniform variable storage of
<parameter>program</parameter>. If <parameter>location</parameter> is
equal to -1, the data passed in will be silently ignored and the
specified uniform variable will not be changed.</para>
</refsect1>
<refsect1 xml:id="errors"><title>Errors</title>
<para><constant>GL_INVALID_OPERATION</constant> is generated if
<parameter>program</parameter> does not refer to a program object owned
by the GL.</para>
<para><constant>GL_INVALID_OPERATION</constant> is generated if the
size of the uniform variable declared in the shader does not
match the size indicated by the <function>glProgramUniform</function>
command.</para>
<para><constant>GL_INVALID_OPERATION</constant> is generated if one of
the signed or unsigned integer variants of this function is used to load a uniform
variable of type <code>float</code>, <code>vec2</code>, <code>vec3</code>, <code>vec4</code>, or an array of these,
or if one of the floating-point variants of this function is
used to load a uniform variable of type <code>int</code>, <code>ivec2</code>, <code>ivec3</code>,
<code>ivec4</code>, <code>unsigned int</code>, <code>uvec2</code>, <code>uvec3</code>,
<code>uvec4</code>, or an array of these.</para>
<para><constant>GL_INVALID_OPERATION</constant> is generated if one of
the signed integer variants of this function is used to load a uniform
variable of type <code>unsigned int</code>, <code>uvec2</code>, <code>uvec3</code>,
<code>uvec4</code>, or an array of these.</para>
<para><constant>GL_INVALID_OPERATION</constant> is generated if one of
the unsigned integer variants of this function is used to load a uniform
variable of type <code>int</code>, <code>ivec2</code>, <code>ivec3</code>,
<code>ivec4</code>, or an array of these.</para>
<para><constant>GL_INVALID_OPERATION</constant> is generated if
<parameter>location</parameter> is an invalid uniform location
for <parameter>program</parameter> and
<parameter>location</parameter> is not equal to -1.</para>
<para><constant>GL_INVALID_VALUE</constant> is generated if
<parameter>count</parameter> is less than 0.</para>
<para><constant>GL_INVALID_OPERATION</constant> is generated if
<parameter>count</parameter> is greater than 1 and the indicated
uniform variable is not an array variable.</para>
<para><constant>GL_INVALID_OPERATION</constant> is generated if a
sampler is loaded using a command other than
<function>glProgramUniform1i</function> and
<function>glProgramUniform1iv</function>.</para>
</refsect1>
<refsect1 xml:id="associatedgets"><title>Associated Gets</title>
<para><citerefentry><refentrytitle>glGetActiveUniform</refentrytitle></citerefentry>
with the handle of a program object and the index of an active uniform variable</para>
<para><citerefentry><refentrytitle>glGetUniform</refentrytitle></citerefentry>
with the handle of a program object and the location of a
uniform variable</para>
<para><citerefentry><refentrytitle>glGetUniformLocation</refentrytitle></citerefentry>
with the handle of a program object and the name of a uniform
variable</para>
</refsect1>
<refsect1 xml:id="versions"><title>Version Support</title>
<informaltable>
<tgroup cols="13" align="left">
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apifunchead.xml" xpointer="xpointer(/*/*)"/>
<tbody>
<row>
<entry><function>glProgramUniform1f</function></entry>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='41']/*)"/>
</row>
<row>
<entry><function>glProgramUniform1fv</function></entry>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='41']/*)"/>
</row>
<row>
<entry><function>glProgramUniform1i</function></entry>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='41']/*)"/>
</row>
<row>
<entry><function>glProgramUniform1iv</function></entry>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='41']/*)"/>
</row>
<row>
<entry><function>glProgramUniform1ui</function></entry>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='41']/*)"/>
</row>
<row>
<entry><function>glProgramUniform1uiv</function></entry>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='41']/*)"/>
</row>
<row>
<entry><function>glProgramUniform2f</function></entry>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='41']/*)"/>
</row>
<row>
<entry><function>glProgramUniform2fv</function></entry>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='41']/*)"/>
</row>
<row>
<entry><function>glProgramUniform2i</function></entry>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='41']/*)"/>
</row>
<row>
<entry><function>glProgramUniform2iv</function></entry>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='41']/*)"/>
</row>
<row>
<entry><function>glProgramUniform2ui</function></entry>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='41']/*)"/>
</row>
<row>
<entry><function>glProgramUniform2uiv</function></entry>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='41']/*)"/>
</row>
<row>
<entry><function>glProgramUniform3f</function></entry>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='41']/*)"/>
</row>
<row>
<entry><function>glProgramUniform3fv</function></entry>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='41']/*)"/>
</row>
<row>
<entry><function>glProgramUniform3i</function></entry>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='41']/*)"/>
</row>
<row>
<entry><function>glProgramUniform3iv</function></entry>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='41']/*)"/>
</row>
<row>
<entry><function>glProgramUniform3ui</function></entry>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='41']/*)"/>
</row>
<row>
<entry><function>glProgramUniform3uiv</function></entry>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='41']/*)"/>
</row>
<row>
<entry><function>glProgramUniform4f</function></entry>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='41']/*)"/>
</row>
<row>
<entry><function>glProgramUniform4fv</function></entry>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='41']/*)"/>
</row>
<row>
<entry><function>glProgramUniform4i</function></entry>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='41']/*)"/>
</row>
<row>
<entry><function>glProgramUniform4iv</function></entry>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='41']/*)"/>
</row>
<row>
<entry><function>glProgramUniform4ui</function></entry>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='41']/*)"/>
</row>
<row>
<entry><function>glProgramUniform4uiv</function></entry>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='41']/*)"/>
</row>
<row>
<entry><function>glProgramUniformMatrix2fv</function></entry>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='41']/*)"/>
</row>
<row>
<entry><function>glProgramUniformMatrix2x3fv</function></entry>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='41']/*)"/>
</row>
<row>
<entry><function>glProgramUniformMatrix2x4fv</function></entry>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='41']/*)"/>
</row>
<row>
<entry><function>glProgramUniformMatrix3fv</function></entry>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='41']/*)"/>
</row>
<row>
<entry><function>glProgramUniformMatrix3x2fv</function></entry>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='41']/*)"/>
</row>
<row>
<entry><function>glProgramUniformMatrix3x4fv</function></entry>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='41']/*)"/>
</row>
<row>
<entry><function>glProgramUniformMatrix4fv</function></entry>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='41']/*)"/>
</row>
<row>
<entry><function>glProgramUniformMatrix4x2fv</function></entry>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='41']/*)"/>
</row>
<row>
<entry><function>glProgramUniformMatrix4x3fv</function></entry>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='41']/*)"/>
</row>
</tbody>
</tgroup>
</informaltable>
</refsect1>
<refsect1 xml:id="seealso"><title>See Also</title>
<para><citerefentry><refentrytitle>glLinkProgram</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glUseProgram</refentrytitle></citerefentry></para>
</refsect1>
<refsect1 xml:id="Copyright"><title>Copyright</title>
<para>
Copyright <trademark class="copyright"/> 2003-2005 3Dlabs Inc. Ltd.
Copyright <trademark class="copyright"/> 2010-2014 Khronos Group.
This material may be distributed subject to the terms and conditions set forth in
the Open Publication License, v 1.0, 8 June 1999.
<link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="http://opencontent.org/openpub/">http://opencontent.org/openpub/</link>.
</para>
</refsect1>
</refentry>
|
