This file is indexed.

/usr/share/doc/opencl-1.2-html-doc/read_imagei2d.html is in opencl-1.2-html-doc 1.0~svn27110-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  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
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "xhtml1-transitional.dtd">
<!-- saved from url=(0013)about:internet -->
<?xml-stylesheet type="text/xsl" href="mathml.xsl"?><html xmlns="http://www.w3.org/1999/xhtml" xmlns:pref="http://www.w3.org/2002/Math/preference" xmlns:xlink="http://www.w3.org/1999/xlink" pref:renderer="mathplayer-dl">
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
    <style xmlns="" type="text/css">
    /* This style sets a margin around the entire page */
        html, body {
            margin: 10px;
        }

        p {
            font: normal 16px verdana, sans-serif;
            margin: 0;
            padding-bottom:12px;
        }

        h1 {
            font: bold 25px verdana, sans-serif;
            margin-top: 0;
            margin-bottom: 3px;
            padding-top: 0;
            padding-bottom: 0;
        }

        h2 {
            font: bold 19px verdana, sans-serif;
            margin-top: 28px;
            margin-bottom: 3px;
            padding-top: 0; 
            padding-bottom: 0;
        }

        h3 {
            font: bold 19px verdana, sans-serif !important;
            margin-top: 28px;
            margin-bottom: 3px;
            padding-top: 0;
            padding-bottom: 0;
        }

        li {
            font: normal 16px verdana, sans-serif;
            margin-top: 0;
            margin-bottom: 18px;
            padding-top: 0;
            padding-bottom: 0;
        }

        .pdparam {
            font: italic 16px verdana, sans-serif;
        }
		
		.term {
			font: italic 16px verdana, sans-serif;
			font-weight: normal;
		}	
		
		.type {
			font: normal 16px verdana, sans-serif !important;
		}			
		
		.parameter { 
			font-style: italic; 
			}

        a:link, a:visited {
            color: blue;
            text-decoration: none;
            font: normal 16px;
        }

        a:hover {
            background-color: #FFFF99;
            font: normal 16px;
        }

        div.funcsynopsis {
            text-align: left;
            background-color: #e6e6e6;
            font: normal 16px verdana, sans-serif;
			padding-top: 10px;
			padding-bottom: 10px;
        }

        div.funcsynopsis table {
            border-collapse: separate;
            font: normal 16px verdana, sans-serif;
        }

        div.funcsynopsis td {
            background-color: #e6e6e6;
            border: 0 solid #000;
            padding: 1px;
            font: normal 16px verdana, sans-serif;
        }

        div.refsect1 {
            font-family: verdana, sans-serif;
            font-size: 16px;
        }

        code.constant {
            font: normal 16px courier new, monospace !important;
        }
		
		span.errorname {
            font: normal 16px verdana, sans-serif !important;
        }

        code.function {
            font: bold 16px verdana, sans-serif !important;
        }
		
        b.fsfunc {
            font: bold 16px verdana, sans-serif !important;
        }
		
        code.varname {
            font: italic 16px verdana, sans-serif;
        }

        code.replaceable {
            font: italic 16px courier new, monospace;
        }

        code.funcdef {
            font: normal 16px verdana, sans-serif !important;
        }

        .citerefentry {
            font: normal 16px verdana, sans-serif !important;
        }

        .parameter {
            font-style: italic;
        }

        code.fsfunc {
            font: normal 16px verdana, sans-serif !important;
        }

        /* PARAMETER: This style controls spacing between the terms in Parameter section */
        dt {
            margin-top: 15px;
        }

        /* TABLES: These styles apply to all tables OTHER than the Synopsis and Example tables */
        div.refsect1 table {
            width: 100%;
			margin-top: 10px;
            background-color: #FFF;
			border-collapse: collapse;
			border-color: #000;
            border-width: 1px;
			font: normal 16px verdana, sans-serif;
        }
		
        div.refsect1 th {
			border-collapse: collapse;
			border-color: #000;
            border-width: 1px;
            font: bold 16px verdana, sans-serif;
        }
		
        div.refsect1 td {
            background-color: #FFF;
            padding: 5px;
            vertical-align: text-top;
			border-collapse: collapse;
			border-color: #000;
            border-width: 1px;
            font: normal 16px verdana, sans-serif;
        }
		
		  div.refsect1 p{
            font: normal 16px verdana, sans-serif;
            margin-top: 8px;
            margin-bottom: 8px;
            padding-top: 0;
            padding-bottom: 0;
        }
		

        /* EXAMPLE: These styles apply only to the Example section */
        div.refsect2 {
            font: normal 16px courier new, monospace !important;
        }

        div.refsect2 table {
            margin-top: 0;
            background-color: #e6e6e6;
            width: 100%;
            border: 0 solid #000;
            padding: 2px;
            font: normal 16px courier new, monospace !important;
        }

        div.refsect2 td {
            background-color: #e6e6e6;
            font: normal 16px courier new, monospace !important;
			white-space:pre;
        }

        /* COPYRIGHT: This style formats the text of the copyright statement at the bottom of the page */
        div.refsect3 {
            font: normal 11px verdana, sans-serif;
            margin-top: 50px;
            margin-bottom: 20px;
            padding-top: 0;
            padding-bottom: 0;
        }
					
</style>
    <title>read_imagei (2D)</title>
    <meta name="generator" content="DocBook XSL Stylesheets V1.78.1" />
    <meta name="keywords" content="read_imagei (2D)" />
  </head>
  <body>
    <div class="refentry">
      <a id="idp18528068"></a>
      <div class="titlepage"></div>
      <div xmlns="" class="refnamediv">
        <a xmlns="http://www.w3.org/1999/xhtml" id="read_image2d"></a>
        <h1>read_image{i|ui} (2D)</h1>
        <p>
            Do an element lookup in the 2D image object, returning unnormalized signed integer and unsigned integer values.
        </p>
      </div>
      <div class="refsynopsisdiv">
        <h2></h2>
        <div class="funcsynopsis">
          <table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0">
            <tr valign="bottom">
              <td>
                <code xmlns="http://www.w3.org/1999/xhtml" class="funcdef">
                    <a class="link" href="vectorDataTypes.html" target="pagedisplay">int4</a>
                    <strong class="fsfunc">
                        read_imagei
                    </strong>
                (</code>
                <td>
                    <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="otherDataTypes.html" target="pagedisplay">image2d_t</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">image</var>
                , </td>
              </td>
            </tr>
            <tr valign="top">
              <td> </td>
              <td>
                    <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="sampler_t.html" target="pagedisplay">sampler_t</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">sampler</var>
                , </td>
            </tr>
            <tr valign="top">
              <td> </td>
              <td>
                    <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="vectorDataTypes.html" target="pagedisplay">int2</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">coord</var>
                <code>)</code></td>
            </tr>
          </table>
        </div>
        <div class="funcsynopsis">
          <table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0">
            <tr valign="bottom">
              <td>
                <code xmlns="http://www.w3.org/1999/xhtml" class="funcdef">
                    <a class="link" href="vectorDataTypes.html" target="pagedisplay">int4</a>
                    <strong class="fsfunc">
                        read_imagei
                    </strong>
                (</code>
                <td>
                    <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="otherDataTypes.html" target="pagedisplay">image2d_t</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">image</var>
                , </td>
              </td>
            </tr>
            <tr valign="top">
              <td> </td>
              <td>
                    <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="sampler_t.html" target="pagedisplay">sampler_t</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">sampler</var>
                , </td>
            </tr>
            <tr valign="top">
              <td> </td>
              <td>
                    <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="vectorDataTypes.html" target="pagedisplay">float2</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">coord</var>
                <code>)</code></td>
            </tr>
          </table>
        </div>
        <div class="funcsynopsis">
          <table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0">
            <tr valign="bottom">
              <td>
                <code xmlns="http://www.w3.org/1999/xhtml" class="funcdef">
                    <a class="link" href="vectorDataTypes.html" target="pagedisplay">uint4</a>
                    <strong class="fsfunc">
                        read_imageui
                    </strong>
                (</code>
                <td>
                    <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="otherDataTypes.html" target="pagedisplay">image2d_t</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">image</var>
                , </td>
              </td>
            </tr>
            <tr valign="top">
              <td> </td>
              <td>
                    <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="sampler_t.html" target="pagedisplay">sampler_t</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">sampler</var>
                , </td>
            </tr>
            <tr valign="top">
              <td> </td>
              <td>
                    <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="vectorDataTypes.html" target="pagedisplay">int2</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">coord</var>
                <code>)</code></td>
            </tr>
          </table>
        </div>
        <div class="funcsynopsis">
          <table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0">
            <tr valign="bottom">
              <td>
                <code xmlns="http://www.w3.org/1999/xhtml" class="funcdef">
                    <a class="link" href="vectorDataTypes.html" target="pagedisplay">int4</a>
                    <strong class="fsfunc">
                        read_imagei
                    </strong>
                (</code>
                <td>
                    <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="otherDataTypes.html" target="pagedisplay">image2d_t</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">image</var>
                , </td>
              </td>
            </tr>
            <tr valign="top">
              <td> </td>
              <td>
                    <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="vectorDataTypes.html" target="pagedisplay">int2</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">coord</var>
                <code>)</code></td>
            </tr>
          </table>
        </div>
        <div class="funcsynopsis">
          <table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0">
            <tr valign="bottom">
              <td>
                <code xmlns="http://www.w3.org/1999/xhtml" class="funcdef">
                    <a class="link" href="vectorDataTypes.html" target="pagedisplay">uint4</a>
                    <strong class="fsfunc">
                        read_imageui
                    </strong>
                (</code>
                <td>
                    <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="otherDataTypes.html" target="pagedisplay">image2d_t</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">image</var>
                , </td>
              </td>
            </tr>
            <tr valign="top">
              <td> </td>
              <td>
                    <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="vectorDataTypes.html" target="pagedisplay">int2</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">coord</var>
                <code>)</code></td>
            </tr>
          </table>
        </div>
        <div class="funcsynopsis">
          <table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0">
            <tr valign="bottom">
              <td>
                <code xmlns="http://www.w3.org/1999/xhtml" class="funcdef">
                    <a class="link" href="vectorDataTypes.html" target="pagedisplay">int4</a>
                    <strong class="fsfunc">
                        read_imagei
                    </strong>
                (</code>
                <td>
                    <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="otherDataTypes.html" target="pagedisplay">image2d_array_t</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">image</var>
                , </td>
              </td>
            </tr>
            <tr valign="top">
              <td> </td>
              <td>
                    <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="vectorDataTypes.html" target="pagedisplay">int4</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">coord</var>
                <code>)</code></td>
            </tr>
          </table>
        </div>
        <div class="funcsynopsis">
          <table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0">
            <tr valign="bottom">
              <td>
                <code xmlns="http://www.w3.org/1999/xhtml" class="funcdef">
                    <a class="link" href="vectorDataTypes.html" target="pagedisplay">uint4</a>
                    <strong class="fsfunc">
                        read_imageui
                    </strong>
                (</code>
                <td>
                    <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="otherDataTypes.html" target="pagedisplay">image2d_array_t</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">image</var>
                , </td>
              </td>
            </tr>
            <tr valign="top">
              <td> </td>
              <td>
                    <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="vectorDataTypes.html" target="pagedisplay">int4</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">coord</var>
                <code>)</code></td>
            </tr>
          </table>
        </div>
        <div class="funcsynopsis">
          <table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0">
            <tr valign="bottom">
              <td>
                <code xmlns="http://www.w3.org/1999/xhtml" class="funcdef">
                    <a class="link" href="vectorDataTypes.html" target="pagedisplay">int4</a>
                    <strong class="fsfunc">
                        read_imagei
                    </strong>
                (</code>
                <td>
                    <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="otherDataTypes.html" target="pagedisplay">image2d_array_t</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">image</var>
                , </td>
              </td>
            </tr>
            <tr valign="top">
              <td> </td>
              <td>
                    <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="sampler_t.html" target="pagedisplay">sampler_t</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">sampler</var>
                , </td>
            </tr>
            <tr valign="top">
              <td> </td>
              <td>
                    <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="vectorDataTypes.html" target="pagedisplay">int4</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">coord</var>
                <code>)</code></td>
            </tr>
          </table>
        </div>
        <div class="funcsynopsis">
          <table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0">
            <tr valign="bottom">
              <td>
                <code xmlns="http://www.w3.org/1999/xhtml" class="funcdef">
                    <a class="link" href="vectorDataTypes.html" target="pagedisplay">int4</a>
                    <strong class="fsfunc">
                        read_imagei
                    </strong>
                (</code>
                <td>
                    <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="otherDataTypes.html" target="pagedisplay">image2d_array_t</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">image</var>
                , </td>
              </td>
            </tr>
            <tr valign="top">
              <td> </td>
              <td>
                    <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="sampler_t.html" target="pagedisplay">sampler_t</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">sampler</var>
                , </td>
            </tr>
            <tr valign="top">
              <td> </td>
              <td>
                    <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="vectorDataTypes.html" target="pagedisplay">float4</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">coord</var>
                <code>)</code></td>
            </tr>
          </table>
        </div>
        <div class="funcsynopsis">
          <table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0">
            <tr valign="bottom">
              <td>
                <code xmlns="http://www.w3.org/1999/xhtml" class="funcdef">
                    <a class="link" href="vectorDataTypes.html" target="pagedisplay">int4</a>
                    <strong class="fsfunc">
                        read_imageui
                    </strong>
                (</code>
                <td>
                    <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="otherDataTypes.html" target="pagedisplay">image2d_array_t</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">image</var>
                , </td>
              </td>
            </tr>
            <tr valign="top">
              <td> </td>
              <td>
                    <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="sampler_t.html" target="pagedisplay">sampler_t</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">sampler</var>
                , </td>
            </tr>
            <tr valign="top">
              <td> </td>
              <td>
                    <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="vectorDataTypes.html" target="pagedisplay">int4</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">coord</var>
                <code>)</code></td>
            </tr>
          </table>
        </div>
        <div class="funcsynopsis">
          <table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0">
            <tr valign="bottom">
              <td>
                <code xmlns="http://www.w3.org/1999/xhtml" class="funcdef">
                    <a class="link" href="vectorDataTypes.html" target="pagedisplay">int4</a>
                    <strong class="fsfunc">
                        read_imageui
                    </strong>
                (</code>
                <td>
                    <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="otherDataTypes.html" target="pagedisplay">image2d_array_t</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">image</var>
                , </td>
              </td>
            </tr>
            <tr valign="top">
              <td> </td>
              <td>
                    <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="sampler_t.html" target="pagedisplay">sampler_t</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">sampler</var>
                , </td>
            </tr>
            <tr valign="top">
              <td> </td>
              <td>
                    <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="vectorDataTypes.html" target="pagedisplay">float4</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">coord</var>
                <code>)</code></td>
            </tr>
          </table>
        </div>
        <div class="funcsynopsis">
          <table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0">
            <tr valign="bottom">
              <td>
                <code xmlns="http://www.w3.org/1999/xhtml" class="funcdef">
                    <a class="link" href="vectorDataTypes.html" target="pagedisplay">uint4</a>
                    <strong class="fsfunc">
                        read_imageui
                    </strong>
                (</code>
                <td>
                    <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="otherDataTypes.html" target="pagedisplay">image2d_array_t</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">image</var>
                , </td>
              </td>
            </tr>
            <tr valign="top">
              <td> </td>
              <td>
                    <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="sampler_t.html" target="pagedisplay">sampler_t</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">sampler</var>
                , </td>
            </tr>
            <tr valign="top">
              <td> </td>
              <td>
                    <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="vectorDataTypes.html" target="pagedisplay">int4</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">coord</var>
                <code>)</code></td>
            </tr>
          </table>
        </div>
        <div class="funcsynopsis">
          <table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0">
            <tr valign="bottom">
              <td>
                <code xmlns="http://www.w3.org/1999/xhtml" class="funcdef">
                    <a class="link" href="vectorDataTypes.html" target="pagedisplay">uint4</a>
                    <strong class="fsfunc">
                        read_imageui
                    </strong>
                (</code>
                <td>
                    <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="otherDataTypes.html" target="pagedisplay">image2d_array_t</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">image</var>
                , </td>
              </td>
            </tr>
            <tr valign="top">
              <td> </td>
              <td>
                    <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="sampler_t.html" target="pagedisplay">sampler_t</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">sampler</var>
                , </td>
            </tr>
            <tr valign="top">
              <td> </td>
              <td>
                    <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="vectorDataTypes.html" target="pagedisplay">float4</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">coord</var>
                <code>)</code></td>
            </tr>
          </table>
        </div>
      </div>
      <div class="refsect1">
        <a id="description"></a>
        <h2>Description</h2>
        <p>
          For the forms that take an <span class="type">image2d_t</span> object, use the coordinate
          <span class="emphasis"><em>(coord.x, coord.y)</em></span> to do an element lookup in the 2D image object
          specified by <code class="varname">image</code>.
        </p>
        <p>
          For the forms that take an <span class="type">image2d_array_t</span> object, use
          <span class="emphasis"><em>coord.xy</em></span> to do an element lookup in the 2D image identified by
          <span class="emphasis"><em>coord.z</em></span> in the 2D image array specified by <code class="varname">image</code>.
        </p>
        <p>
          The samplerless read image functions behave exactly as the corresponding read
          image functions that take integer coordinates and a sampler with filter mode
          set to <code class="constant">CLK_FILTER_NEAREST</code>, normalized coordinates set
          to <code class="constant">CLK_NORMALIZED_COORDS_FALSE</code> and addressing mode to
          <code class="constant">CLK_ADDRESS_NONE</code>.
        </p>
        <p>
          <code class="function">read_imagei</code> and <code class="function">read_imageui</code> return
          unnormalized signed integer and unsigned integer values respectively. Each channel
          will be stored in a 32-bit integer.
        </p>
        <p>
          <code class="function">read_imagei</code> can only be used with image objects created with
          <code class="varname">image_channel_data_type</code> set to one of the following values:
          <code class="constant">CL_SIGNED_INT8</code>, <code class="constant">CL_SIGNED_INT16</code>, or
          <code class="constant">CL_SIGNED_INT32</code>. If the <code class="varname">image_channel_data_type</code>
          is not one of the above values, the values returned by <code class="function">read_imagei</code>
          are undefined.
        </p>
        <p>
          <code class="function">read_imageui</code> can only be used with image objects created with
          <code class="varname">image_channel_data_type</code> set to one of the following values:
          <code class="constant">CL_UNSIGNED_INT8</code>, <code class="constant">CL_UNSIGNED_INT16</code>, and
          <code class="constant">CL_UNSIGNED_INT32</code>. If the <code class="varname">image_channel_data_type</code>
          is not one of the above values, the values returned by <code class="function">read_imageui</code>
          are undefined.
        </p>
        <p>
          The <code class="function">read_imagei</code> and <code class="function">read_imageui</code> calls
          support a nearest filter only. The <code class="varname">filter_mode</code> specified in
          <code class="varname">sampler</code> must be set to <code class="constant">CLK_FILTER_NEAREST</code>;
          otherwise the values returned are undefined.
        </p>
        <p>
          Furthermore, the <code class="function">read_imagei</code> and <code class="function">read_imageui</code>
          calls that take integer coordinates must use a sampler with normalized coordinates
          set to <code class="constant">CLK_NORMALIZED_COORDS_FALSE</code> and addressing mode set to
          <code class="constant">CLK_ADDRESS_CLAMP_TO_EDGE</code>, <code class="constant">CLK_ADDRESS_CLAMP</code>
          or <code class="constant">CLK_ADDRESS_NONE</code>; otherwise the values returned are undefined.
        </p>
      </div>
      <div class="refsect1">
        <a id="notes"></a>
        <h2>Notes</h2>
        <p>
     The built-in functions defined in this section
    can only be used with image memory objects.  An image memory object can be accessed by
    specific function calls that read from and/or write to specific locations in the image.
  </p>
        <p>
    Image memory objects that are being read by a kernel should be declared with the <a class="citerefentry" href="accessQualifiers.html"><span class="citerefentry"><span class="refentrytitle">__read_only</span></span></a>
    qualifier. <code class="function">write_image</code> calls to image memory objects declared with the
    <a class="citerefentry" href="accessQualifiers.html"><span class="citerefentry"><span class="refentrytitle">__read_only</span></span></a>
    qualifier will generate a compilation error. Image memory objects that
    are being written to by a kernel should be declared with the <a class="citerefentry" href="accessQualifiers.html"><span class="citerefentry"><span class="refentrytitle">__write_only</span></span></a> qualifier.
    <code class="function">read_image</code> calls to image memory objects declared with the <a class="citerefentry" href="accessQualifiers.html"><span class="citerefentry"><span class="refentrytitle">__write_only</span></span></a>
    qualifier will generate a compilation error. <code class="function">read_image</code> and
    <code class="function">write_image</code> calls to the same image memory object in a kernel are
    not supported.
  </p>
        <p>
    The <code class="function">read_image</code> calls returns a four component floating-point, integer or
    unsigned integer color value. The color values returned by <code class="function">read_image</code>
    are identified as <code class="code">x, y, z, w</code> where <code class="code">x</code> refers to the red component,
    <code class="code">y</code> refers to the green component, <code class="code">z</code> refers to the blue component
    and <code class="code">w</code> refers to the alpha component.
  </p>
        <p>
     The following table describes the mapping
    of the number of channels of an image element to the appropriate components in the
    <span class="type">float4</span>, <span class="type">int4</span> or <span class="type">uint4</span> vector data type for
    the color values returned by <code class="function">read_image{f|i|ui}</code> or supplied
    to <code class="function">write_image{f|i|ui}</code>. The unmapped components will be set
    to <code class="constant">0.0</code> for red, green and blue channels and will be set to
    <code class="constant">1.0</code> for the alpha channel.
  </p>
        <p>
    </p>
        <div class="informaltable">
          <table border="1">
            <colgroup>
              <col align="center" class="col1" />
              <col align="center" class="col2" />
            </colgroup>
            <thead>
              <tr>
                <th align="center">Channel Order</th>
                <th align="center"><span class="type">float4</span>, <span class="type">int4</span> or <span class="type">uint4</span> components of channel data</th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td align="center"><code class="constant">CL_R</code>, <code class="constant">CL_Rx</code></td>
                <td align="center">
                  <code class="constant">(r, 0.0, 0.0, 1.0)</code>
                </td>
              </tr>
              <tr>
                <td align="center">
                  <code class="constant">CL_A</code>
                </td>
                <td align="center">
                  <code class="constant">(0.0, 0.0, 0.0, a)</code>
                </td>
              </tr>
              <tr>
                <td align="center"><code class="constant">CL_RG</code>, <code class="constant">CL_RGx</code></td>
                <td align="center">
                  <code class="constant">(r, g, 0.0, 1.0)</code>
                </td>
              </tr>
              <tr>
                <td align="center">
                  <code class="constant">CL_RA</code>
                </td>
                <td align="center">
                  <code class="constant">(r, 0.0, 0.0, a)</code>
                </td>
              </tr>
              <tr>
                <td align="center"><code class="constant">CL_RGB</code>, <code class="constant">CL_RGBx</code></td>
                <td align="center">
                  <code class="constant">(r, g, b, 1.0)</code>
                </td>
              </tr>
              <tr>
                <td align="center">
                  <code class="constant">CL_RGBA, CL_BGRA, CL_ARGB</code>
                </td>
                <td align="center">
                  <code class="constant">(r, g, b, a)</code>
                </td>
              </tr>
              <tr>
                <td align="center">
                  <code class="constant">CL_INTENSITY</code>
                </td>
                <td align="center">
                  <code class="constant">(I, I, I, I)</code>
                </td>
              </tr>
              <tr>
                <td align="center">
                  <code class="constant">CL_LUMINANCE</code>
                </td>
                <td align="center">
                  <code class="constant">(L, L, L, 1.0)</code>
                </td>
              </tr>
            </tbody>
          </table>
        </div>
        <p>
  </p>
        <p>
    A kernel that uses a sampler with the <code class="constant">CL_ADDRESS_CLAMP</code> addressing
    mode with multiple images may result in additional samplers being used internally
    by an implementation. If the same sampler is used with multiple images called via
    <code class="function">read_image{f|i|ui}</code>, then it is possible that an implementation may
    need to allocate an additional sampler to handle the different border color values that
    may be needed depending on the image formats being used. These implementation allocated
    samplers will count against the maximum sampler values supported by the device and given by
    <code class="constant">CL_DEVICE_MAX_SAMPLERS</code>. Enqueuing a kernel that requires more samplers
    than the implementation can support will result in a <code class="constant">CL_OUT_OF_RESOURCES</code>
    error being returned.
  </p>
      </div>
      <div class="refsect1">
        <a id="specification"></a>
        <h2>Specification</h2>
        <p>
            <img src="pdficon_small1.gif" />

            <a href="http://www.khronos.org/registry/cl/specs/opencl-1.2.pdf#page=292" target="OpenCL Spec">OpenCL Specification</a>
        </p>
      </div>
      <div class="refsect1">
        <a id="seealso"></a>
        <h2>Also see</h2>
        <p>
            <a class="citerefentry" href="imageFunctions.html"><span class="citerefentry"><span class="refentrytitle">Image Functions</span></span></a>
        </p>
      </div>
      <div xmlns="" class="refsect3" lang="en" xml:lang="en"><a xmlns="http://www.w3.org/1999/xhtml" id="Copyright"></a><h4 xmlns="http://www.w3.org/1999/xhtml"></h4><img xmlns="http://www.w3.org/1999/xhtml" src="KhronosLogo.jpg" /><p xmlns="http://www.w3.org/1999/xhtml"></p>Copyright © 2007-2011 The Khronos Group Inc. 
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and/or associated documentation files (the
"Materials"), to deal in the Materials without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Materials, and to
permit persons to whom the Materials are furnished to do so, subject to
the condition that this copyright notice and permission notice shall be included
in all copies or substantial portions of the Materials. 
</div>
    </div>
  </body>
</html>