This file is indexed.

/usr/share/gtk-doc/html/gdk-pixbuf/gdk-pixbuf-The-GdkPixbuf-Structure.html is in libgdk-pixbuf2.0-doc 2.26.1-1.

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
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>The GdkPixbuf Structure</title>
<meta name="generator" content="DocBook XSL Stylesheets V1.76.1">
<link rel="home" href="index.html" title="GDK-PixBuf Reference Manual">
<link rel="up" href="rn01.html" title="API Reference">
<link rel="prev" href="gdk-pixbuf-Versioning.html" title="Initialization and Versions">
<link rel="next" href="gdk-pixbuf-Reference-Counting-and-Memory-Mangement.html" title="Reference Counting and Memory Mangement">
<meta name="generator" content="GTK-Doc V1.18 (XML mode)">
<link rel="stylesheet" href="style.css" type="text/css">
</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
<table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="2">
<tr valign="middle">
<td><a accesskey="p" href="gdk-pixbuf-Versioning.html"><img src="left.png" width="24" height="24" border="0" alt="Prev"></a></td>
<td><a accesskey="u" href="rn01.html"><img src="up.png" width="24" height="24" border="0" alt="Up"></a></td>
<td><a accesskey="h" href="index.html"><img src="home.png" width="24" height="24" border="0" alt="Home"></a></td>
<th width="100%" align="center">GDK-PixBuf Reference Manual</th>
<td><a accesskey="n" href="gdk-pixbuf-Reference-Counting-and-Memory-Mangement.html"><img src="right.png" width="24" height="24" border="0" alt="Next"></a></td>
</tr>
<tr><td colspan="5" class="shortcuts">
<a href="#gdk-pixbuf-The-GdkPixbuf-Structure.synopsis" class="shortcut">Top</a>
                   | 
                  <a href="#gdk-pixbuf-The-GdkPixbuf-Structure.description" class="shortcut">Description</a>
                   | 
                  <a href="#gdk-pixbuf-The-GdkPixbuf-Structure.object-hierarchy" class="shortcut">Object Hierarchy</a>
                   | 
                  <a href="#gdk-pixbuf-The-GdkPixbuf-Structure.implemented-interfaces" class="shortcut">Implemented Interfaces</a>
                   | 
                  <a href="#gdk-pixbuf-The-GdkPixbuf-Structure.properties" class="shortcut">Properties</a>
</td></tr>
</table>
<div class="refentry">
<a name="gdk-pixbuf-The-GdkPixbuf-Structure"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="gdk-pixbuf-The-GdkPixbuf-Structure.top_of_page"></a>The GdkPixbuf Structure</span></h2>
<p>The GdkPixbuf Structure — Information that describes an image.</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<a name="gdk-pixbuf-The-GdkPixbuf-Structure.synopsis"></a><h2>Synopsis</h2>
<a name="GdkPixbuf"></a><pre class="synopsis">
#include &lt;gdk-pixbuf/gdk-pixbuf.h&gt;

enum                <a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkPixbufError" title="enum GdkPixbufError">GdkPixbufError</a>;
#define             <a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#GDK-PIXBUF-ERROR:CAPS" title="GDK_PIXBUF_ERROR">GDK_PIXBUF_ERROR</a>
enum                <a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkColorspace" title="enum GdkColorspace">GdkColorspace</a>;
enum                <a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkPixbufAlphaMode" title="enum GdkPixbufAlphaMode">GdkPixbufAlphaMode</a>;
                    <a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkPixbuf-struct" title="GdkPixbuf">GdkPixbuf</a>;
<a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkColorspace" title="enum GdkColorspace"><span class="returnvalue">GdkColorspace</span></a>       <a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#gdk-pixbuf-get-colorspace" title="gdk_pixbuf_get_colorspace ()">gdk_pixbuf_get_colorspace</a>           (<em class="parameter"><code>const <a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkPixbuf"><span class="type">GdkPixbuf</span></a> *pixbuf</code></em>);
<span class="returnvalue">int</span>                 <a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#gdk-pixbuf-get-n-channels" title="gdk_pixbuf_get_n_channels ()">gdk_pixbuf_get_n_channels</a>           (<em class="parameter"><code>const <a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkPixbuf"><span class="type">GdkPixbuf</span></a> *pixbuf</code></em>);
<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>            <a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#gdk-pixbuf-get-has-alpha" title="gdk_pixbuf_get_has_alpha ()">gdk_pixbuf_get_has_alpha</a>            (<em class="parameter"><code>const <a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkPixbuf"><span class="type">GdkPixbuf</span></a> *pixbuf</code></em>);
<span class="returnvalue">int</span>                 <a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#gdk-pixbuf-get-bits-per-sample" title="gdk_pixbuf_get_bits_per_sample ()">gdk_pixbuf_get_bits_per_sample</a>      (<em class="parameter"><code>const <a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkPixbuf"><span class="type">GdkPixbuf</span></a> *pixbuf</code></em>);
<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guchar"><span class="returnvalue">guchar</span></a> *            <a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#gdk-pixbuf-get-pixels" title="gdk_pixbuf_get_pixels ()">gdk_pixbuf_get_pixels</a>               (<em class="parameter"><code>const <a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkPixbuf"><span class="type">GdkPixbuf</span></a> *pixbuf</code></em>);
<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guchar"><span class="returnvalue">guchar</span></a> *            <a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#gdk-pixbuf-get-pixels-with-length" title="gdk_pixbuf_get_pixels_with_length ()">gdk_pixbuf_get_pixels_with_length</a>   (<em class="parameter"><code>const <a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkPixbuf"><span class="type">GdkPixbuf</span></a> *pixbuf</code></em>,
                                                         <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> *length</code></em>);
<span class="returnvalue">int</span>                 <a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#gdk-pixbuf-get-width" title="gdk_pixbuf_get_width ()">gdk_pixbuf_get_width</a>                (<em class="parameter"><code>const <a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkPixbuf"><span class="type">GdkPixbuf</span></a> *pixbuf</code></em>);
<span class="returnvalue">int</span>                 <a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#gdk-pixbuf-get-height" title="gdk_pixbuf_get_height ()">gdk_pixbuf_get_height</a>               (<em class="parameter"><code>const <a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkPixbuf"><span class="type">GdkPixbuf</span></a> *pixbuf</code></em>);
<span class="returnvalue">int</span>                 <a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#gdk-pixbuf-get-rowstride" title="gdk_pixbuf_get_rowstride ()">gdk_pixbuf_get_rowstride</a>            (<em class="parameter"><code>const <a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkPixbuf"><span class="type">GdkPixbuf</span></a> *pixbuf</code></em>);
<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gsize"><span class="returnvalue">gsize</span></a>               <a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#gdk-pixbuf-get-byte-length" title="gdk_pixbuf_get_byte_length ()">gdk_pixbuf_get_byte_length</a>          (<em class="parameter"><code>const <a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkPixbuf"><span class="type">GdkPixbuf</span></a> *pixbuf</code></em>);
const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *       <a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#gdk-pixbuf-get-option" title="gdk_pixbuf_get_option ()">gdk_pixbuf_get_option</a>               (<em class="parameter"><code><a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkPixbuf"><span class="type">GdkPixbuf</span></a> *pixbuf</code></em>,
                                                         <em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *key</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="gdk-pixbuf-The-GdkPixbuf-Structure.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="synopsis">
  <a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject">GObject</a>
   +----GdkPixbuf
</pre>
</div>
<div class="refsect1">
<a name="gdk-pixbuf-The-GdkPixbuf-Structure.implemented-interfaces"></a><h2>Implemented Interfaces</h2>
<p>
GdkPixbuf implements
 <a href="http://library.gnome.org/devel/gio/unstable/GIcon.html">GIcon</a>.</p>
</div>
<div class="refsect1">
<a name="gdk-pixbuf-The-GdkPixbuf-Structure.properties"></a><h2>Properties</h2>
<pre class="synopsis">
  "<a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkPixbuf--bits-per-sample" title='The "bits-per-sample" property'>bits-per-sample</a>"          <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a>                  : Read / Write / Construct Only
  "<a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkPixbuf--colorspace" title='The "colorspace" property'>colorspace</a>"               <a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkColorspace" title="enum GdkColorspace"><span class="type">GdkColorspace</span></a>         : Read / Write / Construct Only
  "<a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkPixbuf--has-alpha" title='The "has-alpha" property'>has-alpha</a>"                <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a>              : Read / Write / Construct Only
  "<a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkPixbuf--height" title='The "height" property'>height</a>"                   <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a>                  : Read / Write / Construct Only
  "<a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkPixbuf--n-channels" title='The "n-channels" property'>n-channels</a>"               <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a>                  : Read / Write / Construct Only
  "<a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkPixbuf--pixels" title='The "pixels" property'>pixels</a>"                   <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a>              : Read / Write / Construct Only
  "<a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkPixbuf--rowstride" title='The "rowstride" property'>rowstride</a>"                <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a>                  : Read / Write / Construct Only
  "<a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkPixbuf--width" title='The "width" property'>width</a>"                    <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a>                  : Read / Write / Construct Only
</pre>
</div>
<div class="refsect1">
<a name="gdk-pixbuf-The-GdkPixbuf-Structure.description"></a><h2>Description</h2>
<p>
The <a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkPixbuf"><span class="type">GdkPixbuf</span></a> structure contains
information that describes an image in memory.
</p>
<p>
</p>
<div class="section">
<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="image-data"></a>Image Data</h2></div></div></div>
<p>
Image data in a pixbuf is stored in memory in uncompressed,
packed format.  Rows in the image are stored top to bottom, and
in each row pixels are stored from left to right.  There may be
padding at the end of a row.  The "rowstride" value of a pixbuf,
as returned by <a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#gdk-pixbuf-get-rowstride" title="gdk_pixbuf_get_rowstride ()"><code class="function">gdk_pixbuf_get_rowstride()</code></a>, indicates the number
of bytes between rows.
</p>
<p>
</p>
<div class="example">
<a name="put-pixel"></a><p class="title"><b>Example 1. put_pixel() example</b></p>
<div class="example-contents">
<p>
</p>
<p>
The following code illustrates a simple put_pixel()
function for RGB pixbufs with 8 bits per channel with an alpha
channel.  It is not included in the gdk-pixbuf library for
performance reasons; rather than making several function calls
for each pixel, your own code can take shortcuts.
</p>
<p>
</p>
<pre class="programlisting">
static void
put_pixel (GdkPixbuf *pixbuf, int x, int y, guchar red, guchar green, guchar blue, guchar alpha)
{
  int width, height, rowstride, n_channels;
  guchar *pixels, *p;

  n_channels = gdk_pixbuf_get_n_channels (pixbuf);

  g_assert (gdk_pixbuf_get_colorspace (pixbuf) == GDK_COLORSPACE_RGB);
  g_assert (gdk_pixbuf_get_bits_per_sample (pixbuf) == 8);
  g_assert (gdk_pixbuf_get_has_alpha (pixbuf));
  g_assert (n_channels == 4);

  width = gdk_pixbuf_get_width (pixbuf);
  height = gdk_pixbuf_get_height (pixbuf);

  g_assert (x &gt;= 0 &amp;&amp; x &lt; width);
  g_assert (y &gt;= 0 &amp;&amp; y &lt; height);

  rowstride = gdk_pixbuf_get_rowstride (pixbuf);
  pixels = gdk_pixbuf_get_pixels (pixbuf);

  p = pixels + y * rowstride + x * n_channels;
  p[0] = red;
  p[1] = green;
  p[2] = blue;
  p[3] = alpha;
}
</pre>
<p>
</p>
<p>
This function will not work for pixbufs with images that are
other than 8 bits per sample or channel, but it will work for
most of the pixbufs that GTK+ uses.
</p>
</div>
</div>
<p><br class="example-break">
</p>
<p>
</p>
<div class="note" style="margin-left: 0.5in; margin-right: 0.5in;">
<h3 class="title">Note</h3>
If you are doing <code class="function">memcpy()</code> of raw pixbuf data, note that the
last row in the pixbuf may not be as wide as the full
rowstride, but rather just as wide as the pixel data needs to
be.  That is, it is unsafe to do <code class="literal">memcpy (dest,
pixels, rowstride * height)</code> to copy a whole pixbuf.
Use <a class="link" href="gdk-pixbuf-Image-Data-in-Memory.html#gdk-pixbuf-copy" title="gdk_pixbuf_copy ()"><code class="function">gdk_pixbuf_copy()</code></a> instead, or compute the width in bytes
of the last row as <code class="literal">width * ((n_channels *
bits_per_sample + 7) / 8)</code>.
</div>
<p>
</p>
</div>
<p>
</p>
</div>
<div class="refsect1">
<a name="gdk-pixbuf-The-GdkPixbuf-Structure.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="GdkPixbufError"></a><h3>enum GdkPixbufError</h3>
<pre class="programlisting">typedef enum {
        /* image data hosed */
        GDK_PIXBUF_ERROR_CORRUPT_IMAGE,
        /* no mem to load image */
        GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY,
        /* bad option passed to save routine */
        GDK_PIXBUF_ERROR_BAD_OPTION,
        /* unsupported image type (sort of an ENOSYS) */
        GDK_PIXBUF_ERROR_UNKNOWN_TYPE,
        /* unsupported operation (load, save) for image type */
        GDK_PIXBUF_ERROR_UNSUPPORTED_OPERATION,
        GDK_PIXBUF_ERROR_FAILED
} GdkPixbufError;
</pre>
<p>
An error code in the <a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#GDK-PIXBUF-ERROR:CAPS" title="GDK_PIXBUF_ERROR"><span class="type">GDK_PIXBUF_ERROR</span></a> domain. Many &amp;gdk-pixbuf;
operations can cause errors in this domain, or in the <a href="http://library.gnome.org/devel/glib/unstable/glib-File-Utilities.html#G-FILE-ERROR:CAPS"><span class="type">G_FILE_ERROR</span></a>
domain.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><a name="GDK-PIXBUF-ERROR-CORRUPT-IMAGE:CAPS"></a><span class="term"><code class="literal">GDK_PIXBUF_ERROR_CORRUPT_IMAGE</code></span></p></td>
<td>An image file was broken somehow.
</td>
</tr>
<tr>
<td><p><a name="GDK-PIXBUF-ERROR-INSUFFICIENT-MEMORY:CAPS"></a><span class="term"><code class="literal">GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY</code></span></p></td>
<td>Not enough memory.
</td>
</tr>
<tr>
<td><p><a name="GDK-PIXBUF-ERROR-BAD-OPTION:CAPS"></a><span class="term"><code class="literal">GDK_PIXBUF_ERROR_BAD_OPTION</code></span></p></td>
<td>A bad option was passed to a pixbuf save module.
</td>
</tr>
<tr>
<td><p><a name="GDK-PIXBUF-ERROR-UNKNOWN-TYPE:CAPS"></a><span class="term"><code class="literal">GDK_PIXBUF_ERROR_UNKNOWN_TYPE</code></span></p></td>
<td>Unknown image type.
</td>
</tr>
<tr>
<td><p><a name="GDK-PIXBUF-ERROR-UNSUPPORTED-OPERATION:CAPS"></a><span class="term"><code class="literal">GDK_PIXBUF_ERROR_UNSUPPORTED_OPERATION</code></span></p></td>
<td>Don't know how to perform the
 given operation on the type of image at hand.
</td>
</tr>
<tr>
<td><p><a name="GDK-PIXBUF-ERROR-FAILED:CAPS"></a><span class="term"><code class="literal">GDK_PIXBUF_ERROR_FAILED</code></span></p></td>
<td>Generic failure code, something went wrong.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GDK-PIXBUF-ERROR:CAPS"></a><h3>GDK_PIXBUF_ERROR</h3>
<pre class="programlisting">#define GDK_PIXBUF_ERROR gdk_pixbuf_error_quark ()
</pre>
<p>
Error domain used for pixbuf operations. Indicates that the error code
will be in the <a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkPixbufError" title="enum GdkPixbufError"><span class="type">GdkPixbufError</span></a> enumeration. See <a href="http://library.gnome.org/devel/glib/unstable/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> for
information on error domains and error codes.
</p>
</div>
<hr>
<div class="refsect2">
<a name="GdkColorspace"></a><h3>enum GdkColorspace</h3>
<pre class="programlisting">typedef enum {
	GDK_COLORSPACE_RGB
} GdkColorspace;
</pre>
<p>
This enumeration defines the color spaces that are supported by
the &amp;gdk-pixbuf; library.  Currently only RGB is supported.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><a name="GDK-COLORSPACE-RGB:CAPS"></a><span class="term"><code class="literal">GDK_COLORSPACE_RGB</code></span></p></td>
<td>Indicates a red/green/blue additive color space.
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GdkPixbufAlphaMode"></a><h3>enum GdkPixbufAlphaMode</h3>
<pre class="programlisting">typedef enum {
        GDK_PIXBUF_ALPHA_BILEVEL,
        GDK_PIXBUF_ALPHA_FULL
} GdkPixbufAlphaMode;
</pre>
<p>
These values can be passed to
<code class="function">gdk_pixbuf_render_to_drawable_alpha()</code> to control how the alpha
channel of an image should be handled.  This function can create a
bilevel clipping mask (black and white) and use it while painting
the image.  In the future, when the X Window System gets an alpha
channel extension, it will be possible to do full alpha
compositing onto arbitrary drawables.  For now both cases fall
back to a bilevel clipping mask.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><a name="GDK-PIXBUF-ALPHA-BILEVEL:CAPS"></a><span class="term"><code class="literal">GDK_PIXBUF_ALPHA_BILEVEL</code></span></p></td>
<td>A bilevel clipping mask (black and white)
 will be created and used to draw the image.  Pixels below 0.5 opacity
 will be considered fully transparent, and all others will be
 considered fully opaque.
</td>
</tr>
<tr>
<td><p><a name="GDK-PIXBUF-ALPHA-FULL:CAPS"></a><span class="term"><code class="literal">GDK_PIXBUF_ALPHA_FULL</code></span></p></td>
<td>For now falls back to <a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#GDK-PIXBUF-ALPHA-BILEVEL:CAPS"><span class="type">GDK_PIXBUF_ALPHA_BILEVEL</span></a>.
 In the future it will do full alpha compositing.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GdkPixbuf-struct"></a><h3>GdkPixbuf</h3>
<pre class="programlisting">typedef struct _GdkPixbuf GdkPixbuf;</pre>
<p>
This is the main structure in the &amp;gdk-pixbuf; library.  It is
used to represent images.  It contains information about the
image's pixel data, its color space, bits per sample, width and
height, and the rowstride (the number of bytes between the start of
one row and the start of the next).
</p>
</div>
<hr>
<div class="refsect2">
<a name="gdk-pixbuf-get-colorspace"></a><h3>gdk_pixbuf_get_colorspace ()</h3>
<pre class="programlisting"><a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkColorspace" title="enum GdkColorspace"><span class="returnvalue">GdkColorspace</span></a>       gdk_pixbuf_get_colorspace           (<em class="parameter"><code>const <a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkPixbuf"><span class="type">GdkPixbuf</span></a> *pixbuf</code></em>);</pre>
<p>
Queries the color space of a pixbuf.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>pixbuf</code></em> :</span></p></td>
<td>A pixbuf.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>Color space.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gdk-pixbuf-get-n-channels"></a><h3>gdk_pixbuf_get_n_channels ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span>                 gdk_pixbuf_get_n_channels           (<em class="parameter"><code>const <a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkPixbuf"><span class="type">GdkPixbuf</span></a> *pixbuf</code></em>);</pre>
<p>
Queries the number of channels of a pixbuf.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>pixbuf</code></em> :</span></p></td>
<td>A pixbuf.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>Number of channels.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gdk-pixbuf-get-has-alpha"></a><h3>gdk_pixbuf_get_has_alpha ()</h3>
<pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>            gdk_pixbuf_get_has_alpha            (<em class="parameter"><code>const <a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkPixbuf"><span class="type">GdkPixbuf</span></a> *pixbuf</code></em>);</pre>
<p>
Queries whether a pixbuf has an alpha channel (opacity information).
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>pixbuf</code></em> :</span></p></td>
<td>A pixbuf.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if it has an alpha channel, <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> otherwise.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gdk-pixbuf-get-bits-per-sample"></a><h3>gdk_pixbuf_get_bits_per_sample ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span>                 gdk_pixbuf_get_bits_per_sample      (<em class="parameter"><code>const <a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkPixbuf"><span class="type">GdkPixbuf</span></a> *pixbuf</code></em>);</pre>
<p>
Queries the number of bits per color sample in a pixbuf.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>pixbuf</code></em> :</span></p></td>
<td>A pixbuf.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>Number of bits per color sample.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gdk-pixbuf-get-pixels"></a><h3>gdk_pixbuf_get_pixels ()</h3>
<pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guchar"><span class="returnvalue">guchar</span></a> *            gdk_pixbuf_get_pixels               (<em class="parameter"><code>const <a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkPixbuf"><span class="type">GdkPixbuf</span></a> *pixbuf</code></em>);</pre>
<p>
Queries a pointer to the pixel data of a pixbuf.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>pixbuf</code></em> :</span></p></td>
<td>A pixbuf.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>A pointer to the pixbuf's pixel data.
Please see <a class="xref" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#image-data" title="Image Data">the section called “Image Data”</a> for information about how
the pixel data is stored in memory. <span class="annotation">[<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gdk-pixbuf-get-pixels-with-length"></a><h3>gdk_pixbuf_get_pixels_with_length ()</h3>
<pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guchar"><span class="returnvalue">guchar</span></a> *            gdk_pixbuf_get_pixels_with_length   (<em class="parameter"><code>const <a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkPixbuf"><span class="type">GdkPixbuf</span></a> *pixbuf</code></em>,
                                                         <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> *length</code></em>);</pre>
<p>
Queries a pointer to the pixel data of a pixbuf.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>pixbuf</code></em> :</span></p></td>
<td>A pixbuf.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>length</code></em> :</span></p></td>
<td>The length of the binary data. <span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>A pointer to the pixbuf's
pixel data.  Please see <a class="xref" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#image-data" title="Image Data">the section called “Image Data”</a>
for information about how the pixel data is stored in
memory.
Rename to: gdk_pixbuf_get_pixels. <span class="annotation">[<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> length=length]</span>
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 2.26</p>
</div>
<hr>
<div class="refsect2">
<a name="gdk-pixbuf-get-width"></a><h3>gdk_pixbuf_get_width ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span>                 gdk_pixbuf_get_width                (<em class="parameter"><code>const <a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkPixbuf"><span class="type">GdkPixbuf</span></a> *pixbuf</code></em>);</pre>
<p>
Queries the width of a pixbuf.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>pixbuf</code></em> :</span></p></td>
<td>A pixbuf.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>Width in pixels.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gdk-pixbuf-get-height"></a><h3>gdk_pixbuf_get_height ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span>                 gdk_pixbuf_get_height               (<em class="parameter"><code>const <a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkPixbuf"><span class="type">GdkPixbuf</span></a> *pixbuf</code></em>);</pre>
<p>
Queries the height of a pixbuf.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>pixbuf</code></em> :</span></p></td>
<td>A pixbuf.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>Height in pixels.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gdk-pixbuf-get-rowstride"></a><h3>gdk_pixbuf_get_rowstride ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span>                 gdk_pixbuf_get_rowstride            (<em class="parameter"><code>const <a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkPixbuf"><span class="type">GdkPixbuf</span></a> *pixbuf</code></em>);</pre>
<p>
Queries the rowstride of a pixbuf, which is the number of bytes between the start of a row
and the start of the next row.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>pixbuf</code></em> :</span></p></td>
<td>A pixbuf.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>Distance between row starts.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gdk-pixbuf-get-byte-length"></a><h3>gdk_pixbuf_get_byte_length ()</h3>
<pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gsize"><span class="returnvalue">gsize</span></a>               gdk_pixbuf_get_byte_length          (<em class="parameter"><code>const <a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkPixbuf"><span class="type">GdkPixbuf</span></a> *pixbuf</code></em>);</pre>
<p>
Returns the length of the pixel data, in bytes.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>pixbuf</code></em> :</span></p></td>
<td>A pixbuf</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The length of the pixel data.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 2.26</p>
</div>
<hr>
<div class="refsect2">
<a name="gdk-pixbuf-get-option"></a><h3>gdk_pixbuf_get_option ()</h3>
<pre class="programlisting">const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *       gdk_pixbuf_get_option               (<em class="parameter"><code><a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkPixbuf"><span class="type">GdkPixbuf</span></a> *pixbuf</code></em>,
                                                         <em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *key</code></em>);</pre>
<p>
Looks up <em class="parameter"><code>key</code></em> in the list of options that may have been attached to the
<em class="parameter"><code>pixbuf</code></em> when it was loaded, or that may have been attached by another
function using <a class="link" href="gdk-pixbuf-Module-Interface.html#gdk-pixbuf-set-option" title="gdk_pixbuf_set_option ()"><code class="function">gdk_pixbuf_set_option()</code></a>.
</p>
<p>
For instance, the ANI loader provides "Title" and "Artist" options. 
The ICO, XBM, and XPM loaders provide "x_hot" and "y_hot" hot-spot 
options for cursor definitions. The PNG loader provides the tEXt ancillary
chunk key/value pairs as options. Since 2.12, the TIFF and JPEG loaders
return an "orientation" option string that corresponds to the embedded 
TIFF/Exif orientation tag (if present).
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>pixbuf</code></em> :</span></p></td>
<td>a <a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkPixbuf"><span class="type">GdkPixbuf</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>key</code></em> :</span></p></td>
<td>a nul-terminated string.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the value associated with <em class="parameter"><code>key</code></em>. This is a nul-terminated
string that should not be freed or <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if <em class="parameter"><code>key</code></em> was not found.</td>
</tr>
</tbody>
</table></div>
</div>
</div>
<div class="refsect1">
<a name="gdk-pixbuf-The-GdkPixbuf-Structure.property-details"></a><h2>Property Details</h2>
<div class="refsect2">
<a name="GdkPixbuf--bits-per-sample"></a><h3>The <code class="literal">"bits-per-sample"</code> property</h3>
<pre class="programlisting">  "bits-per-sample"          <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a>                  : Read / Write / Construct Only</pre>
<p>
The number of bits per sample.
Currently only 8 bit per sample are supported.
</p>
<p>Allowed values: [1,16]</p>
<p>Default value: 8</p>
</div>
<hr>
<div class="refsect2">
<a name="GdkPixbuf--colorspace"></a><h3>The <code class="literal">"colorspace"</code> property</h3>
<pre class="programlisting">  "colorspace"               <a class="link" href="gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkColorspace" title="enum GdkColorspace"><span class="type">GdkColorspace</span></a>         : Read / Write / Construct Only</pre>
<p>The colorspace in which the samples are interpreted.</p>
<p>Default value: GDK_COLORSPACE_RGB</p>
</div>
<hr>
<div class="refsect2">
<a name="GdkPixbuf--has-alpha"></a><h3>The <code class="literal">"has-alpha"</code> property</h3>
<pre class="programlisting">  "has-alpha"                <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a>              : Read / Write / Construct Only</pre>
<p>Whether the pixbuf has an alpha channel.</p>
<p>Default value: FALSE</p>
</div>
<hr>
<div class="refsect2">
<a name="GdkPixbuf--height"></a><h3>The <code class="literal">"height"</code> property</h3>
<pre class="programlisting">  "height"                   <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a>                  : Read / Write / Construct Only</pre>
<p>The number of rows of the pixbuf.</p>
<p>Allowed values: &gt;= 1</p>
<p>Default value: 1</p>
</div>
<hr>
<div class="refsect2">
<a name="GdkPixbuf--n-channels"></a><h3>The <code class="literal">"n-channels"</code> property</h3>
<pre class="programlisting">  "n-channels"               <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a>                  : Read / Write / Construct Only</pre>
<p>
The number of samples per pixel. 
Currently, only 3 or 4 samples per pixel are supported.
</p>
<p>Allowed values: &gt;= 0</p>
<p>Default value: 3</p>
</div>
<hr>
<div class="refsect2">
<a name="GdkPixbuf--pixels"></a><h3>The <code class="literal">"pixels"</code> property</h3>
<pre class="programlisting">  "pixels"                   <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a>              : Read / Write / Construct Only</pre>
<p>A pointer to the pixel data of the pixbuf.</p>
</div>
<hr>
<div class="refsect2">
<a name="GdkPixbuf--rowstride"></a><h3>The <code class="literal">"rowstride"</code> property</h3>
<pre class="programlisting">  "rowstride"                <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a>                  : Read / Write / Construct Only</pre>
<p>
The number of bytes between the start of a row and 
the start of the next row. This number must (obviously)
be at least as large as the width of the pixbuf.
</p>
<p>Allowed values: &gt;= 1</p>
<p>Default value: 1</p>
</div>
<hr>
<div class="refsect2">
<a name="GdkPixbuf--width"></a><h3>The <code class="literal">"width"</code> property</h3>
<pre class="programlisting">  "width"                    <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a>                  : Read / Write / Construct Only</pre>
<p>The number of columns of the pixbuf.</p>
<p>Allowed values: &gt;= 1</p>
<p>Default value: 1</p>
</div>
</div>
</div>
<div class="footer">
<hr>
          Generated by GTK-Doc V1.18</div>
</body>
</html>