This file is indexed.

/usr/share/gtk-doc/html/libgimp/libgimp-gimpconvert.html is in libgimp2.0-doc 2.6.12-1ubuntu1.

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
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>gimpconvert</title>
<meta name="generator" content="DocBook XSL Stylesheets V1.76.1">
<link rel="home" href="index.html" title="GIMP Library Reference Manual">
<link rel="up" href="libgimp-image.html" title="Manupulating Images and their Properties">
<link rel="prev" href="libgimp-gimpcolor.html" title="gimpcolor">
<link rel="next" href="libgimp-gimpdisplay.html" title="gimpdisplay">
<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="libgimp-gimpcolor.html"><img src="left.png" width="24" height="24" border="0" alt="Prev"></a></td>
<td><a accesskey="u" href="libgimp-image.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">GIMP Library Reference Manual</th>
<td><a accesskey="n" href="libgimp-gimpdisplay.html"><img src="right.png" width="24" height="24" border="0" alt="Next"></a></td>
</tr>
<tr><td colspan="5" class="shortcuts">
<a href="#libgimp-gimpconvert.synopsis" class="shortcut">Top</a>
                   | 
                  <a href="#libgimp-gimpconvert.description" class="shortcut">Description</a>
</td></tr>
</table>
<div class="refentry">
<a name="libgimp-gimpconvert"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="libgimp-gimpconvert.top_of_page"></a>gimpconvert</span></h2>
<p>gimpconvert — Conversions between RGB, indexed, and grayscale modes.</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<a name="libgimp-gimpconvert.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis"><span class="returnvalue">gboolean</span>            <a class="link" href="libgimp-gimpconvert.html#gimp-image-convert-rgb" title="gimp_image_convert_rgb ()">gimp_image_convert_rgb</a>              (<em class="parameter"><code><span class="type">gint32</span> image_ID</code></em>);
<span class="returnvalue">gboolean</span>            <a class="link" href="libgimp-gimpconvert.html#gimp-image-convert-grayscale" title="gimp_image_convert_grayscale ()">gimp_image_convert_grayscale</a>        (<em class="parameter"><code><span class="type">gint32</span> image_ID</code></em>);
<span class="returnvalue">gboolean</span>            <a class="link" href="libgimp-gimpconvert.html#gimp-image-convert-indexed" title="gimp_image_convert_indexed ()">gimp_image_convert_indexed</a>          (<em class="parameter"><code><span class="type">gint32</span> image_ID</code></em>,
                                                         <em class="parameter"><code><a class="link" href="libgimp-gimpenums.html#GimpConvertDitherType" title="enum GimpConvertDitherType"><span class="type">GimpConvertDitherType</span></a> dither_type</code></em>,
                                                         <em class="parameter"><code><a class="link" href="libgimp-gimpenums.html#GimpConvertPaletteType" title="enum GimpConvertPaletteType"><span class="type">GimpConvertPaletteType</span></a> palette_type</code></em>,
                                                         <em class="parameter"><code><span class="type">gint</span> num_cols</code></em>,
                                                         <em class="parameter"><code><span class="type">gboolean</span> alpha_dither</code></em>,
                                                         <em class="parameter"><code><span class="type">gboolean</span> remove_unused</code></em>,
                                                         <em class="parameter"><code>const <span class="type">gchar</span> *palette</code></em>);
<span class="returnvalue">gboolean</span>            <a class="link" href="libgimp-gimpconvert.html#gimp-image-convert-set-dither-matrix" title="gimp_image_convert_set_dither_matrix ()">gimp_image_convert_set_dither_matrix</a>
                                                        (<em class="parameter"><code><span class="type">gint</span> width</code></em>,
                                                         <em class="parameter"><code><span class="type">gint</span> height</code></em>,
                                                         <em class="parameter"><code><span class="type">gint</span> matrix_length</code></em>,
                                                         <em class="parameter"><code>const <span class="type">guint8</span> *matrix</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="libgimp-gimpconvert.description"></a><h2>Description</h2>
<p>
Conversions between RGB, indexed, and grayscale modes.
</p>
</div>
<div class="refsect1">
<a name="libgimp-gimpconvert.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="gimp-image-convert-rgb"></a><h3>gimp_image_convert_rgb ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>            gimp_image_convert_rgb              (<em class="parameter"><code><span class="type">gint32</span> image_ID</code></em>);</pre>
<p>
Convert specified image to RGB color
</p>
<p>
This procedure converts the specified image to RGB color. This
process requires an image in Grayscale or Indexed color mode. No
image content is lost in this process aside from the colormap for an
indexed image.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>image_ID</code></em> :</span></p></td>
<td>The image.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>TRUE on success.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gimp-image-convert-grayscale"></a><h3>gimp_image_convert_grayscale ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>            gimp_image_convert_grayscale        (<em class="parameter"><code><span class="type">gint32</span> image_ID</code></em>);</pre>
<p>
Convert specified image to grayscale (256 intensity levels)
</p>
<p>
This procedure converts the specified image to grayscale with 8 bits
per pixel (256 intensity levels). This process requires an image in
RGB or Indexed color mode.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>image_ID</code></em> :</span></p></td>
<td>The image.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>TRUE on success.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gimp-image-convert-indexed"></a><h3>gimp_image_convert_indexed ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>            gimp_image_convert_indexed          (<em class="parameter"><code><span class="type">gint32</span> image_ID</code></em>,
                                                         <em class="parameter"><code><a class="link" href="libgimp-gimpenums.html#GimpConvertDitherType" title="enum GimpConvertDitherType"><span class="type">GimpConvertDitherType</span></a> dither_type</code></em>,
                                                         <em class="parameter"><code><a class="link" href="libgimp-gimpenums.html#GimpConvertPaletteType" title="enum GimpConvertPaletteType"><span class="type">GimpConvertPaletteType</span></a> palette_type</code></em>,
                                                         <em class="parameter"><code><span class="type">gint</span> num_cols</code></em>,
                                                         <em class="parameter"><code><span class="type">gboolean</span> alpha_dither</code></em>,
                                                         <em class="parameter"><code><span class="type">gboolean</span> remove_unused</code></em>,
                                                         <em class="parameter"><code>const <span class="type">gchar</span> *palette</code></em>);</pre>
<p>
Convert specified image to and Indexed image
</p>
<p>
This procedure converts the specified image to 'indexed' color. This
process requires an image in RGB or Grayscale mode. The
'palette_type' specifies what kind of palette to use, A type of '0'
means to use an optimal palette of 'num_cols' generated from the
colors in the image. A type of '1' means to re-use the previous
palette (not currently implemented). A type of '2' means to use the
so-called WWW-optimized palette. Type '3' means to use only black
and white colors. A type of '4' means to use a palette from the gimp
palettes directories. The 'dither type' specifies what kind of
dithering to use. '0' means no dithering, '1' means standard
Floyd-Steinberg error diffusion, '2' means Floyd-Steinberg error
diffusion with reduced bleeding, '3' means dithering based on pixel
location ('Fixed' dithering).
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>image_ID</code></em> :</span></p></td>
<td>The image.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>dither_type</code></em> :</span></p></td>
<td>The dither type to use.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>palette_type</code></em> :</span></p></td>
<td>The type of palette to use.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>num_cols</code></em> :</span></p></td>
<td>The number of colors to quantize to, ignored unless (palette_type == GIMP_MAKE_PALETTE).</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>alpha_dither</code></em> :</span></p></td>
<td>Dither transparency to fake partial opacity.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>remove_unused</code></em> :</span></p></td>
<td>Remove unused or duplicate color entries from final palette, ignored if (palette_type == GIMP_MAKE_PALETTE).</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>palette</code></em> :</span></p></td>
<td>The name of the custom palette to use, ignored unless (palette_type == GIMP_CUSTOM_PALETTE).</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>TRUE on success.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gimp-image-convert-set-dither-matrix"></a><h3>gimp_image_convert_set_dither_matrix ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>            gimp_image_convert_set_dither_matrix
                                                        (<em class="parameter"><code><span class="type">gint</span> width</code></em>,
                                                         <em class="parameter"><code><span class="type">gint</span> height</code></em>,
                                                         <em class="parameter"><code><span class="type">gint</span> matrix_length</code></em>,
                                                         <em class="parameter"><code>const <span class="type">guint8</span> *matrix</code></em>);</pre>
<p>
Set dither matrix for conversion to indexed
</p>
<p>
This procedure sets the dither matrix used when converting images to
INDEXED mode with positional dithering.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>width</code></em> :</span></p></td>
<td>Width of the matrix (0 to reset to default matrix).</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>height</code></em> :</span></p></td>
<td>Height of the matrix (0 to reset to default matrix).</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>matrix_length</code></em> :</span></p></td>
<td>The length of 'matrix'.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>matrix</code></em> :</span></p></td>
<td>The matrix -- all values must be &gt;= 1.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>TRUE on success.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since GIMP 2.4</p>
</div>
</div>
</div>
<div class="footer">
<hr>
          Generated by GTK-Doc V1.18</div>
</body>
</html>