/usr/share/gtk-doc/html/cogl-2.0-experimental/cogl-2.0-experimental-Vertex-Attributes.html is in libcogl-doc 1.22.0-2.
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 | <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Vertex Attributes: Cogl 2.0 Reference Manual</title>
<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
<link rel="home" href="index.html" title="Cogl 2.0 Reference Manual">
<link rel="up" href="cogl-buffer-layout-apis.html" title="Describing the layout of GPU Memory">
<link rel="prev" href="cogl-buffer-layout-apis.html" title="Describing the layout of GPU Memory">
<link rel="next" href="cogl-2.0-experimental-Indices.html" title="Indices">
<meta name="generator" content="GTK-Doc V1.24 (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="5"><tr valign="middle">
<td width="100%" align="left" class="shortcuts">
<a href="#" class="shortcut">Top</a><span id="nav_description"> <span class="dim">|</span>
<a href="#cogl-2.0-experimental-Vertex-Attributes.description" class="shortcut">Description</a></span>
</td>
<td><a accesskey="h" href="index.html"><img src="home.png" width="16" height="16" border="0" alt="Home"></a></td>
<td><a accesskey="u" href="cogl-buffer-layout-apis.html"><img src="up.png" width="16" height="16" border="0" alt="Up"></a></td>
<td><a accesskey="p" href="cogl-buffer-layout-apis.html"><img src="left.png" width="16" height="16" border="0" alt="Prev"></a></td>
<td><a accesskey="n" href="cogl-2.0-experimental-Indices.html"><img src="right.png" width="16" height="16" border="0" alt="Next"></a></td>
</tr></table>
<div class="refentry">
<a name="cogl-2.0-experimental-Vertex-Attributes"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="cogl-2.0-experimental-Vertex-Attributes.top_of_page"></a>Vertex Attributes</span></h2>
<p>Vertex Attributes — Functions for declaring and drawing vertex
attributes</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="cogl-2.0-experimental-Vertex-Attributes.functions"></a><h2>Functions</h2>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="functions_return">
<col class="functions_name">
</colgroup>
<tbody>
<tr>
<td class="function_type">
<a class="link" href="cogl-2.0-experimental-Vertex-Attributes.html#CoglAttribute" title="CoglAttribute"><span class="returnvalue">CoglAttribute</span></a> *
</td>
<td class="function_name">
<a class="link" href="cogl-2.0-experimental-Vertex-Attributes.html#cogl-attribute-new" title="cogl_attribute_new ()">cogl_attribute_new</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="cogl-2.0-experimental-Common-Types.html#CoglBool" title="CoglBool"><span class="returnvalue">CoglBool</span></a>
</td>
<td class="function_name">
<a class="link" href="cogl-2.0-experimental-Vertex-Attributes.html#cogl-is-attribute" title="cogl_is_attribute ()">cogl_is_attribute</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="cogl-2.0-experimental-Vertex-Attributes.html#cogl-attribute-set-normalized" title="cogl_attribute_set_normalized ()">cogl_attribute_set_normalized</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="cogl-2.0-experimental-Common-Types.html#CoglBool" title="CoglBool"><span class="returnvalue">CoglBool</span></a>
</td>
<td class="function_name">
<a class="link" href="cogl-2.0-experimental-Vertex-Attributes.html#cogl-attribute-get-normalized" title="cogl_attribute_get_normalized ()">cogl_attribute_get_normalized</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="cogl-2.0-experimental-CoglAttributeBuffer---Buffers-of-vertex-attributes.html#CoglAttributeBuffer" title="CoglAttributeBuffer"><span class="returnvalue">CoglAttributeBuffer</span></a> *
</td>
<td class="function_name">
<a class="link" href="cogl-2.0-experimental-Vertex-Attributes.html#cogl-attribute-get-buffer" title="cogl_attribute_get_buffer ()">cogl_attribute_get_buffer</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="cogl-2.0-experimental-Vertex-Attributes.html#cogl-attribute-set-buffer" title="cogl_attribute_set_buffer ()">cogl_attribute_set_buffer</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="cogl-2.0-experimental-Vertex-Attributes.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="name">
<col class="description">
</colgroup>
<tbody><tr>
<td class="datatype_keyword"> </td>
<td class="function_name"><a class="link" href="cogl-2.0-experimental-Vertex-Attributes.html#CoglAttribute" title="CoglAttribute">CoglAttribute</a></td>
</tr></tbody>
</table></div>
</div>
<div class="refsect1">
<a name="cogl-2.0-experimental-Vertex-Attributes.description"></a><h2>Description</h2>
<p>FIXME</p>
</div>
<div class="refsect1">
<a name="cogl-2.0-experimental-Vertex-Attributes.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="cogl-attribute-new"></a><h3>cogl_attribute_new ()</h3>
<pre class="programlisting"><a class="link" href="cogl-2.0-experimental-Vertex-Attributes.html#CoglAttribute" title="CoglAttribute"><span class="returnvalue">CoglAttribute</span></a> *
cogl_attribute_new (<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-CoglAttributeBuffer---Buffers-of-vertex-attributes.html#CoglAttributeBuffer" title="CoglAttributeBuffer"><span class="type">CoglAttributeBuffer</span></a> *attribute_buffer</code></em>,
<em class="parameter"><code>const <span class="type">char</span> *name</code></em>,
<em class="parameter"><code><span class="type">size_t</span> stride</code></em>,
<em class="parameter"><code><span class="type">size_t</span> offset</code></em>,
<em class="parameter"><code><span class="type">int</span> components</code></em>,
<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-Common-Types.html#CoglAttributeType" title="enum CoglAttributeType"><span class="type">CoglAttributeType</span></a> type</code></em>);</pre>
<p>Describes the layout for a list of vertex attribute values (For
example, a list of texture coordinates or colors).</p>
<p>The <em class="parameter"><code>name</code></em>
is used to access the attribute inside a GLSL vertex
shader and there are some special names you should use if they are
applicable:</p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">"cogl_position_in" (used for vertex positions)</li>
<li class="listitem">"cogl_color_in" (used for vertex colors)</li>
<li class="listitem">"cogl_tex_coord0_in", "cogl_tex_coord1", ...
(used for vertex texture coordinates)</li>
<li class="listitem">"cogl_normal_in" (used for vertex normals)</li>
<li class="listitem">"cogl_point_size_in" (used to set the size of points
per-vertex. Note this can only be used if
<code class="literal">COGL_FEATURE_ID_POINT_SIZE_ATTRIBUTE</code> is advertised and
<a class="link" href="cogl-2.0-experimental-Pipeline.html#cogl-pipeline-set-per-vertex-point-size" title="cogl_pipeline_set_per_vertex_point_size ()"><code class="function">cogl_pipeline_set_per_vertex_point_size()</code></a> is called on the pipeline.
</li>
</ul></div>
<p>The attribute values corresponding to different vertices can either
be tightly packed or interleaved with other attribute values. For
example it's common to define a structure for a single vertex like:</p>
<div class="informalexample"><pre class="programlisting">
typedef struct
{
float x, y, z; /<!-- -->* position attribute *<!-- -->/
float s, t; /<!-- -->* texture coordinate attribute *<!-- -->/
} MyVertex;
</pre></div>
<p></p>
<p>And then create an array of vertex data something like:</p>
<div class="informalexample"><pre class="programlisting">
MyVertex vertices[100] = { .... }
</pre></div>
<p></p>
<p>In this case, to describe either the position or texture coordinate
attribute you have to move <code class="literal">sizeof (MyVertex)</code> bytes to
move from one vertex to the next. This is called the attribute
<em class="parameter"><code>stride</code></em>
. If you weren't interleving attributes and you instead had
a packed array of float x, y pairs then the attribute stride would
be <code class="literal">(2 * sizeof (float))</code>. So the <em class="parameter"><code>stride</code></em>
is the number of
bytes to move to find the attribute value of the next vertex.</p>
<p>Normally a list of attributes starts at the beginning of an array.
So for the <code class="literal">MyVertex</code> example above the <em class="parameter"><code>offset</code></em>
is the
offset inside the <code class="literal">MyVertex</code> structure to the first
component of the attribute. For the texture coordinate attribute
the offset would be <code class="literal">offsetof (MyVertex, s)</code> or instead of
using the offsetof macro you could use <code class="literal">sizeof (float) *
3</code>. If you've divided your <em class="parameter"><code>array</code></em>
into blocks of non-interleved
attributes then you will need to calculate the <em class="parameter"><code>offset</code></em>
as the number of
bytes in blocks preceding the attribute you're describing.</p>
<p>An attribute often has more than one component. For example a color
is often comprised of 4 red, green, blue and alpha <em class="parameter"><code>components</code></em>
, and a
position may be comprised of 2 x and y <em class="parameter"><code>components</code></em>
. You should aim
to keep the number of components to a minimum as more components
means more data needs to be mapped into the GPU which can be a
bottlneck when dealing with a large number of vertices.</p>
<p>Finally you need to specify the component data type. Here you
should aim to use the smallest type that meets your precision
requirements. Again the larger the type then more data needs to be
mapped into the GPU which can be a bottlneck when dealing with
a large number of vertices.</p>
<p><span class="annotation">[<acronym title="This symbol is a constructor, not a static method."><span class="acronym">constructor</span></acronym>]</span></p>
<div class="refsect3">
<a name="id-1.2.7.2.6.2.18"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>attribute_buffer</p></td>
<td class="parameter_description"><p>The <a class="link" href="cogl-2.0-experimental-CoglAttributeBuffer---Buffers-of-vertex-attributes.html#CoglAttributeBuffer" title="CoglAttributeBuffer"><span class="type">CoglAttributeBuffer</span></a> containing the actual
attribute data</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>name</p></td>
<td class="parameter_description"><p>The name of the attribute (used to reference it from GLSL)</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>stride</p></td>
<td class="parameter_description"><p>The number of bytes to jump to get to the next attribute
value for the next vertex. (Usually
<code class="literal">sizeof (MyVertex)</code>)</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>offset</p></td>
<td class="parameter_description"><p>The byte offset from the start of <em class="parameter"><code>attribute_buffer</code></em>
for
the first attribute value. (Usually
<code class="literal">offsetof (MyVertex, component0)</code></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>components</p></td>
<td class="parameter_description"><p>The number of components (e.g. 4 for an rgba color or
3 for and (x,y,z) position)</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>type</p></td>
<td class="parameter_description"><p>FIXME</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.7.2.6.2.19"></a><h4>Returns</h4>
<p> A newly allocated <a class="link" href="cogl-2.0-experimental-Vertex-Attributes.html#CoglAttribute" title="CoglAttribute"><span class="type">CoglAttribute</span></a>
describing the layout for a list of attribute values
stored in <em class="parameter"><code>array</code></em>
. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="ix06.html#api-index-1.4">1.4</a></p>
<p class="stability">Stability Level: <acronym title="Unstable interfaces are experimental or transitional. They are typically used to
give outside developers early access to new or rapidly changing technology, or
to provide an interim solution to a problem where a more general solution is
anticipated. No claims are made about either source or binary compatibility from
one minor release to the next.
The Unstable interface level is a warning that these interfaces are subject to
change without warning and should not be used in unbundled products.
Given such caveats, customer impact need not be a factor when considering
incompatible changes to an Unstable interface in a major or minor release.
Nonetheless, when such changes are introduced, the changes should still be
mentioned in the release notes for the affected release.
"><span class="acronym">Unstable</span></acronym></p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-is-attribute"></a><h3>cogl_is_attribute ()</h3>
<pre class="programlisting"><a class="link" href="cogl-2.0-experimental-Common-Types.html#CoglBool" title="CoglBool"><span class="returnvalue">CoglBool</span></a>
cogl_is_attribute (<em class="parameter"><code><span class="type">void</span> *object</code></em>);</pre>
<p>Gets whether the given object references a <a class="link" href="cogl-2.0-experimental-Vertex-Attributes.html#CoglAttribute" title="CoglAttribute"><span class="type">CoglAttribute</span></a>.</p>
<div class="refsect3">
<a name="id-1.2.7.2.6.3.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>object</p></td>
<td class="parameter_description"><p>A <a class="link" href="cogl-2.0-experimental-The-Object-Interface.html#CoglObject" title="CoglObject"><span class="type">CoglObject</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.7.2.6.3.6"></a><h4>Returns</h4>
<p> <code class="literal">TRUE</code> if the <em class="parameter"><code>object</code></em>
references a <a class="link" href="cogl-2.0-experimental-Vertex-Attributes.html#CoglAttribute" title="CoglAttribute"><span class="type">CoglAttribute</span></a>,
<code class="literal">FALSE</code> otherwise</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="cogl-attribute-set-normalized"></a><h3>cogl_attribute_set_normalized ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
cogl_attribute_set_normalized (<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-Vertex-Attributes.html#CoglAttribute" title="CoglAttribute"><span class="type">CoglAttribute</span></a> *attribute</code></em>,
<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-Common-Types.html#CoglBool" title="CoglBool"><span class="type">CoglBool</span></a> normalized</code></em>);</pre>
<p>Sets whether fixed point attribute types are mapped to the range
0→1. For example when this property is TRUE and a
<a class="link" href="cogl-2.0-experimental-Common-Types.html#COGL-ATTRIBUTE-TYPE-UNSIGNED-BYTE:CAPS"><code class="literal">COGL_ATTRIBUTE_TYPE_UNSIGNED_BYTE</code></a> type is used then the value 255
will be mapped to 1.0.</p>
<p>The default value of this property depends on the name of the
attribute. For the builtin properties cogl_color_in and
cogl_normal_in it will default to TRUE and for all other names it
will default to FALSE.</p>
<div class="refsect3">
<a name="id-1.2.7.2.6.4.6"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>attribute</p></td>
<td class="parameter_description"><p>A <a class="link" href="cogl-2.0-experimental-Vertex-Attributes.html#CoglAttribute" title="CoglAttribute"><span class="type">CoglAttribute</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>normalized</p></td>
<td class="parameter_description"><p>The new value for the normalized property.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: 1.10</p>
<p class="stability">Stability Level: <acronym title="Unstable interfaces are experimental or transitional. They are typically used to
give outside developers early access to new or rapidly changing technology, or
to provide an interim solution to a problem where a more general solution is
anticipated. No claims are made about either source or binary compatibility from
one minor release to the next.
The Unstable interface level is a warning that these interfaces are subject to
change without warning and should not be used in unbundled products.
Given such caveats, customer impact need not be a factor when considering
incompatible changes to an Unstable interface in a major or minor release.
Nonetheless, when such changes are introduced, the changes should still be
mentioned in the release notes for the affected release.
"><span class="acronym">Unstable</span></acronym></p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-attribute-get-normalized"></a><h3>cogl_attribute_get_normalized ()</h3>
<pre class="programlisting"><a class="link" href="cogl-2.0-experimental-Common-Types.html#CoglBool" title="CoglBool"><span class="returnvalue">CoglBool</span></a>
cogl_attribute_get_normalized (<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-Vertex-Attributes.html#CoglAttribute" title="CoglAttribute"><span class="type">CoglAttribute</span></a> *attribute</code></em>);</pre>
<div class="refsect3">
<a name="id-1.2.7.2.6.5.4"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>attribute</p></td>
<td class="parameter_description"><p>A <a class="link" href="cogl-2.0-experimental-Vertex-Attributes.html#CoglAttribute" title="CoglAttribute"><span class="type">CoglAttribute</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.7.2.6.5.5"></a><h4>Returns</h4>
<p> the value of the normalized property set with
<a class="link" href="cogl-2.0-experimental-Vertex-Attributes.html#cogl-attribute-set-normalized" title="cogl_attribute_set_normalized ()"><code class="function">cogl_attribute_set_normalized()</code></a>.</p>
</div>
<p class="since">Since: 1.10</p>
<p class="stability">Stability Level: <acronym title="Unstable interfaces are experimental or transitional. They are typically used to
give outside developers early access to new or rapidly changing technology, or
to provide an interim solution to a problem where a more general solution is
anticipated. No claims are made about either source or binary compatibility from
one minor release to the next.
The Unstable interface level is a warning that these interfaces are subject to
change without warning and should not be used in unbundled products.
Given such caveats, customer impact need not be a factor when considering
incompatible changes to an Unstable interface in a major or minor release.
Nonetheless, when such changes are introduced, the changes should still be
mentioned in the release notes for the affected release.
"><span class="acronym">Unstable</span></acronym></p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-attribute-get-buffer"></a><h3>cogl_attribute_get_buffer ()</h3>
<pre class="programlisting"><a class="link" href="cogl-2.0-experimental-CoglAttributeBuffer---Buffers-of-vertex-attributes.html#CoglAttributeBuffer" title="CoglAttributeBuffer"><span class="returnvalue">CoglAttributeBuffer</span></a> *
cogl_attribute_get_buffer (<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-Vertex-Attributes.html#CoglAttribute" title="CoglAttribute"><span class="type">CoglAttribute</span></a> *attribute</code></em>);</pre>
<div class="refsect3">
<a name="id-1.2.7.2.6.6.4"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>attribute</p></td>
<td class="parameter_description"><p>A <a class="link" href="cogl-2.0-experimental-Vertex-Attributes.html#CoglAttribute" title="CoglAttribute"><span class="type">CoglAttribute</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.7.2.6.6.5"></a><h4>Returns</h4>
<p> the <a class="link" href="cogl-2.0-experimental-CoglAttributeBuffer---Buffers-of-vertex-attributes.html#CoglAttributeBuffer" title="CoglAttributeBuffer"><span class="type">CoglAttributeBuffer</span></a> that was
set with <a class="link" href="cogl-2.0-experimental-Vertex-Attributes.html#cogl-attribute-set-buffer" title="cogl_attribute_set_buffer ()"><code class="function">cogl_attribute_set_buffer()</code></a> or <a class="link" href="cogl-2.0-experimental-Vertex-Attributes.html#cogl-attribute-new" title="cogl_attribute_new ()"><code class="function">cogl_attribute_new()</code></a>. </p>
<p><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></p>
</div>
<p class="since">Since: 1.10</p>
<p class="stability">Stability Level: <acronym title="Unstable interfaces are experimental or transitional. They are typically used to
give outside developers early access to new or rapidly changing technology, or
to provide an interim solution to a problem where a more general solution is
anticipated. No claims are made about either source or binary compatibility from
one minor release to the next.
The Unstable interface level is a warning that these interfaces are subject to
change without warning and should not be used in unbundled products.
Given such caveats, customer impact need not be a factor when considering
incompatible changes to an Unstable interface in a major or minor release.
Nonetheless, when such changes are introduced, the changes should still be
mentioned in the release notes for the affected release.
"><span class="acronym">Unstable</span></acronym></p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-attribute-set-buffer"></a><h3>cogl_attribute_set_buffer ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
cogl_attribute_set_buffer (<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-Vertex-Attributes.html#CoglAttribute" title="CoglAttribute"><span class="type">CoglAttribute</span></a> *attribute</code></em>,
<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-CoglAttributeBuffer---Buffers-of-vertex-attributes.html#CoglAttributeBuffer" title="CoglAttributeBuffer"><span class="type">CoglAttributeBuffer</span></a> *attribute_buffer</code></em>);</pre>
<p>Sets a new <a class="link" href="cogl-2.0-experimental-CoglAttributeBuffer---Buffers-of-vertex-attributes.html#CoglAttributeBuffer" title="CoglAttributeBuffer"><span class="type">CoglAttributeBuffer</span></a> for the attribute.</p>
<div class="refsect3">
<a name="id-1.2.7.2.6.7.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>attribute</p></td>
<td class="parameter_description"><p>A <a class="link" href="cogl-2.0-experimental-Vertex-Attributes.html#CoglAttribute" title="CoglAttribute"><span class="type">CoglAttribute</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>attribute_buffer</p></td>
<td class="parameter_description"><p>A <a class="link" href="cogl-2.0-experimental-CoglAttributeBuffer---Buffers-of-vertex-attributes.html#CoglAttributeBuffer" title="CoglAttributeBuffer"><span class="type">CoglAttributeBuffer</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: 1.10</p>
<p class="stability">Stability Level: <acronym title="Unstable interfaces are experimental or transitional. They are typically used to
give outside developers early access to new or rapidly changing technology, or
to provide an interim solution to a problem where a more general solution is
anticipated. No claims are made about either source or binary compatibility from
one minor release to the next.
The Unstable interface level is a warning that these interfaces are subject to
change without warning and should not be used in unbundled products.
Given such caveats, customer impact need not be a factor when considering
incompatible changes to an Unstable interface in a major or minor release.
Nonetheless, when such changes are introduced, the changes should still be
mentioned in the release notes for the affected release.
"><span class="acronym">Unstable</span></acronym></p>
</div>
</div>
<div class="refsect1">
<a name="cogl-2.0-experimental-Vertex-Attributes.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="CoglAttribute"></a><h3>CoglAttribute</h3>
<pre class="programlisting">typedef struct _CoglAttribute CoglAttribute;</pre>
</div>
</div>
</div>
<div class="footer">
<hr>Generated by GTK-Doc V1.24</div>
</body>
</html>
|