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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<a href="#cogl-2.0-experimental-Versioning-utility-macros.synopsis" class="shortcut">Top</a>
                   | 
                  <a href="#cogl-2.0-experimental-Versioning-utility-macros.description" class="shortcut">Description</a>
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<div class="refentry">
<a name="cogl-2.0-experimental-Versioning-utility-macros"></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-Versioning-utility-macros.top_of_page"></a>Versioning utility macros</span></h2>
<p>Versioning utility macros — Macros for determining the version of Cogl being used</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<a name="cogl-2.0-experimental-Versioning-utility-macros.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">#define             <a class="link" href="cogl-2.0-experimental-Versioning-utility-macros.html#COGL-VERSION-MAJOR:CAPS" title="COGL_VERSION_MAJOR">COGL_VERSION_MAJOR</a>
#define             <a class="link" href="cogl-2.0-experimental-Versioning-utility-macros.html#COGL-VERSION-MINOR:CAPS" title="COGL_VERSION_MINOR">COGL_VERSION_MINOR</a>
#define             <a class="link" href="cogl-2.0-experimental-Versioning-utility-macros.html#COGL-VERSION-MICRO:CAPS" title="COGL_VERSION_MICRO">COGL_VERSION_MICRO</a>
#define             <a class="link" href="cogl-2.0-experimental-Versioning-utility-macros.html#COGL-VERSION-STRING:CAPS" title="COGL_VERSION_STRING">COGL_VERSION_STRING</a>
#define             <a class="link" href="cogl-2.0-experimental-Versioning-utility-macros.html#COGL-VERSION:CAPS" title="COGL_VERSION">COGL_VERSION</a>
#define             <a class="link" href="cogl-2.0-experimental-Versioning-utility-macros.html#COGL-VERSION-ENCODE:CAPS" title="COGL_VERSION_ENCODE()">COGL_VERSION_ENCODE</a>                 (major,
                                                         minor,
                                                         micro)
#define             <a class="link" href="cogl-2.0-experimental-Versioning-utility-macros.html#COGL-VERSION-CHECK:CAPS" title="COGL_VERSION_CHECK()">COGL_VERSION_CHECK</a>                  (major,
                                                         minor,
                                                         micro)
#define             <a class="link" href="cogl-2.0-experimental-Versioning-utility-macros.html#COGL-VERSION-GET-MAJOR:CAPS" title="COGL_VERSION_GET_MAJOR()">COGL_VERSION_GET_MAJOR</a>              (version)
#define             <a class="link" href="cogl-2.0-experimental-Versioning-utility-macros.html#COGL-VERSION-GET-MINOR:CAPS" title="COGL_VERSION_GET_MINOR()">COGL_VERSION_GET_MINOR</a>              (version)
#define             <a class="link" href="cogl-2.0-experimental-Versioning-utility-macros.html#COGL-VERSION-GET-MICRO:CAPS" title="COGL_VERSION_GET_MICRO()">COGL_VERSION_GET_MICRO</a>              (version)
</pre>
</div>
<div class="refsect1">
<a name="cogl-2.0-experimental-Versioning-utility-macros.description"></a><h2>Description</h2>
<p>
Cogl offers a set of macros for checking the version of the library
at compile time.
</p>
<p>
Cogl adds version information to both API deprecations and additions;
by definining the macros <code class="literal">COGL_VERSION_MIN_REQUIRED</code> and
<code class="literal">COGL_VERSION_MAX_ALLOWED</code>, you can specify the range of Cogl versions
whose API you want to use. Functions that were deprecated before, or
introduced after, this range will trigger compiler warnings. For instance,
if we define the following symbols:
</p>
<p>
</p>
<div class="informalexample"><pre class="programlisting">
  COGL_VERSION_MIN_REQUIRED = COGL_VERSION_1_6
  COGL_VERSION_MAX_ALLOWED  = COGL_VERSION_1_8
</pre></div>
<p>
</p>
<p>
and we have the following functions annotated in the Cogl headers:
</p>
<p>
</p>
<div class="informalexample"><pre class="programlisting">
  COGL_DEPRECATED_IN_1_4 void cogl_function_A (void);
  COGL_DEPRECATED_IN_1_6 void cogl_function_B (void);
  COGL_AVAILABLE_IN_1_8 void cogl_function_C (void);
  COGL_AVAILABLE_IN_1_10 void cogl_function_D (void);
</pre></div>
<p>
</p>
<p>
then any application code using the functions above will get the output:
</p>
<p>
</p>
<div class="informalexample"><pre class="programlisting">
  cogl_function_A: deprecation warning
  cogl_function_B: no warning
  cogl_function_C: no warning
  cogl_function_D: symbol not available warning
</pre></div>
<p>
</p>
<p>
It is possible to disable the compiler warnings by defining the macro
<code class="literal">COGL_DISABLE_DEPRECATION_WARNINGS</code> before including the cogl.h
header.
</p>
</div>
<div class="refsect1">
<a name="cogl-2.0-experimental-Versioning-utility-macros.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="COGL-VERSION-MAJOR:CAPS"></a><h3>COGL_VERSION_MAJOR</h3>
<pre class="programlisting">#define COGL_VERSION_MAJOR COGL_VERSION_MAJOR_INTERNAL
</pre>
<p>
The major version of the Cogl library (1, if <a class="link" href="cogl-2.0-experimental-Versioning-utility-macros.html#COGL-VERSION:CAPS" title="COGL_VERSION"><code class="literal">COGL_VERSION</code></a> is 1.2.3)
</p>
<p class="since">Since 1.12.0</p>
</div>
<hr>
<div class="refsect2">
<a name="COGL-VERSION-MINOR:CAPS"></a><h3>COGL_VERSION_MINOR</h3>
<pre class="programlisting">#define COGL_VERSION_MINOR COGL_VERSION_MINOR_INTERNAL
</pre>
<p>
The minor version of the Cogl library (2, if <a class="link" href="cogl-2.0-experimental-Versioning-utility-macros.html#COGL-VERSION:CAPS" title="COGL_VERSION"><code class="literal">COGL_VERSION</code></a> is 1.2.3)
</p>
<p class="since">Since 1.12.0</p>
</div>
<hr>
<div class="refsect2">
<a name="COGL-VERSION-MICRO:CAPS"></a><h3>COGL_VERSION_MICRO</h3>
<pre class="programlisting">#define COGL_VERSION_MICRO COGL_VERSION_MICRO_INTERNAL
</pre>
<p>
The micro version of the Cogl library (3, if <a class="link" href="cogl-2.0-experimental-Versioning-utility-macros.html#COGL-VERSION:CAPS" title="COGL_VERSION"><code class="literal">COGL_VERSION</code></a> is 1.2.3)
</p>
<p class="since">Since 1.12.0</p>
</div>
<hr>
<div class="refsect2">
<a name="COGL-VERSION-STRING:CAPS"></a><h3>COGL_VERSION_STRING</h3>
<pre class="programlisting">#define COGL_VERSION_STRING COGL_VERSION_STRING_INTERNAL
</pre>
<p>
The full version of the Cogl library, in string form (suited for
string concatenation)
</p>
<p class="since">Since 1.12.0</p>
</div>
<hr>
<div class="refsect2">
<a name="COGL-VERSION:CAPS"></a><h3>COGL_VERSION</h3>
<pre class="programlisting">#define             COGL_VERSION</pre>
<p>
The Cogl version encoded into a single integer using the
<a class="link" href="cogl-2.0-experimental-Versioning-utility-macros.html#COGL-VERSION-ENCODE:CAPS" title="COGL_VERSION_ENCODE()"><code class="function">COGL_VERSION_ENCODE()</code></a> macro. This can be used for quick comparisons
with particular versions.
</p>
<p class="since">Since 1.12.0</p>
</div>
<hr>
<div class="refsect2">
<a name="COGL-VERSION-ENCODE:CAPS"></a><h3>COGL_VERSION_ENCODE()</h3>
<pre class="programlisting">#define             COGL_VERSION_ENCODE(major, minor, micro)</pre>
<p>
Encodes a 3 part version number into a single integer. This can be
used to compare the Cogl version. For example if there is a known
bug in Cogl versions between 1.3.2 and 1.3.4 you could use the
following code to provide a workaround:
</p>
<p>
</p>
<div class="informalexample"><pre class="programlisting">
#if COGL_VERSION &gt;= COGL_VERSION_ENCODE (1, 3, 2) &amp;&amp; \
    COGL_VERSION &lt;= COGL_VERSION_ENCODE (1, 3, 4)
  /* Do the workaround */
#endif
</pre></div>
<p>
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>major</code></em> :</span></p></td>
<td>The major part of a version number</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>minor</code></em> :</span></p></td>
<td>The minor part of a version number</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>micro</code></em> :</span></p></td>
<td>The micro part of a version number</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.12.0</p>
</div>
<hr>
<div class="refsect2">
<a name="COGL-VERSION-CHECK:CAPS"></a><h3>COGL_VERSION_CHECK()</h3>
<pre class="programlisting">#define             COGL_VERSION_CHECK(major, minor, micro)</pre>
<p>
A convenient macro to check whether the Cogl version being compiled
against is at least the given version number. For example if the
function cogl_pipeline_frobnicate was added in version 2.0.1 and
you want to conditionally use that function when it is available,
you could write the following:
</p>
<p>
</p>
<div class="informalexample"><pre class="programlisting">
#if COGL_VERSION_CHECK (2, 0, 1)
cogl_pipeline_frobnicate (pipeline);
#else
/* Frobnication is not supported. Use a red color instead */
cogl_pipeline_set_color_4f (pipeline, 1.0f, 0.0f, 0.0f, 1.0f);
#endif
</pre></div>
<p>
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>major</code></em> :</span></p></td>
<td>The major part of a version number</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>minor</code></em> :</span></p></td>
<td>The minor part of a version number</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>micro</code></em> :</span></p></td>
<td>The micro part of a version number</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<code class="literal">TRUE</code> if the Cogl version being compiled against is
greater than or equal to the given three part version number.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.12.0</p>
</div>
<hr>
<div class="refsect2">
<a name="COGL-VERSION-GET-MAJOR:CAPS"></a><h3>COGL_VERSION_GET_MAJOR()</h3>
<pre class="programlisting">#define             COGL_VERSION_GET_MAJOR(version)</pre>
<p>
Extracts the major part of an encoded version number.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>version</code></em> :</span></p></td>
<td>An encoded version number</td>
</tr></tbody>
</table></div>
<p class="since">Since 1.12.0</p>
</div>
<hr>
<div class="refsect2">
<a name="COGL-VERSION-GET-MINOR:CAPS"></a><h3>COGL_VERSION_GET_MINOR()</h3>
<pre class="programlisting">#define             COGL_VERSION_GET_MINOR(version)</pre>
<p>
Extracts the minor part of an encoded version number.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>version</code></em> :</span></p></td>
<td>An encoded version number</td>
</tr></tbody>
</table></div>
<p class="since">Since 1.12.0</p>
</div>
<hr>
<div class="refsect2">
<a name="COGL-VERSION-GET-MICRO:CAPS"></a><h3>COGL_VERSION_GET_MICRO()</h3>
<pre class="programlisting">#define             COGL_VERSION_GET_MICRO(version)</pre>
<p>
Extracts the micro part of an encoded version number.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>version</code></em> :</span></p></td>
<td>An encoded version number</td>
</tr></tbody>
</table></div>
<p class="since">Since 1.12.0</p>
</div>
</div>
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