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<title>context</title>
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<a name="libg3d-context"></a><div class="titlepage"></div>
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<h2><span class="refentrytitle"><a name="libg3d-context.top_of_page"></a>context</span></h2>
<p>context — Libg3d initialization and configuration</p>
</td>
<td valign="top" align="right"></td>
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<div class="refsynopsisdiv">
<a name="libg3d-context.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">
#include <g3d/g3d.h>
<a class="link" href="libg3d-context.html#G3DContext" title="G3DContext">G3DContext</a>;
<a class="link" href="libg3d-context.html#G3DContext" title="G3DContext"><span class="returnvalue">G3DContext</span></a> * <a class="link" href="libg3d-context.html#g3d-context-new" title="g3d_context_new ()">g3d_context_new</a> (<em class="parameter"><code><span class="type">void</span></code></em>);
<span class="returnvalue">void</span> <a class="link" href="libg3d-context.html#g3d-context-free" title="g3d_context_free ()">g3d_context_free</a> (<em class="parameter"><code><a class="link" href="libg3d-context.html#G3DContext" title="G3DContext"><span class="type">G3DContext</span></a> *context</code></em>);
<span class="returnvalue">gboolean</span> (<a class="link" href="libg3d-context.html#G3DSetBgColorFunc" title="G3DSetBgColorFunc ()">*G3DSetBgColorFunc</a>) (<em class="parameter"><code><a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat"><span class="type">G3DFloat</span></a> r</code></em>,
<em class="parameter"><code><a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat"><span class="type">G3DFloat</span></a> g</code></em>,
<em class="parameter"><code><a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat"><span class="type">G3DFloat</span></a> b</code></em>,
<em class="parameter"><code><a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat"><span class="type">G3DFloat</span></a> a</code></em>,
<em class="parameter"><code><span class="type">gpointer</span> user_data</code></em>);
<span class="returnvalue">gboolean</span> (<a class="link" href="libg3d-context.html#G3DUpdateInterfaceFunc" title="G3DUpdateInterfaceFunc ()">*G3DUpdateInterfaceFunc</a>) (<em class="parameter"><code><span class="type">gpointer</span> user_data</code></em>);
<span class="returnvalue">gboolean</span> (<a class="link" href="libg3d-context.html#G3DUpdateProgressBarFunc" title="G3DUpdateProgressBarFunc ()">*G3DUpdateProgressBarFunc</a>) (<em class="parameter"><code><a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat"><span class="type">G3DFloat</span></a> percentage</code></em>,
<em class="parameter"><code><span class="type">gboolean</span> show</code></em>,
<em class="parameter"><code><span class="type">gpointer</span> user_data</code></em>);
<span class="returnvalue">gboolean</span> <a class="link" href="libg3d-context.html#g3d-context-update-interface" title="g3d_context_update_interface ()">g3d_context_update_interface</a> (<em class="parameter"><code><a class="link" href="libg3d-context.html#G3DContext" title="G3DContext"><span class="type">G3DContext</span></a> *context</code></em>);
<span class="returnvalue">void</span> <a class="link" href="libg3d-context.html#g3d-context-set-update-interface-func" title="g3d_context_set_update_interface_func ()">g3d_context_set_update_interface_func</a>
(<em class="parameter"><code><a class="link" href="libg3d-context.html#G3DContext" title="G3DContext"><span class="type">G3DContext</span></a> *context</code></em>,
<em class="parameter"><code><a class="link" href="libg3d-context.html#G3DUpdateInterfaceFunc" title="G3DUpdateInterfaceFunc ()"><span class="type">G3DUpdateInterfaceFunc</span></a> func</code></em>,
<em class="parameter"><code><span class="type">gpointer</span> user_data</code></em>);
<span class="returnvalue">gboolean</span> <a class="link" href="libg3d-context.html#g3d-context-update-progress-bar" title="g3d_context_update_progress_bar ()">g3d_context_update_progress_bar</a> (<em class="parameter"><code><a class="link" href="libg3d-context.html#G3DContext" title="G3DContext"><span class="type">G3DContext</span></a> *context</code></em>,
<em class="parameter"><code><a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat"><span class="type">G3DFloat</span></a> percentage</code></em>,
<em class="parameter"><code><span class="type">gboolean</span> visibility</code></em>);
<span class="returnvalue">void</span> <a class="link" href="libg3d-context.html#g3d-context-set-update-progress-bar-func" title="g3d_context_set_update_progress_bar_func ()">g3d_context_set_update_progress_bar_func</a>
(<em class="parameter"><code><a class="link" href="libg3d-context.html#G3DContext" title="G3DContext"><span class="type">G3DContext</span></a> *context</code></em>,
<em class="parameter"><code><a class="link" href="libg3d-context.html#G3DUpdateProgressBarFunc" title="G3DUpdateProgressBarFunc ()"><span class="type">G3DUpdateProgressBarFunc</span></a> func</code></em>,
<em class="parameter"><code><span class="type">gpointer</span> user_data</code></em>);
<span class="returnvalue">gboolean</span> <a class="link" href="libg3d-context.html#g3d-context-set-bgcolor" title="g3d_context_set_bgcolor ()">g3d_context_set_bgcolor</a> (<em class="parameter"><code><a class="link" href="libg3d-context.html#G3DContext" title="G3DContext"><span class="type">G3DContext</span></a> *context</code></em>,
<em class="parameter"><code><a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat"><span class="type">G3DFloat</span></a> r</code></em>,
<em class="parameter"><code><a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat"><span class="type">G3DFloat</span></a> g</code></em>,
<em class="parameter"><code><a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat"><span class="type">G3DFloat</span></a> b</code></em>,
<em class="parameter"><code><a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat"><span class="type">G3DFloat</span></a> a</code></em>);
<span class="returnvalue">void</span> <a class="link" href="libg3d-context.html#g3d-context-set-set-bgcolor-func" title="g3d_context_set_set_bgcolor_func ()">g3d_context_set_set_bgcolor_func</a> (<em class="parameter"><code><a class="link" href="libg3d-context.html#G3DContext" title="G3DContext"><span class="type">G3DContext</span></a> *context</code></em>,
<em class="parameter"><code><a class="link" href="libg3d-context.html#G3DSetBgColorFunc" title="G3DSetBgColorFunc ()"><span class="type">G3DSetBgColorFunc</span></a> func</code></em>,
<em class="parameter"><code><span class="type">gpointer</span> user_data</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="libg3d-context.description"></a><h2>Description</h2>
<p>
All state information is saved in the context. It also serves as an
interface to the application.
</p>
</div>
<div class="refsect1">
<a name="libg3d-context.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="G3DContext"></a><h3>G3DContext</h3>
<pre class="programlisting">typedef struct {
} G3DContext;
</pre>
<p>
Internal stuff for libg3d.
</p>
</div>
<hr>
<div class="refsect2">
<a name="g3d-context-new"></a><h3>g3d_context_new ()</h3>
<pre class="programlisting"><a class="link" href="libg3d-context.html#G3DContext" title="G3DContext"><span class="returnvalue">G3DContext</span></a> * g3d_context_new (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>
Create a new context. This initializes the library (and also the
plugin system so this has not to be done seperately).
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a valid context, or NULL on failure.</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="g3d-context-free"></a><h3>g3d_context_free ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> g3d_context_free (<em class="parameter"><code><a class="link" href="libg3d-context.html#G3DContext" title="G3DContext"><span class="type">G3DContext</span></a> *context</code></em>);</pre>
<p>
Cleans up the context and the plugin system and frees all reserved
memory.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>context</code></em> :</span></p></td>
<td>the context to free</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="G3DSetBgColorFunc"></a><h3>G3DSetBgColorFunc ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span> (*G3DSetBgColorFunc) (<em class="parameter"><code><a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat"><span class="type">G3DFloat</span></a> r</code></em>,
<em class="parameter"><code><a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat"><span class="type">G3DFloat</span></a> g</code></em>,
<em class="parameter"><code><a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat"><span class="type">G3DFloat</span></a> b</code></em>,
<em class="parameter"><code><a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat"><span class="type">G3DFloat</span></a> a</code></em>,
<em class="parameter"><code><span class="type">gpointer</span> user_data</code></em>);</pre>
<p>
Background color setting callback.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>r</code></em> :</span></p></td>
<td>red component</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>g</code></em> :</span></p></td>
<td>green component</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>b</code></em> :</span></p></td>
<td>blue component</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>a</code></em> :</span></p></td>
<td>alpha component</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>opaque data as given to <a class="link" href="libg3d-context.html#g3d-context-set-set-bgcolor-func" title="g3d_context_set_set_bgcolor_func ()"><code class="function">g3d_context_set_set_bgcolor_func()</code></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>TRUE on success, FALSE else.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="G3DUpdateInterfaceFunc"></a><h3>G3DUpdateInterfaceFunc ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span> (*G3DUpdateInterfaceFunc) (<em class="parameter"><code><span class="type">gpointer</span> user_data</code></em>);</pre>
<p>
Interface updating callback.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>opaque data as given to <a class="link" href="libg3d-context.html#g3d-context-set-update-interface-func" title="g3d_context_set_update_interface_func ()"><code class="function">g3d_context_set_update_interface_func()</code></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>TRUE on success, FALSE else.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="G3DUpdateProgressBarFunc"></a><h3>G3DUpdateProgressBarFunc ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span> (*G3DUpdateProgressBarFunc) (<em class="parameter"><code><a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat"><span class="type">G3DFloat</span></a> percentage</code></em>,
<em class="parameter"><code><span class="type">gboolean</span> show</code></em>,
<em class="parameter"><code><span class="type">gpointer</span> user_data</code></em>);</pre>
<p>
Progress updating callback.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>percentage</code></em> :</span></p></td>
<td>progress of plugin operation</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>show</code></em> :</span></p></td>
<td>
<span class="type">TRUE</span> if the progress bar should be visible, <span class="type">FALSE</span> else</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>opaque data as given to
<a class="link" href="libg3d-context.html#g3d-context-set-update-progress-bar-func" title="g3d_context_set_update_progress_bar_func ()"><code class="function">g3d_context_set_update_progress_bar_func()</code></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>TRUE on success, FALSE else.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="g3d-context-update-interface"></a><h3>g3d_context_update_interface ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span> g3d_context_update_interface (<em class="parameter"><code><a class="link" href="libg3d-context.html#G3DContext" title="G3DContext"><span class="type">G3DContext</span></a> *context</code></em>);</pre>
<p>
Try to update the interface. This will call a function registered with
<em class="parameter"><code>g3d_context_set_update_interface_func</code></em>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>context</code></em> :</span></p></td>
<td>a valid context</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>TRUE on success, FALSE else</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="g3d-context-set-update-interface-func"></a><h3>g3d_context_set_update_interface_func ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> g3d_context_set_update_interface_func
(<em class="parameter"><code><a class="link" href="libg3d-context.html#G3DContext" title="G3DContext"><span class="type">G3DContext</span></a> *context</code></em>,
<em class="parameter"><code><a class="link" href="libg3d-context.html#G3DUpdateInterfaceFunc" title="G3DUpdateInterfaceFunc ()"><span class="type">G3DUpdateInterfaceFunc</span></a> func</code></em>,
<em class="parameter"><code><span class="type">gpointer</span> user_data</code></em>);</pre>
<p>
Registers a callback function for updating the interface.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>context</code></em> :</span></p></td>
<td>a valid context</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>func</code></em> :</span></p></td>
<td>the callback function</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>user-defined opaque pointer</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="g3d-context-update-progress-bar"></a><h3>g3d_context_update_progress_bar ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span> g3d_context_update_progress_bar (<em class="parameter"><code><a class="link" href="libg3d-context.html#G3DContext" title="G3DContext"><span class="type">G3DContext</span></a> *context</code></em>,
<em class="parameter"><code><a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat"><span class="type">G3DFloat</span></a> percentage</code></em>,
<em class="parameter"><code><span class="type">gboolean</span> visibility</code></em>);</pre>
<p>
Try to update the progress bar.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>context</code></em> :</span></p></td>
<td>a valid context</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>percentage</code></em> :</span></p></td>
<td>the percentage to set on the progress bar</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>visibility</code></em> :</span></p></td>
<td>show or hide the progress bar</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>TRUE on success, FALSE else</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="g3d-context-set-update-progress-bar-func"></a><h3>g3d_context_set_update_progress_bar_func ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> g3d_context_set_update_progress_bar_func
(<em class="parameter"><code><a class="link" href="libg3d-context.html#G3DContext" title="G3DContext"><span class="type">G3DContext</span></a> *context</code></em>,
<em class="parameter"><code><a class="link" href="libg3d-context.html#G3DUpdateProgressBarFunc" title="G3DUpdateProgressBarFunc ()"><span class="type">G3DUpdateProgressBarFunc</span></a> func</code></em>,
<em class="parameter"><code><span class="type">gpointer</span> user_data</code></em>);</pre>
<p>
Registers a callback function for updating the progress bar.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>context</code></em> :</span></p></td>
<td>a valid context</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>func</code></em> :</span></p></td>
<td>the callback function</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>user-defined opaque pointer</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="g3d-context-set-bgcolor"></a><h3>g3d_context_set_bgcolor ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span> g3d_context_set_bgcolor (<em class="parameter"><code><a class="link" href="libg3d-context.html#G3DContext" title="G3DContext"><span class="type">G3DContext</span></a> *context</code></em>,
<em class="parameter"><code><a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat"><span class="type">G3DFloat</span></a> r</code></em>,
<em class="parameter"><code><a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat"><span class="type">G3DFloat</span></a> g</code></em>,
<em class="parameter"><code><a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat"><span class="type">G3DFloat</span></a> b</code></em>,
<em class="parameter"><code><a class="link" href="libg3d-types.html#G3DFloat" title="G3DFloat"><span class="type">G3DFloat</span></a> a</code></em>);</pre>
<p>
Try to set the background color. This will call a function registered
with <em class="parameter"><code>g3d_context_set_set_bgcolor_func</code></em>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>context</code></em> :</span></p></td>
<td>a valid context</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>r</code></em> :</span></p></td>
<td>red component (range: 0.0 .. 1.0)</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>g</code></em> :</span></p></td>
<td>green component (range: 0.0 .. 1.0)</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>b</code></em> :</span></p></td>
<td>green component (range: 0.0 .. 1.0)</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>a</code></em> :</span></p></td>
<td>alpha component</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>TRUE on success, FALSE else</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="g3d-context-set-set-bgcolor-func"></a><h3>g3d_context_set_set_bgcolor_func ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> g3d_context_set_set_bgcolor_func (<em class="parameter"><code><a class="link" href="libg3d-context.html#G3DContext" title="G3DContext"><span class="type">G3DContext</span></a> *context</code></em>,
<em class="parameter"><code><a class="link" href="libg3d-context.html#G3DSetBgColorFunc" title="G3DSetBgColorFunc ()"><span class="type">G3DSetBgColorFunc</span></a> func</code></em>,
<em class="parameter"><code><span class="type">gpointer</span> user_data</code></em>);</pre>
<p>
Registers a callback function for setting the background color.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>context</code></em> :</span></p></td>
<td>a valid context</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>func</code></em> :</span></p></td>
<td>the callback function</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>user-defined opaque pointer</td>
</tr>
</tbody>
</table></div>
</div>
</div>
<div class="refsect1">
<a name="libg3d-context.see-also"></a><h2>See Also</h2>
<a class="link" href="libg3d-context.html#G3DContext" title="G3DContext"><span class="type">G3DContext</span></a>
</div>
</div>
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