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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Bitmaps</title>
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<tr><td colspan="5" class="shortcuts">
<a href="#cogl-Bitmaps.synopsis" class="shortcut">Top</a>
                   | 
                  <a href="#cogl-Bitmaps.description" class="shortcut">Description</a>
</td></tr>
</table>
<div class="refentry">
<a name="cogl-Bitmaps"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="cogl-Bitmaps.top_of_page"></a>Bitmaps</span></h2>
<p>Bitmaps — Fuctions for loading images</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<a name="cogl-Bitmaps.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">                    <a class="link" href="cogl-Bitmaps.html#CoglBitmap" title="CoglBitmap">CoglBitmap</a>;
<a class="link" href="cogl-Bitmaps.html#CoglBitmap" title="CoglBitmap"><span class="returnvalue">CoglBitmap</span></a> *        <a class="link" href="cogl-Bitmaps.html#cogl-bitmap-new-from-file" title="cogl_bitmap_new_from_file ()">cogl_bitmap_new_from_file</a>           (<em class="parameter"><code>const <span class="type">char</span> *filename</code></em>,
                                                         <em class="parameter"><code><span class="type">GError</span> **error</code></em>);
<span class="returnvalue">gboolean</span>            <a class="link" href="cogl-Bitmaps.html#cogl-bitmap-get-size-from-file" title="cogl_bitmap_get_size_from_file ()">cogl_bitmap_get_size_from_file</a>      (<em class="parameter"><code>const <span class="type">char</span> *filename</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> *width</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> *height</code></em>);
<span class="returnvalue">gboolean</span>            <a class="link" href="cogl-Bitmaps.html#cogl-is-bitmap" title="cogl_is_bitmap ()">cogl_is_bitmap</a>                      (<em class="parameter"><code><a class="link" href="cogl-General-API.html#CoglHandle" title="CoglHandle"><span class="type">CoglHandle</span></a> handle</code></em>);
enum                <a class="link" href="cogl-Bitmaps.html#CoglBitmapError" title="enum CoglBitmapError">CoglBitmapError</a>;
#define             <a class="link" href="cogl-Bitmaps.html#COGL-BITMAP-ERROR:CAPS" title="COGL_BITMAP_ERROR">COGL_BITMAP_ERROR</a>
</pre>
</div>
<div class="refsect1">
<a name="cogl-Bitmaps.description"></a><h2>Description</h2>
<p>
Cogl allows loading image data into memory as CoglBitmaps without
loading them immediately into GPU textures.
</p>
<p>
<a class="link" href="cogl-Bitmaps.html#CoglBitmap" title="CoglBitmap"><span class="type">CoglBitmap</span></a> is available since Cogl 1.0
</p>
</div>
<div class="refsect1">
<a name="cogl-Bitmaps.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="CoglBitmap"></a><h3>CoglBitmap</h3>
<pre class="programlisting">typedef struct _CoglBitmap CoglBitmap;</pre>
</div>
<hr>
<div class="refsect2">
<a name="cogl-bitmap-new-from-file"></a><h3>cogl_bitmap_new_from_file ()</h3>
<pre class="programlisting"><a class="link" href="cogl-Bitmaps.html#CoglBitmap" title="CoglBitmap"><span class="returnvalue">CoglBitmap</span></a> *        cogl_bitmap_new_from_file           (<em class="parameter"><code>const <span class="type">char</span> *filename</code></em>,
                                                         <em class="parameter"><code><span class="type">GError</span> **error</code></em>);</pre>
<p>
Loads an image file from disk. This function can be safely called from
within a thread.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>filename</code></em> :</span></p></td>
<td>the file to load.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>error</code></em> :</span></p></td>
<td>a <span class="type">GError</span> or <code class="literal">NULL</code>.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a <a class="link" href="cogl-Bitmaps.html#CoglBitmap" title="CoglBitmap"><span class="type">CoglBitmap</span></a> to the new loaded image data, or
<code class="literal">NULL</code> if loading the image failed.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.0</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-bitmap-get-size-from-file"></a><h3>cogl_bitmap_get_size_from_file ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>            cogl_bitmap_get_size_from_file      (<em class="parameter"><code>const <span class="type">char</span> *filename</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> *width</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> *height</code></em>);</pre>
<p>
Parses an image file enough to extract the width and height
of the bitmap.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>filename</code></em> :</span></p></td>
<td>the file to check</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>width</code></em> :</span></p></td>
<td>return location for the bitmap width, or <code class="literal">NULL</code>. <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"><em class="parameter"><code>height</code></em> :</span></p></td>
<td>return location for the bitmap height, or <code class="literal">NULL</code>. <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>
<code class="literal">TRUE</code> if the image was successfully parsed</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.0</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-is-bitmap"></a><h3>cogl_is_bitmap ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>            cogl_is_bitmap                      (<em class="parameter"><code><a class="link" href="cogl-General-API.html#CoglHandle" title="CoglHandle"><span class="type">CoglHandle</span></a> handle</code></em>);</pre>
<p>
Checks whether <em class="parameter"><code>handle</code></em> is a <a class="link" href="cogl-General-API.html#CoglHandle" title="CoglHandle"><span class="type">CoglHandle</span></a> for a bitmap
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>handle</code></em> :</span></p></td>
<td>a <a class="link" href="cogl-General-API.html#CoglHandle" title="CoglHandle"><span class="type">CoglHandle</span></a> for a bitmap</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 passed handle represents a bitmap,
and <code class="literal">FALSE</code> otherwise</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.0</p>
</div>
<hr>
<div class="refsect2">
<a name="CoglBitmapError"></a><h3>enum CoglBitmapError</h3>
<pre class="programlisting">typedef enum {
  COGL_BITMAP_ERROR_FAILED,
  COGL_BITMAP_ERROR_UNKNOWN_TYPE,
  COGL_BITMAP_ERROR_CORRUPT_IMAGE
} CoglBitmapError;
</pre>
<p>
Error codes that can be thrown when performing bitmap
operations. Note that <code class="function">gdk_pixbuf_new_from_file()</code> can also throw
errors directly from the underlying image loading library. For
example, if GdkPixbuf is used then errors <span class="type">GdkPixbufError</span>s
will be used directly.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><a name="COGL-BITMAP-ERROR-FAILED:CAPS"></a><span class="term"><code class="literal">COGL_BITMAP_ERROR_FAILED</code></span></p></td>
<td>Generic failure code, something went
  wrong.
</td>
</tr>
<tr>
<td><p><a name="COGL-BITMAP-ERROR-UNKNOWN-TYPE:CAPS"></a><span class="term"><code class="literal">COGL_BITMAP_ERROR_UNKNOWN_TYPE</code></span></p></td>
<td>Unknown image type.
</td>
</tr>
<tr>
<td><p><a name="COGL-BITMAP-ERROR-CORRUPT-IMAGE:CAPS"></a><span class="term"><code class="literal">COGL_BITMAP_ERROR_CORRUPT_IMAGE</code></span></p></td>
<td>An image file was broken somehow.
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.4</p>
</div>
<hr>
<div class="refsect2">
<a name="COGL-BITMAP-ERROR:CAPS"></a><h3>COGL_BITMAP_ERROR</h3>
<pre class="programlisting">#define COGL_BITMAP_ERROR (cogl_bitmap_error_quark ())
</pre>
<p>
<span class="type">GError</span> domain for bitmap errors.
</p>
<p class="since">Since 1.4</p>
</div>
</div>
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