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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>GStreamer Base Plugins 0.10 Library Reference Manual: gstvideooverlaycomposition</title>
<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
<link rel="home" href="index.html" title="GStreamer Base Plugins 0.10 Library Reference Manual">
<link rel="up" href="gstreamer-video.html" title="Video Library">
<link rel="prev" href="gst-plugins-base-libs-gstvideo.html" title="gstvideo">
<link rel="next" href="gst-plugins-base-libs-gstvideofilter.html" title="gstvideofilter">
<meta name="generator" content="GTK-Doc V1.20 (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="10"><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="#gst-plugins-base-libs-gstvideooverlaycomposition.description" class="shortcut">Description</a></span><span id="nav_hierarchy"> <span class="dim">|</span> 
                  <a href="#gst-plugins-base-libs-gstvideooverlaycomposition.object-hierarchy" class="shortcut">Object Hierarchy</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="gstreamer-video.html"><img src="up.png" width="16" height="16" border="0" alt="Up"></a></td>
<td><a accesskey="p" href="gst-plugins-base-libs-gstvideo.html"><img src="left.png" width="16" height="16" border="0" alt="Prev"></a></td>
<td><a accesskey="n" href="gst-plugins-base-libs-gstvideofilter.html"><img src="right.png" width="16" height="16" border="0" alt="Next"></a></td>
</tr></table>
<div class="refentry">
<a name="gst-plugins-base-libs-gstvideooverlaycomposition"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="gst-plugins-base-libs-gstvideooverlaycomposition.top_of_page"></a>gstvideooverlaycomposition</span></h2>
<p>gstvideooverlaycomposition — Video Buffer Overlay Compositions (Subtitles, Logos)</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="gst-plugins-base-libs-gstvideooverlaycomposition.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="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="returnvalue">GstVideoOverlayComposition</span></a> *
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-new" title="gst_video_overlay_composition_new ()">gst_video_overlay_composition_new</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="returnvalue">GstVideoOverlayComposition</span></a> *
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-ref" title="gst_video_overlay_composition_ref ()">gst_video_overlay_composition_ref</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="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-unref" title="gst_video_overlay_composition_unref ()">gst_video_overlay_composition_unref</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="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-add-rectangle" title="gst_video_overlay_composition_add_rectangle ()">gst_video_overlay_composition_add_rectangle</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a>
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-n-rectangles" title="gst_video_overlay_composition_n_rectangles ()">gst_video_overlay_composition_n_rectangles</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="returnvalue">GstVideoOverlayRectangle</span></a> *
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-get-rectangle" title="gst_video_overlay_composition_get_rectangle ()">gst_video_overlay_composition_get_rectangle</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a>
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-get-seqnum" title="gst_video_overlay_composition_get_seqnum ()">gst_video_overlay_composition_get_seqnum</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="returnvalue">GstVideoOverlayComposition</span></a> *
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-copy" title="gst_video_overlay_composition_copy ()">gst_video_overlay_composition_copy</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="returnvalue">GstVideoOverlayComposition</span></a> *
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-make-writable" title="gst_video_overlay_composition_make_writable ()">gst_video_overlay_composition_make_writable</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-blend" title="gst_video_overlay_composition_blend ()">gst_video_overlay_composition_blend</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="returnvalue">GstVideoOverlayComposition</span></a> *
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-buffer-get-overlay-composition" title="gst_video_buffer_get_overlay_composition ()">gst_video_buffer_get_overlay_composition</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="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-buffer-set-overlay-composition" title="gst_video_buffer_set_overlay_composition ()">gst_video_buffer_set_overlay_composition</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="returnvalue">GstVideoOverlayRectangle</span></a> *
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-new-argb" title="gst_video_overlay_rectangle_new_argb ()">gst_video_overlay_rectangle_new_argb</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="returnvalue">GstVideoOverlayRectangle</span></a> *
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-ref" title="gst_video_overlay_rectangle_ref ()">gst_video_overlay_rectangle_ref</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="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-unref" title="gst_video_overlay_rectangle_unref ()">gst_video_overlay_rectangle_unref</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstBuffer.html#GstBuffer"><span class="returnvalue">GstBuffer</span></a> *
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-get-pixels-argb" title="gst_video_overlay_rectangle_get_pixels_argb ()">gst_video_overlay_rectangle_get_pixels_argb</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstBuffer.html#GstBuffer"><span class="returnvalue">GstBuffer</span></a> *
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-get-pixels-unscaled-argb" title="gst_video_overlay_rectangle_get_pixels_unscaled_argb ()">gst_video_overlay_rectangle_get_pixels_unscaled_argb</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-get-render-rectangle" title="gst_video_overlay_rectangle_get_render_rectangle ()">gst_video_overlay_rectangle_get_render_rectangle</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a>
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-get-seqnum" title="gst_video_overlay_rectangle_get_seqnum ()">gst_video_overlay_rectangle_get_seqnum</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="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-set-render-rectangle" title="gst_video_overlay_rectangle_set_render_rectangle ()">gst_video_overlay_rectangle_set_render_rectangle</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="returnvalue">GstVideoOverlayRectangle</span></a> *
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-copy" title="gst_video_overlay_rectangle_copy ()">gst_video_overlay_rectangle_copy</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-gstvideooverlaycomposition.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="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition">GstVideoOverlayComposition</a></td>
</tr>
<tr>
<td class="datatype_keyword"> </td>
<td class="function_name"><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayCompositionClass" title="GstVideoOverlayCompositionClass">GstVideoOverlayCompositionClass</a></td>
</tr>
<tr>
<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayFormatFlags" title="enum GstVideoOverlayFormatFlags">GstVideoOverlayFormatFlags</a></td>
</tr>
<tr>
<td class="datatype_keyword"> </td>
<td class="function_name"><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle">GstVideoOverlayRectangle</a></td>
</tr>
<tr>
<td class="datatype_keyword"> </td>
<td class="function_name"><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangleClass" title="GstVideoOverlayRectangleClass">GstVideoOverlayRectangleClass</a></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-gstvideooverlaycomposition.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="screen">
</pre>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-gstvideooverlaycomposition.includes"></a><h2>Includes</h2>
<pre class="synopsis">#include &lt;gst/video/video-overlay-composition.h&gt;
</pre>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-gstvideooverlaycomposition.description"></a><h2>Description</h2>
<div class="refsect2">
<a name="id-1.2.17.4.7.2"></a><p>
Functions to create and handle overlay compositions on video buffers.
</p>
<p>
An overlay composition describes one or more overlay rectangles to be
blended on top of a video buffer.
</p>
<p>
This API serves two main purposes:
</p>
<div class="itemizedlist">
<span class="type">GstOverlayComposition</span><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
it can be used to attach overlay information (subtitles or logos)
to non-raw video buffers such as GL/VAAPI/VDPAU surfaces. The actual
blending of the overlay can then be done by e.g. the video sink that
processes these non-raw buffers.
</li>
<li class="listitem">
it can also be used to blend overlay rectangles on top of raw video
buffers, thus consolidating blending functionality for raw video in
one place.
</li>
</ul>
</div>
<p>
</p>
</div>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-gstvideooverlaycomposition.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="gst-video-overlay-composition-new"></a><h3>gst_video_overlay_composition_new ()</h3>
<pre class="programlisting"><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="returnvalue">GstVideoOverlayComposition</span></a> *
gst_video_overlay_composition_new (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *rectangle</code></em>);</pre>
<p>Creates a new video overlay composition object to hold one or more
overlay rectangles.</p>
<div class="refsect3">
<a name="id-1.2.17.4.8.2.5"></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>rectangle</p></td>
<td class="parameter_description"><p> a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> to add to the
composition. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.17.4.8.2.6"></a><h4>Returns</h4>
<p> a new <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a>. Unref with
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-unref" title="gst_video_overlay_composition_unref ()"><code class="function">gst_video_overlay_composition_unref()</code></a> when no longer needed. </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 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-overlay-composition-ref"></a><h3>gst_video_overlay_composition_ref ()</h3>
<pre class="programlisting"><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="returnvalue">GstVideoOverlayComposition</span></a> *
gst_video_overlay_composition_ref (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> *comp</code></em>);</pre>
<p>Increases the refcount of the given composition by one.</p>
<p>Note that the refcount affects the writeability
of <em class="parameter"><code>comp</code></em>
, use <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-make-writable" title="gst_video_overlay_composition_make_writable ()"><code class="function">gst_video_overlay_composition_make_writable()</code></a> to ensure
a composition and its rectangles can be modified.</p>
<div class="refsect3">
<a name="id-1.2.17.4.8.3.6"></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>comp</p></td>
<td class="parameter_description"><p>a a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.17.4.8.3.7"></a><h4>Returns</h4>
<p> <em class="parameter"><code>comp</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 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-overlay-composition-unref"></a><h3>gst_video_overlay_composition_unref ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_video_overlay_composition_unref (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> *comp</code></em>);</pre>
<p>Decreases the refcount of the composition. If the refcount reaches 0, the
composition will be freed.</p>
<div class="refsect3">
<a name="id-1.2.17.4.8.4.5"></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>comp</p></td>
<td class="parameter_description"><p> a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td>
</tr></tbody>
</table></div>
</div>
<p class="since">Since 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-overlay-composition-add-rectangle"></a><h3>gst_video_overlay_composition_add_rectangle ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_video_overlay_composition_add_rectangle
                               (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> *comp</code></em>,
                                <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *rectangle</code></em>);</pre>
<p>Adds an overlay rectangle to an existing overlay composition object. This
must be done right after creating the overlay composition.</p>
<div class="refsect3">
<a name="id-1.2.17.4.8.5.5"></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>comp</p></td>
<td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>rectangle</p></td>
<td class="parameter_description"><p> a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> to add to the
composition. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-overlay-composition-n-rectangles"></a><h3>gst_video_overlay_composition_n_rectangles ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a>
gst_video_overlay_composition_n_rectangles
                               (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> *comp</code></em>);</pre>
<p>Returns the number of <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a>s contained in <em class="parameter"><code>comp</code></em>
.</p>
<div class="refsect3">
<a name="id-1.2.17.4.8.6.5"></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>comp</p></td>
<td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.17.4.8.6.6"></a><h4>Returns</h4>
<p> the number of rectangles</p>
<p></p>
</div>
<p class="since">Since 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-overlay-composition-get-rectangle"></a><h3>gst_video_overlay_composition_get_rectangle ()</h3>
<pre class="programlisting"><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="returnvalue">GstVideoOverlayRectangle</span></a> *
gst_video_overlay_composition_get_rectangle
                               (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> *comp</code></em>,
                                <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> n</code></em>);</pre>
<p>Returns the <em class="parameter"><code>n</code></em>
-th <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> contained in <em class="parameter"><code>comp</code></em>
.</p>
<div class="refsect3">
<a name="id-1.2.17.4.8.7.5"></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>comp</p></td>
<td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>n</p></td>
<td class="parameter_description"><p>number of the rectangle to get</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.17.4.8.7.6"></a><h4>Returns</h4>
<p> the <em class="parameter"><code>n</code></em>
-th rectangle, or NULL if <em class="parameter"><code>n</code></em>
is out of
bounds. Will not return a new reference, the caller will need to
obtain her own reference using <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-ref" title="gst_video_overlay_rectangle_ref ()"><code class="function">gst_video_overlay_rectangle_ref()</code></a>
if needed. </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 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-overlay-composition-get-seqnum"></a><h3>gst_video_overlay_composition_get_seqnum ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a>
gst_video_overlay_composition_get_seqnum
                               (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> *comp</code></em>);</pre>
<p>Returns the sequence number of this composition. Sequence numbers are
monotonically increasing and unique for overlay compositions and rectangles
(meaning there will never be a rectangle with the same sequence number as
a composition).</p>
<div class="refsect3">
<a name="id-1.2.17.4.8.8.5"></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>comp</p></td>
<td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.17.4.8.8.6"></a><h4>Returns</h4>
<p> the sequence number of <em class="parameter"><code>comp</code></em>
</p>
<p></p>
</div>
<p class="since">Since 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-overlay-composition-copy"></a><h3>gst_video_overlay_composition_copy ()</h3>
<pre class="programlisting"><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="returnvalue">GstVideoOverlayComposition</span></a> *
gst_video_overlay_composition_copy (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> *comp</code></em>);</pre>
<p>Makes a copy of <em class="parameter"><code>comp</code></em>
 and all contained rectangles, so that it is possible
to modify the composition and contained rectangles (e.g. add additional
rectangles or change the render co-ordinates or render dimension). The
actual overlay pixel data buffers contained in the rectangles are not
copied.</p>
<div class="refsect3">
<a name="id-1.2.17.4.8.9.5"></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>comp</p></td>
<td class="parameter_description"><p> a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> to copy. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.17.4.8.9.6"></a><h4>Returns</h4>
<p> a new <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> equivalent
to <em class="parameter"><code>comp</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 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-overlay-composition-make-writable"></a><h3>gst_video_overlay_composition_make_writable ()</h3>
<pre class="programlisting"><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="returnvalue">GstVideoOverlayComposition</span></a> *
gst_video_overlay_composition_make_writable
                               (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> *comp</code></em>);</pre>
<p>Takes ownership of <em class="parameter"><code>comp</code></em>
 and returns a version of <em class="parameter"><code>comp</code></em>
 that is writable
(i.e. can be modified). Will either return <em class="parameter"><code>comp</code></em>
 right away, or create a
new writable copy of <em class="parameter"><code>comp</code></em>
 and unref <em class="parameter"><code>comp</code></em>
 itself. All the contained
rectangles will also be copied, but the actual overlay pixel data buffers
contained in the rectangles are not copied.</p>
<div class="refsect3">
<a name="id-1.2.17.4.8.10.5"></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>comp</p></td>
<td class="parameter_description"><p> a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> to copy. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.17.4.8.10.6"></a><h4>Returns</h4>
<p> a writable <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a>
equivalent to <em class="parameter"><code>comp</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 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-overlay-composition-blend"></a><h3>gst_video_overlay_composition_blend ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_video_overlay_composition_blend (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> *comp</code></em>,
                                     <em class="parameter"><code><a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> *video_buf</code></em>);</pre>
<p>Blends the overlay rectangles in <em class="parameter"><code>comp</code></em>
 on top of the raw video data
contained in <em class="parameter"><code>video_buf</code></em>
. The data in <em class="parameter"><code>video_buf</code></em>
 must be writable. If
needed, use <a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstBuffer.html#gst-buffer-make-writable"><code class="function">gst_buffer_make_writable()</code></a> before calling this function to
ensure a buffer is writable. <em class="parameter"><code>video_buf</code></em>
 must also have valid raw video
caps set on it.</p>
<div class="refsect3">
<a name="id-1.2.17.4.8.11.5"></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>comp</p></td>
<td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>video_buf</p></td>
<td class="parameter_description"><p>a <a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> containing raw video data in a supported format</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-buffer-get-overlay-composition"></a><h3>gst_video_buffer_get_overlay_composition ()</h3>
<pre class="programlisting"><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="returnvalue">GstVideoOverlayComposition</span></a> *
gst_video_buffer_get_overlay_composition
                               (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> *buf</code></em>);</pre>
<p>Get the overlay composition that has previously been attached to a buffer
with <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-buffer-get-overlay-composition" title="gst_video_buffer_get_overlay_composition ()"><code class="function">gst_video_buffer_get_overlay_composition()</code></a>, usually by another element
upstream.</p>
<div class="refsect3">
<a name="id-1.2.17.4.8.12.5"></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>buf</p></td>
<td class="parameter_description"><p>a <a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.17.4.8.12.6"></a><h4>Returns</h4>
<p> the <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> attached to
this buffer, or NULL. Does not return a reference to the composition,
caller must obtain her own ref via <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-ref" title="gst_video_overlay_composition_ref ()"><code class="function">gst_video_overlay_composition_ref()</code></a>
if needed. </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 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-buffer-set-overlay-composition"></a><h3>gst_video_buffer_set_overlay_composition ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_video_buffer_set_overlay_composition
                               (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> *buf</code></em>,
                                <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> *comp</code></em>);</pre>
<p>Sets an overlay composition on a buffer. The buffer will obtain its own
reference to the composition, meaning this function does not take ownership
of <em class="parameter"><code>comp</code></em>
.</p>
<div class="refsect3">
<a name="id-1.2.17.4.8.13.5"></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>buf</p></td>
<td class="parameter_description"><p>a <a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>comp</p></td>
<td class="parameter_description"><p> a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a>, or NULL to clear a
previously-set composition. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-overlay-rectangle-new-argb"></a><h3>gst_video_overlay_rectangle_new_argb ()</h3>
<pre class="programlisting"><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="returnvalue">GstVideoOverlayRectangle</span></a> *
gst_video_overlay_rectangle_new_argb (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> *pixels</code></em>,
                                      <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> width</code></em>,
                                      <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> height</code></em>,
                                      <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> stride</code></em>,
                                      <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> render_x</code></em>,
                                      <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> render_y</code></em>,
                                      <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> render_width</code></em>,
                                      <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> render_height</code></em>,
                                      <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayFormatFlags" title="enum GstVideoOverlayFormatFlags"><span class="type">GstVideoOverlayFormatFlags</span></a> flags</code></em>);</pre>
<p>Creates a new video overlay rectangle with ARGB pixel data. The layout
of the components in memory is B-G-R-A on little-endian platforms
(corresponding to <a class="link" href="gst-plugins-base-libs-gstvideo.html#GST-VIDEO-FORMAT-BGRA:CAPS"><span class="type">GST_VIDEO_FORMAT_BGRA</span></a>) and A-R-G-B on big-endian
platforms (corresponding to <a class="link" href="gst-plugins-base-libs-gstvideo.html#GST-VIDEO-FORMAT-ARGB:CAPS"><span class="type">GST_VIDEO_FORMAT_ARGB</span></a>). In other words,
pixels are treated as 32-bit words and the lowest 8 bits then contain
the blue component value and the highest 8 bits contain the alpha
component value. The RGB values are non-premultiplied. This is the
format that is used by most hardware, and also many rendering libraries
such as Cairo, for example.</p>
<div class="refsect3">
<a name="id-1.2.17.4.8.14.5"></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>pixels</p></td>
<td class="parameter_description"><p> a <a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> pointing to the pixel memory. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>width</p></td>
<td class="parameter_description"><p>the width of the rectangle in <em class="parameter"><code>pixels</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>height</p></td>
<td class="parameter_description"><p>the height of the rectangle in <em class="parameter"><code>pixels</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>stride</p></td>
<td class="parameter_description"><p>the stride of the rectangle in <em class="parameter"><code>pixels</code></em>
in bytes (&gt;= 4*width)</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>x</p></td>
<td class="parameter_description"><p>the X co-ordinate on the video where the top-left corner of this
overlay rectangle should be rendered to</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>y</p></td>
<td class="parameter_description"><p>the Y co-ordinate on the video where the top-left corner of this
overlay rectangle should be rendered to</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>render_width</p></td>
<td class="parameter_description"><p>the render width of this rectangle on the video</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>render_height</p></td>
<td class="parameter_description"><p>the render height of this rectangle on the video</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>flags</p></td>
<td class="parameter_description"><p>flags (currently unused)</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.17.4.8.14.6"></a><h4>Returns</h4>
<p> a new <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a>. Unref with
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-unref" title="gst_video_overlay_rectangle_unref ()"><code class="function">gst_video_overlay_rectangle_unref()</code></a> when no longer needed. </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 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-overlay-rectangle-ref"></a><h3>gst_video_overlay_rectangle_ref ()</h3>
<pre class="programlisting"><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="returnvalue">GstVideoOverlayRectangle</span></a> *
gst_video_overlay_rectangle_ref (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *comp</code></em>);</pre>
<p>Increases the refcount of the given rectangle by one.</p>
<p>Note that the refcount affects the writeability
of <em class="parameter"><code>comp</code></em>
, use <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-copy" title="gst_video_overlay_rectangle_copy ()"><code class="function">gst_video_overlay_rectangle_copy()</code></a> to ensure a rectangle can
be modified (there is no <code class="function">gst_video_overlay_rectangle_make_writable()</code> because
it is unlikely that someone will hold the single reference to the rectangle
and not know that that's the case).</p>
<div class="refsect3">
<a name="id-1.2.17.4.8.15.6"></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>comp</p></td>
<td class="parameter_description"><p>a a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.17.4.8.15.7"></a><h4>Returns</h4>
<p> <em class="parameter"><code>comp</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 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-overlay-rectangle-unref"></a><h3>gst_video_overlay_rectangle_unref ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_video_overlay_rectangle_unref (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *comp</code></em>);</pre>
<p>Decreases the refcount of the rectangle. If the refcount reaches 0, the
rectangle will be freed.</p>
<div class="refsect3">
<a name="id-1.2.17.4.8.16.5"></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>comp</p></td>
<td class="parameter_description"><p> a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td>
</tr></tbody>
</table></div>
</div>
<p class="since">Since 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-overlay-rectangle-get-pixels-argb"></a><h3>gst_video_overlay_rectangle_get_pixels_argb ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstBuffer.html#GstBuffer"><span class="returnvalue">GstBuffer</span></a> *
gst_video_overlay_rectangle_get_pixels_argb
                               (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *rectangle</code></em>,
                                <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> *stride</code></em>,
                                <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayFormatFlags" title="enum GstVideoOverlayFormatFlags"><span class="type">GstVideoOverlayFormatFlags</span></a> flags</code></em>);</pre>
<div class="refsect3">
<a name="id-1.2.17.4.8.17.4"></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>rectangle</p></td>
<td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>stride</p></td>
<td class="parameter_description"><p> address of guint variable where to store the
row stride of the ARGB pixel data in the buffer. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>flags</p></td>
<td class="parameter_description"><p>flags (unused)</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.17.4.8.17.5"></a><h4>Returns</h4>
<p> a <a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> holding the ARGB pixel data with
row stride <em class="parameter"><code>stride</code></em>
and width and height of the render dimensions as per
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-get-render-rectangle" title="gst_video_overlay_rectangle_get_render_rectangle ()"><code class="function">gst_video_overlay_rectangle_get_render_rectangle()</code></a>. This function does
not return a reference, the caller should obtain a reference of her own
with <a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstBuffer.html#gst-buffer-ref"><code class="function">gst_buffer_ref()</code></a> if needed. </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 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-overlay-rectangle-get-pixels-unscaled-argb"></a><h3>gst_video_overlay_rectangle_get_pixels_unscaled_argb ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstBuffer.html#GstBuffer"><span class="returnvalue">GstBuffer</span></a> *
gst_video_overlay_rectangle_get_pixels_unscaled_argb
                               (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *rectangle</code></em>,
                                <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> *width</code></em>,
                                <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> *height</code></em>,
                                <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> *stride</code></em>,
                                <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayFormatFlags" title="enum GstVideoOverlayFormatFlags"><span class="type">GstVideoOverlayFormatFlags</span></a> flags</code></em>);</pre>
<p>Retrieves the pixel data as it is. This is useful if the caller can
do the scaling itself when handling the overlaying. The rectangle will
need to be scaled to the render dimensions, which can be retrieved using
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-rectangle-get-render-rectangle" title="gst_video_overlay_rectangle_get_render_rectangle ()"><code class="function">gst_video_overlay_rectangle_get_render_rectangle()</code></a>.</p>
<div class="refsect3">
<a name="id-1.2.17.4.8.18.5"></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>rectangle</p></td>
<td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>width</p></td>
<td class="parameter_description"><p> address where to store the width of the unscaled
rectangle in pixels. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>width</p></td>
<td class="parameter_description"><p> address where to store the height of the unscaled
rectangle in pixels. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>stride</p></td>
<td class="parameter_description"><p> address of guint variable where to store the row
stride of the ARGB pixel data in the buffer. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>flags</p></td>
<td class="parameter_description"><p>flags for future use (unused)</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.17.4.8.18.6"></a><h4>Returns</h4>
<p> a <a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> holding the ARGB pixel data with
row stride <em class="parameter"><code>stride</code></em>
. This function does not return a reference, the caller
should obtain a reference of her own with <a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstBuffer.html#gst-buffer-ref"><code class="function">gst_buffer_ref()</code></a> if needed. </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 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-overlay-rectangle-get-render-rectangle"></a><h3>gst_video_overlay_rectangle_get_render_rectangle ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_video_overlay_rectangle_get_render_rectangle
                               (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *rectangle</code></em>,
                                <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> *render_x</code></em>,
                                <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> *render_y</code></em>,
                                <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> *render_width</code></em>,
                                <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> *render_height</code></em>);</pre>
<p>Retrieves the render position and render dimension of the overlay
rectangle on the video.</p>
<div class="refsect3">
<a name="id-1.2.17.4.8.19.5"></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>rectangle</p></td>
<td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>render_x</p></td>
<td class="parameter_description"><p> address where to store the X render offset. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>render_y</p></td>
<td class="parameter_description"><p> address where to store the Y render offset. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>render_width</p></td>
<td class="parameter_description"><p> address where to store the render width. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>render_height</p></td>
<td class="parameter_description"><p> address where to store the render height. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.17.4.8.19.6"></a><h4>Returns</h4>
<p> TRUE if valid render dimensions were retrieved.</p>
<p></p>
</div>
<p class="since">Since 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-overlay-rectangle-get-seqnum"></a><h3>gst_video_overlay_rectangle_get_seqnum ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a>
gst_video_overlay_rectangle_get_seqnum
                               (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *rectangle</code></em>);</pre>
<p>Returns the sequence number of this rectangle. Sequence numbers are
monotonically increasing and unique for overlay compositions and rectangles
(meaning there will never be a rectangle with the same sequence number as
a composition).</p>
<div class="refsect3">
<a name="id-1.2.17.4.8.20.5"></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>rectangle</p></td>
<td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.17.4.8.20.6"></a><h4>Returns</h4>
<p> the sequence number of <em class="parameter"><code>rectangle</code></em>
</p>
<p></p>
</div>
<p class="since">Since 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-overlay-rectangle-set-render-rectangle"></a><h3>gst_video_overlay_rectangle_set_render_rectangle ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_video_overlay_rectangle_set_render_rectangle
                               (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *rectangle</code></em>,
                                <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> render_x</code></em>,
                                <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> render_y</code></em>,
                                <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> render_width</code></em>,
                                <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> render_height</code></em>);</pre>
<p>Sets the render position and dimensions of the rectangle on the video.
This function is mainly for elements that modify the size of the video
in some way (e.g. through scaling or cropping) and need to adjust the
details of any overlays to match the operation that changed the size.</p>
<p><em class="parameter"><code>rectangle</code></em>
 must be writable, meaning its refcount must be 1. You can
make the rectangles inside a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayComposition" title="GstVideoOverlayComposition"><span class="type">GstVideoOverlayComposition</span></a> writable using
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-make-writable" title="gst_video_overlay_composition_make_writable ()"><code class="function">gst_video_overlay_composition_make_writable()</code></a> or
<a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#gst-video-overlay-composition-copy" title="gst_video_overlay_composition_copy ()"><code class="function">gst_video_overlay_composition_copy()</code></a>.</p>
<div class="refsect3">
<a name="id-1.2.17.4.8.21.6"></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>rectangle</p></td>
<td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>render_x</p></td>
<td class="parameter_description"><p>render X position of rectangle on video</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>render_y</p></td>
<td class="parameter_description"><p>render Y position of rectangle on video</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>render_width</p></td>
<td class="parameter_description"><p>render width of rectangle</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>render_height</p></td>
<td class="parameter_description"><p>render height of rectangle</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-overlay-rectangle-copy"></a><h3>gst_video_overlay_rectangle_copy ()</h3>
<pre class="programlisting"><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="returnvalue">GstVideoOverlayRectangle</span></a> *
gst_video_overlay_rectangle_copy (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> *rectangle</code></em>);</pre>
<p>Makes a copy of <em class="parameter"><code>rectangle</code></em>
, so that it is possible to modify it
(e.g. to change the render co-ordinates or render dimension). The
actual overlay pixel data buffers contained in the rectangle are not
copied.</p>
<div class="refsect3">
<a name="id-1.2.17.4.8.22.5"></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>rectangle</p></td>
<td class="parameter_description"><p> a <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> to copy. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.17.4.8.22.6"></a><h4>Returns</h4>
<p> a new <a class="link" href="gst-plugins-base-libs-gstvideooverlaycomposition.html#GstVideoOverlayRectangle" title="GstVideoOverlayRectangle"><span class="type">GstVideoOverlayRectangle</span></a> equivalent
to <em class="parameter"><code>rectangle</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 0.10.36</p>
</div>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-gstvideooverlaycomposition.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="GstVideoOverlayComposition"></a><h3>GstVideoOverlayComposition</h3>
<pre class="programlisting">typedef struct _GstVideoOverlayComposition GstVideoOverlayComposition;</pre>
<p>An opaque video overlay composition object. A composition contains
multiple overlay rectangles.</p>
<p class="since">Since 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="GstVideoOverlayCompositionClass"></a><h3>GstVideoOverlayCompositionClass</h3>
<pre class="programlisting">typedef struct _GstVideoOverlayCompositionClass GstVideoOverlayCompositionClass;</pre>
</div>
<hr>
<div class="refsect2">
<a name="GstVideoOverlayFormatFlags"></a><h3>enum GstVideoOverlayFormatFlags</h3>
<p>Overlay format flags.</p>
<div class="refsect3">
<a name="id-1.2.17.4.9.4.4"></a><h4>Members</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
<col width="200px" class="enum_members_annotations">
</colgroup>
<tbody><tr>
<td class="enum_member_name"><p><a name="GST-VIDEO-OVERLAY-FORMAT-FLAG-NONE:CAPS"></a>GST_VIDEO_OVERLAY_FORMAT_FLAG_NONE</p></td>
<td class="enum_member_description">
<p>no flags</p>
</td>
<td class="enum_member_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<p class="since">Since 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="GstVideoOverlayRectangle"></a><h3>GstVideoOverlayRectangle</h3>
<pre class="programlisting">typedef struct _GstVideoOverlayRectangle GstVideoOverlayRectangle;</pre>
<p>An opaque video overlay rectangle object. A rectangle contains a single
overlay rectangle which can be added to a composition.</p>
<p class="since">Since 0.10.36</p>
</div>
<hr>
<div class="refsect2">
<a name="GstVideoOverlayRectangleClass"></a><h3>GstVideoOverlayRectangleClass</h3>
<pre class="programlisting">typedef struct _GstVideoOverlayRectangleClass GstVideoOverlayRectangleClass;</pre>
</div>
</div>
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