1<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 2<html> 3<head> 4<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 5<title>gltransformation: GStreamer Base Plugins 1.0 Plugins Reference Manual</title> 6<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> 7<link rel="home" href="index.html" title="GStreamer Base Plugins 1.0 Plugins Reference Manual"> 8<link rel="up" href="ch01.html" title="gst-plugins-base Elements"> 9<link rel="prev" href="gst-plugins-base-plugins-gltestsrc.html" title="gltestsrc"> 10<link rel="next" href="gst-plugins-base-plugins-glupload.html" title="glupload"> 11<meta name="generator" content="GTK-Doc V1.28 (XML mode)"> 12<link rel="stylesheet" href="style.css" type="text/css"> 13</head> 14<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 15<table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="5"><tr valign="middle"> 16<td width="100%" align="left" class="shortcuts"> 17<a href="#" class="shortcut">Top</a><span id="nav_description"> <span class="dim">|</span> 18 <a href="#gst-plugins-base-plugins-gltransformation.description" class="shortcut">Description</a></span> 19</td> 20<td><a accesskey="h" href="index.html"><img src="home.png" width="16" height="16" border="0" alt="Home"></a></td> 21<td><a accesskey="u" href="ch01.html"><img src="up.png" width="16" height="16" border="0" alt="Up"></a></td> 22<td><a accesskey="p" href="gst-plugins-base-plugins-gltestsrc.html"><img src="left.png" width="16" height="16" border="0" alt="Prev"></a></td> 23<td><a accesskey="n" href="gst-plugins-base-plugins-glupload.html"><img src="right.png" width="16" height="16" border="0" alt="Next"></a></td> 24</tr></table> 25<div class="refentry"> 26<a name="gst-plugins-base-plugins-gltransformation"></a><div class="titlepage"></div> 27<div class="refnamediv"><table width="100%"><tr> 28<td valign="top"> 29<h2><span class="refentrytitle"><a name="gst-plugins-base-plugins-gltransformation.top_of_page"></a>gltransformation</span></h2> 30<p>gltransformation</p> 31</td> 32<td class="gallery_image" valign="top" align="right"></td> 33</tr></table></div> 34<div class="refsect1"> 35<a name="gst-plugins-base-plugins-gltransformation.other"></a><h2>Types and Values</h2> 36<div class="informaltable"><table class="informaltable" width="100%" border="0"> 37<colgroup> 38<col width="150px" class="name"> 39<col class="description"> 40</colgroup> 41<tbody><tr> 42<td class="datatype_keyword">struct</td> 43<td class="function_name"><a class="link" href="gst-plugins-base-plugins-gltransformation.html#GstGLTransformation" title="struct GstGLTransformation">GstGLTransformation</a></td> 44</tr></tbody> 45</table></div> 46</div> 47<div class="refsect1"> 48<a name="gst-plugins-base-plugins-gltransformation.description"></a><h2>Description</h2> 49<p>Transforms video on the GPU.</p> 50<div class="refsect3"> 51<a name="id-1.2.65.4.3"></a><h4>Examples</h4> 52<div class="informalexample"> 53 <table class="listing_frame" border="0" cellpadding="0" cellspacing="0"> 54 <tbody> 55 <tr> 56 <td class="listing_lines" align="right"><pre>1</pre></td> 57 <td class="listing_code"><pre class="programlisting">gst<span class="gtkdoc opt">-</span>launch<span class="gtkdoc opt">-</span><span class="number">1.0</span> gltestsrc <span class="gtkdoc opt">!</span> gltransformation rotation<span class="gtkdoc opt">-</span>z<span class="gtkdoc opt">=</span><span class="number">45</span> <span class="gtkdoc opt">!</span> glimagesink</pre></td> 58 </tr> 59 </tbody> 60 </table> 61</div> 62 63<p> A pipeline to rotate by 45 degrees</p> 64<div class="informalexample"> 65 <table class="listing_frame" border="0" cellpadding="0" cellspacing="0"> 66 <tbody> 67 <tr> 68 <td class="listing_lines" align="right"><pre>1</pre></td> 69 <td class="listing_code"><pre class="programlisting">gst<span class="gtkdoc opt">-</span>launch<span class="gtkdoc opt">-</span><span class="number">1.0</span> gltestsrc <span class="gtkdoc opt">!</span> gltransformation translation<span class="gtkdoc opt">-</span>x<span class="gtkdoc opt">=</span><span class="number">0.5</span> <span class="gtkdoc opt">!</span> glimagesink</pre></td> 70 </tr> 71 </tbody> 72 </table> 73</div> 74 75<p> Translate the video by 0.5</p> 76<div class="informalexample"> 77 <table class="listing_frame" border="0" cellpadding="0" cellspacing="0"> 78 <tbody> 79 <tr> 80 <td class="listing_lines" align="right"><pre>1</pre></td> 81 <td class="listing_code"><pre class="programlisting">gst<span class="gtkdoc opt">-</span>launch<span class="gtkdoc opt">-</span><span class="number">1.0</span> gltestsrc <span class="gtkdoc opt">!</span> gltransformation scale<span class="gtkdoc opt">-</span>y<span class="gtkdoc opt">=</span><span class="number">0.5</span> scale<span class="gtkdoc opt">-</span>x<span class="gtkdoc opt">=</span><span class="number">0.5</span> <span class="gtkdoc opt">!</span> glimagesink</pre></td> 82 </tr> 83 </tbody> 84 </table> 85</div> 86 87<p> Resize the video by 0.5</p> 88<div class="informalexample"> 89 <table class="listing_frame" border="0" cellpadding="0" cellspacing="0"> 90 <tbody> 91 <tr> 92 <td class="listing_lines" align="right"><pre>1</pre></td> 93 <td class="listing_code"><pre class="programlisting">gst<span class="gtkdoc opt">-</span>launch<span class="gtkdoc opt">-</span><span class="number">1.0</span> gltestsrc <span class="gtkdoc opt">!</span> gltransformation rotation<span class="gtkdoc opt">-</span>x<span class="gtkdoc opt">=-</span><span class="number">45</span> ortho<span class="gtkdoc opt">=</span>True <span class="gtkdoc opt">!</span> glimagesink</pre></td> 94 </tr> 95 </tbody> 96 </table> 97</div> 98 99<p> Rotate the video around the X-Axis by -45° with an orthographic projection</p> 100</div> 101</div> 102<div class="refsect1"> 103<a name="gst-plugins-base-plugins-gltransformation.functions_details"></a><h2>Functions</h2> 104<p></p> 105</div> 106<div class="refsect1"> 107<a name="gst-plugins-base-plugins-gltransformation.other_details"></a><h2>Types and Values</h2> 108<div class="refsect2"> 109<a name="GstGLTransformation"></a><h3>struct GstGLTransformation</h3> 110<pre class="programlisting">struct GstGLTransformation { 111 GstGLFilter filter; 112 113 GstGLShader *shader; 114 GLuint vao; 115 GLuint vbo_indices; 116 GLuint vertex_buffer; 117 GLint attr_position; 118 GLint attr_texture; 119 120 GstGLMemory *in_tex; 121 GstGLMemory *out_tex; 122 123 gfloat xrotation; 124 gfloat yrotation; 125 gfloat zrotation; 126 127 gfloat xscale; 128 gfloat yscale; 129 130 gfloat xtranslation; 131 gfloat ytranslation; 132 gfloat ztranslation; 133 134 gfloat xpivot; 135 gfloat ypivot; 136 gfloat zpivot; 137 138 /* perspective */ 139 gfloat fov; 140 gfloat aspect; 141 gfloat znear; 142 gfloat zfar; 143 gboolean ortho; 144 145 graphene_matrix_t model_matrix; 146 graphene_matrix_t view_matrix; 147 graphene_matrix_t projection_matrix; 148 graphene_matrix_t inv_model_matrix; 149 graphene_matrix_t inv_view_matrix; 150 graphene_matrix_t inv_projection_matrix; 151 graphene_matrix_t mvp_matrix; 152 153 graphene_vec3_t camera_position; 154 155 gboolean downstream_supports_affine_meta; 156 gboolean caps_change; 157}; 158</pre> 159</div> 160</div> 161</div> 162<div class="footer"> 163<hr>Generated by GTK-Doc V1.28</div> 164</body> 165</html>
