<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>imagecreate</title>
<link rel="stylesheet" type="text/css" href="csound.css" />
<meta name="generator" content="DocBook XSL Stylesheets V1.76.1" />
<link rel="home" href="index.html" title="The Canonical Csound Reference Manual" />
<link rel="up" href="OpcodesTop.html" title="Orchestra Opcodes and Operators" />
<link rel="prev" href="ihold.html" title="ihold" />
<link rel="next" href="imagefree.html" title="imagefree" />
</head>
<body>
<div class="navheader">
<table width="100%" summary="Navigation header">
<tr>
<th colspan="3" align="center">imagecreate</th>
</tr>
<tr>
<td width="20%" align="left"><a accesskey="p" href="ihold.html">Prev</a> </td>
<th width="60%" align="center">Orchestra Opcodes and Operators</th>
<td width="20%" align="right"> <a accesskey="n" href="imagefree.html">Next</a></td>
</tr>
</table>
<hr />
</div>
<div class="refentry" title="imagecreate">
<a id="imagecreate"></a>
<div class="titlepage"></div>
<a id="IndexImagecreate" class="indexterm"></a>
<div class="refnamediv">
<h2>
<span class="refentrytitle">imagecreate</span>
</h2>
<p>imagecreate —
Create an empty image of a given size.
</p>
</div>
<div class="refsect1" title="Description">
<a id="idp26572688"></a>
<h2>Description</h2>
<p>
Create an empty image of a given size. Individual pixel values can then be set with. <a class="link" href="imagesetpixel.html" title="imagesetpixel"><em class="citetitle">imagegetpixel</em></a>.
</p>
</div>
<div class="refsect1" title="Syntax">
<a id="idp26638152"></a>
<h2>Syntax</h2>
<pre class="synopsis">iimagenum <span class="command"><strong>imagecreate</strong></span> iwidth, iheight</pre>
</div>
<div class="refsect1" title="Initialization">
<a id="idp26639288"></a>
<h2>Initialization</h2>
<p>
<span class="emphasis"><em>iimagenum</em></span> -- number assigned to the created image.
</p>
<p>
<span class="emphasis"><em>iwidth</em></span> -- desired image width.
</p>
<p>
<span class="emphasis"><em>iheight</em></span> -- desired image height.
</p>
</div>
<div class="refsect1" title="Examples">
<a id="idp26641160"></a>
<h2>Examples</h2>
<p>
Here is an example of the imagecreate opcode. It uses the file <a class="ulink" href="examples/imageopcodes.csd" target="_top"><em class="citetitle">imageopcodes.csd</em></a>.
</p>
<div class="example">
<a id="idp26642160"></a>
<p class="title">
<strong>Example 355. Example of the imageload opcode.</strong>
</p>
<div class="example-contents">
<pre class="programlisting">
<span class="csdtag"><CsoundSynthesizer></span>
<span class="csdtag"><CsOptions></span>
<span class="comment">; Select audio/midi flags here according to platform</span>
-n <span class="comment">;no sound output</span>
<span class="csdtag"></CsOptions></span>
<span class="csdtag"><CsInstruments></span>
<span class="ohdr">sr</span><span class="op">=</span>48000
<span class="ohdr">ksmps</span><span class="op">=</span>1
<span class="ohdr">nchnls</span><span class="op">=</span>2
<span class="comment">; this test .csd copies image.png into a new file 'imageout.png'</span>
giimage1 <span class="opc">imageload</span> "image.png"
giimagew, giimageh <span class="opc">imagesize</span> giimage1
giimage2 <span class="opc">imagecreate</span> giimagew,giimageh
<span class="oblock">instr</span> 1
kndx <span class="op">=</span> 0
kx_ <span class="opc">linseg</span> 0, p3, 1
<span class="comment">;print imagewidth and imageheigth of image.png</span>
<span class="opc">prints</span> "imagewidth <span class="op">=</span> <span class="op">%</span>f pixels, imageheigth <span class="op">=</span> <span class="op">%</span>f pixels\\n", giimagew, giimageh
<span class="olabel">myloop</span><span class="op">:</span>
ky_ <span class="op">=</span> kndx<span class="op">/</span>(giimageh)
kr_, kg_, kb_ <span class="opc">imagegetpixel</span> giimage1, kx_, ky_
<span class="opc">imagesetpixel</span> giimage2, kx_, ky_, kr_, kg_, kb_
<span class="octrl">loop_lt</span> kndx, 0.5, giimageh, <span class="olabel">myloop</span>
<span class="oblock">endin</span>
<span class="oblock">instr</span> 2
<span class="opc">imagesave</span> giimage2, "imageout.png"
<span class="oblock">endin</span>
<span class="oblock">instr</span> 3
<span class="opc">imagefree</span> giimage1
<span class="opc">imagefree</span> giimage2
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="stamnt">i</span>1 1 1
<span class="stamnt">i</span>2 2 1
<span class="stamnt">i</span>3 3 1
<span class="stamnt">e</span>
<span class="csdtag"></CsScore></span>
<span class="csdtag"></CsoundSynthesizer></span>
</pre>
</div>
</div>
<p><br class="example-break" />
</p>
</div>
<div class="refsect1" title="See Also">
<a id="idp26643176"></a>
<h2>See Also</h2>
<p>
<a class="link" href="imageload.html" title="imageload"><em class="citetitle">imageload</em></a>,
<a class="link" href="imagesize.html" title="imagesize"><em class="citetitle">imagesize</em></a>,
<a class="link" href="imagesave.html" title="imagesave"><em class="citetitle">imagesave</em></a>,
<a class="link" href="imagegetpixel.html" title="imagegetpixel"><em class="citetitle">imagegetpixel</em></a>,
<a class="link" href="imagesetpixel.html" title="imagesetpixel"><em class="citetitle">imagesetpixel</em></a>,
<a class="link" href="imagefree.html" title="imagefree"><em class="citetitle">imagefree</em></a>
</p>
</div>
<div class="refsect1" title="Credits">
<a id="idp26646712"></a>
<h2>Credits</h2>
<p>
</p>
<table border="0" summary="Simple list" class="simplelist">
<tr>
<td>Author: Cesare Marilungo</td>
</tr>
</table>
<p>
</p>
<p>New in version 5.08</p>
</div>
</div>
<div class="navfooter">
<hr />
<table width="100%" summary="Navigation footer">
<tr>
<td width="40%" align="left"><a accesskey="p" href="ihold.html">Prev</a> </td>
<td width="20%" align="center">
<a accesskey="u" href="OpcodesTop.html">Up</a>
</td>
<td width="40%" align="right"> <a accesskey="n" href="imagefree.html">Next</a></td>
</tr>
<tr>
<td width="40%" align="left" valign="top">ihold </td>
<td width="20%" align="center">
<a accesskey="h" href="index.html">Home</a>
</td>
<td width="40%" align="right" valign="top"> imagefree</td>
</tr>
</table>
</div>
</body>
</html>
distrib
>
Mageia
>
5
>
x86_64
>
media
>
core-release
>
by-pkgid
>
b707d9a4ee443103660a75ccb6e51334
>
files
>
1815
