<html><head><title>Blinker - Canvas</title></head><body><h1>Blinker - Canvas</h1><p>The canvas module allows to merge several streams into one.It works like a canvas, onto which rectangular sections ofdifferent streams are drawn.The result obtained on the canvas is then sent to a single outputstream.</p><h2>Configuration</h2><p>The configuration of the canvas module with name <code>NAME</code>is located in the <code>canvases/NAME</code> subdirectory.</p><h3>Format</h3><p>The file <code>format</code> describes the format of the canvas,i.e. its dimensions, the number of channels and the color depth oneach channel.The file must contain a string<code><width>x<height>-<channels>/<colors></code>,e.g. <code>18x8-1/256</code> for 18 pixels width, 8 pixels heightin 256 grayscales.</p><h3>Input List</h3><p>The inputs to be drawn onto the canvas are configured in the<code>inputs</code> subdirectory.Each input is configured in an own subdirectory in <code>inputs</code>.E.g. the configurations for inputs with names <code>top</code>and <code>bottom</code> reside in subdirectories <code>inputs/top</code>and <code>inputs/bottom</code> respectively.All inputs are drawn to the canvas in alphanumerical order, i.e.<code>top</code> is painted over <code>bottom</code> on overlappingpixels.</p><p>The configuration inside an input subdirectory consists of the followingsettings:</p><h4>Input Stream</h4><p>The file <code>instream</code> contains the name of the stream toread for this input.</p><h4>Source Position</h4><p>