Blinker

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Stefan Schuermans authored 13 years ago

 
1) <html>
2)   <head>
3)     <title>Blinker - Canvas</title>
4)   </head>
5)   <body>
6)     <h1>Blinker - Canvas</h1>
7)     <p>
8)       The canvas module allows to merge several streams into one.
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9)       It works like a canvas, onto which rectangular sections of
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Stefan Schuermans authored 13 years ago

 
10)       different streams are drawn.
11)       The result obtained on the canvas is then sent to a single output
12)       stream.
13)     </p>
14)     <h2>Configuration</h2>
15)     <p>
16)       The configuration of the canvas module with name <code>NAME</code>
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17)       is located in the <code>canvases/NAME</code> subdirectory.
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Stefan Schuermans authored 13 years ago

 
18)     </p>
19)     <h3>Format</h3>
20)     <p>
21)       The file <code>format</code> describes the format of the canvas,
22)       i.e. its dimensions, the number of channels and the color depth on
23)       each channel.
24)       The file must contain a string
25)       <code>&lt;width&gt;x&lt;height&gt;-&lt;channels&gt;/&lt;colors&gt;</code>,
26)       e.g. <code>18x8-1/256</code> for 18 pixels width, 8 pixels height
27)       in 256 grayscales.
28)     </p>
29)     <h3>Input List</h3>
30)     <p>
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31)       The inputs to be drawn onto the canvas are configured in the
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32)       <code>inputs</code> subdirectory.
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33)       Each input is configured in an own subdirectory in <code>inputs</code>.
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34)       E.g. the configurations for inputs with names <code>top</code>
35)       and <code>bottom</code> reside in subdirectories <code>inputs/top</code>
36)       and <code>inputs/bottom</code> respectively.
37)       All inputs are drawn to the canvas in alphanumerical order, i.e.
38)       <code>top</code> is painted over <code>bottom</code> on overlapping
39)       pixels.
40)     </p>
41)     <p>
42)       The configuration inside an input subdirectory consists of the following
43)       settings:
44)     </p>
45)     <h4>Input Stream</h4>
46)     <p>
47)       The file <code>instream</code> contains the name of the stream to
48)       read for this input.
49)     </p>
50)     <h4>Source Position</h4>
51)     <p>
52)       The file <code>srcpos</code> defines the top-left corner of the
53)       recangular section to be taken from the stream.
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54)       The file must contain a string <code>&lt;x&gt;,&lt;y&gt;</code>.
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55)     </p>
56)     <h4>Size</h4>
57)     <p>
58)       The file <code>size</code> defines the size of the
59)       recangular section to be taken from the stream.
60)       The file must contain a string <code>&lt;width&gt;x&lt;height&gt;</code>.
61)     </p>
62)     <h4>Destination Position</h4>
63)     <p>
64)       The file <code>destpos</code> defines the top-left corner of the
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65)       rectangular section on the canvas to draw to.
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66)       The file must contain a string <code>&lt;x&gt;,&lt;y&gt;</code>.