atk/LICENSE.txt

## README.md

      
    Raw
  

              README.md
            
          
    canvas tool

Will iterate a command array to run each command on an canvas 2d context.
Usage

fn(canvas node, commands, commandmap)
commandmap = 'beginPath0closePath0moveTo0lineTo0quadraticCurveTo0bezierCurveTo0arcTo0rect0arc0fill0fillRect0stroke0clip0fillText0strokeText0measureText0drawImage0createImageData'.split(0);
Commands can be issued either as long or short commands. Long commands are strings to be evaluated within the Canvas 2d context's scope, while short commands are arrays with the command number and the other arguments in order.
Short Command numbers:

0 = beginPath
1 = closePath
2 = moveTo
3 = lineTo
4 = quadraticCurveTo
5 = bezierCurveTo
6 = arcTo
7 = rect
8 = arc
9 = fill
10 = fillRect
11 = stroke
12 = clip
13 = fillText
14 = strokeText
15 = measureText
16 = drawImage
17 = createImageData

This was done so we could render the logo of the 140byt.es homepage in canvas with a script that's smaller than 140bytes :)
Nevertheless, since we wanted to use as few external data as possible, we reduced this to a tool that only executed strings in the Canvas 2d-context and rendered bezierCurves:
function(a,b,c,d){a=a.getContext('2d');for(c in b)d=b[c],eval('with(a){'+(''+d!==d?((d[2]?'bezierCurveTo(':'moveTo(')+d+')'):d)+'}')}

  
## annotated.js
function(
  a, // canvas node
  b, // commands array
  c, // command map
  d, // placeholder
  e  // counter
){
  for(
    // get 2d canvas context, initialize counter
    a=a.getContext('2d'), e=0;
    // get next command
    d=b[e++];
  )
    // long (string) or short (array) command?
    '' + d === d ?
      // string = evaluate long command in the scope of the context
      eval('with(a){' + d + '}') :
      // array = apply arguments to short command (get name from command map)
      a[c[d[0]]].apply(a, d.slice(1))
}

## index.js
function(a,b,c,d,e){for(a=a.getContext('2d'),e=0;d=b[e++];)''+d===d?eval('with(a){'+d+'}'):a[c[d[0]]].apply(a,d.slice(1))}

## LICENSE.txt
            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
                    Version 2, December 2004

 Copyright (C) 2011 Alex Kloss <alexthkloss@web.de>

 Everyone is permitted to copy and distribute verbatim or modified
 copies of this license document, and changing it is allowed as long
 as the name is changed.

            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

  0. You just DO WHAT THE FUCK YOU WANT TO.

## package.json
{
  "name": "canvasTool",

  "description": "Tool to do about everything that's possible in canvas using a small data format",

  "keywords": [
    "html5",
    "canvas",
    "2d",
    "drawing"
  ]
}

## test.html
<!DOCTYPE html>
<title>Foo</title>
<canvas id="ret"></canvas>
<div>Expected result: a red triangle</div>
<script>
  // write a small example that shows off the API for your example
  // and tests it in one fell swoop.

  var myFunction = function(a,b,c,d,e){for(a=a.getContext('2d'),e=0;d=b[e++];)''+d===d?eval('with(a){'+d+'}'):a[c[d[0]]].apply(a,d.slice(1))},
      commandmap = 'beginPath0closePath0moveTo0lineTo0quadraticCurveTo0bezierCurveTo0arcTo0rect0arc0fill0fillRect0stroke0clip0fillText0strokeText0measureText0drawImage0createImageData'.split(0),
      testdata = ['canvas.width=canvas.height=150;fillStyle="#f00"',[0],[3,100,10],[3,0,100],[3,15,15],[1],[9]];

  myFunction(document.getElementById('test'), testdata, commandmap);
</script>
<div>Expected Result: white on black 140byt.es logo</div>
<canvas id="logocanvas"></canvas>
<script>
var Canvas = document.getElementById('logocanvas'),
logo=['canvas.width=200;canvas.height=32',[6,10],[8,10,11,10,11,16],[11,18,11,19,11,20],[23,10],[23,10.6,23,11.4,23,12],[23,18,33,18,33,12],[33,10],[33,12,33,18,33,20],[50,10],[43.6,10,43.6,20,50,20],[56.4,20,56.4,10,50,10],[67,6],[67,8,67,12,67,15],[67,22,77,22,77,15],[77,12,74,10,72,10],[69,10,68,10,67,10],[89,10],[89,11,89,12,89,13],[89,23,101,23,101,13],[101,13,101,12,101,10],[95,21],[95,22,95,23,95,26],[113,6],[113,8,113,10,113,12],[112.8,19.6,115,20.4,120,20],[115,10],[116,10,118,10,120,10],[132,20],[132,20,132,20,132,20],[154,14],[153,8,145,8,144,14],[144,21,150,20.2,154,20],[176,9],[165.8,8.6,166.6,12,166,12],[166,20],[176.2,20.6,175.4,18,176,18],'lineCap="round";strokeStyle="#000";lineWidth=11;stroke();strokeStyle="#fff";lineWidth=4.2;stroke()'],
logoFunc = function(a,b,c,d){a=a.getContext('2d');for(c in b)d=b[c],''+d===d?eval('with(a){'+d+'}'):a[d[2]?'bezierCurveTo':'moveTo'].apply(a,d)};
logoFunc(Canvas, logo);
</script>
	function(
	a, // canvas node
	b, // commands array
	c, // command map
	d, // placeholder
	e // counter
	){
	for(
	// get 2d canvas context, initialize counter
	a=a.getContext('2d'), e=0;
	// get next command
	d=b[e++];
	)
	// long (string) or short (array) command?
	'' + d === d ?
	// string = evaluate long command in the scope of the context
	eval('with(a){' + d + '}') :
	// array = apply arguments to short command (get name from command map)
	a[c[d[0]]].apply(a, d.slice(1))
	}
	DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
	Version 2, December 2004

	Copyright (C) 2011 Alex Kloss <alexthkloss@web.de>

	Everyone is permitted to copy and distribute verbatim or modified
	copies of this license document, and changing it is allowed as long
	as the name is changed.

	DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
	TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

	0. You just DO WHAT THE FUCK YOU WANT TO.
	{
	"name": "canvasTool",

	"description": "Tool to do about everything that's possible in canvas using a small data format",

	"keywords": [
	"html5",
	"canvas",
	"2d",
	"drawing"
	]
	}
	<!DOCTYPE html>
	<title>Foo</title>
	<canvas id="ret"></canvas>
	<div>Expected result: a red triangle</div>
	<script>
	// write a small example that shows off the API for your example
	// and tests it in one fell swoop.

	var myFunction = function(a,b,c,d,e){for(a=a.getContext('2d'),e=0;d=b[e++];)''+d===d?eval('with(a){'+d+'}'):a[c[d[0]]].apply(a,d.slice(1))},
	commandmap = 'beginPath0closePath0moveTo0lineTo0quadraticCurveTo0bezierCurveTo0arcTo0rect0arc0fill0fillRect0stroke0clip0fillText0strokeText0measureText0drawImage0createImageData'.split(0),
	testdata = ['canvas.width=canvas.height=150;fillStyle="#f00"',[0],[3,100,10],[3,0,100],[3,15,15],[1],[9]];

	myFunction(document.getElementById('test'), testdata, commandmap);
	</script>
	<div>Expected Result: white on black 140byt.es logo</div>
	<canvas id="logocanvas"></canvas>
	<script>
	var Canvas = document.getElementById('logocanvas'),
	logo=['canvas.width=200;canvas.height=32',[6,10],[8,10,11,10,11,16],[11,18,11,19,11,20],[23,10],[23,10.6,23,11.4,23,12],[23,18,33,18,33,12],[33,10],[33,12,33,18,33,20],[50,10],[43.6,10,43.6,20,50,20],[56.4,20,56.4,10,50,10],[67,6],[67,8,67,12,67,15],[67,22,77,22,77,15],[77,12,74,10,72,10],[69,10,68,10,67,10],[89,10],[89,11,89,12,89,13],[89,23,101,23,101,13],[101,13,101,12,101,10],[95,21],[95,22,95,23,95,26],[113,6],[113,8,113,10,113,12],[112.8,19.6,115,20.4,120,20],[115,10],[116,10,118,10,120,10],[132,20],[132,20,132,20,132,20],[154,14],[153,8,145,8,144,14],[144,21,150,20.2,154,20],[176,9],[165.8,8.6,166.6,12,166,12],[166,20],[176.2,20.6,175.4,18,176,18],'lineCap="round";strokeStyle="#000";lineWidth=11;stroke();strokeStyle="#fff";lineWidth=4.2;stroke()'],
	logoFunc = function(a,b,c,d){a=a.getContext('2d');for(c in b)d=b[c],''+d===d?eval('with(a){'+d+'}'):a[d[2]?'bezierCurveTo':'moveTo'].apply(a,d)};
	logoFunc(Canvas, logo);
	</script>