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canvas-cheatsheet.html
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<!doctype html>
<title>HTML5 Canvas Cheat Sheet</title>
<style>
html { font-size:smaller; font-family:sans-serif; background-color:white; color:black }
header { display:block }
h1 span { font-size:60% }
header p { float:right; font-size:larger }
article { display:block; -webkit-column-width:30em; -moz-column-width:30em; column-width:30em }
h2 { margin-bottom:0; background-color:black; color:white }
h3 { margin-bottom:0; background-color:lightgray }
table { width:100%; border-collapse:collapse }
th, td { padding:0 1em 0 0 }
th { text-align:left; font-weight:normal; color:gray }
th:first-child { width:7em }
th:first-child + th + th { width:40% }
td { vertical-align:top }
ul { margin-top:0; margin-bottom:0; padding-left:0; list-style-type:none }
li { float:left; text-align:center; padding-right:1em }
figure { display:block; margin-left:0; margin-right:0 }
canvas { display:block; margin-left:1em; margin-right:1em }
p { margin-top:0; margin-bottom:0 }
[colspan] { padding-left:1em; color:gray }
footer { display:block; margin-top:2em; font-style:italic }
</style>
<header>
<p><a href="http://blog.nihilogic.dk/">http://blog.nihilogic.dk/</a>
<h1>HTML5 Canvas Cheat Sheet <span>v1.x</span></h1>
</header>
<article>
<h2>Canvas element</h2>
<h3>Attributes</h3>
<table>
<tr>
<th>Name
<th>Type
<th>Default
<tr>
<td><b>width</b>
<td><i>unsigned long</i>
<td>300
<tr>
<td><b>height</b>
<td><i>unsigned long</i>
<td>150
</table>
<h3>Methods</h3>
<table>
<tr>
<th>Return
<th>Name
<tr>
<td><i>string</i>
<td><b>toDataURL</b>([Optional] <i>string</i> <b>type</b>, [Variadic] <i>any</i> <b>args</b>)
<tr>
<td><i>Object</i>
<td><b>getContext</b>(<i>string</i> <b>contextId</b>)
</table>
<h2>2D Context</h2>
<h3>Attributes</h3>
<table>
<tr>
<th>Name
<th>Type
<th>Default
<tr>
<td><b>canvas</b>
<td><i>HTMLCanvasObject</i>
<td>[readonly]
</table>
<h3>Methods</h3>
<table>
<tr>
<th>Return
<th>Name
<tr>
<td><i>void</i>
<td><b>save</b>()
<tr>
<td><i>void</i>
<td><b>restore</b>()
</table>
<h2>Transformation</h2>
<h3>Methods</h3>
<table>
<tr>
<th>Return
<th>Name
<tr>
<td><i>void</i>
<td><b>scale</b>(<i>float</i> <b>x</b>, <i>float</i> <b>y</b>)
<tr>
<td><i>void</i>
<td><b>rotate</b>(<i>float</i> <b>angle</b>)
<tr>
<td><i>void</i>
<td><b>translate</b>(<i>float</i> <b>x</b>, <i>float</i> <b>y</b>)
<tr>
<td><i>void</i>
<td><b>transform</b>(<i>float</i> <b>m11</b>, <i>float</i> <b>m12</b>, <i>float</i> <b>m21</b>, <i>float</i> <b>m22</b>, <i>float</i> <b>dx</b>, <i>float</i> <b>dy</b>)
<tr>
<td><i>void</i>
<td><b>setTransform</b>(<i>float</i> <b>m11</b>, <i>float</i> <b>m12</b>, <i>float</i> <b>m21</b>, <i>float</i> <b>m22</b>, <i>float</i> <b>dx</b>, <i>float</i> <b>dy</b>)
</table>
<h2>Image drawing</h2>
<h3>Methods</h3>
<table>
<tr>
<th>Return
<th>Name
<tr>
<td><i>void</i>
<td><b>drawImage</b>(<i>Object</i> <b>image</b>, <i>float</i> <b>dx</b>, <i>float</i> <b>dy</b>, [Optional] <i>float</i> <b>dw</b>, <i>float</i> <b>dh</b>)
<tr>
<td colspan="2"><p>Argument <b>image</b> can be of type <i>HTMLImageElement</i>, <i>HTMLCanvasElement</i> or <i>HTMLVideoElement</i>.
<tr>
<td><i>void</i>
<td><b>drawImage</b>(<i>Object</i> <b>image</b>, <i>float</i> <b>sx</b>, <i>float</i> <b>sy</b>, <i>float</i> <b>sw</b>, <i>float</i> <b>sh</b>, <i>float</i> <b>dx</b>, <i>float</i> <b>dy</b>, <i>float</i> <b>dw</b>, <i>float</i> <b>dh</b>)
</table>
<h2>Compositing</h2>
<h3>Attributes</h3>
<table>
<tr>
<th>Name
<th>Type
<th>Default
<tr>
<td><b>globalAlpha</b>
<td><i>float</i>
<td>1.0
<tr>
<td><b>globalCompositeOperation</b>
<td><i>string</i>
<td>source-over
<tr>
<td colspan="3">
<p>Supports any of the following values:
<ul>
<li><figure><canvas width="80" height="80"></canvas><legend>source-over</legend></figure>
<li><figure><canvas width="80" height="80"></canvas><legend>source-in</legend></figure>
<li><figure><canvas width="80" height="80"></canvas><legend>source-out</legend></figure>
<li><figure><canvas width="80" height="80"></canvas><legend>source-atop</legend></figure>
<li><figure><canvas width="80" height="80"></canvas><legend>destination-over</legend></figure>
<li><figure><canvas width="80" height="80"></canvas><legend>destination-in</legend></figure>
<li><figure><canvas width="80" height="80"></canvas><legend>destination-out</legend></figure>
<li><figure><canvas width="80" height="80"></canvas><legend>destination-atop</legend></figure>
<li><figure><canvas width="80" height="80"></canvas><legend>lighter</legend></figure>
<li><figure><canvas width="80" height="80"></canvas><legend>copy</legend></figure>
<li><figure><canvas width="80" height="80"></canvas><legend>xor</legend></figure>
</ul>
<script>
var canvii = document.getElementsByTagName('canvas');
var type;
var ctx;
for (var i = 0; i < canvii.length; ++i){
type = canvii[i].parentNode.textContent;
ctx = canvii[i].getContext("2d");
ctx.fillStyle = "#09f";
ctx.fillRect(10,10,50,50);
ctx.globalCompositeOperation = type;
ctx.fillStyle = "#f30";
ctx.beginPath();
ctx.arc(50,50,30,0,Math.PI*2,true);
ctx.fill();
}
</script>
</table>
<h2>Line styles</h2>
<h3>Attributes</h3>
<table>
<tr>
<th>Name
<th>Type
<th>Default
<tr>
<td><b>lineWidth</b>
<td><i>float</i>
<td>1.0
<tr>
<td><b>lineCap</b>
<td><i>string</i>
<td>butt
<tr>
<td colspan="3">
<p>Supports any of the following values:
<ul>
<li><figure><canvas width="64" height="64"></canvas><legend>butt</legend></figure>
<li><figure><canvas width="64" height="64"></canvas><legend>round</legend></figure>
<li><figure><canvas width="64" height="64"></canvas><legend>square</legend></figure>
</ul>
<script>
for (var i = canvii.length - 1; i > canvii.length - 4; --i) {
type = canvii[i].parentNode.textContent;
var ctx = canvii[i].getContext("2d");
// Draw guides
ctx.strokeStyle = "#09f";
ctx.lineWidth = 5;
ctx.beginPath();
ctx.moveTo(0,10);
ctx.lineTo(64,10);
ctx.stroke();
ctx.strokeStyle = "black";
ctx.lineWidth = 16;
ctx.lineCap = type;
ctx.beginPath();
ctx.moveTo(32,10);
ctx.lineTo(32,42);
ctx.stroke();
}
</script>
<tr>
<td><b>lineJoin</b>
<td><i>string</i>
<td>miter
<tr>
<td colspan="3">
<p>Supports any of the following values:
<ul>
<li><figure><canvas width="64" height="64"></canvas><legend>round</legend></figure>
<li><figure><canvas width="64" height="64"></canvas><legend>bevel</legend></figure>
<li><figure><canvas width="64" height="64"></canvas><legend>miter</legend></figure>
</ul>
<script>
for (var i = canvii.length - 1; i > canvii.length - 4; --i) {
type = canvii[i].parentNode.textContent;
var ctx = canvii[i].getContext("2d");
ctx.strokeStyle = "black";
ctx.lineWidth = 16;
ctx.lineJoin = type;
ctx.beginPath();
ctx.moveTo(10,48);
ctx.lineTo(32,15);
ctx.lineTo(52,48);
ctx.stroke();
}
</script>
<tr>
<td><b>miterLimit</b>
<td><i>float</i>
<td>10
</table>
<h2>Colors, styles and shadows</h2>
<h3>Attributes</h3>
<table>
<tr>
<th>Name
<th>Type
<th>Default
<tr>
<td><b>strokeStyle</b>
<td><i>any</i>
<td>black
<tr>
<td><b>fillStyle</b>
<td><i>any</i>
<td>black
<tr>
<td><b>shadowOffsetX</b>
<td><i>float</i>
<td>0.0
<tr>
<td><b>shadowOffsetY</b>
<td><i>float</i>
<td>0.0
<tr>
<td><b>shadowBlur</b>
<td><i>float</i>
<td>0.0
<tr>
<td><b>shadowColor</b>
<td><i>string</i>
<td>transparent black
</table>
<h3>Methods</h3>
<table>
<tr>
<th>Return
<th>Name
<tr>
<td><i>CanvasGradient</i>
<td><b>createLinearGradient</b>(<i>float</i> <b>x0</b>, <i>float</i> <b>y0</b>, <i>float</i> <b>x1</b>, <i>float</i> <b>y1</b>)
<tr>
<td><i>CanvasGradient</i>
<td><b>createRadialGradient</b>(<i>float</i> <b>x0</b>, <i>float</i> <b>y0</b>, <i>float</i> <b>r0</b>, <i>float</i> <b>x1</b>, <i>float</i> <b>y1</b>, <i>float</i> <b>r1</b>)
<tr>
<td><i>CanvasPattern</i>
<td><b>createPattern</b>(<i>Object</i> <b>image</b>, <i>string</i> <b>repetition</b>)
<tr>
<td colspan="2">
<p><b>image</b> is <i>HTMLImageElement</i> or <i>HTMLCanvasElement</i>.
<p><b>repetition</b> supports any of the following values:
<ul>
<li>repeat (default)
<li>repeat-x
<li>repeat-y
<li>no-repeat
</ul>
</table>
<h3>CanvasGradient interface</h3>
<table>
<tr>
<th>Return
<th>Name
<tr>
<td><i>void</i>
<td><b>addColorStop</b>(<i>float</i> <b>offset</b>, <i>string</i> <b>color</b>)
</table>
<h3>CanvasPattern interface</h3>
<p>No attributes or methods.
<h2>Paths</h2>
<h3>Methods</h3>
<table>
<tr>
<th>Return
<th>Name
<tr>
<td><i>void</i>
<td><b>beginPath</b>()
<tr>
<td><i>void</i>
<td><b>closePath</b>()
<tr>
<td><i>void</i>
<td><b>fill</b>()
<tr>
<td><i>void</i>
<td><b>stroke</b>()
<tr>
<td><i>void</i>
<td><b>clip</b>()
<tr>
<td><i>void</i>
<td><b>moveTo</b>(<i>float</i> <b>x</b>, <i>float</i> <b>y</b>)
<tr>
<td><i>void</i>
<td><b>lineTo</b>(<i>float</i> <b>x</b>, <i>float</i> <b>y</b>)
<tr>
<td><i>void</i>
<td><b>quadraticCurveTo</b>(<i>float</i> <b>cpx</b>, <i>float</i> <b>cpy</b>, <i>float</i> <b>x</b>, <i>float</i> <b>y</b>)
<tr>
<td><i>void</i>
<td><b>bezierCurveTo</b>(<i>float</i> <b>cp1x</b>, <i>float</i> <b>cp1y</b>, <i>float</i> <b>cp2x</b>, <i>float</i> <b>cp2y</b>, <i>float</i> <b>x</b>, <i>float</i> <b>y</b>)
<tr>
<td><i>void</i>
<td><b>arcTo</b>(<i>float</i> <b>x1</b>, <i>float</i> <b>y1</b>, <i>float</i> <b>x2</b>, <i>float</i> <b>y2</b>, <i>float</i> <b>radius</b>)
<tr>
<td><i>void</i>
<td><b>arc</b>(<i>float</i> <b>x</b>, <i>float</i> <b>y</b>, <i>float</i> <b>radius</b>, <i>float</i> <b>startAngle</b>, <i>float</i> <b>endAngle</b>, <i>boolean</i> <b>anticlockwise</b>)
<tr>
<td><i>void</i>
<td><b>rect</b>(<i>float</i> <b>x</b>, <i>float</i> <b>y</b>, <i>float</i> <b>w</b>, <i>float</i> <b>h</b>)
<tr>
<td><i>boolean</i>
<td><b>isPointInPath</b>(<i>float</i> <b>x</b>, <i>float</i> <b>y</b>)
</table>
<h2>Text</h2>
<h3>Attributes</h3>
<table>
<tr>
<th>Name
<th>Type
<th>Default
<tr>
<td><b>font</b>
<td><i>string</i>
<td>10px sans-serif
<tr>
<td><b>textAlign</b>
<td><i>string</i>
<td>start
<tr>
<td colspan="3">
<p>Supports any of the following values:
<ul>
<li>start
<li>end
<li>left
<li>right
<li>center
</ul>
<tr>
<td><b>textBaseline</b>
<td><i>string</i>
<td>alphabetic
<tr>
<td colspan="3">
<p>Supports any of the following values:
<ul>
<li>top
<li>hanging
<li>middle
<li>alphabetic
<li>ideographic
<li>bottom
</ul>
</table>
<h3>Methods</h3>
<table>
<tr>
<th>Return
<th>Name
<tr>
<td><i>void</i>
<td><b>fillText</b>(<i>string</i> <b>text</b>, <i>float</i> <b>x</b>, <i>float</i> <b>y</b>, [Optional] <i>float</i> <b>maxWidth</b>)
<tr>
<td><i>void</i>
<td><b>strokeText</b>(<i>string</i> <b>text</b>, <i>float</i> <b>x</b>, <i>float</i> <b>y</b>, [Optional] <i>float</i> <b>maxWidth</b>)
<tr>
<td><i>TextMetrics</i>
<td><b>measureText</b>(<i>string</i> <b>text</b>)
</table>
<h3>TextMetrics interface</h3>
<table>
<tr>
<th>Name
<th>Type
<th>Default
<tr>
<td><b>width</b>
<td><i>float</i>
<td>[readonly]
</table>
<h2>Rectangles</h2>
<h3>Methods</h3>
<table>
<tr>
<th>Return
<th>Name
<tr>
<td><i>void</i>
<td><b>clearRect</b>(<i>float</i> <b>x</b>, <i>float</i> <b>y</b>, <i>float</i> <b>w</b>, <i>float</i> <b>h</b>)
<tr>
<td><i>void</i>
<td><b>fillRect</b>(<i>float</i> <b>x</b>, <i>float</i> <b>y</b>, <i>float</i> <b>w</b>, <i>float</i> <b>h</b>)
<tr>
<td><i>void</i>
<td><b>strokeRect</b>(<i>float</i> <b>x</b>, <i>float</i> <b>y</b>, <i>float</i> <b>w</b>, <i>float</i> <b>h</b>)
</table>
<h2>Pixel manipulation</h2>
<h3>Methods</h3>
<table>
<tr>
<th>Return
<th>Name
<tr>
<td><i>ImageData</i>
<td><b>createImageData</b>(<i>float</i> <b>sw</b>, <i>float</i> <b>sh</b>)
<tr>
<td><i>ImageData</i>
<td><b>getImageData</b>(<i>float</i> <b>sx</b>, <i>float</i> <b>sy</b>, <i>float</i> <b>sw</b>, <i>float</i> <b>sh</b>)
<tr>
<td><i>void</i>
<td><b>putImageData</b>(<i>ImageData</i> <b>imagedata</b>, <i>float</i> <b>dx</b>, <i>float</i> <b>dy</b>, [Optional] <i>float</i> <b>dirtyX</b>, <i>float</i> <b>dirtyY</b>, <i>float</i> <b>dirtyWidth</b>, <i>float</i> <b>dirtyHeight</b>)
</table>
<h3>ImageData interface</h3>
<table>
<tr>
<th>Name
<th>Type
<th>Default
<tr>
<td><b>width</b>
<td><i>unsigned long</i>
<td>[readonly]
<tr>
<td><b>height</b>
<td><i>unsigned long</i>
<td>[readonly]
<tr>
<td><b>data</b>
<td><i>CanvasPixelArray</i>
<td>[readonly]
</table>
<h3>CanvasPixelArray interface</h3>
<table>
<tr>
<th>Name
<th>Type
<th>Default
<tr>
<td><b>length</b>
<td><i>unsigned long</i>
<td>[readonly]
</table>
</article>
<footer>
<p>Source: <a href="http://www.whatwg.org/specs/web-apps/current-work/">http://www.whatwg.org/specs/web-apps/current-work/</a> (2009-02-26)
<p>This is a modified version of <a href="http://blog.nihilogic.dk/2009/02/html5-canvas-cheat-sheet.html">http://blog.nihilogic.dk/2009/02/html5-canvas-cheat-sheet.html</a>
</footer>