Opera: canvas support in Opera

`canvas` support in Opera

The canvas element enables a bitmap drawing API in HTML. It can be considered the scripted version of the img element. To draw a simple green square you would use the following code:

<!doctype html>
<html>
 <head>
  <title>&lt;canvas> demo</title>
  <style> canvas { border:solid } </style>
 </head>
 <body>
  <p><canvas width="150" height="200">
   <code>canvas</code> element not supported.
  </canvas></p>
  <script type="text/javascript">
   var canvas = document.getElementsByTagName("canvas"),
       context = canvas.getContext("2d")
   context.fillStyle = "lime"
   context.fillRect(0, 0, 150, 200)
  </script>
 </body>
</html>

Two interfaces are important for the canvas element: the HTMLCanvasElement interface which is exposed by the element and the CanvasRenderingContext2D interface which is what's being returned with the getContext("2d") method call.

`HTMLCanvasElement` support
Member	Supported	Notes
`width`	Yes	-
`height`	Yes	-
`toDataURL()`	Yes	-
`getContext()`	Yes	Opera supports `2d` as parameter.

`CanvasRenderingContext2D` support
Member	Supported	Notes
`canvas`	Yes	-
`save()`	Yes	-
`restore()`	Yes	-
`scale(x, y)`	Yes	-
`rotate(angle)`	Yes	-
`translate(x, y)`	Yes	-
`transform(m11, m12, m21, m22, dx, dy)`	Yes	-
`setTransform(m11, m12, m21, m22, dx, dy)`	Yes	-
`globalAlpha`	Yes	-
`globalCompositeOperation`	Yes	-
`strokeStyle`	Yes	-
`fillStyle`	Yes	-
`createLinearGradient(x0, y0, x1, y1)`	Yes	-
`createRadialGradient(x0, y0, r0, x1, y1, r1)`	Yes	-
`createPattern(image, repetition)`	Yes	-
`lineWidth`	Yes	-
`lineCap`	Yes	-
`lineJoin`	Yes	-
`miterLimit`	Yes	-
`shadowOffsetX`	Partial - get and set values	Supported by Opera within the DOM, but not yet rendered.
`shadowOffsetY`	Partial - get and set values	Supported by Opera within the DOM, but not yet rendered.
`shadowBlur`	Partial - get and set values	Supported by Opera within the DOM, but not yet rendered.
`shadowColor`	Partial - get and set values	Supported by Opera within the DOM, but not yet rendered.
`clearRect(x, y, w, h)`	Yes	-
`fillRect(x, y, w, h)`	Yes	-
`strokeRect(x, y, w, h)`	Yes	-
`beginPath()`	Yes	-
`closePath()`	Yes	-
`moveTo(x, y)`	Yes	-
`lineTo(x, y)`	Yes	-
`quadraticCurveTo(cpx, cpy, x, y)`	Yes	-
`bezierCurveTo(cp1x, cp1y, cp2x, cp2y, x, y)`	Yes	-
`arcTo(x1, y1, x2, y2, radius)`	Yes	-
`rect(x, y, w, h)`	Yes	-
`arc(x, y, radius, startAngle, endAngle, anticlockwise)`	Yes	-
`fill()`	Yes	-
`stroke()`	Yes	-
`clip()`	Yes	-
`isPointInPath(x, y)`	Yes	-
`drawImage(image, dx, dy)`	Yes	-
`drawImage(image, dx, dy, dw, dh)`	Yes	-
`drawImage(image, sx, sy, sw, sh, dx, dy, dw, dh)`	Yes	-
`getImageData(sx, sy, sw, sh)`	Yes	-
`putImageData(image, dx, dy)`	Yes	-
`font`	No	-
`textAlign`	No	-
`textBaseline`	No	-
`fillText(text, x, y)`	No	-
`fillText(text, x, y, maxWidth)`	No	-
`strokeText(test, x, y)`	No	-
`strokeText(test, x, y, maxWidth)`	No	-
`measureText(text)`	No	-
`createImageData(sw, sh)`	No	-

`CanvasGradient` support
Member	Supported	Notes
`addStopColor(offset, color)`	Yes	-

`CanvasPattern` support
Member	Supported	Notes
`// no members`	-	-

`TextMetrics` support
Member	Supported	Notes
`width`	No	Opera does not support the `TextMetrics` interface.

`ImageData` support
Member	Supported	Notes
`width`	Yes	-
`height`	Yes	-

`CanvasPixelArray` support
Member	Supported	Notes
`length`	Yes	`window.CanvasPixelArray` is undefined in Opera, i.e., there is no interface object.
`[IndexGetter]`	Yes
`[IndexSetter]`	Yes

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canvas support in Opera

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`canvas` support in Opera