Module: StackBlur

StackBlur - a fast almost Gaussian Blur For Canvas

In case you find this class useful - especially in commercial projects - I am not totally unhappy for a small donation to my PayPal account mario@quasimondo.de

Or support me on flattr: https://flattr.com/thing/72791/StackBlur-a-fast-almost-Gaussian-Blur-Effect-for-CanvasJavascript

Version:
  • 0.5
Author:
Copyright:
  • (c) 2010 Mario Klingemann Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Source:

Classes

BlurStack

Methods

(static) canvasRGB()

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(static) canvasRGBA()

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(static) image()

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(static) imageDataRGB()

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(static) imageDataRGBA()

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(inner) getImageDataFromCanvas(canvas, topX, topY, width, height) → {ImageData}

Parameters:
Name Type Description
canvas string | HTMLCanvasElement
topX Integer
topY Integer
width Integer
height Integer
Source:
Throws:
Error | TypeError
Returns:

See https://html.spec.whatwg.org/multipage/canvas.html#imagedata

Type
ImageData

(inner) processCanvasRGB(canvas, topX, topY, width, height, radius) → {undefined}

Parameters:
Name Type Description
canvas HTMLCanvasElement
topX Integer
topY Integer
width Integer
height Integer
radius Float
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Returns:
Type
undefined

(inner) processCanvasRGBA(canvas, topX, topY, width, height, radius) → {undefined}

Parameters:
Name Type Description
canvas HTMLCanvasElement
topX Integer
topY Integer
width Integer
height Integer
radius Float
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Returns:
Type
undefined

(inner) processImage(img, canvas, radius, blurAlphaChannel) → {undefined}

Parameters:
Name Type Description
img string | HTMLImageElement
canvas string | HTMLCanvasElement
radius Float
blurAlphaChannel boolean
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Returns:
Type
undefined

(inner) processImageDataRGB(imageData, topX, topY, width, height, radius) → {ImageData}

Parameters:
Name Type Description
imageData ImageData
topX Integer
topY Integer
width Integer
height Integer
radius Float
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Returns:
Type
ImageData

(inner) processImageDataRGBA(imageData, topX, topY, width, height, radius) → {ImageData}

Parameters:
Name Type Description
imageData ImageData
topX Integer
topY Integer
width Integer
height Integer
radius Float
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Returns:
Type
ImageData