Chrome v17 CanvasPixelArray issue

[ray73864]

On Chrome 17 i am getting the following issue:

TypeError: Cannot read property 'prototype' of undefined
pdf.js:200Warning: Unhandled rejection: TypeError: Object #<CanvasPixelArray> has no method 'set'
TypeError: Object #<CanvasPixelArray> has no method 'set'
    at putBinaryImageData (http://10.5.0.3/pse/pdfjs/build/pdf.js:5806:14)
    at Object.CanvasGraphics_paintInlineImageXObject (http://10.5.0.3/pse/pdfjs/build/pdf.js:7291:9)
    at Object.CanvasGraphics_paintImageXObject (http://10.5.0.3/pse/pdfjs/build/pdf.js:7246:12)
    at Object.CanvasGraphics_executeOperatorList [as executeOperatorList] (http://10.5.0.3/pse/pdfjs/build/pdf.js:6037:22)
    at Object.InternalRenderTask__next [as _next] (http://10.5.0.3/pse/pdfjs/build/pdf.js:5211:39)
    at Object.pdfViewcContinueCallback [as continueCallback] (http://10.5.0.3/pse/pdfjs/web/viewer.js:4464:9)
    at Object.InternalRenderTask__continue [as _continue] (http://10.5.0.3/pse/pdfjs/build/pdf.js:5201:21)
    at Object.runHandlers (http://10.5.0.3/pse/pdfjs/build/pdf.js:1066:35)

It isn't happening in the latest version of Chrome, just wondering if there is a simple fix that doesn't involve upgrading chrome as that isn't really an option in this particular case.

[yurydelendik]

Shall be fixed by adding web/compatibility.js to the scripts. See #4420. Closing as answered.

[ray73864]

I already have that, i'm using the default viewer.html from the 'web' directory.

Still didn't work though on chrome 17.

[yurydelendik]

Then the polyfill to properly hook into CanvasPixelArray prototype shall be fixed

[CodingFabian]

The problem is that the polyfill has no access. the code thinks CanvasPixelArray is window scoped, but it is not.
what i see as an option see to refactor canvas.js not to rely on context for generating these image data arrays:
var chunkImgData = ctx.createImageData(width, fullChunkHeight);

if there would be a createImageData(ctx) function, we could optimize/polyfill there.

[CodingFabian]

i guess it would be possible to polyfill it differently, ill put a PR together.