ImageData.data should return a Uint8ClampedArray instead of a CanvasPixelArray

[zbjornson]

CanvasPixelArray is deprecated per https://www.w3.org/Bugs/Public/show_bug.cgi?id=12586.

I don't care, except CanvasPixelArray doesn't have a set method that typed arrays have.

Also encountered here by another user: http://stackoverflow.com/questions/21435027/node-js-canvas-implementation-with-uint8clampedarray

(Seeing if I understand this library well enough to submit a pull request...)

[miketahani]

Bump.

edit: also in need of the typed array set method

[mitar]

CanvasPixelArray is missing set, yes.

[puzrin]

Ping! It would be nice to retun Uint8ClampedArray.

We use this module for benchmarking vertical/horizontal convolvers. Improper array type cause deoptimizations, because JS thinks that convolver function become polymorphic (at first pass it receives CanvasPixelArray from src, at second - Uint8CampedArray from internal buffers).

Of cause, workarounds possible, but it would be nice if canvas works as expected.

[LinusU]

Fixed by #604