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Failed to access HTML canvas element while exporting image

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Hi,

We are developing PCF control for visualization using Bing Map sample code from the link given below:
https://github.com/microsoft/BingMapsV8CodeSamples/blob/master/Samples/Experimental/MapImageGenerator/MapImageGeneratorModule.ts

We successfully load the mapImageGenerator module in our control, but we failed to access the HTML canvas element. We want to export the image like canvas.toDataURL("image/png"). But it gives error like ''Tainted canvases may not be exported.''

Does anyone know how to do the same in PCF Control?

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Power Apps Pro Dev & ISV

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cchannon 4,702 Moderator on at

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I don't know. The code on that git is pretty sketchy. I mean, there is a lot of "don't actually use this" disclaimer at the top. I think you might want to look for something else as your example:

* Warning!!! * This is an experimental module. It accesses the maps DOM in an unsupported way and can break at anytime. * * Known limitations * - Does not support navigation controls, scale bars, Infoboxes, AnimatedTileLayers, TileLayers, and most Custom Overlays * - CORS required for map tiles and custom pushpin images. * - Streetside imagery is not supported. * - Bing Maps terms of use does not allow Ordnance Survey or Birdseye imagery to be "printed".

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Hemant Gaur on at

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Seems to be security related error, you can explore if there is a way to get the content in the app and save/print it using the expressions/browser as opposed to direct download.

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