Check if the intersection is less than a pixel high or wide #11
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If the intersection is less than a pixel high or wide, `getImageData()` will (rightfully) throw the following error: ```Uncaught DOMException: Failed to execute 'getImageData' on 'CanvasRenderingContext2D': The source height is 0.``` I guess `getImageData()` does an implicit `Math.floor()` on the `width` and `height` parameters to make sure there is actual data to return.
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If the intersection is less than a pixel high or wide,
getImageData()will (rightfully) throw the following error:Uncaught DOMException: Failed to execute 'getImageData' on 'CanvasRenderingContext2D': The source height is 0.I guess
getImageData()does an implicitMath.floor()on thewidthandheightparameters to make sure there is actual data to return.