i working on a mobilegame and the designs are 1024x768 and i create the canvas to the max i have with a scale. like this

ig.main( '#canvas', MyGame, 10, 1024, (window.docHeight/(window.docWidth/1024)), window.docWidth/1024);

so the canvas use the max screensize. i use the 1024 designs, scale the width and cut the height. works fine for the most resolutions.

but with 854x480 i ve got the error:

IndexSizeError: Index or size is negative or greater than the allowed amount in image.js line 133

when i draw for example a backgroundimage.

i think its a problem with the rounding, cause if i use this formula the result for height is only 479,999999....

plz help :)