This method uses a '2d' canvas context for pixel manipulation, and can apply a color scale or Y flip to the given image.
Unfortunately, canvas always uses premultiplied data, and thus images with low alpha values (or multiplying by a=0) will result in black pixels.
This method uses a '2d' canvas context for pixel manipulation, and can apply a color scale or Y flip to the given image. Unfortunately, canvas always uses premultiplied data, and thus images with low alpha values (or multiplying by a=0) will result in black pixels.