Starting to refactor to call sourceWidth and sourceHeight directly instead of thru a function.
Starting to refactor to call sourceWidth and sourceHeight directly instead of thru a function.

alanwsmith/document.write-image-loader,alanwsmith/doc-write-image-loader,alanwsmith/document.write-image-loader,alanwsmith/doc-write-image-loader,alanwsmith/doc-write-image-loader