kripken/emscripten — pull request #858 by ehsan (2013-02-19 17:19:16+00:00)
Title: Use the copy composite operation when calling drawImage

This optimizes IMG_Load so that it just does a memcpy as opposed to try
to composite. The resulting buffer will be the same, it just happens
that we don't need to do all of the work involved in compositing in the
first place.