kripken/emscripten — pull request #2595 by juj (2014-07-29 13:45:32+00:00)
Title: Fix test sdl canvas alpha

This makes the test pass on OSX in Firefox and Chrome.

Perhaps in the original reference image there was a browser bug in 2d canvas context alpha blending that generated an incorrect reference image? I am seeing consistent results on Windows and OSX for this.