TransparentBackground.jslib

var LibraryGLClear = {

    glClear: function(mask)

    {

        if (mask == 0x00004000)

        {

            var v = GLctx.getParameter(GLctx.COLOR_WRITEMASK);

            if (!v[0] && !v[1] && !v[2] && v[3])

                // We are trying to clear alpha only -- skip.

                return;

        }

        GLctx.clear(mask);

    }

};

mergeInto(LibraryManager.library, LibraryGLClear);