4 commits

Author	SHA1	Message	Date
Gered	f25efe3d04	standardize on the calculation in surface_get_index_of ... and removed the conditional in it, but profiling shows it makes a negligible difference in release builds	2015-01-19 00:12:04 -05:00
Gered	495b64a855	fix test to work with sideways surface buffers	2015-01-18 23:15:32 -05:00
Gered	5d6519a8be	add coordinate and surface x/y increment/offset tests	2015-01-18 22:54:38 -05:00
Gered	2982915da3	add basic surface tests	2015-01-18 22:22:58 -05:00