surface:get_pixels() not working for the screen surface
In the scale2x unit test, replace sol.shader.create("scale2x")
by sol.shader.create("sepia")
-> The test still passes even though the sepia shader is completely different from the scale2x software filter.
Is surface:get_pixels() even supposed to work for the screen surface? If yes, this should be fixed, and if no, it should be documented.