The first release of the sdl12-compat compatibility layer has been published, providing an API compatible with SDL 1.2 binary and source code, but running on top of SDL 2. The project can act as a complete replacement for SDL 1.2 and is suitable for running legacy programs written for SDL 1.2 using modern capabilities of the current SDL 2 branch. Including sdl12-compat allows you to run applications with a non-native screen resolution, without changing the actual screen resolution in the system and using OpenGL for rendering.
Source: opennet.ru