CMake already distributes FindSDL*.cmake files for SDL and SDL_mixer,
which support custom prefixes via environment variables, removing the
need for ad-hoc logic in Win9x builds.
Also, according to FindSDL.cmake, #include <SDL.h> is the preferred way
for portability reasons, instead of #include <SDL/SDL.h>, which is the
option that has been used so far.
The following properties are supported:
- Sound: "loop". Must be either 0 or 1
- Images: "transparent". Must be either 0 or 1
These headers are only used for non-PS1 builds, since .TIM and .VAG
files do already implement such information.
The PS1 port relies on a heap for primitives since the GPU renders the
scene asynchronously. However, SDL-based platforms render primitives
synchronously, so structures can be allocated on the stack instead.
