Use this function to prepare a read-write memory buffer for use with SDL_RWops.
SDL_RWops* SDL_RWFromMem(void* mem, int size)
a pointer to a buffer to feed an SDL_RWops stream
the buffer size, in bytes
char bitmap; SDL_RWops *rw = SDL_RWFromMem(bitmap, sizeof(bitmap)); SDL_SaveBMP_RW(screen, rw, 1); /* closes SDL_RWops, leaves us memory buffer of data */
This function sets up an SDL_RWops struct based on a memory area of a certain size, for both read and write access.
This memory buffer is not copied by the RWops; the pointer you provide must remain valid until you close the stream. Closing the stream will not free the original buffer.
If you need to make sure the RWops never writes to the memory buffer, you should use SDL_RWFromConstMem() with a read-only buffer of memory instead.