a pointer to a read-only buffer to feed an SDL_IOStream stream.
the buffer size, in bytes.
A pointer to a new SDL_IOStream structure or NULL on failure; call SDL_GetError() for more information.
Threadsafety: It is safe to call this function from any thread.
Use this function to prepare a read-only memory buffer for use with SDL_IOStream.
This function sets up an SDL_IOStream struct based on a memory area of a certain size. It assumes the memory area is not writable.
Attempting to write to this SDL_IOStream stream will report an error without writing to the memory buffer.
This memory buffer is not copied by the SDL_IOStream; 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 write to a memory buffer, you should use SDL_IOFromMem() with a writable buffer of memory instead.
The following properties will be set at creation time by SDL:
- SDL_PROP_IOSTREAM_MEMORY_POINTER: this will be the mem parameter that was passed to this function. - SDL_PROP_IOSTREAM_MEMORY_SIZE_NUMBER: this will be the size parameter that was passed to this function.