the width of the surface.
the height of the surface.
the SDL_PixelFormat for the new surface's pixel format.
a pointer to existing pixel data.
the number of bytes between each row, including padding.
The new SDL_Surface structure that is created or null on failure; call SDL_GetError for more information.
Allocate a new surface with a specific pixel format and existing pixel data.
No copy is made of the pixel data. Pixel data is not managed automatically; you must free the surface before you free the pixel data.
Pitch is the offset in bytes from one row of pixels to the next, e.g. width*4 for SDL_PIXELFORMAT_RGBA8888.
You may pass null for pixels and 0 for pitch to create a surface that you will fill in with valid values later.