Use this function to save a surface to a BMP file.
int SDL_SaveBMP(SDL_Surface* surface, const char* file)
the SDL_Surface structure containing the image to be saved
the file to be saved to
Returns 0 on success or a negative error code on failure; call SDL_GetError() for more information.
You can add your code example here
Surfaces with a 24-bit, 32-bit and paletted 8-bit format get saved in the BMP directly. Other RGB formats with 8-bit or higher get converted to a 24-bit surface or, if they have an alpha mask or a colorkey, to a 32-bit surface before they are saved. YUV and paletted 1-bit and 4-bit formats are not supported.