4. Defines

IMG_MAJOR_VERSION

1
SDL_image library major number at compilation time

IMG_MINOR_VERSION

2
SDL_image library minor number at compilation time

IMG_PATCHLEVEL

8
SDL_image library patch level at compilation time

IMG_INIT_JPG

1
IMG_Init JPG image format support flag

IMG_INIT_PNG

2
IMG_Init PNG image format support flag

IMG_INIT_TIF

4
IMG_Init TIF image format support flag