Function stbi__rewind

lite/example/cpp_example/mge/cv/stb_image.h:900–906

#endif  // !STBI_NO_STDIO

static void stbi__rewind(stbi__context* s) {
    // conceptually rewind SHOULD rewind to the beginning of the stream,
    // but we just rewind to the beginning of the initial buffer, because
    // we only use it after doing 'test', which only ever looks at at most 92 bytes
    s->img_buffer = s->img_buffer_original;
    s->img_buffer_end = s->img_buffer_original_end;
}

enum { STBI_ORDER_RGB, STBI_ORDER_BGR };