Function stbi__get_chunk_header

lite/example/cpp_example/mge/cv/stb_image.h:4970–4975

} stbi__pngchunk;

static stbi__pngchunk stbi__get_chunk_header(stbi__context* s) {
    stbi__pngchunk c;
    c.length = stbi__get32be(s);
    c.type = stbi__get32be(s);
    return c;
}

static int stbi__check_png_header(stbi__context* s) {
    static const stbi_uc png_sig[8] = {137, 80, 78, 71, 13, 10, 26, 10};