Function stbi__pic_test_core

lite/example/cpp_example/mge/cv/stb_image.h:6969–6982

}

static int stbi__pic_test_core(stbi__context* s) {
    int i;

    if (!stbi__pic_is4(s, "\x53\x80\xF6\x34"))
        return 0;

    for (i = 0; i < 84; ++i)
        stbi__get8(s);

    if (!stbi__pic_is4(s, "PICT"))
        return 0;

    return 1;
}

typedef struct {
    stbi_uc size, type, channel;