Function stbi__start_callbacks

lite/example/cpp_example/mge/cv/stb_image.h:856–865

initialize a callback-based context

// initialize a callback-based context
static void stbi__start_callbacks(stbi__context* s, stbi_io_callbacks* c, void* user) {
    s->io = *c;
    s->io_user_data = user;
    s->buflen = sizeof(s->buffer_start);
    s->read_from_callbacks = 1;
    s->callback_already_read = 0;
    s->img_buffer = s->img_buffer_original = s->buffer_start;
    stbi__refill_buffer(s);
    s->img_buffer_original_end = s->img_buffer_end;
}

#ifndef STBI_NO_STDIO