#ifndef RENDER_PNG_INTERNAL_H
#define RENDER_PNG_INTERNAL_H

#include <png.h>

#include "render.h"
#include "render_png.h"

struct render_png {
    // do I need to free it?
    int owned_by_me;

    // libpng handles
    png_structp png_ptr;
    png_infop info_ptr;

    // some info that we need to keep from the struct render
    render_ctx_write_cb io_write_fn;
    render_ctx_flush_cb io_flush_fn;
    void *cb_arg;
};

int render_png_init (struct render_png *ctx, struct render *render);
int render_png_deinit (struct render_png *ctx);

#endif /* RENDER_PNG_INTERNAL_H */