#pragma once

#include <stddef.h>
#include <stdint.h>
#include <stdbool.h>

struct rgn;
struct msgq;
struct log;
struct ax_backend;
struct ax_theme;

struct ax_font_h;

extern const char* ax__backend_impl_name;
extern size_t ax__backend_desired_region_size;

int ax__backend_new(
    struct rgn* init_rgn,
    struct log* lg,
    struct ax_backend** out_bac,
    const char** out_err);

struct msgq* ax__backend_msgq(struct ax_backend*);
struct sub* ax__backend_sub_events(struct ax_backend*, struct rgn* dst_rgn);
bool ax__backend_is_shutdown(struct ax_backend*);

void ax__backend_wait_for_event(struct ax_backend*);
void ax__backend_step(struct ax_backend*);