// SPDX-License-Identifier: GPL-2.1-or-later
/*
 * Copyright (C) 2009-2026 Cyril Hrubis <metan@ucw.cz>
 */

/*

  Simple example that shows X11 window with image.

 */

#include <stdio.h>
#include <errno.h>
#include <string.h>

#include <gfxprim.h>

int main(int argc, char *argv[])
{
        gp_backend *backend;
        gp_pixmap *image;
        int x_off = 0, y_off = 0;

        if (argc != 2) {
                fprintf(stderr, "Takes image as an argument\n");
                return 1;
        }

        image = gp_load_image(argv[1], NULL);
        if (!image) {
                fprintf(stderr, "Failed to load bitmap: %s\n", strerror(errno));
                return 1;
        }

        backend = gp_x11_init(NULL, 0, 0, image->w, image->h, argv[1], 0);
        if (!backend) {
                fprintf(stderr, "Failed to initalize backend\n");
                return 1;
        }

        for (;;) {
                gp_event *ev = gp_backend_ev_wait(backend);

                switch (ev->type) {
                case GP_EV_KEY:
                        if (ev->val == GP_KEY_Q) {
                                gp_backend_exit(backend);
                                return 0;
                        }
                break;
                case GP_EV_SYS:
                        switch (ev->code) {
                        case GP_EV_SYS_QUIT:
                                gp_backend_exit(backend);
                                return 0;
                        break;
                        case GP_EV_SYS_RENDER_STOP:
                                gp_backend_render_stopped(backend);
                        break;
                        case GP_EV_SYS_RENDER_RESIZE:
                                x_off = ((int)ev->resize.w - (int)image->w) / 2;
                                y_off = ((int)ev->resize.h - (int)image->h) / 2;
                        break;
                        case GP_EV_SYS_RENDER_START:
                                gp_fill(backend->pixmap, 0);
                                gp_blit_clipped(image, 0, 0, image->w, image->h, backend->pixmap, x_off, y_off);
                                gp_backend_flip(backend);
                        break;
                        }
                }
        }

        return 0;
}