source: neercs/trunk/src/screensaver.c @ 3551 Tweet

/*
 *  neercs        console-based window manager
 *  Copyright (c) 2006 Sam Hocevar <sam@zoy.org>
 *                2008 Jean-Yves Lamoureux <jylam@lnxscene.org>
 *                All Rights Reserved
 *
 *  $Id: screensaver.c 3551 2009-07-10 14:46:54Z pterjan $
 *
 *  This program is free software. It comes without any warranty, to
 *  the extent permitted by applicable law. You can redistribute it
 *  and/or modify it under the terms of the Do What The Fuck You Want
 *  To Public License, Version 2, as published by Sam Hocevar. See
 *  http://sam.zoy.org/wtfpl/COPYING for more details.
 */

#include "config.h"

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <signal.h>
#include <sys/wait.h>
#include <errno.h>
#include <unistd.h>

#include <caca.h>
#include <caca.h>

#include "neercs.h"


void screensaver_init(struct screen_list *screen_list)
{

    screensaver_flying_toasters_init(screen_list);
}

void screensaver_kill(struct screen_list *screen_list)
{

    screensaver_flying_toasters_kill(screen_list);
}

void draw_screensaver(struct screen_list *screen_list)
{
    screensaver_flying_toasters(screen_list);
}




/* Flying Toasters */

#define COUNT 15
#define PRECISION 100

char toaster_text[3][99] = { {
"      __._ \n"
"   .-'== _',\n"
"  <|_= .-'  |\n"
"   | --|   \\'.-_ \n"
"   |   | \\  \" _.\n"
"    `-_|.-\\_.-\n"
}, {
"      __._ \n"
"   .-'== _',\n"
"  \\|_= .-'  |\n"
"   | --|  __'-.\n"
"   |   | ___.-\n"
"    `-_|.-\n"
}, {
"   _- __._\n"
"  /.-'== _',_.-.\n"
"  \\|_= .-'/  _.'\n"
"   | --| / .-\n"
"   |   |  _.|\n"
"    `-_|.-\n"} };

char toaster_mask[3][99] = { {
"      __._ \n"
"   .-'== _',\n"
"  <|_=X.-'XX|\n"
"   |X--|XXX\\'.-_ \n"
"   |XXX|X\\XX\"X_.\n"
"    `-_|.-\\_.-\n"
}, {

"      __._ \n"
"   .-'== _',\n"
"  \\|_= .-'XX|\n"
"   |X--|XX__'-.\n"
"   |XXX|X___.-\n"
"    `-_|.-\n"
}, {
"   _- __._\n"
"  /.-'== _',_.-.\n"
"  \\|_= .-'/XX_.'\n"
"   |X--|X/X.-\n"
"   |XXX|XX_.|\n"
"    `-_|.-\n"} };

struct flying_toaster
{
    int x[COUNT], y[COUNT], s[COUNT];
    caca_canvas_t **toaster;
    caca_canvas_t **mask;
};

void screensaver_flying_toasters_init(struct screen_list *screen_list)
{
    struct flying_toaster *flying_toaster;
    int w = caca_get_canvas_width(screen_list->cv);
    int h = caca_get_canvas_height(screen_list->cv);
    int i;

    flying_toaster = malloc(sizeof(struct flying_toaster));
    flying_toaster->toaster = (caca_canvas_t **)malloc(sizeof(caca_canvas_t*)*3);
    flying_toaster->mask = (caca_canvas_t **)malloc(sizeof(caca_canvas_t*)*3);

    for(i = 0; i < 3; i++)
    {
        flying_toaster->toaster[i] = caca_create_canvas(0, 0);
        flying_toaster->mask[i] = caca_create_canvas(0, 0);
        caca_import_memory(flying_toaster->toaster[i],
                           toaster_text[i],
                           strlen(toaster_text[i]), "utf8");        
        caca_import_memory(flying_toaster->mask[i],
                           toaster_mask[i],
                           strlen(toaster_mask[i]), "utf8");        
    }

    for(i = 0; i < COUNT; i++)
    {
        flying_toaster->x[i] = (rand()%w) * PRECISION;
        flying_toaster->y[i] = (rand()%h) * PRECISION;
        flying_toaster->s[i] = (rand()%3) * PRECISION;
    }


    screen_list->screensaver_data = flying_toaster;
}

void screensaver_flying_toasters_kill(struct screen_list *screen_list)
{
    struct flying_toaster *flying_toaster = screen_list->screensaver_data;

    caca_free_canvas(flying_toaster->toaster[0]);
    caca_free_canvas(flying_toaster->toaster[1]);
    caca_free_canvas(flying_toaster->toaster[2]);
    free(flying_toaster->toaster);
    free(flying_toaster);
    screen_list->screensaver_data = NULL;
}

void screensaver_flying_toasters(struct screen_list *screen_list)
{
    struct flying_toaster *d = screen_list->screensaver_data;
    int i, w, h, x, y, s;
    if(!d) return;

    w = caca_get_canvas_width(screen_list->cv);
    h = caca_get_canvas_height(screen_list->cv);

    caca_set_color_ansi(screen_list->cv, CACA_WHITE, CACA_BLACK);
    caca_clear_canvas(screen_list->cv);

    for(i = 0; i < COUNT; i++)
    {
        x = d->x[i]/PRECISION;
        y = d->y[i]/PRECISION;
        s = d->s[i]/PRECISION;

        caca_blit(screen_list->cv, x, y, d->toaster[s], d->mask[s]);

        d->x[i]-=40;
        d->y[i]+=10;

        if(d->x[i]/PRECISION + caca_get_canvas_width(d->toaster[s])<=0)
            d->x[i] = ((rand()%w)/3+w) * PRECISION;
        if(d->y[i]/PRECISION>=h)
            d->y[i] = ((rand()%h)/2-h) * PRECISION;

        d->s[i] = ((d->s[i]+24)%(3*PRECISION));
    }
}