589 lines
16 KiB
C
589 lines
16 KiB
C
/*
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* demo demo for libcaca
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* Copyright (c) 2003-2012 Sam Hocevar <sam@hocevar.net>
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* All Rights Reserved
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*
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* This program is free software. It comes without any warranty, to
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* the extent permitted by applicable law. You can redistribute it
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* and/or modify it under the terms of the Do What the Fuck You Want
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* to Public License, Version 2, as published by Sam Hocevar. See
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* http://www.wtfpl.net/ for more details.
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*/
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#include "config.h"
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#if !defined(__KERNEL__)
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# include <math.h>
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# include <string.h>
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# include <stdio.h>
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#endif
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#ifndef M_PI
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# define M_PI 3.14159265358979323846
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#endif
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#include "caca.h"
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static void display_menu(void);
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static void demo_all(void);
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static void demo_dots(void);
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static void demo_lines(void);
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static void demo_boxes(void);
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static void demo_ellipses(void);
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static void demo_triangles(void);
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/*static void demo_sprites(void);*/
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static void demo_render(void);
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int bounds = 0;
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int outline = 0;
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int dithering = 0;
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#if 0
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caca_sprite_t *sprite = NULL;
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#endif
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caca_canvas_t *cv;
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caca_display_t *dp;
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int main(int argc, char **argv)
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{
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void (*demo)(void) = NULL;
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int quit = 0;
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cv = caca_create_canvas(80, 24);
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if(cv == NULL)
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{
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printf("Failed to create canvas\n");
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return 1;
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}
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dp = caca_create_display(cv);
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if(dp == NULL)
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{
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printf("Failed to create display\n");
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return 1;
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}
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caca_set_display_time(dp, 40000);
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/* Initialize data */
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#if 0
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sprite = caca_load_sprite("caca.txt");
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if(!sprite)
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sprite = caca_load_sprite("examples/caca.txt");
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#endif
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/* Disable cursor */
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caca_set_mouse(dp, 0);
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/* Main menu */
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display_menu();
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caca_refresh_display(dp);
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/* Go ! */
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while(!quit)
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{
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caca_event_t ev;
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int menu = 0, mouse = 0, xmouse = 0, ymouse = 0;
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while(caca_get_event(dp, CACA_EVENT_ANY, &ev, 0))
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{
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if(demo && (caca_get_event_type(&ev) & CACA_EVENT_KEY_PRESS))
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{
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menu = 1;
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demo = NULL;
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}
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else if(caca_get_event_type(&ev) & CACA_EVENT_KEY_PRESS)
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{
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switch(caca_get_event_key_ch(&ev))
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{
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case 'q':
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case 'Q':
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case CACA_KEY_ESCAPE:
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demo = NULL;
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quit = 1;
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break;
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case 'o':
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case 'O':
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outline = (outline + 1) % 3;
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display_menu();
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caca_refresh_display(dp);
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break;
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case 'b':
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case 'B':
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bounds = (bounds + 1) % 2;
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display_menu();
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caca_refresh_display(dp);
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break;
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#if 0
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case 'd':
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case 'D':
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dithering = (dithering + 1) % 5;
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caca_set_feature(cv, dithering);
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display_menu();
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caca_refresh_display(dp);
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break;
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#endif
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case 'f':
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case 'F':
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demo = demo_all;
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break;
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case '1':
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demo = demo_dots;
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break;
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case '2':
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demo = demo_lines;
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break;
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case '3':
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demo = demo_boxes;
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break;
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case '4':
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demo = demo_triangles;
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break;
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case '5':
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demo = demo_ellipses;
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break;
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#if 0
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case 's':
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case 'S':
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if(sprite)
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demo = demo_sprites;
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break;
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#endif
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case 'r':
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case 'R':
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demo = demo_render;
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break;
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}
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if(demo)
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{
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caca_set_color_ansi(cv, CACA_LIGHTGRAY, CACA_BLACK);
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caca_clear_canvas(cv);
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}
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}
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else if(caca_get_event_type(&ev) & CACA_EVENT_MOUSE_MOTION)
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{
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mouse = 1;
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xmouse = caca_get_event_mouse_x(&ev);
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ymouse = caca_get_event_mouse_y(&ev);
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}
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else if(caca_get_event_type(&ev) & CACA_EVENT_RESIZE)
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{
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mouse = 1; /* old hack */
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}
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}
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if(menu || (mouse && !demo))
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{
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display_menu();
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if(mouse && !demo)
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{
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caca_set_color_ansi(cv, CACA_RED, CACA_BLACK);
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caca_put_str(cv, xmouse, ymouse, ".");
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caca_put_str(cv, xmouse, ymouse + 1, "|\\");
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}
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caca_refresh_display(dp);
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mouse = menu = 0;
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}
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else if(demo)
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{
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demo();
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caca_set_color_ansi(cv, CACA_LIGHTGRAY, CACA_BLACK);
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caca_draw_thin_box(cv, 1, 1, caca_get_canvas_width(cv) - 2,
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caca_get_canvas_height(cv) - 2);
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caca_printf(cv, 4, 1, "[%i.%i fps]----",
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1000000 / caca_get_display_time(dp),
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(10000000 / caca_get_display_time(dp)) % 10);
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caca_refresh_display(dp);
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}
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}
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/* Clean up */
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#if 0
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caca_free_sprite(sprite);
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#endif
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caca_free_display(dp);
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caca_free_canvas(cv);
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return 0;
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}
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static void display_menu(void)
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{
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int xo = caca_get_canvas_width(cv) - 2;
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int yo = caca_get_canvas_height(cv) - 2;
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caca_set_color_ansi(cv, CACA_LIGHTGRAY, CACA_BLACK);
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caca_clear_canvas(cv);
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caca_draw_thin_box(cv, 1, 1, xo, yo);
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caca_put_str(cv, (xo - strlen("libcaca demo")) / 2, 3, "libcaca demo");
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caca_put_str(cv, (xo - strlen("==============")) / 2, 4, "==============");
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caca_put_str(cv, 4, 6, "demos:");
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caca_put_str(cv, 4, 7, "'f': full");
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caca_put_str(cv, 4, 8, "'1': dots");
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caca_put_str(cv, 4, 9, "'2': lines");
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caca_put_str(cv, 4, 10, "'3': boxes");
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caca_put_str(cv, 4, 11, "'4': triangles");
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caca_put_str(cv, 4, 12, "'5': ellipses");
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caca_put_str(cv, 4, 13, "'c': colour");
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caca_put_str(cv, 4, 14, "'r': render");
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#if 0
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if(sprite)
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caca_put_str(cv, 4, 15, "'s': sprites");
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#endif
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caca_put_str(cv, 4, 16, "settings:");
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caca_printf(cv, 4, 17, "'o': outline: %s",
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outline == 0 ? "none" : outline == 1 ? "solid" : "thin");
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caca_printf(cv, 4, 18, "'b': drawing boundaries: %s",
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bounds == 0 ? "screen" : "infinite");
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//caca_printf(cv, 4, 19, "'d': dithering (%s)",
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// caca_get_feature_name(dithering));
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caca_put_str(cv, 4, yo - 2, "'q': quit");
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//caca_refresh_display(dp);
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}
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static void demo_all(void)
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{
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static int i = 0;
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int j, xo, yo, xa, ya, xb, yb, xc, yc;
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i++;
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caca_set_color_ansi(cv, CACA_LIGHTGRAY, CACA_BLACK);
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caca_clear_canvas(cv);
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/* Draw the sun */
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caca_set_color_ansi(cv, CACA_YELLOW, CACA_BLACK);
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xo = caca_get_canvas_width(cv) / 4;
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yo = caca_get_canvas_height(cv) / 4 + 5 * sin(0.03*i);
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for(j = 0; j < 16; j++)
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{
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xa = xo - (30 + sin(0.03*i) * 8) * sin(0.03*i + M_PI*j/8);
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ya = yo + (15 + sin(0.03*i) * 4) * cos(0.03*i + M_PI*j/8);
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caca_draw_thin_line(cv, xo, yo, xa, ya);
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}
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j = 15 + sin(0.03*i) * 8;
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caca_set_color_ansi(cv, CACA_WHITE, CACA_BLACK);
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caca_fill_ellipse(cv, xo, yo, j, j / 2, '#');
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caca_set_color_ansi(cv, CACA_YELLOW, CACA_BLACK);
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caca_draw_ellipse(cv, xo, yo, j, j / 2, '#');
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/* Draw the pyramid */
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xo = caca_get_canvas_width(cv) * 5 / 8;
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yo = 2;
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xa = caca_get_canvas_width(cv) / 8 + sin(0.03*i) * 5;
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ya = caca_get_canvas_height(cv) / 2 + cos(0.03*i) * 5;
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xb = caca_get_canvas_width(cv) - 10 - cos(0.02*i) * 10;
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yb = caca_get_canvas_height(cv) * 3 / 4 - 5 + sin(0.02*i) * 5;
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xc = caca_get_canvas_width(cv) / 4 - sin(0.02*i) * 5;
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yc = caca_get_canvas_height(cv) * 3 / 4 + cos(0.02*i) * 5;
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caca_set_color_ansi(cv, CACA_GREEN, CACA_BLACK);
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caca_fill_triangle(cv, xo, yo, xb, yb, xa, ya, '%');
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caca_set_color_ansi(cv, CACA_YELLOW, CACA_BLACK);
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caca_draw_thin_triangle(cv, xo, yo, xb, yb, xa, ya);
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caca_set_color_ansi(cv, CACA_RED, CACA_BLACK);
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caca_fill_triangle(cv, xa, ya, xb, yb, xc, yc, '#');
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caca_set_color_ansi(cv, CACA_YELLOW, CACA_BLACK);
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caca_draw_thin_triangle(cv, xa, ya, xb, yb, xc, yc);
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caca_set_color_ansi(cv, CACA_BLUE, CACA_BLACK);
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caca_fill_triangle(cv, xo, yo, xb, yb, xc, yc, '%');
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caca_set_color_ansi(cv, CACA_YELLOW, CACA_BLACK);
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caca_draw_thin_triangle(cv, xo, yo, xb, yb, xc, yc);
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/* Draw a background triangle */
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xa = 2;
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ya = 2;
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xb = caca_get_canvas_width(cv) - 3;
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yb = caca_get_canvas_height(cv) / 2;
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xc = caca_get_canvas_width(cv) / 3;
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yc = caca_get_canvas_height(cv) - 3;
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caca_set_color_ansi(cv, CACA_CYAN, CACA_BLACK);
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caca_draw_thin_triangle(cv, xa, ya, xb, yb, xc, yc);
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xo = caca_get_canvas_width(cv) / 2 + cos(0.027*i) * caca_get_canvas_width(cv) / 3;
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yo = caca_get_canvas_height(cv) / 2 - sin(0.027*i) * caca_get_canvas_height(cv) / 2;
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caca_draw_thin_line(cv, xa, ya, xo, yo);
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caca_draw_thin_line(cv, xb, yb, xo, yo);
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caca_draw_thin_line(cv, xc, yc, xo, yo);
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/* Draw a sprite on the pyramid */
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#if 0
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caca_draw_sprite(cv, xo, yo, sprite, 0);
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#endif
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/* Draw a trail behind the foreground sprite */
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for(j = i - 60; j < i; j++)
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{
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int delta = caca_rand(-5, 6);
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caca_set_color_ansi(cv, caca_rand(0, 16), caca_rand(0, 16));
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caca_put_char(cv, caca_get_canvas_width(cv) / 2
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+ cos(0.02*j) * (delta + caca_get_canvas_width(cv) / 4),
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caca_get_canvas_height(cv) / 2
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+ sin(0.02*j) * (delta + caca_get_canvas_height(cv) / 3),
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'#');
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}
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/* Draw foreground sprite */
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#if 0
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caca_draw_sprite(cv, caca_get_canvas_width(cv) / 2 + cos(0.02*i) * caca_get_canvas_width(cv) / 4,
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caca_get_canvas_height(cv) / 2 + sin(0.02*i) * caca_get_canvas_height(cv) / 3,
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sprite, 0);
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#endif
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}
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static void demo_dots(void)
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{
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int xmax = caca_get_canvas_width(cv);
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int ymax = caca_get_canvas_height(cv);
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int i;
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static char chars[10] =
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{
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'+', '-', '*', '#', 'X', '@', '%', '$', 'M', 'W'
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};
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for(i = 1000; i--;)
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{
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/* Putpixel */
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caca_set_color_ansi(cv, caca_rand(0, 16), caca_rand(0, 16));
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caca_put_char(cv, caca_rand(0, xmax), caca_rand(0, ymax),
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chars[caca_rand(0, 9)]);
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}
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}
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static void demo_lines(void)
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{
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int w = caca_get_canvas_width(cv);
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int h = caca_get_canvas_height(cv);
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int xa, ya, xb, yb;
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if(bounds)
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{
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xa = caca_rand(- w, 2 * w); ya = caca_rand(- h, 2 * h);
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xb = caca_rand(- w, 2 * w); yb = caca_rand(- h, 2 * h);
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}
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else
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{
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xa = caca_rand(0, w); ya = caca_rand(0, h);
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xb = caca_rand(0, w); yb = caca_rand(0, h);
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}
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caca_set_color_ansi(cv, caca_rand(0, 16), CACA_BLACK);
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if(outline > 1)
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caca_draw_thin_line(cv, xa, ya, xb, yb);
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else
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caca_draw_line(cv, xa, ya, xb, yb, '#');
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}
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static void demo_boxes(void)
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{
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int w = caca_get_canvas_width(cv);
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int h = caca_get_canvas_height(cv);
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int xa, ya, xb, yb;
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if(bounds)
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{
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xa = caca_rand(- w, 2 * w); ya = caca_rand(- h, 2 * h);
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xb = caca_rand(- w, 2 * w); yb = caca_rand(- h, 2 * h);
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}
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else
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{
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xa = caca_rand(0, w); ya = caca_rand(0, h);
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xb = caca_rand(0, w); yb = caca_rand(0, h);
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}
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caca_set_color_ansi(cv, caca_rand(0, 16), caca_rand(0, 16));
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caca_fill_box(cv, xa, ya, xb, yb, '#');
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caca_set_color_ansi(cv, caca_rand(0, 16), CACA_BLACK);
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if(outline == 2)
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caca_draw_thin_box(cv, xa, ya, xb, yb);
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else if(outline == 1)
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caca_draw_box(cv, xa, ya, xb, yb, '#');
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}
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static void demo_ellipses(void)
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{
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int w = caca_get_canvas_width(cv);
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int h = caca_get_canvas_height(cv);
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int x, y, a, b;
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if(bounds)
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{
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x = caca_rand(- w, 2 * w); y = caca_rand(- h, 2 * h);
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a = caca_rand(0, w); b = caca_rand(0, h);
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}
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else
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{
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do
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{
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x = caca_rand(0, w); y = caca_rand(0, h);
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a = caca_rand(0, w); b = caca_rand(0, h);
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} while(x - a < 0 || x + a >= w || y - b < 0 || y + b >= h);
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}
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caca_set_color_ansi(cv, caca_rand(0, 16), caca_rand(0, 16));
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caca_fill_ellipse(cv, x, y, a, b, '#');
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caca_set_color_ansi(cv, caca_rand(0, 16), CACA_BLACK);
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if(outline == 2)
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caca_draw_thin_ellipse(cv, x, y, a, b);
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else if(outline == 1)
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caca_draw_ellipse(cv, x, y, a, b, '#');
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}
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static void demo_triangles(void)
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{
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int w = caca_get_canvas_width(cv);
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int h = caca_get_canvas_height(cv);
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int xa, ya, xb, yb, xc, yc;
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if(bounds)
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{
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xa = caca_rand(- w, 2 * w); ya = caca_rand(- h, 2 * h);
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xb = caca_rand(- w, 2 * w); yb = caca_rand(- h, 2 * h);
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xc = caca_rand(- w, 2 * w); yc = caca_rand(- h, 2 * h);
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}
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else
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{
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xa = caca_rand(0, w); ya = caca_rand(0, h);
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xb = caca_rand(0, w); yb = caca_rand(0, h);
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xc = caca_rand(0, w); yc = caca_rand(0, h);
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}
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caca_set_color_ansi(cv, caca_rand(0, 16), caca_rand(0, 16));
|
|
caca_fill_triangle(cv, xa, ya, xb, yb, xc, yc, '#');
|
|
|
|
caca_set_color_ansi(cv, caca_rand(0, 16), CACA_BLACK);
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|
if(outline == 2)
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|
caca_draw_thin_triangle(cv, xa, ya, xb, yb, xc, yc);
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else if(outline == 1)
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|
caca_draw_triangle(cv, xa, ya, xb, yb, xc, yc, '#');
|
|
}
|
|
#if 0
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|
static void demo_sprites(void)
|
|
{
|
|
|
|
caca_draw_sprite(cv, caca_rand(0, caca_get_canvas_width(cv)),
|
|
caca_rand(0, caca_get_canvas_height(cv)), sprite, 0);
|
|
|
|
}
|
|
#endif
|
|
#if 0
|
|
static void demo_render(void)
|
|
{
|
|
caca_dither_t *dither;
|
|
//short buffer[256*256];
|
|
//short *dest = buffer;
|
|
int buffer[256*256];
|
|
int *dest = buffer;
|
|
int x, y, z;
|
|
static int i = 0;
|
|
|
|
i = (i + 1) % 512;
|
|
z = i < 256 ? i : 511 - i;
|
|
|
|
for(x = 0; x < 256; x++)
|
|
for(y = 0; y < 256; y++)
|
|
{
|
|
//*dest++ = ((x >> 3) << 11) | ((y >> 2) << 5) | ((z >> 3));
|
|
*dest++ = (x << 16) | (y << 8) | (z);
|
|
}
|
|
caca_set_dither_invert(dither, 1);
|
|
//dither = caca_create_dither(16, 256, 256, 2 * 256, 0xf800, 0x07e0, 0x001f, 0x0000);
|
|
dither = caca_create_dither(32, 256, 256, 4 * 256, 0x00ff0000, 0x0000ff00, 0x000000ff, 0xff000000);
|
|
caca_dither_bitmap(cv, 0, 0, caca_get_canvas_width(cv), caca_get_canvas_height(cv),
|
|
dither, buffer);
|
|
caca_free_dither(dither);
|
|
}
|
|
#endif
|
|
|
|
static void draw_circle(int *buffer, int xo, int yo, int r, int mask, int val);
|
|
|
|
static void demo_render(void)
|
|
{
|
|
caca_dither_t *dither;
|
|
int buffer[256*256];
|
|
int *dest;
|
|
int x, y, z, xo, yo;
|
|
static int i = 0;
|
|
|
|
i++;
|
|
|
|
dest = buffer;
|
|
for(x = 0; x < 256; x++)
|
|
for(y = 0; y < 256; y++)
|
|
{
|
|
*dest++ = 0xff000000;
|
|
}
|
|
|
|
/* red */
|
|
xo = 128 + 48 * sin(0.02 * i);
|
|
yo = 128 + 48 * cos(0.03 * i);
|
|
for(z = 0; z < 240; z++)
|
|
draw_circle(buffer, xo, yo, z, 0x00ff0000, 200 << 16);
|
|
|
|
/* green */
|
|
xo = 128 + 48 * sin(2 + 0.06 * i);
|
|
yo = 128 + 48 * cos(2 + 0.05 * i);
|
|
for(z = 0; z < 240; z++)
|
|
draw_circle(buffer, xo, yo, z, 0x0000ff00, 200 << 8);
|
|
|
|
/* blue */
|
|
xo = 128 + 48 * sin(1 + 0.04 * i);
|
|
yo = 128 + 48 * cos(1 + 0.03 * i);
|
|
for(z = 0; z < 240; z++)
|
|
draw_circle(buffer, xo, yo, z, 0x000000ff, 200);
|
|
|
|
dither = caca_create_dither(32, 256, 256, 4 * 256, 0x00ff0000, 0x0000ff00, 0x000000ff, 0xff000000);
|
|
caca_set_dither_gamma(dither, -1.0);
|
|
caca_dither_bitmap(cv, 0, 0, caca_get_canvas_width(cv), caca_get_canvas_height(cv), dither, (char *)buffer);
|
|
caca_free_dither(dither);
|
|
}
|
|
|
|
static void draw_circle(int *buffer, int x, int y, int r, int mask, int val)
|
|
{
|
|
int t, dx, dy;
|
|
|
|
#define POINT(X,Y) \
|
|
buffer[(X) + 256 * (Y)] = 0xff000000 | (buffer[(X) + 256 * (Y)] & ~mask) | val;
|
|
|
|
for(t = 0, dx = 0, dy = r; dx <= dy; dx++)
|
|
{
|
|
POINT(x - dx / 3, y - dy / 3);
|
|
POINT(x + dx / 3, y - dy / 3);
|
|
POINT(x - dx / 3, y + dy / 3);
|
|
POINT(x + dx / 3, y + dy / 3);
|
|
|
|
POINT(x - dy / 3, y - dx / 3);
|
|
POINT(x + dy / 3, y - dx / 3);
|
|
POINT(x - dy / 3, y + dx / 3);
|
|
POINT(x + dy / 3, y + dx / 3);
|
|
|
|
t += t > 0 ? dx - dy-- : dx;
|
|
}
|
|
}
|
|
|