cacalabs
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libcaca
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libcaca/examples/demo.c

568 satır
15 KiB
Ham Suçlama Geçmiş 

  1. /*

  2.  *   demo          demo using libcaca

  3.  *   Copyright (c) 2003 Sam Hocevar <sam@zoy.org>

  4.  *                 All Rights Reserved

  5.  *

  6.  *   $Id$

  7.  *

  8.  *   This program is free software; you can redistribute it and/or

  9.  *   modify it under the terms of the GNU Lesser General Public

  10.  *   License as published by the Free Software Foundation; either

  11.  *   version 2 of the License, or (at your option) any later version.

  12.  *

  13.  *   This program is distributed in the hope that it will be useful,

  14.  *   but WITHOUT ANY WARRANTY; without even the implied warranty of

  15.  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  16.  *   Lesser General Public License for more details.

  17.  *

  18.  *   You should have received a copy of the GNU Lesser General Public

  19.  *   License along with this program; if not, write to the Free Software

  20.  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA

  21.  *   02111-1307  USA

  22.  */

  23. 

  24. #include "config.h"

  25. 

  26. #include <math.h>

  27. #include <string.h>

  28. #include <stdio.h>

  29. 

  30. #include "caca.h"

  31. 

  32. static void display_menu(void);

  33. 

  34. static void demo_all(void);

  35. 

  36. static void demo_color(void);

  37. static void demo_dots(void);

  38. static void demo_lines(void);

  39. static void demo_boxes(void);

  40. static void demo_ellipses(void);

  41. static void demo_triangles(void);

  42. static void demo_sprites(void);

  43. static void demo_render(void);

  44. 

  45. int bounds = 0;

  46. int outline = 0;

  47. int dithering = 0;

  48. struct caca_sprite *sprite = NULL;

  49. 

  50. int main(int argc, char **argv)

  51. {

  52.     void (*demo)(void) = NULL;

  53.     int quit = 0;

  54. 

  55.     if(caca_init())

  56.         return 1;

  57. 

  58.     caca_set_delay(40000);

  59. 

  60.     /* Initialize data */

  61.     sprite = caca_load_sprite(DATADIR "/caca.txt");

  62.     if(!sprite)

  63.         sprite = caca_load_sprite("caca.txt");

  64.     if(!sprite)

  65.         sprite = caca_load_sprite("examples/caca.txt");

  66. 

  67.     /* Main menu */

  68.     display_menu();

  69.     caca_refresh();

  70. 

  71.     /* Go ! */

  72.     while(!quit)

  73.     {

  74.         int event = caca_get_event();

  75. 

  76.         if(event && demo)

  77.         {

  78.             display_menu();

  79.             caca_refresh();

  80.             demo = NULL;

  81.         }

  82.         else if(event & CACA_EVENT_KEY_PRESS)

  83.         {

  84.         handle_key:

  85.             switch(event & 0xffff)

  86.             {

  87.             case 'q':

  88.             case 'Q':

  89.                 demo = NULL;

  90.                 quit = 1;

  91.                 break;

  92.             case 'o':

  93.             case 'O':

  94.                 outline = (outline + 1) % 3;

  95.                 display_menu();

  96.                 break;

  97.             case 'b':

  98.             case 'B':

  99.                 bounds = (bounds + 1) % 2;

  100.                 display_menu();

  101.                 break;

  102.             case 'd':

  103.             case 'D':

  104.                 dithering = (dithering + 1) % 5;

  105.                 caca_set_dithering(dithering);

  106.                 display_menu();

  107.                 break;

  108.             case 'c':

  109.                 demo = demo_color;

  110.                 break;

  111.             case 'f':

  112.             case 'F':

  113.                 demo = demo_all;

  114.                 break;

  115.             case '1':

  116.                 demo = demo_dots;

  117.                 break;

  118.             case '2':

  119.                 demo = demo_lines;

  120.                 break;

  121.             case '3':

  122.                 demo = demo_boxes;

  123.                 break;

  124.             case '4':

  125.                 demo = demo_triangles;

  126.                 break;

  127.             case '5':

  128.                 demo = demo_ellipses;

  129.                 break;

  130.             case 's':

  131.             case 'S':

  132.                 if(sprite)

  133.                     demo = demo_sprites;

  134.             case 'r':

  135.             case 'R':

  136.                 demo = demo_render;

  137.                 break;

  138.             }

  139. 

  140.         handle_event:

  141.             event = caca_get_event();

  142.             if(event & CACA_EVENT_KEY_PRESS)

  143.                 goto handle_key;

  144.             else if(event)

  145.                 goto handle_event;

  146. 

  147.             caca_refresh();

  148. 

  149.             if(demo)

  150.                 caca_clear();

  151.         }

  152.         else if(event & CACA_EVENT_MOUSE_CLICK)

  153.         {

  154.             display_menu();

  155.             caca_set_color(CACA_COLOR_RED, CACA_COLOR_BLACK);

  156.             caca_putstr((event & 0xff00) >> 8, event & 0xff, "|\\");

  157.             caca_refresh();

  158.         }

  159. 

  160.         if(demo)

  161.         {

  162.             demo();

  163. 

  164.             caca_set_color(CACA_COLOR_LIGHTGRAY, CACA_COLOR_BLACK);

  165.             caca_draw_thin_box(1, 1, caca_get_width() - 2, caca_get_height() - 2);

  166.             caca_printf(4, 1, "[%i.%i fps]----",

  167.                             1000000 / caca_get_rendertime(),

  168.                             (10000000 / caca_get_rendertime()) % 10);

  169.             caca_refresh();

  170.         }

  171.     }

  172. 

  173.     /* Clean up */

  174.     caca_free_sprite(sprite);

  175.     caca_end();

  176. 

  177.     return 0;

  178. }

  179. 

  180. static void display_menu(void)

  181. {

  182.     int xo = caca_get_width() - 2;

  183.     int yo = caca_get_height() - 2;

  184. 

  185.     caca_clear();

  186.     caca_set_color(CACA_COLOR_LIGHTGRAY, CACA_COLOR_BLACK);

  187.     caca_draw_thin_box(1, 1, xo, yo);

  188. 

  189.     caca_putstr((xo - strlen("libcaca demo")) / 2, 3, "libcaca demo");

  190.     caca_putstr((xo - strlen("==============")) / 2, 4, "==============");

  191. 

  192.     caca_putstr(4, 6, "demos:");

  193.     caca_putstr(4, 7, "'f': full");

  194.     caca_putstr(4, 8, "'1': dots");

  195.     caca_putstr(4, 9, "'2': lines");

  196.     caca_putstr(4, 10, "'3': boxes");

  197.     caca_putstr(4, 11, "'4': triangles");

  198.     caca_putstr(4, 12, "'5': ellipses");

  199.     caca_putstr(4, 13, "'c': colour");

  200.     caca_putstr(4, 14, "'r': render");

  201.     if(sprite)

  202.         caca_putstr(4, 15, "'s': sprites");

  203. 

  204.     caca_putstr(4, 16, "settings:");

  205.     caca_printf(4, 17, "'o': outline: %s",

  206.               outline == 0 ? "none" : outline == 1 ? "solid" : "thin");

  207.     caca_printf(4, 18, "'b': drawing boundaries: %s",

  208.               bounds == 0 ? "screen" : "infinite");

  209.     caca_printf(4, 19, "'d': dithering (%s)",

  210.                 caca_get_dithering_name(dithering));

  211. 

  212.     caca_putstr(4, yo - 2, "'q': quit");

  213. }

  214. 

  215. static void demo_all(void)

  216. {

  217.     static int i = 0;

  218. 

  219.     int j, xo, yo, xa, ya, xb, yb, xc, yc;

  220. 

  221.     i++;

  222. 

  223.     caca_clear();

  224. 

  225.     /* Draw the sun */

  226.     caca_set_color(CACA_COLOR_YELLOW, CACA_COLOR_BLACK);

  227.     xo = caca_get_width() / 4;

  228.     yo = caca_get_height() / 4 + 5 * sin(0.03*i);

  229. 

  230.     for(j = 0; j < 16; j++)

  231.     {

  232.         xa = xo - (30 + sin(0.03*i) * 8) * sin(0.03*i + M_PI*j/8);

  233.         ya = yo + (15 + sin(0.03*i) * 4) * cos(0.03*i + M_PI*j/8);

  234.         caca_draw_thin_line(xo, yo, xa, ya);

  235.     }

  236. 

  237.     j = 15 + sin(0.03*i) * 8;

  238.     caca_set_color(CACA_COLOR_WHITE, CACA_COLOR_BLACK);

  239.     caca_fill_ellipse(xo, yo, j, j / 2, '#');

  240.     caca_set_color(CACA_COLOR_YELLOW, CACA_COLOR_BLACK);

  241.     caca_draw_ellipse(xo, yo, j, j / 2, '#');

  242. 

  243.     /* Draw the pyramid */

  244.     xo = caca_get_width() * 5 / 8;

  245.     yo = 2;

  246. 

  247.     xa = caca_get_width() / 8 + sin(0.03*i) * 5;

  248.     ya = caca_get_height() / 2 + cos(0.03*i) * 5;

  249. 

  250.     xb = caca_get_width() - 10 - cos(0.02*i) * 10;

  251.     yb = caca_get_height() * 3 / 4 - 5 + sin(0.02*i) * 5;

  252. 

  253.     xc = caca_get_width() / 4 - sin(0.02*i) * 5;

  254.     yc = caca_get_height() * 3 / 4 + cos(0.02*i) * 5;

  255. 

  256.     caca_set_color(CACA_COLOR_GREEN, CACA_COLOR_BLACK);

  257.     caca_fill_triangle(xo, yo, xb, yb, xa, ya, '%');

  258.     caca_set_color(CACA_COLOR_YELLOW, CACA_COLOR_BLACK);

  259.     caca_draw_thin_triangle(xo, yo, xb, yb, xa, ya);

  260. 

  261.     caca_set_color(CACA_COLOR_RED, CACA_COLOR_BLACK);

  262.     caca_fill_triangle(xa, ya, xb, yb, xc, yc, '#');

  263.     caca_set_color(CACA_COLOR_YELLOW, CACA_COLOR_BLACK);

  264.     caca_draw_thin_triangle(xa, ya, xb, yb, xc, yc);

  265. 

  266.     caca_set_color(CACA_COLOR_BLUE, CACA_COLOR_BLACK);

  267.     caca_fill_triangle(xo, yo, xb, yb, xc, yc, '%');

  268.     caca_set_color(CACA_COLOR_YELLOW, CACA_COLOR_BLACK);

  269.     caca_draw_thin_triangle(xo, yo, xb, yb, xc, yc);

  270. 

  271.     /* Draw a background triangle */

  272.     xa = 2;

  273.     ya = 2;

  274. 

  275.     xb = caca_get_width() - 3;

  276.     yb = caca_get_height() / 2;

  277. 

  278.     xc = caca_get_width() / 3;

  279.     yc = caca_get_height() - 3;

  280. 

  281.     caca_set_color(CACA_COLOR_CYAN, CACA_COLOR_BLACK);

  282.     caca_draw_thin_triangle(xa, ya, xb, yb, xc, yc);

  283. 

  284.     xo = caca_get_width() / 2 + cos(0.027*i) * caca_get_width() / 3;

  285.     yo = caca_get_height() / 2 - sin(0.027*i) * caca_get_height() / 2;

  286. 

  287.     caca_draw_thin_line(xa, ya, xo, yo);

  288.     caca_draw_thin_line(xb, yb, xo, yo);

  289.     caca_draw_thin_line(xc, yc, xo, yo);

  290. 

  291.     /* Draw a sprite on the pyramid */

  292.     caca_draw_sprite(xo, yo, sprite, 0);

  293. 

  294.     /* Draw a trail behind the foreground sprite */

  295.     for(j = i - 60; j < i; j++)

  296.     {

  297.         int delta = caca_rand(-5, 5);

  298.         caca_set_color(caca_rand(0, 15), caca_rand(0, 15));

  299.         caca_putchar(caca_get_width() / 2

  300.                     + cos(0.02*j) * (delta + caca_get_width() / 4),

  301.                    caca_get_height() / 2

  302.                     + sin(0.02*j) * (delta + caca_get_height() / 3),

  303.                    '#');

  304.     }

  305. 

  306.     /* Draw foreground sprite */

  307.     caca_draw_sprite(caca_get_width() / 2 + cos(0.02*i) * caca_get_width() / 4,

  308.                    caca_get_height() / 2 + sin(0.02*i) * caca_get_height() / 3,

  309.                    sprite, 0);

  310. }

  311. 

  312. static void demo_dots(void)

  313. {

  314.     int xmax = caca_get_width() - 1;

  315.     int ymax = caca_get_height() - 1;

  316.     int i;

  317.     static char chars[10] =

  318.     {

  319.         '+', '-', '*', '#', 'X', '@', '%', '$', 'M', 'W'

  320.     };

  321. 

  322.     for(i = 1000; i--;)

  323.     {

  324.         /* Putpixel */

  325.         caca_set_color(caca_rand(0, 15), caca_rand(0, 15));

  326.         caca_putchar(caca_rand(0, xmax), caca_rand(0, ymax),

  327.                      chars[caca_rand(0, 9)]);

  328.     }

  329. }

  330. 

  331. static void demo_color(void)

  332. {

  333.     int i, j;

  334.     char buf[BUFSIZ];

  335. 

  336.     caca_clear();

  337.     for(i = 0; i < 16; i++)

  338.     {

  339.         sprintf(buf, "'%c': %i (%s)", 'a' + i, i, caca_get_color_name(i));

  340.         caca_set_color(CACA_COLOR_LIGHTGRAY, CACA_COLOR_BLACK);

  341.         caca_putstr(4, i + (i >= 8 ? 4 : 3), buf);

  342.         for(j = 0; j < 16; j++)

  343.         {

  344.             caca_set_color(i, j);

  345.             caca_putstr((j >= 8 ? 41 : 40) + j * 2, i + (i >= 8 ? 4 : 3), "# ");

  346.         }

  347.     }

  348. }

  349. 

  350. static void demo_lines(void)

  351. {

  352.     int w = caca_get_width();

  353.     int h = caca_get_height();

  354.     int xa, ya, xb, yb;

  355. 

  356.     if(bounds)

  357.     {

  358.         xa = caca_rand(- w, 2 * w); ya = caca_rand(- h, 2 * h);

  359.         xb = caca_rand(- w, 2 * w); yb = caca_rand(- h, 2 * h);

  360.     }

  361.     else

  362.     {

  363.         xa = caca_rand(0, w - 1); ya = caca_rand(0, h - 1);

  364.         xb = caca_rand(0, w - 1); yb = caca_rand(0, h - 1);

  365.     }

  366. 

  367.     caca_set_color(caca_rand(0, 15), CACA_COLOR_BLACK);

  368.     if(outline > 1)

  369.         caca_draw_thin_line(xa, ya, xb, yb);

  370.     else

  371.         caca_draw_line(xa, ya, xb, yb, '#');

  372. }

  373. 

  374. static void demo_boxes(void)

  375. {

  376.     int w = caca_get_width();

  377.     int h = caca_get_height();

  378.     int xa, ya, xb, yb;

  379. 

  380.     if(bounds)

  381.     {

  382.         xa = caca_rand(- w, 2 * w); ya = caca_rand(- h, 2 * h);

  383.         xb = caca_rand(- w, 2 * w); yb = caca_rand(- h, 2 * h);

  384.     }

  385.     else

  386.     {

  387.         xa = caca_rand(0, w - 1); ya = caca_rand(0, h - 1);

  388.         xb = caca_rand(0, w - 1); yb = caca_rand(0, h - 1);

  389.     }

  390. 

  391.     caca_set_color(caca_rand(0, 15), caca_rand(0, 15));

  392.     caca_fill_box(xa, ya, xb, yb, '#');

  393. 

  394.     caca_set_color(caca_rand(0, 15), CACA_COLOR_BLACK);

  395.     if(outline == 2)

  396.         caca_draw_thin_box(xa, ya, xb, yb);

  397.     else if(outline == 1)

  398.         caca_draw_box(xa, ya, xb, yb, '#');

  399. }

  400. 

  401. static void demo_ellipses(void)

  402. {

  403.     int w = caca_get_width();

  404.     int h = caca_get_height();

  405.     int x, y, a, b;

  406. 

  407.     if(bounds)

  408.     {

  409.         x = caca_rand(- w, 2 * w); y = caca_rand(- h, 2 * h);

  410.         a = caca_rand(0, w); b = caca_rand(0, h);

  411.     }

  412.     else

  413.     {

  414.         do

  415.         {

  416.             x = caca_rand(0, w); y = caca_rand(0, h);

  417.             a = caca_rand(0, w); b = caca_rand(0, h);

  418. 

  419.         } while(x - a < 0 || x + a >= w || y - b < 0 || y + b >= h);

  420.     }

  421. 

  422.     caca_set_color(caca_rand(0, 15), caca_rand(0, 15));

  423.     caca_fill_ellipse(x, y, a, b, '#');

  424. 

  425.     caca_set_color(caca_rand(0, 15), CACA_COLOR_BLACK);

  426.     if(outline == 2)

  427.         caca_draw_thin_ellipse(x, y, a, b);

  428.     else if(outline == 1)

  429.         caca_draw_ellipse(x, y, a, b, '#');

  430. }

  431. 

  432. static void demo_triangles(void)

  433. {

  434.     int w = caca_get_width();

  435.     int h = caca_get_height();

  436.     int xa, ya, xb, yb, xc, yc;

  437. 

  438.     if(bounds)

  439.     {

  440.         xa = caca_rand(- w, 2 * w); ya = caca_rand(- h, 2 * h);

  441.         xb = caca_rand(- w, 2 * w); yb = caca_rand(- h, 2 * h);

  442.         xc = caca_rand(- w, 2 * w); yc = caca_rand(- h, 2 * h);

  443.     }

  444.     else

  445.     {

  446. 

  447.         xa = caca_rand(0, w - 1); ya = caca_rand(0, h - 1);

  448.         xb = caca_rand(0, w - 1); yb = caca_rand(0, h - 1);

  449.         xc = caca_rand(0, w - 1); yc = caca_rand(0, h - 1);

  450.     }

  451. 

  452.     caca_set_color(caca_rand(0, 15), caca_rand(0, 15));

  453.     caca_fill_triangle(xa, ya, xb, yb, xc, yc, '#');

  454. 

  455.     caca_set_color(caca_rand(0, 15), CACA_COLOR_BLACK);

  456.     if(outline == 2)

  457.         caca_draw_thin_triangle(xa, ya, xb, yb, xc, yc);

  458.     else if(outline == 1)

  459.         caca_draw_triangle(xa, ya, xb, yb, xc, yc, '#');

  460. }

  461. 

  462. static void demo_sprites(void)

  463. {

  464.     caca_draw_sprite(caca_rand(0, caca_get_width() - 1),

  465.                    caca_rand(0, caca_get_height() - 1), sprite, 0);

  466. }

  467. 

  468. #if 0

  469. static void demo_render(void)

  470. {

  471.     struct caca_bitmap *bitmap;

  472.     //short buffer[256*256];

  473.     //short *dest = buffer;

  474.     int buffer[256*256];

  475.     int *dest = buffer;

  476.     int x, y, z;

  477.     static int i = 0;

  478. 

  479.     i = (i + 1) % 512;

  480.     z = i < 256 ? i : 511 - i;

  481. 

  482.     for(x = 0; x < 256; x++)

  483.         for(y = 0; y < 256; y++)

  484.     {

  485.         //*dest++ = ((x >> 3) << 11) | ((y >> 2) << 5) | ((z >> 3));

  486.         *dest++ = (x << 16) | (y << 8) | (z);

  487.     }

  488. 

  489.     //bitmap = caca_create_bitmap(16, 256, 256, 2 * 256, 0xf800, 0x07e0, 0x001f, 0x0000);

  490.     bitmap = caca_create_bitmap(32, 256, 256, 4 * 256, 0x00ff0000, 0x0000ff00, 0x000000ff, 0xff000000);

  491.     caca_draw_bitmap(0, 0, caca_get_width() - 1, caca_get_height() - 1,

  492.                      bitmap, buffer);

  493.     caca_free_bitmap(bitmap);

  494. }

  495. #endif

  496. 

  497. static void draw_circle(int *buffer, int xo, int yo, int r, int mask, int val);

  498. 

  499. static void demo_render(void)

  500. {

  501.     struct caca_bitmap *bitmap;

  502.     int buffer[256*256];

  503.     int *dest;

  504.     int x, y, z, t, xo, yo;

  505.     static int i = 0;

  506. 

  507.     i++;

  508. 

  509.     dest = buffer;

  510.     for(x = 0; x < 256; x++)

  511.         for(y = 0; y < 256; y++)

  512.     {

  513.         *dest++ = 0;

  514.     }

  515. 

  516.     /* red */

  517.     xo = 128 + 48 * sin(0.02 * i);

  518.     yo = 128 + 48 * cos(0.03 * i);

  519.     t = 256 * (2.0 + sin(4 + 0.017 * i)) / 3;

  520.     for(z = 0; z < 240; z++)

  521.         draw_circle(buffer, xo, yo, z, 0x00ff0000,

  522.                     ((255 - z) * t / 256) << 16);

  523. 

  524.     /* green */

  525.     xo = 128 + 48 * sin(2 + 0.06 * i);

  526.     yo = 128 + 48 * cos(2 + 0.05 * i);

  527.     t = 256 * (2.0 + sin(8 + 0.021 * i)) / 3;

  528.     for(z = 0; z < 240; z++)

  529.         draw_circle(buffer, xo, yo, z, 0x0000ff00,

  530.                     ((255 - z) * t / 256) << 8);

  531. 

  532.     /* blue */

  533.     xo = 128 + 48 * sin(1 + 0.04 * i);

  534.     yo = 128 + 48 * cos(1 + 0.03 * i);

  535.     t = 256 * (2.0 + sin(3 + 0.033 * i)) / 3;

  536.     for(z = 0; z < 240; z++)

  537.         draw_circle(buffer, xo, yo, z, 0x000000ff, (255 - z) * t / 256);

  538. 

  539.     bitmap = caca_create_bitmap(32, 256, 256, 4 * 256, 0x00ff0000, 0x0000ff00, 0x000000ff, 0xff000000);

  540.     caca_draw_bitmap(0, 0, caca_get_width() - 1, caca_get_height() - 1,

  541.                      bitmap, (char *)buffer);

  542.     caca_free_bitmap(bitmap);

  543. }

  544. 

  545. static void draw_circle(int *buffer, int x, int y, int r, int mask, int val)

  546. {

  547.     int t, dx, dy;

  548. 

  549. #define POINT(X,Y) \

  550.     buffer[(X) + 256 * (Y)] = (buffer[(X) + 256 * (Y)] & ~mask) | val;

  551. 

  552.     for(t = 0, dx = 0, dy = r; dx <= dy; dx++)

  553.     {

  554.         POINT(x - dx / 3, y - dy / 3);

  555.         POINT(x + dx / 3, y - dy / 3);

  556.         POINT(x - dx / 3, y + dy / 3);

  557.         POINT(x + dx / 3, y + dy / 3);

  558. 

  559.         POINT(x - dy / 3, y - dx / 3);

  560.         POINT(x + dy / 3, y - dx / 3);

  561.         POINT(x - dy / 3, y + dx / 3);

  562.         POINT(x + dy / 3, y + dx / 3);

  563. 

  564.         t += t > 0 ? dx - dy-- : dx;

  565.     }

  566. }