libcaca/caca-php/examples/demo.php

#!/usr/bin/php5
<?php
/*
 *  demo.php      demo for libcaca php binding
 *  Copyright (c) 2008 Nicolas Vion <nico@yojik.eu>
 *
 *  This file is a Php port of the official libcaca's sample program "demo.c"
 *  which is:
 *  Copyright (c) 2003 Sam Hocevar <sam@hocevar.net>
 *
 *  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://www.wtfpl.net/ for more details.
 */

function main() {
    $cv = caca_create_canvas(0, 0);
    if (!$cv) {
        die("Error while creating canvas\n");
    }

    $dp = caca_create_display($cv);
    if (!$dp) {
        die("Error while attaching canvas to display\n");
    }

    caca_set_display_time($dp, 40000);

    /* Disable X cursor */
    caca_set_mouse($dp, 0);

    /* Main menu */
    $bounds = $outline = $dithering = 0;

    display_menu($cv, $dp, $bounds, $outline);

    /* Go ! */
    $need_refresh = false;
    $quit = 0;
    while(!$quit) {
        while ($ev = caca_get_event($dp, CACA_EVENT_ANY, 1000)) {
            if (caca_get_event_type($ev) & CACA_EVENT_KEY_PRESS) {
                switch (caca_get_event_key_ch($ev)) {
                    case ord('q'):
                    case ord('Q'):
                    case CACA_KEY_ESCAPE:
                        $demo = false;
                        $quit = 1;
                        break;
                    case ord('o'):
                    case ord('O'):
                        $outline = ($outline + 1) % 3;
                        display_menu($cv, $dp, $bounds, $outline);
                        break;
                    case ord('b'):
                    case ord('B'):
                        $bounds = ($bounds + 1) % 2;
                        display_menu($cv, $dp, $bounds, $outline);
                        break;
                    case ord('d'):
                    case ord('D'):
                        $dithering = ($dithering + 1) % 5;
                        caca_set_feature($cv, $dithering);
                        display_menu($cv, $dp, $bounds, $outline);
                        break;
                    case ord('f'):
                    case ord('F'):
                        demo_go($dp, "demo_all", $cv, $bounds, $outline);
                        break;
                    case ord('1'):
                        demo_go($dp, "demo_dots", $cv, $bounds, $outline);
                        break;
                    case ord('2'):
                        demo_go($dp, "demo_lines", $cv, $bounds, $outline);
                        break;
                    case ord('3'):
                        demo_go($dp, "demo_boxes", $cv, $bounds, $outline);
                        break;
                    case ord('4'):
                        demo_go($dp, "demo_triangles", $cv, $bounds, $outline);
                        break;
                    case ord('5'):
                        demo_go($dp, "demo_ellipses", $cv, $bounds, $outline);
                        break;
                    case ord('s'):
                    case ord('S'):
                        demo_go($dp, "demo_sprites", $cv, $bounds, $outline);
                        break;
                    case ord('r'):
                    case ord('R'):
                        demo_go($dp, "demo_render", $cv, $bounds, $outline);
                        break;
                }
            }
            else if(caca_get_event_type($ev) & CACA_EVENT_MOUSE_MOTION) {
                $x = caca_get_event_mouse_x($ev);
                $y = caca_get_event_mouse_y($ev);
                display_menu($cv, $dp, $bounds, $outline, false);
                caca_set_color_ansi($cv, CACA_RED, CACA_BLACK);
                caca_put_str($cv, $x, $y, ".");
                caca_put_str($cv, $x, $y + 1, "|\\");
                $need_refresh = true;
            }
            else if(caca_get_event_type($ev) & CACA_EVENT_RESIZE) {
                display_menu($cv, $dp, $bounds, $outline);
            }
        }

        if ($need_refresh) {
            caca_refresh_display($dp);
            $need_refresh = false;
        }
    }
}

function display_menu($cv, $dp, $bounds, $outline, $refresh = true) {
    $xo = caca_get_canvas_width($cv) - 2;
    $yo = caca_get_canvas_height($cv) - 2;

    caca_set_color_ansi($cv, CACA_LIGHTGRAY, CACA_BLACK);
    caca_clear_canvas($cv);
    caca_draw_thin_box($cv, 1, 1, $xo, $yo);

    caca_put_str($cv, ($xo - strlen("libcaca demo")) / 2, 3, "libcaca demo");
    caca_put_str($cv, ($xo - strlen("==============")) / 2, 4, "==============");

    caca_put_str($cv, 4, 6, "demos:");
    caca_put_str($cv, 4, 7, "'f': full");
    caca_put_str($cv, 4, 8, "'1': dots");
    caca_put_str($cv, 4, 9, "'2': lines");
    caca_put_str($cv, 4, 10, "'3': boxes");
    caca_put_str($cv, 4, 11, "'4': triangles");
    caca_put_str($cv, 4, 12, "'5': ellipses");
//    caca_put_str($cv, 4, 13, "'c': colour");
//    caca_put_str($cv, 4, 14, "'r': render");

//    caca_put_str($cv, 4, 15, "'s': sprites");

    caca_put_str($cv, 4, 16, "settings:");
    caca_put_str($cv, 4, 17, "'o': outline: ".(($outline == 0) ? "none" : (($outline == 1) ? "solid" : "thin")));
    caca_put_str($cv, 4, 18, "'b': drawing boundaries: ".(($bounds == 0) ? "screen" : "infinite"));
    caca_put_str($cv, 4, $yo - 2, "'q': quit");

    if ($refresh)
        caca_refresh_display($dp);
}

function demo_go($dp, $demo, $cv, $bounds, $outline) {
    caca_set_color_ansi($cv, CACA_LIGHTGRAY, CACA_BLACK);
    caca_clear_canvas($cv);

    while (!caca_get_event($dp, CACA_EVENT_KEY_PRESS)) {
        if (function_exists($demo))
            $demo($cv, $bounds, $outline);

        caca_set_color_ansi($cv, CACA_LIGHTGRAY, CACA_BLACK);
        caca_draw_thin_box($cv, 1, 1, caca_get_canvas_width($cv) - 2, caca_get_canvas_height($cv) - 2);
        $rate = sprintf("%01.2f", 1000000 / caca_get_display_time($dp));
        caca_put_str($cv, 4, 1, "[$rate fps]----");
        caca_refresh_display($dp);
    }

    display_menu($cv, $dp, $bounds, $outline);
    caca_refresh_display($dp);
}


function demo_all($cv, $bounds, $outline) {
    global $i;

    $i++;

    caca_set_color_ansi($cv, CACA_LIGHTGRAY, CACA_BLACK);
    caca_clear_canvas($cv);

    /* Draw the sun */
    caca_set_color_ansi($cv, CACA_YELLOW, CACA_BLACK);
    $xo = caca_get_canvas_width($cv) / 4;
    $yo = caca_get_canvas_height($cv) / 4 + 5 * sin(0.03 * $i);

    for ($j = 0; $j < 16; $j++) {
        $xa = $xo - (30 + sin(0.03 * $i) * 8) * sin(0.03 * $i + M_PI * $j / 8);
        $ya = $yo + (15 + sin(0.03 * $i) * 4) * cos(0.03 * $i + M_PI * $j / 8);
        caca_draw_thin_line($cv, $xo, $yo, $xa, $ya);
    }

    $j = 15 + sin(0.03 * $i) * 8;
    caca_set_color_ansi($cv, CACA_WHITE, CACA_BLACK);
    caca_fill_ellipse($cv, $xo, $yo, $j, $j / 2, ord('#'));
    caca_set_color_ansi($cv, CACA_YELLOW, CACA_BLACK);
    caca_draw_ellipse($cv, $xo, $yo, $j, $j / 2, ord('#'));

    /* Draw the pyramid */
    $xo = caca_get_canvas_width($cv) * 5 / 8;
    $yo = 2;

    $xa = caca_get_canvas_width($cv) / 8 + sin(0.03 * $i) * 5;
    $ya = caca_get_canvas_height($cv) / 2 + cos(0.03 * $i) * 5;

    $xb = caca_get_canvas_width($cv) - 10 - cos(0.02 * $i) * 10;
    $yb = caca_get_canvas_height($cv) * 3 / 4 - 5 + sin(0.02 * $i) * 5;

    $xc = caca_get_canvas_width($cv) / 4 - sin(0.02 * $i) * 5;
    $yc = caca_get_canvas_height($cv) * 3 / 4 + cos(0.02 * $i) * 5;

    caca_set_color_ansi($cv, CACA_GREEN, CACA_BLACK);
    caca_fill_triangle($cv, $xo, $yo, $xb, $yb, $xa, $ya, ord('%'));
    caca_set_color_ansi($cv, CACA_YELLOW, CACA_BLACK);
    caca_draw_thin_triangle($cv, $xo, $yo, $xb, $yb, $xa, $ya);

    caca_set_color_ansi($cv, CACA_RED, CACA_BLACK);
    caca_fill_triangle($cv, $xa, $ya, $xb, $yb, $xc, $yc, ord('#'));
    caca_set_color_ansi($cv, CACA_YELLOW, CACA_BLACK);
    caca_draw_thin_triangle($cv, $xa, $ya, $xb, $yb, $xc, $yc);

    caca_set_color_ansi($cv, CACA_BLUE, CACA_BLACK);
    caca_fill_triangle($cv, $xo, $yo, $xb, $yb, $xc, $yc, ord('%'));
    caca_set_color_ansi($cv, CACA_YELLOW, CACA_BLACK);
    caca_draw_thin_triangle($cv, $xo, $yo, $xb, $yb, $xc, $yc);

    /* Draw a background triangle */
    $xa = 2;
    $ya = 2;

    $xb = caca_get_canvas_width($cv) - 3;
    $yb = caca_get_canvas_height($cv) / 2;

    $xc = caca_get_canvas_width($cv) / 3;
    $yc = caca_get_canvas_height($cv) - 3;

    caca_set_color_ansi($cv, CACA_CYAN, CACA_BLACK);
    caca_draw_thin_triangle($cv, $xa, $ya, $xb, $yb, $xc, $yc);

    $xo = caca_get_canvas_width($cv) / 2 + cos(0.027 * $i) * caca_get_canvas_width($cv) / 3;
    $yo = caca_get_canvas_height($cv) / 2 - sin(0.027 * $i) * caca_get_canvas_height($cv) / 2;

    caca_draw_thin_line($cv, $xa, $ya, $xo, $yo);
    caca_draw_thin_line($cv, $xb, $yb, $xo, $yo);
    caca_draw_thin_line($cv, $xc, $yc, $xo, $yo);

    /* Draw a trail behind the foreground sprite */
    for($j = $i - 60; $j < $i; $j++) {
        $delta = caca_rand(-5, 6);
        caca_set_color_ansi($cv, caca_rand(0, 16), caca_rand(0, 16));
        caca_put_char($cv,
            caca_get_canvas_width($cv) / 2 + cos(0.02 * $j) * ($delta + caca_get_canvas_width($cv) / 4),
            caca_get_canvas_height($cv) / 2 + sin(0.02 * $j) * ($delta + caca_get_canvas_height($cv) / 3),
            ord('#'));
    }
}

function demo_dots($cv, $bounds, $outline) {
    $xmax = caca_get_canvas_width($cv);
    $ymax = caca_get_canvas_height($cv);

    $chars = array('+', '-', '*', '#', 'X', '@', '%', '$', 'M', 'W');

    for ($i = 1000; $i--;) {
        /* Putpixel */
        caca_set_color_ansi($cv, caca_rand(0, 16), caca_rand(0, 16));
        caca_put_char($cv, caca_rand(0, $xmax), caca_rand(0, $ymax), ord($chars[caca_rand(0, 9)]));
    }
}

function demo_lines($cv, $bounds, $outline) {
    $w = caca_get_canvas_width($cv);
    $h = caca_get_canvas_height($cv);

    if ($bounds) {
        $xa = caca_rand(- $w, 2 * $w); $ya = caca_rand(- $h, 2 * $h);
        $xb = caca_rand(- $w, 2 * $w); $yb = caca_rand(- $h, 2 * $h);
    }
    else {
        $xa = caca_rand(0, $w); $ya = caca_rand(0, $h);
        $xb = caca_rand(0, $w); $yb = caca_rand(0, $h);
    }

    caca_set_color_ansi($cv, caca_rand(0, 16), CACA_BLACK);
    if ($outline > 1)
        caca_draw_thin_line($cv, $xa, $ya, $xb, $yb);
    else
        caca_draw_line($cv, $xa, $ya, $xb, $yb, ord('#'));
}

function demo_boxes($cv, $bounds, $outline) {
    $w = caca_get_canvas_width($cv);
    $h = caca_get_canvas_height($cv);

    if ($bounds) {
        $xa = caca_rand(- $w, 2 * $w); $ya = caca_rand(- $h, 2 * $h);
        $xb = caca_rand(- $w, 2 * $w); $yb = caca_rand(- $h, 2 * $h);
    }
    else {
        $xa = caca_rand(0, $w); $ya = caca_rand(0, $h);
        $xb = caca_rand(0, $w); $yb = caca_rand(0, $h);
    }

    caca_set_color_ansi($cv, caca_rand(0, 16), caca_rand(0, 16));
    caca_fill_box($cv, $xa, $ya, $xb, $yb, ord('#'));

    caca_set_color_ansi($cv, caca_rand(0, 16), CACA_BLACK);
    if($outline == 2)
        caca_draw_thin_box($cv, $xa, $ya, $xb, $yb);
    else if($outline == 1)
        caca_draw_box($cv, $xa, $ya, $xb, $yb, ord('#'));
}

function demo_ellipses($cv, $bounds, $outline) {
    $w = caca_get_canvas_width($cv);
    $h = caca_get_canvas_height($cv);

    if ($bounds) {
        $x = caca_rand(- $w, 2 * $w); $y = caca_rand(- $h, 2 * $h);
        $a = caca_rand(0, $w); $b = caca_rand(0, $h);
    }
    else {
        do {
            $x = caca_rand(0, $w); $y = caca_rand(0, $h);
            $a = caca_rand(0, $w); $b = caca_rand(0, $h);
        } while ($x - $a < 0 || $x + $a >= $w || $y - $b < 0 || $y + $b >= $h);
    }

    caca_set_color_ansi($cv, caca_rand(0, 16), caca_rand(0, 16));
    caca_fill_ellipse($cv, $x, $y, $a, $b, ord('#'));

    caca_set_color_ansi($cv, caca_rand(0, 16), CACA_BLACK);
    if ($outline == 2)
        caca_draw_thin_ellipse($cv, $x, $y, $a, $b);
    else if ($outline == 1)
        caca_draw_ellipse($cv, $x, $y, $a, $b, ord('#'));
}

function demo_triangles($cv, $bounds, $outline) {
    $w = caca_get_canvas_width($cv);
    $h = caca_get_canvas_height($cv);

    if ($bounds) {
        $xa = caca_rand(- $w, 2 * $w); $ya = caca_rand(- $h, 2 * $h);
        $xb = caca_rand(- $w, 2 * $w); $yb = caca_rand(- $h, 2 * $h);
        $xc = caca_rand(- $w, 2 * $w); $yc = caca_rand(- $h, 2 * $h);
    }
    else {
        $xa = caca_rand(0, $w); $ya = caca_rand(0, $h);
        $xb = caca_rand(0, $w); $yb = caca_rand(0, $h);
        $xc = caca_rand(0, $w); $yc = caca_rand(0, $h);
    }

    caca_set_color_ansi($cv, caca_rand(0, 16), caca_rand(0, 16));
    caca_fill_triangle($cv, $xa, $ya, $xb, $yb, $xc, $yc, ord('#'));

    caca_set_color_ansi($cv, caca_rand(0, 16), CACA_BLACK);
    if ($outline == 2)
        caca_draw_thin_triangle($cv, $xa, $ya, $xb, $yb, $xc, $yc);
    else if ($outline == 1)
        caca_draw_triangle($cv, $xa, $ya, $xb, $yb, $xc, $yc, ord('#'));
}

function demo_render($cv, $bounds, $outline) {
}


if (php_sapi_name() != "cli") {
    die("You have to run this program with php-cli!\n");
}

main();

?>