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Clock with Images

Digital clock. The images are generated on the fly by the script.



					
					

					<?php

					function set_4pixel($r, $g, $b, $x, $y) {

					    global $sx, $sy, $pixels;

					    $ofs = 3 * ($sx * $y + $x);

					    $pixels[$ofs] = chr($r);

					    $pixels[$ofs + 1] = chr($g);

					    $pixels[$ofs + 2] = chr($b);

					    $pixels[$ofs + 3] = chr($r);

					    $pixels[$ofs + 4] = chr($g);

					    $pixels[$ofs + 5] = chr($b);

					    $ofs += 3 * $sx;

					    $pixels[$ofs] = chr($r);

					    $pixels[$ofs + 1] = chr($g);

					    $pixels[$ofs + 2] = chr($b);

					    $pixels[$ofs + 3] = chr($r);

					    $pixels[$ofs + 4] = chr($g);

					    $pixels[$ofs + 5] = chr($b);

					}

					function draw2digits($x, $y, $number)

					{

					    draw_digit($x, $y, (int) ($number / 10));

					    draw_digit($x + 11, $y, $number % 10);

					}

					function draw_digit($x, $y, $digit)

					{

					    global $sx, $sy, $pixels, $digits, $lines;

					    $digit = $digits[$digit];

					    $m = 8;

					    for ($b = 1, $i = 0; $i < 7; $i++, $b *= 2) {

					        if (($b & $digit) == $b) {

					            $j = $i * 4;

					            $x0 = $lines[$j] * $m + $x;

					            $y0 = $lines[$j + 1] * $m + $y;

					            $x1 = $lines[$j + 2] * $m + $x;

					            $y1 = $lines[$j + 3] * $m + $y;

					            if ($x0 == $x1) {

					                $ofs = 3 * ($sx * $y0 + $x0);

					                for ($h = $y0; $h <= $y1; $h++, $ofs += 3 * $sx) {

					                    $pixels[$ofs] = chr(0);

					                    $pixels[$ofs + 1] = chr(0);

					                    $pixels[$ofs + 2] = chr(0);

					                }

					                } else {

					                $ofs = 3 * ($sx * $y0 + $x0);

					                for ($w = $x0; $w <= $x1; $w++) {

					                    $pixels[$ofs++] = chr(0);

					                    $pixels[$ofs++] = chr(0);

					                    $pixels[$ofs++] = chr(0);

					                }

					            }

					        }

					    }

					}

					function add_chunk($type)

					{

					    global $result, $data, $chunk, $crc_table;

					    $len = strlen($data);

					    $chunk = pack("c*", ($len >> 24) & 255,

					    ($len >> 16) & 255,

					    ($len >> 8) & 255,

					    $len & 255);

					    $chunk .= $type;

					    $chunk .= $data;

					    $z = 16777215;

					    $z |= 255 << 24;

					    $c = $z;

					    for ($n = 4; $n < strlen($chunk); $n++) {

					        $c8 = ($c >> 8) & 0xffffff;

					        $c = $crc_table[($c ^ ord($chunk[$n])) & 0xff] ^ $c8;

					    }

					    $crc = $c ^ $z;

					    $chunk .= chr(($crc >> 24) & 255);

					    $chunk .= chr(($crc >> 16) & 255);

					    $chunk .= chr(($crc >> 8) & 255);

					    $chunk .= chr($crc & 255);

					    $result .= $chunk;

					}

					$sx = 80;

					$sy = 21;

					$pixels = "";

					for ($h = 0; $h < $sy; $h++) {

					    for ($w = 0; $w < $sx; $w++) {

					        $r = 100 / $sx * $w + 155;

					        $g = 100 / $sy * $h + 155;

					        $b = 255 - (100 / ($sx + $sy) * ($w + $h));

					        $pixels .= chr($r);

					        $pixels .= chr($g);

					        $pixels .= chr($b);

					    }

					}

					

					$date = getdate();

					$s = $date["seconds"];

					$m = $date["minutes"];

					$h = $date["hours"];

					$digits = array(95, 5, 118, 117, 45, 121, 123, 69, 127, 125);

					$lines = array(1, 1, 1, 2, 0, 1, 0, 2, 1, 0, 1, 1, 0, 0, 0, 1, 0, 2, 1, 2, 0, 1, 1, 1, 0, 0, 1, 0);

					draw2digits(4, 2, $h);

					draw2digits(30, 2, $m);

					draw2digits(56, 2, $s);

					set_4pixel(0, 0, 0, 26, 7);

					set_4pixel(0, 0, 0, 26, 13);

					set_4pixel(0, 0, 0, 52, 7);

					set_4pixel(0, 0, 0, 52, 13);

					$z = -306674912; // = 0xedb88320

					for ($n = 0; $n < 256; $n++) {

					    $c = $n;

					    for ($k = 0; $k < 8; $k++) {

					        $c2 = ($c >> 1) & 0x7fffffff;

					        if ($c & 1) $c = $z ^ ($c2); else $c = $c2;

					    }

					    $crc_table[$n] = $c;

					}

					$result = pack("c*", 137,80,78,71,13,10,26,10);

					$data = pack("c*", ($sx >> 24) & 255,

					($sx >> 16) & 255,

					($sx >> 8) & 255,

					$sx & 255,

					($sy >> 24) & 255,

					($sy >> 16) & 255,

					($sy >> 8) & 255,

					$sy & 255,

					8,

					2,

					0,

					0,

					0);

					add_chunk("IHDR");

					$len = ($sx * 3 + 1) * $sy;

					$data = pack("c*", 0x78, 0x01,

					1,

					$len & 255,

					($len >> 8) & 255,

					255 - ($len & 255),

					255 - (($len >> 8) & 255));

					$start = strlen($data);

					$i2 = 0;

					for ($h = 0; $h < $sy; $h++) {

					    $data .= chr(0);

					    for ($w = 0; $w < $sx * 3; $w++) {

					        $data .= $pixels[$i2++];

					    }

					}

					$s1 = 1;

					$s2 = 0;

					for ($n = $start; $n < strlen($data); $n++) {

					    $s1 = ($s1 + ord($data[$n])) % 65521;

					    $s2 = ($s2 + $s1) % 65521;

					}

					$adler = ($s2 << 16) | $s1;

					$data .= chr(($adler >> 24) & 255);

					$data .= chr(($adler >> 16) & 255);

					$data .= chr(($adler >> 8) & 255);

					$data .= chr($adler & 255);

					add_chunk("IDAT");

					$data = "";

					add_chunk("IEND");

					header("Content-type: image/png");

					print($result);

					?>

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