不用GD库生成当前时间的PNG格式图象的程序,php不用GD库生成当前时间的PNG格式图象的程序第1

 必赢亚州手机网站     |      2020-02-03 06:03

function set_4pixel($r, $g, $b, $x, $y)
{
global $sx, $sy, $pixels;

该程序是不用GD库可以生成当前时间的PNG格式图象,给人大开眼界,很有参考价值. teaman整理

$ofs = 3 * ($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($b);
}
//生成数字图象的函数
function draw2digits($x, $y, $number)
{
draw_digit($x, $y, (int) ($number / 10));
draw_digit($x + 11, $y, $number % 10);
}

?php function set_4pixel($r, $g, $b, $x, $y) { global $sx, $sy, $pixels;

function draw_digit($x, $y, $digit)
{
global $sx, $sy, $pixels, $digits, $lines;

$ofs = 3 * ($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($b); } //生成数字图象的函数 function draw2digits($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); } } } } } //将文字加入到图象中 function add_chunk($type) { global $result, $data, $chunk, $crc_table;

$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);
}
}
}
}
}

// chunk :为层 // length: 4 字节: 用来计算 chunk // chunk type: 4 字节 // chunk data: length bytes // CRC: 4 字节: 循环冗余码校验 // copy data and create CRC checksum $len = strlen($data); $chunk = pack("c*", ($len 24) 255, ($len 16) 255, ($len 8) 255, $len 255); $chunk .= $type; $chunk .= $data;

//将文字加入到图象中
function add_chunk($type)
{
global $result, $data, $chunk, $crc_table;

// calculate a CRC checksum with the bytes chunk[4..len-1] $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 :为层
// length: 4 字节: 用来计算 chunk
// chunk type: 4 字节
// chunk data: length bytes
// CRC: 4 字节: 循环冗余码校验

$chunk .= chr(($crc 24) 255); $chunk .= chr(($crc 16) 255); $chunk .= chr(($crc 8) 255); $chunk .= chr($crc 255);

// copy data and create CRC checksum
$len = strlen($data);
$chunk = pack("c*", ($len >> 24) & 255,
($len >> 16) & 255,
($len >> 8) & 255,
$len & 255);
$chunk .= $type;
$chunk .= $data;

// 将结果加到$result中 $result .= $chunk; }

// calculate a CRC checksum with the bytes chunk[4..len-1]
$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;

//主程序

$chunk .= chr(($crc >> 24) & 255);
$chunk .= chr(($crc >> 16) & 255);
$chunk .= chr(($crc >> 8) & 255);
$chunk .= chr($crc & 255);

$sx = 80; $sy = 21; $pixels = ""; // 填充 for ($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);