/*
* PNG圖片接口文件
*
* 這不是一個(gè)免費(fèi)程序
*
* @開發(fā)時(shí)間：20080109
* @開發(fā)者：張旭 [email]cszx2007@gmail.com[/email]
* @版本：1.0
* @版權(quán)：張旭持有
*/
interface zxpngInterface
{
??? /*生成圖片(圖片寬度, 圖片高度, 圖片內(nèi)容)*/
??? function build($width, $height, $content);
}
/*
* PNG圖片生成程序
*
* 這不是一個(gè)免費(fèi)程序
*
* @開發(fā)時(shí)間：2008年1月8日 18:14
* @開發(fā)者：zx
* @版本：1.0
* @版權(quán)：張旭持有
*/
class zxpng implements zxpngInterface
{
??? private $kernel;
??? /*
??? * 庫主控文件
??? *
??? * @var kernel
??? * @access private
??? */
??? private $status;
??? /*
??? * 處理狀態(tài)說明
??? *
??? * @var bool
??? * @access private
??? */
???
??? private $info;
??? /*
??? * png圖片信息集合
??? *
??? * @var array
??? * @access private
??? */
???
??? public function __construct($kernel)
??? {
??????? $this->kernel = &$kernel;
??? }
???
??? /*生成圖片(圖片寬度, 圖片高度, 圖片內(nèi)容)*/
??? public function build($width, $height, $content)
??? {
??????? self::createBackground($width, $height);
??????? $contentLength = strlen($content);
??????? $table = self::table( );
??????? $space = 12;
???????
??????? for($i = 0; $i ??????? {
??????????? self::draw($table[$content[$i]], $width, $height, $space);
??????????? $space += 12;
??????? }
???????
??????? self::crcTable( );
??????? $data = self::headTag( );
??????? $data .= self::ihdr($width, $height);
??????? $data .= self::idat($width, $height);
??????? $data .= self::iend( );
??????? return($data);
??? }
???
??? /*創(chuàng)建背景顏色(寬度, 高度)*/
??? private function createBackground($width, $height)
??? {
??????? $rnd1 = mt_rand(90, 0);
??????? $rnd2 = mt_rand(90, 0);
??????? $rnd3 = mt_rand(90, 0);
??????? $data = '';
???????
??????? for($i = 0; $i ??????? {
??????????? for($j = 0; $j ??????????? {
??????????????? $data .= chr((($i * $j) + $width + $height + $rnd1) & 255) . chr($rnd2 & 255) . chr($rnd3 & 255);
??????????? }
??????? }
??????? return(self::save('img', $data));
??? }
???
??? /*繪制像素點(diǎn)(x, y, 寬度, 高度, r, g, b, 像素大小)*/
??? private function drawPixel($x, $y, $width, $height, $r=0, $g=0, $b=0, $size=1)
??? {
??????? $img = self::read('img');
??????? $offset = 3 * ($width * $y + $x);
???????
??????? for($i = 0; $i ??????? {
??????????? $img[$offset + $i] = chr($r);
??????????? $i++;
??????????? $img[$offset + $i] = chr($g);
??????????? $i++;
??????????? $img[$offset + $i] = chr($b);
??????????? $i++;
??????? }
???????
??????? return(self::save('img', $img));
??? }
???
??? /*繪制字符(字模, 寬度, 高度, 間隔)*/
??? private function draw($table, $width, $height, $space=16)
??? {
??????? for($i = 0; $i ??????? {
??????????? for($j = 0; $j ??????????? {
??????????????? if(($table[$i] >> (7 - $j)) & 0x01)
??????????????? {
??????????????????? self::drawPixel($space + $j, $i + 2, $width, $height, 255, 255, 255, 1);
??????????????? }
??????????? }
??????? }
???????
??????? return(true);
??? }
???
??? /*ascii碼字模表*/
??? private function table( )
??? {
??????? $ascii = array
??????????????? (
??????????????????? '0' => array(0x00,0x00,0x38,0x6C,0xC6,0xC6,0xD6,0xD6,0xC6,0xC6,0x6C,0x38,0x00,0x00,0x00,0x00),
??????????????????? '1' => array(0x00,0x00,0x18,0x38,0x78,0x18,0x18,0x18,0x18,0x18,0x18,0x7E,0x00,0x00,0x00,0x00),
??????????????????? '2' => array(0x00,0x00,0x7C,0xC6,0x06,0x0C,0x18,0x30,0x60,0xC0,0xC6,0xFE,0x00,0x00,0x00,0x00),
??????????????????? '3' => array(0x00,0x00,0x7C,0xC6,0x06,0x06,0x3C,0x06,0x06,0x06,0xC6,0x7C,0x00,0x00,0x00,0x00),
??????????????????? '4' => array(0x00,0x00,0x0C,0x1C,0x3C,0x6C,0xCC,0xFE,0x0C,0x0C,0x0C,0x1E,0x00,0x00,0x00,0x00),
??????????????????? '5' => array(0x00,0x00,0xFE,0xC0,0xC0,0xC0,0xFC,0x06,0x06,0x06,0xC6,0x7C,0x00,0x00,0x00,0x00),
??????????????????? '6' => array(0x00,0x00,0x38,0x60,0xC0,0xC0,0xFC,0xC6,0xC6,0xC6,0xC6,0x7C,0x00,0x00,0x00,0x00),
??????????????????? '7' => array(0x00,0x00,0xFE,0xC6,0x06,0x06,0x0C,0x18,0x30,0x30,0x30,0x30,0x00,0x00,0x00,0x00),
??????????????????? '8' => array(0x00,0x00,0x7C,0xC6,0xC6,0xC6,0x7C,0xC6,0xC6,0xC6,0xC6,0x7C,0x00,0x00,0x00,0x00),
??????????????????? '9' => array(0x00,0x00,0x7C,0xC6,0xC6,0xC6,0x7E,0x06,0x06,0x06,0x0C,0x78,0x00,0x00,0x00,0x00),
??????????????????? 'A' => array(0x00,0x00,0x10,0x38,0x6C,0xC6,0xC6,0xFE,0xC6,0xC6,0xC6,0xC6,0x00,0x00,0x00,0x00),
??????????????????? 'B' => array(0x00,0x00,0xFC,0x66,0x66,0x66,0x7C,0x66,0x66,0x66,0x66,0xFC,0x00,0x00,0x00,0x00),
??????????????????? 'C' => array(0x00,0x00,0x3C,0x66,0xC2,0xC0,0xC0,0xC0,0xC0,0xC2,0x66,0x3C,0x00,0x00,0x00,0x00),
??????????????????? 'D' => array(0x00,0x00,0xF8,0x6C,0x66,0x66,0x66,0x66,0x66,0x66,0x6C,0xF8,0x00,0x00,0x00,0x00),
??????????????????? 'E' => array(0x00,0x00,0xFE,0x66,0x62,0x68,0x78,0x68,0x60,0x62,0x66,0xFE,0x00,0x00,0x00,0x00),
??????????????????? 'F' => array(0x00,0x00,0xFE,0x66,0x62,0x68,0x78,0x68,0x60,0x60,0x60,0xF0,0x00,0x00,0x00,0x00),
??????????????????? 'G' => array(0x00,0x00,0x3C,0x66,0xC2,0xC0,0xC0,0xDE,0xC6,0xC6,0x66,0x3A,0x00,0x00,0x00,0x00),
??????????????????? 'H' => array(0x00,0x00,0xC6,0xC6,0xC6,0xC6,0xFE,0xC6,0xC6,0xC6,0xC6,0xC6,0x00,0x00,0x00,0x00),
??????????????????? 'I' => array(0x00,0x00,0x3C,0x18,0x18,0x18,0x18,0x18,0x18,0x18,0x18,0x3C,0x00,0x00,0x00,0x00),
??????????????????? 'J' => array(0x00,0x00,0x1E,0x0C,0x0C,0x0C,0x0C,0x0C,0xCC,0xCC,0xCC,0x78,0x00,0x00,0x00,0x00),
??????????????????? 'K' => array(0x00,0x00,0xE6,0x66,0x66,0x6C,0x78,0x78,0x6C,0x66,0x66,0xE6,0x00,0x00,0x00,0x00),
??????????????????? 'L' => array(0x00,0x00,0xF0,0x60,0x60,0x60,0x60,0x60,0x60,0x62,0x66,0xFE,0x00,0x00,0x00,0x00),
??????????????????? 'M' => array(0x00,0x00,0xC6,0xEE,0xFE,0xFE,0xD6,0xC6,0xC6,0xC6,0xC6,0xC6,0x00,0x00,0x00,0x00),
??????????????????? 'N' => array(0x00,0x00,0xC6,0xE6,0xF6,0xFE,0xDE,0xCE,0xC6,0xC6,0xC6,0xC6,0x00,0x00,0x00,0x00),
??????????????????? 'O' => array(0x00,0x00,0x7C,0xC6,0xC6,0xC6,0xC6,0xC6,0xC6,0xC6,0xC6,0x7C,0x00,0x00,0x00,0x00),
??????????????????? 'P' => array(0x00,0x00,0xFC,0x66,0x66,0x66,0x7C,0x60,0x60,0x60,0x60,0xF0,0x00,0x00,0x00,0x00),
??????????????????? 'Q' => array(0x00,0x00,0x7C,0xC6,0xC6,0xC6,0xC6,0xC6,0xC6,0xD6,0xDE,0x7C,0x0C,0x0E,0x00,0x00),
??????????????????? 'R' => array(0x00,0x00,0xFC,0x66,0x66,0x66,0x7C,0x6C,0x66,0x66,0x66,0xE6,0x00,0x00,0x00,0x00),
??????????????????? 'S' => array(0x00,0x00,0x7C,0xC6,0xC6,0x60,0x38,0x0C,0x06,0xC6,0xC6,0x7C,0x00,0x00,0x00,0x00),
??????????????????? 'T' => array(0x00,0x00,0x7E,0x7E,0x5A,0x18,0x18,0x18,0x18,0x18,0x18,0x3C,0x00,0x00,0x00,0x00),
??????????????????? 'U' => array(0x00,0x00,0xC6,0xC6,0xC6,0xC6,0xC6,0xC6,0xC6,0xC6,0xC6,0x7C,0x00,0x00,0x00,0x00),
??????????????????? 'V' => array(0x00,0x00,0xC6,0xC6,0xC6,0xC6,0xC6,0xC6,0xC6,0x6C,0x38,0x10,0x00,0x00,0x00,0x00),
??????????????????? 'W' => array(0x00,0x00,0xC6,0xC6,0xC6,0xC6,0xD6,0xD6,0xD6,0xFE,0xEE,0x6C,0x00,0x00,0x00,0x00),
??????????????????? 'X' => array(0x00,0x00,0xC6,0xC6,0x6C,0x7C,0x38,0x38,0x7C,0x6C,0xC6,0xC6,0x00,0x00,0x00,0x00),
??????????????????? 'Y' => array(0x00,0x00,0x66,0x66,0x66,0x66,0x3C,0x18,0x18,0x18,0x18,0x3C,0x00,0x00,0x00,0x00),
??????????????????? 'Z' => array(0x00,0x00,0xFE,0xC6,0x86,0x0C,0x18,0x30,0x60,0xC2,0xC6,0xFE,0x00,0x00,0x00,0x00),
??????????????????? 'a' => array(0x00,0x00,0x00,0x00,0x00,0x78,0x0C,0x7C,0xCC,0xCC,0xCC,0x76,0x00,0x00,0x00,0x00),
??????????????????? 'b' => array(0x00,0x00,0xE0,0x60,0x60,0x78,0x6C,0x66,0x66,0x66,0x66,0x7C,0x00,0x00,0x00,0x00),
??????????????????? 'c' => array(0x00,0x00,0x00,0x00,0x00,0x7C,0xC6,0xC0,0xC0,0xC0,0xC6,0x7C,0x00,0x00,0x00,0x00),
??????????????????? 'd' => array(0x00,0x00,0x1C,0x0C,0x0C,0x3C,0x6C,0xCC,0xCC,0xCC,0xCC,0x76,0x00,0x00,0x00,0x00),
??????????????????? 'e' => array(0x00,0x00,0x00,0x00,0x00,0x7C,0xC6,0xFE,0xC0,0xC0,0xC6,0x7C,0x00,0x00,0x00,0x00),
??????????????????? 'f' => array(0x00,0x00,0x38,0x6C,0x64,0x60,0xF0,0x60,0x60,0x60,0x60,0xF0,0x00,0x00,0x00,0x00),
??????????????????? 'g' => array(0x00,0x00,0x00,0x00,0x00,0x76,0xCC,0xCC,0xCC,0xCC,0xCC,0x7C,0x0C,0xCC,0x78,0x00),
??????????????????? 'h' => array(0x00,0x00,0xE0,0x60,0x60,0x6C,0x76,0x66,0x66,0x66,0x66,0xE6,0x00,0x00,0x00,0x00),
??????????????????? 'i' => array(0x00,0x00,0x18,0x18,0x00,0x38,0x18,0x18,0x18,0x18,0x18,0x3C,0x00,0x00,0x00,0x00),
??????????????????? 'j' => array(0x00,0x00,0x06,0x06,0x00,0x0E,0x06,0x06,0x06,0x06,0x06,0x06,0x66,0x66,0x3C,0x00),
??????????????????? 'k' => array(0x00,0x00,0xE0,0x60,0x60,0x66,0x6C,0x78,0x78,0x6C,0x66,0xE6,0x00,0x00,0x00,0x00),
??????????????????? 'l' => array(0x00,0x00,0x38,0x18,0x18,0x18,0x18,0x18,0x18,0x18,0x18,0x3C,0x00,0x00,0x00,0x00),
??????????????????? 'm' => array(0x00,0x00,0x00,0x00,0x00,0xEC,0xFE,0xD6,0xD6,0xD6,0xD6,0xC6,0x00,0x00,0x00,0x00),
??????????????????? 'n' => array(0x00,0x00,0x00,0x00,0x00,0xDC,0x66,0x66,0x66,0x66,0x66,0x66,0x00,0x00,0x00,0x00),
??????????????????? 'o' => array(0x00,0x00,0x00,0x00,0x00,0x7C,0xC6,0xC6,0xC6,0xC6,0xC6,0x7C,0x00,0x00,0x00,0x00),
??????????????????? 'p' => array(0x00,0x00,0x00,0x00,0x00,0xDC,0x66,0x66,0x66,0x66,0x66,0x7C,0x60,0x60,0xF0,0x00),
??????????????????? 'q' => array(0x00,0x00,0x00,0x00,0x00,0x76,0xCC,0xCC,0xCC,0xCC,0xCC,0x7C,0x0C,0x0C,0x1E,0x00),
??????????????????? 'r' => array(0x00,0x00,0x00,0x00,0x00,0xDC,0x76,0x66,0x60,0x60,0x60,0xF0,0x00,0x00,0x00,0x00),
??????????????????? 's' => array(0x00,0x00,0x00,0x00,0x00,0x7C,0xC6,0x60,0x38,0x0C,0xC6,0x7C,0x00,0x00,0x00,0x00),
??????????????????? 't' => array(0x00,0x00,0x10,0x30,0x30,0xFC,0x30,0x30,0x30,0x30,0x36,0x1C,0x00,0x00,0x00,0x00),
??????????????????? 'u' => array(0x00,0x00,0x00,0x00,0x00,0xCC,0xCC,0xCC,0xCC,0xCC,0xCC,0x76,0x00,0x00,0x00,0x00),
??????????????????? 'v' => array(0x00,0x00,0x00,0x00,0x00,0x66,0x66,0x66,0x66,0x66,0x3C,0x18,0x00,0x00,0x00,0x00),
??????????????????? 'w' => array(0x00,0x00,0x00,0x00,0x00,0xC6,0xC6,0xD6,0xD6,0xD6,0xFE,0x6C,0x00,0x00,0x00,0x00),
??????????????????? 'x' => array(0x00,0x00,0x00,0x00,0x00,0xC6,0x6C,0x38,0x38,0x38,0x6C,0xC6,0x00,0x00,0x00,0x00),
??????????????????? 'y' => array(0x00,0x00,0x00,0x00,0x00,0xC6,0xC6,0xC6,0xC6,0xC6,0xC6,0x7E,0x06,0x0C,0xF8,0x00),
??????????????????? 'z' => array(0x00,0x00,0x00,0x00,0x00,0xFE,0xCC,0x18,0x30,0x60,0xC6,0xFE,0x00,0x00,0x00,0x00)
??????????????? );
???????
??????? return($ascii);
??? }
???
??? /*創(chuàng)建CRC校驗(yàn)表*/
??? private function crcTable( )
??? {
??????? $z = -306674912;? // = 0xedb88320
???????
??????? for ($n = 0; $n ??????? {
??????????? $c = $n;
???????????
??????????? for($k = 0; $k ??????????? {
??????????????? $c = ($c & 1) ? $z ^ (($c >> 1) & 0x7fffffff) : ($c >> 1) & 0x7fffffff;
??????????? }
???????????
??????????? $crcTable[$n] = $c;
??????? }
???????
??????? return(self::save('crcTable', $crcTable));
??? }
???
??? /*png圖片文件頭*/
??? private function headTag( )
??? {
??????? return(pack("c*", 137, 80, 78, 71, 13, 10, 26, 10));
??? }
???
??? /*IHDR數(shù)據(jù)塊信息(寬度, 高度)*/
??? private function ihdr($width, $height)
??? {
??????? $body = pack("c*", ($width >> 24) & 255, ($width >> 16) & 255, ($width >> 8) & 255, $width & 255, ($height >> 24) & 255, ($height >> 16) & 255, ($height >> 8) & 255, $height & 255, self::depth( ), self::type( ), 0, 0, 0);
??????? return(self::chunk($body, "IHDR"));
??? }
???
??? /*圖像深度*/
??? private function depth( )
??? {
??????? return(8);
??? }
???
??? /*圖像類型*/
??? private function type( )
??? {
??????? return(2);
??? }
???
??? /*數(shù)據(jù)塊(數(shù)據(jù), 類型)*/
??? private function chunk($data, $type)
??? {
??????? $len = strlen($data);
??????? $chunk = pack("c*", ($len >> 24) & 255, ($len >> 16) & 255, ($len >> 8) & 255, $len & 255) . $type . $data;
??????? $c = $z = 16777215 | 255 ??????? $chunkLength = strlen($chunk);
??????? $crcTable = self::read('crcTable');
???????
??????? for ($i = 4; $i ??????? {
???????????? $z8 = ($z >> 8) & 0xffffff;
???????????? $z = $crcTable[($z ^ ord($chunk[$i])) & 0xff] ^ $z8;
??????? }
???????
??????? $crc = $c ^ $z;
??????? $chunk .= chr(($crc >> 24) & 255) . chr(($crc >> 16) & 255) . chr(($crc >> 8) & 255) . chr($crc & 255);
??????? return($chunk);
??? }
???
??? /*IDAT數(shù)據(jù)塊(寬度, 高度)*/
??? private function idat($width, $height)
??? {
??????? $data = self::read('img');
??????? $body = '';
??????? $k = 0;
???????
??????? for($h = 0; $h ??????? {
??????????? $body .= chr(0);
???????????
??????????? for($w = 0; $w ??????????? {
???????????????? $body .= $data[$k++];
??????????? }
??????? }
???????
??????? return(self::chunk(self::idatHead($width, $height) . $body . self::adler($body), "IDAT"));
??? }
???
??? /*IDAT頭信息(寬度, 高度)*/
??? private function idatHead($width, $height)
??? {
??????? $len = ($width * 3 + 1) * $height;
??????? return(pack("c*", 0x78, 0x01, 1, $len & 255, ($len >> 8) & 255, 255 - ($len & 255), 255 - (($len >> 8) & 255)));
??? }
??? /*計(jì)算adler32碼(內(nèi)容數(shù)據(jù))*/
??? private function adler($data)
??? {
??????? $dataLen = strlen($data);
??????? $s1 = 1;
??????? $s2 = 0;
???????
??????? for($i = 0; $i ??????? {
??????????? $s1 = ($s1 + ord($data[$i])) % 65521;
??????????? $s2 = ($s2 + $s1) % 65521;
??????? }
???????
??????? $adler = ($s2 ??????? return(chr(($adler >> 24) & 255) . chr(($adler >> 16) & 255) . chr(($adler >> 8) & 255) . chr($adler & 255));
??? }
???
??? /*iend*/
??? private function iend( )
??? {
??????? return(self::chunk('', "IEND"));
??? }
???
??? /*保存(字段名, 值)*/
??? private function save($field, $value)
??? {
??????? $this->info[$field] = $value;
??????? return(true);
??? }
???
??? /*讀取(字段名)*/
??? private function read($field)
??? {
??????? return($this->info[$field]);
??? }
???
??? public function __destruct( )
??? {
??? }
}
?>
?