PHP给图片增多水印得类

PHP给图片增加水印得类

<?php/*+--------------------------------------| 生成加水印的图片类 (支持水印为图片或者文字)| ============================| by JackMing （感谢Dash和其他不知道姓名的朋友支持，本类在这些朋友作品的基础上创建)+--------------------------------------*/Class Gimage{var $src_image_name = ""; //输入图片的文件名(必须包含路径名)var $jpeg_quality = 90; //jpeg图片质量var $save_image_file = ''; //输出文件名var $wm_image_name = ""; //水印图片的文件名(必须包含路径名)var $wm_image_pos = 1; //水印图片放置的位置// 0 = middle// 1 = top left// 2 = top right// 3 = bottom right// 4 = bottom left// 5 = top middle// 6 = middle right// 7 = bottom middle// 8 = middle left//other = 3var $wm_image_transition = 20; //水印图片与原图片的融合度 (1=100)var $wm_text = ""; //水印文字(支持中英文以及带有\r\n的跨行文字)var $wm_text_size = 20; //水印文字大小var $wm_text_angle = 4; //水印文字角度,这个值尽量不要更改var $wm_text_pos = 3; //水印文字放置位置var $wm_text_font = ""; //水印文字的字体var $wm_text_color = "#cccccc"; //水印字体的颜色值function create($filename=""){if ($filename) $this->src_image_name = strtolower(trim($filename));$src_image_type = $this->get_type($this->src_image_name);$src_image = $this->createImage($src_image_type,$this->src_image_name);if (!$src_image) return;$src_image_w=ImageSX($src_image);$src_image_h=ImageSY($src_image);if ($this->wm_image_name){$this->wm_image_name = strtolower(trim($this->wm_image_name));$wm_image_type = $this->get_type($this->wm_image_name);$wm_image = $this->createImage($wm_image_type,$this->wm_image_name);$wm_image_w=ImageSX($wm_image);$wm_image_h=ImageSY($wm_image);$temp_wm_image = $this->getPos($src_image_w,$src_image_h,$this->wm_image_pos,$wm_image);$wm_image_x = $temp_wm_image["dest_x"];$wm_image_y = $temp_wm_image["dest_y"];imageCopyMerge($src_image, $wm_image,$wm_image_x,$wm_image_y,0,0,$wm_image_w,$wm_image_h,$this->wm_image_transition);}if ($this->wm_text){$this->wm_text = $this->gb2utf8($this->wm_text);$temp_wm_text = $this->getPos($src_image_w,$src_image_h,$this->wm_text_pos);$wm_text_x = $temp_wm_text["dest_x"];$wm_text_y = $temp_wm_text["dest_y"];if(preg_match("/([a-f0-9][a-f0-9])([a-f0-9][a-f0-9])([a-f0-9][a-f0-9])/i", $this->wm_text_color, $color)){$red = hexdec($color[1]);$green = hexdec($color[2]);$blue = hexdec($color[3]);$wm_text_color = imagecolorallocate($src_image, $red,$green,$blue);}else{$wm_text_color = imagecolorallocate($src_image, 255,255,255);}imagettftext($src_image, $this->wm_text_size, $this->wm_angle, $wm_text_x, $wm_text_y, $wm_text_color,$this->wm_text_font,$this->wm_text);}if ($this->save_file){switch ($this->output_type){case 'gif':$src_img=ImagePNG($src_image, $this->save_file); break;case 'jpeg':$src_img=ImageJPEG($src_image, $this->save_file, $this->jpeg_quality); break;case 'png':$src_img=ImagePNG($src_image, $this->save_file); break;default:$src_img=ImageJPEG($src_image, $this->save_file, $this->jpeg_quality); break;}}else{if ($src_image_type = "jpg") $src_image_type="jpeg";header("Content-type: image/{$src_image_type}");switch ($src_image_type){case 'gif':$src_img=ImagePNG($src_image); break;case 'jpg':$src_img=ImageJPEG($src_image, "", $this->jpeg_quality);break;case 'png':$src_img=ImagePNG($src_image);break;default:$src_img=ImageJPEG($src_image, "", $this->jpeg_quality);break;}}imagedestroy($src_image);}/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++/*createImage 根据文件名和类型创建图片内部函数$type: 图片的类型，包括gif,jpg,png$img_name:图片文件名，包括路径名，例如 " ./mouse.jpg"*/function createImage($type,$img_name){if (!$type){$type = $this->get_type($img_name);}switch ($type){case 'gif':if (function_exists('imagecreatefromgif'))[email&#160;protected]($img_name);break;case 'jpg':$tmp_img=ImageCreateFromJPEG($img_name);break;case 'png':$tmp_img=ImageCreateFromPNG($img_name);break;default:$tmp_img=ImageCreateFromString($img_name);break;}return $tmp_img;}/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++getPos 根据源图像的长、宽，位置代码，水印图片id来生成把水印放置到源图像中的位置内部函数$sourcefile_width: 源图像的宽$sourcefile_height: 原图像的高$pos: 位置代码// 0 = middle// 1 = top left// 2 = top right// 3 = bottom right// 4 = bottom left// 5 = top middle// 6 = middle right// 7 = bottom middle// 8 = middle left$wm_image: 水印图片ID*/function getPos($sourcefile_width,$sourcefile_height,$pos,$wm_image=""){if($wm_image){$insertfile_width = ImageSx($wm_image);$insertfile_height = ImageSy($wm_image);}else {$lineCount = explode("\r\n",$this->wm_text);$fontSize = imagettfbbox($this->wm_text_size,$this->wm_text_angle,$this->wm_text_font,$this->wm_text);$insertfile_width = $fontSize[2] - $fontSize[0];$insertfile_height = count($lineCount)*($fontSize[1] - $fontSize[3]);}switch ($pos){case 0:$dest_x = ( $sourcefile_width / 2 ) - ( $insertfile_width / 2 );$dest_y = ( $sourcefile_height / 2 ) - ( $insertfile_height / 2 );break;case 1:$dest_x = 0;if ($this->wm_text){$dest_y = $insertfile_height;}else{$dest_y = 0;}break;case 2:$dest_x = $sourcefile_width - $insertfile_width;if ($this->wm_text){$dest_y = $insertfile_height;}else{$dest_y = 0;}break;case 3:$dest_x = $sourcefile_width - $insertfile_width;$dest_y = $sourcefile_height - $insertfile_height;break;case 4:$dest_x = 0;$dest_y = $sourcefile_height - $insertfile_height;break;case 5:$dest_x = ( ( $sourcefile_width - $insertfile_width ) / 2 );if ($this->wm_text){$dest_y = $insertfile_height;}else{$dest_y = 0;}break;case 6:$dest_x = $sourcefile_width - $insertfile_width;$dest_y = ( $sourcefile_height / 2 ) - ( $insertfile_height / 2 );break;case 7:$dest_x = ( ( $sourcefile_width - $insertfile_width ) / 2 );$dest_y = $sourcefile_height - $insertfile_height;break;case 8:$dest_x = 0;$dest_y = ( $sourcefile_height / 2 ) - ( $insertfile_height / 2 );break;default:$dest_x = $sourcefile_width - $insertfile_width;$dest_y = $sourcefile_height - $insertfile_height;break;}return array("dest_x"=>$dest_x,"dest_y"=>$dest_y);}/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++gb2utf8 指定的文字转换为UTF-8格式，包括中英文混合内部函数*/function gb2utf8($gb){if(!trim($gb))return $gb;$filename="./gb2312.txt";$tmp=file($filename);$codetable=array();while(list($key,$value)=each($tmp))$codetable[hexdec(substr($value,0,6))]=substr($value,7,6);$utf8="";while($gb){if (ord(substr($gb,0,1))>127){$tthis=substr($gb,0,2);$gb=substr($gb,2,strlen($gb)-2);$utf8.=$this->u2utf8(hexdec($codetable[hexdec(bin2hex($tthis))-0x8080]));}else{$tthis=substr($gb,0,1);$gb=substr($gb,1,strlen($gb)-1);$utf8.=$this->u2utf8($tthis);}}return $utf8;}function u2utf8($c){$str="";if ($c < 0x80){$str.=$c;}else if ($c < 0x800){$str.=chr(0xC0 | $c>>6);$str.=chr(0x80 | $c & 0x3F);}else if ($c < 0x10000){$str.=chr(0xE0 | $c>>12);$str.=chr(0x80 | $c>>6 & 0x3F);$str.=chr(0x80 | $c & 0x3F);}else if ($c < 0x200000){$str.=chr(0xF0 | $c>>18);$str.=chr(0x80 | $c>>12 & 0x3F);$str.=chr(0x80 | $c>>6 & 0x3F);$str.=chr(0x80 | $c & 0x3F);}return $str;}/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++get_type 获得图片的格式，包括jpg,png,gif内部函数$img_name： 图片文件名，可以包括路径名*/function get_type($img_name)//获取图像文件类型{$name_array = explode(".",$img_name);if (preg_match("/\.(jpg|jpeg|gif|png)$/", $img_name, $matches)){$type = strtolower($matches[1]);}else{$type = "string";}return $type;}}?>

使用方法:
$img = new Gimage();
$img->wm_text = "www.discuz.com";
$img->wm_text_font = "./STXINWEI.TTF";
$img->create("./mouse.jpg");

就可以了，其中
mouse.jpg是你要在其上添加水印的图片名称，注意包含路径名
STXINWEI.TTF是字体文件的路径名＋文件名
这就是一个简单的测试。如果要调整更复杂的显示效果，只要修改一下类中的属性就可以了，例如把字体放大就可以
$img->wm_text_size = 20;
增加水印图片就可以
$img->wm_image_name="文件名";