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<?php
/**
* 水印类
*
* 可以生成文字水印和图片水印(图片文件类型:gif,jpg,png)
*
*
*
* @package library* www.shopnc.club 专业团队 提供售后服务
*/
class ModelCatalogWater extends Model {
/**
* 输入图片的文件名(必须包含路径名)
*/
private $src_image_name = "";
/**
* jpeg图片质量
*/
private $jpeg_quality = 90;
/**
* 输出文件名
*/
private $save_file = ‘‘;
/**
* 水印图片的文件名(必须包含路径名)
*/
private $wm_image_name = "";
/**
* 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
*/
private $wm_image_pos = 1;
/**
* 水印图片与原图片的融合度 (1=100)
*/
private $wm_image_transition = 20;
/**
* 水印文字(支持中英文以及带有\r\n的跨行文字)
*/
private $wm_text = "";
/**
* 水印文字大小(单位:像素px)
*/
private $wm_text_size = 20;
/**
* 水印文字角度,这个值尽量不要更改
*/
private $wm_text_angle = 4;
/**
* 水印文字放置位置
*/
private $wm_text_pos = 3;
/**
* 水印文字的字体
*/
private $wm_text_font = "";
/**
* 水印字体的颜色值
*/
private $wm_text_color = "#cccccc";
/**
* 取指定下标的数组内容
*
* @param string $key 数组下标
* @return string 字符串形式的返回结果
*/
public function get($key){
$result = $this->$key ? $this->$key : ‘‘;
return $result;
}
/**
* 设置指定下标的数组内容
*
* @param string $key 数组下标
* @param string $value 值
* @return bool 字符串形式的返回结果
*/
public function set($key,$value){
$this->$key = $value;
return true;
}
/**
* 设置水印内容
*
*/
public function setWatermark($watermark){
$this->set(‘jpeg_quality‘,$watermark[‘jpeg_quality‘]);
if($watermark[‘wm_image_name‘] != ‘‘){
$this->set(‘wm_image_name‘,‘image/‘.$watermark[‘wm_image_name‘]);
}
$this->set(‘wm_image_pos‘,$watermark[‘wm_image_pos‘]);
$this->set(‘wm_image_transition‘,$watermark[‘wm_image_transition‘]);
$this->set(‘wm_text‘,$watermark[‘wm_text‘]);
$this->set(‘wm_text_size‘,$watermark[‘wm_text_size‘]);
$this->set(‘wm_text_angle‘,$watermark[‘wm_text_angle‘]);
$this->set(‘wm_text_pos‘,$watermark[‘wm_text_pos‘]);
$this->set(‘wm_text_font‘,‘arial.ttf‘);
$this->set(‘jpeg_quality‘,$watermark[‘jpeg_quality‘]);
$this->set(‘wm_text_color‘, $watermark[‘wm_text_color‘]);
return true;
}
/**
* 生成增加水印的图片
*
* <code>
* //使用示例
* <?php
* $img = new GDImage();
* //文字水印
* $img->wm_text = "www.shopnc.club";
* $img->wm_text_font = "./STXINWEI.TTF";
* //图片水印
* $img->wm_image_name="水印图片名";
* $img->create("生成图片文件名(包括路径)");
* ?>
* </code>
*
* @param string $filename 需要增加水印的图片文件名
* @return bool 布尔类型的返回结果
*/
public function create($filename="")
{
@ini_set(‘memory_limit‘, ‘-1‘);
if ($filename){
$this->src_image_name = trim($filename);
$this->save_file = $this->src_image_name;
}
$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 false;
}
$src_image_w=ImageSX($src_image);
$src_image_h=ImageSY($src_image);
if ($this->wm_image_name){
$this->wm_image_name = trim($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);
/*print_r($src_image_w);
print_r($src_image_h);
print_r($this->wm_image_pos);
print_r($wm_image);
exit;*/
$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 = $temp_wm_image["dest_y"];
/*print_r($wm_image_x);
print_r($wm_image_y);exit;*/
// imageCopyMerge($src_image, $wm_image,$wm_image_x,$wm_image_y,0,0,$wm_image_w,$wm_image_h,$this->wm_image_transition);
imagecopy($src_image, $wm_image,$wm_image_x,$wm_image_y,0,0,$wm_image_w,$wm_image_h);
/*imagesetbrush($src_image, $wm_image);
imageline($src_image, $wm_image_x, $wm_image_y, $wm_image_x, $wm_image_y, IMG_COLOR_BRUSHED);*/
}
if ($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 ($this->get_type($this->save_file)){
case ‘gif‘:$src_img=imagegif($src_image, $this->save_file); break;
case ‘jpeg‘:$src_img=ImageJPEG($src_image, $this->save_file, $this->jpeg_quality); break;
case ‘jpg‘:$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=imagegif($src_image); break;
case ‘jpg‘:$src_img=ImageJPEG($src_image, "", $this->jpeg_quality);break;
case ‘jpeg‘:$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);
return true;
}
/**
* 根据文件名和类型创建图片
*
* @param string $type 图片的类型，包括gif,jpg,png
* @param string $img_name 图片文件名，包括路径名，例如 " ./mouse.jpg"
* @return string 字符串类型的返回结果
*/
private function createImage($type, $img_name){
if (!$type){
$type = $this->get_type($img_name);
}
switch ($type){
case ‘gif‘:
if (function_exists(‘imagecreatefromgif‘))
$tmp_img=@ImageCreateFromGIF($img_name);
break;
case ‘jpg‘:
$tmp_img=ImageCreateFromJPEG($img_name);
break;
case ‘jpeg‘:
$tmp_img=ImageCreateFromJPEG($img_name);
break;
case ‘png‘:
$tmp_img=ImageCreateFromPNG($img_name);
break;
default:
$tmp_img=ImageCreateFromString($img_name);
break;
}
return $tmp_img;
}
/**
* 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
*
* @param int $sourcefile_width 源图像的宽
* @param int $sourcefile_height 源图像的高
* @param int $pos 位置代码
* @param string $wm_image 水印图片 如果为空 则默认为文字水印
* @return array 数组形式的返回结果
*/
private function getPos($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] - $fontSize[3]);
}
/*print_r($insertfile_width);
print_r($insertfile_height);exit;*/
switch ($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 - $insertfile_width;
if ($this->wm_text){
$dest_y = $insertfile_height;
}else{
$dest_y = 0;
}
break;
case 4:
$dest_x = 0;
$dest_y = ( $sourcefile_height / 2 ) - ( $insertfile_height / 2 );
break;
case 5:
$dest_x = ( ( $sourcefile_width - $insertfile_width ) / 2 );
$dest_y = ( $sourcefile_height / 2 ) - ( $insertfile_height / 2 );
/*print_r($dest_x);
print_r($dest_y);exit;*/
break;
case 6:
$dest_x = $sourcefile_width - $insertfile_width;
$dest_y = ( $sourcefile_height / 2 ) - ( $insertfile_height / 2 );
break;
case 7:
$dest_x = 0;
$dest_y = $sourcefile_height - $insertfile_height;
break;
case 8:
$dest_x = ( ( $sourcefile_width - $insertfile_width ) / 2 );
$dest_y = $sourcefile_height - $insertfile_height;
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);
}
/**
* 指定的文字转换为UTF-8格式，包括中英文混合
*
* @param string $gb gbk字符串
* @return string 字符串形式的返回结果
*/
private function gb2utf8($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;
}
/**
* 获得图片的格式，包括jpg,png,gif
*
* @param string $img_name 图片文件名，包括路径名
* @return string 字符串形式的返回结果
*/
private function get_type($img_name)
{
$name_array = explode(".",$img_name);
if (preg_match("/\.(jpg|jpeg|gif|png)$/", $img_name, $matches))
{
$type = strtolower($matches[1]);
}
else
{
$type = "string";
}
return $type;
}
}
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原文地址：http://www.cnblogs.com/freelyflying/p/5733969.html
