php实现的通用图片处理类
本文实例讲述了php实现的通用图片处理类。分享给大家供大家参考。具体如下：
该图片处理函数功能：缩放、剪切、相框、水印、锐化、旋转、翻转、透明度、反色，处理并保存历史记录的思路：当有图片有改动时自动生成一张新图片，命名方式可以考虑在原图片的基础上加上步骤，例如：图片名称+__第几步。在一些需要图片高级处理功能的Web应用中，可以参考这个类。
<?php
classpicture
{
var$PICTURE_URL;//要处理的图片
var$DEST_URL="temp__01.jpg";//生成目标图片位置
var$PICTURE_CREATE;//要创建的图片
var$TURE_COLOR;//新建一个真彩图象
var$PICTURE_WIDTH;//原图片宽度
var$PICTURE_HEIGHT;//原图片高度
/*
水印的类型，默认的为水印文字
*/
var$MARK_TYPE=1;
var$WORD;//经过UTF-8后的文字
var$WORD_X;//文字横坐标
var$WORD_Y;//文字纵坐标
var$FONT_TYPE;//字体类型
var$FONT_SIZE="12";//字体大小
var$FONT_WORD;//文字
var$ANGLE=0;//文字的角度，默认为0
var$FONT_COLOR="#000000";//文字颜色
var$FONT_PATH="font/simkai.ttf";//字体库，默认为宋体
var$FORCE_URL;//水印图片
var$FORCE_X=0;//水印横坐标
var$FORCE_Y=0;//水印纵坐标
var$FORCE_START_X=0;//切起水印的图片横坐标
var$FORCE_START_Y=0;//切起水印的图片纵坐标
var$PICTURE_TYPE;//图片类型
var$PICTURE_MIME;//输出的头部
/*
缩放比例为1的话就按缩放高度和宽度缩放
*/
var$ZOOM=1;//缩放类型
var$ZOOM_MULTIPLE;//缩放比例
var$ZOOM_WIDTH;//缩放宽度
var$ZOOM_HEIGHT;//缩放高度
/*
裁切，按比例和固定长度、宽度
*/
var$CUT_TYPE=1;//裁切类型
var$CUT_X=0;//裁切的横坐标
var$CUT_Y=0;//裁切的纵坐标
var$CUT_;//裁切的宽度
var$CUT_HEIGHT=100;//裁切的高度
/*
锐化
*/
var$SHARP="7.0";//锐化程度
/*
透明度处理
*/
var$ALPHA='100';//透明度在0-127之间
var$ALPHA_X="90";
var$ALPHA_Y="50";
/*
任意角度旋转
*/
var$CIRCUMROTATE="90.0";//注意，必须为浮点数
/*
出错信息
*/
var$ERROR=array(
'unalviable'=>'没有找到相关图片!'
);
/*
构造函数：函数初始化
*/
function__construct($PICTURE_URL)
{
$this->get_info($PICTURE_URL);
}
functionget_info($PICTURE_URL)
{
/*
处理原图片的信息,先检测图片是否存在,不存在则给出相应的信息
*/
@$SIZE=getimagesize($PICTURE_URL);
if(!$SIZE)
{
exit($this->ERROR['unalviable']);
}
//得到原图片的信息类型、宽度、高度
$this->PICTURE_MIME=$SIZE['mime'];
$this->PICTURE_;
$this->PICTURE_HEIGHT=$SIZE[1];
//创建图片
switch($SIZE[2])
{
case1:
$this->PICTURE_CREATE=imagecreatefromgif($PICTURE_URL);
$this->PICTURE_TYPE="imagejpeg";
$this->PICTURE_EXT="jpg";
break;
case2:
$this->PICTURE_CREATE=imagecreatefromjpeg($PICTURE_URL);
$this->PICTURE_TYPE="imagegif";
$this->PICTURE_EXT="gif";
break;
case3:
$this->PICTURE_CREATE=imagecreatefrompng($PICTURE_URL);
$this->PICTURE_TYPE="imagepng";
$this->PICTURE_EXT="png";
break;
}
/*
文字颜色转换16进制转换成10进制
*/
preg_match_all("/([0-f]){2,2}/i",$this->FONT_COLOR,$MATCHES);
if(count($MATCHES)==3)
{
$this->RED=hexdec($MATCHES[0][0]);
$this->GREEN=hexdec($MATCHES[0][1]);
$this->BLUE=hexdec($MATCHES[0][2]);
}
}
//endof__construct
/*
将16进制的颜色转换成10进制的（R，G，B）
*/
functionhex2dec()
{
preg_match_all("/([0-f]){2,2}/i",$this->FONT_COLOR,$MATCHES);
if(count($MATCHES)==3)
{
$this->RED=hexdec($MATCHES[0][0]);
$this->GREEN=hexdec($MATCHES[0][1]);
$this->BLUE=hexdec($MATCHES[0][2]);
}
}
//缩放类型
functionzoom_type($ZOOM_TYPE)
{
$this->ZOOM=$ZOOM_TYPE;
}
//对图片进行缩放,如果不指定高度和宽度就进行缩放
functionzoom()
{
//缩放的大小
if($this->ZOOM==0)
{
$this->ZOOM_;gt;PICTURE_WIDTH*$this->ZOOM_MULTIPLE;
$this->ZOOM_HEIGHT=$this->PICTURE_HEIGHT*$this->ZOOM_MULTIPLE;
}
//新建一个真彩图象
$this->TRUE_COLOR=imagecreatetruecolor($this->ZOOM_WIDTH,$this->ZOOM_HEIGHT);
$WHITE=imagecolorallocate($this->TRUE_COLOR,255,255,255);
imagefilledrectangle($this->TRUE_COLOR,0,0,$this->ZOOM_WIDTH,$this->ZOOM_HEIGHT,$WHITE);
imagecopyresized($this->TRUE_COLOR,$this->PICTURE_CREATE,0,0,0,0,$this->ZOOM_WIDTH,$this->ZOOM_HEIGHT,$this->PICTURE_WIDTH,$this->PICTURE_HEIGHT);
}
//endofzoom
//裁切图片,按坐标或自动
functioncut()
{
$this->TRUE_COLOR=imagecreatetruecolor($this->CUT_WIDTH,$this->CUT_WIDTH);
imagecopy($this->TRUE_COLOR,$this->PICTURE_CREATE,0,0,$this->CUT_X,$this->CUT_Y,$this->CUT_WIDTH,$this->CUT_HEIGHT);
}
//endofcut
/*
在图片上放文字或图片
水印文字
*/
function_mark_text()
{
$this->TRUE_COLOR=imagecreatetruecolor($this->PICTURE_WIDTH,$this->PICTURE_HEIGHT);
$this->WORD=mb_convert_encoding($this->FONT_WORD,'utf-8','gb2312');
/*
取得使用TrueType字体的文本的范围
*/
$TEMP=imagettfbbox($this->FONT_SIZE,0,$this->FONT_PATH,$this->WORD);
$WORD_LENGTH=strlen($this->WORD);
$WORD_WIDTH=$TEMP[2]-$TEMP[6];
$WORD_HEIGHT=$TEMP[3]-$TEMP[7];
/*
文字水印的默认位置为右下角
*/
if($this->WORD_X=="")
{
$this->WORD_X=$this->PICTURE_WIDTH-$WORD_WIDTH;
}
if($this->WORD_Y=="")
{
$this->WORD_Y=$this->PICTURE_HEIGHT-$WORD_HEIGHT;
}
imagesettile($this->TRUE_COLOR,$this->PICTURE_CREATE);
imagefilledrectangle($this->TRUE_COLOR,0,0,$this->PICTURE_WIDTH,$this->PICTURE_HEIGHT,IMG_COLOR_TILED);
$TEXT2=imagecolorallocate($this->TRUE_COLOR,$this->RED,$this->GREEN,$this->Blue);
imagettftext($this->TRUE_COLOR,$this->FONT_SIZE,$this->ANGLE,$this->WORD_X,$this->WORD_Y,$TEXT2,$this->FONT_PATH,$this->WORD);
}
/*
水印图片
*/
function_mark_picture()
{
/*
获取水印图片的信息
*/
@$SIZE=getimagesize($this->FORCE_URL);
if(!$SIZE)
{
exit($this->ERROR['unalviable']);
}
$FORCE_PICTURE_;
$FORCE_PICTURE_HEIGHT=$SIZE[1];
//创建水印图片
switch($SIZE[2])
{
case1:
$FORCE_PICTURE_CREATE=imagecreatefromgif($this->FORCE_URL);
$FORCE_PICTURE_TYPE="gif";
break;
case2:
$FORCE_PICTURE_CREATE=imagecreatefromjpeg($this->FORCE_URL);
$FORCE_PICTURE_TYPE="jpg";
break;
case3:
$FORCE_PICTURE_CREATE=imagecreatefrompng($this->FORCE_URL);
$FORCE_PICTURE_TYPE="png";
break;
}
/*
判断水印图片的大小，并生成目标图片的大小，如果水印比图片大，则生成图片大小为水印图片的大小。否则生成的图片大小为原图片大小。
*/
$this->NEW_PICTURE=$this->PICTURE_CREATE;
if($FORCE_PICTURE_WIDTH>$this->PICTURE_WIDTH)
{
$CREATE_;gt;FORCE_START_X;
}
else
{
$CREATE_;gt;PICTURE_WIDTH;
}
if($FORCE_PICTURE_HEIGHT>$this->PICTURE_HEIGHT)
{
$CREATE_HEIGHT=$FORCE_PICTURE_HEIGHT-$this->FORCE_START_Y;
}
else
{
$CREATE_HEIGHT=$this->PICTURE_HEIGHT;
}
/*
创建一个画布
*/
$NEW_PICTURE_CREATE=imagecreatetruecolor($CREATE_WIDTH,$CREATE_HEIGHT);
$WHITE=imagecolorallocate($NEW_PICTURE_CREATE,255,255,255);
/*
将背景图拷贝到画布中
*/
imagecopy($NEW_PICTURE_CREATE,$this->PICTURE_CREATE,0,0,0,0,$this->PICTURE_WIDTH,$this->PICTURE_HEIGHT);
/*
将目标图片拷贝到背景图片上
*/
imagecopy($NEW_PICTURE_CREATE,$FORCE_PICTURE_CREATE,$this->FORCE_X,$this->FORCE_Y,$this->FORCE_START_X,$this->FORCE_START_Y,$FORCE_PICTURE_WIDTH,$FORCE_PICTURE_HEIGHT);
$this->TRUE_COLOR=$NEW_PICTURE_CREATE;
}
//endofmark
functionalpha_()
{
$this->TRUE_COLOR=imagecreatetruecolor($this->PICTURE_WIDTH,$this->PICTURE_HEIGHT);
$rgb="#CDCDCD";
$tran_color="#000000";
for($j=0;$j<=$this->PICTURE_HEIGHT-1;$j++)
{
for($i=0;$i<=$this->PICTURE_WIDTH-1;$i++)
{
$rgb=imagecolorat($this->PICTURE_CREATE,$i,$j);
$r=($rgb>>16)&0xFF;
$g=($rgb>>8)&0xFF;
$b=$rgb&0xFF;
$now_color=imagecolorallocate($this->PICTURE_CREATE,$r,$g,$b);
if($now_color==$tran_color)
{
continue;
}
else
{
$color=imagecolorallocatealpha($this->PICTURE_CREATE,$r,$g,$b,$ALPHA);
imagesetpixel($this->PICTURE_CREATE,$ALPHA_X+$i,$ALPHA_Y+$j,$color);
}
$this->TRUE_COLOR=$this->PICTURE_CREATE;
}
}
}
/*
图片旋转:
沿y轴旋转
*/
functionturn_y()
{
$this->TRUE_COLOR=imagecreatetruecolor($this->PICTURE_WIDTH,$this->PICTURE_HEIGHT);
for($x=0;$x<$this->PICTURE_WIDTH;$x++)
{
imagecopy($this->TRUE_COLOR,$this->PICTURE_CREATE,$this->PICTURE_WIDTH-$x-1,0,$x,0,1,$this->PICTURE_HEIGHT);
}
}
/*
沿X轴旋转
*/
functionturn_x()
{
$this->TRUE_COLOR=imagecreatetruecolor($this->PICTURE_WIDTH,$this->PICTURE_HEIGHT);
for($y=0;$y<$this->PICTURE_HEIGHT;$y++)
{
imagecopy($this->TRUE_COLOR,$this->PICTURE_CREATE,0,$this->PICTURE_HEIGHT-$y-1,0,$y,$this->PICTURE_WIDTH,1);
}
}
/*
任意角度旋转
*/
functionturn()
{
$this->TRUE_COLOR=imagecreatetruecolor($this->PICTURE_WIDTH,$this->PICTURE_HEIGHT);
imageCopyResized($this->TRUE_COLOR,$this->PICTURE_CREATE,0,0,0,0,$this->PICTURE_WIDTH,$this->PICTURE_HEIGHT,$this->PICTURE_WIDTH,$this->PICTURE_HEIGHT);
$WHITE=imagecolorallocate($this->TRUE_COLOR,255,255,255);
$this->TRUE_COLOR=imagerotate($this->TRUE_COLOR,$this->CIRCUMROTATE,$WHITE);
}
/*
图片锐化
*/
functionsharp()
{
$this->TRUE_COLOR=imagecreatetruecolor($this->PICTURE_WIDTH,$this->PICTURE_HEIGHT);
$cnt=0;
for($x=0;$x<$this->PICTURE_WIDTH;$x++)
{
for($y=0;$y<$this->PICTURE_HEIGHT;$y++)
{
$src_clr1=imagecolorsforindex($this->TRUE_COLOR,imagecolorat($this->PICTURE_CREATE,$x-1,$y-1));
$src_clr2=imagecolorsforindex($this->TRUE_COLOR,imagecolorat($this->PICTURE_CREATE,$x,$y));
$r=intval($src_clr2["red"]+$this->SHARP*($src_clr2["red"]-$src_clr1["red"]));
$g=intval($src_clr2["green"]+$this->SHARP*($src_clr2["green"]-$src_clr1["green"]));
$b=intval($src_clr2["blue"]+$this->SHARP*($src_clr2["blue"]-$src_clr1["blue"]));
$r=min(255,max($r,0));
$g=min(255,max($g,0));
$b=min(255,max($b,0));
if(($DST_CLR=imagecolorexact($this->PICTURE_CREATE,$r,$g,$b))==-1)
$DST_CLR=imagecolorallocate($this->PICTURE_CREATE,$r,$g,$b);
$cnt++;
if($DST_CLR==-1)die("colorallocatefaileat$x,$y($cnt).");
imagesetpixel($this->TRUE_COLOR,$x,$y,$DST_CLR);
}
}
}
/*
将图片反色处理??
*/
functionreturn_color()
{
/*
创建一个画布
*/
$NEW_PICTURE_CREATE=imagecreate($this->PICTURE_WIDTH,$this->PICTURE_HEIGHT);
$WHITE=imagecolorallocate($NEW_PICTURE_CREATE,255,255,255);
/*
将背景图拷贝到画布中
*/
imagecopy($NEW_PICTURE_CREATE,$this->PICTURE_CREATE,0,0,0,0,$this->PICTURE_WIDTH,$this->PICTURE_HEIGHT);
$this->TRUE_COLOR=$NEW_PICTURE_CREATE;
}
/*
生成目标图片并显示
*/
functionshow()
{
//判断浏览器,若是IE就不发送头
if(isset($_SERVER['HTTP_USER_AGENT']))
{
$ua=strtoupper($_SERVER['HTTP_USER_AGENT']);
if(!preg_match('/^.*MSIE.*\)$/i',$ua))
{
header("Content-type:$this->PICTURE_MIME");
}
}
$OUT=$this->PICTURE_TYPE;
$OUT($this->TRUE_COLOR);
}
/*
生成目标图片并保存
*/
functionsave_picture()
{
//以JPEG格式将图像输出到浏览器或文件
$OUT=$this->PICTURE_TYPE;
if(function_exists($OUT))
{
//判断浏览器,若是IE就不发送头
if(isset($_SERVER['HTTP_USER_AGENT']))
{
$ua=strtoupper($_SERVER['HTTP_USER_AGENT']);
if(!preg_match('/^.*MSIE.*\)$/i',$ua))
{
header("Content-type:$this->PICTURE_MIME");
}
}
if(!$this->TRUE_COLOR)
{
exit($this->ERROR['unavilable']);
}
else
{
$OUT($this->TRUE_COLOR,$this->DEST_URL);
$OUT($this->TRUE_COLOR);
}
}
}
/*
析构函数：释放图片
*/
function__destruct()
{
/*释放图片*/
imagedestroy($this->TRUE_COLOR);
imagedestroy($this->PICTURE_CREATE);
}
//endofclass
}
?>
希望本文所述对大家的php程序设计有所帮助。