php实现的通用图片处理类

来源：阅读：592 次日期：2015-03-27 11:07:35

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这篇文章主要介绍了php实现的通用图片处理类,可实现针对图片的缩放、剪切、相框、水印、锐化、旋转、翻转、透明度、反色等功能,具有一定参考借鉴价值,需要的朋友可以参考下

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

class picture

{

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);

}

function get_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])

{

case 1:

$this->PICTURE_CREATE=imagecreatefromgif($PICTURE_URL);

$this->PICTURE_TYPE="imagejpeg";

$this->PICTURE_EXT="jpg";

break;

case 2:

$this->PICTURE_CREATE=imagecreatefromjpeg($PICTURE_URL);

$this->PICTURE_TYPE="imagegif";

$this->PICTURE_EXT="gif";

break;

case 3:

$this->PICTURE_CREATE=imagecreatefrompng($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]);

}

//end of __construct

将16进制的颜色转换成10进制的（R，G，B）

function hex2dec()

{

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

function zoom_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

function zoom()

{

//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);

}

//end of zoom

//裁切图片,按坐标或自动

function cut()

{

$this->TRUE_COLOR=imagecreatetruecolor($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);

}

//end of cut

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])

{

case 1:

$FORCE_PICTURE_CREATE=imagecreatefromgif($this->FORCE_URL);

$FORCE_PICTURE_TYPE="gif";

break;

case 2:

$FORCE_PICTURE_CREATE=imagecreatefromjpeg($this->FORCE_URL);

$FORCE_PICTURE_TYPE="jpg";

break;

case 3:

$FORCE_PICTURE_CREATE=imagecreatefrompng($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;

}

//end of mark

function alpha_()

{

$this->TRUE_COLOR=imagecreatetruecolor($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

function turn_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

function turn_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

function turn()

{

$this->TRUE_COLOR=imagecreatetruecolor($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

function sharp()

{

$this->TRUE_COLOR=imagecreatetruecolor($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("color allocate faile at $x, $y ($cnt).");

imagesetpixel($this->TRUE_COLOR, $x, $y, $DST_CLR);

}

将图片反色处理??

function return_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

function show()

{

// 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

function save_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);

}

//end of class

}

希望本文所述对大家的php程序设计有所帮助。

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