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标题: PHP中利用程序处理图片PHP中利用程序处理图片 [打印本页]

作者: tznktg 时间: 2007-9-27 20:02
标题: PHP中利用程序处理图片PHP中利用程序处理图片
分两个程序,一个是类文件,一个是操作文件.
两个程序加起来就是一个完整的PHP处理图片的程序!这个程序写的很规范,
我感觉这个程序还是有很多地方是可以优化的!
类文件: img.inc.php<?/***************************************
//*功能：利用PHP的GD库生成高质量的缩略图*
//*运行环境:PHP5.01/GD2*
//*类说明：可以选择是/否裁图。如果裁图则生成的图的尺寸与您输入的一样。原则：尽可能多保持原图完整如果不裁图，则按照原图比例生成新图原则：根据比例以输入的长或者宽为基准*
//*参数：$img:源图片地址$wid:新图的宽度$hei:新图的高度$c:是否裁图，1为是，0为否*
//* Author: antplus *
//* version: 1.1 *
//* QQ: 38188141 *
//* MSN: antplus@163.net *
//* Edit by meiking *
//***************************************
/class resizeimage{
//图片类型var $type;
//实际宽度var $width;
//实际高度var $height;
//改变后的宽度var $resize_width;
//改变后的高度var $resize_height;
//是否裁图var $cut;
//源图象var $srcimg;
//目标图象地址var $dstimg;
//临????建的图象var $im;function resizeimage($img, $wid, $hei,$c){$this->srcimg = $img;$this->resize_width = $wid;$this->resize_height = $hei;$this->cut = $c;
//图片的类型$this->type = substr(strrchr($this->srcimg,"."),1);
//初始化图象$this->initi_img();//目标图象地址$this -> dst_img();
//--$this->width = imagesx($this->im);$this->height = imagesy($this->im);
//生成图象$this->newimg();ImageDestroy ($this->im);}function newimg(){
// +----------------------------------------------------+// | 增加LOGO到缩略图中 Modify By Ice// +----------------------------------------------------+
//Add Logo$logoImage = ImageCreateFromGIF('logo.gif'); ImageAlphaBlending($this->im, true); $logoW = ImageSX($logoImage); $logoH = ImageSY($logoImage);
// +----------------------------------------------------+
//改变后的图象的比例$resize_ratio = ($this->resize_width)/($this->resize_height);
//实际图象的比例$ratio = ($this->width)/($this->height);if(($this->cut)=="1")
//裁图{if($ratio>=$resize_ratio)
//高度优先{$newimg = imagecreatetruecolor($this->resize_width,$this->resize_height);imagecopyresampled($newimg, $this->im, 0, 0, 0, 0, $this->resize_width,$this->resize_height, (($this->height)*$resize_ratio), $this->height);
// +----------------------------------------------------+
// | 增加LOGO到缩略图中 Modify By Ice
// +----------------------------------------------------+
ImageCopy($newimg, $logoImage, 0, 0, 0, 0, $logoW, $logoH);
// +----------------------------------------------------+
ImageJpeg ($newimg,$this->dstimg);}if($ratio<$resize_ratio)
//宽度优先{$newimg = imagecreatetruecolor($this->resize_width,$this->resize_height);imagecopyresampled($newimg, $this->im, 0, 0, 0, 0, $this->resize_width, $this->resize_height, $this->width, (($this->width)/$resize_ratio));
// +----------------------------------------------------+
// | 增加LOGO到缩略图中 Modify By Ice
// +----------------------------------------------------+
ImageCopy($newimg, $logoImage, 0, 0, 0, 0, $logoW, $logoH);
// +----------------------------------------------------+ImageJpeg ($newimg,$this->dstimg);}}else
//不裁图{if($ratio>=$resize_ratio){$newimg = imagecreatetruecolor($this->resize_width,($this->resize_width)/$ratio);imagecopyresampled($newimg, $this->im, 0, 0, 0, 0, $this->resize_width, ($this->resize_width)/$ratio, $this->width, $this->height);
// +----------------------------------------------------+//
| 增加LOGO到缩略图中 Modify By Ice//
+----------------------------------------------------+
ImageCopy($newimg, $logoImage, 0, 0, 0, 0, $logoW, $logoH);
// +----------------------------------------------------+
ImageJpeg ($newimg,$this->dstimg);}if($ratio<$resize_ratio){$newimg = imagecreatetruecolor(($this->resize_height)*$ratio,$this->resize_height);imagecopyresampled($newimg, $this->im, 0, 0, 0, 0, ($this->resize_height)*$ratio, $this->resize_height, $this->width, $this->height);
// +----------------------------------------------------+//
| 增加LOGO到缩略图中 Modify By Ice
// +----------------------------------------------------+
ImageCopy($newimg, $logoImage, 0, 0, 0, 0, $logoW, $logoH);
// +----------------------------------------------------+
ImageJpeg ($newimg,$this->dstimg);}}
// +----------------------------------------------------+
// | 释放资源 Modify By Ice
// +----------------------------------------------------+ImageDestroy($logoImage);
// +----------------------------------------------------+}
//初始化图象
function initi_img()
{
if($this->type=="jpg")
{$this->im = imagecreatefromjpeg($this->srcimg);}
if($this->type=="gif"){$this->im = imagecreatefromgif($this->srcimg);}
if($this->type=="png"){$this->im = imagecreatefrompng($this->srcimg);}}
//图象目标地址
function dst_img()
{
$full_length = strlen($this->srcimg);
$type_length = strlen($this->type);
$name_length = $full_length-$type_length;
$name = substr($this->srcimg,0,$name_length-1);
$this->dstimg = $name."_small".".".$this->type;
}
//程序最后取得图片地址function getImg(){return $this->dstimg;}}?>
操作文件很简单,只要把类文件看懂了,这个程序不值一提,是我写的,肯定是没有上面规范的!
<?PHP
$imgPath = "./name.jpg";
$imgHeight = 60;
$imgWidth = 80;
$isCut = 0;
require "img.inc.php";
$img = new resizeimage($imgPath,$imgWidth,$imgHeight,$isCut);
$newImg = $img -> getImg();?>
<IMG src="<? echo $newImg; ?>">

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