PHP给图片生成缩略图和加版权的类_PHP

最近几天看了一下php的图片处理方面的功能，以前这方面的需求比较少，也就没怎么看，最近有空看了一下。感觉图片处理一些简单的功能还可以，复杂的就算了，gd库都2.0.1了，还是不支持中文，看了几篇文章，想使用中文只能先将gb2312转换成unicode再写入图片，太麻烦了，索性只使用英文算了。

在图像生成部分可以定义图片的最大高，宽，比较适用于新闻及相册等系统。

gd2.0.1在图片处理上有很大提高，我试了下imagecopyresized和imagecopyresampled，后者处理的图片明显好于前者，据手册上讲后者对改变大小后的图片重新采样基本保持不失真，生成缩略图的效果还真不错。

-------------------------------------------------------------下面是类-----------------------// FileName:GDImage.inc.php// Summary: 图片处理程序// Author: ice_berg16(寻梦的稻草人)// CreateTime: 2004-10-12// LastModifed:2004-10-12// copyright (c)2004 ice_berg16@163.com//====================================================class GDImage{var $sourcePath; //图片存储路径var $galleryPath; //图片缩略图存储路径var $toFile = false; //是否生成文件var $fontName; //使用的TTF字体名称var $maxWidth = 500; //图片最大宽度var $maxHeight = 600; //图片最大高度//==========================================// 函数: GDImage($sourcePath ,$galleryPath, $fontPath)// 功能: constructor// 参数: $sourcePath 图片源路径(包括最后一个"/")// 参数: $galleryPath 生成图片的路径// 参数: $fontPath 字体路径//==========================================function GDImage($sourcePath, $galleryPath, $fontPath){$this->sourcePath = $sourcePath;$this->galleryPath = $galleryPath;$this->fontName = $fontPath . "04B_08__.TTF";}//==========================================// 函数: makeThumb($sourFile,$width=128,$height=128)// 功能: 生成缩略图(输出到浏览器)// 参数: $sourFile 图片源文件// 参数: $width 生成缩略图的宽度// 参数: $height 生成缩略图的高度// 返回: 0 失败 成功时返回生成的图片路径//==========================================function makeThumb($sourFile,$width=128,$height=128){$imageInfo = $this->getInfo($sourFile);$sourFile = $this->sourcePath . $sourFile;$newName = substr($imageInfo["name"], 0, strrpos($imageInfo["name"], ".")) . "_thumb.jpg";switch ($imageInfo["type"]){case 1: //gif$img = imagecreatefromgif($sourFile);break;case 2: //jpg$img = imagecreatefromjpeg($sourFile);break;case 3: //png$img = imagecreatefrompng($sourFile);break;default:return 0;break;}if (!$img) return 0;$width = ($width > $imageInfo["width"]) ? $imageInfo["width"] : $width;$height = ($height > $imageInfo["height"]) ? $imageInfo["height"] : $height;$srcW = $imageInfo["width"];$srcH = $imageInfo["height"];if ($srcW * $width > $srcH * $height)$height = round($srcH * $width / $srcW);else$width = round($srcW * $height / $srcH);//*if (function_exists("imagecreatetruecolor")) //GD2.0.1{$new = imagecreatetruecolor($width, $height);ImageCopyResampled($new, $img, 0, 0, 0, 0, $width, $height, $imageInfo["width"], $imageInfo["height"]);}else{$new = imagecreate($width, $height);ImageCopyResized($new, $img, 0, 0, 0, 0, $width, $height, $imageInfo["width"], $imageInfo["height"]);}//*/ if ($this->toFile){if (file_exists($this->galleryPath . $newName)) unlink($this->galleryPath . $newName);ImageJPEG($new, $this->galleryPath . $newName);return $this->galleryPath . $newName;}else{ImageJPEG($new);}ImageDestroy($new);ImageDestroy($img);}//==========================================// 函数: waterMark($sourFile, $text)// 功能: 给图片加水印// 参数: $sourFile 图片文件名// 参数: $text 文本数组(包含二个字符串)// 返回: 1 成功 成功时返回生成的图片路径//==========================================function waterMark($sourFile, $text){$imageInfo = $this->getInfo($sourFile);$sourFile = $this->sourcePath . $sourFile;$newName = substr($imageInfo["name"], 0, strrpos($imageInfo["name"], ".")) . "_mark.jpg";switch ($imageInfo["type"]){case 1: //gif$img = imagecreatefromgif($sourFile);break;case 2: //jpg$img = imagecreatefromjpeg($sourFile);break;case 3: //png$img = imagecreatefrompng($sourFile);break;default:return 0;break;}if (!$img) return 0;$width = ($this->maxWidth > $imageInfo["width"]) ? $imageInfo["width"] : $this->maxWidth;$height = ($this->maxHeight > $imageInfo["height"]) ? $imageInfo["height"] : $this->maxHeight;$srcW = $imageInfo["width"];$srcH = $imageInfo["height"];if ($srcW * $width > $srcH * $height)$height = round($srcH * $width / $srcW);else$width = round($srcW * $height / $srcH);//*if (function_exists("imagecreatetruecolor")) //GD2.0.1{$new = imagecreatetruecolor($width, $height);ImageCopyResampled($new, $img, 0, 0, 0, 0, $width, $height, $imageInfo["width"], $imageInfo["height"]);}else{$new = imagecreate($width, $height);ImageCopyResized($new, $img, 0, 0, 0, 0, $width, $height, $imageInfo["width"], $imageInfo["height"]);}$white = imageColorAllocate($new, 255, 255, 255);$black = imageColorAllocate($new, 0, 0, 0);$alpha = imageColorAllocateAlpha($new, 230, 230, 230, 40);//$rectW = max(strlen($text[0]),strlen($text[1]))*7;ImageFilledRectangle($new, 0, $height-26, $width, $height, $alpha);ImageFilledRectangle($new, 13, $height-20, 15, $height-7, $black);ImageTTFText($new, 4.9, 0, 20, $height-14, $black, $this->fontName, $text[0]);ImageTTFText($new, 4.9, 0, 20, $height-6, $black, $this->fontName, $text[1]);//*/ if ($this->toFile){if (file_exists($this->galleryPath . $newName)) unlink($this->galleryPath . $newName);ImageJPEG($new, $this->galleryPath . $newName);return $this->galleryPath . $newName;}else{ImageJPEG($new);}ImageDestroy($new);ImageDestroy($img);}//==========================================// 函数: displayThumb($file)// 功能: 显示指定图片的缩略图// 参数: $file 文件名// 返回: 0 图片不存在//==========================================function displayThumb($file){$thumbName = substr($file, 0, strrpos($file, ".")) . "_thumb.jpg";$file = $this->galleryPath . $thumbName;if (!file_exists($file)) return 0;$html =  ""ho $html;}//==========================================// 函数: displayMark($file)// 功能: 显示指定图片的水印图// 参数: $file 文件名// 返回: 0 图片不存在//==========================================function displayMark($file){$markName = substr($file, 0, strrpos($file, ".")) . "_mark.jpg";$file = $this->galleryPath . $markName;if (!file_exists($file)) return 0;$html = "";echo $html;}//==========================================// 函数: getInfo($file)// 功能: 返回图像信息// 参数: $file 文件路径// 返回: 图片信息数组//==========================================function getInfo($file){$file = $this->sourcePath . $file;$data = getimagesize($file);$imageInfo["width"] = $data[0];$imageInfo["height"]= $data[1];$imageInfo["type"] = $data[2];$imageInfo["name"] = basename($file);return $imageInfo;}}?>----------------------------------下面是使用方法这个类使用了一个04B_08__.TTF字体使用类的时候指定该字体路径即可-----------------------------------require_once("GDImage.inc.php");//header("Content-type: image/jpeg");//输出到浏览器的话别忘了打开这个$img = new GDImage(IB_UPLOAD_PATH, IB_GALLERY, IB_TEMP);$text = array("ice-berg.org","all rights reserved");$img->maxWidth = $img->maxHeight = 300;$img->toFile = true;$img->waterMark("mm.jpg", $text);$img->makeThumb("mm.jpg");$img->displayThumb("mm.jpg");$img->displayMark("mm.jpg");