图片生成缩略图类

<? //==================================================== // 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 [email protected] //==================================================== 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; $html = "<img src="$file" mce_src="$file" style="border:1px solid #000" mce_style="border:1px solid #000"/>"; echo $html; } //========================================== // 函数: displayMark($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; $html = "<img src="$file" mce_src="$file" style="border:1px solid #000" mce_style="border:1px solid #000"/>"; 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; } } ?>