–> 文章介绍
背景:dedecms生成缩略图的原理不够灵活导致缩略图变形,比如后台设置缩略图的尺码为:120*90即为3:2的图片,但是假如内容里的大图尺码为300*300即1:1,这样生成出来的图片就会变形,严重影响网站美观,本文介绍通过修改dedecms生成缩略源码方法解决定问题
打开“include/image.func.php”文件,该文件在dedecms5.6,5.7中所在的目录不一样,5.6中文件在/include/下,5.7中文件在/include/helpers/,如果你懒的找可以直接在网站根目录搜索image.func.php文件
如果你使用的是dedecms5.7,打开目录/include/helpers/找到image.helper.php文件
如果你使用的是dedecms5.6,打开目录/include/找到image.func.php文件
5.7版image.helper.php修改方法
替换
/**
* 缩图片自动生成函数,来源支持bmp、gif、jpg、png
* 但生成的小图只用jpg或png格式
*
* @access public
* @param string $srcFile 图片路径
* @param string $toW 转换到的宽度
* @param string $toH 转换到的高度
* @param string $toFile 输出文件到
* @return string
*/
至
/**
* 获得GD的版本
*
* @access public
* @return int
*/
中间的代码为:
001if ( ! function_exists('ImageResize'))002{003 function ImageResize($srcFile,$toW,$toH,$toFile="")004{005global $cfg_photo_type;006if($toFile=="")007{008 $toFile = $srcFile;009}010$info = "";011$srcInfo = GetImageSize($srcFile,$info);012switch ($srcInfo[2])013{014 case 1:015 if(!$cfg_photo_type['gif'])016 {017 return false;018 }019 $im = imagecreatefromgif($srcFile);020 break;021 case 2:022 if(!$cfg_photo_type['jpeg'])023 {024 return false;025 }026 $im = imagecreatefromjpeg($srcFile);027 break;028 case 3:029 if(!$cfg_photo_type['png'])030 {031 return false;032 }033 $im = imagecreatefrompng($srcFile);034 break;035 case 6:036 if(!$cfg_photo_type['bmp'])037 {038 return false;039 }040 $im = imagecreatefromwbmp($srcFile);041 break;042}043$srcW=ImageSX($im);044$srcH=ImageSY($im);045if($srcW<=$toW && $srcH<=$toH )046{047 return true;048}049//缩略生成并裁剪050$newW = $toH * $srcW / $srcH;051 $newH = $toW * $srcH / $srcW;052if($newH >= $toH)053{054 $ftoW = $toW;055 $ftoH = $newH;056}057else058{059 $ftoW = $newW;060 $ftoH = $toH;061}062 if($srcW>$toW||$srcH>$toH)063{064 if(function_exists("imagecreatetruecolor"))065 {066 @$ni = imagecreatetruecolor($ftoW,$ftoH);067 if($ni)068 {069 imagecopyresampled($ni,$im,0,0,0,0,$ftoW,$ftoH,$srcW,$srcH);070 }071 else072 {073 $ni=imagecreate($ftoW,$ftoH);074 imagecopyresized($ni,$im,0,0,0,0,$ftoW,$ftoH,$srcW,$srcH);075 }076 }077 else078 {079 $ni=imagecreate($ftoW,$ftoH);080 imagecopyresized($ni,$im,0,0,0,0,$ftoW,$ftoH,$srcW,$srcH);081 }082 //裁剪图片成标准缩略图083 $new_imgx = imagecreatetruecolor($toW,$toH);084 if($newH >= $toH)085 {086 imagecopyresampled($new_imgx,$ni,0,0,0,($newH - $toH)/2,$toW,$toH,$toW,$toH);087 }088 else089 {090 imagecopyresampled($new_imgx,$ni,0,0,($newW - $toW)/2,0,$toW,$toH,$toW,$toH);091 }092 switch ($srcInfo[2])093 {094 case 1:095 imagegif($new_imgx,$toFile);096 break;097 case 2:098 imagejpeg($new_imgx,$toFile,85);099 break;100 case 3:101 imagepng($new_imgx,$toFile);102 break;103 case 6:104 imagebmp($new_imgx,$toFile);105 break;106 default:107 return false;108 }109 imagedestroy($new_imgx);110 imagedestroy($ni);111}112imagedestroy($im);113return true;114}115}
修改好后保存文件即可,赶紧添加个带图片的文章试试吧,如果你不愿意修改可直接
5.6版image.func.php修改方法
替换
//缩图片自动生成函数,来源支持bmp、gif、jpg、png
至
//获得GD的版本
中间的代码为:
001function ImageResize($srcFile,$toW,$toH,$toFile="")002{003global $cfg_photo_type;004if($toFile=="")005{006 $toFile = $srcFile;007}008$info = "";009$srcInfo = GetImageSize($srcFile,$info);010switch ($srcInfo[2])011{012 case 1:013 if(!$cfg_photo_type['gif'])014 {015 return false;016 }017 $im = imagecreatefromgif($srcFile);018 break;019 case 2:020 if(!$cfg_photo_type['jpeg'])021 {022 return false;023 }024 $im = imagecreatefromjpeg($srcFile);025 break;026 case 3:027 if(!$cfg_photo_type['png'])028 {029 return false;030 }031 $im = imagecreatefrompng($srcFile);032 break;033 case 6:034 if(!$cfg_photo_type['bmp'])035 {036 return false;037 }038 $im = imagecreatefromwbmp($srcFile);039 break;040}041$srcW=ImageSX($im);042$srcH=ImageSY($im);043if($srcW<=$toW && $srcH<=$toH )044{045 return true;046}047//缩略生成并裁剪048$newW = $toH * $srcW / $srcH;049 $newH = $toW * $srcH / $srcW;050if($newH >= $toH)051{052 $ftoW = $toW;053 $ftoH = $newH;054}055else056{057 $ftoW = $newW;058 $ftoH = $toH;059}060 if($srcW>$toW||$srcH>$toH)061{062 if(function_exists("imagecreatetruecolor"))063 {064 @$ni = imagecreatetruecolor($ftoW,$ftoH);065 if($ni)066 {067 imagecopyresampled($ni,$im,0,0,0,0,$ftoW,$ftoH,$srcW,$srcH);068 }069 else070 {071 $ni=imagecreate($ftoW,$ftoH);072 imagecopyresized($ni,$im,0,0,0,0,$ftoW,$ftoH,$srcW,$srcH);073 }074 }075 else076 {077 $ni=imagecreate($ftoW,$ftoH);078 imagecopyresized($ni,$im,0,0,0,0,$ftoW,$ftoH,$srcW,$srcH);079 }080 //裁剪图片成标准缩略图081 $new_imgx = imagecreatetruecolor($toW,$toH);082 if($newH >= $toH)083 {084 imagecopyresampled($new_imgx,$ni,0,0,0,($newH - $toH)/2,$toW,$toH,$toW,$toH);085 }086 else087 {088 imagecopyresampled($new_imgx,$ni,0,0,($newW - $toW)/2,0,$toW,$toH,$toW,$toH);089 }090 switch ($srcInfo[2])091 {092 case 1:093 imagegif($new_imgx,$toFile);094 break;095 case 2:096 imagejpeg($new_imgx,$toFile,85);097 break;098 case 3:099 imagepng($new_imgx,$toFile);100 break;101 case 6:102 imagebmp($new_imgx,$toFile);103 break;104 default:105 return false;106 }107 imagedestroy($new_imgx);108 imagedestroy($ni);109}110imagedestroy($im);111return true;112}
可以直接
因dedecms版本的不同代码有所不一样,如果有问题可以找织梦58帮忙解决
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