What to do if Dreamweaver thumbnails are distorted and blurry

What should I do if the Dreamweaver thumbnail is distorted and blurred?

Dreamweaver DEDECMS The ultimate perfect solution to thumbnail distortion and blur

Since dede only generates thumbnails of one size by default, they are often different in one site. The required thumbnails on the page are inconsistent in size and proportion, which results in unclear and distorted thumbnails. The method provided below perfectly solves this problem.

Recommended learning: dedecms tutorial

Usage:

1. To get clear thumbnails, you must have enough Large pictures should be cropped accurately, and the following method is to crop based on the thumbnail (because some websites of the original picture have watermarks), so it is necessary to ensure that the original thumbnail is large enough;

So it is necessary to The following settings: System - Attachment Settings, set the default width and default height of thumbnails to be greater than or equal to the maximum size of all thumbnails called in your entire site. Please also cut it to a large enough size for manual cutting (no need for manual cutting)

2. Open include/extend.func.php (Note: This file is prepared for secondary development and used for functional method expansion)

Add the following code before the last ?>

function thumb($imgurl, $width, $height, $bg = true) 
 { 
 global $cfg_mainsite,$cfg_multi_site; 
 $thumb = eregi("",$imgurl)?str_replace($cfg_mainsite,'',$imgurl):$imgurl; 
 list($thumbname,$extname) = explode('.',$thumb); 
 $newthumb = $thumbname.'_'.$width.'_'.$height.'.'.$extname; 
if(!$thumbname || !$extname || !file_exists(DEDEROOT.$thumb)) return $imgurl; 
 if(!file_exists(DEDEROOT.$newthumb)) 
{ 
 include_once DEDEINC.'/image.func.php'; 
 if($bg==true) 
 { 
 ImageResizeNew(DEDEROOT.$thumb, $width, $height, DEDEROOT.$newthumb); 
 } 
 else 
 { 
 ImageResize(DEDEROOT.$thumb, $width, $height, DEDEROOT.$newthumb); 
 } 
 } 
 return $cfg_multi_site=='Y'?$cfg_mainsite.$newthumb:$newthumb; 
 }

Calling method:

Tag:

[field:picname function='thumb(@me,$width,$height,$bg)'/]

Parameter description:

$width: thumbnail width (integer)

$height: thumbnail Thumbnail height (integer)

$bg: Whether to fill with blanks, automatically filled by default, background fill color is in the system-attachment settings (true/false)

Example:

Call a thumbnail with a length and width of 100 pixels: [field:picname function='thumb(@me,100,100)'/]

Retain the original proportion and do not automatically fill (not recommended): [field: picname function='thumb(@me,100,100,false)'/]

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