Dedecms scale down the cropped thumbnail by Aspect ratio

Because the dededemsv5.6 thumbnail generation method is scaled down proportionally, as with the previous version issue, the dededecms official may not have noticed, or they think this is the best way to generate thumbnails, if the width and height ratio of the image are not suitable, the thumbnail will be compressed very poorly. here, I first scale down the image because the DEDECMSv5.6 thumbnails are generated proportionally, as with previous versions, the dedecms official team may not have noticed it at all, or they think this is the best way to generate thumbnails.
In this case, if the image's width and height ratio are not suitable, the thumbnail will be compressed very poorly. here, I first scale down the image by width or height, when the size of the thumbnail is exceeded, the displayed thumbnail is much better than the original one.
Default dedecms5.6 default generated thumbnail, thumbnail size: 100*100 (directly reduce the image)
Modify as follows:
Open the/uplodes/image. func. php file,
// Auto-generated function for image shrinking. the source supports bmp, gif, jpg, and png.
// The generated small image only uses jpg or png format.
Find row 44th function ImageResize
To
// Obtain code between GD versions
Use the following code to overwrite (please note that backup is required ).
Function ImageResize ($ srcFile, $ toW, $ toH, $ toFile = "")
{
Global $ pai_photo_type;
If ($ toFile = "")
{
$ ToFile = $ srcFile;
}
$ Info = "";
$ SrcInfo = GetImageSize ($ srcFile, $ info );
Switch ($ srcInfo [2])
{
Case 1:
If (! $ Pai_photo_type ['GIF'])
{
Return false;
}
$ Im = imagecreatefromgif ($ srcFile );
Break;
Case 2:
If (! $ Pai_photo_type ['jpeg '])
{
Return false;
}
$ Im = imagecreatefromjpeg ($ srcFile );
Break;
Case 3:
If (! $ Pai_photo_type ['PNG '])
{
Return false;
}
$ Im = imagecreatefrompng ($ srcFile );
Break;
Case 6:
If (! $ Pai_photo_type ['bmp '])
{
Return false;
}
$ Im = imagecreatefromwbmp ($ srcFile );
Break;
}
$ SrcW = ImageSX ($ im );
$ SrcH = ImageSY ($ im );
If ($ srcW
{
Return true;
}
// Scale down to generate and crop
$ NewW = $ toH * $ srcW/$ srcH;
$ NewH = $ toW * $ srcH/$ srcW;
If ($ newH >=$ toH)
{
$ FtoW = $ toW;
$ FtoH = $ newH;
}
Else
{
$ FtoW = $ newW;
$ FtoH = $ toH;
}
If ($ srcW> $ toW | $ srcH> $ toH)
{
If (function_exists ("imagecreatetruecolor "))
{
@ $ Ni = imagecreatetruecolor ($ ftoW, $ ftoH );
If ($ ni)
{
Imagecopyresampled ($ ni, $ im, 0, 0, 0, $ ftoW, $ ftoH, $ srcW, $ srcH );
}
Else
{
$ Ni = imagecreate ($ ftoW, $ ftoH );
Imagecopyresized ($ ni, $ im, 0, 0, 0, $ ftoW, $ ftoH, $ srcW, $ srcH );
}
}
Else
{
$ Ni = imagecreate ($ ftoW, $ ftoH );
Imagecopyresized ($ ni, $ im, 0, 0, 0, $ ftoW, $ ftoH, $ srcW, $ srcH );
}
// Crop the image to a standard thumbnail $ new_imgx = imagecreatetruecolor ($ toW, $ toH );
If ($ newH >=$ toH)
{
Imagecopyresampled ($ new_imgx, $ ni, 0, 0, ($ newH-$ toH)/2, $ toW, $ toH, $ toW, $ toH );
}
Else
{
Imagecopyresampled ($ new_imgx, $ ni, ($ newW-$ toW)/, $ toW, $ toH, $ toW, $ toH );
}
Switch ($ srcInfo [2])
{
Case 1:
Imagegif ($ new_imgx, $ toFile );
Break;
Case 2:
Imagejpeg ($ new_imgx, $ toFile, 85 );
Break;
Case 3:
Imagepng ($ new_imgx, $ toFile );
Break;
Case 6:
Imagebmp ($ new_imgx, $ toFile );
Break;
Default:
Return false;
}
Imagedestroy ($ new_imgx );
Imagedestroy ($ ni );
}
Imagedestroy ($ im );
Return true;
}