automatically resize uploaded images

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automatically resize uploaded images

Postby Heinrich von Westphalen » 15 Oct 2014, 12:33

Hello manutoo,
can you add automatically resize uploaded images to avoid oversized images, especially for mobile devices?


GUIDE

Open ./includes/functions_posting.php and locate the following line (~ line 434):

Code: Select all
 $file->move_file($config['upload_path'], false, $no_image);

Insert the following code before this line:

Code: Select all
  // Modify these params accordingly to suit your installation
  $nMaxWidth = 690;
  $nMaxHeight = 800;
  $nJPEGCompression = 90;

  if (strpos($file->get('mimetype'), 'image/') === 0) {
    $sImgSourceFilename = $file->get('filename');
    if ($arrImageData = @getimagesize($sImgSourceFilename)) {

      $nImageType = $arrImageData[2];

      switch ($nImageType) {
        case IMG_GIF:
          $imgSource = @imagecreatefromgif($sImgSourceFilename);
          break;
        case IMG_JPG:
          $imgSource = @imagecreatefromjpeg($sImgSourceFilename);
          break;
        case IMG_PNG:
          $imgSource = @imagecreatefrompng($sImgSourceFilename);
          break;
        case IMG_WBMP:
          $imgSource = @imagecreatefromwbmp($sImgSourceFilename);
          break;
        default:
          $imgSource = null;
          break;
      }

      if ($imgSource) {
        $nImgWidth = $arrImageData[0];
        $nImgHeight = $arrImageData[1];

        $doResize = false;
        if ($nImgHeight > $nMaxHeight || $nImgWidth > $nMaxWidth) {
          $doResize = true;
          if ($nImgHeight > $nMaxHeight) {
            $nRatio = ($nImgWidth / $nImgHeight);
            $nImgHeight = $nMaxHeight;
            $nImgWidth = round($nMaxHeight * $nRatio);
          }
          if ($nImgWidth > $nMaxWidth) {
            $nRatio = ($nImgHeight / $nImgWidth);
            $nImgWidth = $nMaxWidth;
            $nImgHeight = round($nMaxWidth * $nRatio);
          }
        }

        if ($doResize) {
          $imgScaled = ImageCreateTrueColor($nImgWidth, $nImgHeight);
          if (imagecopyresampled($imgScaled, $imgSource, 0, 0, 0, 0, $nImgWidth, $nImgHeight, $arrImageData[0], $arrImageData[1]))
            imagejpeg($imgScaled, $sImgSourceFilename, $nJPEGCompression);
          imageDestroy($imgScaled);
        }
        imageDestroy($imgSource);
      }
    }


Thanks in advance.

Kind regards,
Heinrich von Westphalen.
Heinrich von Westphalen
crazy of the little yellow ball
crazy of the little yellow ball
 
Messages: 1480
Gaming Since: 12 Dec 2012, 05:48
Location: Germany

Re: automatically resize uploaded images

Postby manutoo » 16 Oct 2014, 05:21

Hello,

I turned on the thumbnail generation for large picture (couldn't set it for the dimensions, only the file size :sweat: ).
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2014-10 Abandoned Palace #1.jpg
ManuTOO
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Re: automatically resize uploaded images

Postby Nigogu » 03 Nov 2014, 05:42

It looks like you solved that problem manutoo, but can this be applied in old attachments :?:

Regards :) .
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Re: automatically resize uploaded images

Postby manutoo » 04 Nov 2014, 04:38

Nigogu,
unfortunately, no.
ManuTOO
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