Resize fluxBB profile avatars to allow uploading large files.

fluxbbresize.php

<?php
/*******************************
 * copyright 2015 David Berard
 * In profile.php, find the place dealing with $action=='upload_avatar' || $action=='upload_avatar2'
 * Near the end of the file it writes the image to file.
 * Once writing to file, use these functions to resize, eg.
 * gl_resize('/path/to/file', '/path/to/file', '.jpg or .png or .gif')
 * Also remember to allow large files in administrator settings and large dimensions.
 * 
 * Must have PHP GD enabled/installed.
********************************/

define('GL_IMAGE_SL', 120);

function gl_getTheImage($fname, $f_type)
{
  $ftype = strtolower($f_type);
  $src_image = false;
  if($ftype == "jpeg" || $ftype == "jpg" || $ftype==".jpg" || $ftype==".jpeg" || $ftype == "image/jpeg")
    $src_image = imagecreatefromjpeg($fname);
  if($ftype == ".png" || $ftype == "png" || $ftype == "image/png")
    $src_image = imagecreatefrompng($fname);
  if($ftype == ".gif" || $ftype == "gif" || $ftype == "image/gif")
    $src_image = imagecreatefromgif($fname);
  return $src_image;
}

function gl_imagewrite($fname, $fdata, $f_type)
{
  //$fname = "/srv/http/fluxBB/img/avatars/abc.jpg";
  $ftype = strtolower($f_type);
  if($ftype == ".jpg" || $ftype == "jpeg" || $ftype == "jpg" || $ftype == "image/jpeg")
    imagejpeg($fdata, $fname);
  if($ftype == ".png" || $ftype == "png" || $ftype == "image/png")
    imagepng($fdata, $fname);
  if($ftype == ".gif" || $ftype == "gif" || $ftype == "image/gif")
    imagegif($fdata, $fname);
}

function gl_resize($fin, $fout, $ftype)
{
  $src_image = gl_getTheImage($fin, $ftype);
  $old_x=imageSX($src_image);
  $old_y=imageSY($src_image);
  if($old_x <= 120 && $old_y <= 120)
  {
    gl_imagewrite($fout, $src_image, $ftype);
  }
  $new_x = $new_y = GL_IMAGE_SL;
  if($old_x < $new_x)
    $new_x = $old_x;
  if($old_y < $new_y)
    $new_y = $old_y;
  $dst_img;
  if($old_x < $old_y) // Smaller dimension to 120
  {
    $rat_x = GL_IMAGE_SL;
    $rat_y = intval(GL_IMAGE_SL*$old_x/$old_y);
    $dst_img=ImageCreateTrueColor($rat_x,$rat_y);
    imagecopyresampled($dst_img,
      $src_image,
      0, 0, // dst x, dst y
      0, intval(($old_y-$old_x)/2), // src x, src y
      $new_x, $new_y,
      $old_x, $old_x);
  }
  else
  {
    $rat_y = GL_IMAGE_SL;
    $rat_x = intval(GL_IMAGE_SL*$old_y/$old_x);
    //$dst_img=ImageCreateTrueColor($rat_x,$rat_y);
    $dst_img=ImageCreateTrueColor($new_x, $new_y);
    imagecopyresampled($dst_img,
      $src_image,
      0, 0, // dst x, dst y
      intval(($old_x-$old_y)/2), 0, // src x, src y
      //0, 0, // src x, src y
      $new_x, $new_y,
      $old_y, $old_y);
  }
}

?>