From 5cc690bbee21481526931942eb541ab9e64edf01 Mon Sep 17 00:00:00 2001
From: Chris <christian@haschek.at>
Date: Sun, 30 Dec 2018 19:24:56 +0100
Subject: [PATCH] added filters

---
 content-controllers/image/filters.php         | 278 ++++++++++++++++++
 .../image/image.controller.php                |  27 ++
 2 files changed, 305 insertions(+)

diff --git a/content-controllers/image/filters.php b/content-controllers/image/filters.php
index e69de29..aa26129 100644
--- a/content-controllers/image/filters.php
+++ b/content-controllers/image/filters.php
@@ -0,0 +1,278 @@
+<?php 
+
+function getFilters()
+{
+    return get_class_methods('Filter');
+}
+
+class Filter {
+	public function sepia($im,$val) {
+		
+		imagefilter($im, IMG_FILTER_GRAYSCALE);
+		imagefilter($im, IMG_FILTER_COLORIZE, 100, 50, 0);
+		
+		return $im;
+	}
+	public function sepia2($im,$val) {
+		imagefilter($im, IMG_FILTER_GRAYSCALE);
+		imagefilter($im, IMG_FILTER_BRIGHTNESS, -10);
+		imagefilter($im, IMG_FILTER_CONTRAST, -20);
+		imagefilter($im, IMG_FILTER_COLORIZE, 60, 30, -15);
+		return $im;
+	}
+	public function sharpen($im,$val) {
+		
+		$gaussian = array(
+				array(1.0, 1.0, 1.0),
+				array(1.0, -7.0, 1.0),
+				array(1.0, 1.0, 1.0)
+		);
+		imageconvolution($im, $gaussian, 1, 4);
+		
+		return $im;
+	}
+	public function emboss($im,$val) {
+		
+		$gaussian = array(
+				array(-2.0, -1.0, 0.0),
+				array(-1.0, 1.0, 1.0),
+				array(0.0, 1.0, 2.0)
+		);
+		
+		imageconvolution($im, $gaussian, 1, 5);
+		
+		return $im;
+	}
+	public function cool($im,$val) {
+		
+		imagefilter($im, IMG_FILTER_MEAN_REMOVAL);
+		imagefilter($im, IMG_FILTER_CONTRAST, -50);
+		
+		return $im;
+	}
+	public function light($im,$val) {
+		
+		imagefilter($im, IMG_FILTER_BRIGHTNESS, 10);
+		imagefilter($im, IMG_FILTER_COLORIZE, 100, 50, 0, 10);
+		
+		return $im;
+	}
+	public function aqua($im,$val) {
+		
+		imagefilter($im, IMG_FILTER_COLORIZE, 0, 70, 0, 30);
+		
+		return $im;
+	}
+	public function fuzzy($im,$val) {
+		
+		$gaussian = array(
+				array(1.0, 1.0, 1.0),
+				array(1.0, 1.0, 1.0),
+				array(1.0, 1.0, 1.0)
+		);
+		imageconvolution($im, $gaussian, 9, 20);
+		
+		return $im;
+	}
+	public function boost($im,$val) {
+		
+		imagefilter($im, IMG_FILTER_CONTRAST, -35);
+		imagefilter($im, IMG_FILTER_BRIGHTNESS, 10);
+		
+		return $im;
+	}
+	public function boost2($im,$val) {
+		imagefilter( $im, IMG_FILTER_CONTRAST, -35);
+		imagefilter( $im, IMG_FILTER_COLORIZE, 25, 25, 25);
+		return $im;
+	}
+	public function gray($im,$val) {
+		
+		imagefilter($im, IMG_FILTER_CONTRAST, -60);
+		imagefilter($im, IMG_FILTER_GRAYSCALE);
+		
+		return $im;
+	}
+	public function antique($im,$val) {
+		imagefilter($im, IMG_FILTER_BRIGHTNESS, 0);
+		imagefilter($im, IMG_FILTER_CONTRAST, -30);
+		imagefilter($im, IMG_FILTER_COLORIZE, 75, 50, 25);
+		return $im;
+	}
+	public function blackwhite($im,$val) {
+		imagefilter($im, IMG_FILTER_GRAYSCALE);
+		imagefilter($im, IMG_FILTER_BRIGHTNESS, 10);
+		imagefilter($im, IMG_FILTER_CONTRAST, -20);
+		return $im;
+	}
+	public function vintage($im,$val) {
+		imagefilter($im, IMG_FILTER_BRIGHTNESS, 10);
+		imagefilter($im, IMG_FILTER_GRAYSCALE);
+		imagefilter($im, IMG_FILTER_COLORIZE, 40, 10, -15);
+		return $im;
+	}
+	
+	public function concentrate($im,$val) {
+		imagefilter($im, IMG_FILTER_GAUSSIAN_BLUR);
+		imagefilter($im, IMG_FILTER_SMOOTH, -10);
+		return $im;
+	}
+	
+	public function hermajesty($im,$val) {
+		imagefilter($im, IMG_FILTER_BRIGHTNESS, -10);
+		imagefilter($im, IMG_FILTER_CONTRAST, -5);
+		imagefilter($im, IMG_FILTER_COLORIZE, 80, 0, 60);
+		return $im;
+	}
+	public function everglow($im,$val) {
+		imagefilter($im, IMG_FILTER_BRIGHTNESS, -30);
+		imagefilter($im, IMG_FILTER_CONTRAST, -5);
+		imagefilter($im, IMG_FILTER_COLORIZE, 30, 30, 0);
+		return $im;
+	}
+	public function freshblue($im,$val) {
+		imagefilter($im, IMG_FILTER_CONTRAST, -5);
+		imagefilter($im, IMG_FILTER_COLORIZE, 20, 0, 80, 60);
+		return $im;
+	}
+	public function tender($im,$val) {
+		imagefilter($im, IMG_FILTER_CONTRAST, 5);
+		imagefilter($im, IMG_FILTER_COLORIZE, 80, 20, 40, 50);
+		imagefilter($im, IMG_FILTER_COLORIZE, 0, 40, 40, 100);
+		imagefilter($im, IMG_FILTER_SELECTIVE_BLUR);
+		return $im;
+	}
+	public function dream($im,$val) {
+		imagefilter($im, IMG_FILTER_COLORIZE, 150, 0, 0, 50);
+		imagefilter($im, IMG_FILTER_NEGATE);
+		imagefilter($im, IMG_FILTER_COLORIZE, 0, 50, 0, 50);
+		imagefilter($im, IMG_FILTER_NEGATE);
+		imagefilter($im, IMG_FILTER_GAUSSIAN_BLUR);
+		return $im;
+	}
+	public function frozen($im,$val) {
+		imagefilter($im, IMG_FILTER_BRIGHTNESS, -15);
+		imagefilter($im, IMG_FILTER_COLORIZE, 0, 0, 100, 50);
+		imagefilter($im, IMG_FILTER_COLORIZE, 0, 0, 100, 50);
+		imagefilter($im, IMG_FILTER_GAUSSIAN_BLUR);
+		return $im;
+	}
+	public function forest($im,$val) {
+		imagefilter($im, IMG_FILTER_COLORIZE, 0, 0, 150, 50);
+		imagefilter($im, IMG_FILTER_NEGATE);
+		imagefilter($im, IMG_FILTER_COLORIZE, 0, 0, 150, 50);
+		imagefilter($im, IMG_FILTER_NEGATE);
+		imagefilter($im, IMG_FILTER_SMOOTH, 10);
+		return $im;
+	}
+	public function rain($im,$val) {
+		imagefilter($im, IMG_FILTER_GAUSSIAN_BLUR);
+		imagefilter($im, IMG_FILTER_MEAN_REMOVAL);
+		imagefilter($im, IMG_FILTER_NEGATE);
+		imagefilter($im, IMG_FILTER_COLORIZE, 0, 80, 50, 50);
+		imagefilter($im, IMG_FILTER_NEGATE);
+		imagefilter($im, IMG_FILTER_SMOOTH, 10);
+		return $im;
+	}
+	public function orangepeel($im,$val) {
+		imagefilter($im, IMG_FILTER_COLORIZE, 100, 20, -50, 20);
+		imagefilter($im, IMG_FILTER_SMOOTH, 10);
+		imagefilter($im, IMG_FILTER_BRIGHTNESS, -10);
+		imagefilter($im, IMG_FILTER_CONTRAST, 10);
+		imagegammacorrect($im, 1, 1.2 );
+		return $im;
+	}
+	public function darken($im,$val) {
+		imagefilter($im, IMG_FILTER_GRAYSCALE);
+		imagefilter($im, IMG_FILTER_BRIGHTNESS, -50);
+		return $im;
+	}
+	public function summer($im,$val) {
+		imagefilter($im, IMG_FILTER_COLORIZE, 0, 150, 0, 50);
+		imagefilter($im, IMG_FILTER_NEGATE);
+		imagefilter($im, IMG_FILTER_COLORIZE, 25, 50, 0, 50);
+		imagefilter($im, IMG_FILTER_NEGATE);
+		return $im;
+	}
+	public function retro($im,$val) {
+		imagefilter($im, IMG_FILTER_GRAYSCALE);
+		imagefilter($im, IMG_FILTER_COLORIZE, 100, 25, 25, 50);
+		return $im;
+	}
+	public function country($im,$val) {
+		imagefilter($im, IMG_FILTER_BRIGHTNESS, -30);
+		imagefilter($im, IMG_FILTER_COLORIZE, 50, 50, 50, 50);
+		imagegammacorrect($im, 1, 0.3);
+		return $im;
+	}
+	public function washed($im,$val) {
+		imagefilter($im, IMG_FILTER_BRIGHTNESS, 30);
+		imagefilter($im, IMG_FILTER_NEGATE);
+		imagefilter($im, IMG_FILTER_COLORIZE, -50, 0, 20, 50);
+		imagefilter($im, IMG_FILTER_NEGATE );
+		imagefilter($im, IMG_FILTER_BRIGHTNESS, 10);
+		imagegammacorrect($im, 1, 1.2);
+		return $im;
+	}
+
+	public function pixelate($im,$val) {
+		if($val==null) $val = 10;
+		imagefilter($im,IMG_FILTER_PIXELATE,$val);
+		return $im;
+	}
+
+	public function blur($im,$blurFactor)
+	{
+		if(!$blurFactor)
+			$blurFactor = 3;
+		if($blurFactor>6)
+			$blurFactor = 6;
+		else if($blurFactor<0)
+			$blurFactor = 0;
+	  // blurFactor has to be an integer
+	  $blurFactor = round($blurFactor);
+	  
+	  $originalWidth = imagesx($im);
+	  $originalHeight = imagesy($im);
+	
+	  $smallestWidth = ceil($originalWidth * pow(0.5, $blurFactor));
+	  $smallestHeight = ceil($originalHeight * pow(0.5, $blurFactor));
+	
+	  // for the first run, the previous image is the original input
+	  $prevImage = $im;
+	  $prevWidth = $originalWidth;
+	  $prevHeight = $originalHeight;
+	
+	  // scale way down and gradually scale back up, blurring all the way
+	  for($i = 0; $i < $blurFactor; $i += 1)
+	  {    
+	    // determine dimensions of next image
+	    $nextWidth = $smallestWidth * pow(2, $i);
+	    $nextHeight = $smallestHeight * pow(2, $i);
+	
+	    // resize previous image to next size
+	    $nextImage = imagecreatetruecolor($nextWidth, $nextHeight);
+	    imagecopyresized($nextImage, $prevImage, 0, 0, 0, 0, 
+	      $nextWidth, $nextHeight, $prevWidth, $prevHeight);
+	
+	    // apply blur filter
+	    imagefilter($nextImage, IMG_FILTER_GAUSSIAN_BLUR);
+	
+	    // now the new image becomes the previous image for the next step
+	    $prevImage = $nextImage;
+	    $prevWidth = $nextWidth;
+	      $prevHeight = $nextHeight;
+	  }
+	
+	  // scale back to original size and blur one more time
+	  imagecopyresized($im, $nextImage, 
+	    0, 0, 0, 0, $originalWidth, $originalHeight, $nextWidth, $nextHeight);
+	  imagefilter($im, IMG_FILTER_GAUSSIAN_BLUR);
+	
+	  // clean up
+	  imagedestroy($prevImage);
+	
+	  // return result
+	  return $im;
+	}
+}
\ No newline at end of file
diff --git a/content-controllers/image/image.controller.php b/content-controllers/image/image.controller.php
index d1c3351..bec053c 100644
--- a/content-controllers/image/image.controller.php
+++ b/content-controllers/image/image.controller.php
@@ -64,13 +64,30 @@ class ImageController implements ContentController
         //don't do this if it's a gif because PHP can't handle animated gifs
         if($type!='gif')
         {
+            $filters = getFilters();
             foreach($url as $u)
             {
                 if(isSize($u))
                     $modifiers['size'] = $u;
                 else if(isRotation($u))
                     $modifiers['rotation'] = $u;
+                else // check for filters
+                {
+                    foreach($filters as $filter)
+                    {
+                        if(startsWith($u,$filter) && ($u==$filter || startsWith($u,$filter.'_')))
+                        {
+                            $a = explode('_',$u);
+                            $value = $a[1];
+                            if(is_numeric($value))
+                                $modifiers['filters'][] = array('filter'=>$filter,'value'=>$value);
+                            else
+                                $modifiers['filters'][] = array('filter'=>$filter);
+                        }
+                    }
+                }
             }
+
             if(in_array('webp',$url) && $type!='webp')
                 $modifiers['webp'] = true;
             if(in_array('forcesize',$url) && $modifiers['size'])
@@ -91,6 +108,7 @@ class ImageController implements ContentController
             $modhash = md5(http_build_query($modifiers,'',','));
             $newpath = ROOT.DS.'data'.DS.$hash.DS.$modhash.'_'.$hash;
             $im = $this->getObjOfImage($path);
+            $f = new Filter();
 
             if(!file_exists($newpath))
             {
@@ -98,6 +116,15 @@ class ImageController implements ContentController
                 {
                     switch($mod)
                     {
+                        case 'filters':
+                            foreach($val as $fd)
+                            {
+                                $filter = $fd['filter'];
+                                $value = $fd['value'];
+                                $im = $f->$filter($im,$value);
+                            }
+                        break;
+
                         case 'size':
                             ($modifiers['forcesize']?forceResize($im,$val):resize($im,$val));
                         break;