mcImagick kann jetzt thumbnail

file/class_mcImagick.inc.php

@@ -22,5 +22,85 @@ class mcImagick {
 		
 
 	}
+	/**
+	* Calculate new image dimensions to new constraints
+	*
+	* @param Original X size in pixels
+	* @param Original Y size in pixels
+	* @return New X maximum size in pixels
+	* @return New Y maximum size in pixels
+	 * http://php.net/manual/de/imagick.thumbnailimage.php
+	*/
+	private static function scaleImage($x,$y,$cx,$cy) {
+		//Set the default NEW values to be the old, in case it doesn't even need scaling
+		list($nx,$ny)=array($x,$y);
+
+		//If image is generally smaller, don't even bother
+		if ($x>=$cx || $y>=$cx) {
+
+			//Work out ratios
+			if ($x>0) $rx=$cx/$x;
+			if ($y>0) $ry=$cy/$y;
+
+			//Use the lowest ratio, to ensure we don't go over the wanted image size
+			if ($rx>$ry) {
+				$r=$ry;
+			} else {
+				$r=$rx;
+			}
+
+			//Calculate the new size based on the chosen ratio
+			$nx=intval($x*$r);
+			$ny=intval($y*$r);
+		}   
+
+		//Return the results
+		return array($nx,$ny);
+	}	
+	public static function makeThumbnail($param_original_filepath, $param_thumbnail_filepath, $param_maximumWidth=100, $param_maximumHeight=100) {
+
+		if(file_exists($param_original_filepath)) {
+			//Read original image and create Imagick object
+			try { 
+				$thumb=new Imagick($param_original_filepath);
+			} catch (Exception $e) {
+				D::li('Exception abgefangen: '.  $e->getMessage());
+				return false;
+			}				
+
+			try {
+				//Work out new dimensions
+				list($newX,$newY)=mcImagick::scaleImage(
+						$thumb->getImageWidth(),
+						$thumb->getImageHeight(),
+						$param_maximumWidth,
+						$param_maximumHeight);
+
+				//Scale the image
+				$thumb->thumbnailImage($newX,$newY);				
+			} catch (Exception $e) {
+				D::li('Exception abgefangen: '.  $e->getMessage());
+				return false;
+			}				
+
+			$create = mcDir::create(dirname($param_thumbnail_filepath));
+
+			//Write the new image to a file
+			try {
+				$thumb->writeImage($param_thumbnail_filepath);			
+			} catch (Exception $e) {
+				D::li('Exception abgefangen: '.  $e->getMessage());
+				return false;
+			}
+			
+			if(file_exists($param_thumbnail_filepath)) {
+				return true;
+			} else {
+				return false;
+			}
+		} else {
+			return false;
+		}
+	}
 }
 	
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