Initial commit

site/OFF_plugins/imagekit/lib/optimizer/optipng.php

@@ -0,0 +1,64 @@
+<?php
+
+namespace Kirby\Plugins\ImageKit\Optimizer;
+
+
+/**
+ * Lossless optimization of PNG images using `optipng`.
+ *
+ * See: http://optipng.sourceforge.net/
+ * and: http://optipng.sourceforge.net/pngtech/optipng.html
+ */
+class OptiPNG extends Base {
+
+  public static $selector    = ['image/png'];
+  public $priority           = [false, 50];
+
+  protected $targetFile;
+  protected $tmpFile;
+  
+
+  public static function defaults() {
+    return [
+      'imagekit.optipng.bin'   => null,
+      'imagekit.optipng.level' => 2,
+      'imagekit.optipng.strip' => 'all',
+      'imagekit.optipng.flags' => '',
+    ];
+  }
+
+  public static function available() {
+    return !empty(static::$kirby->option('imagekit.optipng.bin'));
+  }
+
+  public function post() {
+
+    $command = [];
+
+    $command[] = static::$kirby->option('imagekit.optipng.bin');    
+
+    // Optimization Level
+    $level = $this->option('imagekit.optipng.level');
+    if($level !== false) { // Level can be 0, so strict comparison is neccessary
+      $command[] = "-o$level";
+    }
+
+    // Should we strip Metadata?
+    if($strip = $this->option('imagekit.optipng.strip')) {
+      $command[] = "-strip $strip";
+    }
+
+    $flags = $this->option('imagekit.optipng.flags');
+    if(!empty($flags)) {
+      // Add exra flags, if defined by user.
+      $command[] = $flags;
+    }
+
+    // Set file to optimize
+    $command[] = '"' . $this->thumb->destination->root . '"';
+    
+    exec(implode(' ', $command));
+
+  }
+
+}