From e204e18b3c6a4b4b1aa76b6d4a5392bd238490eb Mon Sep 17 00:00:00 2001
From: Tim Almdal <tnalmdal@shaw.ca>
Date: Thu, 24 Sep 2009 20:28:26 -0700
Subject: Refactor the graphic rules processing to accomplish 2 goals: First
 separate the grapics library from module supplied rules and secondly, allow
 for modules to provide new processing rules callbacks.  graphics::generate
 will now look for <module_name>_graphics::<rule> methods.

---
 modules/watermark/helpers/watermark_graphics.php | 75 ++++++++++++++++++++++++
 1 file changed, 75 insertions(+)
 create mode 100644 modules/watermark/helpers/watermark_graphics.php

(limited to 'modules/watermark')

diff --git a/modules/watermark/helpers/watermark_graphics.php b/modules/watermark/helpers/watermark_graphics.php
new file mode 100644
index 00000000..aef7586b
--- /dev/null
+++ b/modules/watermark/helpers/watermark_graphics.php
@@ -0,0 +1,75 @@
+<?php defined("SYSPATH") or die("No direct script access.");
+/**
+ * Gallery - a web based photo album viewer and editor
+ * Copyright (C) 2000-2009 Bharat Mediratta
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+class watermark_graphics_Core {
+  /**
+   * Overlay an image on top of the input file.
+   *
+   * Valid options are: file, mime_type, position, transparency_percent, padding
+   *
+   * Valid positions: northwest, north, northeast,
+   *                  west, center, east,
+   *                  southwest, south, southeast
+   *
+   * padding is in pixels
+   *
+   * @param string     $input_file
+   * @param string     $output_file
+   * @param array      $options
+   */
+  static function composite($input_file, $output_file, $options) {
+    try {
+      graphics::init_toolkit();
+
+      module::event("graphics_composite", $input_file, $output_file, $options);
+
+      list ($width, $height) = getimagesize($input_file);
+      list ($w_width, $w_height) = getimagesize($options["file"]);
+
+      $pad = isset($options["padding"]) ? $options["padding"] : 10;
+      $top = $pad;
+      $left = $pad;
+      $y_center = max($height / 2 - $w_height / 2, $pad);
+      $x_center = max($width / 2 - $w_width / 2, $pad);
+      $bottom = max($height - $w_height - $pad, $pad);
+      $right = max($width - $w_width - $pad, $pad);
+
+      switch ($options["position"]) {
+      case "northwest": $x = $left;     $y = $top;       break;
+      case "north":     $x = $x_center; $y = $top;       break;
+      case "northeast": $x = $right;    $y = $top;       break;
+      case "west":      $x = $left;     $y = $y_center;  break;
+      case "center":    $x = $x_center; $y = $y_center;  break;
+      case "east":      $x = $right;    $y = $y_center;  break;
+      case "southwest": $x = $left;     $y = $bottom;    break;
+      case "south":     $x = $x_center; $y = $bottom;    break;
+      case "southeast": $x = $right;    $y = $bottom;    break;
+      }
+
+      Image::factory($input_file)
+        ->composite($options["file"], $x, $y, $options["transparency"])
+        ->quality(module::get_var("gallery", "image_quality"))
+        ->save($output_file);
+
+      module::event("graphics_composite_completed", $input_file, $output_file, $options);
+    } catch (ErrorException $e) {
+      Kohana::log("error", $e->get_message());
+    }
+  }
+}
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