1 files changed, 121 insertions, 0 deletions
diff --git a/core/helpers/graphics.php b/core/helpers/graphics.php
new file mode 100644
index 00000000..b38515fb
--- /dev/null
+++ b/core/helpers/graphics.php
@@ -0,0 +1,121 @@
+<?php defined("SYSPATH") or die("No direct script access.");
+/**
+ * Gallery - a web based photo album viewer and editor
+ * Copyright (C) 2000-2008 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 graphics_Core {
+  /**
+   * Add a new graphics rule.
+   *
+   * Rules are applied to targets (thumbnails and resizes) in priority order.  Rules are functions
+   * in the graphics class.  So for example, the following rule:
+   *
+   *   graphics::add_rule("core", "thumb", "resize", array(200, 200, Image::AUTO), 100);
+   *
+   * Specifies that "core" is adding a rule to resize thumbnails down to a max of 200px on
+   * the longest side.  The core module adds default rules at a priority of 100.  You can set
+   * higher and lower priorities to perform operations before or after this fires.
+   *
+   * @param string  $module_name the module that added the rule
+   * @param string  $target      the target for this operation ("thumb" or "resize")
+   * @param string  $operation   the name of the operation
+   * @param array   $args        arguments to the operation
+   * @param integer $priority    the priority for this function (lower priorities are run first)
+   */
+  public static function add_rule($module_name, $target, $operation, $args, $priority) {
+    $rule = ORM::factory("graphics_rule");
+    $rule->module_name = $module_name;
+    $rule->target = $target;
+    $rule->operation = $operation;
+    $rule->priority = $priority;
+    $rule->args = serialize($args);
+    $rule->save();
+  }
+
+  /**
+   * Remove all rules for this module
+   * @param string $module_name
+   */
+  public static function remove_rules($module_name) {
+    $db = Database::instance();
+    $db->query("DELETE FROM `graphics_rules` WHERE `module_name` = '$module_name'");
+  }
+
+  /**
+   * Rebuild the thumb and resize for the given item.
+   * @param Item_Model $item
+   */
+  public static function generate($item) {
+    if ($item->type == "album") {
+      $cover = $item->album_cover();
+      if (!$cover) {
+        return;
+      }
+      $input_file = $cover->file_path();
+    } else {
+      $input_file = $item->file_path();
+    }
+
+    $ops = array();
+    if ($item->thumb_dirty) {
+      $ops["thumb"] = $item->thumb_path();
+    }
+    if ($item->resize_dirty) {
+      $ops["resize"] = $item->resize_path();
+    }
+
+    if (!$ops) {
+      return;
+    }
+
+    foreach (array("thumb" => $item->thumb_path(),
+                   "resize" => $item->resize_path()) as $target => $output_file) {
+      foreach (ORM::factory("graphics_rule")
+               ->where("target", $target)
+               ->orderby("priority", "asc")
+               ->find_all() as $rule) {
+        $args = array_merge(array($input_file, $output_file), unserialize($rule->args));
+        call_user_func_array(array("graphics", $rule->operation), $args);
+      }
+    }
+
+    $dims = getimagesize($item->thumb_path());
+    $item->thumb_width = $dims[0];
+    $item->thumb_height = $dims[1];
+    $item->thumb_dirty = 0;
+
+    $dims = getimagesize($item->resize_path());
+    $item->resize_width = $dims[0];
+    $item->resize_height = $dims[1];
+    $item->resize_dirty = 0;
+    $item->save();
+  }
+
+  /**
+   * Wrapper around Image::resize
+   * @param string  $input_file
+   * @param string  $output_file
+   * @param integer $width
+   * @param integer $height
+   * @param integer $master Master Dimension constant from the Image class
+   */
+  public static function resize($input_file, $output_file, $width, $height, $master) {
+    Image::factory($input_file)
+      ->resize($width, $height, $master)
+      ->save($output_file);
+  }
+}