From fa6813d601f877ae692bdb1a0da68a04152a3061 Mon Sep 17 00:00:00 2001
From: Bharat Mediratta <bharat@menalto.com>
Date: Thu, 18 Nov 2010 19:31:22 -0800
Subject: [PATCH] Copied from 3.1/modules/rectangle_thumbs

---
 .../helpers/rectangle_thumbs_graphics.php     | 72 +++++++++++++++++++
 .../helpers/rectangle_thumbs_installer.php    | 29 ++++++++
 3.0/modules/rectangle_thumbs/module.info      |  3 +
 3 files changed, 104 insertions(+)
 create mode 100644 3.0/modules/rectangle_thumbs/helpers/rectangle_thumbs_graphics.php
 create mode 100644 3.0/modules/rectangle_thumbs/helpers/rectangle_thumbs_installer.php
 create mode 100644 3.0/modules/rectangle_thumbs/module.info

diff --git a/3.0/modules/rectangle_thumbs/helpers/rectangle_thumbs_graphics.php b/3.0/modules/rectangle_thumbs/helpers/rectangle_thumbs_graphics.php
new file mode 100644
index 00000000..9334972c
--- /dev/null
+++ b/3.0/modules/rectangle_thumbs/helpers/rectangle_thumbs_graphics.php
@@ -0,0 +1,72 @@
+<?php defined("SYSPATH") or die("No direct script access.");
+/**
+ * Gallery - a web based photo album viewer and editor
+ * Copyright (C) 2000-2010 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 rectangle_thumbs_graphics_Core {
+  /**
+   * Crop the input image so that it matches the aspect ratio specified in the
+   * rectangle_thumbs.aspect_ratio module setting.  Focus on the center of the image and crop out
+   * the biggest piece that we can.
+   *
+   * @param string     $input_file
+   * @param string     $output_file
+   * @param array      $options
+   */
+  static function crop_to_aspect_ratio($input_file, $output_file, $options) {
+    graphics::init_toolkit();
+
+    if (@filesize($input_file) == 0) {
+      throw new Exception("@todo EMPTY_INPUT_FILE");
+    }
+
+    list ($desired_width, $desired_height) =
+      explode(":", module::get_var("rectangle_thumbs", "aspect_ratio"));
+    $desired_ratio = $desired_width / $desired_height;
+
+    // Crop the largest rectangular section we can out of the original image.  Start with a
+    // rectangular section that's guaranteed to be too large, then shrink it horizontally to just
+    // barely fit.  If it's still too tall vertically, shrink both dimensions proportionally until
+    // the horizontal edge fits as well.
+    $dims = getimagesize($input_file);
+    if ($desired_ratio == 1) {
+      $new_width = $new_height = min($dims[0], $dims[1]);
+    } else if ($desired_ratio < 1) {
+      list ($new_width, $new_height) = array($dims[0], $dims[0] / $desired_ratio);
+    } else {
+      list ($new_width, $new_height) = array($dims[1] * $desired_ratio, $dims[1]);
+    }
+
+    if ($new_width > $dims[0]) {
+      // Too wide, scale it down
+      list ($new_width, $new_height) = array($dims[0], $dims[0] / $desired_ratio);
+    }
+
+    if ($new_height > $dims[1]) {
+      // Too tall, scale it down some more
+      $new_width = min($dims[0], $dims[1] * $desired_ratio);
+      $new_height = $new_width / $desired_ratio;
+    }
+    $new_width = round($new_width);
+    $new_height = round($new_height);
+
+    Image::factory($input_file)
+      ->crop($new_width, $new_height)
+      ->quality(module::get_var("gallery", "image_quality"))
+      ->save($output_file);
+  }
+}
diff --git a/3.0/modules/rectangle_thumbs/helpers/rectangle_thumbs_installer.php b/3.0/modules/rectangle_thumbs/helpers/rectangle_thumbs_installer.php
new file mode 100644
index 00000000..1fc6815c
--- /dev/null
+++ b/3.0/modules/rectangle_thumbs/helpers/rectangle_thumbs_installer.php
@@ -0,0 +1,29 @@
+<?php defined("SYSPATH") or die("No direct script access.");
+/**
+ * Gallery - a web based photo album viewer and editor
+ * Copyright (C) 2000-2010 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 rectangle_thumbs_installer {
+  static function install() {
+    // Insert a rule into the thumbnail generation pipeline that converts the source image to the
+    // right aspect ratio such that when we resize it down, it comes out to the right dimensions.
+    graphics::add_rule(
+      "rectangle_thumbs", "thumb", "rectangle_thumbs_graphics::crop_to_aspect_ratio", array(), 50);
+    module::set_var("rectangle_thumbs", "aspect_ratio", "3:1");
+    module::set_version("rectangle_thumbs", 1);
+  }
+}
diff --git a/3.0/modules/rectangle_thumbs/module.info b/3.0/modules/rectangle_thumbs/module.info
new file mode 100644
index 00000000..dd132506
--- /dev/null
+++ b/3.0/modules/rectangle_thumbs/module.info
@@ -0,0 +1,3 @@
+name = "Rectangle Thumbnails"
+description = "Force all thumbnails to be a specific rectangular aspect ratio"
+version = 1