mirror of
https://github.com/Pathduck/gallery3.git
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292 lines
9.5 KiB
PHP
292 lines
9.5 KiB
PHP
<?php defined("SYSPATH") or die("No direct script access.");
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/**
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* Gallery - a web based photo album viewer and editor
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* Copyright (C) 2000-2008 Bharat Mediratta
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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class graphics_Core {
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private static $init;
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/**
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* Add a new graphics rule.
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*
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* Rules are applied to targets (thumbnails and resizes) in priority order. Rules are functions
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* in the graphics class. So for example, the following rule:
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*
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* graphics::add_rule("core", "thumb", "resize",
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* array("width" => 200, "height" => 200, "master" => Image::AUTO), 100);
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*
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* Specifies that "core" is adding a rule to resize thumbnails down to a max of 200px on
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* the longest side. The core module adds default rules at a priority of 100. You can set
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* higher and lower priorities to perform operations before or after this fires.
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*
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* @param string $module_name the module that added the rule
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* @param string $target the target for this operation ("thumb" or "resize")
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* @param string $operation the name of the operation
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* @param array $args arguments to the operation
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* @param integer $priority the priority for this function (lower priorities are run first)
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*/
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public static function add_rule($module_name, $target, $operation, $args, $priority) {
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$rule = ORM::factory("graphics_rule");
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$rule->module_name = $module_name;
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$rule->target = $target;
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$rule->operation = $operation;
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$rule->priority = $priority;
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$rule->args = serialize($args);
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$rule->save();
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self::mark_all_dirty();
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}
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/**
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* Remove all rules for this module
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* @param string $module_name
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*/
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public static function remove_rules($module_name) {
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$db = Database::instance();
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$result = $db->query("DELETE FROM `graphics_rules` WHERE `module_name` = '$module_name'");
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if ($result->count()) {
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self::mark_all_dirty();
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}
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}
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/**
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* Rebuild the thumb and resize for the given item.
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* @param Item_Model $item
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*/
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public static function generate($item) {
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if ($item->type == "album") {
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$cover = $item->album_cover();
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if (!$cover) {
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return;
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}
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$input_file = $cover->file_path();
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} else {
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$input_file = $item->file_path();
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}
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$ops = array();
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if ($item->thumb_dirty) {
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$ops["thumb"] = $item->thumb_path();
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}
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if ($item->resize_dirty && $item->type != "album") {
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$ops["resize"] = $item->resize_path();
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}
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if (!$ops) {
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return;
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}
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foreach (array("thumb" => $item->thumb_path(),
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"resize" => $item->resize_path()) as $target => $output_file) {
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$working_file = $input_file;
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foreach (ORM::factory("graphics_rule")
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->where("target", $target)
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->orderby("priority", "asc")
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->find_all() as $rule) {
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$args = array($working_file, $output_file, unserialize($rule->args));
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call_user_func_array(array("graphics", $rule->operation), $args);
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$working_file = $output_file;
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}
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}
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if (!empty($ops["thumb"])) {
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$dims = getimagesize($item->thumb_path());
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$item->thumb_width = $dims[0];
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$item->thumb_height = $dims[1];
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$item->thumb_dirty = 0;
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}
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if (!empty($ops["resize"])) {
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$dims = getimagesize($item->resize_path());
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$item->resize_width = $dims[0];
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$item->resize_height = $dims[1];
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$item->resize_dirty = 0;
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}
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$item->save();
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}
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/**
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* Resize an image. Valid options are width, height and master. Master is one of the Image
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* master dimension constants.
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*
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* @param string $input_file
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* @param string $output_file
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* @param array $options
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*/
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public static function resize($input_file, $output_file, $options) {
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if (!self::$init) {
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self::init_toolkit();
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}
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Image::factory($input_file)
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->resize($options["width"], $options["height"], $options["master"])
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->save($output_file);
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}
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/**
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* Overlay an image on top of the input file. Valid options are file, mime_type, position and
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* transparency_percent.
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* position is one of northwest, north, northeast, west, center, east, southwest, south, southeast
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*
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* @param string $input_file
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* @param string $output_file
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* @param array $options
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*/
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public static function composite($input_file, $output_file, $options) {
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if (!self::$init) {
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self::init_toolkit();
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}
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list ($width, $height) = getimagesize($input_file);
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list ($w_width, $w_height) = getimagesize($options["file"]);
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$pad = 10;
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$top = $pad;
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$left = $pad;
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$y_center = max($height / 2 - $w_height / 2, $pad);
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$x_center = max($width / 2 - $w_width / 2, $pad);
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$bottom = max($height - $w_height - $pad, $pad);
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$right = max($width - $w_width - $pad, $pad);
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switch ($options["position"]) {
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case "northwest": $x = $left; $y = $top; break;
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case "north": $x = $x_center; $y = $top; break;
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case "northeast": $x = $right; $y = $top; break;
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case "west": $x = $left; $y = $y_center; break;
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case "center": $x = $x_center; $y = $y_center; break;
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case "east": $x = $right; $y = $y_center; break;
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case "southwest": $x = $left; $y = $bottom; break;
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case "south": $x = $x_center; $y = $bottom; break;
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case "southeast": $x = $right; $y = $bottom; break;
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}
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Image::factory($input_file)
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->composite($options["file"], $x, $y, $options["transparency"])
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->save($output_file);
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}
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/**
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* Return a query result that locates all items with dirty images.
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* @return Database_Result Query result
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*/
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public static function find_dirty_images_query() {
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return Database::instance()->query(
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"SELECT `id` FROM `items` " .
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"WHERE (`thumb_dirty` = 1 AND (`type` <> 'album' OR `right` - `left` > 1))" .
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" OR (`resize_dirty` = 1 AND `type` = 'photo')");
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}
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/**
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* Mark all thumbnails and resizes as dirty. They will have to be rebuilt.
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*/
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public static function mark_all_dirty() {
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$db = Database::instance();
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$db->query("UPDATE `items` SET `thumb_dirty` = 1, `resize_dirty` = 1");
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$count = self::find_dirty_images_query()->count();
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if ($count) {
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site_status::warning(
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sprintf(_("%d of your photos are out of date. %sClick here to fix them%s"),
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$count, "<a href=\"" .
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url::site("admin/maintenance/start/graphics::rebuild_dirty_images?csrf=__CSRF__") .
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"\" class=\"gDialogLink\">", "</a>"),
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"graphics_dirty");
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}
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}
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/**
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* Task that rebuilds all dirty images.
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* @param Task_Model the task
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*/
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public static function rebuild_dirty_images($task) {
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$db = Database::instance();
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$result = self::find_dirty_images_query();
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$remaining = $result->count();
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$completed = $task->get("completed", 0);
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$i = 0;
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foreach ($result as $row) {
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$item = ORM::factory("item", $row->id);
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if ($item->loaded) {
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self::generate($item);
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}
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$completed++;
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$remaining--;
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if ($i++ == 3) {
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break;
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}
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}
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$task->status = sprintf(
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_("Updated %d out of %d images"), $completed, $remaining + $completed);
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if ($completed + $remaining > 0) {
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$task->percent_complete = (int)(100 * $completed / ($completed + $remaining));
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} else {
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$task->percent_complete = 100;
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}
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$task->set("completed", $completed);
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if ($remaining == 0) {
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$task->done = true;
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$task->state = "success";
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site_status::clear("graphics_dirty");
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}
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}
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/**
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* Detect which graphics toolkits are available on this system. Return an array of key value
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* pairs where the key is one of gd, imagemagick, graphicsmagick and the value is information
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* about that toolkit. For GD we return the version string, and for ImageMagick and
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* GraphicsMagick we return the path to the directory containing the appropriate binaries.
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*/
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public static function detect_toolkits() {
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$gd_info = gd_info();
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return array("gd" => $gd_info["GD Version"],
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"imagemagick" => dirname(exec("which convert")),
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"graphicsmagick" => dirname(exec("which gm")));
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}
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/**
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* Choose which driver the Kohana Image library uses.
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*/
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public static function init_toolkit() {
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switch(module::get_var("core", "graphics_toolkit")) {
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case "gd":
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Kohana::config_set("image.driver", "GD");
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break;
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case "imagemagick":
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Kohana::config_set("image.driver", "ImageMagick");
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Kohana::config_set(
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"image.params.directory", module::get_var("core", "graphics_toolkit_path"));
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break;
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case "graphicsmagick":
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Kohana::config_set("image.driver", "GraphicsMagick");
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Kohana::config_set(
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"image.params.directory", module::get_var("core", "graphics_toolkit_path"));
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break;
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}
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self::$init = 1;
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}
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}
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