73 lines
2.8 KiB
PHP
73 lines
2.8 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) 2000-2013 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 rectangle_thumbs_graphics_Core {
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/**
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* Crop the input image so that it matches the aspect ratio specified in the
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* rectangle_thumbs.aspect_ratio module setting. Focus on the center of the image and crop out
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* the biggest piece that we can.
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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 $options
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*/
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static function crop_to_aspect_ratio($input_file, $output_file, $options) {
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graphics::init_toolkit();
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if (@filesize($input_file) == 0) {
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throw new Exception("@todo EMPTY_INPUT_FILE");
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}
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list ($desired_width, $desired_height) =
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explode(":", module::get_var("rectangle_thumbs", "aspect_ratio"));
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$desired_ratio = $desired_width / $desired_height;
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// Crop the largest rectangular section we can out of the original image. Start with a
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// rectangular section that's guaranteed to be too large, then shrink it horizontally to just
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// barely fit. If it's still too tall vertically, shrink both dimensions proportionally until
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// the horizontal edge fits as well.
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$dims = getimagesize($input_file);
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if ($desired_ratio == 1) {
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$new_width = $new_height = min($dims[0], $dims[1]);
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} else if ($desired_ratio < 1) {
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list ($new_width, $new_height) = array($dims[0], $dims[0] / $desired_ratio);
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} else {
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list ($new_width, $new_height) = array($dims[1] * $desired_ratio, $dims[1]);
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}
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if ($new_width > $dims[0]) {
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// Too wide, scale it down
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list ($new_width, $new_height) = array($dims[0], $dims[0] / $desired_ratio);
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}
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if ($new_height > $dims[1]) {
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// Too tall, scale it down some more
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$new_width = min($dims[0], $dims[1] * $desired_ratio);
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$new_height = $new_width / $desired_ratio;
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}
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$new_width = round($new_width);
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$new_height = round($new_height);
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Image::factory($input_file)
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->crop($new_width, $new_height)
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->quality(module::get_var("gallery", "image_quality"))
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->save($output_file);
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}
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}
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