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<?php defined("SYSPATH") or die("No direct script access.");
/**
* Gallery - a web based photo album viewer and editor
* Copyright (C) 2000-2011 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 gallery_graphics_Core {
/**
* Rotate an image. Valid options are degrees
*
* @param string $input_file
* @param string $output_file
* @param array $options
* @param Item_Model $item (optional)
*/
static function rotate($input_file, $output_file, $options, $item=null) {
graphics::init_toolkit();
module::event("graphics_rotate", $input_file, $output_file, $options, $item);
Image::factory($input_file)
->quality(module::get_var("gallery", "image_quality"))
->rotate($options["degrees"])
->save($output_file);
module::event("graphics_rotate_completed", $input_file, $output_file, $options, $item);
}
/**
* Resize an image. Valid options are width, height and master. Master is one of the Image
* master dimension constants.
*
* @param string $input_file
* @param string $output_file
* @param array $options
* @param Item_Model $item (optional)
*/
static function resize($input_file, $output_file, $options, $item=null) {
graphics::init_toolkit();
module::event("graphics_resize", $input_file, $output_file, $options, $item);
if (@filesize($input_file) == 0) {
throw new Exception("@todo EMPTY_INPUT_FILE");
}
$dims = getimagesize($input_file);
if (max($dims[0], $dims[1]) <= min($options["width"], $options["height"])) {
// Image would get upscaled; do nothing
copy($input_file, $output_file);
} else {
$image = Image::factory($input_file)
->resize($options["width"], $options["height"], $options["master"])
->quality(module::get_var("gallery", "image_quality"));
if (graphics::can("sharpen")) {
$image->sharpen(module::get_var("gallery", "image_sharpen"));
}
$image->save($output_file);
}
module::event("graphics_resize_completed", $input_file, $output_file, $options, $item);
}
/**
* Overlay an image on top of the input file.
*
* Valid options are: file, position, transparency, 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
* @param Item_Model $item (optional)
*/
static function composite($input_file, $output_file, $options, $item=null) {
try {
graphics::init_toolkit();
module::event("graphics_composite", $input_file, $output_file, $options, $item);
list ($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, $item);
} catch (ErrorException $e) {
Kohana_Log::add("error", $e->get_message());
}
}
}
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