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<?php
/**
* @copyright Copyright (c) 2016 Julius Härtl <jus@bitgrid.net>
*
* @author Julius Härtl <jus@bitgrid.net>
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
namespace OCA\Theming;
use Imagick;
use ImagickPixel;
class IconBuilder {
/** @var ThemingDefaults */
private $themingDefaults;
/** @var Util */
private $util;
/**
* IconBuilder constructor.
*
* @param ThemingDefaults $themingDefaults
* @param Util $util
*/
public function __construct(
ThemingDefaults $themingDefaults,
Util $util
) {
$this->themingDefaults = $themingDefaults;
$this->util = $util;
}
/**
* @param $app app name
* @return string image blob
*/
public function getFavicon($app) {
$icon = $this->renderAppIcon($app);
$icon->resizeImage(32, 32, Imagick::FILTER_LANCZOS, 1);
$icon->setImageFormat("png24");
$data = $icon->getImageBlob();
$icon->destroy();
return $data;
}
/**
* @param $app app name
* @return string image blob
*/
public function getTouchIcon($app) {
$icon = $this->renderAppIcon($app);
$icon->setImageFormat("png24");
$data = $icon->getImageBlob();
$icon->destroy();
return $data;
}
/**
* Render app icon on themed background color
* fallback to logo
*
* @param $app app name
* @return Imagick
*/
public function renderAppIcon($app) {
$appIcon = $this->util->getAppIcon($app);
$color = $this->themingDefaults->getMailHeaderColor();
$mime = mime_content_type($appIcon);
// generate background image with rounded corners
$background = '<?xml version="1.0" encoding="UTF-8"?>' .
'<svg xmlns="http://www.w3.org/2000/svg" version="1.1" xmlns:cc="http://creativecommons.org/ns#" width="512" height="512" xmlns:xlink="http://www.w3.org/1999/xlink">' .
'<rect x="0" y="0" rx="75" ry="75" width="512" height="512" style="fill:' . $color . ';" />' .
'</svg>';
// resize svg magic as this seems broken in Imagemagick
if($mime === "image/svg+xml") {
$svg = file_get_contents($appIcon);
$tmp = new Imagick();
$tmp->readImageBlob($svg);
$x = $tmp->getImageWidth();
$y = $tmp->getImageHeight();
$res = $tmp->getImageResolution();
$tmp->destroy();
// convert svg to resized image
$appIconFile = new Imagick();
$resX = (int)(512 * $res['x'] / $x * 2.53);
$resY = (int)(512 * $res['y'] / $y * 2.53);
$appIconFile->setResolution($resX, $resY);
$appIconFile->setBackgroundColor(new ImagickPixel('transparent'));
$appIconFile->readImageBlob($svg);
} else {
$appIconFile = new Imagick();
$appIconFile->setBackgroundColor(new ImagickPixel('transparent'));
$appIconFile->readImageBlob(file_get_contents($appIcon));
$appIconFile->scaleImage(512, 512, true);
}
// offset for icon positioning
$border_w = (int)($appIconFile->getImageWidth() * 0.05);
$border_h = (int)($appIconFile->getImageHeight() * 0.05);
$innerWidth = (int)($appIconFile->getImageWidth() - $border_w * 2);
$innerHeight = (int)($appIconFile->getImageHeight() - $border_h * 2);
$appIconFile->adaptiveResizeImage($innerWidth, $innerHeight);
// center icon
$offset_w = 512 / 2 - $innerWidth / 2;
$offset_h = 512 / 2 - $innerHeight / 2;
$appIconFile->setImageFormat("png24");
$finalIconFile = new Imagick();
$finalIconFile->readImageBlob($background);
$finalIconFile->setImageVirtualPixelMethod(Imagick::VIRTUALPIXELMETHOD_TRANSPARENT);
$finalIconFile->setImageArtifact('compose:args', "1,0,-0.5,0.5");
$finalIconFile->compositeImage($appIconFile, Imagick::COMPOSITE_ATOP, $offset_w, $offset_h);
$finalIconFile->resizeImage(512, 512, Imagick::FILTER_LANCZOS, 1);
$appIconFile->destroy();
return $finalIconFile;
}
}
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