271 lines
6.4 KiB
PHP
271 lines
6.4 KiB
PHP
<?php
|
|
/**
|
|
* @copyright Copyright (C) 2010-2021, the Friendica project
|
|
*
|
|
* @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 <https://www.gnu.org/licenses/>.
|
|
*
|
|
*/
|
|
|
|
namespace Friendica\Util;
|
|
|
|
use Friendica\Core\Logger;
|
|
use Friendica\Core\System;
|
|
use Friendica\DI;
|
|
|
|
/**
|
|
* Image utilities
|
|
*/
|
|
class Images
|
|
{
|
|
/**
|
|
* Maps Mime types to Imagick formats
|
|
*
|
|
* @return array
|
|
*/
|
|
public static function getFormatsMap()
|
|
{
|
|
$m = [
|
|
'image/jpeg' => 'JPG',
|
|
'image/png' => 'PNG',
|
|
'image/gif' => 'GIF'
|
|
];
|
|
|
|
return $m;
|
|
}
|
|
|
|
/**
|
|
* Returns supported image mimetypes and corresponding file extensions
|
|
*
|
|
* @return array
|
|
*/
|
|
public static function supportedTypes()
|
|
{
|
|
$types = [
|
|
'image/jpeg' => 'jpg'
|
|
];
|
|
if (class_exists('Imagick')) {
|
|
// Imagick::queryFormats won't help us a lot there...
|
|
// At least, not yet, other parts of friendica uses this array
|
|
$types += [
|
|
'image/png' => 'png',
|
|
'image/gif' => 'gif'
|
|
];
|
|
} elseif (imagetypes() & IMG_PNG) {
|
|
$types += [
|
|
'image/png' => 'png'
|
|
];
|
|
}
|
|
|
|
return $types;
|
|
}
|
|
|
|
/**
|
|
* Fetch image mimetype from the image data or guessing from the file name
|
|
*
|
|
* @param string $image_data Image data
|
|
* @param string $filename File name (for guessing the type via the extension)
|
|
* @param string $mime default mime type
|
|
*
|
|
* @return string
|
|
* @throws \Exception
|
|
*/
|
|
public static function getMimeTypeByData(string $image_data, string $filename = '', string $mime = '')
|
|
{
|
|
if (substr($mime, 0, 6) == 'image/') {
|
|
Logger::info('Using default mime type', ['filename' => $filename, 'mime' => $mime]);
|
|
return $mime;
|
|
}
|
|
|
|
$image = @getimagesizefromstring($image_data);
|
|
if (!empty($image['mime'])) {
|
|
Logger::info('Mime type detected via data', ['filename' => $filename, 'default' => $mime, 'mime' => $image['mime']]);
|
|
return $image['mime'];
|
|
}
|
|
|
|
return self::guessTypeByExtension($filename);
|
|
}
|
|
|
|
/**
|
|
* Fetch image mimetype from the image data or guessing from the file name
|
|
*
|
|
* @param string $sourcefile Source file of the image
|
|
* @param string $filename File name (for guessing the type via the extension)
|
|
* @param string $mime default mime type
|
|
*
|
|
* @return string
|
|
* @throws \Exception
|
|
*/
|
|
public static function getMimeTypeBySource(string $sourcefile, string $filename = '', string $mime = '')
|
|
{
|
|
if (substr($mime, 0, 6) == 'image/') {
|
|
Logger::info('Using default mime type', ['filename' => $filename, 'mime' => $mime]);
|
|
return $mime;
|
|
}
|
|
|
|
$image = @getimagesize($sourcefile);
|
|
if (!empty($image['mime'])) {
|
|
Logger::info('Mime type detected via file', ['filename' => $filename, 'default' => $mime, 'image' => $image]);
|
|
return $image['mime'];
|
|
}
|
|
|
|
return self::guessTypeByExtension($filename);
|
|
}
|
|
|
|
/**
|
|
* Guess image mimetype from the filename
|
|
*
|
|
* @param string $filename Image filename
|
|
*
|
|
* @return string
|
|
* @throws \Exception
|
|
*/
|
|
public static function guessTypeByExtension(string $filename)
|
|
{
|
|
$ext = pathinfo(parse_url($filename, PHP_URL_PATH), PATHINFO_EXTENSION);
|
|
$types = self::supportedTypes();
|
|
$type = 'image/jpeg';
|
|
foreach ($types as $m => $e) {
|
|
if ($ext == $e) {
|
|
$type = $m;
|
|
}
|
|
}
|
|
|
|
Logger::info('Mime type guessed via extension', ['filename' => $filename, 'type' => $type]);
|
|
return $type;
|
|
}
|
|
|
|
/**
|
|
* @param string $url
|
|
* @return array
|
|
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
|
|
*/
|
|
public static function getInfoFromURLCached($url)
|
|
{
|
|
$data = [];
|
|
|
|
if (empty($url)) {
|
|
return $data;
|
|
}
|
|
|
|
$data = DI::cache()->get($url);
|
|
|
|
if (empty($data) || !is_array($data)) {
|
|
$data = self::getInfoFromURL($url);
|
|
|
|
DI::cache()->set($url, $data);
|
|
}
|
|
|
|
return $data;
|
|
}
|
|
|
|
/**
|
|
* @param string $url
|
|
* @return array
|
|
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
|
|
*/
|
|
public static function getInfoFromURL($url)
|
|
{
|
|
$data = [];
|
|
|
|
if (empty($url)) {
|
|
return $data;
|
|
}
|
|
|
|
$img_str = DI::httpRequest()->fetch($url, 4);
|
|
|
|
if (!$img_str) {
|
|
return [];
|
|
}
|
|
|
|
$filesize = strlen($img_str);
|
|
|
|
try {
|
|
if (function_exists("getimagesizefromstring")) {
|
|
$data = @getimagesizefromstring($img_str);
|
|
} else {
|
|
$tempfile = tempnam(get_temppath(), "cache");
|
|
|
|
$stamp1 = microtime(true);
|
|
file_put_contents($tempfile, $img_str);
|
|
DI::profiler()->saveTimestamp($stamp1, "file");
|
|
|
|
$data = getimagesize($tempfile);
|
|
unlink($tempfile);
|
|
}
|
|
} catch (\Exception $e) {
|
|
return [];
|
|
}
|
|
|
|
if ($data) {
|
|
$data['size'] = $filesize;
|
|
}
|
|
|
|
return $data;
|
|
}
|
|
|
|
/**
|
|
* @param integer $width
|
|
* @param integer $height
|
|
* @param integer $max
|
|
* @return array
|
|
*/
|
|
public static function getScalingDimensions($width, $height, $max)
|
|
{
|
|
if ((!$width) || (!$height)) {
|
|
return ['width' => 0, 'height' => 0];
|
|
}
|
|
|
|
if ($width > $max && $height > $max) {
|
|
// very tall image (greater than 16:9)
|
|
// constrain the width - let the height float.
|
|
|
|
if ((($height * 9) / 16) > $width) {
|
|
$dest_width = $max;
|
|
$dest_height = intval(($height * $max) / $width);
|
|
} elseif ($width > $height) {
|
|
// else constrain both dimensions
|
|
$dest_width = $max;
|
|
$dest_height = intval(($height * $max) / $width);
|
|
} else {
|
|
$dest_width = intval(($width * $max) / $height);
|
|
$dest_height = $max;
|
|
}
|
|
} else {
|
|
if ($width > $max) {
|
|
$dest_width = $max;
|
|
$dest_height = intval(($height * $max) / $width);
|
|
} else {
|
|
if ($height > $max) {
|
|
// very tall image (greater than 16:9)
|
|
// but width is OK - don't do anything
|
|
|
|
if ((($height * 9) / 16) > $width) {
|
|
$dest_width = $width;
|
|
$dest_height = $height;
|
|
} else {
|
|
$dest_width = intval(($width * $max) / $height);
|
|
$dest_height = $max;
|
|
}
|
|
} else {
|
|
$dest_width = $width;
|
|
$dest_height = $height;
|
|
}
|
|
}
|
|
}
|
|
|
|
return ['width' => $dest_width, 'height' => $dest_height];
|
|
}
|
|
}
|