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<?php
/**
* Laconica, the distributed open-source microblogging tool
*
* Abstraction for an image file
*
* PHP version 5
*
* LICENCE: 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/>.
*
* @category Image
* @package Laconica
* @author Evan Prodromou <evan@controlyourself.ca>
* @author Zach Copley <zach@controlyourself.ca>
* @copyright 2008-2009 Control Yourself, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link http://laconi.ca/
*/
if (!defined('LACONICA')) {
exit(1);
}
/**
* A wrapper on uploaded files
*
* Makes it slightly easier to accept an image file from upload.
*
* @category Image
* @package Laconica
* @author Evan Prodromou <evan@controlyourself.ca>
* @author Zach Copley <zach@controlyourself.ca>
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link http://laconi.ca/
*/
class ImageFile
{
var $id;
var $filepath;
var $barename;
var $type;
var $height;
var $width;
function __construct($id=null, $filepath=null, $type=null, $width=null, $height=null)
{
$this->id = $id;
$this->filepath = $filepath;
$info = @getimagesize($this->filepath);
$this->type = ($info) ? $info[2]:$type;
$this->width = ($info) ? $info[0]:$width;
$this->height = ($info) ? $info[1]:$height;
}
static function fromUpload($param='upload')
{
switch ($_FILES[$param]['error']) {
case UPLOAD_ERR_OK: // success, jump out
break;
case UPLOAD_ERR_INI_SIZE:
case UPLOAD_ERR_FORM_SIZE:
throw new Exception(sprintf(_('That file is too big. The maximum file size is %d.'), $this->maxFileSize()));
return;
case UPLOAD_ERR_PARTIAL:
@unlink($_FILES[$param]['tmp_name']);
throw new Exception(_('Partial upload.'));
return;
default:
throw new Exception(_('System error uploading file.'));
return;
}
$info = @getimagesize($_FILES[$param]['tmp_name']);
if (!$info) {
@unlink($_FILES[$param]['tmp_name']);
throw new Exception(_('Not an image or corrupt file.'));
return;
}
if ($info[2] !== IMAGETYPE_GIF &&
$info[2] !== IMAGETYPE_JPEG &&
$info[2] !== IMAGETYPE_PNG) {
@unlink($_FILES[$param]['tmp_name']);
throw new Exception(_('Unsupported image file format.'));
return;
}
return new ImageFile(null, $_FILES[$param]['tmp_name']);
}
function resize($size, $x = 0, $y = 0, $w = null, $h = null)
{
$w = ($w === null) ? $this->width:$w;
$h = ($h === null) ? $this->height:$h;
if (!file_exists($this->filepath)) {
throw new Exception(_('Lost our file.'));
return;
}
// Don't crop/scale if it isn't necessary
if ($size === $this->width
&& $size === $this->height
&& $x === 0
&& $y === 0
&& $w === $this->width
&& $h === $this->height) {
$outname = Avatar::filename($this->id,
image_type_to_extension($this->type),
$size,
common_timestamp());
$outpath = Avatar::path($outname);
@copy($this->filepath, $outpath);
return $outname;
}
switch ($this->type) {
case IMAGETYPE_GIF:
$image_src = imagecreatefromgif($this->filepath);
break;
case IMAGETYPE_JPEG:
$image_src = imagecreatefromjpeg($this->filepath);
break;
case IMAGETYPE_PNG:
$image_src = imagecreatefrompng($this->filepath);
break;
default:
throw new Exception(_('Unknown file type'));
return;
}
$image_dest = imagecreatetruecolor($size, $size);
if ($this->type == IMAGETYPE_GIF || $this->type == IMAGETYPE_PNG) {
$transparent_idx = imagecolortransparent($image_src);
if ($transparent_idx >= 0) {
$transparent_color = imagecolorsforindex($image_src, $transparent_idx);
$transparent_idx = imagecolorallocate($image_dest, $transparent_color['red'], $transparent_color['green'], $transparent_color['blue']);
imagefill($image_dest, 0, 0, $transparent_idx);
imagecolortransparent($image_dest, $transparent_idx);
} elseif ($this->type == IMAGETYPE_PNG) {
imagealphablending($image_dest, false);
$transparent = imagecolorallocatealpha($image_dest, 0, 0, 0, 127);
imagefill($image_dest, 0, 0, $transparent);
imagesavealpha($image_dest, true);
}
}
imagecopyresampled($image_dest, $image_src, 0, 0, $x, $y, $size, $size, $w, $h);
$outname = Avatar::filename($this->id,
image_type_to_extension($this->type),
$size,
common_timestamp());
$outpath = Avatar::path($outname);
switch ($this->type) {
case IMAGETYPE_GIF:
imagegif($image_dest, $outpath);
break;
case IMAGETYPE_JPEG:
imagejpeg($image_dest, $outpath, 100);
break;
case IMAGETYPE_PNG:
imagepng($image_dest, $outpath);
break;
default:
throw new Exception(_('Unknown file type'));
return;
}
imagedestroy($image_src);
imagedestroy($image_dest);
return $outname;
}
function unlink()
{
@unlink($this->filename);
}
static function maxFileSize()
{
$value = ImageFile::maxFileSizeInt();
if ($value > 1024 * 1024) {
return ($value/(1024*1024)).'Mb';
} else if ($value > 1024) {
return ($value/(1024)).'kB';
} else {
return $value;
}
}
static function maxFileSizeInt()
{
return min(ImageFile::strToInt(ini_get('post_max_size')),
ImageFile::strToInt(ini_get('upload_max_filesize')),
ImageFile::strToInt(ini_get('memory_limit')));
}
static function strToInt($str)
{
$unit = substr($str, -1);
$num = substr($str, 0, -1);
switch(strtoupper($unit)){
case 'G':
$num *= 1024;
case 'M':
$num *= 1024;
case 'K':
$num *= 1024;
}
return $num;
}
}
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