d6e0640251
check if the relevant image handling function exists when deciding if the image type is supported
382 lines
13 KiB
PHP
382 lines
13 KiB
PHP
<?php
|
|
/**
|
|
* StatusNet, 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 StatusNet
|
|
* @author Evan Prodromou <evan@status.net>
|
|
* @author Zach Copley <zach@status.net>
|
|
* @copyright 2008-2009 StatusNet, Inc.
|
|
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
|
|
* @link http://status.net/
|
|
*/
|
|
|
|
if (!defined('STATUSNET') && !defined('LACONICA')) {
|
|
exit(1);
|
|
}
|
|
|
|
/**
|
|
* A wrapper on uploaded files
|
|
*
|
|
* Makes it slightly easier to accept an image file from upload.
|
|
*
|
|
* @category Image
|
|
* @package StatusNet
|
|
* @author Evan Prodromou <evan@status.net>
|
|
* @author Zach Copley <zach@status.net>
|
|
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
|
|
* @link http://status.net/
|
|
*/
|
|
|
|
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);
|
|
|
|
if (!(
|
|
($info[2] == IMAGETYPE_GIF && function_exists('imagecreatefromgif')) ||
|
|
($info[2] == IMAGETYPE_JPEG && function_exists('imagecreatefromjpeg')) ||
|
|
$info[2] == IMAGETYPE_BMP ||
|
|
($info[2] == IMAGETYPE_WBMP && function_exists('imagecreatefromwbmp')) ||
|
|
($info[2] == IMAGETYPE_XBM && function_exists('imagecreatefromxbm')) ||
|
|
($info[2] == IMAGETYPE_XPM && function_exists('imagecreatefromxpm')) ||
|
|
($info[2] == IMAGETYPE_PNG && function_exists('imagecreatefrompng')))) {
|
|
|
|
@unlink($_FILES[$param]['tmp_name']);
|
|
throw new Exception(_('Unsupported image file format.'));
|
|
return;
|
|
}
|
|
|
|
$this->type = ($info) ? $info[2]:$type;
|
|
$this->width = ($info) ? $info[0]:$width;
|
|
$this->height = ($info) ? $info[1]:$height;
|
|
}
|
|
|
|
static function fromUpload($param='upload')
|
|
{
|
|
switch ($_FILES[$param]['error']) {
|
|
case UPLOAD_ERR_OK: // success, jump out
|
|
break;
|
|
case UPLOAD_ERR_INI_SIZE:
|
|
case UPLOAD_ERR_FORM_SIZE:
|
|
throw new Exception(sprintf(_('That file is too big. The maximum file size is %s.'),
|
|
ImageFile::maxFileSize()));
|
|
return;
|
|
case UPLOAD_ERR_PARTIAL:
|
|
@unlink($_FILES[$param]['tmp_name']);
|
|
throw new Exception(_('Partial upload.'));
|
|
return;
|
|
case UPLOAD_ERR_NO_FILE:
|
|
// No file; probably just a non-AJAX submission.
|
|
return;
|
|
default:
|
|
common_log(LOG_ERR, __METHOD__ . ": Unknown upload error " .
|
|
$_FILES[$param]['error']);
|
|
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;
|
|
}
|
|
|
|
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;
|
|
case IMAGETYPE_BMP:
|
|
$image_src = imagecreatefrombmp($this->filepath);
|
|
break;
|
|
case IMAGETYPE_WBMP:
|
|
$image_src = imagecreatefromwbmp($this->filepath);
|
|
break;
|
|
case IMAGETYPE_XBM:
|
|
$image_src = imagecreatefromxbm($this->filepath);
|
|
break;
|
|
case IMAGETYPE_XPM:
|
|
$image_src = imagecreatefromxpm($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 || $this->type == IMAGETYPE_BMP) {
|
|
|
|
$transparent_idx = imagecolortransparent($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, $h);
|
|
|
|
if($this->type == IMAGETYPE_BMP) {
|
|
//we don't want to save BMP... it's an inefficient, rare, antiquated format
|
|
//save png instead
|
|
$this->type = IMAGETYPE_PNG;
|
|
} else if($this->type == IMAGETYPE_WBMP) {
|
|
//we don't want to save WBMP... it's a rare format that we can't guarantee clients will support
|
|
//save png instead
|
|
$this->type = IMAGETYPE_PNG;
|
|
} else if($this->type == IMAGETYPE_XBM) {
|
|
//we don't want to save XBM... it's a rare format that we can't guarantee clients will support
|
|
//save png instead
|
|
$this->type = IMAGETYPE_PNG;
|
|
} else if($this->type == IMAGETYPE_XPM) {
|
|
//we don't want to save XPM... it's a rare format that we can't guarantee clients will support
|
|
//save png instead
|
|
$this->type = IMAGETYPE_PNG;
|
|
}
|
|
|
|
$outname = Avatar::filename($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 $num;
|
|
}
|
|
}
|
|
|
|
//PHP doesn't (as of 2/24/2010) have an imagecreatefrombmp so conditionally define one
|
|
if(!function_exists('imagecreatefrombmp')){
|
|
//taken shamelessly from http://www.php.net/manual/en/function.imagecreatefromwbmp.php#86214
|
|
function imagecreatefrombmp($p_sFile)
|
|
{
|
|
// Load the image into a string
|
|
$file = fopen($p_sFile,"rb");
|
|
$read = fread($file,10);
|
|
while(!feof($file)&&($read<>""))
|
|
$read .= fread($file,1024);
|
|
|
|
$temp = unpack("H*",$read);
|
|
$hex = $temp[1];
|
|
$header = substr($hex,0,108);
|
|
|
|
// Process the header
|
|
// Structure: http://www.fastgraph.com/help/bmp_header_format.html
|
|
if (substr($header,0,4)=="424d")
|
|
{
|
|
// Cut it in parts of 2 bytes
|
|
$header_parts = str_split($header,2);
|
|
|
|
// Get the width 4 bytes
|
|
$width = hexdec($header_parts[19].$header_parts[18]);
|
|
|
|
// Get the height 4 bytes
|
|
$height = hexdec($header_parts[23].$header_parts[22]);
|
|
|
|
// Unset the header params
|
|
unset($header_parts);
|
|
}
|
|
|
|
// Define starting X and Y
|
|
$x = 0;
|
|
$y = 1;
|
|
|
|
// Create newimage
|
|
$image = imagecreatetruecolor($width,$height);
|
|
|
|
// Grab the body from the image
|
|
$body = substr($hex,108);
|
|
|
|
// Calculate if padding at the end-line is needed
|
|
// Divided by two to keep overview.
|
|
// 1 byte = 2 HEX-chars
|
|
$body_size = (strlen($body)/2);
|
|
$header_size = ($width*$height);
|
|
|
|
// Use end-line padding? Only when needed
|
|
$usePadding = ($body_size>($header_size*3)+4);
|
|
|
|
// Using a for-loop with index-calculation instaid of str_split to avoid large memory consumption
|
|
// Calculate the next DWORD-position in the body
|
|
for ($i=0;$i<$body_size;$i+=3)
|
|
{
|
|
// Calculate line-ending and padding
|
|
if ($x>=$width)
|
|
{
|
|
// If padding needed, ignore image-padding
|
|
// Shift i to the ending of the current 32-bit-block
|
|
if ($usePadding)
|
|
$i += $width%4;
|
|
|
|
// Reset horizontal position
|
|
$x = 0;
|
|
|
|
// Raise the height-position (bottom-up)
|
|
$y++;
|
|
|
|
// Reached the image-height? Break the for-loop
|
|
if ($y>$height)
|
|
break;
|
|
}
|
|
|
|
// Calculation of the RGB-pixel (defined as BGR in image-data)
|
|
// Define $i_pos as absolute position in the body
|
|
$i_pos = $i*2;
|
|
$r = hexdec($body[$i_pos+4].$body[$i_pos+5]);
|
|
$g = hexdec($body[$i_pos+2].$body[$i_pos+3]);
|
|
$b = hexdec($body[$i_pos].$body[$i_pos+1]);
|
|
|
|
// Calculate and draw the pixel
|
|
$color = imagecolorallocate($image,$r,$g,$b);
|
|
imagesetpixel($image,$x,$height-$y,$color);
|
|
|
|
// Raise the horizontal position
|
|
$x++;
|
|
}
|
|
|
|
// Unset the body / free the memory
|
|
unset($body);
|
|
|
|
// Return image-object
|
|
return $image;
|
|
}
|
|
}
|