<?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_PNG && function_exists('imagecreatefrompng')))) { 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; 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; } $outname = Avatar::filename($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; } }