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1 <?php 2 /*********************************************************************** 3 ** Title.........: Image Transformation Interface 4 ** Version.......: 1.0 5 ** Author........: Xiang Wei ZHUO <wei@zhuo.org> 6 ** Filename......: Transform.php 7 ** Last changed..: 30 Aug 2003 8 ** Notes.........: Orginal is from PEAR 9 10 Added a few extra, 11 - create unique filename in a particular directory, 12 used for temp image files. 13 - added cropping to GD, NetPBM, ImageMagick 14 **/ 15 16 // +----------------------------------------------------------------------+ 17 // | PHP Version 4 | 18 // +----------------------------------------------------------------------+ 19 // | Copyright (c) 1997-2002 The PHP Group | 20 // +----------------------------------------------------------------------+ 21 // | This source file is subject to version 2.02 of the PHP license, | 22 // | that is bundled with this package in the file LICENSE, and is | 23 // | available at through the world-wide-web at | 24 // | http://www.php.net/license/2_02.txt. | 25 // | If you did not receive a copy of the PHP license and are unable to | 26 // | obtain it through the world-wide-web, please send a note to | 27 // | license@php.net so we can mail you a copy immediately. | 28 // +----------------------------------------------------------------------+ 29 // | Authors: Peter Bowyer <peter@mapledesign.co.uk> | 30 // | Alan Knowles <alan@akbkhome.com> | 31 // | Vincent Oostindie <vincent@sunlight.tmfweb.nl> | 32 // +----------------------------------------------------------------------+ 33 // 34 // $Id: Transform.php 2114 2005-11-04 21:51:13Z wishy $ 35 // 36 // Image Transformation interface 37 // 38 39 40 /** 41 * The main "Image_Resize" class is a container and base class which 42 * provides the static methods for creating Image objects as well as 43 * some utility functions (maths) common to all parts of Image Resize. 44 * 45 * The object model of DB is as follows (indentation means inheritance): 46 * 47 * Image_Resize The base for each Image implementation. Provides default 48 * | implementations (in OO lingo virtual methods) for 49 * | the actual Image implementations as well as a bunch of 50 * | maths methods. 51 * | 52 * +-Image_GD The Image implementation for the PHP GD extension . Inherits 53 * Image_Resize 54 * When calling DB::setup for GD images the object returned is an 55 * instance of this class. 56 * 57 * @package Image Resize 58 * @version 1.00 59 * @author Peter Bowyer <peter@mapledesign.co.uk> 60 * @since PHP 4.0 61 */ 62 Class Image_Transform 63 { 64 /** 65 * Name of the image file 66 * @var string 67 */ 68 var $image = ''; 69 /** 70 * Type of the image file (eg. jpg, gif png ...) 71 * @var string 72 */ 73 var $type = ''; 74 /** 75 * Original image width in x direction 76 * @var int 77 */ 78 var $img_x = ''; 79 /** 80 * Original image width in y direction 81 * @var int 82 */ 83 var $img_y = ''; 84 /** 85 * New image width in x direction 86 * @var int 87 */ 88 var $new_x = ''; 89 /** 90 * New image width in y direction 91 * @var int 92 */ 93 var $new_y = ''; 94 /** 95 * Path the the library used 96 * e.g. /usr/local/ImageMagick/bin/ or 97 * /usr/local/netpbm/ 98 */ 99 var $lib_path = ''; 100 /** 101 * Flag to warn if image has been resized more than once before displaying 102 * or saving. 103 */ 104 var $resized = false; 105 106 107 var $uid = ''; 108 109 var $lapse_time =900; //15 mins 110 111 /** 112 * Create a new Image_resize object 113 * 114 * @param string $driver name of driver class to initialize 115 * 116 * @return mixed a newly created Image_Transform object, or a PEAR 117 * error object on error 118 * 119 * @see PEAR::isError() 120 * @see Image_Transform::setOption() 121 */ 122 function &factory($driver) 123 { 124 if ('' == $driver) { 125 die("No image library specified... aborting. You must call ::factory() with one parameter, the library to load."); 126 127 } 128 $this->uid = md5($_SERVER['REMOTE_ADDR']); 129 130 include_once "$driver.php"; 131 132 $classname = "Image_Transform_Driver_{$driver}"; 133 $obj =& new $classname; 134 return $obj; 135 } 136 137 138 /** 139 * Resize the Image in the X and/or Y direction 140 * If either is 0 it will be scaled proportionally 141 * 142 * @access public 143 * 144 * @param mixed $new_x (0, number, percentage 10% or 0.1) 145 * @param mixed $new_y (0, number, percentage 10% or 0.1) 146 * 147 * @return mixed none or PEAR_error 148 */ 149 function resize($new_x = 0, $new_y = 0) 150 { 151 // 0 means keep original size 152 $new_x = (0 == $new_x) ? $this->img_x : $this->_parse_size($new_x, $this->img_x); 153 $new_y = (0 == $new_y) ? $this->img_y : $this->_parse_size($new_y, $this->img_y); 154 // Now do the library specific resizing. 155 return $this->_resize($new_x, $new_y); 156 } // End resize 157 158 159 /** 160 * Scale the image to have the max x dimension specified. 161 * 162 * @param int $new_x Size to scale X-dimension to 163 * @return none 164 */ 165 function scaleMaxX($new_x) 166 { 167 $new_y = round(($new_x / $this->img_x) * $this->img_y, 0); 168 return $this->_resize($new_x, $new_y); 169 } // End resizeX 170 171 /** 172 * Scale the image to have the max y dimension specified. 173 * 174 * @access public 175 * @param int $new_y Size to scale Y-dimension to 176 * @return none 177 */ 178 function scaleMaxY($new_y) 179 { 180 $new_x = round(($new_y / $this->img_y) * $this->img_x, 0); 181 return $this->_resize($new_x, $new_y); 182 } // End resizeY 183 184 /** 185 * Scale Image to a maximum or percentage 186 * 187 * @access public 188 * @param mixed (number, percentage 10% or 0.1) 189 * @return mixed none or PEAR_error 190 */ 191 function scale($size) 192 { 193 if ((strlen($size) > 1) && (substr($size,-1) == '%')) { 194 return $this->scaleByPercentage(substr($size, 0, -1)); 195 } elseif ($size < 1) { 196 return $this->scaleByFactor($size); 197 } else { 198 return $this->scaleByLength($size); 199 } 200 } // End scale 201 202 /** 203 * Scales an image to a percentage of its original size. For example, if 204 * my image was 640x480 and I called scaleByPercentage(10) then the image 205 * would be resized to 64x48 206 * 207 * @access public 208 * @param int $size Percentage of original size to scale to 209 * @return none 210 */ 211 function scaleByPercentage($size) 212 { 213 return $this->scaleByFactor($size / 100); 214 } // End scaleByPercentage 215 216 /** 217 * Scales an image to a factor of its original size. For example, if 218 * my image was 640x480 and I called scaleByFactor(0.5) then the image 219 * would be resized to 320x240. 220 * 221 * @access public 222 * @param float $size Factor of original size to scale to 223 * @return none 224 */ 225 function scaleByFactor($size) 226 { 227 $new_x = round($size * $this->img_x, 0); 228 $new_y = round($size * $this->img_y, 0); 229 return $this->_resize($new_x, $new_y); 230 } // End scaleByFactor 231 232 /** 233 * Scales an image so that the longest side has this dimension. 234 * 235 * @access public 236 * @param int $size Max dimension in pixels 237 * @return none 238 */ 239 function scaleByLength($size) 240 { 241 if ($this->img_x >= $this->img_y) { 242 $new_x = $size; 243 $new_y = round(($new_x / $this->img_x) * $this->img_y, 0); 244 } else { 245 $new_y = $size; 246 $new_x = round(($new_y / $this->img_y) * $this->img_x, 0); 247 } 248 return $this->_resize($new_x, $new_y); 249 } // End scaleByLength 250 251 252 /** 253 * 254 * @access public 255 * @return void 256 */ 257 function _get_image_details($image) 258 { 259 //echo $image; 260 $data = @GetImageSize($image); 261 #1 = GIF, 2 = JPG, 3 = PNG, 4 = SWF, 5 = PSD, 6 = BMP, 7 = TIFF(intel byte order), 8 = TIFF(motorola byte order, 262 # 9 = JPC, 10 = JP2, 11 = JPX, 12 = JB2, 13 = SWC 263 if (is_array($data)){ 264 switch($data[2]){ 265 case 1: 266 $type = 'gif'; 267 break; 268 case 2: 269 $type = 'jpeg'; 270 break; 271 case 3: 272 $type = 'png'; 273 break; 274 case 4: 275 $type = 'swf'; 276 break; 277 case 5: 278 $type = 'psd'; 279 case 6: 280 $type = 'bmp'; 281 case 7: 282 case 8: 283 $type = 'tiff'; 284 default: 285 echo("We do not recognize this image format"); 286 } 287 $this->img_x = $data[0]; 288 $this->img_y = $data[1]; 289 $this->type = $type; 290 291 return true; 292 } else { 293 echo("Cannot fetch image or images details."); 294 return null; 295 } 296 /* 297 $output = array( 298 'width' => $data[0], 299 'height' => $data[1], 300 'type' => $type 301 ); 302 return $output; 303 */ 304 } 305 306 307 /** 308 * Parse input and convert 309 * If either is 0 it will be scaled proportionally 310 * 311 * @access private 312 * 313 * @param mixed $new_size (0, number, percentage 10% or 0.1) 314 * @param int $old_size 315 * 316 * @return mixed none or PEAR_error 317 */ 318 function _parse_size($new_size, $old_size) 319 { 320 if ('%' == $new_size) { 321 $new_size = str_replace('%','',$new_size); 322 $new_size = $new_size / 100; 323 } 324 if ($new_size > 1) { 325 return (int) $new_size; 326 } elseif ($new_size == 0) { 327 return (int) $old_size; 328 } else { 329 return (int) round($new_size * $old_size, 0); 330 } 331 } 332 333 334 function uniqueStr() 335 { 336 return substr(md5(microtime()),0,6); 337 } 338 339 //delete old tmp files, and allow only 1 file per remote host. 340 function cleanUp($id, $dir) 341 { 342 $d = dir($dir); 343 $id_length = strlen($id); 344 345 while (false !== ($entry = $d->read())) { 346 if (is_file($dir.'/'.$entry) && substr($entry,0,1) == '.' && !ereg($entry, $this->image)) 347 { 348 //echo filemtime($this->directory.'/'.$entry)."<br>"; 349 //echo time(); 350 351 if (filemtime($dir.'/'.$entry) + $this->lapse_time < time()) 352 unlink($dir.'/'.$entry); 353 354 if (substr($entry, 1, $id_length) == $id) 355 { 356 if (is_file($dir.'/'.$entry)) 357 unlink($dir.'/'.$entry); 358 } 359 } 360 } 361 $d->close(); 362 } 363 364 365 function createUnique($dir) 366 { 367 $unique_str = '.'.$this->uid.'_'.$this->uniqueStr().".".$this->type; 368 369 //make sure the the unique temp file does not exists 370 while (file_exists($dir.$unique_str)) 371 { 372 $unique_str = '.'.$this->uid.'_'.$this->uniqueStr().".".$this->type; 373 } 374 375 $this->cleanUp($this->uid, $dir); 376 377 return $unique_str; 378 } 379 380 381 /** 382 * Set the image width 383 * @param int $size dimension to set 384 * @since 29/05/02 13:36:31 385 * @return 386 */ 387 function _set_img_x($size) 388 { 389 $this->img_x = $size; 390 } 391 392 /** 393 * Set the image height 394 * @param int $size dimension to set 395 * @since 29/05/02 13:36:31 396 * @return 397 */ 398 function _set_img_y($size) 399 { 400 $this->img_y = $size; 401 } 402 403 /** 404 * Set the image width 405 * @param int $size dimension to set 406 * @since 29/05/02 13:36:31 407 * @return 408 */ 409 function _set_new_x($size) 410 { 411 $this->new_x = $size; 412 } 413 414 /** 415 * Set the image height 416 * @param int $size dimension to set 417 * @since 29/05/02 13:36:31 418 * @return 419 */ 420 function _set_new_y($size) 421 { 422 $this->new_y = $size; 423 } 424 425 /** 426 * Get the type of the image being manipulated 427 * 428 * @return string $this->type the image type 429 */ 430 function getImageType() 431 { 432 return $this->type; 433 } 434 435 /** 436 * 437 * @access public 438 * @return string web-safe image type 439 */ 440 function getWebSafeFormat() 441 { 442 switch($this->type){ 443 case 'gif': 444 return 'gif'; 445 break; 446 case 'png': 447 return 'png'; 448 break; 449 default: 450 return 'jpeg'; 451 } // switch 452 } 453 454 /** 455 * Place holder for the real resize method 456 * used by extended methods to do the resizing 457 * 458 * @access private 459 * @return PEAR_error 460 */ 461 function _resize() { 462 return null; //PEAR::raiseError("No Resize method exists", true); 463 } 464 465 /** 466 * Place holder for the real load method 467 * used by extended methods to do the resizing 468 * 469 * @access public 470 * @return PEAR_error 471 */ 472 function load($filename) { 473 return null; //PEAR::raiseError("No Load method exists", true); 474 } 475 476 /** 477 * Place holder for the real display method 478 * used by extended methods to do the resizing 479 * 480 * @access public 481 * @param string filename 482 * @return PEAR_error 483 */ 484 function display($type, $quality) { 485 return null; //PEAR::raiseError("No Display method exists", true); 486 } 487 488 /** 489 * Place holder for the real save method 490 * used by extended methods to do the resizing 491 * 492 * @access public 493 * @param string filename 494 * @return PEAR_error 495 */ 496 function save($filename, $type, $quality) { 497 return null; //PEAR::raiseError("No Save method exists", true); 498 } 499 500 /** 501 * Place holder for the real free method 502 * used by extended methods to do the resizing 503 * 504 * @access public 505 * @return PEAR_error 506 */ 507 function free() { 508 return null; //PEAR::raiseError("No Free method exists", true); 509 } 510 511 /** 512 * Reverse of rgb2colorname. 513 * 514 * @access public 515 * @return PEAR_error 516 * 517 * @see rgb2colorname 518 */ 519 function colorhex2colorarray($colorhex) { 520 $r = hexdec(substr($colorhex, 1, 2)); 521 $g = hexdec(substr($colorhex, 3, 2)); 522 $b = hexdec(substr($colorhex, 4, 2)); 523 return array($r,$g,$b); 524 } 525 526 /** 527 * Reverse of rgb2colorname. 528 * 529 * @access public 530 * @return PEAR_error 531 * 532 * @see rgb2colorname 533 */ 534 function colorarray2colorhex($color) { 535 $color = '#'.dechex($color[0]).dechex($color[1]).dechex($color[2]); 536 return strlen($color)>6?false:$color; 537 } 538 539 540 /* Methods to add to the driver classes in the future */ 541 function addText() 542 { 543 return null; //PEAR::raiseError("No addText method exists", true); 544 } 545 546 function addDropShadow() 547 { 548 return null; //PEAR::raiseError("No AddDropShadow method exists", true); 549 } 550 551 function addBorder() 552 { 553 return null; //PEAR::raiseError("No addBorder method exists", true); 554 } 555 556 function crop() 557 { 558 return null; //PEAR::raiseError("No crop method exists", true); 559 } 560 561 function flip() 562 { 563 return null; 564 } 565 566 function gamma() 567 { 568 return null; //PEAR::raiseError("No gamma method exists", true); 569 } 570 } 571 ?>
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