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Code source de eGroupWare 1.2.106-2 |
1 <?php 2 /*********************************************************************** 3 ** Title.........: GD Driver 4 ** Version.......: 1.0 5 ** Author........: Xiang Wei ZHUO <wei@zhuo.org> 6 ** Filename......: GD.php 7 ** Last changed..: 30 Aug 2003 8 ** Notes.........: Orginal is from PEAR 9 **/ 10 // +----------------------------------------------------------------------+ 11 // | PHP Version 4 | 12 // +----------------------------------------------------------------------+ 13 // | Copyright (c) 1997-2002 The PHP Group | 14 // +----------------------------------------------------------------------+ 15 // | This source file is subject to version 2.02 of the PHP license, | 16 // | that is bundled with this package in the file LICENSE, and is | 17 // | available at through the world-wide-web at | 18 // | http://www.php.net/license/2_02.txt. | 19 // | If you did not receive a copy of the PHP license and are unable to | 20 // | obtain it through the world-wide-web, please send a note to | 21 // | license@php.net so we can mail you a copy immediately. | 22 // +----------------------------------------------------------------------+ 23 // | Authors: Peter Bowyer <peter@mapledesign.co.uk> | 24 // | Alan Knowles <alan@akbkhome.com> | 25 // +----------------------------------------------------------------------+ 26 // 27 // Usage : 28 // $img = new Image_Transform_GD(); 29 // $angle = -78; 30 // $img->load('magick.png'); 31 // 32 // if($img->rotate($angle,array('autoresize'=>true,'color_mask'=>array(255,0,0)))){ 33 // $img->addText(array('text'=>"Rotation $angle",'x'=>0,'y'=>100,'font'=>'/usr/share/fonts/default/TrueType/cogb____.ttf')); 34 // $img->display(); 35 // } else { 36 // echo "Error"; 37 // } 38 // 39 // 40 // $Id: GD.php 15443 2004-06-15 00:27:03Z mipmip $ 41 // 42 // Image Transformation interface using the GD library 43 // 44 45 require_once "Transform.php"; 46 47 Class Image_Transform_Driver_GD extends Image_Transform 48 { 49 /** 50 * Holds the image file for manipulation 51 */ 52 var $imageHandle = ''; 53 54 /** 55 * Holds the original image file 56 */ 57 var $old_image = ''; 58 59 /** 60 * Check settings 61 * 62 * @return mixed true or or a PEAR error object on error 63 * 64 * @see PEAR::isError() 65 */ 66 function Image_Transform_GD() 67 { 68 return; 69 } // End function Image 70 71 /** 72 * Load image 73 * 74 * @param string filename 75 * 76 * @return mixed none or a PEAR error object on error 77 * @see PEAR::isError() 78 */ 79 function load($image) 80 { 81 $this->uid = md5($_SERVER['REMOTE_ADDR']); 82 $this->image = $image; 83 $this->_get_image_details($image); 84 $functionName = 'ImageCreateFrom' . $this->type; 85 $this->imageHandle = $functionName($this->image); 86 } // End load 87 88 /** 89 * addText 90 * 91 * @param array options Array contains options 92 * array( 93 * 'text' The string to draw 94 * 'x' Horizontal position 95 * 'y' Vertical Position 96 * 'Color' Font color 97 * 'font' Font to be used 98 * 'size' Size of the fonts in pixel 99 * 'resize_first' Tell if the image has to be resized 100 * before drawing the text 101 * ) 102 * 103 * @return none 104 * @see PEAR::isError() 105 */ 106 function addText($params) 107 { 108 $default_params = array( 109 'text' => 'This is Text', 110 'x' => 10, 111 'y' => 20, 112 'color' => array(255,0,0), 113 'font' => 'Arial.ttf', 114 'size' => '12', 115 'angle' => 0, 116 'resize_first' => false // Carry out the scaling of the image before annotation? Not used for GD 117 ); 118 $params = array_merge($default_params, $params); 119 extract($params); 120 121 if( !is_array($color) ){ 122 if ($color[0]=='#'){ 123 $this->colorhex2colorarray( $color ); 124 } else { 125 include_once('Image/Transform/Driver/ColorsDefs.php'); 126 $color = isset($colornames[$color])?$colornames[$color]:false; 127 } 128 } 129 130 $c = imagecolorresolve ($this->imageHandle, $color[0], $color[1], $color[2]); 131 132 if ('ttf' == substr($font, -3)) { 133 ImageTTFText($this->imageHandle, $size, $angle, $x, $y, $c, $font, $text); 134 } else { 135 ImagePSText($this->imageHandle, $size, $angle, $x, $y, $c, $font, $text); 136 } 137 return true; 138 } // End addText 139 140 141 /** 142 * Rotate image by the given angle 143 * Uses a fast rotation algorythm for custom angles 144 * or lines copy for multiple of 90 degrees 145 * 146 * @param int $angle Rotation angle 147 * @param array $options array( 'autoresize'=>true|false, 148 * 'color_mask'=>array(r,g,b), named color or #rrggbb 149 * ) 150 * @author Pierre-Alain Joye 151 * @return mixed none or a PEAR error object on error 152 * @see PEAR::isError() 153 */ 154 function rotate($angle, $options=null) 155 { 156 if(function_exists('imagerotate')) { 157 $white = imagecolorallocate ($this->imageHandle, 255, 255, 255); 158 $this->imageHandle = imagerotate($this->imageHandle, $angle, $white); 159 return true; 160 } 161 162 if ( $options==null ){ 163 $autoresize = true; 164 $color_mask = array(255,255,0); 165 } else { 166 extract( $options ); 167 } 168 169 while ($angle <= -45) { 170 $angle += 360; 171 } 172 while ($angle > 270) { 173 $angle -= 360; 174 } 175 176 $t = deg2rad($angle); 177 178 if( !is_array($color_mask) ){ 179 if ($color[0]=='#'){ 180 $this->colorhex2colorarray( $color_mask ); 181 } else { 182 include_once('Image/Transform/Driver/ColorDefs.php'); 183 $color = isset($colornames[$color_mask])?$colornames[$color_mask]:false; 184 } 185 } 186 187 // Do not round it, too much lost of quality 188 $cosT = cos($t); 189 $sinT = sin($t); 190 191 $img =& $this->imageHandle; 192 193 $width = $max_x = $this->img_x; 194 $height = $max_y = $this->img_y; 195 $min_y = 0; 196 $min_x = 0; 197 198 $x1 = round($max_x/2,0); 199 $y1 = round($max_y/2,0); 200 201 if ( $autoresize ){ 202 $t = abs($t); 203 $a = round($angle,0); 204 switch((int)($angle)){ 205 case 0: 206 $width2 = $width; 207 $height2 = $height; 208 break; 209 case 90: 210 $width2 = $height; 211 $height2 = $width; 212 break; 213 case 180: 214 $width2 = $width; 215 $height2 = $height; 216 break; 217 case 270: 218 $width2 = $height; 219 $height2 = $width; 220 break; 221 default: 222 $width2 = (int)(abs(sin($t) * $height + cos($t) * $width)); 223 $height2 = (int)(abs(cos($t) * $height+sin($t) * $width)); 224 } 225 226 $width2 -= $width2%2; 227 $height2 -= $height2%2; 228 229 $d_width = abs($width - $width2); 230 $d_height = abs($height - $height2); 231 $x_offset = $d_width/2; 232 $y_offset = $d_height/2; 233 $min_x2 = -abs($x_offset); 234 $min_y2 = -abs($y_offset); 235 $max_x2 = $width2; 236 $max_y2 = $height2; 237 } 238 239 $img2 = @imagecreate($width2,$height2); 240 241 if ( !is_resource($img2) ){ 242 return false;/*PEAR::raiseError('Cannot create buffer for the rotataion.', 243 null, PEAR_ERROR_TRIGGER, E_USER_NOTICE);*/ 244 } 245 246 $this->img_x = $width2; 247 $this->img_y = $height2; 248 249 250 imagepalettecopy($img2,$img); 251 252 $mask = imagecolorresolve($img2,$color_mask[0],$color_mask[1],$color_mask[2]); 253 254 // use simple lines copy for axes angles 255 switch((int)($angle)){ 256 case 0: 257 imagefill ($img2, 0, 0,$mask); 258 for ($y=0; $y < $max_y; $y++) { 259 for ($x = $min_x; $x < $max_x; $x++){ 260 $c = @imagecolorat ( $img, $x, $y); 261 imagesetpixel($img2,$x+$x_offset,$y+$y_offset,$c); 262 } 263 } 264 break; 265 case 90: 266 imagefill ($img2, 0, 0,$mask); 267 for ($x = $min_x; $x < $max_x; $x++){ 268 for ($y=$min_y; $y < $max_y; $y++) { 269 $c = imagecolorat ( $img, $x, $y); 270 imagesetpixel($img2,$max_y-$y-1,$x,$c); 271 } 272 } 273 break; 274 case 180: 275 imagefill ($img2, 0, 0,$mask); 276 for ($y=0; $y < $max_y; $y++) { 277 for ($x = $min_x; $x < $max_x; $x++){ 278 $c = @imagecolorat ( $img, $x, $y); 279 imagesetpixel($img2, $max_x2-$x-1, $max_y2-$y-1, $c); 280 } 281 } 282 break; 283 case 270: 284 imagefill ($img2, 0, 0,$mask); 285 for ($y=0; $y < $max_y; $y++) { 286 for ($x = $max_x; $x >= $min_x; $x--){ 287 $c = @imagecolorat ( $img, $x, $y); 288 imagesetpixel($img2,$y,$max_x-$x-1,$c); 289 } 290 } 291 break; 292 // simple reverse rotation algo 293 default: 294 $i=0; 295 for ($y = $min_y2; $y < $max_y2; $y++){ 296 297 // Algebra :) 298 $x2 = round((($min_x2-$x1) * $cosT) + (($y-$y1) * $sinT + $x1),0); 299 $y2 = round((($y-$y1) * $cosT - ($min_x2-$x1) * $sinT + $y1),0); 300 301 for ($x = $min_x2; $x < $max_x2; $x++){ 302 303 // Check if we are out of original bounces, if we are 304 // use the default color mask 305 if ( $x2>=0 && $x2<$max_x && $y2>=0 && $y2<$max_y ){ 306 $c = imagecolorat ( $img, $x2, $y2); 307 } else { 308 $c = $mask; 309 } 310 imagesetpixel($img2,$x+$x_offset,$y+$y_offset,$c); 311 312 // round verboten! 313 $x2 += $cosT; 314 $y2 -= $sinT; 315 } 316 } 317 break; 318 } 319 $this->old_image = $this->imageHandle; 320 $this->imageHandle = $img2; 321 return true; 322 } 323 324 325 /** 326 * Resize Action 327 * 328 * For GD 2.01+ the new copyresampled function is used 329 * It uses a bicubic interpolation algorithm to get far 330 * better result. 331 * 332 * @param $new_x int new width 333 * @param $new_y int new height 334 * 335 * @return true on success or pear error 336 * @see PEAR::isError() 337 */ 338 function _resize($new_x, $new_y) { 339 if ($this->resized === true) { 340 return false; /*PEAR::raiseError('You have already resized the image without saving it. Your previous resizing will be overwritten', null, PEAR_ERROR_TRIGGER, E_USER_NOTICE);*/ 341 } 342 if(function_exists('ImageCreateTrueColor')){ 343 $new_img =ImageCreateTrueColor($new_x,$new_y); 344 } else { 345 $new_img =ImageCreate($new_x,$new_y); 346 } 347 if(function_exists('ImageCopyResampled')){ 348 ImageCopyResampled($new_img, $this->imageHandle, 0, 0, 0, 0, $new_x, $new_y, $this->img_x, $this->img_y); 349 } else { 350 ImageCopyResized($new_img, $this->imageHandle, 0, 0, 0, 0, $new_x, $new_y, $this->img_x, $this->img_y); 351 } 352 $this->old_image = $this->imageHandle; 353 $this->imageHandle = $new_img; 354 $this->resized = true; 355 356 $this->new_x = $new_x; 357 $this->new_y = $new_y; 358 return true; 359 } 360 361 /** 362 * Crop the image 363 * 364 * @param int $crop_x left column of the image 365 * @param int $crop_y top row of the image 366 * @param int $crop_width new cropped image width 367 * @param int $crop_height new cropped image height 368 */ 369 function crop($new_x, $new_y, $new_width, $new_height) 370 { 371 if(function_exists('ImageCreateTrueColor')){ 372 $new_img =ImageCreateTrueColor($new_width,$new_height); 373 } else { 374 $new_img =ImageCreate($new_width,$new_height); 375 } 376 if(function_exists('ImageCopyResampled')){ 377 ImageCopyResampled($new_img, $this->imageHandle, 0, 0, $new_x, $new_y,$new_width,$new_height,$new_width,$new_height); 378 } else { 379 ImageCopyResized($new_img, $this->imageHandle, 0, 0, $new_x, $new_y, $new_width,$new_height,$new_width,$new_height); 380 } 381 $this->old_image = $this->imageHandle; 382 $this->imageHandle = $new_img; 383 $this->resized = true; 384 385 $this->new_x = $new_x; 386 $this->new_y = $new_y; 387 return true; 388 } 389 390 /** 391 * Flip the image horizontally or vertically 392 * 393 * @param boolean $horizontal true if horizontal flip, vertical otherwise 394 */ 395 function flip($horizontal) 396 { 397 if(!$horizontal) { 398 $this->rotate(180); 399 } 400 401 $width = imagesx($this->imageHandle); 402 $height = imagesy($this->imageHandle); 403 404 for ($j = 0; $j < $height; $j++) { 405 $left = 0; 406 $right = $width-1; 407 408 409 while ($left < $right) { 410 //echo " j:".$j." l:".$left." r:".$right."\n<br>"; 411 $t = imagecolorat($this->imageHandle, $left, $j); 412 imagesetpixel($this->imageHandle, $left, $j, imagecolorat($this->imageHandle, $right, $j)); 413 imagesetpixel($this->imageHandle, $right, $j, $t); 414 $left++; $right--; 415 } 416 } 417 418 return true; 419 } 420 421 422 /** 423 * Adjust the image gamma 424 * 425 * @param float $outputgamma 426 * 427 * @return none 428 */ 429 function gamma($outputgamma=1.0) { 430 ImageGammaCorrect($this->imageHandle, 1.0, $outputgamma); 431 } 432 433 /** 434 * Save the image file 435 * 436 * @param $filename string the name of the file to write to 437 * @param $quality int output DPI, default is 85 438 * @param $types string define the output format, default 439 * is the current used format 440 * 441 * @return none 442 */ 443 function save($filename, $type = '', $quality = 85) 444 { 445 $type = $type==''? $this->type : $type; 446 $functionName = 'image' . $type; 447 $this->old_image = $this->imageHandle; 448 $functionName($this->imageHandle, $filename) ; 449 $this->imageHandle = $this->old_image; 450 $this->resized = false; 451 } // End save 452 453 454 /** 455 * Display image without saving and lose changes 456 * 457 * @param string type (JPG,PNG...); 458 * @param int quality 75 459 * 460 * @return none 461 */ 462 function display($type = '', $quality = 75) 463 { 464 if ($type != '') { 465 $this->type = $type; 466 } 467 $functionName = 'Image' . $this->type; 468 header('Content-type: image/' . strtolower($this->type)); 469 $functionName($this->imageHandle, '', $quality); 470 $this->imageHandle = $this->old_image; 471 $this->resized = false; 472 ImageDestroy($this->old_image); 473 $this->free(); 474 } 475 476 /** 477 * Destroy image handle 478 * 479 * @return none 480 */ 481 function free() 482 { 483 if ($this->imageHandle){ 484 ImageDestroy($this->imageHandle); 485 } 486 } 487 488 } // End class ImageGD 489 ?>
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| Généré le : Sun Feb 25 17:20:01 2007 | par Balluche grâce à PHPXref 0.7 |