[Sommaire] [Imprimer]

   1  <?php
   2  /*
   3   * This work is hereby released into the Public Domain.
   4   * To view a copy of the public domain dedication,
   5   * visit http://creativecommons.org/licenses/publicdomain/ or send a letter to
   6   * Creative Commons, 559 Nathan Abbott Way, Stanford, California 94305, USA.
   7   *
   8   */
   9   
  10  require_once dirname(__FILE__)."/../Driver.class.php";
  11  
  12  /**
  13   * Draw your objects
  14   *
  15   * @package Artichow
  16   */
  17  
  18  class awGDDriver extends Driver {
  19      
  20      /**
  21       * A GD resource
  22       *
  23       * @var $resource
  24       */
  25      var $resource;
  26      
  27  	 function awGDDriver() {
  28          parent::Driver();
  29          
  30          $this->driverString = 'gd';
  31      }
  32  
  33  	 function init(&$image) {
  34          
  35          if($this->resource === NULL) {
  36              
  37              $this->setImageSize($image->width, $image->height);
  38              
  39              // Create image
  40              $this->resource = imagecreatetruecolor($this->imageWidth, $this->imageHeight);
  41              if(!$this->resource) {
  42                  awImage::drawError("Class Image: Unable to create a graph.");
  43              }
  44              
  45              imagealphablending($this->resource, TRUE);
  46              
  47              // Antialiasing is now handled by the Driver object
  48              $this->setAntiAliasing($image->getAntiAliasing());
  49              
  50              // Original color
  51              $this->filledRectangle(
  52                  new awWhite,
  53                  new awLine(
  54                      new awPoint(0, 0),
  55                      new awPoint($this->imageWidth, $this->imageHeight)
  56                  )
  57              );
  58              
  59              $shadow = $image->shadow;
  60              if($shadow !== NULL) {
  61                  $shadow = $shadow->getSpace();
  62                  $p1 = new awPoint($shadow->left, $shadow->top);
  63                  $p2 = new awPoint($this->imageWidth - $shadow->right - 1, $this->imageHeight - $shadow->bottom - 1);
  64                  
  65                  
  66                  // Draw image background
  67                  $this->filledRectangle($image->getBackground(), new awLine($p1, $p2));
  68                  
  69                  // Draw image border
  70                  $image->border->rectangle($this, $p1, $p2);
  71              }
  72              
  73          }
  74      }
  75      
  76  	 function initFromFile(&$fileImage, $file) {
  77          
  78          $image = @getimagesize((string)$file);
  79          
  80          if($image and in_array($image[2], array(2, 3))) {
  81          
  82              $fileImage->setSize($image[0], $image[1]);
  83              
  84              switch($image[2]) {
  85              
  86                  case 2 :
  87                      $this->resource = imagecreatefromjpeg($file);
  88                      break;
  89              
  90                  case 3 :
  91                      $this->resource = imagecreatefrompng($file);
  92                      break;
  93              
  94              }
  95  
  96              $this->setImageSize($fileImage->width, $fileImage->height);
  97          } else {
  98              awImage::drawError("Class FileImage: Artichow does not support the format of this image (must be in PNG or JPEG)");
  99          }
 100      }
 101      
 102  	 function setImageSize($width, $height) {
 103      
 104          $this->imageWidth = $width;
 105          $this->imageHeight = $height;
 106      
 107      }
 108      
 109  	 function setPosition($x, $y) {
 110          
 111          // Calculate absolute position
 112          $this->x = round($x * $this->imageWidth - $this->w / 2);
 113          $this->y = round($y * $this->imageHeight - $this->h / 2);
 114      
 115      }
 116      
 117  	 function setAbsPosition($x, $y) {
 118          
 119          $this->x = $x;
 120          $this->y = $y;
 121      
 122      }
 123      
 124  	 function movePosition($x, $y) {
 125  
 126          $this->x += (int)$x;
 127          $this->y += (int)$y;
 128      
 129      }
 130      
 131  	 function setSize($w, $h) {
 132      
 133          // Calcul absolute size
 134          $this->w = round($w * $this->imageWidth);
 135          $this->h = round($h * $this->imageHeight);
 136          
 137          return $this->getSize();
 138      
 139      }
 140      
 141  	 function setAbsSize($w, $h) {
 142      
 143          $this->w = $w;
 144          $this->h = $h;
 145          
 146          return $this->getSize();
 147      
 148      }
 149      
 150  	 function getSize() {
 151          
 152          return array($this->w, $this->h);
 153      
 154      }
 155      
 156  	 function setAntiAliasing($bool) {
 157          
 158          if(function_exists('imageantialias')) {
 159              imageantialias($this->resource, (bool)$bool);
 160  
 161              $this->antiAliasing = (bool)$bool;
 162          } else {
 163              awImage::drawErrorFile('missing-anti-aliasing');
 164          }
 165      }
 166      
 167  	 function getColor($color) {
 168  
 169          if($color->alpha === 0 or function_exists('imagecolorallocatealpha') === FALSE) {
 170              $gdColor = imagecolorallocate($this->resource, $color->red, $color->green, $color->blue);
 171          } else {
 172              $gdColor = imagecolorallocatealpha($this->resource, $color->red, $color->green, $color->blue, $color->alpha);
 173          }
 174  
 175          return $gdColor;
 176      }
 177      
 178  	 function copyImage(&$image, $p1, $p2) {
 179      
 180          list($x1, $y1) = $p1->getLocation();
 181          list($x2, $y2) = $p2->getLocation();
 182      
 183          $driver = $image->getDriver();
 184          imagecopy($this->resource, $driver->resource, $this->x + $x1, $this->y + $y1, 0, 0, $x2 - $x1, $y2 - $y1);
 185      
 186      }
 187      
 188  	 function copyResizeImage(&$image, $d1, $d2, $s1, $s2, $resample = TRUE) {
 189          
 190          if($resample) {
 191              $function = 'imagecopyresampled';
 192          } else {
 193              $function = 'imagecopyresized';
 194          }
 195          
 196          $driver = $image->getDriver();
 197      
 198          $function(
 199              $this->resource,
 200              $driver->resource,
 201              $this->x + $d1->x, $this->y + $d1->y,
 202              $s1->x, $s1->y,
 203              $d2->x - $d1->x, $d2->y - $d1->y,
 204              $s2->x - $s1->x, $s2->y - $s1->y
 205          );
 206      
 207      }
 208      
 209  	 function string(&$text, $point, $width = NULL) {
 210          
 211          $font = $text->getFont();
 212          
 213          // Can we deal with that font?
 214          if($this->isCompatibleWithFont($font) === FALSE) {
 215              awImage::drawError('Class GDDriver: Incompatible font type (\''.get_class($font).'\')');
 216          }
 217          
 218          // Check which FontDriver to use
 219          if(is_a($font, 'awPHPFont')) {
 220              $fontDriver = $this->phpFontDriver;
 221          } else {
 222              $fontDriver = $this->fileFontDriver;
 223          }
 224          
 225          if($text->getBackground() !== NULL or $text->border->visible()) {
 226          
 227              list($left, $right, $top, $bottom) = $text->getPadding();
 228  
 229              $textWidth = $fontDriver->getTextWidth($text, $this);
 230              $textHeight = $fontDriver->getTextHeight($text, $this);
 231              
 232              $x1 = floor($point->x - $left);
 233              $y1 = floor($point->y - $top);
 234              $x2 = $x1 + $textWidth + $left + $right;
 235              $y2 = $y1 + $textHeight + $top + $bottom;
 236              
 237              $this->filledRectangle(
 238                  $text->getBackground(),
 239                  awLine::build($x1, $y1, $x2, $y2)
 240              );
 241              
 242              $text->border->rectangle(
 243                  $this,
 244                  new awPoint($x1 - 1, $y1 - 1),
 245                  new awPoint($x2 + 1, $y2 + 1)
 246              );
 247              
 248          }
 249          
 250          $fontDriver->string($this, $text, $point, $width);
 251          
 252      }
 253      
 254  	 function point($color, $p) {
 255      
 256          if($p->isHidden() === FALSE) {
 257              $rgb = $this->getColor($color);
 258              imagesetpixel($this->resource, $this->x + round($p->x), $this->y + round($p->y), $rgb);
 259          }
 260      
 261      }
 262      
 263  	 function line($color, $line) {
 264      
 265          if($line->thickness > 0 and $line->isHidden() === FALSE) {
 266      
 267              $rgb = $this->getColor($color);
 268              $thickness = $line->thickness;
 269              
 270              list($p1, $p2) = $line->getLocation();
 271              
 272              $this->startThickness($thickness);
 273              
 274              switch($line->getStyle()) {
 275              
 276                  case LINE_SOLID :
 277                      imageline($this->resource, $this->x + round($p1->x), $this->y + round($p1->y), $this->x + round($p2->x), $this->y + round($p2->y), $rgb);
 278                      break;
 279                      
 280                  case LINE_DOTTED :
 281                      $size = sqrt(pow($p2->y - $p1->y, 2) + pow($p2->x - $p1->x, 2));
 282                      $cos = ($p2->x - $p1->x) / $size;
 283                      $sin = ($p2->y - $p1->y) / $size;
 284                      for($i = 0; $i <= $size; $i += 2) {
 285                          $p = new awPoint(
 286                              round($i * $cos + $p1->x),
 287                              round($i * $sin + $p1->y)
 288                          );
 289                          $this->point($color, $p);
 290                      }
 291                      break;
 292                      
 293                  case LINE_DASHED :
 294                      $width = $p2->x - $p1->x;
 295                      $height = $p2->y - $p1->y;
 296                      $size = sqrt(pow($height, 2) + pow($width, 2));
 297                      
 298                      if($size == 0) {
 299                          return;
 300                      }
 301                      
 302                      $cos = $width / $size;
 303                      $sin = $height / $size;
 304                      
 305                      $functionX = ($width  > 0) ? 'min' : 'max';
 306                      $functionY = ($height > 0) ? 'min' : 'max';
 307                      
 308                      for($i = 0; $i <= $size; $i += 6) {
 309                          
 310                          $t1 = new awPoint(
 311                              round($i * $cos + $p1->x),
 312                              round($i * $sin + $p1->y)
 313                          );
 314                          
 315                          $t2 = new awPoint(
 316                              round($functionX(($i + 3) * $cos, $width) + $p1->x),
 317                              round($functionY(($i + 3) * $sin, $height) + $p1->y)
 318                          );
 319                          
 320                          $this->line($color, new awLine($t1, $t2));
 321                          
 322                      }
 323                      break;
 324              
 325              }
 326              
 327              $this->stopThickness($thickness);
 328              
 329          }
 330          
 331      }
 332      
 333  	 function arc($color, $center, $width, $height, $from, $to) {
 334      
 335          imagefilledarc(
 336              $this->resource,
 337              $this->x + $center->x, $this->y + $center->y,
 338              $width, $height,
 339              $from, $to,
 340              $this->getColor($color),
 341              IMG_ARC_EDGED | IMG_ARC_NOFILL
 342          );
 343      
 344      }
 345      
 346  	 function filledArc($color, $center, $width, $height, $from, $to) {
 347      
 348          imagefilledarc(
 349              $this->resource,
 350              $this->x + $center->x, $this->y + $center->y,
 351              $width, $height,
 352              $from, $to,
 353              $this->getColor($color),
 354              IMG_ARC_PIE
 355          );
 356      
 357      }
 358      
 359  	 function ellipse($color, $center, $width, $height) {
 360      
 361          list($x, $y) = $center->getLocation();
 362      
 363          $rgb = $this->getColor($color);
 364          imageellipse(
 365              $this->resource,
 366              $this->x + $x,
 367              $this->y + $y,
 368              $width,
 369              $height,
 370              $rgb
 371          );
 372          
 373      }
 374      
 375  	 function filledEllipse($background, $center, $width, $height) {
 376      
 377          if(is_a($background, 'awColor')) {
 378      
 379              list($x, $y) = $center->getLocation();
 380          
 381              $rgb = $this->getColor($background);
 382              
 383              imagefilledellipse(
 384                  $this->resource,
 385                  $this->x + $x,
 386                  $this->y + $y,
 387                  $width,
 388                  $height,
 389                  $rgb
 390              );
 391              
 392          } else if(is_a($background, 'awGradient')) {
 393      
 394              list($x, $y) = $center->getLocation();
 395              
 396              $x1 = $x - round($width / 2);
 397              $y1 = $y - round($height / 2);
 398              $x2 = $x1 + $width;
 399              $y2 = $y1 + $height;
 400          
 401              $gradientDriver = new awGDGradientDriver($this);
 402              $gradientDriver->filledEllipse(
 403                  $background,
 404                  $x1, $y1,
 405                  $x2, $y2
 406              );
 407          
 408          }
 409          
 410      }
 411      
 412  	 function rectangle($color, $line) {
 413      
 414          list($p1, $p2) = $line->getLocation();
 415          
 416          switch($line->getStyle()) {
 417          
 418              case LINE_SOLID :
 419                  $thickness = $line->getThickness();
 420                  $this->startThickness($thickness);
 421                  $rgb = $this->getColor($color);
 422                  imagerectangle($this->resource, $this->x + $p1->x, $this->y + $p1->y, $this->x + $p2->x, $this->y + $p2->y, $rgb);
 423                  $this->stopThickness($thickness);
 424                  break;
 425              
 426              default :
 427                  
 428                  
 429                  $side = new Line($p1, $p2);
 430                  
 431                  
 432                  // Top side
 433                  $side->setLocation(
 434                      new awPoint($p1->x, $p1->y),
 435                      new awPoint($p2->x, $p1->y)
 436                  );
 437                  $this->line($color, $side);
 438                  
 439                  // Right side
 440                  $side->setLocation(
 441                      new awPoint($p2->x, $p1->y),
 442                      new awPoint($p2->x, $p2->y)
 443                  );
 444                  $this->line($color, $side);
 445                  
 446                  // Bottom side
 447                  $side->setLocation(
 448                      new awPoint($p1->x, $p2->y),
 449                      new awPoint($p2->x, $p2->y)
 450                  );
 451                  $this->line($color, $side);
 452                  
 453                  // Left side
 454                  $side->setLocation(
 455                      new awPoint($p1->x, $p1->y),
 456                      new awPoint($p1->x, $p2->y)
 457                  );
 458                  $this->line($color, $side);
 459              
 460                  break;
 461          
 462          }
 463      
 464      }
 465      
 466  	 function filledRectangle($background, $line) {
 467      
 468          $p1 = $line->p1;
 469          $p2 = $line->p2;
 470      
 471          if(is_a($background, 'awColor')) {
 472              $rgb = $this->getColor($background);
 473              imagefilledrectangle($this->resource, $this->x + $p1->x, $this->y + $p1->y, $this->x + $p2->x, $this->y + $p2->y, $rgb);
 474          } else if(is_a($background, 'awGradient')) {
 475              $gradientDriver = new awGDGradientDriver($this);
 476              $gradientDriver->filledRectangle($background, $p1, $p2);
 477          }
 478      
 479      }
 480      
 481  	 function polygon($color, &$polygon) {
 482          
 483          switch($polygon->getStyle()) {
 484          
 485              case POLYGON_SOLID :
 486                  $thickness = $polygon->getThickness();
 487                  $this->startThickness($thickness);
 488                  $points = $this->getPolygonPoints($polygon);
 489                  $rgb = $this->getColor($color);
 490                  imagepolygon($this->resource, $points, $polygon->count(), $rgb);
 491                  $this->stopThickness($thickness);
 492                  break;
 493                  
 494              default :
 495              
 496                  if($polygon->count() > 1) {
 497                  
 498                      $prev = $polygon->get(0);
 499                      
 500                      $line = new awLine;
 501                      $line->setStyle($polygon->getStyle());
 502                      $line->setThickness($polygon->getThickness());
 503                      
 504                      for($i = 1; $i < $polygon->count(); $i++) {
 505                          $current = $polygon->get($i);
 506                          $line->setLocation($prev, $current);
 507                          $this->line($color, $line);
 508                          $prev = $current;
 509                      }
 510                      
 511                      // Close the polygon
 512                      $line->setLocation($prev, $polygon->get(0));
 513                      $this->line($color, $line);
 514                      
 515                  }
 516          
 517          }
 518          
 519      }
 520      
 521  	 function filledPolygon($background, &$polygon) {
 522          
 523          if(is_a($background, 'awColor')) {
 524              
 525              $points = $this->getPolygonPoints($polygon);
 526              $rgb = $this->getColor($background);
 527              
 528              imagefilledpolygon($this->resource, $points, $polygon->count(), $rgb);
 529              
 530          } else if(is_a($background, 'awGradient')) {
 531              
 532              $gradientDriver = new awGDGradientDriver($this);
 533              $gradientDriver->filledPolygon($background, $polygon);
 534              
 535          }
 536  
 537      }
 538  
 539  	 function send(&$image) {
 540  
 541          $this->drawImage($image);
 542  
 543      }
 544      
 545  	 function get(&$image) {
 546          
 547          return $this->drawImage($image, TRUE, FALSE);
 548          
 549      }
 550      
 551  	 function getTextWidth(&$text) {
 552          $font = $text->getFont();
 553          
 554          if(is_a($font, 'awPHPFont')) {
 555              $fontDriver = $this->phpFontDriver;
 556          } else {
 557              $fontDriver = $this->fileFontDriver;
 558          }
 559          
 560          return $fontDriver->getTextWidth($text, $this);
 561      }
 562      
 563  	 function getTextHeight(&$text) {
 564          $font = $text->getFont();
 565          
 566          if(is_a($font, 'awPHPFont')) {
 567              $fontDriver = $this->phpFontDriver;
 568          } else {
 569              $fontDriver = $this->fileFontDriver;
 570          }
 571          
 572          return $fontDriver->getTextHeight($text, $this);
 573      }
 574      
 575  	 function isCompatibleWithFont(&$font) {
 576          if(is_a($font, 'awFDBFont')) {
 577              return FALSE;
 578          } else {
 579              return TRUE;
 580          }
 581      }
 582      
 583  	 function drawImage(&$image, $return = FALSE, $header = TRUE) {
 584          
 585          $format = $image->getFormatString();
 586          
 587          // Test if format is available
 588          if((imagetypes() & $image->getFormat()) === FALSE) {
 589              awImage::drawError("Class Image: Format '".$format."' is not available on your system. Check that your PHP has been compiled with the good libraries.");
 590          }
 591      
 592          // Get some infos about this image
 593          switch($format) {
 594              case 'jpeg' :
 595                  $function = 'imagejpeg';
 596                  break;
 597              case 'png' :
 598                  $function = 'imagepng';
 599                  break;
 600              case 'gif' :
 601                  $function = 'imagegif';
 602                  break;
 603          }
 604          
 605          // Send headers to the browser
 606          if($header === TRUE) {
 607              $image->sendHeaders();
 608          }
 609          
 610          if($return) {
 611              ob_start();
 612          }
 613          
 614          $function($this->resource);
 615          
 616          if($return) {
 617              return ob_get_clean();
 618          }
 619      }
 620      
 621  	 function getPolygonPoints(&$polygon) {
 622          
 623          $points = array();
 624          
 625          foreach($polygon->all() as $point) {
 626              $points[] = $point->x + $this->x;
 627              $points[] = $point->y + $this->y;
 628          }
 629          
 630          return $points;
 631          
 632      }
 633      
 634  	 function startThickness($thickness) {
 635          
 636          if($thickness > 1) {
 637          
 638              // Beurk :'(
 639              if($this->antiAliasing and function_exists('imageantialias')) {
 640                  imageantialias($this->resource, FALSE);
 641              }
 642              imagesetthickness($this->resource, $thickness);
 643              
 644          }
 645          
 646      }
 647      
 648  	 function stopThickness($thickness) {
 649          
 650          if($thickness > 1) {
 651          
 652              if($this->antiAliasing and function_exists('imageantialias')) {
 653                  imageantialias($this->resource, TRUE);
 654              }
 655              imagesetthickness($this->resource, 1);
 656              
 657          }
 658          
 659      }
 660      
 661  
 662  }
 663  
 664  registerClass('GDDriver');
 665  
 666  /**
 667   * To your gradients
 668   *
 669   * @package Artichow
 670   */
 671  
 672  class awGDGradientDriver {
 673  
 674      /**
 675       * A driver
 676       *
 677       * @var awGDDriver
 678       */
 679      var $driver;
 680  
 681      /**
 682       * Build your GDGradientDriver
 683       *
 684       * @var $driver 
 685       */
 686  	 function awGDGradientDriver($driver) {
 687      
 688          $this->driver = $driver;
 689          
 690      }
 691      
 692  	 function drawFilledFlatTriangle($gradient, $a, $b, $c) {
 693      
 694          if($gradient->angle !== 0) {
 695              awImage::drawError("Class GDGradientDriver: Flat triangles can only be used with 0 degree gradients.");
 696          }
 697      
 698          // Look for right-angled triangle
 699          if($a->x !== $b->x and $b->x !== $c->x) {
 700              awImage::drawError("Class GDGradientDriver: Not right-angled flat triangles are not supported yet.");
 701          }
 702          
 703          if($a->x === $b->x) {
 704              $d = $a;
 705              $e = $c;
 706          } else {
 707              $d = $c;
 708              $e = $a;
 709          }
 710          
 711          $this->init($gradient, $b->y - $d->y);
 712      
 713          for($i = $c->y + 1; $i < $b->y; $i++) {
 714              
 715              $color = $this->color($i - $d->y);
 716              $pos = ($i - $d->y) / ($b->y - $d->y);
 717              
 718              $p1 = new awPoint($e->x, $i);
 719              $p2 = new awPoint(1 + floor($e->x - $pos * ($e->x - $d->x)), $i);
 720              
 721              $this->driver->filledRectangle($color, new awLine($p1, $p2));
 722              
 723              unset($color);
 724              
 725          }
 726      
 727      }
 728      
 729  	 function drawFilledTriangle($gradient, &$polygon) {
 730          
 731          if($gradient->angle === 0) {
 732              $this->drawFilledTriangleVertically($gradient, $polygon);
 733          } elseif($gradient->angle === 90) {
 734              $this->drawFilledTriangleHorizontally($gradient, $polygon);
 735          }
 736          
 737      }
 738      
 739  	 function drawFilledTriangleVertically($gradient, &$polygon) {
 740          list($yMin, $yMax) = $polygon->getBoxYRange();
 741          
 742          $this->init($gradient, $yMax - $yMin);
 743          
 744          // Get the triangle line we will draw our lines from
 745          $fromLine = NULL;
 746          $lines = $polygon->getLines();
 747                  
 748          $count = count($lines);
 749                      
 750          // Pick the side of the triangle going from the top
 751          // to the bottom of the surrounding box
 752          for($i = 0; $i < $count; $i++) {
 753              if($lines[$i]->isTopToBottom($polygon)) {
 754                  list($fromLine) = array_splice($lines, $i, 1);
 755                  break;
 756              }
 757          }
 758          
 759          // If for some reason the three points are aligned,
 760          // $fromLine will still be NULL
 761          if($fromLine === NULL) {
 762              return;
 763          }
 764                          
 765          $fillLine = NULL;
 766          for($y = round($yMin); $y < round($yMax); $y++) {
 767              
 768              $fromX = $fromLine->getXFrom($y);
 769              
 770              $toX = array();
 771              foreach($lines as $line) {
 772                  $xValue = $line->getXFrom($y);
 773                  
 774                  if(!is_null($xValue)) {
 775                      $toX[] = $xValue;
 776                  }
 777              }
 778              
 779              if(count($toX) === 1) {
 780                  $fillLine = new Line(
 781                      new Point($fromX, $y),
 782                      new Point($toX[0], $y)
 783                  );
 784              } else {
 785              
 786                  $line1 = new Line(
 787                      new Point($fromX, $y),
 788                      new Point($toX[0], $y)
 789                  );
 790                  $line2 = new  Line(
 791                      new Point($fromX, $y),
 792                      new Point($toX[1], $y)
 793                  );
 794              
 795                  if($line1->getSize() < $line2->getSize()) {
 796                      $fillLine = $line1;
 797                  } else {
 798                      $fillLine = $line2;
 799                  }
 800              }
 801              
 802              if(!$fillLine->isPoint()) {
 803                  $color = $this->color($y - $yMin);
 804                  $this->driver->line($color, $fillLine);
 805                  
 806                  unset($color);
 807              }
 808          }
 809      
 810      }
 811      
 812  	 function drawFilledTriangleHorizontally($gradient, &$polygon) {
 813          list($xMin, $xMax) = $polygon->getBoxXRange();
 814          
 815          $this->init($gradient, $xMax - $xMin);
 816          
 817          // Get the triangle line we will draw our lines from
 818          $fromLine = NULL;
 819          $lines = $polygon->getLines();
 820                  
 821          $count = count($lines);
 822                      
 823          // Pick the side of the triangle going all the way
 824          // from the left side to the right side of the surrounding box
 825          for($i = 0; $i < $count; $i++) {
 826              if($lines[$i]->isLeftToRight($polygon)) {
 827                  list($fromLine) = array_splice($lines, $i, 1);
 828                  break;
 829              }
 830          }
 831          
 832          // If for some reason the three points are aligned,
 833          // $fromLine will still be NULL
 834          if($fromLine === NULL) {
 835              return;
 836          }
 837  
 838          $fillLine = NULL;
 839          for($x = round($xMin); $x < round($xMax); $x++) {
 840              
 841              $fromY = floor($fromLine->getYFrom($x));
 842              
 843              $toY = array();
 844              foreach($lines as $line) {
 845                  $yValue = $line->getYFrom($x);
 846                  
 847                  if(!is_null($yValue)) {
 848                      $toY[] = floor($yValue);
 849                  }
 850              }
 851              
 852              if(count($toY) === 1) {
 853                  $fillLine = new Line(
 854                      new Point($x, $fromY),
 855                      new Point($x, $toY[0])
 856                  );
 857              } else {
 858              
 859                  $line1 = new Line(
 860                      new Point($x, $fromY),
 861                      new Point($x, $toY[0])
 862                  );
 863                  $line2 = new  Line(
 864                      new Point($x, $fromY),
 865                      new Point($x, $toY[1])
 866                  );
 867              
 868                  if($line1->getSize() < $line2->getSize()) {
 869                      $fillLine = $line1;
 870                  } else {
 871                      $fillLine = $line2;
 872                  }
 873              }
 874              
 875              $color = $this->color($x - $xMin);
 876              if($fillLine->isPoint()) {
 877                  $this->driver->point($color, $fillLine->p1);
 878              } elseif($fillLine->getSize() >= 1) {
 879                  $this->driver->line($color, $fillLine);
 880              }
 881              unset($color);
 882          }
 883      
 884      }
 885      
 886  	 function filledRectangle($gradient, $p1, $p2) {
 887      
 888          list($x1, $y1) = $p1->getLocation();
 889          list($x2, $y2) = $p2->getLocation();
 890      
 891          if($y1 < $y2) {
 892              $y1 ^= $y2 ^= $y1 ^= $y2;
 893          }
 894      
 895          if($x2 < $x1) {
 896              $x1 ^= $x2 ^= $x1 ^= $x2;
 897          }
 898          
 899          if(is_a($gradient, 'awLinearGradient')) {
 900              $this->rectangleLinearGradient($gradient, new awPoint($x1, $y1), new awPoint($x2, $y2));
 901          } else {
 902              awImage::drawError("Class GDGradientDriver: This gradient is not supported by rectangles.");
 903          }
 904      
 905      }
 906      
 907  	 function filledPolygon($gradient, &$polygon) {
 908      
 909          if(is_a($gradient, 'awLinearGradient')) {
 910              $this->polygonLinearGradient($gradient, $polygon);
 911          } else {
 912              awImage::drawError("Class GDGradientDriver: This gradient is not supported by polygons.");
 913          }
 914      
 915      }
 916      
 917  	 function rectangleLinearGradient(&$gradient, $p1, $p2) {
 918      
 919          list($x1, $y1) = $p1->getLocation();
 920          list($x2, $y2) = $p2->getLocation();
 921      
 922          if($y1 - $y2 > 0) {
 923          
 924              if($gradient->angle === 0) {
 925              
 926                  $this->init($gradient, $y1 - $y2);
 927          
 928                  for($i = $y2; $i <= $y1; $i++) {
 929                  
 930                      $color = $this->color($i - $y2);
 931                      
 932                      $p1 = new awPoint($x1, $i);
 933                      $p2 = new awPoint($x2, $i);
 934              
 935                      $this->driver->filledRectangle($color, new awLine($p1, $p2));
 936                      
 937                      unset($color);
 938                      
 939                  }
 940                  
 941              } else if($gradient->angle === 90) {
 942              
 943                  $this->init($gradient, $x2 - $x1);
 944          
 945                  for($i = $x1; $i <= $x2; $i++) {
 946                  
 947                      $color = $this->color($i - $x1);
 948                      
 949                      $p1 = new awPoint($i, $y2);
 950                      $p2 = new awPoint($i, $y1);
 951              
 952                      $this->driver->filledRectangle($color, new awLine($p1, $p2));
 953                      
 954                      unset($color);
 955                      
 956                  }
 957                  
 958              }
 959              
 960          }
 961      
 962      }
 963      
 964  	 function filledEllipse($gradient, $x1, $y1, $x2, $y2) {
 965      
 966          if($y1 < $y2) {
 967              $y1 ^= $y2 ^= $y1 ^= $y2;
 968          }
 969      
 970          if($x2 < $x1) {
 971              $x1 ^= $x2 ^= $x1 ^= $x2;
 972          }
 973          
 974          if(is_a($gradient, 'awRadialGradient')) {
 975              $this->ellipseRadialGradient($gradient, $x1, $y1, $x2, $y2);
 976          } else if(is_a($gradient, 'awLinearGradient')) {
 977              $this->ellipseLinearGradient($gradient, $x1, $y1, $x2, $y2);
 978          } else {
 979              awImage::drawError("Class GDGradientDriver: This gradient is not supported by ellipses.");
 980          }
 981      
 982      }
 983      
 984  	 function ellipseRadialGradient($gradient, $x1, $y1, $x2, $y2) {
 985      
 986          if($y1 - $y2 > 0) {
 987      
 988              if($y1 - $y2 != $x2 - $x1) {
 989                  awImage::drawError("Class GDGradientDriver: Radial gradients are only implemented on circle, not ellipses.");
 990              }
 991              
 992              $c = new awPoint($x1 + ($x2 - $x1) / 2, $y1 + ($y2 - $y1) / 2); 
 993              $r = ($x2 - $x1) / 2;
 994              $ok = array();
 995              
 996              // Init gradient
 997              $this->init($gradient, $r);
 998              
 999              for($i = 0; $i <= $r; $i += 0.45) {
1000              
1001                  $p = ceil((2 * M_PI * $i));
1002                  
1003                  if($p > 0) {
1004                      $interval = 360 / $p;
1005                  } else {
1006                      $interval = 360;
1007                  }
1008                  
1009                  $color = $this->color($i);
1010                  
1011                  for($j = 0; $j < 360; $j += $interval) {
1012                  
1013                      $rad = ($j / 360) * (2 * M_PI);
1014                      
1015                      $x = round($i * cos($rad));
1016                      $y = round($i * sin($rad));
1017                      
1018                      $l = sqrt($x * $x + $y * $y);
1019                      
1020                      if($l <= $r) {
1021                      
1022                          if(
1023                              array_key_exists((int)$x, $ok) === FALSE or
1024                              array_key_exists((int)$y, $ok[$x]) === FALSE
1025                          ) {
1026                          
1027                              // Print the point
1028                              $this->driver->point($color, new awPoint($c->x + $x, $c->y + $y));
1029                              
1030                              $ok[(int)$x][(int)$y] = TRUE;
1031                          
1032                          }
1033                          
1034                      }
1035                  
1036                  }
1037                  
1038                  unset($color);
1039              
1040              }
1041          
1042          }
1043      
1044      }
1045      
1046  	 function ellipseLinearGradient($gradient, $x1, $y1, $x2, $y2) {
1047      
1048          // Gauche->droite : 90°
1049      
1050          if($y1 - $y2 > 0) {
1051      
1052              if($y1 - $y2 != $x2 - $x1) {
1053                  awImage::drawError("Class GDGradientDriver: Linear gradients are only implemented on circle, not ellipses.");
1054              }
1055              
1056              $r = ($x2 - $x1) / 2;
1057              
1058              // Init gradient
1059              $this->init($gradient, $x2 - $x1);
1060              
1061              for($i = -$r; $i <= $r; $i++) {
1062                  
1063                  $h = sin(acos($i / $r)) * $r;
1064                  
1065                  $color = $this->color($i + $r);
1066                  
1067                  if($gradient->angle === 90) {
1068                  
1069                      // Print the line
1070                      $p1 = new awPoint(
1071                          $x1 + $i + $r,
1072                          round(max($y2 + $r - $h + 1, $y2))
1073                      );
1074                      
1075                      $p2 = new awPoint(
1076                          $x1 + $i + $r,
1077                          round(min($y1 - $r + $h - 1, $y1))
1078                      );
1079                      
1080                  } else {
1081                  
1082                      // Print the line
1083                      $p1 = new awPoint(
1084                          round(max($x1 + $r - $h + 1, $x1)),
1085                          $y2 + $i + $r
1086                      );
1087                      
1088                      $p2 = new awPoint(
1089                          round(min($x2 - $r + $h - 1, $x2)),
1090                          $y2 + $i + $r
1091                      );
1092                      
1093                  }
1094                  
1095                  $this->driver->filledRectangle($color, new awLine($p1, $p2));
1096                  
1097                  unset($color);
1098              
1099              }
1100          
1101          }
1102      
1103      }
1104      
1105  	 function polygonLinearGradient(&$gradient, &$polygon) {
1106      
1107          $count = $polygon->count();
1108          
1109          if($count >= 4) {
1110          
1111              $left = $polygon->get(0);
1112              $right = $polygon->get($count - 1);
1113              
1114              if($gradient->angle === 0) {
1115              
1116                  // Get polygon maximum and minimum
1117                  $offset = $polygon->get(0);
1118                  $max = $min = $offset->y;
1119                  for($i = 1; $i < $count - 1; $i++) {
1120                      $offset = $polygon->get($i);
1121                      $max = max($max, $offset->y);
1122                      $min = min($min, $offset->y);
1123                  }
1124                  
1125                  $this->init($gradient, $max - $min);
1126              
1127                  $prev = $polygon->get(1);
1128                  
1129                  $sum = 0;
1130              
1131                  for($i = 2; $i < $count - 1; $i++) {
1132                  
1133                      $current = $polygon->get($i);
1134                      
1135                      $interval = 1;
1136                      
1137                      if($i !== $count - 2) {
1138                          $current->x -= $interval;
1139                      }
1140                      
1141                      if($current->x - $prev->x > 0) {
1142                  
1143                          // Draw rectangle
1144                          $x1 = $prev->x;
1145                          $x2 = $current->x;
1146                          $y1 = max($prev->y, $current->y);
1147                          $y2 = $left->y;
1148                          
1149                          $gradient = new awLinearGradient(
1150                              $this->color($max - $min - ($y2 - $y1)),
1151                              $this->color($max - $min),
1152                              0
1153                          );
1154                          
1155                          if($y1 > $y2) {
1156                              $y2 = $y1;
1157                          }
1158                          
1159                          $this->driver->filledRectangle(
1160                              $gradient,
1161                              awLine::build($x1, $y1, $x2, $y2)
1162                          );
1163                          
1164                          $top = ($prev->y < $current->y) ? $current : $prev;
1165                          $bottom = ($prev->y >= $current->y) ? $current : $prev;
1166                          
1167                          $gradient = new awLinearGradient(
1168                              $this->color($bottom->y - $min),
1169                              $this->color($max - $min - ($y2 - $y1)),
1170                              0
1171                          );
1172                          
1173      
1174                          $gradientDriver = new awGDGradientDriver($this->driver);
1175                          $gradientDriver->drawFilledFlatTriangle(
1176                              $gradient,
1177                              new awPoint($prev->x, min($prev->y, $current->y)),
1178                              $top,
1179                              new awPoint($current->x, min($prev->y, $current->y))
1180                          );
1181                          unset($gradientDriver);
1182                          
1183                          $sum += $current->x - $prev->x;
1184                          
1185                      }
1186                      
1187                      $prev = $current;
1188                      $prev->x += $interval;
1189                  
1190                  }
1191              
1192              } else if($gradient->angle === 90) {
1193                  
1194                  $width = $right->x - $left->x;
1195                  $this->init($gradient, $width);
1196                  
1197                  $pos = 1;
1198                  $next = $polygon->get($pos++);
1199                  
1200                  $this->next($polygon, $pos, $prev, $next);
1201              
1202                  for($i = 0; $i <= $width; $i++) {
1203                  
1204                      $x = $left->x + $i;
1205                      
1206                      $y1 = round($prev->y + ($next->y - $prev->y) * (($i + $left->x - $prev->x) / ($next->x - $prev->x)));
1207                      $y2 = $left->y;
1208                  
1209                      // Draw line
1210                      $color = $this->color($i);
1211                      // YaPB : PHP does not handle alpha on lines
1212                      $this->driver->filledRectangle($color, awLine::build($x, $y1, $x, $y2));
1213  
1214                      unset($color);
1215                      
1216                      // Jump to next point
1217                      if($next->x == $i + $left->x) {
1218                      
1219                          $this->next($polygon, $pos, $prev, $next);
1220                          
1221                      }
1222                  
1223                  }
1224      
1225              }
1226              
1227          } else if($count === 3) {
1228              $this->drawFilledTriangle(
1229                  $gradient,
1230                  $polygon
1231              );
1232          }
1233      
1234      }
1235      
1236  	 function next($polygon, &$pos, &$prev, &$next) {
1237      
1238          do {
1239              $prev = $next;
1240              $next = $polygon->get($pos++);
1241          }
1242          while($next->x - $prev->x == 0 and $pos < $polygon->count());
1243          
1244      }
1245      
1246      /**
1247       * Start colors
1248       *
1249       * @var int
1250       */
1251      var $r1, $g1, $b1, $a1;
1252      
1253      /**
1254       * Stop colors
1255       *
1256       * @var int
1257       */
1258      var $r2, $g2, $b2, $a2;
1259      
1260      /**
1261       * Gradient size in pixels
1262       *
1263       * @var int
1264       */
1265      var $size;
1266      
1267      
1268  	 function init($gradient, $size) {
1269          
1270          list(
1271              $this->r1, $this->g1, $this->b1, $this->a1
1272          ) = $gradient->from->rgba();
1273          
1274          list(
1275              $this->r2, $this->g2, $this->b2, $this->a2
1276          ) = $gradient->to->rgba();
1277          
1278          $this->size = $size;
1279      }
1280      
1281  	 function color($pos) {
1282      
1283          return new awColor(
1284              $this->getRed($pos),
1285              $this->getGreen($pos),
1286              $this->getBlue($pos),
1287              $this->getAlpha($pos)
1288          );
1289          
1290      }
1291      
1292      
1293  	 function getRed($pos) {
1294          if((float)$this->size !== 0.0) {
1295              return (int)round($this->r1 + ($pos / $this->size) * ($this->r2 - $this->r1));
1296          } else {
1297              return 0;
1298          }
1299      }
1300      
1301  	 function getGreen($pos) {
1302          if((float)$this->size !== 0.0) {
1303              return (int)round($this->g1 + ($pos / $this->size) * ($this->g2 - $this->g1));
1304          } else {
1305              return 0;
1306          }
1307      }
1308      
1309  	 function getBlue($pos) {
1310          if((float)$this->size !== 0.0) {
1311              return (int)round($this->b1 + ($pos / $this->size) * ($this->b2 - $this->b1));
1312          } else {
1313              return 0;
1314          }
1315      }
1316      
1317  	 function getAlpha($pos) {
1318          if((float)$this->size !== 0.0) {
1319              return (int)round(($this->a1 + ($pos / $this->size) * ($this->a2 - $this->a1)) / 127 * 100);
1320          } else {
1321              return 0;
1322          }
1323      }
1324  
1325  }
1326  
1327  registerClass('GDGradientDriver');
1328  
1329  /*
1330   * Check for GD2
1331   */
1332  if(function_exists('imagecreatetruecolor') === FALSE) {
1333      awImage::drawErrorFile('missing-gd2');
1334  }
1335  
1336  ?>