pImage.class.php in Visitors 7

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7.2 pChart/class/pImage.class.php
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pChart/class/pImage.class.php
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<?php

/*
    pDraw - pChart core class

    Version     : 2.1.4
    Made by     : Jean-Damien POGOLOTTI
    Last Update : 19/01/2014

    This file can be distributed under the license you can find at :

                      http://www.pchart.net/license

    You can find the whole class documentation on the pChart web site.
*/

/* The GD extension is mandatory */
if (!extension_loaded('gd') && !extension_loaded('gd2')) {
  echo "GD extension must be loaded. \r\n";
  exit;
}

/* Image map handling */
define("IMAGE_MAP_STORAGE_FILE", 680001);
define("IMAGE_MAP_STORAGE_SESSION", 680002);

/* Last generated chart layout */
define("CHART_LAST_LAYOUT_REGULAR", 680011);
define("CHART_LAST_LAYOUT_STACKED", 680012);

/* ImageMap string delimiter */
define("IMAGE_MAP_DELIMITER", chr(1));
class pImage extends pDraw {

  /* Image settings, size, quality, .. */
  var $XSize = NULL;

  // Width of the picture
  var $YSize = NULL;

  // Height of the picture
  var $Picture = NULL;

  // GD picture object
  var $Antialias = TRUE;

  // Turn antialias on or off
  var $AntialiasQuality = 0;

  // Quality of the antialiasing implementation (0-1)
  var $Mask = "";

  // Already drawn pixels mask (Filled circle implementation)
  var $TransparentBackground = FALSE;

  // Just to know if we need to flush the alpha channels when rendering

  /* Graph area settings */
  var $GraphAreaX1 = NULL;

  // Graph area X origin
  var $GraphAreaY1 = NULL;

  // Graph area Y origin
  var $GraphAreaX2 = NULL;

  // Graph area bottom right X position
  var $GraphAreaY2 = NULL;

  // Graph area bottom right Y position

  /* Scale settings */
  var $ScaleMinDivHeight = 20;

  // Minimum height for scame divs

  /* Font properties */
  var $FontName = "fonts/GeosansLight.ttf";

  // Default font file
  var $FontSize = 12;

  // Default font size
  var $FontBox = NULL;

  // Return the bounding box of the last written string
  var $FontColorR = 0;

  // Default color settings
  var $FontColorG = 0;

  // Default color settings
  var $FontColorB = 0;

  // Default color settings
  var $FontColorA = 100;

  // Default transparency

  /* Shadow properties */
  var $Shadow = FALSE;

  // Turn shadows on or off
  var $ShadowX = NULL;

  // X Offset of the shadow
  var $ShadowY = NULL;

  // Y Offset of the shadow
  var $ShadowR = NULL;

  // R component of the shadow
  var $ShadowG = NULL;

  // G component of the shadow
  var $ShadowB = NULL;

  // B component of the shadow
  var $Shadowa = NULL;

  // Alpha level of the shadow

  /* Image map */
  var $ImageMap = NULL;

  // Aray containing the image map
  var $ImageMapIndex = "pChart";

  // Name of the session array
  var $ImageMapStorageMode = NULL;

  // Save the current imagemap storage mode
  var $ImageMapAutoDelete = TRUE;

  // Automatic deletion of the image map temp files

  /* Data Set */
  var $DataSet = NULL;

  // Attached dataset

  /* Last generated chart info */
  var $LastChartLayout = CHART_LAST_LAYOUT_REGULAR;

  // Last layout : regular or stacked

  /* Class constructor */
  function pImage($XSize, $YSize, $DataSet = NULL, $TransparentBackground = FALSE) {
    $this->TransparentBackground = $TransparentBackground;
    if ($DataSet != NULL) {
      $this->DataSet = $DataSet;
    }
    $this->XSize = $XSize;
    $this->YSize = $YSize;
    $this->Picture = imagecreatetruecolor($XSize, $YSize);
    if ($this->TransparentBackground) {
      imagealphablending($this->Picture, FALSE);
      imagefilledrectangle($this->Picture, 0, 0, $XSize, $YSize, imagecolorallocatealpha($this->Picture, 255, 255, 255, 127));
      imagealphablending($this->Picture, TRUE);
      imagesavealpha($this->Picture, true);
    }
    else {
      $C_White = $this
        ->AllocateColor($this->Picture, 255, 255, 255);
      imagefilledrectangle($this->Picture, 0, 0, $XSize, $YSize, $C_White);
    }
  }

  /* Enable / Disable and set shadow properties */
  function setShadow($Enabled = TRUE, $Format = "") {
    $X = isset($Format["X"]) ? $Format["X"] : 2;
    $Y = isset($Format["Y"]) ? $Format["Y"] : 2;
    $R = isset($Format["R"]) ? $Format["R"] : 0;
    $G = isset($Format["G"]) ? $Format["G"] : 0;
    $B = isset($Format["B"]) ? $Format["B"] : 0;
    $Alpha = isset($Format["Alpha"]) ? $Format["Alpha"] : 10;
    $this->Shadow = $Enabled;
    $this->ShadowX = $X;
    $this->ShadowY = $Y;
    $this->ShadowR = $R;
    $this->ShadowG = $G;
    $this->ShadowB = $B;
    $this->Shadowa = $Alpha;
  }

  /* Set the graph area position */
  function setGraphArea($X1, $Y1, $X2, $Y2) {
    if ($X2 < $X1 || $X1 == $X2 || $Y2 < $Y1 || $Y1 == $Y2) {
      return -1;
    }
    $this->GraphAreaX1 = $X1;
    $this->DataSet->Data["GraphArea"]["X1"] = $X1;
    $this->GraphAreaY1 = $Y1;
    $this->DataSet->Data["GraphArea"]["Y1"] = $Y1;
    $this->GraphAreaX2 = $X2;
    $this->DataSet->Data["GraphArea"]["X2"] = $X2;
    $this->GraphAreaY2 = $Y2;
    $this->DataSet->Data["GraphArea"]["Y2"] = $Y2;
  }

  /* Return the width of the picture */
  function getWidth() {
    return $this->XSize;
  }

  /* Return the heigth of the picture */
  function getHeight() {
    return $this->YSize;
  }

  /* Render the picture to a file */
  function render($FileName) {
    if ($this->TransparentBackground) {
      imagealphablending($this->Picture, false);
      imagesavealpha($this->Picture, true);
    }
    imagepng($this->Picture, $FileName);
  }

  /* Render the picture to a web browser stream */
  function stroke($BrowserExpire = FALSE) {
    if ($this->TransparentBackground) {
      imagealphablending($this->Picture, false);
      imagesavealpha($this->Picture, true);
    }
    if ($BrowserExpire) {
      header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
      header("Cache-Control: no-cache");
      header("Pragma: no-cache");
    }
    header('Content-type: image/png');
    imagepng($this->Picture);
  }

  /* Automatic output method based on the calling interface */
  function autoOutput($FileName = "output.png") {
    if (php_sapi_name() == "cli") {
      $this
        ->Render($FileName);
    }
    else {
      $this
        ->Stroke();
    }
  }

  /* Return the length between two points */
  function getLength($X1, $Y1, $X2, $Y2) {
    return sqrt(pow(max($X1, $X2) - min($X1, $X2), 2) + pow(max($Y1, $Y2) - min($Y1, $Y2), 2));
  }

  /* Return the orientation of a line */
  function getAngle($X1, $Y1, $X2, $Y2) {
    $Opposite = $Y2 - $Y1;
    $Adjacent = $X2 - $X1;
    $Angle = rad2deg(atan2($Opposite, $Adjacent));
    if ($Angle > 0) {
      return $Angle;
    }
    else {
      return 360 - abs($Angle);
    }
  }

  /* Return the surrounding box of text area */
  function getTextBox_deprecated($X, $Y, $FontName, $FontSize, $Angle, $Text) {
    $Size = imagettfbbox($FontSize, $Angle, $FontName, $Text);
    $Width = $this
      ->getLength($Size[0], $Size[1], $Size[2], $Size[3]) + 1;
    $Height = $this
      ->getLength($Size[2], $Size[3], $Size[4], $Size[5]) + 1;
    $RealPos[0]["X"] = $X;
    $RealPos[0]["Y"] = $Y;
    $RealPos[1]["X"] = cos((360 - $Angle) * PI / 180) * $Width + $RealPos[0]["X"];
    $RealPos[1]["Y"] = sin((360 - $Angle) * PI / 180) * $Width + $RealPos[0]["Y"];
    $RealPos[2]["X"] = cos((270 - $Angle) * PI / 180) * $Height + $RealPos[1]["X"];
    $RealPos[2]["Y"] = sin((270 - $Angle) * PI / 180) * $Height + $RealPos[1]["Y"];
    $RealPos[3]["X"] = cos((180 - $Angle) * PI / 180) * $Width + $RealPos[2]["X"];
    $RealPos[3]["Y"] = sin((180 - $Angle) * PI / 180) * $Width + $RealPos[2]["Y"];
    $RealPos[TEXT_ALIGN_BOTTOMLEFT]["X"] = $RealPos[0]["X"];
    $RealPos[TEXT_ALIGN_BOTTOMLEFT]["Y"] = $RealPos[0]["Y"];
    $RealPos[TEXT_ALIGN_BOTTOMRIGHT]["X"] = $RealPos[1]["X"];
    $RealPos[TEXT_ALIGN_BOTTOMRIGHT]["Y"] = $RealPos[1]["Y"];
    return $RealPos;
  }

  /* Return the surrounding box of text area */
  function getTextBox($X, $Y, $FontName, $FontSize, $Angle, $Text) {
    $coords = imagettfbbox($FontSize, 0, $FontName, $Text);
    $a = deg2rad($Angle);
    $ca = cos($a);
    $sa = sin($a);
    $RealPos = array();
    for ($i = 0; $i < 7; $i += 2) {
      $RealPos[$i / 2]["X"] = $X + round($coords[$i] * $ca + $coords[$i + 1] * $sa);
      $RealPos[$i / 2]["Y"] = $Y + round($coords[$i + 1] * $ca - $coords[$i] * $sa);
    }
    $RealPos[TEXT_ALIGN_BOTTOMLEFT]["X"] = $RealPos[0]["X"];
    $RealPos[TEXT_ALIGN_BOTTOMLEFT]["Y"] = $RealPos[0]["Y"];
    $RealPos[TEXT_ALIGN_BOTTOMRIGHT]["X"] = $RealPos[1]["X"];
    $RealPos[TEXT_ALIGN_BOTTOMRIGHT]["Y"] = $RealPos[1]["Y"];
    $RealPos[TEXT_ALIGN_TOPLEFT]["X"] = $RealPos[3]["X"];
    $RealPos[TEXT_ALIGN_TOPLEFT]["Y"] = $RealPos[3]["Y"];
    $RealPos[TEXT_ALIGN_TOPRIGHT]["X"] = $RealPos[2]["X"];
    $RealPos[TEXT_ALIGN_TOPRIGHT]["Y"] = $RealPos[2]["Y"];
    $RealPos[TEXT_ALIGN_BOTTOMMIDDLE]["X"] = ($RealPos[1]["X"] - $RealPos[0]["X"]) / 2 + $RealPos[0]["X"];
    $RealPos[TEXT_ALIGN_BOTTOMMIDDLE]["Y"] = ($RealPos[0]["Y"] - $RealPos[1]["Y"]) / 2 + $RealPos[1]["Y"];
    $RealPos[TEXT_ALIGN_TOPMIDDLE]["X"] = ($RealPos[2]["X"] - $RealPos[3]["X"]) / 2 + $RealPos[3]["X"];
    $RealPos[TEXT_ALIGN_TOPMIDDLE]["Y"] = ($RealPos[3]["Y"] - $RealPos[2]["Y"]) / 2 + $RealPos[2]["Y"];
    $RealPos[TEXT_ALIGN_MIDDLELEFT]["X"] = ($RealPos[0]["X"] - $RealPos[3]["X"]) / 2 + $RealPos[3]["X"];
    $RealPos[TEXT_ALIGN_MIDDLELEFT]["Y"] = ($RealPos[0]["Y"] - $RealPos[3]["Y"]) / 2 + $RealPos[3]["Y"];
    $RealPos[TEXT_ALIGN_MIDDLERIGHT]["X"] = ($RealPos[1]["X"] - $RealPos[2]["X"]) / 2 + $RealPos[2]["X"];
    $RealPos[TEXT_ALIGN_MIDDLERIGHT]["Y"] = ($RealPos[1]["Y"] - $RealPos[2]["Y"]) / 2 + $RealPos[2]["Y"];
    $RealPos[TEXT_ALIGN_MIDDLEMIDDLE]["X"] = ($RealPos[1]["X"] - $RealPos[3]["X"]) / 2 + $RealPos[3]["X"];
    $RealPos[TEXT_ALIGN_MIDDLEMIDDLE]["Y"] = ($RealPos[0]["Y"] - $RealPos[2]["Y"]) / 2 + $RealPos[2]["Y"];
    return $RealPos;
  }

  /* Set current font properties */
  function setFontProperties($Format = "") {
    $R = isset($Format["R"]) ? $Format["R"] : -1;
    $G = isset($Format["G"]) ? $Format["G"] : -1;
    $B = isset($Format["B"]) ? $Format["B"] : -1;
    $Alpha = isset($Format["Alpha"]) ? $Format["Alpha"] : 100;
    $FontName = isset($Format["FontName"]) ? $Format["FontName"] : NULL;
    $FontSize = isset($Format["FontSize"]) ? $Format["FontSize"] : NULL;
    if ($R != -1) {
      $this->FontColorR = $R;
    }
    if ($G != -1) {
      $this->FontColorG = $G;
    }
    if ($B != -1) {
      $this->FontColorB = $B;
    }
    if ($Alpha != NULL) {
      $this->FontColorA = $Alpha;
    }
    if ($FontName != NULL) {
      $this->FontName = $FontName;
    }
    if ($FontSize != NULL) {
      $this->FontSize = $FontSize;
    }
  }

  /* Returns the 1st decimal values (used to correct AA bugs) */
  function getFirstDecimal($Value) {
    $Values = preg_split("/\\./", $Value);
    if (isset($Values[1])) {
      return substr($Values[1], 0, 1);
    }
    else {
      return 0;
    }
  }

  /* Attach a dataset to your pChart Object */
  function setDataSet(&$DataSet) {
    $this->DataSet = $DataSet;
  }

  /* Print attached dataset contents to STDOUT */
  function printDataSet() {
    print_r($this->DataSet);
  }

  /* Initialise the image map methods */
  function initialiseImageMap($Name = "pChart", $StorageMode = IMAGE_MAP_STORAGE_SESSION, $UniqueID = "imageMap", $StorageFolder = "tmp") {
    $this->ImageMapIndex = $Name;
    $this->ImageMapStorageMode = $StorageMode;
    if ($StorageMode == IMAGE_MAP_STORAGE_SESSION) {
      if (!isset($_SESSION)) {
        session_start();
      }
      $_SESSION[$this->ImageMapIndex] = NULL;
    }
    elseif ($StorageMode == IMAGE_MAP_STORAGE_FILE) {
      $this->ImageMapFileName = $UniqueID;
      $this->ImageMapStorageFolder = $StorageFolder;
      if (file_exists($StorageFolder . "/" . $UniqueID . ".map")) {
        unlink($StorageFolder . "/" . $UniqueID . ".map");
      }
    }
  }

  /* Add a zone to the image map */
  function addToImageMap($Type, $Plots, $Color = NULL, $Title = NULL, $Message = NULL, $HTMLEncode = FALSE) {
    if ($this->ImageMapStorageMode == NULL) {
      $this
        ->initialiseImageMap();
    }

    /* Encode the characters in the imagemap in HTML standards */
    $Title = str_replace("&#8364;", "\\u20AC", $Title);
    $Title = htmlentities($Title, ENT_QUOTES, "ISO-8859-15");
    if ($HTMLEncode) {
      $Message = htmlentities($Message, ENT_QUOTES, "ISO-8859-15");
      $Message = str_replace("&lt;", "<", $Message);
      $Message = str_replace("&gt;", ">", $Message);
    }
    if ($this->ImageMapStorageMode == IMAGE_MAP_STORAGE_SESSION) {
      if (!isset($_SESSION)) {
        $this
          ->initialiseImageMap();
      }
      $_SESSION[$this->ImageMapIndex][] = array(
        $Type,
        $Plots,
        $Color,
        $Title,
        $Message,
      );
    }
    elseif ($this->ImageMapStorageMode == IMAGE_MAP_STORAGE_FILE) {
      $Handle = fopen($this->ImageMapStorageFolder . "/" . $this->ImageMapFileName . ".map", 'a');
      fwrite($Handle, $Type . IMAGE_MAP_DELIMITER . $Plots . IMAGE_MAP_DELIMITER . $Color . IMAGE_MAP_DELIMITER . $Title . IMAGE_MAP_DELIMITER . $Message . "\r\n");
      fclose($Handle);
    }
  }

  /* Remove VOID values from an imagemap custom values array */
  function removeVOIDFromArray($SerieName, $Values) {
    if (!isset($this->DataSet->Data["Series"][$SerieName])) {
      return -1;
    }
    $Result = "";
    foreach ($this->DataSet->Data["Series"][$SerieName]["Data"] as $Key => $Value) {
      if ($Value != VOID && isset($Values[$Key])) {
        $Result[] = $Values[$Key];
      }
    }
    return $Result;
  }

  /* Replace the title of one image map serie */
  function replaceImageMapTitle($OldTitle, $NewTitle) {
    if ($this->ImageMapStorageMode == NULL) {
      return -1;
    }
    if (is_array($NewTitle)) {
      $NewTitle = $this
        ->removeVOIDFromArray($OldTitle, $NewTitle);
    }
    if ($this->ImageMapStorageMode == IMAGE_MAP_STORAGE_SESSION) {
      if (!isset($_SESSION)) {
        return -1;
      }
      if (is_array($NewTitle)) {
        $ID = 0;
        foreach ($_SESSION[$this->ImageMapIndex] as $Key => $Settings) {
          if ($Settings[3] == $OldTitle && isset($NewTitle[$ID])) {
            $_SESSION[$this->ImageMapIndex][$Key][3] = $NewTitle[$ID];
            $ID++;
          }
        }
      }
      else {
        foreach ($_SESSION[$this->ImageMapIndex] as $Key => $Settings) {
          if ($Settings[3] == $OldTitle) {
            $_SESSION[$this->ImageMapIndex][$Key][3] = $NewTitle;
          }
        }
      }
    }
    elseif ($this->ImageMapStorageMode == IMAGE_MAP_STORAGE_FILE) {
      $TempArray = "";
      $Handle = @fopen($this->ImageMapStorageFolder . "/" . $this->ImageMapFileName . ".map", "r");
      if ($Handle) {
        while (($Buffer = fgets($Handle, 4096)) !== false) {
          $Fields = preg_split("/" . IMAGE_MAP_DELIMITER . "/", str_replace(array(
            chr(10),
            chr(13),
          ), "", $Buffer));
          $TempArray[] = array(
            $Fields[0],
            $Fields[1],
            $Fields[2],
            $Fields[3],
            $Fields[4],
          );
        }
        fclose($Handle);
        if (is_array($NewTitle)) {
          $ID = 0;
          foreach ($TempArray as $Key => $Settings) {
            if ($Settings[3] == $OldTitle && isset($NewTitle[$ID])) {
              $TempArray[$Key][3] = $NewTitle[$ID];
              $ID++;
            }
          }
        }
        else {
          foreach ($TempArray as $Key => $Settings) {
            if ($Settings[3] == $OldTitle) {
              $TempArray[$Key][3] = $NewTitle;
            }
          }
        }
        $Handle = fopen($this->ImageMapStorageFolder . "/" . $this->ImageMapFileName . ".map", 'w');
        foreach ($TempArray as $Key => $Settings) {
          fwrite($Handle, $Settings[0] . IMAGE_MAP_DELIMITER . $Settings[1] . IMAGE_MAP_DELIMITER . $Settings[2] . IMAGE_MAP_DELIMITER . $Settings[3] . IMAGE_MAP_DELIMITER . $Settings[4] . "\r\n");
        }
        fclose($Handle);
      }
    }
  }

  /* Replace the values of the image map contents */
  function replaceImageMapValues($Title, $Values) {
    if ($this->ImageMapStorageMode == NULL) {
      return -1;
    }
    $Values = $this
      ->removeVOIDFromArray($Title, $Values);
    $ID = 0;
    if ($this->ImageMapStorageMode == IMAGE_MAP_STORAGE_SESSION) {
      if (!isset($_SESSION)) {
        return -1;
      }
      foreach ($_SESSION[$this->ImageMapIndex] as $Key => $Settings) {
        if ($Settings[3] == $Title) {
          if (isset($Values[$ID])) {
            $_SESSION[$this->ImageMapIndex][$Key][4] = $Values[$ID];
          }
          $ID++;
        }
      }
    }
    elseif ($this->ImageMapStorageMode == IMAGE_MAP_STORAGE_FILE) {
      $TempArray = "";
      $Handle = @fopen($this->ImageMapStorageFolder . "/" . $this->ImageMapFileName . ".map", "r");
      if ($Handle) {
        while (($Buffer = fgets($Handle, 4096)) !== false) {
          $Fields = preg_split("/" . IMAGE_MAP_DELIMITER . "/", str_replace(array(
            chr(10),
            chr(13),
          ), "", $Buffer));
          $TempArray[] = array(
            $Fields[0],
            $Fields[1],
            $Fields[2],
            $Fields[3],
            $Fields[4],
          );
        }
        fclose($Handle);
        foreach ($TempArray as $Key => $Settings) {
          if ($Settings[3] == $Title) {
            if (isset($Values[$ID])) {
              $TempArray[$Key][4] = $Values[$ID];
            }
            $ID++;
          }
        }
        $Handle = fopen($this->ImageMapStorageFolder . "/" . $this->ImageMapFileName . ".map", 'w');
        foreach ($TempArray as $Key => $Settings) {
          fwrite($Handle, $Settings[0] . IMAGE_MAP_DELIMITER . $Settings[1] . IMAGE_MAP_DELIMITER . $Settings[2] . IMAGE_MAP_DELIMITER . $Settings[3] . IMAGE_MAP_DELIMITER . $Settings[4] . "\r\n");
        }
        fclose($Handle);
      }
    }
  }

  /* Dump the image map */
  function dumpImageMap($Name = "pChart", $StorageMode = IMAGE_MAP_STORAGE_SESSION, $UniqueID = "imageMap", $StorageFolder = "tmp") {
    $this->ImageMapIndex = $Name;
    $this->ImageMapStorageMode = $StorageMode;
    if ($this->ImageMapStorageMode == IMAGE_MAP_STORAGE_SESSION) {
      if (!isset($_SESSION)) {
        session_start();
      }
      if ($_SESSION[$Name] != NULL) {
        foreach ($_SESSION[$Name] as $Key => $Params) {
          echo $Params[0] . IMAGE_MAP_DELIMITER . $Params[1] . IMAGE_MAP_DELIMITER . $Params[2] . IMAGE_MAP_DELIMITER . $Params[3] . IMAGE_MAP_DELIMITER . $Params[4] . "\r\n";
        }
      }
    }
    elseif ($this->ImageMapStorageMode == IMAGE_MAP_STORAGE_FILE) {
      if (file_exists($StorageFolder . "/" . $UniqueID . ".map")) {
        $Handle = @fopen($StorageFolder . "/" . $UniqueID . ".map", "r");
        if ($Handle) {
          while (($Buffer = fgets($Handle, 4096)) !== false) {
            echo $Buffer;
          }
        }
        fclose($Handle);
        if ($this->ImageMapAutoDelete) {
          unlink($StorageFolder . "/" . $UniqueID . ".map");
        }
      }
    }

    /* When the image map is returned to the client, the script ends */
    exit;
  }

  /* Return the HTML converted color from the RGB composite values */
  function toHTMLColor($R, $G, $B) {
    $R = intval($R);
    $G = intval($G);
    $B = intval($B);
    $R = dechex($R < 0 ? 0 : ($R > 255 ? 255 : $R));
    $G = dechex($G < 0 ? 0 : ($G > 255 ? 255 : $G));
    $B = dechex($B < 0 ? 0 : ($B > 255 ? 255 : $B));
    $Color = "#" . (strlen($R) < 2 ? '0' : '') . $R;
    $Color .= (strlen($G) < 2 ? '0' : '') . $G;
    $Color .= (strlen($B) < 2 ? '0' : '') . $B;
    return $Color;
  }

  /* Reverse an array of points */
  function reversePlots($Plots) {
    $Result = "";
    for ($i = count($Plots) - 2; $i >= 0; $i = $i - 2) {
      $Result[] = $Plots[$i];
      $Result[] = $Plots[$i + 1];
    }
    return $Result;
  }

  /* Mirror Effect */
  function drawAreaMirror($X, $Y, $Width, $Height, $Format = "") {
    $StartAlpha = isset($Format["StartAlpha"]) ? $Format["StartAlpha"] : 80;
    $EndAlpha = isset($Format["EndAlpha"]) ? $Format["EndAlpha"] : 0;
    $AlphaStep = ($StartAlpha - $EndAlpha) / $Height;
    $Picture = imagecreatetruecolor($this->XSize, $this->YSize);
    imagecopy($Picture, $this->Picture, 0, 0, 0, 0, $this->XSize, $this->YSize);
    for ($i = 1; $i <= $Height; $i++) {
      if ($Y + ($i - 1) < $this->YSize && $Y - $i > 0) {
        imagecopymerge($Picture, $this->Picture, $X, $Y + ($i - 1), $X, $Y - $i, $Width, 1, $StartAlpha - $AlphaStep * $i);
      }
    }
    imagecopy($this->Picture, $Picture, 0, 0, 0, 0, $this->XSize, $this->YSize);
  }

}
Constants

Name	Description
CHART_LAST_LAYOUT_REGULAR
CHART_LAST_LAYOUT_STACKED
IMAGE_MAP_DELIMITER
IMAGE_MAP_STORAGE_FILE
IMAGE_MAP_STORAGE_SESSION
Classes

Name	Description
pImage
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