Legend.html

<?php
function createLegendGraphicRequest ($oLayer, $nScale, $nWidth=18, $nHeight=12)
{
/* required parameters: version, request, layer
 * uses width, height, version, sld_body, scale
 * sld,style,featuretype,rule,exceptions not used
 * format is png
 */
 	if ( !($sName = $oLayer->getmetadata("wms_name")) ) $sName = $oLayer->name;
        $szSLDBody = urlencode( $oLayer->getMetaData("wms_sld_body") );
        if ( trim($szSLDBody) != "" ) { $szSLDBody = "&SLD_BODY=".$szSLDBody; }
        $szSLDURL = urlencode( $oLayer->getMetaData("wms_sld_url") );
        if (trim($szSLDURL) == "" )
        {
          $szWMSStyle = $oLayer->getMetaData("wms_style");
          $szSLDURL = $oLayer->getMetaData("wms_style_".$szWMSStyle."_sld");
        }
        if ( trim($szSLDURL) != "" ) { $szSLDURL = "&SLD=".$szSLDURL; }
        // bartvde, dit anders oplossen, waarschijnlijk kijken naar wms_sld_body
 	//$sSLDBody = urlencode($oLayer->generateSLD());
 	
	//$request = trim($oLayer->connection)."&request=getlegendgraphic&scale=".$nScale."&width=".$nWidth."&height=".$nHeight;
        $request = trim($oLayer->connection)."&request=GetLegendGraphic&scale=".$nScale;
	$request .= "&version=1.1.1&layer=".$sName."&format=image/png".$szSLDBody.$szSLDURL;
	return $request;
}

function getTitle ($oLayer)
{
	// returns title for layer
 	if ($title = $oLayer->getmetadata("wms_title"))	return $title;
	else return $oLayer->name;
}

function createNewImage ($nWidth, $nHeight)
{
	// returns new blank image with size nWidth x nHeight
	$img = imagecreatetruecolor ($nWidth,$nHeight);
	$background = ImageColorAllocate ($img, 255, 255, 255);
	imagefill($img,0,0,$background);
	return ($img);
}

function createLegendImage ( $oMapSession, $aLayers=null, $nMaxHeight=1000, $nIconWidth=18, $nIconHeight=12, $nSpacing=5 )
{
	// output: image containing all the legendimages from getlegendgraphic-requests
	// input:
	// 	oMapSession is the map session ;-)
	// 	nMaxHeight is the max. height of the outputimage, this is only a HINT,
	// 	  if one of the getlegendgraphics is larger, the output image will be larger than nMaxHeight
	// 	nIconWidth, nIconHeight are used in the getlegendgraphic-request
	// 	nSpacing is the space between legendimages
	$oMap = $oMapSession->oMap;

	$aCurrentSize = array(0,0,0,0,0); // topleft X,Y, bottomright X,Y, total imageheight
	$aOrder = $oMap->getlayersdrawingorder();
	$nFontType = $_SESSION['gszCorePath']."/../etc/Vera.ttf";


	$aDontShow = array("ExpressionBuilderAnnotation", "LabelAnnotation", "MapNotesAnnotation");
	for ($x=count($aOrder); $x>0; $x--)
	{
		$oLayer = $oMap->getlayer($aOrder[$x-1]);
		if ( ($oLayer->status == MS_ON)
		     && (!$aLayers || in_array($oLayer->name,$aLayers) )
		     && (!in_array($oLayer->name,$aDontShow)) )
		{
			if ($oLayer->connectiontype == MS_WMS)
			{
                                include_once(COMMON."/http/HTTPClient.php");
                                $oHTTPClient = new HTTPClient("", 30);
                                $legendurl = $oLayer->getmetadata("wms_style_default_legendurl");
                                if ($legendurl != "")
                                {
                                  $aStyle = explode(" ", $legendurl);
                                  if (is_array($aStyle) && isset($aStyle[3]) && $aStyle[3] != "")
                                  {
                                    $sRequest = $aStyle[3];
                                    $mimeType = $aStyle[2];
                                    // overrule naar png ivm Ionic bug 
                                    // http://support.ionicsoft.com/index.php?pid=viewticket&id=7CEA3D
                                    if ($mimeType == 'application/octet_stream') $mimeType = 'image/png';
                                  }
                                  else
                                  {
              		            $sRequest = createLegendGraphicRequest($oLayer, $oMap->scale, $nIconWidth, $nIconHeight);
                                    $mimeType = 'image/png';
                                  }
                                }
                                else
                                {
                                    $sRequest = createLegendGraphicRequest($oLayer, $oMap->scale, $nIconWidth, $nIconHeight);
                                    $mimeType = 'image/png';
                                } 
                                if ($mimeType == 'image/png') $szFileExt = 'png';
                                if ($mimeType == 'image/gif') $szFileExt = 'gif';                         
                                $szFilename = tempnam($_SESSION['gszTmpPath'], "GetLegendGraphic".".".$szFileExt);
                                $fpOut = fopen($szFilename, 'w');
                                $oHTTPClient->doGET($sRequest, $fpOut);
                                //if ($img = @imagecreatefrompng($sRequest))
                                if ($mimeType == 'image/png')
                                {
                                  $img = @imagecreatefrompng($szFilename);
                                }
                                else if ($mimeType == 'image/gif')
                                {
                                  $img = @imagecreatefromgif($szFilename);                     
                                }
				if ($img)
                                {
					$sTitle = getTitle($oLayer);
					// set size titletext
					$aImageText = imagettfbbox ( 10, 0, $nFontType, $sTitle );
					$nTextWidth = $aImageText[2] - $aImageText[0]+$nSpacing;
//					$nTextHeight = $aImageText[1] - $aImageText[7];
					$nTextHeight = 18; // font is always the same, so just set this fixed

					// set Y (height)
					$aCurrentSize[1] = $aCurrentSize[3];
					$aCurrentSize[3] += ($nSizeY = imagesy($img)) + $nTextHeight + $nSpacing*2;
					if ($aCurrentSize[3] > $nMaxHeight)
					{
						if (($nSizeY+$nTextHeight+$nSpacing*2) > $nMaxHeight) $nMaxHeight = $nSizeY+$nTextHeight+$nSpacing*3;
						$aCurrentSize[0] = $aCurrentSize[2]+$nSpacing;
						$aCurrentSize[1] = 0;//$nSpacing;
						$aCurrentSize[2] += $nSpacing;
						$aCurrentSize[3] = $nSizeY + $nTextHeight + $nSpacing*2;
						$aCurrentSize[4] = $nMaxHeight;
					}
					else if ($aCurrentSize[4] < $nMaxHeight) $aCurrentSize[4] = $aCurrentSize[3];

					// set X (width)
					if ( ($nTextWidth)+($nSpacing /* *2 */ ) > $aCurrentSize[2]-$aCurrentSize[0] )
						$aCurrentSize[2] = $aCurrentSize[0] + $nTextWidth + $nSpacing;
					if ( ( $nSizeX = imagesx($img) )+($nSpacing*2 ) > $aCurrentSize[2]-$aCurrentSize[0] )
						$aCurrentSize[2] = $aCurrentSize[0] + $nSizeX + $nSpacing*2;

					// create new image
                                        // bartvde, 23-01-06, clean up first, otherwise lots of mem consumption!
                                        if ($leg_img) { imagedestroy($leg_img); }
					$leg_img = createNewImage($aCurrentSize[2],$aCurrentSize[4]);

					// get 'old' image and copy into new
					if ($old_img)
					{
						imagecopy($leg_img,$old_img ,0,0, 0,0 ,imagesx($old_img), imagesy($old_img));
						imagedestroy($old_img);
					}

					// copy current layer into image
					$black = ImageColorAllocate ($leg_img, 0, 0, 0);
					ImageTTFText ($leg_img, 10, 0, $aCurrentSize[0]+$nSpacing, $aCurrentSize[1]+$nSpacing+$nTextHeight, $black, $nFontType, $sTitle);
					imagecopy($leg_img, $img, $aCurrentSize[0]+$nSpacing, $aCurrentSize[1]+$nTextHeight+$nSpacing*2 , 0, 0, $nSizeX ,$nSizeY);
					imagedestroy($img);

					$old_img = createNewImage($aCurrentSize[2],$aCurrentSize[4]);
					imagecopy($old_img,$leg_img,0,0,0,0,$aCurrentSize[2],$aCurrentSize[4]);

				} // else geen img (geen ondersteuning getlegendgraphic?)
			} // else geen wms (toch titel tonen?)
		} // else niet tonen
	}
	return ($leg_img);
}

?>