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Diffstat (limited to 'misc/openlayers/examples/kamap.txt')
| -rw-r--r-- | misc/openlayers/examples/kamap.txt | 508 |
1 files changed, 0 insertions, 508 deletions
diff --git a/misc/openlayers/examples/kamap.txt b/misc/openlayers/examples/kamap.txt deleted file mode 100644 index 50fa4e0..0000000 --- a/misc/openlayers/examples/kamap.txt +++ /dev/null @@ -1,508 +0,0 @@ -<?php -/* - -This is a PHP file to be used as a backend for a ka-Map layer. It requires -PHP with Mapscript and libgd modules installed. The top of the file -is a configuration section: please edit the variables in this configuration -section to meet your needs, then rename this file to tile.php or something -similar and put it in a web accessible directory. More information -on the OpenLayers ka-Map layer is available from: - - http://trac.openlayers.org/wiki/OpenLayers.Layer.KaMap - -*/ -/********************************************************************** - * - * $Id: tile.php,v 1.33 2006/02/07 03:19:55 pspencer Exp $ - * - * purpose: a simple phpmapscript-based tile renderer that implements - * rudimentary caching for reasonable efficiency. Note the - * cache never shrinks in this version so your disk could - * easily fill up! - * - * author: Paul Spencer (pspencer@dmsolutions.ca) - * - * modifications by Daniel Morissette (dmorissette@dmsolutions.ca) - * - * Modified by Christopher Schmidt for OpenLayers redistribution. - * - ********************************************************************** - * - * Copyright (c) 2005, DM Solutions Group Inc. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING - * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER - * DEALINGS IN THE SOFTWARE. - * - **********************************************************************/ - - -/****************************************************************************** - * basic system configuration - * - * kaMap! uses PHP/MapScript and the PHP GD extension to - * render tiles, and uses PHP/MapScript to generate initialization parameters - * a legend, and a keymap from the selected map file. - * - * Make sure to set the correct module names for your PHP extensions. - * - * WINDOWS USERS: you will likely need to use php_gd2.dll instead of php_gd.dll - */ -$szPHPMapScriptModule = 'php_mapscript.'.PHP_SHLIB_SUFFIX; -$szPHPGDModule = 'php_gd.'.PHP_SHLIB_SUFFIX; - -/****************************************************************************** - * tile generation parameters - * - * kaMap! generates tiles to load in the client application by first rendering - * larger areas from the map file and then slicing them up into smaller tiles. - * This approach reduces the overhead of loading PHP/MapScript and PHP GD and - * drawing the map file. These larger areas are referred to as metaTiles in - * the code. You can set the size of both the small tiles and the metaTiles - * here. A reasonable size for the small tiles seems to be 200 pixels square. - * Smaller tiles seem to cause problems in client browsers by causing too many - * images to be created and thus slowing performance of live dragging. Larger - * tiles take longer to download to the client and are inefficient. - * - * The number of smaller tiles that form a metaTile can also be configured. - * This parameter allows tuning of the tile generator to ensure optimal - * performance and for label placement. MapServer will produce labels only - * within a rendered area. If the area is too small then features may be - * labelled multiple times. If the area is too large, it may exceed MapServer,s - * maximum map size (by default 2000x2000) or be too resource-intensive on the - * server, ultimately reducing performance. - */ -$tileWidth = 256; -$tileHeight = 256; -$metaWidth = 5; -$metaHeight = 5; -/* $metaBuffer = Buffer size in pixels to add around metatiles to avoid - * rendering issues along the edge of the map image - */ -$metaBuffer = 10; - -/****************************************************************************** - * in-image debugging information - tile location, outlines etc. - * to use this, you need to remove images from your cache first. This also - * affects the meta tiles - if debug is on, they are not deleted. - */ -$bDebug = false; - -/****************************************************************************** - * aszMapFiles - an array of map files available to the application. How this - * is used is determined by the application. Each map file is entered into - * this array as a key->value pair. - * - * The key is the name to be used by the tile caching system to store cached - * tiles within the base cache directory. This key should be a single word - * that uniquely identifies the map. - * - * The value associated with each key is an array of three values. The first - * value is a human-readable name to be presented to the user (should the - * application choose to do so) and the second value is the path to the map - * file. It is assumed that the map file is fully configured for use with - * MapServer/MapScript as no error checking or setting of values is done. The - * third value is an array of scale values for zooming. - */ - -$aszMapFiles = array( - "world" => array( "World", "/path/to/your/mapfile", - array( 10000 ), # in openlayers, the scale array doesn't matter. - "PNG24") - -/* Add more elements to this array to offer multiple mapfiles */ - -); - -/****************************************************************************** - * figure out which map file to use and set up the necessary variables for - * the rest of the code to use. This does need to be done on every page load - * unfortunately. - * - * szMap should be set to the default map file to use but can change if - * this script is called with map=<mapname>. - */ -$szMap = 'world'; - -/****************************************************************************** - * kaMap! caching - * - * this is the directory within which kaMap! will create its tile cache. The - * directory does NOT have to be web-accessible, but it must be writable by the - * web-server-user and allow creation of both directories AND files. - * - * the tile caching system will create a separate subdirectory within the base - * cache directory for each map file. Within the cache directory for each map - * file, directories will be created for each group of layers. Within the group - * directories, directories will be created at each of the configured scales - * for the application (see mapfile configuration above.) - */ -$szBaseCacheDir = "/var/cache/kamap/"; - -/***** END OF CONFIGURABLE STUFF - unless you know what you are doing *****/ -/***** *****/ -/***** *****/ -/***** *****/ -/***** END OF CONFIGURABLE STUFF - unless you know what you are doing *****/ - -if (isset($_REQUEST['map']) && isset($aszMapFiles[$_REQUEST['map']])) -{ - $szMap = $_REQUEST['map']; -} - -$szMapCacheDir = $szBaseCacheDir.$szMap."/"; -$szMapName = $aszMapFiles[$szMap][0]; -$szMapFile = $aszMapFiles[$szMap][1]; -$anScales = $aszMapFiles[$szMap][2]; -setOutputFormat($aszMapFiles[$szMap][3]); -/****************************************************************************** - * output format of the map and resulting tiles - * - * The output format used with MapServer can greatly affect appearance and - * performance. It is recommended to use an 8 bit format such as PNG - * - * NOTE: the tile caching code in tile.php is not configurable here. It - * currently assumes that it is outputting 8bit PNG files. If you change to - * PNG24 here then you will need to update tile.php to use the gd function - * imagecreatetruecolor. If you change the output format to jpeg then - * you would need to change imagepng() to imagejpeg(). A nice enhancement - * would be to make that fully configurable from here. - */ -function setOutputFormat($szFormat) -{ - switch($szFormat) { - case "PNG24": - $GLOBALS['szMapImageFormat'] = 'PNG24'; //mapscript format name - $GLOBALS['szMapImageCreateFunction'] = "imagecreatefrompng"; // appropriate GD function - $GLOBALS['szImageExtension'] = '.png'; //file extension - $GLOBALS['szImageCreateFunction'] = "imagecreatetruecolor"; //or imagecreatetruecolor if PNG24 ... - $GLOBALS['szImageOutputFunction'] = "imagepng"; //or imagegif, imagejpeg ... - $GLOBALS['szImageHeader'] = 'image/png'; //the content-type of the image - break; - case "GIF": - $GLOBALS['szMapImageFormat'] = 'GIF'; //mapscript format name - $GLOBALS['szMapImageCreateFunction'] = "imagecreatefromgif"; // appropriate GD function - $GLOBALS['szImageExtension'] = '.gif'; //file extension - $GLOBALS['szImageCreateFunction'] = "imagecreate"; //or imagecreatetruecolor if PNG24 ... - $GLOBALS['szImageOutputFunction'] = "imagegif"; //or imagegif, imagejpeg ... - $GLOBALS['szImageHeader'] = 'image/gif'; //the content-type of the image - break; - case "JPEG": - $GLOBALS['szMapImageFormat'] = 'JPEG'; //mapscript format name - $GLOBALS['szMapImageCreateFunction'] = "imagecreatefromjpeg"; // appropriate GD function - $GLOBALS['szImageExtension'] = '.jpg'; //file extension - $GLOBALS['szImageCreateFunction'] = "imagecreatetruecolor"; //or imagecreatetruecolor if PNG24 ... - $GLOBALS['szImageOutputFunction'] = "imagejpeg"; //or imagegif, imagejpeg ... - $GLOBALS['szImageHeader'] = 'image/jpeg'; //the content-type of the image - break; - case "PNG": - $GLOBALS['szMapImageFormat'] = 'PNG'; //mapscript format name - $GLOBALS['szMapImageCreateFunction'] = "imagecreatefrompng"; // appropriate GD function - $GLOBALS['szImageExtension'] = '.png'; //file extension - $GLOBALS['szImageCreateFunction'] = "imagecreate"; //or imagecreatetruecolor if PNG24 ... - $GLOBALS['szImageOutputFunction'] = "imagepng"; //or imagegif, imagejpeg ... - $GLOBALS['szImageHeader'] = 'image/png'; //the content-type of the image - break; - case "DITHERED": - case "PNG8": - $GLOBALS['szMapImageFormat'] = 'dithered'; - $GLOBALS['szMapImageCreateFunction'] = "imagecreatefrompng"; - $GLOBALS['szImageExtension'] = '.png'; - $GLOBALS['szImageCreateFunction'] = "imagecreate"; - $GLOBALS['szImageOutputFunction'] = "imagepng"; - $GLOBALS['szImageHeader'] = 'image/png'; - break; - } -} - -/** - * create all directories in a directory tree - found on the php web site - * under the mkdir function ... - */ -function makeDirs($strPath, $mode = 0775) -{ - return is_dir($strPath) or ( makeDirs(dirname($strPath), $mode) and mkdir($strPath, $mode) ); -} - -/** - * This function replaces all special characters in the given string. - * - * @param szString string - The string to convert. - * - * @return string converted - */ -function normalizeString($szString) -{ - // Normalize string by replacing all special characters - // e.g. "http://my.host.com/cgi-bin/mywms?" - // becomes "http___my_host_com_cgi_bin_mywms_" - return preg_replace("/(\W)/", "_", $szString); -} - -/* bug 1253 - root permissions required to delete cached files */ -$orig_umask = umask(0); - -/* create the main cache directory if necessary */ -if (!@is_dir($szMapCacheDir)) - makeDirs($szMapCacheDir); - -/* get the various request parameters - * also need to make sure inputs are clean, especially those used to - * build paths and filenames - */ - /* - * the tile renderer accepts several parameters and returns a tile image from - * the cache, creating the tile only if necessary. - * - * all requests include the pixel location of the request at a certain scale - * and this script figures out the geographic location of the tile from the - * scale assuming that 0,0 in pixels is 0,0 in geographic units - * - * Request parameters are: - * - * map: the name of the map to use. This is handled by config.php. - * - * t: top pixel position - * l: left pixel position - * s: scale - * g: (optional) comma-delimited list of group names to draw - * layers: (optional) comma-delimited list of layers to draw - * force: optional. If set, force redraw of the meta tile. This was added to - * help with invalid images sometimes being generated. - * tileid: (optional) can be used instead of t+l to specify the tile coord., - * useful in regenerating the cache - */ - -$top = isset( $_REQUEST['t'] ) ? intval($_REQUEST['t']) : 0; -$left = isset( $_REQUEST['l'] ) ? intval($_REQUEST['l']) : 0; -$scale = isset( $_REQUEST['s'] ) ? $_REQUEST['s'] : $anScales[0]; -$bForce = isset($_REQUEST['force'])? true : false; -$groups = isset( $_REQUEST['g'] ) ? $_REQUEST['g'] : ""; -$layers = isset( $_REQUEST['layers'] ) ? $_REQUEST['layers'] : ""; - -// dynamic imageformat ---------------------------------------------- -//use the function in config.php to set the output format -if (isset($_REQUEST['i'])) - setOutputFormat( $_REQUEST['i'] ); -//---------------------------------------------------------------- - -/* tileid=t#####l#### can be used instead of t+l parameters. Useful in - * regenerating the cache for instance. - */ -if (isset( $_REQUEST['tileid']) && - preg_match("/t(-?\d+)l(-?\d+)/", $_REQUEST['tileid'], $aMatch) ) -{ - $top = intval($aMatch[1]); - $left = intval($aMatch[2]); -} - -/* Calculate the metatile's top-left corner coordinates. - * Include the $metaBuffer around the metatile to account for various - * rendering issues happening around the edge of a map - */ -$metaLeft = floor( ($left)/($tileWidth*$metaWidth) ) * $tileWidth * $metaWidth; -$metaTop = floor( ($top)/($tileHeight*$metaHeight) ) * $tileHeight *$metaHeight; -$szMetaTileId = "t".$metaTop."l".$metaLeft; -$metaLeft -= $metaBuffer; -$metaTop -= $metaBuffer; - -/* caching is done by scale value, then groups and layers and finally metatile - * and tile id. Create a new directory if necessary - */ -$szGroupDir = $groups != "" ? normalizeString($groups) : "def"; -$szLayerDir = $layers != "" ? normalizeString($layers) : "def"; - -$szCacheDir = $szMapCacheDir."/".$scale."/".$szGroupDir."/".$szLayerDir."/".$szMetaTileId; -if (!@is_dir($szCacheDir)) - makeDirs($szCacheDir); - -/* resolve cache hit - clear the os stat cache if necessary */ -$szTileId = "t".$top."l".$left; -$szCacheFile = $szCacheDir."/".$szTileId.$szImageExtension; -clearstatcache(); - -$szMetaDir = $szCacheDir."/meta"; -if (!@is_Dir($szMetaDir)) - makeDirs($szMetaDir); - -/* simple locking in case there are several requests for the same meta - tile at the same time - only draw it once to help with performance */ -$szLockFile = $szMetaDir."/lock_".$metaTop."_".$metaLeft; -$fpLockFile = fopen($szLockFile, "a+"); -clearstatcache(); -if (!file_exists($szCacheFile) || $bForce) -{ - flock($fpLockFile, LOCK_EX); - fwrite($fpLockFile, "."); - - //check once more to see if the cache file was created while waiting for - //the lock - clearstatcache(); - if (!file_exists($szCacheFile) || $bForce) - { - if (!extension_loaded('MapScript')) - { - dl( $szPHPMapScriptModule ); - } - if (!extension_loaded('gd')) - { - dl( $szPHPGDModule); - } - - if (!@is_Dir($szMetaDir)) - makeDirs($szMetaDir); - - $oMap = ms_newMapObj($szMapFile); - - /* Metatile width/height include 2x the metaBuffer value */ - $oMap->set('width', $tileWidth * $metaWidth + 2*$metaBuffer); - $oMap->set('height', $tileHeight * $metaHeight + 2*$metaBuffer); - - /* Tell MapServer to not render labels inside the metaBuffer area - * (new in 4.6) - * TODO: Until MapServer bugs 1353/1355 are resolved, we need to - * pass a negative value for "labelcache_map_edge_buffer" - */ - $oMap->setMetadata("labelcache_map_edge_buffer", -$metaBuffer); - - $inchesPerUnit = array(1, 12, 63360.0, 39.3701, 39370.1, 4374754); - $geoWidth = $scale/($oMap->resolution*$inchesPerUnit[$oMap->units]); - $geoHeight = $scale/($oMap->resolution*$inchesPerUnit[$oMap->units]); - - /* draw the metatile */ - $minx = $metaLeft * $geoWidth; - $maxx = $minx + $geoWidth * $oMap->width; - $maxy = -1 * $metaTop * $geoHeight; - $miny = $maxy - $geoHeight * $oMap->height; - - $nLayers = $oMap->numlayers; - $oMap->setExtent($minx,$miny,$maxx,$maxy); - $oMap->selectOutputFormat( $szMapImageFormat ); - $aszLayers = array(); - if ($groups || $layers) - { - /* Draw only specified layers instead of default from mapfile*/ - if ($layers) - { - $aszLayers = explode(",", $layers); - } - - if ($groups) - { - $aszGroups = explode(",", $groups); - } - - for($i=0;$i<$nLayers;$i++) - { - $oLayer = $oMap->getLayer($i); - if (($aszGroups && in_array($oLayer->group,$aszGroups)) || - ($aszLayers && in_array($oLayer->name,$aszLayers)) || - ($aszGroups && $oLayer->group == '' && - in_array( "__base__", $aszGroups))) - { - $oLayer->set("status", MS_ON ); - } - else - { - $oLayer->set("status", MS_OFF ); - } - } - //need transparency if groups or layers are used - $oMap->outputformat->set("transparent", MS_ON ); - } - else - { - $oMap->outputformat->set("transparent", MS_OFF ); - } - - - $szMetaImg = $szMetaDir."/t".$metaTop."l".$metaLeft.$szImageExtension; - $oImg = $oMap->draw(); - $oImg->saveImage($szMetaImg); - $oImg->free(); - eval("\$oGDImg = ".$szMapImageCreateFunction."('".$szMetaImg."');"); - if ($bDebug) - { - $blue = imagecolorallocate($oGDImg, 0, 0, 255); - imagerectangle($oGDImg, 0, 0, $tileWidth * $metaWidth - 1, $tileHeight * $metaHeight - 1, $blue ); - } - for($i=0;$i<$metaWidth;$i++) - { - for ($j=0;$j<$metaHeight;$j++) - { - eval("\$oTile = ".$szImageCreateFunction."( ".$tileWidth.",".$tileHeight." );"); - // Allocate BG color for the tile (in case the metatile has transparent BG) - $nTransparent = imagecolorallocate($oTile, $oMap->imagecolor->red, $oMap->imagecolor->green, $oMap->imagecolor->blue); - //if ($oMap->outputformat->transparent == MS_ON) - //{ - imagecolortransparent( $oTile,$nTransparent); - //} - $tileTop = $j*$tileHeight + $metaBuffer; - $tileLeft = $i*$tileWidth + $metaBuffer; - imagecopy( $oTile, $oGDImg, 0, 0, $tileLeft, $tileTop, $tileWidth, $tileHeight ); - /* debugging stuff */ - if ($bDebug) - { - $black = imagecolorallocate($oTile, 1, 1, 1); - $green = imagecolorallocate($oTile, 0, 128, 0 ); - $red = imagecolorallocate($oTile, 255, 0, 0); - imagerectangle( $oTile, 1, 1, $tileWidth-2, $tileHeight-2, $green ); - imageline( $oTile, 0, $tileHeight/2, $tileWidth-1, $tileHeight/2, $red); - imageline( $oTile, $tileWidth/2, 0, $tileWidth/2, $tileHeight-1, $red); - imagestring ( $oTile, 3, 10, 10, ($metaLeft+$tileLeft)." x ".($metaTop+$tileTop), $black ); - imagestring ( $oTile, 3, 10, 30, ($minx+$i*$geoWidth)." x ".($maxy - $j*$geoHeight), $black ); - } - $szTileImg = $szCacheDir."/t".($metaTop+$tileTop)."l".($metaLeft+$tileLeft).$szImageExtension; - eval("$szImageOutputFunction( \$oTile, '".$szTileImg."' );"); - imagedestroy($oTile); - $oTile = null; - } - } - if ($oGDImg != null) - { - imagedestroy($oGDImg); - $oGDImg = null; - } - if (!$bDebug) - { - unlink( $szMetaImg ); - } - } - //release the exclusive lock - flock($fpLockFile, LOCK_UN ); -} - -//acquire shared lock for reading to prevent a problem that could occur -//if a tile exists but is only partially generated. -flock($fpLockFile, LOCK_SH); - -$h = fopen($szCacheFile, "r"); -header("Content-Type: ".$szImageHeader); -header("Content-Length: " . filesize($szCacheFile)); -header("Expires: " . date( "D, d M Y H:i:s GMT", time() + 31536000 )); -header("Cache-Control: max-age=31536000, must-revalidate" ); -fpassthru($h); -fclose($h); - -//release lock -fclose($fpLockFile); - -/* bug 1253 - root permissions required to delete cached files */ -umask($orig_umask); - -exit; -?> |