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<?php |
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namespace Smindel\GIS\Control; |
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use SilverStripe\Control\Controller; |
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use SilverStripe\Core\Config\Config; |
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use SilverStripe\Security\Security; |
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use SilverStripe\Security\Permission; |
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use SilverStripe\ORM\DB; |
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use Smindel\GIS\GIS; |
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use Smindel\GIS\Service\Tile; |
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class WebMapTileService extends AbstractGISWebServiceController |
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{ |
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private static $url_handlers = array( |
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'$Model//$z/$x/$y' => 'handleAction', |
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); |
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/** |
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* Buffer in pixel by wich the tile box is enlarged, which is used for |
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* filtering the data. That's in orderer to include points from a bordering |
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* tile that was cut and that wouldn't be rendered in this tile in order to |
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* show a complete point. Use int as a uniform buffer around the current tile |
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* or a two values for left/right and top/bottom or four values for left, top, |
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* right and bottom. |
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* |
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* @var mixed |
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*/ |
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private static $tile_buffer = 5; |
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private static $tile_size = 256; |
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private static $wrap_date = true; |
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private static $cache_path = 'tile-cache'; |
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private static $cache_ttl = 0; |
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private static $default_style = [ |
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'gd' => [ |
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'backgroundcolor' => [0, 0, 0, 127], |
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'strokecolor' => [60, 60, 210, 0], |
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'fillcolor' => [60, 60, 210, 80], |
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'setthickness' => [2], |
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'pointradius' => 5, |
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], |
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'imagick' => [ |
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'StrokeOpacity' => 1, |
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'StrokeWidth' => 2, |
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'StrokeColor' => 'rgb(60,60,210)', |
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'FillColor' => 'rgba(60,60,210,.25)', |
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'PointRadius' => 5, |
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], |
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]; |
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2 |
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public function index($request) |
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{ |
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$model = $this->model = $this->getModel($request); |
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$config = $this->getConfig($model); |
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if ( |
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($cache = $config['cache_ttl'] ? sha1(json_encode($request->getVars())) : false) |
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&& ($age = $this->cacheAge($cache)) !== false |
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&& $config['cache_ttl'] > $age |
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) { |
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$response = $this->getResponse(); |
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$response->addHeader('Content-Type', 'image/png'); |
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$response->setBody($this->readCache($cache)); |
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return $response; |
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} |
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$renderer = Config::inst()->get($this->getModel($request), 'tile_renderer'); |
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$response = $this->$renderer($request); |
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if ($cache && $response->getStatusCode() == 200) { |
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$this->writeCache($cache, $response->getBody()); |
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} |
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return $response; |
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} |
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public function vector_renderer($request) |
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{ |
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$model = $this->model = $this->getModel($request); |
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$config = $this->getConfig($model); |
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$list = $this->getRecords($request); |
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$z = $request->param('z'); |
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$x = $request->param('x'); |
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$y = $request->param('y'); |
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$tileSize = $config['tile_size']; |
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$tile = Tile::create($z, $x, $y, $config['default_style'], $config['wrap_date'], $tileSize); |
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list($lon1, $lat1) = Tile::zxy2lonlat($z, $x, $y); |
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list($lon2, $lat2) = Tile::zxy2lonlat($z, $x + 1, $y + 1); |
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$geometryField = $config['geometry_field']; |
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$bufferSize = $config['tile_buffer']; |
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if (!is_array($bufferSize)) { |
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$bufferSize = array_fill(0, 4, $bufferSize); |
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} elseif (count($bufferSize) == 2) { |
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$bufferSize += $bufferSize; |
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} |
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$buffer = [ |
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($lon2 - $lon1) / $tileSize * $bufferSize[0], |
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($lat2 - $lat1) / $tileSize * $bufferSize[1], |
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($lon2 - $lon1) / $tileSize * $bufferSize[2], |
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($lat2 - $lat1) / $tileSize * $bufferSize[3], |
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]; |
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$boxes = [[ |
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[$lon1 - $buffer[0], $lat1 - $buffer[1]], |
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[$lon2 + $buffer[2], $lat1 - $buffer[1]], |
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[$lon2 + $buffer[2], $lat2 + $buffer[3]], |
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[$lon1 - $buffer[0], $lat2 + $buffer[3]], |
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[$lon1 - $buffer[0], $lat1 - $buffer[1]], |
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]]; |
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$bounds = [ |
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'type' => 'Polygon', |
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'srid' => 4326, |
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'coordinates' => $boxes, |
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]; |
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$list = $list->filter( |
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$geometryField . ':ST_Intersects', |
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GIS::array_to_ewkt( |
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GIS::reproject_array( |
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$bounds, |
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Config::inst()->get(GIS::class, 'default_srid') |
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) |
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) |
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); |
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if ($request->requestVar('debug')) { |
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$tile->debug("$z, $x, $y, " . $list->count()); |
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} |
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$response = $this->getResponse(); |
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$response->addHeader('Content-Type', $tile->getContentType()); |
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$response->setBody($tile->render($list)); |
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return $response; |
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} |
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public function raster_renderer($request) |
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{ |
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$model = $this->model = $this->getModel($request); |
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$config = $this->getConfig($model); |
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$raster = singleton($model); |
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$z = $request->param('z'); |
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$x = $request->param('x'); |
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$y = $request->param('y'); |
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list($lon1, $lat1) = Tile::zxy2lonlat($z, $x, $y); |
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list($lon2, $lat2) = Tile::zxy2lonlat($z, $x + 1, $y + 1); |
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list($x1, $y1) = ($srid = $raster->getSrid()) == 4326 ? [$lon1, $lat1] : GIS::reproject_array(['srid' => 4326, 'type' => 'Point', 'coordinates' => [$lon1, $lat1]], $srid)['coordinates']; |
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list($x2, $y2) = ($srid = $raster->getSrid()) == 4326 ? [$lon2, $lat2] : GIS::reproject_array(['srid' => 4326, 'type' => 'Point', 'coordinates' => [$lon2, $lat2]], $srid)['coordinates']; |
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$sfx = ($x2 - $x1) / $config['tile_size']; |
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$sfy = ($y2 - $y1) / $config['tile_size']; |
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DB::query("set bytea_output='escape'"); |
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$rasterDef = ($colormap = $raster->getColorMap()) |
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? sprintf('ST_ColorMap(%1$s, \'%2$s\')', $raster->getRasterColumn(), $raster->getColorMap()) |
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: $raster->getRasterColumn(); |
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$sql = sprintf(' |
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SELECT |
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ST_AsPNG(%3$s) pngbinary |
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FROM |
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ST_Retile( |
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\'%1$s\'::regclass, |
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\'%2$s\', |
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ST_MakeEnvelope(%4$f, %5$f, %6$f, %7$f, %8$d), |
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%9$f, %10$f, |
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%11$d, %11$d |
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) %2$s |
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LIMIT 1; |
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', |
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$raster->getTableName(), |
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$raster->getRasterColumn(), |
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$rasterDef, |
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$x1, $y1, $x2, $y2, |
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$srid, |
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$sfx, $sfy, |
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$config['tile_size'] |
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); |
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$query = DB::query($sql); |
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$raw = $query->value(); |
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$response = $this->getResponse(); |
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$dimensions = $raster->getDimensions(); |
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$padding[0] = ($dimensions[0] - $x1) / $sfx; |
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$padding[1] = ($dimensions[1] - $y1) / $sfy; |
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$padding[2] = ($x2 - $dimensions[2]) / $sfx; |
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$padding[3] = ($y2 - $dimensions[3]) / $sfy; |
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$response->addHeader('Content-Type', 'image/png'); |
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if (!$raw) { |
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$response->setBody(base64_decode('iVBORw0KGgoAAAANSUhEUgAAAAEAAAABAQMAAAAl21bKAAAAA1BMVEUAAACnej3aAAAAAXRSTlMAQObYZgAAAApJREFUCNdjYAAAAAIAAeIhvDMAAAAASUVORK5CYII=')); |
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} else if (max(...$padding) > 0) { |
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$imgout = imagecreatetruecolor($config['tile_size'], $config['tile_size']); |
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imagecolortransparent($imgout, imagecolorallocatealpha($imgout, 0, 0, 0, 0)); |
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imagealphablending($imgout, true); |
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imagecopyresampled( |
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$imgout, |
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imagecreatefromstring(pg_unescape_bytea($raw)), |
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$padding[0] > 0 ? $padding[0] : 0, |
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$padding[1] > 0 ? $padding[1] : 0, |
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0, |
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0, |
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$config['tile_size'], |
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$config['tile_size'], |
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(max($x1, $x2) - min($x1, $x2)) / abs($sfx), |
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227
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(max($y1, $y2) - min($y1, $y2)) / abs($sfy) |
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); |
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ob_start(); |
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imagepng($imgout); |
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$response->setBody(ob_get_clean()); |
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} else { |
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$response->setBody(pg_unescape_bytea($raw)); |
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} |
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DB::query("set bytea_output='hex'"); |
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return $response; |
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} |
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1 |
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protected function cacheFile($cache) |
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{ |
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1 |
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$dir = $this->getConfig($this->model)['cache_path'] . DIRECTORY_SEPARATOR; |
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1 |
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$dir = $dir[0] != DIRECTORY_SEPARATOR |
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1 |
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? TEMP_PATH . DIRECTORY_SEPARATOR . $dir |
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1 |
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: $dir; |
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250
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1 |
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if (!file_exists($dir)) { |
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1 |
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mkdir($dir, fileperms(TEMP_PATH), true); |
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} |
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1 |
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return $dir . $cache; |
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} |
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256
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257
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1 |
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protected function cacheAge($cache) |
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{ |
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1 |
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return is_readable($file = $this->cacheFile($cache)) |
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? time() - filemtime($file) |
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1 |
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: false; |
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} |
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protected function readCache($cache) |
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{ |
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return file_get_contents($this->cacheFile($cache)); |
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} |
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269
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1 |
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protected function writeCache($cache, $data) |
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270
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{ |
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271
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1 |
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file_put_contents($this->cacheFile($cache), $data); |
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272
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1 |
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} |
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} |
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smindel /
silverstripe-gis
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