/**
* Requests a single tile to be used in Helioviewer.org.
*
* TODO 2011/04/19: How much longer would it take to request tiles if
* meta data was refetched from database instead of
* being passed in?
*
* @return object The image tile
*/
public function getTile()
{
include_once HV_ROOT_DIR . '/../src/Database/ImgIndex.php';
include_once HV_ROOT_DIR . '/../src/Image/JPEG2000/JP2Image.php';
include_once HV_ROOT_DIR . '/../src/Helper/RegionOfInterest.php';
// Tilesize
$tileSize = 512;
$params = $this->_params;
// Look up image properties
$imgIndex = new Database_ImgIndex();
$image = $imgIndex->getImageInformation($this->_params['id']);
$this->_options['date'] = $image['date'];
// Tile filepath
$filepath = $this->_getTileCacheFilename($image['filepath'], $image['filename'], $params['imageScale'], $params['x'], $params['y']);
// Create directories in cache
$this->_createTileCacheDir($image['filepath']);
// JP2 filepath
$jp2Filepath = HV_JP2_DIR . $image['filepath'] . '/' . $image['filename'];
// Reference pixel offset at the original image scale
$offsetX = $image['refPixelX'] - $image['width'] / 2;
$offsetY = -($image['refPixelY'] - $image['height'] / 2);
// Instantiate a JP2Image
$jp2 = new Image_JPEG2000_JP2Image($jp2Filepath, $image['width'], $image['height'], $image['scale']);
// Region of interest
$roi = $this->_tileCoordinatesToROI($params['x'], $params['y'], $params['imageScale'], $image['scale'], $tileSize, $offsetX, $offsetY);
// Choose type of tile to create
// TODO 2011/04/18: Generalize process of choosing class to use
//error_log(json_encode($image['uiLabels']));
if (count($image['uiLabels']) >= 3 && $image['uiLabels'][1]['name'] == 'SECCHI') {
if (substr($image['uiLabels'][2]['name'], 0, 3) == 'COR') {
$type = 'CORImage';
} else {
$type = strtoupper($image['uiLabels'][2]['name']) . 'Image';
}
} else {
if ($image['uiLabels'][0]['name'] == 'TRACE') {
$type = strtoupper($image['uiLabels'][0]['name']) . 'Image';
} else {
if ($image['uiLabels'][0]['name'] == 'Hinode') {
$type = 'XRTImage';
} else {
if (count($image['uiLabels']) >= 2) {
$type = strtoupper($image['uiLabels'][1]['name']) . 'Image';
}
}
}
}
include_once HV_ROOT_DIR . '/../src/Image/ImageType/' . $type . '.php';
$classname = 'Image_ImageType_' . $type;
// Create the tile
$tile = new $classname($jp2, $filepath, $roi, $image['uiLabels'], $offsetX, $offsetY, $this->_options, $image['sunCenterOffsetParams']);
// Save and display
$tile->save();
$tile->display();
}
