void ImageLayerTileProcessor::process( osg::ref_ptr<osg::Image>& image ) const { if ( !image.valid() ) return; // Check to see if the image is the nodata image if ( _noDataImage.valid() ) { if (ImageUtils::areEquivalent(image.get(), _noDataImage.get())) { //OE_DEBUG << LC << "Found nodata" << std::endl; image = 0L; return; } } // If this is a compressed image, uncompress it IF the image is not already in the // target profile...because if it's not in the target profile, we will have to do // some mosaicing...and we can't mosaic a compressed image. if (!_layerInTargetProfile && ImageUtils::isCompressed(image.get()) && ImageUtils::canConvert(image.get(), GL_RGBA, GL_UNSIGNED_BYTE) ) { image = ImageUtils::convertToRGBA8( image.get() ); } // Apply a transparent color mask if one is specified if ( _options.transparentColor().isSet() ) { if ( !ImageUtils::hasAlphaChannel(image.get()) && ImageUtils::canConvert(image.get(), GL_RGBA, GL_UNSIGNED_BYTE) ) { // if the image doesn't have an alpha channel, we must convert it to // a format that does before continuing. image = ImageUtils::convertToRGBA8( image.get() ); } ImageUtils::PixelVisitor<ApplyChromaKey> applyChroma; applyChroma._chromaKey = _chromaKey; applyChroma.accept( image.get() ); } }
/** * Create and return an image for the given TileKey. */ osg::Image* createImage( const TileKey& key, ProgressCallback* progress ) { if (_debugDirect) { //osg::Image* image = new osg::Image; //image->allocateImage(256,256,1, GL_RGB, GL_UNSIGNED_BYTE); //return image; return osgDB::readImageFile( getDirectURI(key) ); //return URI(getDirectURI(key)).getImage(_dbOptions.get(), progress); } // center point of the tile (will be in spherical mercator) double x, y; key.getExtent().getCentroid(x, y); // transform it to lat/long: GeoPoint geo; GeoPoint( getProfile()->getSRS(), x, y ).transform( getProfile()->getSRS()->getGeographicSRS(), geo ); // contact the REST API. Docs are here: // http://msdn.microsoft.com/en-us/library/ff701716.aspx // construct the request URI: std::string request = Stringify() << std::setprecision(12) << _options.imageryMetadataAPI().get() // base REST API << "/" << _options.imagerySet().get() // imagery set to use << "/" << geo.y() << "," << geo.x() // center point in lat/long << "?zl=" << key.getLOD() + 1 // zoom level << "&o=json" // response format << "&key=" << _options.key().get(); // API key // check the URI cache. URI location; TileURICache::Record rec; if ( _tileURICache.get(request, rec) ) { location = URI(rec.value()); //CacheStats stats = _tileURICache.getStats(); //OE_INFO << "Ratio = " << (stats._hitRatio*100) << "%" << std::endl; } else { unsigned c = ++_apiCount; if ( c % 25 == 0 ) OE_INFO << LC << "API calls = " << c << std::endl; // fetch it: ReadResult metadataResult = URI(request).readString(_dbOptions, progress); if ( metadataResult.failed() ) { // check for a REST error: if ( metadataResult.code() == ReadResult::RESULT_SERVER_ERROR ) { OE_WARN << LC << "REST API request error!" << std::endl; Config metadata; std::string content = metadataResult.getString(); metadata.fromJSON( content ); ConfigSet errors = metadata.child("errorDetails").children(); for(ConfigSet::const_iterator i = errors.begin(); i != errors.end(); ++i ) { OE_WARN << LC << "REST API: " << i->value() << std::endl; } return 0L; } else { OE_WARN << LC << "Request error: " << metadataResult.getResultCodeString() << std::endl; } return 0L; } // decode it: Config metadata; if ( !metadata.fromJSON(metadataResult.getString()) ) { OE_WARN << LC << "Error decoding REST API response" << std::endl; return 0L; } // check the vintage field. If it's empty, that means we got a "no data" tile. Config* vintageEnd = metadata.find("vintageEnd"); if ( !vintageEnd || vintageEnd->value().empty() ) { OE_DEBUG << LC << "NO data image encountered." << std::endl; return 0L; } // find the tile URI: Config* locationConf= metadata.find("imageUrl"); if ( !locationConf ) { OE_WARN << LC << "REST API JSON parsing error (imageUrl not found)" << std::endl; return 0L; } location = URI( locationConf->value() ); _tileURICache.insert( request, location.full() ); } // request the actual tile //OE_INFO << "key = " << key.str() << ", URL = " << location->value() << std::endl; //osg::Image* image = location.getImage(_dbOptions.get(), progress); osg::Image* image = osgDB::readImageFile( location.full() ); if ( image && _geom.valid() ) { GeometryRasterizer rasterizer( image->s(), image->t() ); rasterizer.draw( _geom.get(), osg::Vec4(1,1,1,1) ); osg::ref_ptr<osg::Image> overlay = rasterizer.finalize(); ImageUtils::PixelVisitor<AlphaBlend> blend; blend.accept( overlay.get(), image ); } return image; }