73 lines
2.6 KiB
C++
73 lines
2.6 KiB
C++
/* -*-c++-*- */
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/* osgEarth - Geospatial SDK for OpenSceneGraph
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* Copyright 2020 Pelican Mapping
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* http://osgearth.org
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*
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* osgEarth is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*/
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#ifndef OSGEARTH_TILEHANDLER_H
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#define OSGEARTH_TILEHANDLER_H 1
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#include <osgEarth/Common>
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#include <osgEarth/TileKey>
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#include <osgEarth/Map>
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#include <osgEarth/TileLayer>
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namespace osgEarth { namespace Util
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{
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using namespace osgEarth;
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class TileVisitor;
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/**
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* TileHandler is an interface for operations on a TileKey
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*/
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class OSGEARTH_EXPORT TileHandler : public osg::Referenced
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{
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public:
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/**
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* Process a tile - also provides a reference to the calling TileVisitor
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*/
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virtual bool handleTile(const TileKey& key, const TileVisitor& tv);
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/**
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* Callback that tells a TileVisitor if it should attempt to process this key.
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* If this function returns false no further processing is done on child keys.
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*/
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virtual bool hasData( const TileKey& key ) const;
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/**
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* Returns the process to run when executing in a MultiProcessTileVisitor.
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*
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* When running in a MultiProcessTileVisitor the actual data processing is done by an external program
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* that takes a --tiles argument. This function lets you tie that process to the TileHandler
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*/
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virtual std::string getProcessString() const;
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//! Estimates the total number of tiles that this handler
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//! expects to handle for the given input extents.
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virtual unsigned getEstimatedTileCount(
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const std::vector<GeoExtent>& extents,
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unsigned minLevel,
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unsigned maxLevel) const { return 0; }
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};
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} } // namespace osgEarth
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#endif // OSGEARTH_TRAVERSAL_DATA_H
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