mirror of
https://github.com/systemed/tilemaker
synced 2025-02-21 13:24:09 +01:00
47 lines
1.4 KiB
C++
47 lines
1.4 KiB
C++
#ifndef TILE_COORDINATES_SET_H
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#define TILE_COORDINATES_SET_H
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#include <cstddef>
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#include "coordinates.h"
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// Interface representing a bitmap of tiles of interest at a given zoom.
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class TileCoordinatesSet {
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public:
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virtual bool test(TileCoordinate x, TileCoordinate y) const = 0;
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virtual void set(TileCoordinate x, TileCoordinate y) = 0;
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virtual size_t size() const = 0;
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virtual size_t zoom() const = 0;
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};
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// Read-write implementation for precise sets; maximum zoom is
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// generally expected to be z14.
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class PreciseTileCoordinatesSet : public TileCoordinatesSet {
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public:
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PreciseTileCoordinatesSet(unsigned int zoom);
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bool test(TileCoordinate x, TileCoordinate y) const override;
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size_t size() const override;
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size_t zoom() const override;
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void set(TileCoordinate x, TileCoordinate y) override;
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private:
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unsigned int zoom_;
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std::vector<bool> tiles;
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};
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// Read-only implementation for a lossy set. Used when zoom is
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// z15 or higher, extrapolates a result based on a set for a lower zoom.
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class LossyTileCoordinatesSet : public TileCoordinatesSet {
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public:
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LossyTileCoordinatesSet(unsigned int zoom, const TileCoordinatesSet& precise);
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bool test(TileCoordinate x, TileCoordinate y) const override;
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size_t size() const override;
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size_t zoom() const override;
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void set(TileCoordinate x, TileCoordinate y) override;
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private:
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unsigned int zoom_;
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const TileCoordinatesSet& tiles;
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unsigned int scale;
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};
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#endif
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