0bfd7b0f43
This changes the clip IDs from sequential to a huffman prefix tree, meaning that parent tiles share the same prefix with child tiles (but are shorter). This allows us to use the same checkerboard pattern to draw all tiles. TODO: - make sure we're not overflowing the 8 bit limit of the stencil buffer - draw all checkerboard fields at the same time, with one draw call - fix raster drawing (fading, clipping) refs #132
77 lines
1.8 KiB
C++
77 lines
1.8 KiB
C++
#ifndef LLMR_MAP_SOURCE
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#define LLMR_MAP_SOURCE
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#include <llmr/map/tile.hpp>
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#include <llmr/map/tile_data.hpp>
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#include <llmr/util/noncopyable.hpp>
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#include <llmr/util/time.hpp>
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#include <list>
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#include <forward_list>
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#include <memory>
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#include <vector>
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#include <string>
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#include <map>
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namespace llmr {
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class Map;
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class TransformState;
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class Painter;
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class Texturepool;
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class Source : public std::enable_shared_from_this<Source>, private util::noncopyable {
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public:
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enum class Type {
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vector,
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raster
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};
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public:
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Source(Map &map, Painter &painter,
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const char *url = "", Type type = Type::vector, std::vector<uint32_t> zooms = {0},
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uint32_t tile_size = 512, uint32_t min_zoom = 0, uint32_t max_zoom = 14,
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bool enabled = true);
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bool update();
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size_t prepareRender(const TransformState &transform);
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void render();
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std::forward_list<Tile::ID> getIDs() const;
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void updateClipIDs(const std::map<Tile::ID, ClipID> &mapping);
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public:
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bool enabled;
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private:
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bool findLoadedChildren(const Tile::ID& id, int32_t maxCoveringZoom, std::forward_list<Tile::ID>& retain);
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bool findLoadedParent(const Tile::ID& id, int32_t minCoveringZoom, std::forward_list<Tile::ID>& retain);
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std::forward_list<Tile::ID> covering_tiles(int32_t zoom, const box& points);
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bool updateTiles();
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TileData::State addTile(const Tile::ID& id);
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TileData::State hasTile(const Tile::ID& id);
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double getZoom() const;
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private:
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Map& map;
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Painter& painter;
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const Type type;
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const std::vector<uint32_t> zooms;
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const std::string url;
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const uint32_t tile_size;
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const int32_t min_zoom;
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const int32_t max_zoom;
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std::forward_list<Tile> tiles;
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std::forward_list<std::weak_ptr<TileData>> tile_data;
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};
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}
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#endif
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