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
75 lines
1.5 KiB
C++
75 lines
1.5 KiB
C++
#ifndef LLMR_MAP_TILE_DATA
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#define LLMR_MAP_TILE_DATA
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#include <llmr/map/tile.hpp>
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#include <llmr/util/noncopyable.hpp>
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#include <llmr/platform/platform.hpp>
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#include <llmr/geometry/vao.hpp>
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#include <llmr/renderer/debug_bucket.hpp>
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#include <cstdint>
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#include <string>
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#include <memory>
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#include <atomic>
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namespace llmr {
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class Map;
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class Painter;
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class LayerDescription;
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class TileData : public std::enable_shared_from_this<TileData>,
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private util::noncopyable {
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public:
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struct exception : std::exception {};
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struct geometry_too_long_exception : exception {};
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public:
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typedef std::shared_ptr<TileData> Ptr;
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enum class State {
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invalid,
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initial,
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loading,
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loaded,
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parsed,
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obsolete
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};
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public:
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TileData(Tile::ID id, Map &map, const std::string url);
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~TileData();
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void request();
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void cancel();
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void reparse();
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const std::string toString() const;
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// Override this in the child class.
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virtual void parse() = 0;
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virtual void render(Painter &painter, const LayerDescription& layer_desc) = 0;
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public:
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const Tile::ID id;
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std::atomic<State> state;
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protected:
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Map ↦
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// Request-related information.
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const std::string url;
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std::weak_ptr<platform::Request> req;
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std::string data;
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// Contains the tile ID string for painting debug information.
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DebugFontBuffer debugFontBuffer;
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public:
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DebugBucket debugBucket;
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};
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}
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#endif
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