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54 lines
1.8 KiB
C
54 lines
1.8 KiB
C
/*
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* tilepacker.h
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* A k-d tree based bin packer that organizes rectangular tiles to fit
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* neatly into one texture.
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*
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* Copyright © 2018, Alex Dawson. All rights reserved.
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*/
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#ifndef TILEPACKER_H_
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#define TILEPACKER_H_
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#define MAXTILESHEETS 64
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#define MAXPACKEDTILES MAXTILES+1
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typedef struct
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{
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uint32_t u, v, width, height;
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} TileRect;
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typedef struct
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{
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uint32_t tilesheetID;
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TileRect rect;
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} Tile;
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// Initialize the specified tilesheet
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// tilesheetId must be less than MAXTILESHEETS
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// Re-initializing an existing tilesheet will discard all of its contents
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void tilepacker_initTilesheet(uint32_t tilesheetID, uint32_t tilesheetWidth, uint32_t tilesheetHeight);
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// Adds a tile into sorted collection to be packed
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// uid can be any unique key -- picnums are used for indexed colour textures
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void tilepacker_addTile(uint32_t tileUID, uint32_t tileWidth, uint32_t tileHeight);
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// Packs the sorted collection of tiles that have been added with tilepacker_addTile()
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// Returns true if all nodes could be packed succesfully into the specified tilesheet
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// tilepacker_pack can be called again with a different tilesheetId to pack the remaining tiles
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char tilepacker_pack(uint32_t tilesheetID);
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// Discard the rejected tiles so that they will not be carried over to the next call to tilepacker_pack
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void tilepacker_discardRejects();
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// Sets pOutput to contain the Tile information for a packed tile with the given tileUID
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// Returns true if the Tile has been packed, false otherwise
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// If pOutput is NULL, the function solely returns whether or not the Tile has been packed
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char tilepacker_getTile(uint32_t tileUID, Tile *pOutput);
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// Returns true if the Tile with tileUID has been packed, false otherwise
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static inline char tilepacker_isTilePacked(uint32_t tileUID)
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{
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return tilepacker_getTile(tileUID, NULL);
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};
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#endif /* TILEPACKER_H_ */
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