typedef struct TTF_AtlasEntry { short canvasX, canvasY, width, height, left, ascent, xAdv, yAdv; } TTF_AtlasEntry;

typedef struct TTF_AtlasInfo {
	TTF_AtlasEntry*entries;
	Uint64*ids;
	SDL_Surface*surface;
	int width, height, entryLength, errorCode, spaceXAdv;
} TTF_AtlasInfo;

//Returns null on error, check atlasInfo->errorCode for a hint. The file may not exist or the texture grew too large
//On success a SDL_Texture is returned. You must free the texture and destroy atlasInfo with TTF_DestroyAtlas
//atlasInfo is an out (write only) parameter
SDL_Texture*TTF_AtlasLoadAll(const char*filename, int fontSize, SDL_Renderer*renderer, TTF_AtlasInfo*atlasInfo);
void TTF_DestroyAtlas(TTF_AtlasInfo*atlasInfo);

//////////

typedef struct TTF_AtlasState TTF_AtlasState;

//atlasInfo will be overwritten and a copy of the pointer will be held
//If width or height is 0 we'll use a default value (512)
//when fixedSize is set we will return an error instead of grow
TTF_AtlasState*TTF_AtlasInit(TTF_AtlasInfo*atlasInfo, int width, int height, int fixedSize); 

//These destroy the state and return a pointer. Only the texture is cleaned up by you, we'll clean up the others during TTF_DestroyAtlas
void*TTF_AtlasDeinitWithPixels(TTF_AtlasState*state);
SDL_Surface*TTF_AtlasDeinitWithSurface(TTF_AtlasState*state);
SDL_Texture*TTF_AtlasDeinitWithTexture(TTF_AtlasState*state, SDL_Renderer*renderer);

void TTF_SetAtlasSizeDPI(TTF_AtlasState*state, int hdpi, int vdpi);

//Range is a list of inclusive pairs. rangeLength should always be an even number
//if range and utf8List are both null than every glyph is loaded (except ones that are blank)
//Return the xAdvance of whitespace or negative if there's an error
int TTF_AtlasLoad(const char*filename, int fontSize, TTF_AtlasState*state, int*range, int rangeLength, const char*utf8List, Uint64 IDXor);

//Return 0 to say the glyph should not be loaded, otherwise return an ID
typedef Uint64 (*SDL_AtlasPred)(void*user, int glyph);
int TTF_AtlasLoadPredicate(const char*filename, int fontSize, TTF_AtlasState*state, SDL_AtlasPred pred, void*user);