/* $Id$ */ /* * This file is part of OpenTTD. * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2. * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>. */ /** @file spritecache.h Functions to cache sprites in memory. */ #ifndef SPRITECACHE_H #define SPRITECACHE_H #include "gfx_type.h" /** Data structure describing a sprite. */ struct Sprite { byte height; ///< Height of the sprite. uint16 width; ///< Width of the sprite. int16 x_offs; ///< Number of pixels to shift the sprite to the right. int16 y_offs; ///< Number of pixels to shift the sprite downwards. byte data[]; ///< Sprite data. }; extern uint _sprite_cache_size; typedef void *AllocatorProc(size_t size); void *GetRawSprite(SpriteID sprite, SpriteType type, AllocatorProc *allocator = NULL); bool SpriteExists(SpriteID sprite); SpriteType GetSpriteType(SpriteID sprite); uint GetOriginFileSlot(SpriteID sprite); uint GetMaxSpriteID(); static inline const Sprite *GetSprite(SpriteID sprite, SpriteType type) { assert(type != ST_RECOLOUR); return (Sprite*)GetRawSprite(sprite, type); } static inline const byte *GetNonSprite(SpriteID sprite, SpriteType type) { assert(type == ST_RECOLOUR); return (byte*)GetRawSprite(sprite, type); } void GfxInitSpriteMem(); void IncreaseSpriteLRU(); bool LoadNextSprite(int load_index, byte file_index, uint file_sprite_id); bool SkipSpriteData(byte type, uint16 num); void DupSprite(SpriteID old_spr, SpriteID new_spr); #endif /* SPRITECACHE_H */