spritecache.h

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/*
 * 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/>.
 */
 
#ifndef SPRITECACHE_H
#define SPRITECACHE_H
 
#include "gfx_type.h"
#include "spriteloader/spriteloader.hpp"
 
struct Sprite {
  uint16_t height; 
  uint16_t width;  
  int16_t x_offs;  
  int16_t y_offs;  
  uint8_t data[];   
};
 
enum SpriteCacheCtrlFlags {
  SCCF_ALLOW_ZOOM_MIN_1X_PAL    = 0, 
  SCCF_ALLOW_ZOOM_MIN_1X_32BPP  = 1, 
  SCCF_ALLOW_ZOOM_MIN_2X_PAL    = 2, 
  SCCF_ALLOW_ZOOM_MIN_2X_32BPP  = 3, 
};
 
extern uint _sprite_cache_size;
 
class SimpleSpriteAllocator : public SpriteAllocator {
protected:
  void *AllocatePtr(size_t size) override;
};
 
class UniquePtrSpriteAllocator : public SpriteAllocator {
public:
  std::unique_ptr<uint8_t[]> data;
protected:
  void *AllocatePtr(size_t size) override;
};
 
void *GetRawSprite(SpriteID sprite, SpriteType type, SpriteAllocator *allocator = nullptr, SpriteEncoder *encoder = nullptr);
bool SpriteExists(SpriteID sprite);
 
SpriteType GetSpriteType(SpriteID sprite);
SpriteFile *GetOriginFile(SpriteID sprite);
uint32_t GetSpriteLocalID(SpriteID sprite);
uint GetSpriteCountForFile(const std::string &filename, SpriteID begin, SpriteID end);
uint GetMaxSpriteID();
 
 
inline const Sprite *GetSprite(SpriteID sprite, SpriteType type)
{
  assert(type != SpriteType::Recolour);
  return (Sprite*)GetRawSprite(sprite, type);
}
 
inline const uint8_t *GetNonSprite(SpriteID sprite, SpriteType type)
{
  assert(type == SpriteType::Recolour);
  return (uint8_t*)GetRawSprite(sprite, type);
}
 
void GfxInitSpriteMem();
void GfxClearSpriteCache();
void GfxClearFontSpriteCache();
void IncreaseSpriteLRU();
 
SpriteFile &OpenCachedSpriteFile(const std::string &filename, Subdirectory subdir, bool palette_remap);
std::span<const std::unique_ptr<SpriteFile>> GetCachedSpriteFiles();
 
void ReadGRFSpriteOffsets(SpriteFile &file);
size_t GetGRFSpriteOffset(uint32_t id);
bool LoadNextSprite(int load_index, SpriteFile &file, uint file_sprite_id);
bool SkipSpriteData(SpriteFile &file, uint8_t type, uint16_t num);
void DupSprite(SpriteID old_spr, SpriteID new_spr);
 
#endif /* SPRITECACHE_H */