Changeset - r10685:9aaca664ce3c
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smatz - 15 years ago 2009-01-11 22:28:30
smatz@openttd.org
(svn r14997) -Fix [FS#2524](r14223): when handling invalid sprites, entry in spritecache data could lose its parent
2 files changed with 82 insertions and 46 deletions:
src/gfx_type.h
1
src/spritecache.cpp
81
46
0 comments (0 inline, 0 general)
src/gfx_type.h
➞
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@@ -240,6 +240,7 @@ enum SpriteType {
 
	ST_MAPGEN   = 1,      ///< Special sprite for the map generator
 
	ST_FONT     = 2,      ///< A sprite used for fonts
 
	ST_RECOLOUR = 3,      ///< Recolour sprite
 
	ST_INVALID  = 4,      ///< Pseudosprite or other unusable sprite, used only internally
 
};
 

			




	
	
	
		
 
#endif /* GFX_TYPE_H */

			




        

    


    
    

    

        

                

                    src/spritecache.cpp
                

                

                  
                      
                        

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@@ -16,6 +16,7 @@

			




	
	
	
		
 
#include "spriteloader/png.hpp"

			




	
	
	
		
 
#endif /* WITH_PNG */

			




	
	
	
		
 
#include "blitter/factory.hpp"

			




	
	
	
		
 
#include "core/math_func.hpp"

			




	
	
	
		
 

			




	
	
	
		
 
#include "table/sprites.h"

			




	
	
	
		
 

			




	
	
		
 
@@ -42,6 +43,10 @@ static inline SpriteCache *GetSpriteCach

			




	
	
	
		
 
	return &_spritecache[index];

			




	
	
	
		
 
}

			




	
	
	
		
 

			




	
	
	
		
 
static inline bool IsMapgenSpriteID(SpriteID sprite)

			




	
	
	
		
 
{

			




	
	
	
		
 
	return IsInsideMM(sprite, 4845, 4882);

			




	
	
	
		
 
}

			




	
	
	
		
 

			




	
	
	
		
 
static SpriteCache *AllocateSpriteCache(uint index)

			




	
	
	
		
 
{

			




	
	
		
 
@@ -100,27 +105,26 @@ void SkipSpriteData(byte type, uint16 nu

			




	
	
	
		
 

			




	
	
	
		
 
/**

			




	
	
	
		
 
 * Read the sprite header data and then skip the real payload.

			




	
	
	
		
 
 * @return true if the sprite is a pseudo sprite.

			




	
	
	
		
 
 * @return type of sprite; ST_INVALID if the sprite is a pseudo- or unusable sprite

			




	
	
	
		
 
 */

			




	
	
	
		
 
static bool ReadSpriteHeaderSkipData()

			




	
	
	
		
 
static SpriteType ReadSpriteHeaderSkipData()

			




	
	
	
		
 
{

			




	
	
	
		
 
	uint16 num = FioReadWord();

			




	
	
	
		
 
	byte type;

			




	
	
	
		
 

			




	
	
	
		
 
	if (num == 0) return false;

			




	
	
	
		
 
	if (num == 0) return ST_INVALID;

			




	
	
	
		
 

			




	
	
	
		
 
	type = FioReadByte();

			




	
	
	
		
 
	byte type = FioReadByte();

			




	
	
	
		
 
	if (type == 0xFF) {

			




	
	
	
		
 
		FioSkipBytes(num);

			




	
	
	
		
 
		/* Some NewGRF files have "empty" pseudo-sprites which are 1

			




	
	
	
		
 
		 * byte long. Catch these so the sprites won't be displayed. */

			




	
	
	
		
 
		return num != 1;

			




	
	
	
		
 
		return (num == 1) ? ST_INVALID : ST_RECOLOUR;

			




	
	
	
		
 
	}

			




	
	
	
		
 

			




	
	
	
		
 
	FioSkipBytes(7);

			




	
	
	
		
 
	SkipSpriteData(type, num - 8);

			




	
	
	
		
 

			




	
	
	
		
 
	return true;

			




	
	
	
		
 
	return ST_NORMAL;

			




	
	
	
		
 
}

			




	
	
	
		
 

			




	
	
	
		
 
/* Check if the given Sprite ID exists */

			




	
	
		
 
@@ -139,16 +143,10 @@ static void *ReadSprite(SpriteCache *sc,

			




	
	
	
		
 
	uint8 file_slot = sc->file_slot;

			




	
	
	
		
 
	size_t file_pos = sc->file_pos;

			




	
	
	
		
 

			




	
	
	
		
 
	DEBUG(sprite, 9, "Load sprite %d", id);

			




	
	
	
		
 

			




	
	
	
		
 
	if (!SpriteExists(id)) {

			




	
	
	
		
 
		DEBUG(sprite, 1, "Tried to load non-existing sprite #%d. Probable cause: Wrong/missing NewGRFs", id);

			




	
	
	
		
 
	assert(IsMapgenSpriteID(id) == (sprite_type == ST_MAPGEN));

			




	
	
	
		
 
	assert(sc->type == sprite_type);

			




	
	
	
		
 

			




	
	
	
		
 
		/* SPR_IMG_QUERY is a BIG FAT RED ? */

			




	
	
	
		
 
		id = SPR_IMG_QUERY;

			




	
	
	
		
 
		file_slot = GetSpriteCache(SPR_IMG_QUERY)->file_slot;

			




	
	
	
		
 
		file_pos  = GetSpriteCache(SPR_IMG_QUERY)->file_pos;

			




	
	
	
		
 
	}

			




	
	
	
		
 
	DEBUG(sprite, 9, "Load sprite %d", id);

			




	
	
	
		
 

			




	
	
	
		
 
	if (sprite_type == ST_NORMAL && BlitterFactoryBase::GetCurrentBlitter()->GetScreenDepth() == 32) {

			




	
	
	
		
 
#ifdef WITH_PNG

			




	
	
		
 
@@ -160,8 +158,6 @@ static void *ReadSprite(SpriteCache *sc,

			




	
	
	
		
 
			sc->ptr = BlitterFactoryBase::GetCurrentBlitter()->Encode(&sprite, &AllocSprite);

			




	
	
	
		
 
			free(sprite.data);

			




	
	
	
		
 

			




	
	
	
		
 
			sc->type = sprite_type;

			




	
	
	
		
 

			




	
	
	
		
 
			return sc->ptr;

			




	
	
	
		
 
		}

			




	
	
	
		
 
		/* If the PNG couldn't be loaded, fall back to 8bpp grfs */

			




	
	
		
 
@@ -179,16 +175,10 @@ static void *ReadSprite(SpriteCache *sc,

			




	
	
	
		
 
	/* Read the size and type */

			




	
	
	
		
 
	int num  = FioReadWord();

			




	
	
	
		
 
	byte type = FioReadByte();

			




	
	
	
		
 

			




	
	
	
		
 
	/* Type 0xFF indicates either a colormap or some other non-sprite info */

			




	
	
	
		
 
	assert((type == 0xFF) == (sprite_type == ST_RECOLOUR));

			




	
	
	
		
 
	if (type == 0xFF) {

			




	
	
	
		
 
		if (sprite_type != ST_RECOLOUR) {

			




	
	
	
		
 
			static byte warning_level = 0;

			




	
	
	
		
 
			DEBUG(sprite, warning_level, "Tried to load recolour sprite #%d as a real sprite. Probable cause: NewGRF interference", id);

			




	
	
	
		
 
			warning_level = 6;

			




	
	
	
		
 
			if (id == SPR_IMG_QUERY) usererror("Uhm, would you be so kind not to load a NewGRF that makes the 'query' sprite a recolour-sprite?");

			




	
	
	
		
 
			return (void*)GetRawSprite(SPR_IMG_QUERY, ST_NORMAL);

			




	
	
	
		
 
		}

			




	
	
	
		
 

			




	
	
	
		
 
		/* "Normal" recolour sprites are ALWAYS 257 bytes. Then there is a small

			




	
	
	
		
 
		 * number of recolour sprites that are 17 bytes that only exist in DOS

			




	
	
	
		
 
		 * GRFs which are the same as 257 byte recolour sprites, but with the last

			




	
	
		
 
@@ -197,7 +187,6 @@ static void *ReadSprite(SpriteCache *sc,

			




	
	
	
		
 
		byte *dest = (byte *)AllocSprite(max(RECOLOUR_SPRITE_SIZE, num));

			




	
	
	
		
 

			




	
	
	
		
 
		sc->ptr = dest;

			




	
	
	
		
 
		sc->type = sprite_type;

			




	
	
	
		
 

			




	
	
	
		
 
		if (_palette_remap_grf[sc->file_slot]) {

			




	
	
	
		
 
			byte *dest_tmp = AllocaM(byte, max(RECOLOUR_SPRITE_SIZE, num));

			




	
	
		
 
@@ -216,6 +205,7 @@ static void *ReadSprite(SpriteCache *sc,

			




	
	
	
		
 

			




	
	
	
		
 
		return sc->ptr;

			




	
	
	
		
 
	}

			




	
	
	
		
 

			




	
	
	
		
 
	/* Ugly hack to work around the problem that the old landscape

			




	
	
	
		
 
	 *  generator assumes that those sprites are stored uncompressed in

			




	
	
	
		
 
	 *  the memory, and they are only read directly by the code, never

			




	
	
		
 
@@ -225,7 +215,6 @@ static void *ReadSprite(SpriteCache *sc,

			




	
	
	
		
 
	 * Ugly: yes. Other solution: no. Blame the original author or

			




	
	
	
		
 
	 *  something ;) The image should really have been a data-stream

			




	
	
	
		
 
	 *  (so type = 0xFF basicly). */

			




	
	
	
		
 
	assert((id >= 4845 && id <= 4881) == (sprite_type == ST_MAPGEN));

			




	
	
	
		
 
	if (sprite_type == ST_MAPGEN) {

			




	
	
	
		
 
		uint height = FioReadByte();

			




	
	
	
		
 
		uint width  = FioReadWord();

			




	
	
		
 
@@ -259,18 +248,11 @@ static void *ReadSprite(SpriteCache *sc,

			




	
	
	
		
 
		return sc->ptr;

			




	
	
	
		
 
	}

			




	
	
	
		
 

			




	
	
	
		
 
	if (sprite_type == ST_RECOLOUR) {

			




	
	
	
		
 
		static byte warning_level = 0;

			




	
	
	
		
 
		DEBUG(sprite, warning_level, "Tried to load real sprite #%d as a recolour sprite. Probable cause: NewGRF interference", id);

			




	
	
	
		
 
		warning_level = 6;

			




	
	
	
		
 
		return (void*)GetRawSprite(id, ST_NORMAL);

			




	
	
	
		
 
	}

			




	
	
	
		
 
	assert(sprite_type == ST_NORMAL);

			




	
	
	
		
 

			




	
	
	
		
 
	SpriteLoaderGrf sprite_loader;

			




	
	
	
		
 
	SpriteLoader::Sprite sprite;

			




	
	
	
		
 

			




	
	
	
		
 
	sc->type = sprite_type;

			




	
	
	
		
 

			




	
	
	
		
 
	if (!sprite_loader.LoadSprite(&sprite, file_slot, file_pos, sprite_type)) {

			




	
	
	
		
 
		if (id == SPR_IMG_QUERY) usererror("Okay... something went horribly wrong. I couldn't load the fallback sprite. What should I do?");

			




	
	
	
		
 
		return (void*)GetRawSprite(SPR_IMG_QUERY, ST_NORMAL);

			




	
	
		
 
@@ -284,22 +266,30 @@ static void *ReadSprite(SpriteCache *sc,

			




	
	
	
		
 

			




	
	
	
		
 
bool LoadNextSprite(int load_index, byte file_slot, uint file_sprite_id)

			




	
	
	
		
 
{

			




	
	
	
		
 
	SpriteCache *sc;

			




	
	
	
		
 
	size_t file_pos = FioGetPos();

			




	
	
	
		
 

			




	
	
	
		
 
	if (!ReadSpriteHeaderSkipData()) return false;

			




	
	
	
		
 
	SpriteType type = ReadSpriteHeaderSkipData();

			




	
	
	
		
 

			




	
	
	
		
 
	if (type == ST_INVALID) return false;

			




	
	
	
		
 

			




	
	
	
		
 
	if (load_index >= MAX_SPRITES) {

			




	
	
	
		
 
		usererror("Tried to load too many sprites (#%d; max %d)", load_index, MAX_SPRITES);

			




	
	
	
		
 
	}

			




	
	
	
		
 

			




	
	
	
		
 
	sc = AllocateSpriteCache(load_index);

			




	
	
	
		
 
	bool is_mapgen = IsMapgenSpriteID(load_index);

			




	
	
	
		
 

			




	
	
	
		
 
	if (is_mapgen) {

			




	
	
	
		
 
		if (type != ST_NORMAL) usererror("Uhm, would you be so kind not to load a NewGRF that changes the type of the map generator sprites?");

			




	
	
	
		
 
		type = ST_MAPGEN;

			




	
	
	
		
 
	}

			




	
	
	
		
 

			




	
	
	
		
 
	SpriteCache *sc = AllocateSpriteCache(load_index);

			




	
	
	
		
 
	sc->file_slot = file_slot;

			




	
	
	
		
 
	sc->file_pos = file_pos;

			




	
	
	
		
 
	sc->ptr = NULL;

			




	
	
	
		
 
	sc->lru = 0;

			




	
	
	
		
 
	sc->id = file_sprite_id;

			




	
	
	
		
 
	sc->type = ST_NORMAL;

			




	
	
	
		
 
	sc->type = type;

			




	
	
	
		
 

			




	
	
	
		
 
	return true;

			




	
	
	
		
 
}

			




	
	
		
 
@@ -483,23 +473,68 @@ void *AllocSprite(size_t mem_req)

			




	
	
	
		
 
	}

			




	
	
	
		
 
}

			




	
	
	
		
 

			




	
	
	
		
 
/** Handles the case when a sprite of different type is requested than is present in the SpriteCache.

			




	
	
	
		
 
 * For ST_FONT sprites, it is normal. In other cases, default sprite is loaded instead.

			




	
	
	
		
 
 * @param sprite ID of loaded sprite

			




	
	
	
		
 
 * @param requested requested sprite type

			




	
	
	
		
 
 * @param available available sprite type

			




	
	
	
		
 
 * @return fallback sprite

			




	
	
	
		
 
 * @note this function will do usererror() in the case the fallback sprite isn't available */

			




	
	
	
		
 
static const void *HandleInvalidSpriteRequest(SpriteID sprite, SpriteType requested, SpriteType available)

			




	
	
	
		
 
{

			




	
	
	
		
 
	static const char *sprite_types[] = {

			




	
	
	
		
 
		"normal",        // ST_NORMAL

			




	
	
	
		
 
		"map generator", // ST_MAPGEN

			




	
	
	
		
 
		"character",     // ST_FONT

			




	
	
	
		
 
		"recolour",      // ST_RECOLOUR

			




	
	
	
		
 
	};

			




	
	
	
		
 

			




	
	
	
		
 
	if (requested == ST_FONT && available == ST_NORMAL) return GetRawSprite(sprite, ST_NORMAL);

			




	
	
	
		
 

			




	
	
	
		
 
	static byte warning_level = 0;

			




	
	
	
		
 
	DEBUG(sprite, warning_level, "Tried to load %s sprite #%d as a %s sprite. Probable cause: NewGRF interference", sprite_types[available], sprite, sprite_types[requested]);

			




	
	
	
		
 
	warning_level = 6;

			




	
	
	
		
 

			




	
	
	
		
 
	switch (requested) {

			




	
	
	
		
 
		case ST_NORMAL:

			




	
	
	
		
 
			if (sprite == SPR_IMG_QUERY) usererror("Uhm, would you be so kind not to load a NewGRF that makes the 'query' sprite a non-normal sprite?");

			




	
	
	
		
 
			/* FALLTHROUGH */

			




	
	
	
		
 
		case ST_FONT:

			




	
	
	
		
 
			return GetRawSprite(SPR_IMG_QUERY, ST_NORMAL);

			




	
	
	
		
 
		case ST_RECOLOUR:

			




	
	
	
		
 
			if (sprite == PALETTE_TO_DARK_BLUE) usererror("Uhm, would you be so kind not to load a NewGRF that makes the 'PALETTE_TO_DARK_BLUE' sprite a non-remap sprite?");

			




	
	
	
		
 
			return GetRawSprite(PALETTE_TO_DARK_BLUE, ST_RECOLOUR);

			




	
	
	
		
 
		case ST_MAPGEN:

			




	
	
	
		
 
			/* this shouldn't happen, overriding of ST_MAPGEN sprites is checked in LoadNextSprite()

			




	
	
	
		
 
			 * (the only case the check fails is when these sprites weren't even loaded...) */

			




	
	
	
		
 
		default:

			




	
	
	
		
 
			NOT_REACHED();

			




	
	
	
		
 
	}

			




	
	
	
		
 
}

			




	
	
	
		
 

			




	
	
	
		
 
const void *GetRawSprite(SpriteID sprite, SpriteType type)

			




	
	
	
		
 
{

			




	
	
	
		
 
	SpriteCache *sc;

			




	
	
	
		
 
	void *p;

			




	
	
	
		
 
	assert(IsMapgenSpriteID(sprite) == (type == ST_MAPGEN));

			




	
	
	
		
 
	assert(type < ST_INVALID);

			




	
	
	
		
 

			




	
	
	
		
 
	if (!SpriteExists(sprite)) {

			




	
	
	
		
 
		DEBUG(sprite, 1, "Tried to load non-existing sprite #%d. Probable cause: Wrong/missing NewGRFs", sprite);

			




	
	
	
		
 

			




	
	
	
		
 
	assert(sprite < _spritecache_items);

			




	
	
	
		
 
		/* SPR_IMG_QUERY is a BIG FAT RED ? */

			




	
	
	
		
 
		sprite = SPR_IMG_QUERY;

			




	
	
	
		
 
	}

			




	
	
	
		
 

			




	
	
	
		
 
	sc = GetSpriteCache(sprite);

			




	
	
	
		
 
	SpriteCache *sc = GetSpriteCache(sprite);

			




	
	
	
		
 

			




	
	
	
		
 
	if (sc->type != type) return HandleInvalidSpriteRequest(sprite, type, sc->type);

			




	
	
	
		
 

			




	
	
	
		
 
	/* Update LRU */

			




	
	
	
		
 
	sc->lru = ++_sprite_lru_counter;

			




	
	
	
		
 

			




	
	
	
		
 
	p = sc->ptr;

			




	
	
	
		
 
	void *p = sc->ptr;

			




	
	
	
		
 

			




	
	
	
		
 
	/* Load the sprite, if it is not loaded, yet */

			




	
	
	
		
 
	if (p == NULL || sc->type != type) p = ReadSprite(sc, sprite, type);

			




	
	
	
		
 
	if (p == NULL) p = ReadSprite(sc, sprite, type);

			




	
	
	
		
 

			




	
	
	
		
 
	return p;

			




	
	
	
		
 
}

			




        

    



    


    



    



      

      





    
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