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(svn r13674) -Fix [FS#2127]: crash when drawing a non-real sprite. The drawing of the non-real sprite is caused when two NewGRFs replace the same sprite and the first replaces it with a real sprite (and thus assumes it remains a real sprite) and the second replaces it with a non-real sprite. OpenTTD already looked at whether the sprite to load should be seen as a real or non-real sprite, but it failed to replace non-real sprites with a substitute real sprite when getting the sprite from the cache.

This commit is contained in:
rubidium 2008-07-04 14:45:51 +00:00
parent f37a47c0cb
commit 173f0f4cd5
1 changed files with 10 additions and 2 deletions
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12
src/spritecache.cpp
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@ -24,10 +24,11 @@ uint _sprite_cache_size = 4;
struct SpriteCache {
void *ptr;
uint32 id;
size_t file_pos;
uint32 id;
uint16 file_slot;
int16 lru;
bool real_sprite; ///< In some cases a single sprite is misused by two NewGRFs. Once as real sprite and once as non-real sprite. If the non-real sprite gets into the cache it might be drawn as real sprite which causes enormous trouble.
};
@ -176,6 +177,7 @@ static void* ReadSprite(SpriteCache *sc, SpriteID id, bool real_sprite)
byte *dest = (byte *)AllocSprite(num);
sc->ptr = dest;
sc->real_sprite = false;
FioReadBlock(dest, num);
return sc->ptr;
@ -217,9 +219,13 @@ static void* ReadSprite(SpriteCache *sc, SpriteID id, bool real_sprite)
}
}
sc->real_sprite = false;
return sc->ptr;
}
sc->real_sprite = true;
if (!real_sprite) {
static byte warning_level = 0;
DEBUG(sprite, warning_level, "Tried to load real sprite #%d as a non sprite. Probable cause: NewGRF interference", id);
@ -255,6 +261,7 @@ bool LoadNextSprite(int load_index, byte file_slot, uint file_sprite_id)
sc->ptr = NULL;
sc->lru = 0;
sc->id = file_sprite_id;
sc->real_sprite = false;
return true;
}
@ -269,6 +276,7 @@ void DupSprite(SpriteID old_spr, SpriteID new_spr)
scnew->file_pos = scold->file_pos;
scnew->ptr = NULL;
scnew->id = scold->id;
scnew->real_sprite = scold->real_sprite;
}
@ -453,7 +461,7 @@ const void *GetRawSprite(SpriteID sprite, bool real_sprite)
p = sc->ptr;
/* Load the sprite, if it is not loaded, yet */
if (p == NULL) p = ReadSprite(sc, sprite, real_sprite);
if (p == NULL || sc->real_sprite != real_sprite) p = ReadSprite(sc, sprite, real_sprite);
return p;
}