mirror of https://github.com/OpenTTD/OpenTTD.git
(svn r4446) - Add function to determine if a Sprite ID exists.
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@ -71,6 +71,13 @@ static bool ReadSpriteHeaderSkipData(void)
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return true;
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}
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/* Check if the given Sprite ID exists */
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bool SpriteExists(SpriteID id)
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{
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/* Special case for Sprite ID zero -- its position is also 0... */
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return _sprite_file_pos[id] != 0 || id == 0;
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}
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static void* AllocSprite(size_t);
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static void* ReadSprite(SpriteID id)
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@ -80,7 +87,7 @@ static void* ReadSprite(SpriteID id)
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DEBUG(spritecache, 9) ("load sprite %d", id);
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if (_sprite_file_pos[id] == 0 && id != 0) {
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if (!SpriteExists(id)) {
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error(
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"Tried to load non-existing sprite #%d.\n"
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"Probable cause: Wrong/missing NewGRFs",
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@ -13,6 +13,7 @@ typedef struct Sprite {
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} Sprite;
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const void *GetRawSprite(SpriteID sprite);
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bool SpriteExists(SpriteID sprite);
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static inline const Sprite *GetSprite(SpriteID sprite)
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{
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