diff options
| -rw-r--r-- | src/newgrf.cpp | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/src/newgrf.cpp b/src/newgrf.cpp index c9a78deb9..cf45608b6 100644 --- a/src/newgrf.cpp +++ b/src/newgrf.cpp @@ -6421,8 +6421,8 @@ static void SafeParamSet(ByteReader *buf) { uint8 target = buf->ReadByte(); - /* Only writing GRF parameters is considered safe */ - if (target < 0x80) return; + /* Writing GRF parameters and some bits of 'misc GRF features' are safe. */ + if (target < 0x80 || target == 0x9E) return; /* GRM could be unsafe, but as here it can only happen after other GRFs * are loaded, it should be okay. If the GRF tried to use the slots it @@ -6838,7 +6838,15 @@ static void ParamSet(ByteReader *buf) /* Remove the local flags from the global flags */ ClrBit(res, GMB_TRAIN_WIDTH_32_PIXELS); - _misc_grf_features = res; + /* Only copy safe bits for static grfs */ + if (HasBit(_cur.grfconfig->flags, GCF_STATIC)) { + uint32 safe_bits = 0; + SetBit(safe_bits, GMB_SECOND_ROCKY_TILE_SET); + + _misc_grf_features = (_misc_grf_features & ~safe_bits) | (res & safe_bits); + } else { + _misc_grf_features = res; + } break; case 0x9F: // locale-dependent settings |