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Fix NodeDef backwards compatibility to 5.3.0 (#11942) 

1. Fixes crashes on older clients when [png is used as base image
2. Fixes liquid type assertion fails on debug builds
This commit is contained in:
SmallJoker 2022-01-12 18:49:14 +01:00 committed by GitHub
parent 4c8c649779
commit b2eb44afc5
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 21 additions and 2 deletions
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23
src/nodedef.cpp
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@ -207,7 +207,17 @@ void TileDef::serialize(std::ostream &os, u16 protocol_version) const
u8 version = 6;
writeU8(os, version);
os << serializeString16(name);
if (protocol_version > 39) {
os << serializeString16(name);
} else {
// Before f018737, TextureSource::getTextureAverageColor did not handle
// missing textures. "[png" can be used as base texture, but is not known
// on older clients. Hence use "blank.png" to avoid this problem.
if (!name.empty() && name[0] == '[')
os << serializeString16("blank.png^" + name);
else
os << serializeString16(name);
}
animation.serialize(os, version);
bool has_scale = scale > 0;
u16 flags = 0;
@ -491,7 +501,16 @@ void ContentFeatures::serialize(std::ostream &os, u16 protocol_version) const
writeU32(os, damage_per_second);
// liquid
writeU8(os, liquid_type);
LiquidType liquid_type_bc = liquid_type;
if (protocol_version <= 39) {
// Since commit 7f25823, liquid drawtypes can be used even with LIQUID_NONE
// solution: force liquid type accordingly to accepted values
if (drawtype == NDT_LIQUID)
liquid_type_bc = LIQUID_SOURCE;
else if (drawtype == NDT_FLOWINGLIQUID)
liquid_type_bc = LIQUID_FLOWING;
}
writeU8(os, liquid_type_bc);
os << serializeString16(liquid_alternative_flowing);
os << serializeString16(liquid_alternative_source);
writeU8(os, liquid_viscosity);