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Add particle blend mode "clip" (#15444)

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This lets modders avoid alpha blending rendering bugs as well as potential (future) performance issues.
The appropriate blend modes are also used for node dig particles.

---------

Co-authored-by: sfan5 <sfan5@live.de>
This commit is contained in:
Lars Müller 2024-11-19 13:30:17 +01:00 • committed by GitHub
parent f493e73aeb
commit 138052adfc
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GPG key ID: B5690EEEBB952194
11 changed files with 93 additions and 33 deletions
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8
src/particles.cpp
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@ -190,8 +190,10 @@ void ServerParticleTexture::serialize(std::ostream &os, u16 protocol_ver,
FlagT flags = 0;
if (animated)
flags |= FlagT(ParticleTextureFlags::animated);
if (blendmode != BlendMode::alpha)
flags |= FlagT(blendmode) << 1;
// Default to `blend = "alpha"` for older clients that don't support `blend = "clip"`
auto sent_blendmode = (protocol_ver < 47 && blendmode == BlendMode::clip)
? BlendMode::alpha : blendmode;
flags |= FlagT(sent_blendmode) << 1;
serializeParameterValue(os, flags);
alpha.serialize(os);
@ -215,6 +217,8 @@ void ServerParticleTexture::deSerialize(std::istream &is, u16 protocol_ver,
animated = !!(flags & FlagT(ParticleTextureFlags::animated));
blendmode = BlendMode((flags & FlagT(ParticleTextureFlags::blend)) >> 1);
if (blendmode >= BlendMode::BlendMode_END)
throw SerializationError("invalid blend mode");
alpha.deSerialize(is);
scale.deSerialize(is);