Configuration Legacy

Mixin Configuration (legacy)

This page documents the legacy patches for Minecraft 1.7.10, 1.8.9 and 1.12.2, on Forge and on Ornithe. For Minecraft 1.16.5 - 26.3 see Mixin Configuration.

These builds live in a separate source tree with their own Gradle setup and carry a much smaller patch set. Forge: 4 patches on 1.7.10, 8 on 1.8.9, 12 on 1.12.2. Ornithe: 6 patches on 1.7.10, 10 on 1.8.9, 11 on 1.12.2.

Requirements

Lomka does not bundle a mixin runtime on these versions. Install one alongside it:

Minecraft	Required
1.7.10	UniMixins (1.7.10-0.3.1+)
1.8.9	MixinBooter 11.17+
1.12.2	MixinBooter 11.17+
Ornithe, any version	nothing — the Ornithe loader ships sponge-mixin and the access widener itself

The dependency is declared to the loader itself on 1.8.9 and 1.12.2 (mixinbooter:[11.17,) in mcmod.info). On 1.7.10 nothing is declared, because UniMixins ships no mod id for FML to resolve — set the requirement on the mod platform page instead.

No Fabric API, no library, no core mod.

How the toggle works

The same mechanism as the modern builds: on first launch a comment-only config/lomka-mixins.properties is created, and every line you add forces one patch on or off.

# fully qualified mixin name = true|false
net.minecraft.util.MixinEnumFacing = false

• Missing keys always mean enabled. Patches added by an update work without editing the file.
• The fully qualified name, the name without the lomka.starl.mixins. prefix, and the simple class name (MixinEnumFacing) all resolve to the same patch.
• Only true / 1 enable; anything else disables the patch.
• Keys that are not in your build are reported once at startup as unknown key(s) ignored, and disabled patches as Disabled N mixin(s): ....
• Deleting the file restores the all-enabled default.

Warning: disabling patches reduces performance and may change behavior. Unlike the modern tree there are no inter-dependent patch pairs here, so any single patch can be turned off safely.

The plugin is lomka.starl.config.LomkaMixinPlugin. It is a separate class from the modern one, written for Java 8: it uses Log4j instead of SLF4J (SLF4J only arrives in Minecraft 1.17), and it validates keys by reading the lomka.mixins.json inside its own jar without Gson, which would need a version those games do not ship. It sets no JOML system properties — these versions use Mojang math.

Patches

The tables below are the Forge tree. Ornithe is a separate source tree with its own keys - see Ornithe patches below.

Forge client patches

Key	Description	Versions
net.minecraft.client.MixinMinecraft	Redirects away the Thread.yield() at the end of every runGameLoop. It is a scheduler hint rather than a real optimization — recorded so the trade (very slightly more CPU for lower input latency) is visible.	all
net.minecraft.client.resources.MixinAbstractResourcePack	pack.mcmeta is parsed once per pack instead of on every metadata query (three call sites per pack per resource reload), and locationToName loses its String.format. Loading path, not frame path.	all
net.minecraft.client.shader.MixinFramebuffer	The fullscreen blit quad and its half-dozen state toggles are replaced with one hardware glBlitFramebuffer(NEAREST) when blending is off.	1.8.9, 1.12.2
net.minecraft.client.resources.MixinFallbackResourceManager	The .mcmeta location is built only once a pack actually has metadata, instead of one string concat plus one ResourceLocation per lookup before any pack is consulted.	1.12.2

Forge common patches

These are registered in the common mixins list, so they apply on a dedicated server too.

Key	Description	Versions
net.minecraft.util.math.MixinMathHelper	smallestEncompassingPowerOfTwo / log2: the five-step bit spread and the De Bruijn table lookup replaced with a single Integer.numberOfLeadingZeros intrinsic, reproducing vanilla's edge cases exactly.	all
net.minecraft.util.MixinAxisAlignedBB	calculateIntercept with the candidate point kept in locals: vanilla allocates one Vec3 per plane it tests, up to six per ray trace. Bit-identical over a million fuzzed ray/box pairs.	1.7.10, 1.8.9
net.minecraft.util.math.MixinAxisAlignedBB	The 1.12 half of the same patch. It is a separate file only because the AxisAlignedBB package itself moves at 1.12, so one file could not keep its own path consistent with its package across the three builds.	1.12.2
net.minecraft.util.MixinEnumFacing	rotateAround and its counter-clockwise sibling via flat lookup tables instead of nested enum dispatch. getOpposite and random are deliberately left alone — PolyPatcher already overwrites both with byte-identical bodies.	1.8.9, 1.12.2
net.minecraft.util.math.MixinVec3i	hashCode via phi-mix instead of vanilla's weak (y + z * 31) * 31 + x, which collapses a large share of a dense 64³ region onto few distinct values. priority = 999, so a foreign hashing mod lands on top.	1.8.9, 1.12.2
net.minecraft.nbt.MixinNBTTagIntArray	Bulk load on a DataInputStream — 8 KB blocks through a big-endian ByteBuffer instead of four read() calls per element. Disk path only (region files, player data, level.dat); network and buffer inputs keep vanilla's loop.	1.8.9, 1.12.2
net.minecraft.nbt.MixinNBTTagLongArray	The same for long[]. Chunk Heightmaps are long arrays, which is where it pays on a server.	1.12.2
net.minecraft.network.MixinNettyCompressionEncoder	The per-packet new byte[readableBytes] is reused, and only stored back when it stays under 64 KB so one oversized chunk packet cannot pin a permanent high-water buffer.	1.12.2
net.minecraft.network.MixinNettyCompressionDecoder	The same reuse for the compressed payload. The output array is still a fresh one, because it escapes into the pipeline.	1.12.2

Ornithe patches

Ornithe is a second source tree rather than a loader switch: the Feather mappings it compiles against name classes the way 1.16+ does (Box, Direction, NbtIntArray), a different namespace from the MCP names the Forge tree has to use. The two trees share only the pure-math kernels, so none of these keys overlap with the Forge ones above.

Versions shows which Ornithe builds contain the patch.

Key	Description	Versions
net.minecraft.client.MixinMinecraft	Redirects away the Thread.yield() at the end of every runGameLoop, as on Forge	all
net.minecraft.client.resource.manager.MixinFallbackResourceManager	The .mcmeta location is built only once a pack actually has metadata. Forge carries this patch on 1.12.2 only under its MCP name; here it is the Feather name and runs on all three versions	all
net.minecraft.client.render.pipeline.MixinRenderTarget	The fullscreen blit quad and its state toggles replaced with one hardware glBlitFramebuffer(NEAREST) — the RenderTarget#draw(int, int, boolean) present, which is the Forge MixinFramebuffer patch under the Feather name	1.8.9, 1.12.2
net.minecraft.util.math.MixinMathHelper	smallestEncompassingPowerOfTwo / log2 through a single Integer.numberOfLeadingZeros intrinsic, as on Forge	all
net.minecraft.util.math.MixinVec3i	hashCode via phi-mix, priority = 999 so a foreign hashing mod lands on top	all
net.minecraft.util.math.MixinBox	The ray trace of Box#clip, the Feather-named half of the Forge MixinAxisAlignedBB patch: the candidate point stays in locals instead of one Vec3d per plane tested	all
net.minecraft.util.math.MixinDirection	Direction#clockwise(Axis) through a flat lookup table anchored on the three private clockwise helpers	1.8.9, 1.12.2
net.minecraft.nbt.MixinNbtIntArray	Bulk load on a DataInputStream — 8 KB blocks through a big-endian ByteBuffer instead of four read() calls per element. Disk path only; network and buffer inputs keep vanilla's loop	all
net.minecraft.nbt.MixinNbtLongArray	The same for long[]; chunk Heightmaps are long arrays, which is where it pays on a server	1.12.2
net.minecraft.network.MixinCompressionEncoder	The per-packet buffer is reused and shrunk again past 64 KB, so one oversized chunk packet cannot pin a high-water buffer	1.8.9, 1.12.2
net.minecraft.network.MixinCompressionDecoder	The same reuse for the compressed payload; the output array stays fresh because it escapes into the pipeline	1.8.9, 1.12.2

Ornithe requires nothing from the player: the loader ships sponge-mixin and the access widener itself, so there is no MixinBooter / UniMixins dependency, no mcmod.info dependency block to get the modid:range format right, and no core mod.

Shared helpers

Two non-mixin classes, outside the mixin package for the same reason as the modern tree:

• lomka.starl.utils.constants.EnumFacingTables (Forge) and lomka.starl.utils.constants.DirectionTables (Ornithe) — the 18-entry clockwise table read, by MixinEnumFacing and MixinDirection. Kept outside the mixin package on purpose: a class inside a configured mixin package cannot be loaded by the mixin plugin loader.
• lomka.starl.utils.nbt.NbtBulkReader — the thread-local 8 KB scratch and the block-size thresholds shared by the two NBT array patches. Thread-local because chunk NBT is read on the server's IO workers; created lazily so a client that never reads a chunk pays nothing.