86 lines
2.9 KiB
Java
86 lines
2.9 KiB
Java
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package biomesoplenty.asm.smoothing.block;
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import static org.objectweb.asm.Opcodes.ALOAD;
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import static org.objectweb.asm.Opcodes.ICONST_0;
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import static org.objectweb.asm.Opcodes.ILOAD;
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import static org.objectweb.asm.Opcodes.INVOKESTATIC;
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import static org.objectweb.asm.Opcodes.IRETURN;
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import java.util.Iterator;
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import org.objectweb.asm.ClassReader;
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import org.objectweb.asm.ClassWriter;
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import org.objectweb.asm.tree.AbstractInsnNode;
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import org.objectweb.asm.tree.ClassNode;
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import org.objectweb.asm.tree.InsnList;
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import org.objectweb.asm.tree.InsnNode;
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import org.objectweb.asm.tree.MethodInsnNode;
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import org.objectweb.asm.tree.MethodNode;
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import org.objectweb.asm.tree.VarInsnNode;
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import net.minecraft.world.IBlockAccess;
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import net.minecraft.world.biome.BiomeGenBase;
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public class BlockFluid
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{
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public static byte[] patchColourMultiplier(String name, byte[] bytes, boolean obfuscated)
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{
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String targetMethodName = "";
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if (obfuscated)
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targetMethodName ="b";
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else
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targetMethodName ="colorMultiplier";
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ClassNode classNode = new ClassNode();
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ClassReader classReader = new ClassReader(bytes);
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classReader.accept(classNode, 0);
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Iterator<MethodNode> methods = classNode.methods.iterator();
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while (methods.hasNext())
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{
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MethodNode m = methods.next();
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int fdiv_index = -1;
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if (m.name.equals(targetMethodName) && (m.desc.equals("(Lnet/minecraft/world/IBlockAccess;III)I") || m.desc.equals("(Lcf;III)I")))
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{
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AbstractInsnNode currentNode = null;
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AbstractInsnNode targetNode = null;
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Iterator<AbstractInsnNode> iter = m.instructions.iterator();
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int index = -1;
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while (iter.hasNext())
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{
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index++;
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currentNode = iter.next();
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if (currentNode.getOpcode() == ICONST_0)
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{
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targetNode = currentNode;
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fdiv_index = index;
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}
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}
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InsnList toInject = new InsnList();
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toInject.add(new VarInsnNode(ALOAD, 1));
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toInject.add(new VarInsnNode(ILOAD, 2));
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toInject.add(new VarInsnNode(ILOAD, 3));
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toInject.add(new VarInsnNode(ILOAD, 4));
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toInject.add(new MethodInsnNode(INVOKESTATIC, "biomesoplenty/asm/smoothing/BOPBiomeTransitionSmoothing", "getWaterColourMultiplier", "(Lnet/minecraft/world/IBlockAccess;III)I"));
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toInject.add(new InsnNode(IRETURN));
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m.instructions.insertBefore(targetNode, toInject);
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break;
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}
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}
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ClassWriter writer = new ClassWriter(ClassWriter.COMPUTE_MAXS | ClassWriter.COMPUTE_FRAMES);
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classNode.accept(writer);
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return writer.toByteArray();
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}
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}
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