Examples with MethodNode org.objectweb.asm.tree.MethodNode used on opensource projects

Example 46 with MethodNode

use of org.objectweb.asm.tree.MethodNode in project Random-Things by lumien231.

the class ClassTransformer method patchEntityLivingBase.

private byte[] patchEntityLivingBase(byte[] basicClass) {
    ClassNode classNode = new ClassNode();
    ClassReader classReader = new ClassReader(basicClass);
    classReader.accept(classNode, 0);
    logger.log(Level.DEBUG, "Found EntityLivingBase Class: " + classNode.name);
    MethodNode updatePotionEffects = null;
    MethodNode travel = null;
    for (MethodNode mn : classNode.methods) {
        if (mn.name.equals(MCPNames.method("func_70679_bo"))) {
            updatePotionEffects = mn;
        } else if (mn.name.equals(MCPNames.method("func_191986_a"))) {
            travel = mn;
        }
    }
    if (updatePotionEffects != null) {
        logger.log(Level.DEBUG, "- Found updatePotionEffects (1/2)");
        for (int i = 0; i < updatePotionEffects.instructions.size(); i++) {
            AbstractInsnNode ain = updatePotionEffects.instructions.get(i);
            if (ain instanceof FieldInsnNode) {
                FieldInsnNode fin = (FieldInsnNode) ain;
                if (fin.name.equals(MCPNames.field("field_70180_af"))) {
                    AbstractInsnNode aload = updatePotionEffects.instructions.get(i - 1);
                    InsnList toInsert = new InsnList();
                    LabelNode l1 = new LabelNode(new Label());
                    toInsert.add(new VarInsnNode(ALOAD, 0));
                    toInsert.add(new MethodInsnNode(INVOKESTATIC, asmHandler, "shouldRenderPotionParticles", "(Lnet/minecraft/entity/EntityLivingBase;)Z", false));
                    toInsert.add(new JumpInsnNode(IFGT, l1));
                    toInsert.add(new InsnNode(RETURN));
                    toInsert.add(l1);
                    updatePotionEffects.instructions.insertBefore(aload, toInsert);
                    break;
                }
            }
        }
    }
    if (travel != null) {
        logger.log(Level.DEBUG, "- Found travel (2/2)");
        for (int i = 0; i < travel.instructions.size(); i++) {
            AbstractInsnNode ain = travel.instructions.get(i);
            if (ain instanceof LdcInsnNode) {
                LdcInsnNode lin = (LdcInsnNode) ain;
                if (lin.cst.equals(new Float("0.91"))) {
                    AbstractInsnNode next = travel.instructions.get(i + 1);
                    if (next.getOpcode() == Opcodes.FMUL) {
                        InsnList toInsert = new InsnList();
                        toInsert.add(new VarInsnNode(ALOAD, 0));
                        toInsert.add(new VarInsnNode(ALOAD, 0));
                        toInsert.add(new FieldInsnNode(GETFIELD, "net/minecraft/entity/EntityLivingBase", MCPNames.field("field_70170_p"), "Lnet/minecraft/world/World;"));
                        toInsert.add(new VarInsnNode(ALOAD, 5));
                        toInsert.add(new MethodInsnNode(INVOKEVIRTUAL, "net/minecraft/world/World", MCPNames.method("func_180495_p"), "(Lnet/minecraft/util/math/BlockPos;)Lnet/minecraft/block/state/IBlockState;", false));
                        toInsert.add(new MethodInsnNode(INVOKEINTERFACE, "net/minecraft/block/state/IBlockState", MCPNames.method("func_177230_c"), "()Lnet/minecraft/block/Block;", true));
                        toInsert.add(new MethodInsnNode(INVOKESTATIC, asmHandler, "slipFix", "(FLnet/minecraft/entity/EntityLivingBase;Lnet/minecraft/block/Block;)F", false));
                        travel.instructions.insert(next, toInsert);
                        i += 6;
                    }
                }
            }
        }
    }
    CustomClassWriter writer = new CustomClassWriter(ClassWriter.COMPUTE_MAXS | ClassWriter.COMPUTE_FRAMES);
    classNode.accept(writer);
    return writer.toByteArray();
}

Example 47 with MethodNode

use of org.objectweb.asm.tree.MethodNode in project Random-Things by lumien231.

the class ClassTransformer method patchEntitySlime.

private byte[] patchEntitySlime(byte[] basicClass) {
    ClassNode classNode = new ClassNode();
    ClassReader classReader = new ClassReader(basicClass);
    classReader.accept(classNode, 0);
    logger.log(Level.DEBUG, "Found EntitySlime Class: " + classNode.name);
    MethodNode getCanSpawnHere = null;
    for (MethodNode mn : classNode.methods) {
        if (mn.name.equals(MCPNames.method("func_70601_bi"))) {
            getCanSpawnHere = mn;
            break;
        }
    }
    if (getCanSpawnHere != null) {
        logger.log(Level.DEBUG, " - Found getCanSpawnHere");
        for (int i = 0; i < getCanSpawnHere.instructions.size(); i++) {
            AbstractInsnNode ain = getCanSpawnHere.instructions.get(i);
            if (ain instanceof FieldInsnNode) {
                FieldInsnNode fin = (FieldInsnNode) ain;
                if (fin.name.equals("PEACEFUL")) {
                    logger.log(Level.DEBUG, " - Found Insertion Point");
                    AbstractInsnNode skip = getCanSpawnHere.instructions.get(i + 1);
                    LabelNode l0 = new LabelNode(new Label());
                    InsnList toInsert = new InsnList();
                    toInsert.add(new VarInsnNode(ALOAD, 0));
                    toInsert.add(new FieldInsnNode(Opcodes.GETFIELD, "net/minecraft/entity/monster/EntitySlime", MCPNames.field("field_70170_p"), "Lnet/minecraft/world/World;"));
                    toInsert.add(new VarInsnNode(ALOAD, 2));
                    toInsert.add(new MethodInsnNode(INVOKESTATIC, asmHandler, "overrideSlimeChunk", "(Lnet/minecraft/world/World;Lnet/minecraft/world/chunk/Chunk;)I", false));
                    toInsert.add(new InsnNode(DUP));
                    toInsert.add(new JumpInsnNode(IFLT, l0));
                    toInsert.add(new InsnNode(IRETURN));
                    toInsert.add(l0);
                    toInsert.add(new InsnNode(POP));
                    getCanSpawnHere.instructions.insert(skip, toInsert);
                }
            }
        }
    }
    CustomClassWriter writer = new CustomClassWriter(ClassWriter.COMPUTE_MAXS | ClassWriter.COMPUTE_FRAMES);
    classNode.accept(writer);
    return writer.toByteArray();
}

Example 48 with MethodNode

use of org.objectweb.asm.tree.MethodNode in project Random-Things by lumien231.

the class ClassTransformer method patchRenderItem.

private byte[] patchRenderItem(byte[] basicClass) {
    ClassNode classNode = new ClassNode();
    ClassReader classReader = new ClassReader(basicClass);
    classReader.accept(classNode, 0);
    logger.log(Level.DEBUG, "Found RenderItem Class: " + classNode.name);
    MethodNode renderEffect = null;
    MethodNode renderItem = null;
    MethodNode renderQuads = null;
    for (MethodNode mn : classNode.methods) {
        if (mn.name.equals(MCPNames.method("func_191966_a"))) {
            renderEffect = mn;
        } else if (mn.name.equals(MCPNames.method("func_180454_a")) && mn.desc.equals("(Lnet/minecraft/item/ItemStack;Lnet/minecraft/client/renderer/block/model/IBakedModel;)V")) {
            renderItem = mn;
        } else if (mn.name.equals(MCPNames.method("func_191970_a"))) {
            renderQuads = mn;
        }
    }
    if (renderEffect != null) {
        logger.log(Level.DEBUG, "- Found renderEffect (1/3)");
        renderEffect.instructions.insert(new MethodInsnNode(INVOKESTATIC, asmHandler, "preEnchantment", "()V", false));
        for (int i = 0; i < renderEffect.instructions.size(); i++) {
            AbstractInsnNode ain = renderEffect.instructions.get(i);
            if (ain instanceof LdcInsnNode) {
                LdcInsnNode lin = (LdcInsnNode) ain;
                if (lin.cst.equals(new Integer(-8372020))) {
                    logger.log(Level.DEBUG, "- Found Texture Binding");
                    renderEffect.instructions.insert(lin, new MethodInsnNode(INVOKESTATIC, asmHandler, "enchantmentColorHook", "(I)I", false));
                }
            } else if (ain.getOpcode() == RETURN) {
                renderEffect.instructions.insertBefore(ain, new MethodInsnNode(INVOKESTATIC, asmHandler, "postEnchantment", "()V", false));
                i++;
            }
        }
    }
    if (renderItem != null) {
        boolean found = false;
        logger.log(Level.DEBUG, "- Found renderItem (2/3) (" + renderItem.desc + ")");
        for (int i = 0; i < renderItem.instructions.size(); i++) {
            AbstractInsnNode ain = renderItem.instructions.get(i);
            if (ain instanceof MethodInsnNode) {
                MethodInsnNode min = (MethodInsnNode) ain;
                if (!found) {
                    if (min.name.equals(MCPNames.method("func_191966_a"))) {
                        logger.log(Level.DEBUG, "- Found renderEffect calling");
                        InsnList toInsert = new InsnList();
                        toInsert.add(new VarInsnNode(ALOAD, 1));
                        toInsert.add(new FieldInsnNode(PUTSTATIC, asmHandler, "currentlyRendering", "Lnet/minecraft/item/ItemStack;"));
                        renderItem.instructions.insertBefore(min, toInsert);
                        toInsert = new InsnList();
                        toInsert.add(new InsnNode(ACONST_NULL));
                        toInsert.add(new FieldInsnNode(PUTSTATIC, asmHandler, "currentlyRendering", "Lnet/minecraft/item/ItemStack;"));
                        renderItem.instructions.insert(min, toInsert);
                        found = true;
                    }
                }
                if (min.name.equals(MCPNames.method("func_179022_a"))) {
                    LabelNode l1 = new LabelNode(new Label());
                    LabelNode l2 = new LabelNode(new Label());
                    logger.log(Level.DEBUG, "- Inserting TE Item Renderer");
                    InsnList insertBefore = new InsnList();
                    insertBefore.add(new FieldInsnNode(GETSTATIC, "lumien/randomthings/client/RandomThingsTEItemRenderer", "instance", "Llumien/randomthings/client/RandomThingsTEItemRenderer;"));
                    insertBefore.add(new VarInsnNode(ALOAD, 1));
                    insertBefore.add(new MethodInsnNode(INVOKEVIRTUAL, "lumien/randomthings/client/RandomThingsTEItemRenderer", "renderByItem", "(Lnet/minecraft/item/ItemStack;)Z", false));
                    insertBefore.add(new JumpInsnNode(IFEQ, l2));
                    insertBefore.add(new InsnNode(POP));
                    insertBefore.add(new InsnNode(POP));
                    insertBefore.add(new JumpInsnNode(GOTO, l1));
                    insertBefore.add(l2);
                    InsnList insertAfter = new InsnList();
                    insertAfter.add(l1);
                    renderItem.instructions.insertBefore(min, insertBefore);
                    renderItem.instructions.insert(min, insertAfter);
                    i += 8;
                }
            }
        }
    }
    if (renderQuads != null) {
        logger.log(Level.DEBUG, "- Found renderQuads (3/3) (" + renderQuads.desc + ")");
        String luminousHandler = "lumien/randomthings/handler/LuminousHandler";
        InsnList startInsrt = new InsnList();
        startInsrt.add(new VarInsnNode(ALOAD, 4));
        startInsrt.add(new VarInsnNode(ALOAD, 1));
        startInsrt.add(new MethodInsnNode(INVOKESTATIC, luminousHandler, "luminousHookStart", "(Lnet/minecraft/item/ItemStack;Lnet/minecraft/client/renderer/BufferBuilder;)V", false));
        renderQuads.instructions.insert(startInsrt);
        for (int i = 0; i < renderQuads.instructions.size(); i++) {
            AbstractInsnNode ain = renderQuads.instructions.get(i);
            if (ain instanceof MethodInsnNode) {
                MethodInsnNode min = (MethodInsnNode) ain;
                if (min.name.equals("renderQuadColor")) {
                    InsnList toInsert = new InsnList();
                    toInsert.add(new VarInsnNode(ALOAD, 8));
                    toInsert.add(new MethodInsnNode(INVOKEVIRTUAL, "net/minecraft/client/renderer/block/model/BakedQuad", MCPNames.method("func_178211_c"), "()I", false));
                    toInsert.add(new MethodInsnNode(INVOKESTATIC, luminousHandler, "luminousHookPre", "(I)V", false));
                    toInsert.add(new InsnNode(POP));
                    toInsert.add(new VarInsnNode(ALOAD, 4));
                    toInsert.add(new VarInsnNode(ILOAD, 9));
                    toInsert.add(new MethodInsnNode(INVOKESTATIC, asmHandler, "getColorFromItemStack", "(Lnet/minecraft/item/ItemStack;I)I", false));
                    renderQuads.instructions.insertBefore(min, toInsert);
                    i += 7;
                    renderQuads.instructions.insert(min, new MethodInsnNode(INVOKESTATIC, luminousHandler, "luminousHookPost", "()V", false));
                }
            } else if (ain.getOpcode() == RETURN) {
                renderQuads.instructions.insertBefore(ain, new MethodInsnNode(INVOKESTATIC, luminousHandler, "luminousHookEnd", "()V", false));
                i++;
            }
        }
    }
    CustomClassWriter writer = new CustomClassWriter(ClassWriter.COMPUTE_MAXS | ClassWriter.COMPUTE_FRAMES);
    classNode.accept(writer);
    return writer.toByteArray();
}

Example 49 with MethodNode

use of org.objectweb.asm.tree.MethodNode in project Random-Things by lumien231.

the class ClassTransformer method patchBlock.

private byte[] patchBlock(byte[] basicClass) {
    ClassNode classNode = new ClassNode();
    ClassReader classReader = new ClassReader(basicClass);
    classReader.accept(classNode, 0);
    logger.log(Level.DEBUG, "Found Block Class: " + classNode.name);
    MethodNode addCollisionBoxesToList = null;
    for (MethodNode mn : classNode.methods) {
        if (mn.name.equals(MCPNames.method("func_185477_a")) && mn.desc.equals("(Lnet/minecraft/block/state/IBlockState;Lnet/minecraft/world/World;Lnet/minecraft/util/math/BlockPos;Lnet/minecraft/util/math/AxisAlignedBB;Ljava/util/List;Lnet/minecraft/entity/Entity;Z)V")) {
            addCollisionBoxesToList = mn;
        }
    }
    if (addCollisionBoxesToList != null) {
        logger.log(Level.DEBUG, "- Found addCollisionBoxesToList (1/1)");
        InsnList toInsert = new InsnList();
        LabelNode l1 = new LabelNode(new Label());
        toInsert.add(new VarInsnNode(ALOAD, 1));
        toInsert.add(new VarInsnNode(ALOAD, 2));
        toInsert.add(new VarInsnNode(ALOAD, 3));
        toInsert.add(new VarInsnNode(ALOAD, 4));
        toInsert.add(new VarInsnNode(ALOAD, 5));
        toInsert.add(new VarInsnNode(ALOAD, 6));
        toInsert.add(new MethodInsnNode(INVOKESTATIC, asmHandler, "addCollisionBoxesToList", "(Lnet/minecraft/block/state/IBlockState;Lnet/minecraft/world/World;Lnet/minecraft/util/math/BlockPos;Lnet/minecraft/util/math/AxisAlignedBB;Ljava/util/List;Lnet/minecraft/entity/Entity;)Z", false));
        toInsert.add(new JumpInsnNode(IFEQ, l1));
        toInsert.add(new InsnNode(RETURN));
        toInsert.add(l1);
        addCollisionBoxesToList.instructions.insert(toInsert);
    }
    CustomClassWriter writer = new CustomClassWriter(ClassWriter.COMPUTE_MAXS | ClassWriter.COMPUTE_FRAMES);
    classNode.accept(writer);
    return writer.toByteArray();
}

Example 50 with MethodNode

use of org.objectweb.asm.tree.MethodNode in project Random-Things by lumien231.

the class ClassTransformer method patchLayerArmorBase.

private byte[] patchLayerArmorBase(byte[] basicClass) {
    ClassNode classNode = new ClassNode();
    ClassReader classReader = new ClassReader(basicClass);
    classReader.accept(classNode, 0);
    logger.log(Level.DEBUG, "Found LayerArmorBase Class: " + classNode.name);
    // Where the effect is rendered
    MethodNode renderEnchantedGlint = null;
    // Getting ItemStack from here
    MethodNode renderArmorLayer = null;
    for (MethodNode mn : classNode.methods) {
        if (mn.name.equals(MCPNames.method("func_188364_a"))) {
            renderEnchantedGlint = mn;
        } else if (mn.name.equals(MCPNames.method("func_188361_a"))) {
            renderArmorLayer = mn;
        }
    }
    if (renderEnchantedGlint != null) {
        logger.log(Level.DEBUG, "- Found renderEnchantedGlint (Effect Rendering 1/2)");
        renderEnchantedGlint.instructions.insert(new MethodInsnNode(INVOKESTATIC, asmHandler, "preEnchantment", "()V", false));
        for (int i = 0; i < renderEnchantedGlint.instructions.size(); i++) {
            AbstractInsnNode ain = renderEnchantedGlint.instructions.get(i);
            if (ain instanceof MethodInsnNode) {
                MethodInsnNode min = (MethodInsnNode) ain;
                if (min.owner.equals("net/minecraft/client/renderer/GlStateManager") && min.name.equals(MCPNames.method("func_179131_c"))) {
                    renderEnchantedGlint.instructions.insert(min, new MethodInsnNode(INVOKESTATIC, asmHandler, "armorEnchantmentHook", "()V", false));
                }
            } else if (ain.getOpcode() == RETURN) {
                renderEnchantedGlint.instructions.insertBefore(ain, new MethodInsnNode(INVOKESTATIC, asmHandler, "postEnchantment", "()V", false));
                i++;
            }
        }
    }
    int renderCounter = 0;
    if (renderArmorLayer != null) {
        logger.log(Level.DEBUG, "- Found renderArmorLayer (ItemStack Information & Armor Coloring 2/2)");
        for (int i = 0; i < renderArmorLayer.instructions.size(); i++) {
            AbstractInsnNode ain = renderArmorLayer.instructions.get(i);
            if (ain instanceof MethodInsnNode) {
                MethodInsnNode min = (MethodInsnNode) ain;
                if (min.name.equals(MCPNames.method("func_188364_a"))) {
                    logger.log(Level.DEBUG, "- Set currentlyRendering");
                    InsnList toInsert = new InsnList();
                    toInsert.add(new VarInsnNode(ALOAD, 10));
                    toInsert.add(new FieldInsnNode(PUTSTATIC, asmHandler, "currentlyRendering", "Lnet/minecraft/item/ItemStack;"));
                    renderArmorLayer.instructions.insertBefore(min, toInsert);
                    toInsert = new InsnList();
                    toInsert.add(new InsnNode(ACONST_NULL));
                    toInsert.add(new FieldInsnNode(PUTSTATIC, asmHandler, "currentlyRendering", "Lnet/minecraft/item/ItemStack;"));
                    renderArmorLayer.instructions.insert(min, toInsert);
                    i += 2;
                }
                if (min.name.equals(MCPNames.method("func_78088_a"))) {
                    if (renderCounter == 1) {
                        logger.log(Level.DEBUG, "- Found render");
                        InsnList toInsert = new InsnList();
                        toInsert.add(new VarInsnNode(ALOAD, 10));
                        toInsert.add(new MethodInsnNode(INVOKESTATIC, asmHandler, "armorColorHook", "(Lnet/minecraft/item/ItemStack;)V", false));
                        renderArmorLayer.instructions.insertBefore(min, toInsert);
                    }
                    renderCounter++;
                }
            }
        }
    }
    CustomClassWriter writer = new CustomClassWriter(ClassWriter.COMPUTE_MAXS | ClassWriter.COMPUTE_FRAMES);
    classNode.accept(writer);
    return writer.toByteArray();
}