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Initial commit from the source zip for version 2.3.18
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Raven Szewczyk committed
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package shadersmodcore.transform;
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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.ClassVisitor;
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import org.objectweb.asm.ClassWriter;
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import org.objectweb.asm.FieldVisitor;
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import org.objectweb.asm.Label;
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import org.objectweb.asm.MethodVisitor;
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import org.objectweb.asm.Opcodes;
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import static org.objectweb.asm.Opcodes.*;
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import org.objectweb.asm.commons.Remapper;
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import org.objectweb.asm.tree.MethodNode;
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import net.minecraft.launchwrapper.IClassTransformer;
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public class SMCCTTextureMap implements IClassTransformer {
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@Override
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public byte[] transform(String par1, String par2, byte[] par3) {
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SMCLog.fine("transforming %s %s",par1,par2);
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ClassReader cr = new ClassReader(par3);
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ClassWriter cw = new ClassWriter(cr, ClassWriter.COMPUTE_MAXS);
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CVTransform cv = new CVTransform(cw);
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cr.accept(cv,0);
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return cw.toByteArray();
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}
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private static class CVTransform extends ClassVisitor
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{
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String classname;
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boolean endFields = false;
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public CVTransform(ClassVisitor cv)
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{
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super(Opcodes.ASM4, cv);
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}
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@Override
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public void visit(int version, int access, String name,
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String signature, String superName, String[] interfaces) {
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classname = name;
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//SMCLog.info(" class %s",name);
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cv.visit(version, access, name, signature, superName, interfaces);
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}
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@Override
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public FieldVisitor visitField(int access, String name, String desc,
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String signature, Object value) {
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if (name.equals("atlasWidth")) {
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return null;
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} else if (name.equals("atlasHeight")) {
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return null;
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} else if (Names.textureMap_anisotropic.name.equals(name)) {
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access = access & (~ACC_PRIVATE & ~ACC_PROTECTED) | ACC_PUBLIC;
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}
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return super.visitField(access, name, desc, signature, value);
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}
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@Override
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public MethodVisitor visitMethod(int access, String name, String desc,
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String signature, String[] exceptions)
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{
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if (!endFields) {
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endFields = true;
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FieldVisitor fv;
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fv = cv.visitField(ACC_PUBLIC, "atlasWidth", "I", null, null);
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fv.visitEnd();
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fv = cv.visitField(ACC_PUBLIC, "atlasHeight", "I", null, null);
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fv.visitEnd();
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}
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//SMCLog.info(" method %s.%s%s = %s",classname,name,desc,remappedName);
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if (Names.textureMap_getIconResLoc.equalsNameDesc(name, desc))
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{
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access = access & (~ACC_PRIVATE & ~ACC_PROTECTED) | ACC_PUBLIC;
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}
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else
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if (Names.textureMap_loadTextureAtlas.equalsNameDesc(name, desc))
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{
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//SMCLog.finer(" patching method %s.%s%s = %s",classname,name,desc,nameM);
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return new MVloadAtlas(cv.visitMethod(access, name, desc, signature, exceptions));
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}
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else
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if (Names.textureMap_updateAnimations.equalsNameDesc(name, desc))
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{
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//SMCLog.finer(" patching method %s.%s%s = %s",classname,name,desc,nameM);
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return new MVanimation(cv.visitMethod(access, name, desc, signature, exceptions));
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}
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return cv.visitMethod(access, name, desc, signature, exceptions);
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}
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}
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private static class MVloadAtlas extends MethodVisitor
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{
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//protected MethodVisitor mv;
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public MVloadAtlas(MethodVisitor mv) {
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super(Opcodes.ASM4, mv);
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//this.mv = mv;
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}
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@Override
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public void visitIntInsn(int opcode, int operand) {
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if (opcode == NEWARRAY && operand == T_INT) {
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mv.visitInsn(ICONST_3);
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mv.visitInsn(IMUL);
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}
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mv.visitIntInsn(opcode, operand);
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}
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int varStitcher = 0;
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boolean isStitcher = false;
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int state = 0;
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@Override
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public void visitVarInsn(int opcode, int var) {
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if (opcode==ASTORE) {
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if (isStitcher) {
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isStitcher = false;
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varStitcher = var;
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}
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}
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mv.visitVarInsn(opcode, var);
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}
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@Override
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public void visitMethodInsn(int opcode, String owner, String name,String desc) {
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//SMCLog.finest(" %s.%s%s",ownerM,nameM,descM);
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if (Names.iResourceManager_getResource.equals(owner,name,desc)) {
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SMCLog.finest(" %s","loadRes");
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mv.visitMethodInsn(INVOKESTATIC, "shadersmodcore/client/ShadersTex", "loadResource", "("+Names.iResourceManager_.desc+Names.resourceLocation_.desc+")"+Names.iResource_.desc);
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return;
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}
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else if (opcode==INVOKESPECIAL && Names.equals(Names.stitcher_.clas,"<init>","(IIZII)V",owner,name,desc)) {
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isStitcher = true;
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}
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else if (Names.textureUtil_allocateTextureMipmapAniso.equals(owner,name,desc)) {
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SMCLog.finest(" %s","allocateTextureMap");
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mv.visitVarInsn(ALOAD, varStitcher);
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mv.visitVarInsn(ALOAD, 0);
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mv.visitMethodInsn(INVOKESTATIC, "shadersmodcore/client/ShadersTex", "allocateTextureMap", "(IIIIF"+Names.stitcher_.desc+Names.textureMap_.desc+")V");
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state = 1;
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return;
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}
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else if (state==1 &&
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Names.textureAtlasSpri_getIconName.equals(owner,name,desc)) {
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SMCLog.finest(" %s","setSprite setIconName");
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mv.visitMethodInsn(INVOKESTATIC, "shadersmodcore/client/ShadersTex", "setSprite", "("+Names.textureAtlasSpri_.desc+")"+Names.textureAtlasSpri_.desc);
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mv.visitMethodInsn(opcode, owner, name, desc);
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mv.visitMethodInsn(INVOKESTATIC, "shadersmodcore/client/ShadersTex", "setIconName", "(Ljava/lang/String;)Ljava/lang/String;");
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state = 0;
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return;
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}
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else if (Names.textureUtil_uploadTexSub.equals(owner,name,desc)) {
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SMCLog.finest(" %s","uploadTexSubForLoadAtlas");
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mv.visitMethodInsn(INVOKESTATIC, "shadersmodcore/client/ShadersTex", "uploadTexSubForLoadAtlas", "([[IIIIIZZ)V");
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return;
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}
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mv.visitMethodInsn(opcode, owner, name, desc);
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}
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}
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private static class MVanimation extends MethodVisitor
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{
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public MVanimation(MethodVisitor mv) {
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super(Opcodes.ASM4, mv);
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}
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@Override
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public void visitCode() {
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mv.visitCode();
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mv.visitVarInsn(ALOAD, 0);
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mv.visitMethodInsn(INVOKEVIRTUAL, Names.textureMap_.clas, "getMultiTexID", "()Lshadersmodcore/client/MultiTexID;");
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mv.visitFieldInsn(PUTSTATIC, "shadersmodcore/client/ShadersTex", "updatingTex", "Lshadersmodcore/client/MultiTexID;");
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}
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@Override
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public void visitInsn(int opcode) {
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if (opcode==RETURN) {
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mv.visitInsn(ACONST_NULL);
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mv.visitFieldInsn(PUTSTATIC, "shadersmodcore/client/ShadersTex", "updatingTex", "Lshadersmodcore/client/MultiTexID;");
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}
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mv.visitInsn(opcode);
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}
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}
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}
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