58 update logo for megaman legends 2 in demo loading screen

index.ts

@@ -22,6 +22,7 @@ import {
   replaceHunterSeeker,
   replaceDrillArm,
 } from "./src/EncodeWeapon";
+import { updateDemoLogo } from "./src/GAME";
 
 encodeTitle("miku/title.png");
 // process.exit();
@@ -212,6 +213,7 @@ replaceDrillArm("miku/weapons/PL00R10_001.obj");
 encodeApronMegaman();
 updateST03T("miku/apron/body-01.png", "miku/faces/ST03T.png");
 updateSceneModel();
+updateDemoLogo("miku/title-smol.png");
 
 /**
  Encode Rom

src/EncodeRom.ts

@@ -572,6 +572,7 @@ const encodeRom = () => {
     "cut-ST1802T.BIN",
     "cut-ST1803.BIN",
     "cut-ST2501.BIN",
+    "GAME.BIN",
   ];
 
   console.log("--- Replacing Cut Scene Textures ---");

src/EncodeTitle.ts

@@ -30,6 +30,116 @@ type Command = {
   word: number;
 };
 
+const updateSmallLogo = (src: Buffer) => {
+  const tim = {
+    type: src.readUInt32LE(0x00),
+    fullSize: src.readUInt32LE(0x04),
+    paletteX: src.readUInt16LE(0x0c),
+    paletteY: src.readUInt16LE(0x0e),
+    colorCount: src.readUInt16LE(0x10),
+    paletteCount: src.readUInt16LE(0x12),
+    imageX: src.readUInt16LE(0x14),
+    imageY: src.readUInt16LE(0x16),
+    width: src.readUInt16LE(0x18),
+    height: src.readUInt16LE(0x1a),
+    bitfieldSize: src.readUInt16LE(0x24),
+    payloadSize: src.readUInt16LE(0x26),
+  };
+
+  tim.width *= 4;
+
+  const { fullSize, bitfieldSize } = tim;
+  const bitfield: number[] = new Array();
+  const target = Buffer.alloc(fullSize);
+
+  // Read Bitfield
+  const bitfieldBuffer = src.subarray(0x30, 0x30 + bitfieldSize);
+  let ofs = 0x30;
+  for (let i = 0; i < bitfieldSize; i += 4) {
+    const dword = src.readUInt32LE(ofs + i);
+    for (let k = 31; k > -1; k--) {
+      bitfield.push(dword & (1 << k) ? 1 : 0);
+    }
+  }
+
+  ofs += bitfieldSize;
+  const payloadStart = 0;
+
+  // Decompress
+
+  let outOfs = 0;
+  let windowOfs = 0;
+  let cmdCount = 0;
+  let bytes = 0;
+
+  for (let i = 0; i < bitfield.length; i++) {
+    const bit = bitfield[i];
+    if (outOfs === fullSize) {
+      const payload = src.subarray(0x30 + bitfieldSize, ofs);
+      break;
+    }
+
+    const word = src.readUInt16LE(ofs);
+    ofs += 2;
+
+    switch (bit) {
+      case 0:
+        target.writeUInt16LE(word, outOfs);
+        outOfs += 2;
+        break;
+      case 1:
+        if (word === 0xffff) {
+          windowOfs += 0x2000;
+          cmdCount = 0;
+          bytes = 0;
+        } else {
+          cmdCount++;
+          const copyFrom = windowOfs + ((word >> 3) & 0x1fff);
+          const copyLen = ((word & 0x07) + 2) * 2;
+          bytes += copyLen;
+          for (let i = 0; i < copyLen; i++) {
+            target[outOfs++] = target[copyFrom + i];
+          }
+        }
+        break;
+    }
+  }
+
+  // Read the image data
+  const imageData: number[] = new Array();
+  for (ofs = 0; ofs < target.length; ofs++) {
+    const byte = target.readUInt8(ofs);
+    imageData.push(byte & 0xf);
+    imageData.push(byte >> 4);
+  }
+
+  // Update title to debug palette
+  const { width, height } = tim;
+  let index = 0;
+  for (let y = 0; y < height; y++) {
+    for (var x = 0; x < width; x++) {
+      if (x >= 48 && x < 48 + 96) {
+        imageData[index] = Math.floor((x - 48) / 12);
+        if (y >= 64 + 20 && y < 64 + 40) {
+          imageData[index] += 8;
+        }
+      }
+    }
+  }
+
+  // Re-encode the image data into a buffer
+  ofs = 0;
+  for (let i = 0; i < imageData.length; i += 2) {
+    const a = imageData[i] & 0x0f;
+    const b = imageData[i + 1] & 0x0f;
+    const byte = a | (b << 4);
+    target.writeUInt8(byte, ofs);
+    ofs++;
+  }
+
+  return target;
+};
+
 const encodeBitfield = (bits: boolean[]): Buffer => {
   const length = Math.ceil(bits.length / 32) * 4;
   let ofs = 0;

src/GAME.ts

@@ -0,0 +1,183 @@
+/**
+
+  Miku-Legends-2
+  Copyright (C) 2024, DashGL Project
+  By Kion ([email protected])
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+**/
+
+import { readFileSync, writeFileSync } from "fs";
+import { encodeCutSceneTexture, compressNewTexture } from "./EncodeTexture";
+
+const decompress = (src: Buffer) => {
+  const tim = {
+    type: src.readUInt32LE(0x00),
+    fullSize: src.readUInt32LE(0x04),
+    paletteX: src.readUInt16LE(0x0c),
+    paletteY: src.readUInt16LE(0x0e),
+    colorCount: src.readUInt16LE(0x10),
+    paletteCount: src.readUInt16LE(0x12),
+    imageX: src.readUInt16LE(0x14),
+    imageY: src.readUInt16LE(0x16),
+    width: src.readUInt16LE(0x18),
+    height: src.readUInt16LE(0x1a),
+    bitfieldSize: src.readUInt16LE(0x24),
+    payloadSize: src.readUInt16LE(0x26),
+  };
+
+  switch (tim.colorCount) {
+    case 16:
+      tim.width *= 4;
+      break;
+    case 256:
+      tim.width *= 2;
+      break;
+    default:
+      tim.paletteCount *= tim.colorCount / 16;
+      tim.colorCount = 16;
+      tim.width *= 4;
+      break;
+  }
+
+  const { fullSize, bitfieldSize } = tim;
+  const bitfield: number[] = new Array();
+  const target = Buffer.alloc(fullSize);
+
+  // Read Bitfield
+
+  const bitfieldBuffer = src.subarray(0x30, 0x30 + bitfieldSize);
+  let ofs = 0x30;
+  for (let i = 0; i < bitfieldSize; i += 4) {
+    const dword = src.readUInt32LE(ofs + i);
+    for (let k = 31; k > -1; k--) {
+      bitfield.push(dword & (1 << k) ? 1 : 0);
+    }
+  }
+
+  ofs += bitfieldSize;
+  const payloadStart = 0;
+
+  // Decompress
+
+  let outOfs = 0;
+  let windowOfs = 0;
+  let cmdCount = 0;
+  let bytes = 0;
+
+  for (let i = 0; i < bitfield.length; i++) {
+    const bit = bitfield[i];
+    if (outOfs === fullSize) {
+      const payload = src.subarray(0x30 + bitfieldSize, ofs);
+      break;
+    }
+
+    const word = src.readUInt16LE(ofs);
+    ofs += 2;
+
+    switch (bit) {
+      case 0:
+        target.writeUInt16LE(word, outOfs);
+        outOfs += 2;
+        break;
+      case 1:
+        if (word === 0xffff) {
+          windowOfs += 0x2000;
+          cmdCount = 0;
+          bytes = 0;
+        } else {
+          cmdCount++;
+          const copyFrom = windowOfs + ((word >> 3) & 0x1fff);
+          const copyLen = ((word & 0x07) + 2) * 2;
+          bytes += copyLen;
+          for (let i = 0; i < copyLen; i++) {
+            target[outOfs++] = target[copyFrom + i];
+          }
+        }
+        break;
+    }
+  }
+
+  return target;
+};
+
+const updateDemoLogo = (pngPath: string) => {
+  const bin = readFileSync("bin/GAME.BIN");
+  const pngData = readFileSync(pngPath);
+
+  const imgOfs = 0x041800;
+  const pal: number[] = [];
+
+  const encodedLogo = encodeCutSceneTexture(pal, pngData);
+  const encodedTexture = decompress(Buffer.from(bin.subarray(imgOfs)));
+
+  // Update Palette
+  const palOfs = 0x44800;
+  for (let i = 0; i < pal.length; i++) {
+    bin.writeUInt16LE(pal[i], palOfs + 0x30 + i * 2);
+  }
+
+  console.log("Encoded Logo: 0x%s", encodedLogo.length.toString(16));
+  console.log("Encoded Texture: 0x%s", encodedTexture.length.toString(16));
+
+  let texOfs = 0x2000;
+  let logoOfs = 0;
+  for (let y = 0; y < 40; y++) {
+    texOfs += 24;
+    for (let x = 0; x < 48; x++) {
+      encodedTexture[texOfs++] = encodedLogo[logoOfs++];
+    }
+    texOfs += 56;
+  }
+
+  console.log("Logo Pos: 0x%s", logoOfs.toString(16));
+
+  const [bodyBitField, compressedBody] = compressNewTexture(
+    Buffer.alloc(0),
+    encodedTexture,
+    0,
+  );
+  const len = bodyBitField.length + compressedBody.length;
+  console.log("Segment 2: 0x%s", len.toString(16));
+
+  for (let i = 0x41830; i < 0x432f2; i++) {
+    bin[i] = 0;
+  }
+
+  let ofs = 0x41830;
+  for (let i = 0; i < bodyBitField.length; i++) {
+    bin[ofs++] = bodyBitField[i];
+  }
+
+  for (let i = 0; i < compressedBody.length; i++) {
+    bin[ofs++] = compressedBody[i];
+  }
+
+  if (ofs <= 0x43000) {
+    console.log("too short!!!");
+  } else if (len > 0x43800) {
+    console.log("too long");
+  } else {
+    console.log("yaya!!!");
+  }
+
+  console.log("End: 0x%s", ofs.toString(16));
+  bin.writeInt16LE(bodyBitField.length, 0x41824);
+
+  writeFileSync("out/GAME.BIN", bin);
+};
+
+export default updateDemoLogo;
+export { updateDemoLogo };