2 files changed, 373 insertions, 0 deletions

@@ -0,0 +1,15 @@
+cmake_minimum_required (VERSION 3.1)
+project (sprite_dumper)
+
+set(CMAKE_BUILD_TYPE Debug)
+
+find_package(PkgConfig)
+pkg_check_modules(GraphicsMagick GraphicsMagick++ REQUIRED)
+
+include_directories(${GraphicsMagick_INCLUDE_DIRS})
+
+add_executable(sprite_dumper main.cpp)
+
+set_property(TARGET sprite_dumper PROPERTY CXX_STANDARD 17)
+set_property(TARGET sprite_dumper PROPERTY CXX_STANDARD_REQUIRED ON)
+target_link_libraries(sprite_dumper ${GraphicsMagick_LIBRARIES})
@@ -0,0 +1,358 @@
+// Inspired a lot by https://github.com/jeffman/MOTHER-3-Funland
+
+#include <fstream>
+#include <string_view>
+#include <stdexcept>
+#include <string>
+#include <vector>
+#include <iostream>
+#include <Magick++.h>
+
+class Rom {
+public:
+
+  explicit Rom(std::string_view filename) {
+    std::ifstream romfile(filename.data(), std::ios::binary);
+    if (!romfile.is_open()) {
+      throw std::invalid_argument("Could not find ROM file: " + std::string(filename));
+    }
+
+    romfile.seekg(0, romfile.end);
+    int length = romfile.tellg();
+    romfile.seekg(0, romfile.beg);
+
+    if (length != 0x2000000) {
+      throw std::invalid_argument("Incorrect ROM length");
+    }
+
+    data_ = std::vector<char>(length, 0);
+    romfile.read(data_.data(), length);
+
+    const char header[] = {'M','O','T','H','E','R','3',0,0,0,0,0,'A','3','U','J'};
+    std::string headerTest;
+    for (int i = 0xA0; i < 0xB0; i++) {
+      if (data_.at(i) != header[i-0xA0]) {
+        std::cout << i << std::endl;
+
+        throw std::invalid_argument("Invalid ROM header");
+      }
+    }
+  }
+
+  const std::vector<char>& data() const { return data_; }
+
+  int ReadNextByte() {
+    int o2r = offset_;
+    offset_++;
+    return ReadByte(o2r);
+  }
+
+  int ReadByte(int addr) const {
+    return static_cast<unsigned char>(data_[addr]);
+  }
+
+  int ReadNextTwoBytes() {
+    int o2r = offset_;
+    offset_+=2;
+    return ReadTwoBytes(o2r);
+  }
+
+  int ReadTwoBytes(int addr) const {
+    return static_cast<unsigned char>(data_[addr]) | (data_[addr + 1] << 8);
+  }
+
+  int ReadNextFourBytes() {
+    int o2r = offset_;
+    offset_+=4;
+    return ReadFourBytes(o2r);
+  }
+
+  int ReadFourBytes(int addr) const {
+    return static_cast<unsigned char>(data_[addr]) | (data_[addr + 1] << 8) | (data_[addr + 2] << 16) | (data_[addr + 3] << 24);
+  }
+
+  void Seek(int offset) {
+    offset_ = offset;
+  }
+
+  void SeekAdd(int delta) {
+    offset_ += delta;
+  }
+
+private:
+
+  std::vector<char> data_;
+  int offset_ = 0;
+};
+
+class Palette {
+public:
+
+  Palette() = default;
+
+  Palette(Rom& m3, const int addr) {
+    for (int i=0; i<16; i++) {
+      unsigned short ch = m3.ReadTwoBytes(addr + (i << 1));
+      int r = (ch & 0x1F);
+      int g = ((ch >> 5) & 0x1F);
+      int b = ((ch >> 10) & 0x1F);
+      colors_.push_back(Magick::ColorRGB((r << 3)/256.0, (g << 3)/256.0, (b << 3)/256.0));
+    }
+  }
+
+  const std::vector<Magick::Color>& Colors() const { return colors_; }
+
+private:
+  std::vector<Magick::Color> colors_;
+};
+
+class PaletteSet {
+public:
+  PaletteSet(Rom& m3) : m3_(m3) {
+    for (int i=0; i<16; i++) {
+      defaultPals_.emplace_back(m3, GetPointer(0) + (i << 5));
+    }
+  }
+
+  const Palette& GetPalette(int spriteindex, int palnum = -1) {
+    int a = GetPointer(spriteindex);
+
+    if ((spriteindex > 0xFF) && (spriteindex < 0x26C)) {
+      specialPals_[spriteindex] = Palette(m3_, a);
+      return specialPals_[spriteindex];
+    } else {
+      if (palnum == -1) {
+        palnum = static_cast<unsigned char>(m3_.ReadByte(0x1433D7C + 1 + ((spriteindex + 1) * 12))) & 0xF;
+      }
+
+      return defaultPals_.at(palnum);
+    }
+  }
+
+private:
+
+  int GetPointer(int spriteindex) {
+    const int ADDR = 0x1A41548;
+
+    int index = 0;
+
+    if ((spriteindex > 0xFF) && (spriteindex < 0x26C)) {
+      // These sprites use the (spriteindex - 0xFF)th entry
+      index = spriteindex - 0xff;
+    }
+
+    int a = m3_.ReadFourBytes(ADDR + 4 + (index << 2));
+    if (a == -1) return -1;
+    return ADDR + a;
+  }
+
+  Rom& m3_;
+  std::vector<Palette> defaultPals_;
+  std::map<int, Palette> specialPals_;
+};
+
+struct Subsprite {
+  int x;
+  int y;
+  int tile;
+  bool flipH;
+  bool flipV;
+  int objSize;
+  int objShape;
+
+  int Width() const { return WIDTHS[objShape][objSize]; }
+
+  int Height() const { return HEIGHTS[objShape][objSize]; }
+
+private:
+
+  static constexpr int WIDTHS[3][4] = { { 8, 16, 32, 64 }, { 16, 32, 32, 64 }, { 8, 8, 16, 32 } };
+  static constexpr int HEIGHTS[3][4] = { { 8, 16, 32, 64 }, { 8, 8, 16, 32 }, { 16, 32, 32, 64 } };
+};
+
+struct Sprite {
+  std::vector<Subsprite> subsprites;
+
+  Magick::Image render(Rom& m3, const Palette& palette, const int gfxPtr) const {
+    Magick::Image result;
+
+    if (subsprites.empty()) return result;
+
+    int minX = subsprites[0].x;
+    int minY = subsprites[0].y;
+    int maxX = minX + subsprites[0].Width();
+    int maxY = minY + subsprites[0].Height();
+
+    for (int j=1; j<subsprites.size(); j++) {
+      const Subsprite& o = subsprites[j];
+
+      if (o.x < minX) minX = o.x;
+      if (o.y < minY) minY = o.y;
+      if ((o.x + o.Width()) > maxX) maxX = o.x + o.Width();
+      if ((o.y + o.Height()) > maxY) maxY = o.y + o.Height();
+    }
+
+    int width = maxX - minX;
+    int height = maxY - minY;
+    int centerX = -minX;
+    int centerY = -minY;
+
+    result = Magick::Image(Magick::Geometry(width, height), "transparent");
+    result.modifyImage();
+
+    Magick::Pixels view(result);
+
+    for (const Subsprite& o : subsprites) {
+      int tilePointer = o.tile << 5;
+      for (int y=0; y<o.Height(); y += 8) {
+        int actualY = o.flipV ? (o.Height() - y - 8) : y;
+
+        for (int x=0; x<o.Width(); x += 8) {
+          int tileData[8][8];
+
+          int tileSrcOffset = gfxPtr + tilePointer;
+          for (int ty=0; ty<8; ty++) {
+            for (int tx=0; tx<4; tx++) {
+              unsigned char ch = m3.ReadByte(tileSrcOffset++);
+              tileData[tx*2][ty] = static_cast<unsigned char>(ch & 0xF);
+              tileData[tx*2+1][ty] = static_cast<unsigned char>((ch >> 4) & 0xF);
+            }
+          }
+
+          tilePointer += 0x20;
+
+          int actualX = o.flipH ? (o.Width() - x - 8) : x;
+
+          int destX = o.x + centerX + actualX;
+          int destY = o.y + centerY + actualY;
+
+          Magick::PixelPacket* pixels = view.get(destX,destY,8,8);
+
+          for (int ty=0; ty<8; ty++) {
+            int actualTy = o.flipV ? (7-ty) : ty;
+
+            for (int tx=0; tx<8; tx++) {
+              int actualTx = o.flipH ? (7-tx) : tx;
+
+              if (tileData[actualTx][actualTy] != 0) {
+                auto& c = palette.Colors().at(tileData[actualTx][actualTy]);
+                std::cout << c.redQuantum() << "," << c.greenQuantum() << "," << c.blueQuantum() << std::endl;
+                *pixels = palette.Colors().at(tileData[actualTx][actualTy]);
+                std::cout << tileData[actualTx][actualTy] << std::endl;
+              }
+              pixels++;
+            }
+          }
+
+          view.sync();
+        }
+      }
+    }
+
+    return result;
+  }
+};
+
+struct SpriteSheet {
+  int gfxPtr;
+  std::vector<Sprite> sprites;
+
+  Magick::Image render(Rom& m3, PaletteSet& palettes) const {
+
+
+    for (int i=0; i<sprites.size(); i++) {
+      const Palette& palette = palettes.GetPalette(i);
+      return sprites[0].render(m3, palette, gfxPtr);
+
+    }
+  }
+};
+
+class Bank {
+public:
+
+  Bank(Rom& m3, const int baseAddr, const int gfxAddr) : baseAddr_(baseAddr), gfxAddr_(gfxAddr) {
+    int numEntries = m3.ReadFourBytes(baseAddr);
+    std::cout << numEntries << std::endl;
+
+    for (int i = 0; i < numEntries; i++) {
+      int sheetAddr = GetPointerToSheet(m3, i);
+      if (sheetAddr == -1) continue;
+
+      SpriteSheet ss;
+      ss.gfxPtr = GetGfxPointer(m3, i);
+
+      m3.Seek(sheetAddr);
+      m3.SeekAdd(8);
+
+      unsigned short spriteCount = m3.ReadNextTwoBytes();
+      for (int j=0; j<spriteCount; j++) {
+        Sprite sprite;
+
+        unsigned short subspriteCount = m3.ReadNextTwoBytes();
+        for (int k=0; k<subspriteCount; k++) {
+          Subsprite subsprite;
+          subsprite.y = static_cast<char>(m3.ReadNextByte());
+          subsprite.x = static_cast<char>(m3.ReadNextByte());
+
+          unsigned short ch = m3.ReadNextTwoBytes();
+          subsprite.tile = static_cast<unsigned short>(ch & 0x3FF);
+          subsprite.flipH = (ch & 0x400) != 0;
+          subsprite.flipV = (ch & 0x800) != 0;
+          subsprite.objSize = static_cast<unsigned char>((ch >> 12) & 3);
+          subsprite.objShape = static_cast<unsigned char>((ch >> 14) & 3);
+
+          std::cout << subsprite.y << std::endl;
+          std::cout << subsprite.x << std::endl;
+          std::cout << subsprite.flipH << "," << subsprite.flipV << std::endl;
+
+          sprite.subsprites.push_back(std::move(subsprite));
+        }
+
+        m3.SeekAdd(2);
+
+        ss.sprites.push_back(std::move(sprite));
+      }
+
+      spritesheets_.push_back(std::move(ss));
+      if (i == 1) return;
+    }
+  }
+
+  const std::vector<SpriteSheet>& SpriteSheets() const { return spritesheets_; }
+
+private:
+
+  int GetPointerToSheet(Rom& m3, int index) {
+    int a = m3.ReadFourBytes(baseAddr_ + 4 + (index << 2));
+    if (a == 0) return -1;
+    return a + baseAddr_;
+  }
+
+  int GetGfxPointer(Rom& m3, int index) {
+    return m3.ReadFourBytes(gfxAddr_ + 4 + (index << 2)) + gfxAddr_;
+  }
+
+  int baseAddr_;
+  int gfxAddr_;
+  std::vector<SpriteSheet> spritesheets_;
+};
+
+int main(int argc, char** argv) {
+  if (argc != 2) {
+    std::cout << "Usage" << std::endl;
+    return -1;
+  }
+
+  Magick::InitializeMagick(nullptr);
+
+  Rom m3(argv[1]);
+  PaletteSet palettes(m3);
+  //const int banks[] = {0x1A442A4, 0x1AE0638, 0x1AEE4C4, 0x1AF1ED0};
+  Bank b1(m3, 0x1A442A4, 0x14383E4);
+  Magick::Image im = b1.SpriteSheets()[1].render(m3, palettes);
+  im.magick("png");
+  im.write("out.png");
+
+  return 0;
+}
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