Add Room class for Dungeon editing

Loads basic properties from the dungeon room header by the room ID.

src/app/zelda3/dungeon/room.cc

@@ -0,0 +1,109 @@
+#include "room.h"
+
+#include "app/core/common.h"
+#include "app/gfx/bitmap.h"
+#include "app/gfx/snes_palette.h"
+#include "app/gfx/snes_tile.h"
+#include "app/rom.h"
+#include "gui/canvas.h"
+
+namespace yaze {
+namespace app {
+namespace zelda3 {
+namespace dungeon {
+
+void Room::LoadChests() {}
+
+void Room::LoadBlocks() {}
+
+void Room::LoadTorches() {}
+
+void Room::LoadSecrets() {}
+
+void Room::LoadObjectsFromArray(int loc) {}
+
+void Room::LoadSpritesFromArray(int loc) {}
+
+void Room::LoadRoomFromROM() {
+  // Load dungeon header
+  int headerPointer = core::SnesToPc(room_header_pointer);
+
+  MessageID = messages_id_dungeon + (RoomID * 2);
+
+  int hpos = core::SnesToPc((rom_[room_header_pointers_bank] << 16) |
+                            headerPointer + (RoomID * 2));
+  hpos++;
+  uchar b = rom_[hpos];
+
+  Layer2Mode = (uchar)(b >> 5);
+  // TODO(@scawful): Make LayerMerging object.
+  // LayerMerging = LayerMergeType.ListOf[(b & 0x0C) >> 2];
+
+  IsDark = (b & 0x01) == 0x01;
+  hpos++;
+
+  Palette = rom_[hpos];
+  hpos++;
+
+  BackgroundTileset = rom_[hpos];
+  hpos++;
+
+  SpriteTileset = rom_[hpos];
+  hpos++;
+
+  Layer2Behavior = rom_[hpos];
+  hpos++;
+
+  Tag1 = rom_[hpos];
+  hpos++;
+
+  Tag2 = rom_[hpos];
+  hpos++;
+
+  b = rom_[hpos];
+
+  Pits.TargetLayer = (uchar)(b & 0x03);
+  Stair1.TargetLayer = (uchar)((b >> 2) & 0x03);
+  Stair2.TargetLayer = (uchar)((b >> 4) & 0x03);
+  Stair3.TargetLayer = (uchar)((b >> 6) & 0x03);
+  hpos++;
+  Stair4.TargetLayer = (uchar)(rom_[hpos] & 0x03);
+  hpos++;
+
+  Pits.Target = rom_[hpos];
+  hpos++;
+  Stair1.Target = rom_[hpos];
+  hpos++;
+  Stair2.Target = rom_[hpos];
+  hpos++;
+  Stair3.Target = rom_[hpos];
+  hpos++;
+  Stair4.Target = rom_[hpos];
+  hpos++;
+
+  // Load room objects
+  int objectPointer = core::SnesToPc(room_object_pointer);
+  int room_address = objectPointer + (RoomID * 3);
+
+  int objects_location = core::SnesToPc(room_address);
+
+  LoadObjectsFromArray(objects_location);
+
+  // Load sprites
+  int spr_ptr = 0x040000 | rooms_sprite_pointer;
+  int sprite_address =
+      core::SnesToPc(dungeon_spr_ptrs | spr_ptr + (RoomID * 2));
+  LoadSpritesFromArray(sprite_address);
+
+  // Load other stuff
+  LoadChests();
+  LoadBlocks();
+  LoadTorches();
+  LoadSecrets();
+  Resync();
+}
+
+}  // namespace dungeon
+}  // namespace zelda3
+}  // namespace app
+}  // namespace yaze