Add RenderRoomGraphics method to Room class for improved graphics rendering

Implement RenderRoomGraphics in the Room class to handle the rendering of room graphics, including floor and background drawing. This addition enhances the graphics management by utilizing the gfx::Arena for rendering operations and updating bitmaps as needed. Update room.h to declare the new method.

src/app/zelda3/dungeon/room.cc

@@ -6,6 +6,8 @@
 #include <vector>
 
 #include "absl/strings/str_cat.h"
+#include "app/core/platform/renderer.h"
+#include "app/gfx/arena.h"
 #include "app/rom.h"
 #include "app/zelda3/dungeon/room_object.h"
 #include "app/zelda3/sprite/sprite.h"
@@ -188,13 +190,11 @@ Room LoadRoomFromRom(Rom *rom, int room_id) {
 }
 
 void Room::LoadRoomGraphics(uint8_t entrance_blockset) {
-  const auto &main_gfx = rom()->main_blockset_ids;
   const auto &room_gfx = rom()->room_blockset_ids;
   const auto &sprite_gfx = rom()->spriteset_ids;
-  current_gfx16_.reserve(0x4000);
 
   for (int i = 0; i < 8; i++) {
-    blocks_[i] = main_gfx[blockset][i];
+    blocks_[i] = rom()->main_blockset_ids[blockset][i];
     if (i >= 6 && i <= 6) {
       // 3-6
       if (entrance_blockset != 0xFF &&
@@ -246,6 +246,36 @@ void Room::CopyRoomGraphicsToBuffer() {
   LoadAnimatedGraphics();
 }
 
+void Room::RenderRoomGraphics() {
+  CopyRoomGraphicsToBuffer();
+
+  gfx::Arena::Get().bg1().DrawFloor(rom()->vector(), tile_address,
+                                    tile_address_floor, floor1_graphics_);
+  gfx::Arena::Get().bg2().DrawFloor(rom()->vector(), tile_address,
+                                    tile_address_floor, floor2_graphics_);
+
+  gfx::Arena::Get().bg1().DrawBackground(std::span<uint8_t>(current_gfx16_));
+  gfx::Arena::Get().bg2().DrawBackground(std::span<uint8_t>(current_gfx16_));
+
+  auto bg1_palette =
+      rom()->mutable_palette_group()->get_group("dungeon_main")[0].palette(0);
+
+  if (!gfx::Arena::Get().bg1().bitmap().is_active()) {
+    core::Renderer::GetInstance().CreateAndRenderBitmap(
+        0x200, 0x200, 0x200, gfx::Arena::Get().bg1().bitmap().vector(),
+        gfx::Arena::Get().bg1().bitmap(), bg1_palette);
+    core::Renderer::GetInstance().CreateAndRenderBitmap(
+        0x200, 0x200, 0x200, gfx::Arena::Get().bg2().bitmap().vector(),
+        gfx::Arena::Get().bg2().bitmap(), bg1_palette);
+  } else {
+    // Update the bitmap
+    core::Renderer::GetInstance().UpdateBitmap(
+        &gfx::Arena::Get().bg1().bitmap());
+    core::Renderer::GetInstance().UpdateBitmap(
+        &gfx::Arena::Get().bg2().bitmap());
+  }
+}
+
 void Room::LoadAnimatedGraphics() {
   int gfx_ptr = SnesToPc(rom()->version_constants().kGfxAnimatedPointer);
 

src/app/zelda3/dungeon/room.h

@@ -204,6 +204,7 @@ class Room {
 
   void LoadRoomGraphics(uint8_t entrance_blockset = 0xFF);
   void CopyRoomGraphicsToBuffer();
+  void RenderRoomGraphics();
   void LoadAnimatedGraphics();
   void LoadObjects();
   void LoadSprites();