refactor Tile16Editor: improve LoadTile8 method with asynchronous tile data loading

src/app/editor/graphics/tile16_editor.cc

@@ -1,19 +1,13 @@
 #include "tile16_editor.h"
 
-#include <cmath>
+#include <future>
 
 #include "absl/status/status.h"
-#include "absl/status/statusor.h"
 #include "app/core/platform/file_dialog.h"
 #include "app/core/platform/renderer.h"
-#include "app/editor/editor.h"
-#include "app/editor/graphics/palette_editor.h"
 #include "app/gfx/bitmap.h"
 #include "app/gfx/snes_palette.h"
-#include "app/gfx/snes_tile.h"
-#include "app/gfx/tilesheet.h"
 #include "app/gui/canvas.h"
-#include "app/gui/icons.h"
 #include "app/gui/input.h"
 #include "app/gui/style.h"
 #include "app/rom.h"
@@ -33,7 +27,6 @@ using ImGui::BeginTabItem;
 using ImGui::BeginTable;
 using ImGui::Button;
 using ImGui::Checkbox;
-using ImGui::Combo;
 using ImGui::EndChild;
 using ImGui::EndMenu;
 using ImGui::EndMenuBar;
@@ -280,16 +273,18 @@ absl::Status Tile16Editor::DrawTileEditControls() {
 
 absl::Status Tile16Editor::LoadTile8() {
   auto ow_main_pal_group = rom()->palette_group().overworld_main;
-
   current_gfx_individual_.reserve(1024);
 
-  for (int index = 0; index < 1024; index++) {
-    std::vector<uint8_t> tile_data(0x40, 0x00);
+  std::vector<std::future<std::array<uint8_t, 0x40>>> futures;
 
+  for (int index = 0; index < 1024; index++) {
+    auto task_function = [&]() {
+      std::array<uint8_t, 0x40> tile_data;
       // Copy the pixel data for the current tile into the vector
       for (int ty = 0; ty < 8; ty++) {
         for (int tx = 0; tx < 8; tx++) {
-        // Current Gfx Data is 16 sheets of 8x8 tiles ordered 16 wide by 4 tall
+          // Current Gfx Data is 16 sheets of 8x8 tiles ordered 16 wide by 4
+          // tall
 
           // Calculate the position in the tile data vector
           int position = tx + (ty * 0x08);
@@ -310,12 +305,20 @@ absl::Status Tile16Editor::LoadTile8() {
           tile_data[position] = value;
         }
       }
+      return tile_data;
+    };
+    futures.emplace_back(std::async(std::launch::async, task_function));
+  }
 
+  for (auto &future : futures) {
+    future.wait();
+    auto tile_data = future.get();
     current_gfx_individual_.emplace_back();
-    current_gfx_individual_[index].Create(0x08, 0x08, 0x08, tile_data);
-    RETURN_IF_ERROR(current_gfx_individual_[index].ApplyPaletteWithTransparent(
+    auto &tile_bitmap = current_gfx_individual_.back();
+    tile_bitmap.Create(0x08, 0x08, 0x08, tile_data);
+    RETURN_IF_ERROR(tile_bitmap.ApplyPaletteWithTransparent(
         ow_main_pal_group[0], current_palette_));
-    Renderer::GetInstance().RenderBitmap(&current_gfx_individual_[index]);
+    Renderer::GetInstance().RenderBitmap(&tile_bitmap);
   }
 
   map_blockset_loaded_ = true;

src/app/editor/graphics/tile16_editor.h

@@ -48,7 +48,11 @@ class Tile16Editor : public gfx::GfxContext, public SharedRom {
   bool map_blockset_loaded_ = false;
   bool transfer_started_ = false;
   bool transfer_blockset_loaded_ = false;
+  bool x_flip = false;
+  bool y_flip = false;
+  bool priority_tile = false;
 
+  int tile_size;
   int current_tile16_ = 0;
   int current_tile8_ = 0;
   uint8_t current_palette_ = 0;
@@ -56,12 +60,6 @@ class Tile16Editor : public gfx::GfxContext, public SharedRom {
   core::NotifyValue<uint32_t> notify_tile16;
   core::NotifyValue<uint8_t> notify_palette;
 
-  // Various options for the Tile16 Editor
-  bool x_flip;
-  bool y_flip;
-  bool priority_tile;
-  int tile_size;
-
   std::array<uint8_t, 0x200> all_tiles_types_;
 
   // Tile16 blockset for selecting the tile to edit
@@ -100,4 +98,5 @@ class Tile16Editor : public gfx::GfxContext, public SharedRom {
 
 }  // namespace editor
 }  // namespace yaze
+
 #endif  // YAZE_APP_EDITOR_TILE16EDITOR_H