Add gfx::Tilesheet implementations to source file

src/app/gfx/tilesheet.cc

@@ -0,0 +1,114 @@
+#include "app/gfx/tilesheet.h"
+
+#include <memory>
+#include <vector>
+
+#include "app/gfx/bitmap.h"
+#include "app/gfx/snes_color.h"
+#include "app/gfx/snes_palette.h"
+#include "app/gfx/snes_tile.h"
+
+namespace yaze {
+namespace app {
+namespace gfx {
+
+absl::StatusOr<Tilesheet> CreateTilesheetFromGraphicsBuffer(
+    const uint8_t* graphics_buffer, int width, int height, TileType tile_type,
+    int sheet_id) {
+  Tilesheet tilesheet;
+
+  // Calculate the offset in the graphics buffer based on the sheet ID
+  int sheet_offset = sheet_id * width * height;
+
+  // Initialize the tilesheet with the specified width, height, and tile type
+  tilesheet.Init(width, height, tile_type);
+
+  // Iterate over the tiles in the sheet and copy them into the tilesheet
+  for (int row = 0; row < height; ++row) {
+    for (int col = 0; col < width; ++col) {
+      // Calculate the index of the current tile in the graphics buffer
+      int tile_index = sheet_offset + (row * width + col) * 64;
+
+      // Copy the tile data into the tilesheet
+      for (int y = 0; y < 8; ++y) {
+        for (int x = 0; x < 8; ++x) {
+          int srcIndex = tile_index + (y * 8 + x);
+          int destX = col * 8 + x;
+          int destY = row * 8 + y;
+          int destIndex = (destY * width * 8) + destX;
+          tilesheet.mutable_bitmap()->mutable_data()[destIndex] =
+              graphics_buffer[srcIndex];
+        }
+      }
+    }
+  }
+
+  return tilesheet;
+}
+
+void Tilesheet::Init(int width, int height, TileType tile_type) {
+  bitmap_ = std::make_shared<Bitmap>(width, height, 8, 0x20000);
+  internal_data_.resize(0x20000);
+  tile_type_ = tile_type;
+  if (tile_type_ == TileType::Tile8) {
+    tile_width_ = 8;
+    tile_height_ = 8;
+  } else {
+    tile_width_ = 16;
+    tile_height_ = 16;
+  }
+}
+
+void Tilesheet::ComposeTile16(const std::vector<uint8_t>& graphics_buffer,
+                              const TileInfo& top_left,
+                              const TileInfo& top_right,
+                              const TileInfo& bottom_left,
+                              const TileInfo& bottom_right) {
+  // Calculate the base position for this Tile16 in the full-size bitmap
+  int tiles_per_row = bitmap_->width() / tile_width_;
+  int tile16_row = num_tiles_ / tiles_per_row;
+  int tile16_column = num_tiles_ % tiles_per_row;
+  int baseX = tile16_column * tile_width_;
+  int baseY = tile16_row * tile_height_;
+
+  // Compose and place each part of the Tile16
+  ComposeAndPlaceTilePart(graphics_buffer, top_left, baseX, baseY);
+  ComposeAndPlaceTilePart(graphics_buffer, top_right, baseX + 8, baseY);
+  ComposeAndPlaceTilePart(graphics_buffer, bottom_left, baseX, baseY + 8);
+  ComposeAndPlaceTilePart(graphics_buffer, bottom_right, baseX + 8, baseY + 8);
+
+  tile_info_.push_back({top_left, top_right, bottom_left, bottom_right});
+
+  num_tiles_++;
+}
+
+void Tilesheet::ComposeAndPlaceTilePart(
+    const std::vector<uint8_t>& graphics_buffer, const TileInfo& tile_info,
+    int baseX, int baseY) {
+  std::vector<uint8_t> tile_data =
+      FetchTileDataFromGraphicsBuffer(graphics_buffer, tile_info.id_);
+
+  if (tile_info.vertical_mirror_) {
+    MirrorTileDataVertically(tile_data);
+  }
+  if (tile_info.horizontal_mirror_) {
+    MirrorTileDataHorizontally(tile_data);
+  }
+
+  // Place the tile data into the full-size bitmap at the calculated position
+  for (int y = 0; y < 8; ++y) {
+    for (int x = 0; x < 8; ++x) {
+      int srcIndex = y * 8 + x;
+      int destX = baseX + x;
+      int destY = baseY + y;
+      int destIndex = (destY * bitmap_->width()) + destX;
+      internal_data_[destIndex] = tile_data[srcIndex];
+    }
+  }
+
+  bitmap_->set_data(internal_data_);
+}
+
+}  // namespace gfx
+}  // namespace app
+}  // namespace yaze

src/app/gfx/tilesheet.h

@@ -1,10 +1,13 @@
 #ifndef YAZE_APP_GFX_TILESHEET_H
 #define YAZE_APP_GFX_TILESHEET_H
+
 #include <memory>
 #include <vector>
 
 #include "app/gfx/bitmap.h"
+#include "app/gfx/snes_color.h"
 #include "app/gfx/snes_palette.h"
+#include "app/gfx/snes_tile.h"
 
 namespace yaze {
 namespace app {
@@ -22,68 +25,14 @@ class Tilesheet {
         tile_height_(tileHeight),
         tile_type_(tile_type) {}
 
-  void Init(int width, int height, TileType tile_type) {
-    bitmap_ = std::make_shared<Bitmap>(width, height, 8, 0x20000);
-    internal_data_.resize(0x20000);
-    tile_type_ = tile_type;
-    if (tile_type_ == TileType::Tile8) {
-      tile_width_ = 8;
-      tile_height_ = 8;
-    } else {
-      tile_width_ = 16;
-      tile_height_ = 16;
-    }
-  }
+  void Init(int width, int height, TileType tile_type);
 
   void ComposeTile16(const std::vector<uint8_t>& graphics_buffer,
                      const TileInfo& top_left, const TileInfo& top_right,
-                     const TileInfo& bottom_left,
-                     const TileInfo& bottom_right) {
-    // Calculate the base position for this Tile16 in the full-size bitmap
-    int tiles_per_row = bitmap_->width() / tile_width_;
-    int tile16_row = num_tiles_ / tiles_per_row;
-    int tile16_column = num_tiles_ % tiles_per_row;
-    int baseX = tile16_column * tile_width_;
-    int baseY = tile16_row * tile_height_;
-
-    // Compose and place each part of the Tile16
-    ComposeAndPlaceTilePart(graphics_buffer, top_left, baseX, baseY);
-    ComposeAndPlaceTilePart(graphics_buffer, top_right, baseX + 8, baseY);
-    ComposeAndPlaceTilePart(graphics_buffer, bottom_left, baseX, baseY + 8);
-    ComposeAndPlaceTilePart(graphics_buffer, bottom_right, baseX + 8,
-                            baseY + 8);
-
-    tile_info_.push_back({top_left, top_right, bottom_left, bottom_right});
-
-    num_tiles_++;
-  }
+                     const TileInfo& bottom_left, const TileInfo& bottom_right);
 
   void ComposeAndPlaceTilePart(const std::vector<uint8_t>& graphics_buffer,
-                               const TileInfo& tile_info, int baseX,
-                               int baseY) {
-    std::vector<uint8_t> tile_data =
-        FetchTileDataFromGraphicsBuffer(graphics_buffer, tile_info.id_);
-
-    if (tile_info.vertical_mirror_) {
-      MirrorTileDataVertically(tile_data);
-    }
-    if (tile_info.horizontal_mirror_) {
-      MirrorTileDataHorizontally(tile_data);
-    }
-
-    // Place the tile data into the full-size bitmap at the calculated position
-    for (int y = 0; y < 8; ++y) {
-      for (int x = 0; x < 8; ++x) {
-        int srcIndex = y * 8 + x;
-        int destX = baseX + x;
-        int destY = baseY + y;
-        int destIndex = (destY * bitmap_->width()) + destX;
-        internal_data_[destIndex] = tile_data[srcIndex];
-      }
-    }
-
-    bitmap_->set_data(internal_data_);
-  }
+                               const TileInfo& tile_info, int baseX, int baseY);
 
   // Extracts a tile from the tilesheet
   Bitmap GetTile(int tileX, int tileY, int bmp_width, int bmp_height) {
@@ -230,6 +179,10 @@ class Tilesheet {
   TileType tile_type_;
 };
 
+absl::StatusOr<Tilesheet> CreateTilesheetFromGraphicsBuffer(
+    const uint8_t* graphics_buffer, int width, int height, TileType tile_type,
+    int sheet_id);
+
 }  // namespace gfx
 }  // namespace app
 }  // namespace yaze