refactor Bitmap class: rename ConvertSurfaceToPNG to ConvertSurfaceToPng and streamline GetPngData method

src/app/gfx/bitmap.cc

@@ -51,7 +51,7 @@ void PngReadCallback(png_structp png_ptr, png_bytep outBytes,
 
 }  // namespace png_internal
 
-bool ConvertSurfaceToPNG(SDL_Surface *surface, std::vector<uint8_t> &buffer) {
+bool ConvertSurfaceToPng(SDL_Surface *surface, std::vector<uint8_t> &buffer) {
   png_structp png_ptr = png_create_write_struct("1.6.40", NULL, NULL, NULL);
   if (!png_ptr) {
     SDL_Log("Failed to create PNG write struct");
@@ -187,22 +187,14 @@ void ConvertPngToSurface(const std::vector<uint8_t> &png_data,
 }
 
 std::vector<uint8_t> Bitmap::GetPngData() {
-  ConvertSurfaceToPNG(surface_.get(), png_data_);
+  std::vector<uint8_t> png_data;
-  return png_data_;
+  ConvertSurfaceToPng(surface_.get(), png_data);
+  return png_data;
 }
 
 #endif  // YAZE_LIB_PNG
 
 namespace {
-
-void GrayscalePalette(SDL_Palette *palette) {
-  for (int i = 0; i < 8; i++) {
-    palette->colors[i].r = i * 31;
-    palette->colors[i].g = i * 31;
-    palette->colors[i].b = i * 31;
-  }
-}
-
 Uint32 GetSnesPixelFormat(int format) {
   switch (format) {
     case 0:
@@ -226,6 +218,11 @@ Bitmap::Bitmap(int width, int height, int depth, int data_size) {
   Create(width, height, depth, std::vector<uint8_t>(data_size, 0));
 }
 
+void Bitmap::Create(int width, int height, int depth, std::span<uint8_t> data) {
+  data_ = std::vector<uint8_t>(data.begin(), data.end());
+  Create(width, height, depth, data_);
+}
+
 void Bitmap::Create(int width, int height, int depth,
                     const std::vector<uint8_t> &data) {
   Create(width, height, depth, kIndexed, data);
@@ -482,5 +479,4 @@ void Bitmap::WriteColor(int position, const ImVec4 &color) {
 }
 
 }  // namespace gfx
-
 }  // namespace yaze

src/app/gfx/bitmap.h

@@ -94,6 +94,7 @@ class Bitmap {
   /**
    * @brief Creates a bitmap object with the provided graphical data.
    */
+  void Create(int width, int height, int depth, std::span<uint8_t> data);
   void Create(int width, int height, int depth,
               const std::vector<uint8_t> &data);
   void Create(int width, int height, int depth, int format,
@@ -138,15 +139,6 @@ class Bitmap {
     modified_ = true;
   }
 
-  void WriteWordToPixel(int position, uint16_t value) {
-    if (pixel_data_ == nullptr) {
-      pixel_data_ = data_.data();
-    }
-    pixel_data_[position] = value & 0xFF;
-    pixel_data_[position + 1] = (value >> 8) & 0xFF;
-    modified_ = true;
-  }
-
   void WriteColor(int position, const ImVec4 &color);
 
   void Cleanup() {
@@ -174,7 +166,6 @@ class Bitmap {
   auto size() const { return data_size_; }
   auto data() const { return data_.data(); }
   auto &mutable_data() { return data_; }
-  auto mutable_pixel_data() { return pixel_data_; }
   auto surface() const { return surface_.get(); }
   auto mutable_surface() { return surface_.get(); }
   auto converted_surface() const { return converted_surface_.get(); }
@@ -202,8 +193,6 @@ class Bitmap {
   uint8_t *pixel_data_ = nullptr;
   std::vector<uint8_t> data_;
 
-  std::vector<uint8_t> png_data_;
-
   gfx::SnesPalette palette_;
   std::shared_ptr<SDL_Texture> texture_ = nullptr;
   std::shared_ptr<SDL_Surface> surface_ = nullptr;
@@ -213,7 +202,6 @@ class Bitmap {
 using BitmapTable = std::unordered_map<int, gfx::Bitmap>;
 
 }  // namespace gfx
-
 }  // namespace yaze
 
 #endif  // YAZE_APP_GFX_BITMAP_H