move SDL_Surface_Deleter and SDL_Texture_Deleter

src/app/core/utils/sdl_deleter.h

@@ -7,10 +7,31 @@ namespace yaze {
 namespace app {
 namespace core {
 
+/**
+ * @brief Deleter for SDL_Window and SDL_Renderer.
+ */
 struct SDL_Deleter {
   void operator()(SDL_Window *p) const { SDL_DestroyWindow(p); }
   void operator()(SDL_Renderer *p) const { SDL_DestroyRenderer(p); }
-  void operator()(SDL_Texture *p) const { SDL_DestroyTexture(p); }
+};
+
+/**
+ * @brief Deleter for SDL_Texture.
+ */
+struct SDL_Texture_Deleter {
+  void operator()(SDL_Texture *p) const {
+    if (p) SDL_DestroyTexture(p);
+  }
+};
+
+/**
+ * @brief Deleter for SDL_Surface.
+ */
+struct SDL_Surface_Deleter {
+  void operator()(SDL_Surface *p) const {
+    // Check if the surface is not null
+    if (p) SDL_FreeSurface(p);
+  }
 };
 
 }  // namespace core

src/app/gfx/bitmap.cc

@@ -16,6 +16,9 @@ namespace yaze {
 namespace app {
 namespace gfx {
 
+using core::SDL_Surface_Deleter;
+using core::SDL_Texture_Deleter;
+
 namespace {
 void GrayscalePalette(SDL_Palette *palette) {
   for (int i = 0; i < 8; i++) {

src/app/gfx/bitmap.h

@@ -11,6 +11,7 @@
 #include "absl/status/statusor.h"
 #include "absl/strings/str_cat.h"
 #include "app/core/constants.h"
+#include "app/core/utils/sdl_deleter.h"
 #include "app/gfx/snes_palette.h"
 
 namespace yaze {
@@ -193,22 +194,6 @@ class Bitmap {
   auto set_active(bool active) { active_ = active; }
 
  private:
-  struct SDL_Texture_Deleter {
-    void operator()(SDL_Texture *p) const {
-      if (p != nullptr) {
-        SDL_DestroyTexture(p);
-      }
-    }
-  };
-
-  struct SDL_Surface_Deleter {
-    void operator()(SDL_Surface *p) const {
-      if (p != nullptr) {
-        SDL_FreeSurface(p);
-      }
-    }
-  };
-
   int width_ = 0;
   int height_ = 0;
   int depth_ = 0;