resize support

src/utils.cpp

@@ -23,3 +23,46 @@ std::vector<SDL_Surface *> get_hills() {
 
     return surfaces;
 }
+
+SDL_Surface *resize_surface(SDL_Surface *t_surface, int t_width, int t_height) {
+    if (!t_surface)
+        throw std::runtime_error("Original surface is null.");
+
+    if (t_surface->w == t_width && t_surface->h == t_height)
+        return t_surface;
+
+    SDL_Surface *resizedSurface = SDL_CreateRGBSurface(
+            0,
+            t_width,
+            t_height,
+            t_surface->format->BitsPerPixel,
+            t_surface->format->Rmask,
+            t_surface->format->Gmask,
+            t_surface->format->Bmask,
+            t_surface->format->Amask
+    );
+
+    if (!resizedSurface)
+        throw std::runtime_error("Failed to create resized surface: " + std::string(SDL_GetError()));
+
+    SDL_Rect src_rect, dest_rect;
+    for (int y = 0; y < t_height; ++y) {
+        for (int x = 0; x < t_width; ++x) {
+            src_rect.x = x * t_surface->w / t_width;
+            src_rect.y = y * t_surface->h / t_height;
+            src_rect.w = 1;
+            src_rect.h = 1;
+
+            dest_rect.x = x;
+            dest_rect.y = y;
+            dest_rect.w = 1;
+            dest_rect.h = 1;
+
+            SDL_BlitSurface(t_surface, &src_rect, resizedSurface, &dest_rect);
+        }
+    }
+
+    return resizedSurface;
+}
+
+

src/utils.hpp

@@ -11,4 +11,6 @@ constexpr size_t array_len(T *array[]) {
     return i;
 }
 
-std::vector<SDL_Surface*> get_hills();
+std::vector<SDL_Surface *> get_hills();
+
+SDL_Surface *resize_surface(SDL_Surface *t_surface, int t_width, int t_height);