fake alias implementation

overlay/default.nix

@@ -0,0 +1,32 @@
+# simple.nix
+let
+  pkgs = import <nixpkgs> { };
+in
+  pkgs.stdenv.mkDerivation {
+    name = "catz-attack";
+
+    src = ./src/.;
+
+    buildInputs = [ 
+      pkgs.pkg-config
+      pkgs.sdl3
+      pkgs.sdl3-image
+      pkgs.xorg.libX11
+      pkgs.xorg.libXext
+      pkgs.xorg.libXrender
+      pkgs.xorg.libXcomposite
+      pkgs.xorg.libXcursor
+      pkgs.libxfixes
+    ];
+
+    buildPhase = ''
+      echo $CC main.c neko.c -I ./ -o catz-attack $(pkg-config --cflags --libs sdl3 x11 xfixes sdl3-image) -lm
+      $CC main.c neko.c -I ./ -o catz-attack $(pkg-config --cflags --libs sdl3 x11 xfixes sdl3-image) -lm
+    '';
+
+    installPhase = ''
+      mkdir -p $out/bin
+      cp real_oneko.gif sample.gif $out/bin/
+      cp catz-attack  $out/bin/catz-attack
+    '';
+  }

overlay/result

@@ -0,0 +1 @@
+/nix/store/115rxak3fbaqs4xfglndd333z44bx6lk-catz-attack

overlay/src/main.c

@@ -68,6 +68,7 @@ SDL_AppResult SDL_AppInit(void **appstate, int argc, char *argv[])
     char *gif_path = NULL;
 
     SDL_SetAppMetadata("systemd", "1.0", "org.kernel.systemd");
+    SDL_SetHint("SDL_VIDEO_X11_VISUALID", "argb");
 
     if (!SDL_Init(SDL_INIT_VIDEO)) {
         SDL_Log("Couldn't initialize SDL: %s", SDL_GetError());
@@ -95,9 +96,10 @@ SDL_AppResult SDL_AppInit(void **appstate, int argc, char *argv[])
         return SDL_APP_FAILURE;
     }
 
+    SDL_SetRenderDrawBlendMode(renderer, SDL_BLENDMODE_BLEND);
     make_window_clickthrough();
     set_override_redirect();
-    SDL_SetDefaultTextureScaleMode(renderer, SDL_SCALEMODE_PIXELART);
+    //SDL_SetTextureScaleMode(renderer, SDL_SCALEMODE_LINEAR);
 
     neko_init(renderer, window);