Reorganize arch a bit. Multiple architectures might want to share

a non-default implementation of a driver, and organizing them by
architecture doesn't handle that very well.

stepmania/src/arch/LoadingWindow/LoadingWindow_SDL.cpp

@@ -0,0 +1,48 @@
+#include "../../stdafx.h"
+
+#include "SDL_Image.h"
+#include "LoadingWindow_SDL.h"
+
+#include "loading.xpm"
+
+LoadingWindow_SDL::LoadingWindow_SDL()
+{
+    /* Initialize the SDL library */
+    if( SDL_InitSubSystem(SDL_INIT_VIDEO) < 0 )
+        throw RageException( "Couldn't initialize SDL: %s\n", SDL_GetError() );
+
+	/* Load the BMP file into a surface */
+    SDL_Surface *image = IMG_ReadXPMFromArray(loading);
+    if( image == NULL )
+        throw RageException("Couldn't load loading.bmp: %s\n",SDL_GetError());
+
+    /* Initialize the display in a 640x480 16-bit mode */
+    loading_screen = SDL_SetVideoMode(image->w, image->h, 16, SDL_SWSURFACE|SDL_ANYFORMAT|SDL_NOFRAME);
+    if( loading_screen == NULL )
+        throw RageException( "Couldn't initialize loading window: %s\n", SDL_GetError() );
+
+    /* Blit onto the screen surface */
+    SDL_BlitSurface(image, NULL, loading_screen, NULL);
+
+    /* Free the allocated BMP surface */
+    SDL_FreeSurface(image);
+
+
+}
+
+LoadingWindow_SDL::~LoadingWindow_SDL()
+{
+	SDL_QuitSubSystem( SDL_INIT_VIDEO );
+}
+
+void LoadingWindow_SDL::Paint()
+{
+	SDL_UpdateRect(loading_screen, 0,0,0,0);
+}
+
+/*
+ * Copyright (c) 2001-2002 by the person(s) listed below.  All rights reserved.
+ *
+ * Chris Danford
+ * Glenn Maynard
+ */