--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/sdl.cpp	Wed Jan 10 18:12:09 2007 +0000
@@ -0,0 +1,139 @@
+/* $Id$ */
+
+#include "stdafx.h"
+
+#ifdef WITH_SDL
+
+#include "openttd.h"
+#include "sdl.h"
+#include <SDL.h>
+
+#ifdef UNIX
+#include <signal.h>
+
+#ifdef __MORPHOS__
+	// The system supplied definition of SIG_DFL is wrong on MorphOS
+	#undef SIG_DFL
+	#define SIG_DFL (void (*)(int))0
+#endif
+#endif
+
+static int _sdl_usage;
+
+#ifdef DYNAMICALLY_LOADED_SDL
+
+#include "win32.h"
+
+#define M(x) x "\0"
+static const char sdl_files[] =
+	M("sdl.dll")
+	M("SDL_Init")
+	M("SDL_InitSubSystem")
+	M("SDL_GetError")
+	M("SDL_QuitSubSystem")
+	M("SDL_UpdateRect")
+	M("SDL_UpdateRects")
+	M("SDL_SetColors")
+	M("SDL_WM_SetCaption")
+	M("SDL_ShowCursor")
+	M("SDL_FreeSurface")
+	M("SDL_PollEvent")
+	M("SDL_WarpMouse")
+	M("SDL_GetTicks")
+	M("SDL_OpenAudio")
+	M("SDL_PauseAudio")
+	M("SDL_CloseAudio")
+	M("SDL_LockSurface")
+	M("SDL_UnlockSurface")
+	M("SDL_GetModState")
+	M("SDL_Delay")
+	M("SDL_Quit")
+	M("SDL_SetVideoMode")
+	M("SDL_EnableKeyRepeat")
+	M("SDL_EnableUNICODE")
+	M("SDL_VideoDriverName")
+	M("SDL_ListModes")
+	M("SDL_GetKeyState")
+	M("SDL_LoadBMP_RW")
+	M("SDL_RWFromFile")
+	M("SDL_SetColorKey")
+	M("SDL_WM_SetIcon")
+	M("SDL_MapRGB")
+	M("")
+;
+#undef M
+
+SDLProcs sdl_proc;
+
+static const char *LoadSdlDLL(void)
+{
+	if (sdl_proc.SDL_Init != NULL)
+		return NULL;
+	if (!LoadLibraryList((Function *)(void *)&sdl_proc, sdl_files))
+		return "Unable to load sdl.dll";
+	return NULL;
+}
+
+#endif // DYNAMICALLY_LOADED_SDL
+
+
+#ifdef UNIX
+static void SdlAbort(int sig)
+{
+	/* Own hand-made parachute for the cases of failed assertions. */
+	SDL_CALL SDL_Quit();
+
+	switch (sig) {
+		case SIGSEGV:
+		case SIGFPE:
+			signal(sig, SIG_DFL);
+			raise(sig);
+			break;
+
+		default:
+			break;
+	}
+}
+#endif
+
+
+const char* SdlOpen(uint32 x)
+{
+#ifdef DYNAMICALLY_LOADED_SDL
+	{
+		const char *s = LoadSdlDLL();
+		if (s != NULL) return s;
+	}
+#endif
+	if (_sdl_usage++ == 0) {
+		if (SDL_CALL SDL_Init(x) == -1)
+			return SDL_CALL SDL_GetError();
+	} else if (x != 0) {
+		if (SDL_CALL SDL_InitSubSystem(x) == -1)
+			return SDL_CALL SDL_GetError();
+	}
+
+#ifdef UNIX
+	signal(SIGABRT, SdlAbort);
+	signal(SIGSEGV, SdlAbort);
+	signal(SIGFPE, SdlAbort);
+#endif
+
+	return NULL;
+}
+
+void SdlClose(uint32 x)
+{
+	if (x != 0)
+		SDL_CALL SDL_QuitSubSystem(x);
+	if (--_sdl_usage == 0) {
+		SDL_CALL SDL_Quit();
+		#ifdef UNIX
+		signal(SIGABRT, SIG_DFL);
+		signal(SIGSEGV, SIG_DFL);
+		signal(SIGFPE, SIG_DFL);
+		#endif
+	}
+}
+
+#endif