File diff r5583:398b6d85e7a3 → r5584:545d748cc681
src/sdl.cpp
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new file 100644
 
/* $Id$ */
 

	
 
#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