sdl_romvideo.c

MPEG-4编解码的实现(包括MPEG4视音频编解码)

		tempRgn = NewRgn();
		if ( ! tempRgn || ! drawRgn || ! gSaveGrayRgn ) {
			goto CLEANUP;
		}
		grayRgn = GetGrayRgn(); /* No need to check for this */
	
		GetPort(&savePort);
		GetWMgrPort(&wMgrPort);

		/* Set the height properly */
		LMSetMBarHeight(gSaveMenuBar);

		/* Restore the old GrayRgn: rounded corners, etc, but not
		   the menubar -- subtract that out first! */
		if (gSaveGrayRgn)
			{
			menuRect = (*GetMainDevice())->gdRect;
			menuRect.bottom = menuRect.top + gSaveMenuBar;
			RectRgn(menuRgn, &menuRect);

			DiffRgn(grayRgn, gSaveGrayRgn, drawRgn); 	/* What do we inval? */
			DiffRgn(drawRgn, menuRgn, drawRgn);			/* Clip out the menu */
			
			/* Now redraw the corners and other bits black */
			SetPort(wMgrPort);
			GetClip(tempRgn);
			SetClip(drawRgn);
			GetForeColor(&saveRGB);
			RGBForeColor(&blackRGB);
			PaintRgn(drawRgn);
			RGBForeColor(&saveRGB);
			SetClip(tempRgn);
			SetPort(savePort);
			
			UnionRgn(drawRgn, menuRgn, drawRgn);		/* Put back the menu */

			/* Now actually restore the GrayRgn */
			CopyRgn(gSaveGrayRgn, grayRgn);
			DisposeRgn(gSaveGrayRgn);
			gSaveGrayRgn = nil;
			}

		/* Modify the vis regions of exposed windows and draw menubar */
		window = (FrontWindow()) ? FrontWindow() : (WindowPtr) -1L;
		PaintBehind(window, drawRgn);
		CalcVisBehind(window, drawRgn);
		DrawMenuBar();

		SetPort(savePort);
		gSaveMenuBar = 0;

		/* Now show the control strip if it's present */
		if (!Gestalt(gestaltControlStripAttr, &response) && 
				(response & (1L << gestaltControlStripExists)))
			{
			if (gSaveCSVis && !SBIsControlStripVisible())
				SBShowHideControlStrip(true);
			gSaveCSVis = true;
			}

		/* Yield time so that floaters can catch up */
		EventAvail(0, &theEvent);
		EventAvail(0, &theEvent);
		EventAvail(0, &theEvent);
		EventAvail(0, &theEvent);
		}

CLEANUP:

	if (drawRgn) DisposeRgn(drawRgn);
	if (menuRgn) DisposeRgn(menuRgn);
	if (tempRgn) DisposeRgn(tempRgn);
#endif /* !TARGET_API_MAC_CARBON */
}

/* Various screen update functions available */
static void ROM_DirectUpdate(_THIS, int numrects, SDL_Rect *rects);
static void ROM_WindowUpdate(_THIS, int numrects, SDL_Rect *rects);

static void ROM_UnsetVideoMode(_THIS, SDL_Surface *current)
{
	/* Free the current window, if any */
	if ( SDL_Window != nil ) {
		GWorldPtr memworld;
		
		/* Handle OpenGL support */
		Mac_GL_Quit(this);

		memworld = (GWorldPtr)GetWRefCon(SDL_Window);
		if ( memworld != nil ) {
			UnlockPixels(GetGWorldPixMap(memworld));
			DisposeGWorld(memworld);
		}
		if ( (current->flags & SDL_FULLSCREEN) == SDL_FULLSCREEN ) {
#if USE_QUICKTIME
			EndFullScreen(fullscreen_ctx, nil);
			SDL_Window = nil;
#else
			ROM_ShowMenuBar(this);
#endif
		}
	}
	current->pixels = NULL;
	current->flags &= ~(SDL_HWSURFACE|SDL_FULLSCREEN);
}

static SDL_Surface *ROM_SetVideoMode(_THIS, SDL_Surface *current,
				int width, int height, int bpp, Uint32 flags)
{
	Rect wrect, orect;
#if TARGET_API_MAC_CARBON
	Rect tmprect;
#endif

	/* Free any previous video mode */
	ROM_UnsetVideoMode(this, current);

	/* Create the ROM window and SDL video surface */
	current->flags = 0;		/* Clear flags */
	current->w = width;
	current->h = height;
	SetRect(&wrect, 0, 0, width, height);
	if ( SDL_Window ) {
		/* If we recreate the window, don't move it around */
#if TARGET_API_MAC_CARBON
		orect = *GetWindowPortBounds(SDL_Window, &tmprect);
#else
		orect = SDL_Window->portRect;
#endif
		OffsetRect(&wrect, orect.left, orect.top);
	} else {
		/* Center the window the first time we show it */
		OffsetRect(&wrect,
		(SDL_modelist[0]->w-width)/2, (SDL_modelist[0]->h-height)/2);
	}

#if MACOSX && !USE_QUICKTIME
	/* Hum.. fullscreen mode is broken */
	flags &= ~SDL_FULLSCREEN;
#endif
	if ( (flags & SDL_FULLSCREEN) == SDL_FULLSCREEN ) {
		/* Create the fullscreen window and use screen bits */
		current->flags |= SDL_HWSURFACE|SDL_FULLSCREEN;
		if ( SDL_Window ) {
			DisposeWindow(SDL_Window);
		}
#if USE_QUICKTIME
		BeginFullScreen(&fullscreen_ctx, nil, 0,0, &SDL_Window, nil, 0);
#else
		SDL_Window = NewCWindow(nil, &wrect, "\p", true, plainDBox,
						(WindowPtr)-1, false, 0);
		ROM_HideMenuBar(this);
#endif
		current->pitch = (**(**SDL_Display).gdPMap).rowBytes & 0x3FFF;
		current->pixels = (**(**SDL_Display).gdPMap).baseAddr;
		this->UpdateRects = ROM_DirectUpdate;
	} else {
		GWorldPtr memworld;
		PixMapHandle pixmap;
		int style;

		style = noGrowDocProc;
		if ( flags & SDL_NOFRAME ) {
			style = plainDBox;
			current->flags |= SDL_NOFRAME;
		} else
		if ( flags & SDL_RESIZABLE ) {
			style = zoomDocProc;
			current->flags |= SDL_RESIZABLE;
		}
		if ( SDL_Window && (style == current_style) ) {
			/* Resize existing window, if necessary */
			if ( ((orect.right-orect.left) != width) ||
			     ((orect.bottom-orect.top) != height) ) {
				SizeWindow(SDL_Window, width, height, false);
			}
		} else {
			/* Recreate the window in the new style */
			if ( SDL_Window ) {
				DisposeWindow(SDL_Window);
			}
			SDL_Window = NewCWindow(nil, &wrect, "\p", true,
			                        style, (WindowPtr)-1, true, 0);

			/* Set the window title, if any */
			{ char *title;
				SDL_WM_GetCaption(&title, NULL);
				if ( title ) {
					Mac_SetCaption(this, title, NULL);
				}
			}
		}
		current_style = style;
		SetPalette(SDL_Window, SDL_CPal, false);
		ActivatePalette(SDL_Window);
		if ( NewGWorld(&memworld, 0,
#if TARGET_API_MAC_CARBON
			       GetWindowPortBounds(SDL_Window, &tmprect),
#else
			       &SDL_Window->portRect,
#endif
			       SDL_CTab, nil, 0) != noErr ) {
			SDL_SetError("NewGWorld() failed");
			return(NULL);
		}
		SetWRefCon(SDL_Window, (long)memworld);
		pixmap = GetGWorldPixMap(memworld);
		LockPixels(pixmap);
		current->pitch = (**pixmap).rowBytes & 0x3FFF;
		current->pixels = GetPixBaseAddr(pixmap);
		this->UpdateRects = ROM_WindowUpdate;
	}
	SetPortWindowPort(SDL_Window);
	SelectWindow(SDL_Window);

	/* Handle OpenGL support */
	if ( flags & SDL_OPENGL ) {
		if ( Mac_GL_Init(this) == 0 ) {
			current->flags |= SDL_OPENGL;
		} else {
			current = NULL;
		}
	}
	
	if ( (flags & SDL_HWPALETTE) && (flags & SDL_FULLSCREEN) )
	   current->flags |= SDL_HWPALETTE;
	   
	/* We're live! */
	return(current);
}

/* We don't actually allow hardware surfaces other than the main one */
static int ROM_AllocHWSurface(_THIS, SDL_Surface *surface)
{
	return(-1);
}
static void ROM_FreeHWSurface(_THIS, SDL_Surface *surface)
{
	return;
}
static int ROM_LockHWSurface(_THIS, SDL_Surface *surface)
{
	return(0);
}
static void ROM_UnlockHWSurface(_THIS, SDL_Surface *surface)
{
	return;
}

static void ROM_DirectUpdate(_THIS, int numrects, SDL_Rect *rects)
{
	/* The application is already updating the visible video memory */
	return;
}

static void ROM_WindowUpdate(_THIS, int numrects, SDL_Rect *rects)
{
	GWorldPtr memworld;
	GrafPtr saveport;
	CGrafPtr thePort;
	const BitMap *memBits;
	const BitMap *winBits;
	int i;
	Rect update;
	
	/* Copy from the offscreen GWorld to the window port */
	GetPort(&saveport);
	SetPortWindowPort(SDL_Window);
	thePort = GetWindowPort(SDL_Window);
	memworld = (GWorldPtr)GetWRefCon(SDL_Window);
#if TARGET_API_MAC_CARBON
	memBits = GetPortBitMapForCopyBits((CGrafPtr) memworld);
#else
	memBits = &((GrafPtr)memworld)->portBits;
#endif
#if TARGET_API_MAC_CARBON
	winBits = GetPortBitMapForCopyBits(thePort);
#else
	winBits = &SDL_Window->portBits;
#endif
	for ( i=0; i<numrects; ++i ) {
		update.left = rects[i].x;
		update.right = rects[i].x+rects[i].w;
		update.top = rects[i].y;
		update.bottom = rects[i].y+rects[i].h;
		CopyBits(memBits, winBits,
			 &update, &update, srcCopy, nil);
	}
#if TARGET_API_MAC_CARBON
	if ( QDIsPortBuffered(thePort) ) {
		QDFlushPortBuffer(thePort, NULL);
	}
#endif
	SetPort(saveport);
}

static int ROM_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors)
{
	CTabHandle cTab;
	int i;

	/* Get the colortable from the either the display or window */
	if ( (this->screen->flags & SDL_FULLSCREEN) == SDL_FULLSCREEN ) {
		cTab = (**(**SDL_Display).gdPMap).pmTable;
	} else {
		cTab = SDL_CTab;
	}

	/* Verify the range of colors */
	if ( (firstcolor+ncolors) > ((**cTab).ctSize+1) ) {
		return(0);
	}
	
	/* Set the screen palette and update the display */
	for ( i=0; i< ncolors; ++i ) {
	        int j = firstcolor + i;
		(**cTab).ctTable[j].value = j;
		(**cTab).ctTable[j].rgb.red = colors[i].r << 8 | colors[i].r;
		(**cTab).ctTable[j].rgb.green = colors[i].g << 8 | colors[i].g;
		(**cTab).ctTable[j].rgb.blue = colors[i].b << 8 | colors[i].b;
	}
//	if ( (this->screen->flags & SDL_FULLSCREEN) == SDL_FULLSCREEN ) 
{
		GDevice **odisplay;
		odisplay = GetGDevice();
		SetGDevice(SDL_Display);
		SetEntries(0, (**cTab).ctSize, (ColorSpec *)&(**cTab).ctTable);
		SetGDevice(odisplay);
	}
	return(1);
}

void ROM_VideoQuit(_THIS)
{
	int i;

	/* Free current video mode */
	ROM_UnsetVideoMode(this, this->screen);
	if ( SDL_Window ) {
		DisposeWindow(SDL_Window);
		SDL_Window = nil;
	}

	/* Free palette and restore original one */
	if ( SDL_CTab != nil ) {
		DisposeHandle((Handle)SDL_CTab);
		SDL_CTab = nil;
	}
	if ( SDL_CPal != nil ) {
		DisposePalette(SDL_CPal);
		SDL_CPal = nil;
	}
	RestoreDeviceClut(GetMainDevice());

	/* Free list of video modes */
	if ( SDL_modelist != NULL ) {
		for ( i=0; SDL_modelist[i]; ++i ) {
			free(SDL_modelist[i]);
		}
		free(SDL_modelist);
		SDL_modelist = NULL;
	}
}