sdl_gapivideo.c

SDL库 在进行视频显示程序spcaview安装时必须的库文件

		this->hidden->gxProperties.cbyPitch = g_RawFrameBufferInfo.cyStride;
		this->hidden->gxProperties.cxWidth = g_RawFrameBufferInfo.cxPixels;
		this->hidden->gxProperties.cyHeight = g_RawFrameBufferInfo.cyPixels;
		this->hidden->videoMem = g_RawFrameBufferInfo.pFramePointer;
		this->hidden->useVga = 1;

		switch( g_RawFrameBufferInfo.wFormat )
		{
		case FORMAT_565:
			this->hidden->gxProperties.ffFormat = kfDirect565;
			break;
		case FORMAT_555:
			this->hidden->gxProperties.ffFormat = kfDirect555;
			break;
		default:
			/* unknown pixel format, try define by BPP! */
			switch( g_RawFrameBufferInfo.wBPP )
			{
			case 4:
			case 8:
				this->hidden->gxProperties.ffFormat = kfDirect;
			case 16:
				this->hidden->gxProperties.ffFormat = kfDirect565;
			default:
				this->hidden->gxProperties.ffFormat = kfDirect;
				break;
			}
		}
	}

	if( this->hidden->gxProperties.cBPP != 16 )
	{
		this->hidden->gapiOrientation = SDL_ORIENTATION_UP;
	} else
	if( (this->hidden->gxProperties.cbxPitch > 0) && (this->hidden->gxProperties.cbyPitch > 0 ))
	{
		this->hidden->gapiOrientation = SDL_ORIENTATION_UP;
	} else
	if( (this->hidden->gxProperties.cbxPitch > 0) && (this->hidden->gxProperties.cbyPitch < 0 ))
	{
		this->hidden->gapiOrientation = SDL_ORIENTATION_RIGHT; // ipaq 3660
	} else
	if( (this->hidden->gxProperties.cbxPitch < 0) && (this->hidden->gxProperties.cbyPitch > 0 ))
	{
		this->hidden->gapiOrientation = SDL_ORIENTATION_LEFT; // ipaq 3800
	}
}

static void GAPI_CreatePalette(int ncolors, SDL_Color *colors)
{
  // Setup a custom color palette
   BYTE buffer[ sizeof(LOGPALETTE) + 255 * sizeof(PALETTEENTRY) ];
   int i;
   LOGPALETTE*   pLogical = (LOGPALETTE*)buffer;
   PALETTEENTRY* entries  = pLogical->palPalEntry;
   HPALETTE hPalette;
   HDC hdc;

   for (i = 0; i < ncolors; ++i)
   {
      // Find intensity by replicating the bit patterns over a byte
      entries[i].peRed   = colors[i].r;
      entries[i].peGreen = colors[i].g;
      entries[i].peBlue  = colors[i].b;
      entries[i].peFlags = 0;
   }

   // Create the GDI palette object
   pLogical->palVersion    = 0x0300;
   pLogical->palNumEntries = ncolors;

   hPalette = CreatePalette( pLogical );
   ASSERT(hPalette);
	

   // Realize the palette
   hdc = GetDC(0);

   SelectPalette( hdc, hPalette, FALSE );
   RealizePalette( hdc );

   ReleaseDC( 0, hdc );
   DeleteObject( hPalette );
}

int GAPI_VideoInit(_THIS, SDL_PixelFormat *vformat)
{
	int i,bpp;

	/* Create the window */
	if ( DIB_CreateWindow(this) < 0 ) {
		return(-1);
	}

	if( g_hGapiLib )
	{
		FillStructs(this, 0);

		// SDL does not supports 2/4bpp mode, so use 16 bpp
		bpp = gapi->gxProperties.cBPP < 8 ? 16 : gapi->gxProperties.cBPP;
		
		/* set up normal and landscape mode */
		GAPI_AddMode(this, bpp, gapi->gxProperties.cyHeight, gapi->gxProperties.cxWidth);	
		GAPI_AddMode(this, bpp, gapi->gxProperties.cxWidth, gapi->gxProperties.cyHeight);	
	}

	/* add hi-res mode */
	if( g_bRawBufferAvailable && 
		!((gapi->gxProperties.cxWidth == (unsigned)g_RawFrameBufferInfo.cxPixels) && (gapi->gxProperties.cyHeight == (unsigned)g_RawFrameBufferInfo.cyPixels)))
	{
		FillStructs(this, 1);

		// SDL does not supports 2/4bpp mode, so use 16 bpp
		bpp = gapi->gxProperties.cBPP < 8 ? 16 : gapi->gxProperties.cBPP;

		/* set up normal and landscape mode */
		GAPI_AddMode(this, bpp, gapi->gxProperties.cyHeight, gapi->gxProperties.cxWidth);	
		GAPI_AddMode(this, bpp, gapi->gxProperties.cxWidth, gapi->gxProperties.cyHeight);	
	}

	/* Determine the current screen size */
	this->info.current_w = gapi->gxProperties.cxWidth;
	this->info.current_h = gapi->gxProperties.cyHeight;

	/* Sort the mode lists */
	for ( i=0; i<NUM_MODELISTS; ++i ) {
		if ( gapi->SDL_nummodes[i] > 0 ) {
			SDL_qsort(gapi->SDL_modelist[i], gapi->SDL_nummodes[i], sizeof *gapi->SDL_modelist[i], cmpmodes);
		}
	}

	vformat->BitsPerPixel = this->hidden->gxProperties.cBPP < 8 ? 16 : (unsigned char)this->hidden->gxProperties.cBPP;

	// Get color mask
	if (this->hidden->gxProperties.ffFormat & kfDirect565) {
		vformat->BitsPerPixel = 16;
		vformat->Rmask = 0x0000f800;
		vformat->Gmask = 0x000007e0;
		vformat->Bmask = 0x0000001f;
		this->hidden->videoMode = GAPI_DIRECT_565;
	}
	else
	if (this->hidden->gxProperties.ffFormat & kfDirect555) {
		vformat->BitsPerPixel = 16;
		vformat->Rmask = 0x00007c00;
		vformat->Gmask = 0x000003e0;
		vformat->Bmask = 0x0000001f;
		this->hidden->videoMode = GAPI_DIRECT_555;
	}
	else
	if ((this->hidden->gxProperties.ffFormat & kfDirect) && (this->hidden->gxProperties.cBPP < 8)) {
		// We'll perform the conversion
		vformat->BitsPerPixel = 16;
		vformat->Rmask = 0x0000f800; // 16 bit 565
		vformat->Gmask = 0x000007e0;
		vformat->Bmask = 0x0000001f;
		if (this->hidden->gxProperties.ffFormat & kfDirectInverted)
			this->hidden->invert = (1 << this->hidden->gxProperties.cBPP) - 1;
		this->hidden->colorscale = this->hidden->gxProperties.cBPP < 8 ? 8 - this->hidden->gxProperties.cBPP : 0;
		this->hidden->videoMode = GAPI_MONO;
	}
	else
	if (this->hidden->gxProperties.ffFormat & kfPalette) {
		this->hidden->videoMode = GAPI_PALETTE;
	} 

	/* We're done! */
	return(0);
}

SDL_Rect **GAPI_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags)
{
	return(this->hidden->SDL_modelist[((format->BitsPerPixel+7)/8)-1]);
//  	 return (SDL_Rect **) -1;
}

SDL_Surface *GAPI_SetVideoMode(_THIS, SDL_Surface *current,
				int width, int height, int bpp, Uint32 flags)
{
	SDL_Surface *video; 
	Uint32 Rmask, Gmask, Bmask; 
	DWORD style; 
	SDL_Rect allScreen;

	if( bpp < 4 )
	{
		SDL_SetError("1 bpp and 2 bpp modes is not implemented yet!");
		return 0;
	}

	/* Recalculate bitmasks if necessary */
	if (bpp == current->format->BitsPerPixel) {
		video = current;
	}
	else {
		switch(bpp) {
			case 8:
				Rmask = 0;
				Gmask = 0;
				Bmask = 0;
				break;
			case 15:				
			case 16:
				/* Default is 565 unless the display is specifically 555 */
				if (this->hidden->gxProperties.ffFormat & kfDirect555) {
					Rmask = 0x00007c00;
					Gmask = 0x000003e0;
					Bmask = 0x0000001f;
				}
				else {
					Rmask = 0x0000f800;
					Gmask = 0x000007e0;
					Bmask = 0x0000001f;
				}
				break;
			case 24:
			case 32:
				Rmask = 0x00ff0000;
				Gmask = 0x0000ff00;
				Bmask = 0x000000ff;
				break;
			default:
				SDL_SetError("Unsupported Bits Per Pixel format requested");
				return NULL;
		}
		video = SDL_CreateRGBSurface(SDL_SWSURFACE,
					0, 0, bpp, Rmask, Gmask, Bmask, 0);
		if ( video == NULL ) {
			SDL_OutOfMemory();
			return(NULL);
		}
	}

	gapi->userOrientation = SDL_ORIENTATION_UP;
	video->flags = SDL_FULLSCREEN;	/* Clear flags, GAPI supports fullscreen only */

	/* GAPI or VGA? */
	if( g_hGapiLib )
	{
		FillStructs(this, 0);
		if( (((unsigned)width != gapi->gxProperties.cxWidth) || ((unsigned)height != gapi->gxProperties.cyHeight))
			&& (((unsigned)width != gapi->gxProperties.cyHeight) || ((unsigned)height != gapi->gxProperties.cxWidth)))
			FillStructs(this, 1); // gapi is found but we use VGA resolution			
	} else
		FillStructs(this, 1);

	if ( !this->hidden->needUpdate && !this->hidden->videoMem) {
		SDL_SetError("Couldn't get address of video memory, may be unsupported device or bug");
		return(NULL);
	}

	/* detect user landscape mode */
	if( (width > height) && (GetSystemMetrics(SM_CXSCREEN) < GetSystemMetrics(SM_CYSCREEN))) 
		gapi->userOrientation = SDL_ORIENTATION_RIGHT;

	/* shall we apply hires fix? for example when we do not use hires resource */
	gapi->hiresFix = 0;
	if( gapi->userOrientation == SDL_ORIENTATION_RIGHT )
	{
		if( (width > GetSystemMetrics(SM_CYSCREEN)) || (height > GetSystemMetrics(SM_CXSCREEN)))
			gapi->hiresFix = 1;
	} else
		if( (width > GetSystemMetrics(SM_CXSCREEN)) || (height > GetSystemMetrics(SM_CYSCREEN)))
			if( !((width == GetSystemMetrics(SM_CYSCREEN)) && (height == GetSystemMetrics(SM_CXSCREEN)))) // user portrait, device landscape
				gapi->hiresFix = 1;

	switch( gapi->userOrientation )
	{
	case SDL_ORIENTATION_UP:
		gapi->startOffset = 0;
		gapi->dstLineStep = gapi->gxProperties.cbyPitch;
		gapi->dstPixelStep = gapi->gxProperties.cbxPitch;
		break;
	case SDL_ORIENTATION_RIGHT:
		switch( gapi->gapiOrientation )
		{
		case SDL_ORIENTATION_UP:
		case SDL_ORIENTATION_RIGHT:
		case SDL_ORIENTATION_LEFT:
			if( (this->hidden->videoMode == GAPI_MONO) )
				gapi->startOffset = -gapi->gxProperties.cbxPitch + 1; // monochrome mode
			else
				gapi->startOffset = gapi->gxProperties.cbyPitch * (gapi->gxProperties.cyHeight - 1);
				
			gapi->dstLineStep = gapi->gxProperties.cbxPitch;
			gapi->dstPixelStep = -gapi->gxProperties.cbyPitch;
			break;
		}
	}

	video->w = this->hidden->w = width;
	video->h = this->hidden->h = height;
	video->pitch = SDL_CalculatePitch(video); 

	/* Small fix for WinCE/Win32 - when activating window
	   SDL_VideoSurface is equal to zero, so activating code
	   is not called properly for fullscreen windows because
	   macros WINDIB_FULLSCREEN uses SDL_VideoSurface
	*/
	SDL_VideoSurface = video;

	/* GAPI is always fullscreen, title bar is useless */
	style = 0;

	if (!SDL_windowid)
		SetWindowLong(SDL_Window, GWL_STYLE, style);

	/* Allocate bitmap */
	if(gapiBuffer) 
	{
		SDL_free(gapiBuffer);
		gapiBuffer = NULL;
	}
	gapiBuffer = SDL_malloc(video->h * video->pitch);
	video->pixels = gapiBuffer; 

	if ( ! this->hidden->buffer ) {
		SDL_SetError("Couldn't allocate buffer for requested mode");
		return(NULL);
	}

	SDL_memset(gapiBuffer, 255, video->h * video->pitch);
	MoveWindow(SDL_Window, 0, 0, GetSystemMetrics(SM_CXSCREEN), GetSystemMetrics(SM_CYSCREEN), FALSE);
	ShowWindow(SDL_Window, SW_SHOW);
	SetForegroundWindow(SDL_Window);

	/* JC 14 Mar 2006
		Flush the message loop or this can cause big problems later
		Especially if the user decides to use dialog boxes or assert()!
	*/
	WIN_FlushMessageQueue();

	/* Open GAPI display */
	if( !gapi->useVga && this->hidden->useGXOpenDisplay )
		if( !gapi->gxFunc.GXOpenDisplay(SDL_Window, GX_FULLSCREEN) )
		{
			SDL_SetError("Couldn't initialize GAPI");
			return(NULL);
		}

#if REPORT_VIDEO_INFO
	printf("Video properties:\n");
	printf("display bpp: %d\n", gapi->gxProperties.cBPP);
	printf("display width: %d\n", gapi->gxProperties.cxWidth);
	printf("display height: %d\n", gapi->gxProperties.cyHeight);
	printf("x pitch: %d\n", gapi->gxProperties.cbxPitch);
	printf("y pitch: %d\n", gapi->gxProperties.cbyPitch);
	printf("gapi flags: 0x%x\n", gapi->gxProperties.ffFormat);

	if( !gapi->useVga && this->hidden->useGXOpenDisplay && gapi->needUpdate)
	{
		gapi->videoMem = gapi->gxFunc.GXBeginDraw(); 
		gapi->gxFunc.GXEndDraw();
	}

	printf("video memory: 0x%x\n", gapi->videoMem);
	printf("need update: %d\n", gapi->needUpdate);
	printf("hi-res fix: %d\n", gapi->hiresFix);
	printf("VGA is available on the device: %d\n", g_bRawBufferAvailable);
	printf("use raw framebuffer: %d\n", gapi->useVga);
	printf("video surface bpp: %d\n", video->format->BitsPerPixel);
	printf("video surface width: %d\n", video->w);
	printf("video surface height: %d\n", video->h);
#endif


	/* Blank screen */
	allScreen.x = allScreen.y = 0;
	allScreen.w = video->w - 1;
	allScreen.h = video->h - 1;
	GAPI_UpdateRects(this, 1, &allScreen);

	/* We're done */
	return(video);
}

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

/* We need to wait for vertical retrace on page flipped displays */
static int GAPI_LockHWSurface(_THIS, SDL_Surface *surface)
{
	return(0);
}

static void GAPI_UnlockHWSurface(_THIS, SDL_Surface *surface)
{
	return;
}

static int updateLine8to8(_THIS, unsigned char *srcPointer, unsigned char *destPointer, int width, int height, int lines)
{
	if( gapi->dstPixelStep == 1) /* optimized blitting on most devices */
	{
		SDL_memcpy(destPointer, srcPointer, width);
		return 1;
	} else
	{
		// TODO: read 4 pixels, write DWORD
		int step = gapi->dstPixelStep;
		while(width--)
		{
			*destPointer = *srcPointer++;
			destPointer += step;