sdl_epocvideo.cpp

SDL库 在进行视频显示程序spcaview安装时必须的库文件

#endif
	// Draw black background
	Mem::FillZ(screenBuffer, Private->EPOC_BytesPerScreen);

#if 0
    for (int y = 0; y < Private->EPOC_ScreenSize.iHeight; y++) {
		for (int x = 0; x < Private->EPOC_ScreenSize.iWidth; x++) {
#ifdef SYMBIAN_CRYSTAL
			const TUint16 color = 0; // ((x+y)>>1) & 0xf; /* Draw blue stripes pattern, because in e.g. 320x200 mode there is a big background area*/
#else // SYMBIAN_SERIES60
            const TUint16 color = 0; /* Draw black background */
#endif
            *screenBuffer++ = color;
		}
	}
#endif
}


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

static int EPOC_LockHWSurface(_THIS, SDL_Surface* /*surface*/)
{
	return(0);
}
static void EPOC_UnlockHWSurface(_THIS, SDL_Surface* /*surface*/)
{
	return;
}

static int EPOC_FlipHWSurface(_THIS, SDL_Surface* /*surface*/)
{
	return(0);
}

static void EPOC_DirectUpdate(_THIS, int numrects, SDL_Rect *rects)
{
    //TInt focusWindowGroupId = Private->EPOC_WsSession.GetFocusWindowGroup();//these are async services
   // if (focusWindowGroupId != Private->EPOC_WsWindowGroupID) {              //for that cannot be called from
                                                                            //SDL threads ???
    if (!Private->EPOC_IsWindowFocused)
        {
        /* Force focus window to redraw again for cleaning away SDL screen graphics */
/*
        TInt pos = Private->EPOC_WsWindowGroup.OrdinalPosition();
        Private->EPOC_WsWindowGroup.SetOrdinalPosition(0, KMaxTInt);
       	TRect  rect = TRect(Private->EPOC_WsWindow.Size());
        Private->EPOC_WsWindow.Invalidate(rect);
        Private->EPOC_WsWindowGroup.SetOrdinalPosition(pos, ECoeWinPriorityNormal);
       */ /* If this is not the topmost window, wait here! Sleep for 1 second to give cpu time to 
           multitasking and poll for being the topmost window.
        */
    //    if (Private->EPOC_WsSession.GetFocusWindowGroup() != Private->EPOC_WsWindowGroupID) {
           
		   /* !!TODO: Could call GetRedraw() etc. for WsSession and redraw the screen if needed. That might be 
		      needed if a small dialog comes in front of Game screen.
		   */
           // while (Private->EPOC_WsSession.GetFocusWindowGroup() != Private->EPOC_WsWindowGroupID)
        
        SDL_PauseAudio(1);
        SDL_Delay(1000);
        return;
      //  }

    //    RedrawWindowL(_this);  
    }

    SDL_PauseAudio(0);

	// if we are not focused, do not draw
//	if (!Private->EPOC_IsWindowFocused)
//		return;
#if defined(__WINS__) || defined(TEST_BM_DRAW)
	TBitmapUtil lock(Private->EPOC_Bitmap);	
    lock.Begin(TPoint(0,0)); // Lock bitmap heap
	Private->EPOC_WindowGc->Activate(Private->EPOC_WsWindow);
    TUint16* screenBuffer = (TUint16*)Private->EPOC_Bitmap->DataAddress();
#else
    TUint16* screenBuffer = (TUint16*)Private->EPOC_FrameBuffer;
#endif

	if (Private->EPOC_ScreenOrientation == CFbsBitGc::EGraphicsOrientationRotated270)
		DirectDrawRotated(_this, numrects, rects, screenBuffer);
	else
		DirectDraw(_this, numrects, rects, screenBuffer);
    
   
#if defined(__WINS__) || defined(TEST_BM_DRAW)

	TRect  rect = TRect(Private->EPOC_WsWindow.Size());
	Private->EPOC_WsWindow.Invalidate(rect);
	Private->EPOC_WsWindow.BeginRedraw(rect);
	Private->EPOC_WindowGc->BitBlt(TPoint(), Private->EPOC_Bitmap);
	Private->EPOC_WsWindow.EndRedraw();
	Private->EPOC_WindowGc->Deactivate();
    lock.End(); // Unlock bitmap heap
	Private->EPOC_WsSession.Flush();
#else
#ifndef SYMBIAN_CRYSTAL
	// This is not needed in Crystal. What is the performance penalty in SERIES60?
    TRect  rect2 = TRect(Private->EPOC_WsWindow.Size());
    
    Private->EPOC_DrawDevice->UpdateRegion(rect2); // Should we update rects parameter area only??
    Private->EPOC_DrawDevice->Update();
#endif
#endif

    /* Update virtual cursor. !!Do not yet work properly
    Private->EPOC_WsSession.SetPointerCursorPosition(Private->EPOC_WsSession.PointerCursorPosition());
    */

    /*static int foo = 1;

    	for ( int i=0; i < numrects; ++i ) {
        const SDL_Rect& currentRect = rects[i];
        SDL_Rect rect2;
        rect2.x = currentRect.x;
        rect2.y = currentRect.y;
        rect2.w = currentRect.w;
        rect2.h = currentRect.h;

        if (rect2.w <= 0 || rect2.h <= 0) 
            continue;

    
    foo++;
    if((foo % 200) == 0)
        {
        SDL_TRACE1("foo %d", foo);
        CFbsBitmap* b = new (ELeave) CFbsBitmap;
        SDL_TRACE1("bee %d", (int)b);
        int e = b->Create(TSize(currentRect.w, currentRect.h), Private->EPOC_DisplayMode);
        
        SDL_TRACE1("err %d", e);
        if(e != KErrNone)
            User::Panic(_L("damn"), e);

        TBitmapUtil u(b);
        u.Begin(TPoint(0, 0));
        TUint32* d = b->DataAddress();
        
        SDL_TRACE1("addr %d", (int)d);

        for(TInt o = 0; o < currentRect.h; o++)
            for(TInt p = 0; p < currentRect.w; p++)
                {
                u.SetPos(TPoint(p, o));
                u.SetPixel(0xFFFF);
                }

        SDL_TRACE1("w %d", (int)currentRect.w);
        SDL_TRACE1("h %d", (int)currentRect.h);

        SDL_TRACE1("addr %d", (int)Private->EPOC_DisplayMode);

        
        const TUint f = (TUint)Private->EPOC_FrameBuffer;
        const TUint y = (TUint)Private->EPOC_BytesPerScreen;

        
        SDL_TRACE1("frame %u", f);
        SDL_TRACE1("bytes %u", y);

        Mem::Copy(d, Private->EPOC_FrameBuffer, Private->EPOC_BytesPerScreen);

        SDL_TRACE("kopied");

        u.End();
        TBuf<32> name;
        name.Format(_L("C:\\nokia\\images\\doom%d.mbm"), (foo / 200));
        e= b->Save(name);
        if(e != KErrNone)
            User::Panic(_L("damned"), e);
        delete b;
            }}*/
}


void DirectDraw(_THIS, int numrects, SDL_Rect *rects, TUint16* screenBuffer)
{
	TInt i;

    const TInt sourceNumBytesPerPixel = ((_this->screen->format->BitsPerPixel-1)>>3) + 1;   
    const TPoint fixedOffset = Private->EPOC_ScreenOffset;   
    const TInt screenW = _this->screen->w;
    const TInt screenH = _this->screen->h;
    const TInt sourceScanlineLength = screenW;
    const TInt targetScanlineLength = Private->EPOC_ScreenSize.iWidth;

	/* Render the rectangles in the list */

	for ( i=0; i < numrects; ++i ) {
        const SDL_Rect& currentRect = rects[i];
        SDL_Rect rect2;
        rect2.x = currentRect.x;
        rect2.y = currentRect.y;
        rect2.w = currentRect.w;
        rect2.h = currentRect.h;

        if (rect2.w <= 0 || rect2.h <= 0) /* sanity check */
            continue;

        /* All variables are measured in pixels */

        /* Check rects validity, i.e. upper and lower bounds */
        TInt maxX = Min(screenW - 1, rect2.x + rect2.w - 1);
        TInt maxY = Min(screenH - 1, rect2.y + rect2.h - 1);
        if (maxX < 0 || maxY < 0) /* sanity check */
            continue;
		/* Clip from bottom */
        maxY = Min(maxY, Private->EPOC_ScreenSize.iHeight-1); 
		/* TODO: Clip from the right side */

        const TInt sourceRectWidth = maxX - rect2.x + 1;
        const TInt sourceRectWidthInBytes = sourceRectWidth * sourceNumBytesPerPixel;
        const TInt sourceRectHeight = maxY - rect2.y + 1;
        const TInt sourceStartOffset = rect2.x + rect2.y * sourceScanlineLength;
		const TUint skipValue = 1; // no skip

        TInt targetStartOffset = fixedOffset.iX + rect2.x + (fixedOffset.iY +rect2.y) * targetScanlineLength;   
        
        // Nokia7650 native mode: 12 bpp --> 12 bpp
        //

        switch (_this->screen->format->BitsPerPixel)
			{
		case 12:
			{
			TUint16* bitmapLine = (TUint16*)_this->screen->pixels + sourceStartOffset;
			TUint16* screenMemory = screenBuffer + targetStartOffset;
			if (skipValue == 1)
				{
				for(TInt y = 0 ; y < sourceRectHeight ; y++)
					{
					Mem::Copy(screenMemory, bitmapLine, sourceRectWidthInBytes);
					}
					bitmapLine += sourceScanlineLength;
					screenMemory += targetScanlineLength;
				}
			else
				{
				for(TInt y = 0 ; y < sourceRectHeight ; y++)
					{
					//TODO: optimize: separate loops for 1, 2 and n skip. Mem::Copy() can be used in unscaled case.
					TUint16* bitmapPos = bitmapLine; /* 2 bytes per pixel */
					TUint16* screenMemoryLinePos = screenMemory; /* 2 bytes per pixel */
					for(TInt x = 0 ; x < sourceRectWidth ; x++)
						{					
						__ASSERT_DEBUG(screenMemory < (screenBuffer + Private->EPOC_ScreenSize.iWidth * Private->EPOC_ScreenSize.iHeight), User::Panic(_L("SDL"), KErrCorrupt));
						__ASSERT_DEBUG(screenMemory >= screenBuffer, User::Panic(_L("SDL"), KErrCorrupt));
						__ASSERT_DEBUG(bitmapLine < ((TUint16*)_this->screen->pixels + (_this->screen->w * _this->screen->h)), User::Panic(_L("SDL"), KErrCorrupt));
						__ASSERT_DEBUG(bitmapLine >=  (TUint16*)_this->screen->pixels, User::Panic(_L("SDL"), KErrCorrupt));
                    
						*screenMemoryLinePos++ = *bitmapPos;
						bitmapPos+=skipValue;
						}
					bitmapLine += sourceScanlineLength;
					screenMemory += targetScanlineLength;
					}
				}
			}
			break;
        // 256 color paletted mode: 8 bpp  --> 12 bpp
        //
		default:
			{
            if(Private->EPOC_BytesPerPixel <= 2)
                {
			    TUint8* bitmapLine = (TUint8*)_this->screen->pixels + sourceStartOffset;
                TUint16* screenMemory = screenBuffer + targetStartOffset;
				    for(TInt y = 0 ; y < sourceRectHeight ; y++)
					    {
					    TUint8* bitmapPos = bitmapLine; /* 1 byte per pixel */
					    TUint16* screenMemoryLinePos = screenMemory; /* 2 bytes per pixel */
					    /* Convert each pixel from 256 palette to 4k color values */
					    for(TInt x = 0 ; x < sourceRectWidth ; x++)
						    {
						    __ASSERT_DEBUG(screenMemoryLinePos < (screenBuffer + (Private->EPOC_ScreenSize.iWidth * Private->EPOC_ScreenSize.iHeight)), User::Panic(_L("SDL"), KErrCorrupt));
						    __ASSERT_DEBUG(screenMemoryLinePos >= screenBuffer, User::Panic(_L("SDL"), KErrCorrupt));
						    __ASSERT_DEBUG(bitmapPos < ((TUint8*)_this->screen->pixels + (_this->screen->w * _this->screen->h)), User::Panic(_L("SDL"), KErrCorrupt));
						    __ASSERT_DEBUG(bitmapPos >= (TUint8*)_this->screen->pixels, User::Panic(_L("SDL"), KErrCorrupt));               
						    *screenMemoryLinePos++ = EPOC_HWPalette_256_to_Screen[*bitmapPos++];
    //						bitmapPos+=skipValue; //TODO: optimize: separate loops for 1, 2 and n skip
						    }
					    bitmapLine += sourceScanlineLength;
					    screenMemory += targetScanlineLength;
					    }
                }
            else
                {
                TUint8* bitmapLine = (TUint8*)_this->screen->pixels + sourceStartOffset;
                TUint32* screenMemory = reinterpret_cast<TUint32*>(screenBuffer + targetStartOffset);
				    for(TInt y = 0 ; y < sourceRectHeight ; y++)
					    {
					    TUint8* bitmapPos = bitmapLine; /* 1 byte per pixel */
					    TUint32* screenMemoryLinePos = screenMemory; /* 2 bytes per pixel */
					    /* Convert each pixel from 256 palette to 4k color values */
					    for(TInt x = 0 ; x < sourceRectWidth ; x++)
						    {
						    __ASSERT_DEBUG(screenMemoryLinePos < (reinterpret_cast<TUint32*>(screenBuffer) + (Private->EPOC_ScreenSize.iWidth * Private->EPOC_ScreenSize.iHeight)), User::Panic(_L("SDL"), KErrCorrupt));
						    __ASSERT_DEBUG(screenMemoryLinePos >= reinterpret_cast<TUint32*>(screenBuffer), User::Panic(_L("SDL"), KErrCorrupt));
						    __ASSERT_DEBUG(bitmapPos < ((TUint8*)_this->screen->pixels + (_this->screen->w * _this->screen->h)), User::Panic(_L("SDL"), KErrCorrupt));
						    __ASSERT_DEBUG(bitmapPos >= (TUint8*)_this->screen->pixels, User::Panic(_L("SDL"), KErrCorrupt));               
						    *screenMemoryLinePos++ = EPOC_HWPalette_256_to_Screen[*bitmapPos++];
    //						bitmapPos+=skipValue; //TODO: optimize: separate loops for 1, 2 and n skip
						    }
					    bitmapLine += sourceScanlineLength;
					    screenMemory += targetScanlineLength;
					    }
                }
			}
		} // switch
	} // for
}

/*
void DirectDraw(_THIS, int numrects, SDL_Rect *rects, TUint16* screenBuffer)
{
	TInt i;
    const TInt sourceNumBytesPerPixel = ((_this->screen->format->BitsPerPixel-1)>>3) + 1;   
    const TPoint fixedOffset = Private->EPOC_ScreenOffset;   
    const TInt screenW = _this->screen->w;
    const TInt screenH = _this->screen->h;
    const TInt sourceScanlineLength = screenW;
    const TInt targetScanlineLength = Private->EPOC_ScreenSize.iWidth;

	/* Render the rectangles in the list */

/*	for ( i=0; i < numrects; ++i ) {
        const SDL_Rect& currentRect = rects[i];
        SDL_Rect rect2;
        rect2.x = currentRect.x;