C++ TRegion::Count方法代码示例

CHuiCanvasGc::TClipRectVisibility CHuiCanvasGc::IsClipped(const TRect& aRect, const TRegion& aClippingRegion) const
    {
    TClipRectVisibility isClipped = EFullyOutside;
    if (!aClippingRegion.Count())
        {
        return EFullyInside;
        }
    
    if (!aRect.IsEmpty() && aClippingRegion.Count())
        {    
#if 0            
        TBool test = EFalse;        
        if (test)
            {
            for (TInt i=0; i<aClippingRegion.Count(); i++)
                {
#ifdef _DEBUG
                RDebug::Print(_L("aClippingRegion Rect: %d %d %d %d"), 
                        aClippingRegion[i].iTl.iX, 
                        aClippingRegion[i].iTl.iY,
                        aClippingRegion[i].iBr.iX,
                        aClippingRegion[i].iBr.iY);
#endif
                }                            
            }
#endif        
        
        if (aClippingRegion.Intersects(aRect))
            {            
            iTempRegion.Clear();
            iTempRegion2.Clear();

            iTempRegion.AddRect(aRect);
            
            iTempRegion2.Intersection(aClippingRegion, iTempRegion);
            iTempRegion2.Tidy();
            
            // Assume it is only partially inside region -> Clipped
            isClipped = EPartialOverlap;
            
            if (iTempRegion2.Count() == 1)
                {
                if (iTempRegion2[0] == aRect)
                    {
                    // Fully inside region -> Not clipped
                    isClipped = EFullyInside;    
                    }                
                }
            
            }
        else
            {
            // No overlap -> aRect is completely outside region -> Clipped
            isClipped = EFullyOutside;    
            }                    
        }
    return isClipped;
    }

void TestRRegion::CheckRectRegion(const TRegion& region,const TRect& rect)
// Check the region matches the rectangle
	{
	const TRect* rlist;

	if (rect.IsEmpty())
		test(region.Count()==0);
	else
		{
		test(region.Count()==1);
		rlist=region.RectangleList();
		test(rlist[0]==rect);
		test(region[0]==rect);
		}
	}

void RWindows::Update(const TRegion& aRgn,const TSize& aSize)
	{
	if(aRgn.CheckError())
		UpdateRect(TRect(aSize),aSize);
	else
		for(TInt count=0;count<aRgn.Count();count++)
			UpdateRect(aRgn[count],aSize);
	}

void CDataWrapperBase::LogRegion(const TDesC& aMessage, const TRegion& aRegion)
	{
	INFO_PRINTF2(KLogRegion, &aMessage);
	TInt	indCount = aRegion.Count();
	if ( indCount==0 )
		{
		INFO_PRINTF1(KLogEmpty);
		}
	else
		{
		const TRect*	rect=aRegion.RectangleList();
		for ( TInt index=0; index<indCount; ++index )
			{
			INFO_PRINTF6(KLogRegionsRect, index, rect[index].iTl.iX, rect[index].iTl.iY, rect[index].iBr.iX, rect[index].iBr.iY);
			}
		}
	}

TBool CDataWrapperBase::GetRegionFromConfig(const TDesC& aSectName, const TDesC& aKeyName, TRegion& aResult)
	{
	TBuf<KMaxTestExecuteCommandLength>	tempStore;
	TRect								rect;

	aResult.Clear();
	TBool	moreData=ETrue;
	for ( TInt index=0; moreData; )
		{
		tempStore.Format(KFormatFieldNumber, &aKeyName, ++index);
		moreData=GetRectFromConfig(aSectName, tempStore, rect);
		if ( moreData )
			{
			aResult.AddRect(rect);
			}
		}

	return aResult.Count()>0;
	}

EXPORT_C void CHuiCanvasGc::ClipRegion(const TRegion& aClipRegion)
    {
    if (!iGc)
       {
       return;    
       }

    switch (iClipMode)
        {
        case EHuiCanvasClipModeNormal:
            {
            // If previous clipping region set, cancel it first.
            if (iClippingRegion.Count())
                {
                CancelClipping();    
                }
                
            // Set new region, ignore empty rects if any
            for (TInt i=0; i < aClipRegion.Count(); i++)
                {
                if (!aClipRegion[i].IsEmpty())
                    {
                    iClippingRegion.AddRect(aClipRegion[i]);    
                    }                                        
                }
            
            iClippingRegion.Tidy();
            
            if (iClippingRegion.Count() == 1)
                {
                // If only one rect, then do simple clipping...                    
                iGc->Enable(CHuiGc::EFeatureClipping);
                iGc->PushClip();
                iGc->Clip(iClippingRegion[0]);                
                }
            else if (iClippingRegion.Count() > 1)
                {
                // ...otherewise must do region clipping.
                iGc->Enable(CHuiGc::EFeatureClipping);
                iGc->PushClip();
                if (MaxNumberOfClipRects() > 1)
                    {
                    iGc->Clip(iClippingRegion);                    
                    }
                else
                    {
                    // region clipping is not available, try boundingrect
                    iGc->Clip(iClippingRegion.BoundingRect());                                        
                    }
                }
            else
                {
                // No clip rects set, do nothing here.    
                }                                
            break;
            }
        case EHuiCanvasClipModeDelayed:
            {
            // If previous clipping region set, cancel it first.
            if (iClippingRegion.Count())
                {
                CancelClipping();    
                }
                
            // Set new region, ignore empty rects if any
            for (TInt i=0; i < aClipRegion.Count(); i++)
                {
                if (!aClipRegion[i].IsEmpty())
                    {
                    iClippingRegion.AddRect(aClipRegion[i]);    
                    }                    
                }

            iClippingRegion.Tidy();
            break;    
            }
        case EHuiCanvasClipModeNone:
        default:
            {
            // Do nothing            
            break;    
            }
        }    
    }  

//.........这里部分代码省略.........

    if (IsCachedRenderTargetSupported() && IsCachedRenderTargetPreferred())
        {
        // Background needs to be captured from surface if effect uses background AND 
        // Visual is transparent or margin is enabled AND
        // Background has not been disabled with a effect specific flag
        TBool enableBackground = IsAppliedToBackground() && (!aOpaque || iRoot->IsMarginEnabled()) && !(EffectFlags() & KHuiFxDisableBackground);
        
        if (EffectFlags() & KHuiFxEnableBackgroundInAllLayers)
            {
            enableBackground = ETrue;
            }
        
        TBool useFrozenBackground = (EffectFlags() & KHuiFxFrozenBackground);
        
        // Check if cache is up-to date or does it need to be refreshed
        TBool cachedRenderTargetNeedsRefresh = (iRoot->Changed() || aRefreshCachedRenderTarget || (enableBackground && !useFrozenBackground));
        if (!iCachedRenderTarget || (iCachedRenderTarget && iCachedRenderTarget->Size() !=  iRoot->VisualRect().Size())) 
            {
            cachedRenderTargetNeedsRefresh = ETrue;
            }

        // Try to apply also margins, we cannot just use aDisplayRect directly
        TRect targetRect = iRoot->VisualRect();
        
        // Size is always same as target rect. It contains margins if those are enabled.
        TSize cachedRenderTargetSize = targetRect.Size();        
                
        // Prepare cached offscreen render target
        PrepareCachedRenderTarget(targetRect.iTl, cachedRenderTargetSize, cachedRenderTargetNeedsRefresh, enableBackground);
        
        // If it is available, then lets do it 
        if (iCachedRenderTarget)
            {
            // Disable clipping, otherwise strange things happen.
            aGc.Disable(CHuiGc::EFeatureClipping);             
            if (cachedRenderTargetNeedsRefresh)
                {
                // Render to cached render target
                iRoot->Draw(*iEngine, aGc, *iCachedRenderTarget, *iCachedRenderTarget, aHasSurface);                
#ifdef HUIFX_TRACE    
                RDebug::Print(_L("CHuiFxEffect::CachedDraw - refreshed cached render buffer 0x%x"), this);
#endif
                }            

            if (aClipRegion.Count())
                {
                aGc.Enable(CHuiGc::EFeatureClipping);
                aGc.PushClip();
                aGc.Clip(aClipRegion);
                }
            
            // Write cached buffer to the display
           
	       iEngine->Composite(aGc, *iCachedRenderTarget, targetRect.iTl, aOpaque && !(EffectFlags() & KHuiFxAlwaysBlend), aAlpha);
           

            if (aClipRegion.Count())
                {
                aGc.PopClip();
                }
            
            aGc.Enable(CHuiGc::EFeatureClipping);
#ifdef HUIFX_TRACE    
            RDebug::Print(_L("CHuiFxEffect::CachedDraw - Cached render buffer drawn 0x%x"), this);
            RDebug::Print(_L("CHuiFxEffect::CachedDraw - displayrect: %i,%i, %i,%i "), 
                    aDisplayRect.iTl.iX,
                    aDisplayRect.iTl.iY,
                    aDisplayRect.iBr.iX,
                    aDisplayRect.iBr.iY);
#endif            
            }
        else
            {
            // It might not be available e.g. in low memory situations, just indiacte that we could not draw.
            return EFalse;
            }
        }
    else
        {
        // Release cached render target just in case it is reserved for some reason
        ReleaseCachedRenderTarget();

        // Use default onscreen render target
        if (!target)
            {
            target = iEngine->DefaultRenderbuffer();
            }
        
        if (!target)
            {
            return EFalse;
            }
        
        // Normal drawing
        iRoot->Draw(*iEngine, aGc, *target, *target, aHasSurface);
        }
                
    return ETrue;    
    }