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 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
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 * with the License.  You may obtain a copy of the License at
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// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_drawinglayer.hxx"

#include <vclhelperbufferdevice.hxx>
#include <basegfx/range/b2drange.hxx>
#include <vcl/bitmapex.hxx>
#include <basegfx/matrix/b2dhommatrix.hxx>
#include <tools/stream.hxx>

//////////////////////////////////////////////////////////////////////////////
// support for rendering Bitmap and BitmapEx contents

namespace drawinglayer
{
	impBufferDevice::impBufferDevice(
		OutputDevice& rOutDev, 
		const basegfx::B2DRange& rRange,
		bool bAddOffsetToMapping)
	:	mrOutDev(rOutDev),
		maContent(rOutDev),
		mpMask(0L),
		mpAlpha(0L)
	{
        basegfx::B2DRange aRangePixel(rRange);
        aRangePixel.transform(rOutDev.GetViewTransformation());
        const Rectangle aRectPixel(
			(sal_Int32)floor(aRangePixel.getMinX()), (sal_Int32)floor(aRangePixel.getMinY()), 
			(sal_Int32)ceil(aRangePixel.getMaxX()), (sal_Int32)ceil(aRangePixel.getMaxY()));
		const Point aEmptyPoint;
		maDestPixel = Rectangle(aEmptyPoint, rOutDev.GetOutputSizePixel());
		maDestPixel.Intersection(aRectPixel);

		if(isVisible())
		{
			maContent.SetOutputSizePixel(maDestPixel.GetSize(), false);

            // #i93485# assert when copying from window to VDev is used
            OSL_ENSURE(rOutDev.GetOutDevType() != OUTDEV_WINDOW, 
                "impBufferDevice render helper: Copying from Window to VDev, this should be avoided (!)");

			const bool bWasEnabledSrc(rOutDev.IsMapModeEnabled());
			rOutDev.EnableMapMode(false);
			maContent.DrawOutDev(aEmptyPoint, maDestPixel.GetSize(), maDestPixel.TopLeft(), maDestPixel.GetSize(), rOutDev);
			rOutDev.EnableMapMode(bWasEnabledSrc);

			MapMode aNewMapMode(rOutDev.GetMapMode());

			if(bAddOffsetToMapping)
			{
				const Point aLogicTopLeft(rOutDev.PixelToLogic(maDestPixel.TopLeft()));
				aNewMapMode.SetOrigin(Point(-aLogicTopLeft.X(), -aLogicTopLeft.Y()));
			}

			maContent.SetMapMode(aNewMapMode);

            // copy AA flag for new target
            maContent.SetAntialiasing(mrOutDev.GetAntialiasing());
		}
	}

	impBufferDevice::~impBufferDevice()
	{
		delete mpMask;
		delete mpAlpha;
	}

	void impBufferDevice::paint(double fTrans)
	{
		const Point aEmptyPoint;
		const Size aSizePixel(maContent.GetOutputSizePixel());
		const bool bWasEnabledDst(mrOutDev.IsMapModeEnabled());
    	static bool bDoSaveForVisualControl(false);

		mrOutDev.EnableMapMode(false);
		maContent.EnableMapMode(false);
		Bitmap aContent(maContent.GetBitmap(aEmptyPoint, aSizePixel)); 

		if(bDoSaveForVisualControl)
		{
			SvFileStream aNew((const String&)String(ByteString( "c:\\content.bmp" ), RTL_TEXTENCODING_UTF8), STREAM_WRITE|STREAM_TRUNC);
			aNew << aContent;
		}

        if(mpAlpha)
		{
			mpAlpha->EnableMapMode(false);
			const AlphaMask aAlphaMask(mpAlpha->GetBitmap(aEmptyPoint, aSizePixel));
		    
            if(bDoSaveForVisualControl)
		    {
			    SvFileStream aNew((const String&)String(ByteString( "c:\\transparence.bmp" ), RTL_TEXTENCODING_UTF8), STREAM_WRITE|STREAM_TRUNC);
			    aNew << aAlphaMask.GetBitmap();
		    }
			
            mrOutDev.DrawBitmapEx(maDestPixel.TopLeft(), BitmapEx(aContent, aAlphaMask));
		}
		else if(mpMask)
		{
			mpMask->EnableMapMode(false);
			const Bitmap aMask(mpMask->GetBitmap(aEmptyPoint, aSizePixel)); 

            if(bDoSaveForVisualControl)
		    {
			    SvFileStream aNew((const String&)String(ByteString( "c:\\mask.bmp" ), RTL_TEXTENCODING_UTF8), STREAM_WRITE|STREAM_TRUNC);
			    aNew << aMask;
		    }

            mrOutDev.DrawBitmapEx(maDestPixel.TopLeft(), BitmapEx(aContent, aMask));
		}
		else if(0.0 != fTrans)
		{
			sal_uInt8 nMaskValue((sal_uInt8)basegfx::fround(fTrans * 255.0));
			const AlphaMask aAlphaMask(aSizePixel, &nMaskValue);
			mrOutDev.DrawBitmapEx(maDestPixel.TopLeft(), BitmapEx(aContent, aAlphaMask));
		}
		else
		{
			mrOutDev.DrawBitmap(maDestPixel.TopLeft(), aContent);
		}

		mrOutDev.EnableMapMode(bWasEnabledDst);
	}

	VirtualDevice& impBufferDevice::getMask()
	{ 
		if(!mpMask)
		{
			mpMask = new VirtualDevice(mrOutDev, 1);
			mpMask->SetOutputSizePixel(maDestPixel.GetSize(), true);
			mpMask->SetMapMode(maContent.GetMapMode());

            // do NOT copy AA flag for mask!
		}

		return *mpMask;
	}

	VirtualDevice& impBufferDevice::getTransparence() 
	{ 
		if(!mpAlpha)
		{
			mpAlpha = new VirtualDevice();
			mpAlpha->SetOutputSizePixel(maDestPixel.GetSize(), true);
			mpAlpha->SetMapMode(maContent.GetMapMode());

            // copy AA flag for new target; masking needs to be smooth
            mpAlpha->SetAntialiasing(maContent.GetAntialiasing());
		}

		return *mpAlpha;
	}
} // end of namespace drawinglayer

//////////////////////////////////////////////////////////////////////////////
// eof