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 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
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 *************************************************************/



// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_svx.hxx"
#include <svx/sdrpaintwindow.hxx>
#include <svx/sdr/overlay/overlaymanagerbuffered.hxx>
#include <svx/svdpntv.hxx>
#include <vcl/gdimtf.hxx>
#include <vcl/svapp.hxx>

////////////////////////////////////////////////////////////////////////////////////////////////////

SdrPreRenderDevice::SdrPreRenderDevice(OutputDevice& rOriginal)
:	mrOutputDevice(rOriginal)
{
}

SdrPreRenderDevice::~SdrPreRenderDevice()
{
}

void SdrPreRenderDevice::PreparePreRenderDevice()
{
	// compare size of maPreRenderDevice with size of visible area
	if(maPreRenderDevice.GetOutputSizePixel() != mrOutputDevice.GetOutputSizePixel())
	{
		maPreRenderDevice.SetOutputSizePixel(mrOutputDevice.GetOutputSizePixel());
	}

	// Also compare the MapModes for zoom/scroll changes
	if(maPreRenderDevice.GetMapMode() != mrOutputDevice.GetMapMode())
	{
		maPreRenderDevice.SetMapMode(mrOutputDevice.GetMapMode());
	}

	// #i29186#
	maPreRenderDevice.SetDrawMode(mrOutputDevice.GetDrawMode());
	maPreRenderDevice.SetSettings(mrOutputDevice.GetSettings());
}

void SdrPreRenderDevice::OutputPreRenderDevice(const Region& rExpandedRegion)
{
	// region to pixels
	Region aRegionPixel(mrOutputDevice.LogicToPixel(rExpandedRegion));
	RegionHandle aRegionHandle(aRegionPixel.BeginEnumRects());
	Rectangle aRegionRectanglePixel;

	// MapModes off
	sal_Bool bMapModeWasEnabledDest(mrOutputDevice.IsMapModeEnabled());
	sal_Bool bMapModeWasEnabledSource(maPreRenderDevice.IsMapModeEnabled());
	mrOutputDevice.EnableMapMode(sal_False);
	maPreRenderDevice.EnableMapMode(sal_False);

	while(aRegionPixel.GetEnumRects(aRegionHandle, aRegionRectanglePixel))
	{
		// for each rectangle, copy the area
		const Point aTopLeft(aRegionRectanglePixel.TopLeft());
		const Size aSize(aRegionRectanglePixel.GetSize());

		mrOutputDevice.DrawOutDev(
			aTopLeft, aSize, 
			aTopLeft, aSize, 
			maPreRenderDevice);

#ifdef DBG_UTIL
		// #i74769#
		static bool bDoPaintForVisualControlRegion(false);
		if(bDoPaintForVisualControlRegion)
		{
			Color aColor((((((rand()&0x7f)|0x80)<<8L)|((rand()&0x7f)|0x80))<<8L)|((rand()&0x7f)|0x80));
			mrOutputDevice.SetLineColor(aColor);
			mrOutputDevice.SetFillColor();
			mrOutputDevice.DrawRect(aRegionRectanglePixel);
		}
#endif
	}

	aRegionPixel.EndEnumRects(aRegionHandle);

	mrOutputDevice.EnableMapMode(bMapModeWasEnabledDest);
	maPreRenderDevice.EnableMapMode(bMapModeWasEnabledSource);
}

////////////////////////////////////////////////////////////////////////////////////////////////////

void SdrPaintWindow::impCreateOverlayManager(const bool bUseBuffer)
{
    // When the buffer usage has changed then we have to create a new
    // overlay manager.  Save the current one so that later we can move its
    // overlay objects to the new one.
    sdr::overlay::OverlayManager* pOldOverlayManager = NULL;
    
	if(mbUseBuffer != bUseBuffer)
    {
        mbUseBuffer = bUseBuffer;
        pOldOverlayManager = mpOverlayManager;
        mpOverlayManager = NULL;
    }

	// not yet one created?
	if(!mpOverlayManager)
	{
		// is it a window?
		if(OUTDEV_WINDOW == GetOutputDevice().GetOutDevType())
		{
			// decide which OverlayManager to use
			if(GetPaintView().IsBufferedOverlayAllowed() && mbUseBuffer)
			{
				// buffered OverlayManager, buffers it's background and refreshes from there
				// for pure overlay changes (no system redraw). The 3rd parameter specifies
				// if that refresh itself will use a 2nd vdev to avoid flickering.
				// Also hand over the evtl. existing old OverlayManager; this means to take over 
				// the registered OverlayObjects from it
				mpOverlayManager = new ::sdr::overlay::OverlayManagerBuffered(GetOutputDevice(), pOldOverlayManager, true);
			}
			else
			{
				// unbuffered OverlayManager, just invalidates places where changes
				// take place
				// Also hand over the evtl. existing old OverlayManager; this means to take over 
				// the registered OverlayObjects from it
				mpOverlayManager = new ::sdr::overlay::OverlayManager(GetOutputDevice(), pOldOverlayManager);
			}

			OSL_ENSURE(mpOverlayManager, "SdrPaintWindow::SdrPaintWindow: Could not allocate an overlayManager (!)");

            // Request a repaint so that the buffered overlay manager fills
            // its buffer properly.  This is a workaround for missing buffer
            // updates.
            Window* pWindow = dynamic_cast<Window*>(&GetOutputDevice());
            if (pWindow != NULL)
                pWindow->Invalidate();

			Color aColA(GetPaintView().getOptionsDrawinglayer().GetStripeColorA());
			Color aColB(GetPaintView().getOptionsDrawinglayer().GetStripeColorB());

			if(Application::GetSettings().GetStyleSettings().GetHighContrastMode())
			{
				aColA = aColB = Application::GetSettings().GetStyleSettings().GetHighlightColor();
				aColB.Invert();
			}

			mpOverlayManager->setStripeColorA(aColA);
			mpOverlayManager->setStripeColorB(aColB);
			mpOverlayManager->setStripeLengthPixel(GetPaintView().getOptionsDrawinglayer().GetStripeLength());
		}
	}

	// OverlayObjects are transfered for the evtl. newly created OverlayManager by handing over
	// at construction time
	if(pOldOverlayManager)
    {
        // The old overlay manager is not used anymore and can be (has to be) deleted.
        delete pOldOverlayManager;
    }
}

SdrPaintWindow::SdrPaintWindow(SdrPaintView& rNewPaintView, OutputDevice& rOut)
:	mrOutputDevice(rOut),
	mrPaintView(rNewPaintView),
	mpOverlayManager(0L),
	mpPreRenderDevice(0L),
	mbTemporaryTarget(false), // #i72889#
    mbUseBuffer(true)
{
}

SdrPaintWindow::~SdrPaintWindow()
{
	if(mpOverlayManager)
	{
		delete mpOverlayManager;
		mpOverlayManager = 0L;
	}

	DestroyPreRenderDevice();
}

::sdr::overlay::OverlayManager* SdrPaintWindow::GetOverlayManager() const 
{ 
	if(!mpOverlayManager)
	{
        // Create buffered overlay manager by default.
		const_cast< SdrPaintWindow* >(this)->impCreateOverlayManager(true);
	}

	return mpOverlayManager;
}

Rectangle SdrPaintWindow::GetVisibleArea() const
{
	Size aVisSizePixel(GetOutputDevice().GetOutputSizePixel());
	return Rectangle(GetOutputDevice().PixelToLogic(Rectangle(Point(0,0), aVisSizePixel)));
}

sal_Bool SdrPaintWindow::OutputToRecordingMetaFile() const
{
	GDIMetaFile* pMetaFile = mrOutputDevice.GetConnectMetaFile();
	return (pMetaFile && pMetaFile->IsRecord() && !pMetaFile->IsPause());
}

void SdrPaintWindow::PreparePreRenderDevice()
{
	const sal_Bool bPrepareBufferedOutput(
		mrPaintView.IsBufferedOutputAllowed()
		&& !OutputToPrinter()
		&& !OutputToVirtualDevice()
		&& !OutputToRecordingMetaFile());

	if(bPrepareBufferedOutput)
	{
		if(!mpPreRenderDevice)
		{
			mpPreRenderDevice = new SdrPreRenderDevice(mrOutputDevice);
		}
	}
	else
	{
		DestroyPreRenderDevice();
	}

	if(mpPreRenderDevice)
	{
		mpPreRenderDevice->PreparePreRenderDevice();
	}
}

void SdrPaintWindow::DestroyPreRenderDevice()
{
	if(mpPreRenderDevice)
	{
		delete mpPreRenderDevice;
		mpPreRenderDevice = 0L;
	}
}

void SdrPaintWindow::OutputPreRenderDevice(const Region& rExpandedRegion)
{
	if(mpPreRenderDevice)
	{
		mpPreRenderDevice->OutputPreRenderDevice(rExpandedRegion);
	}
}

// #i73602# add flag if buffer shall be used
void SdrPaintWindow::DrawOverlay(const Region& rRegion, bool bUseBuffer)
{
	// ## force creation of OverlayManager since the first repaint needs to
	// save the background to get a controlled start into overlay mechanism
	impCreateOverlayManager(bUseBuffer);

	if(mpOverlayManager && !OutputToPrinter())
	{
		if(mpPreRenderDevice && bUseBuffer)
		{
			mpOverlayManager->completeRedraw(rRegion, &mpPreRenderDevice->GetPreRenderDevice());
		}
		else
		{
			mpOverlayManager->completeRedraw(rRegion);
		}
	}
}

void SdrPaintWindow::HideOverlay(const Region& rRegion)
{
	if(mpOverlayManager && !OutputToPrinter())
	{
		if(!mpPreRenderDevice)
		{
			mpOverlayManager->restoreBackground(rRegion);
		}
	}
}

const Region& SdrPaintWindow::GetRedrawRegion() const 
{ 
	return maRedrawRegion; 
}

void SdrPaintWindow::SetRedrawRegion(const Region& rNew) 
{ 
	maRedrawRegion = rNew; 
}

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