/**************************************************************
 * 
 * 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.
 * 
 *************************************************************/



// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_svx.hxx"
#include <svx/rectenum.hxx>
#include <vcl/svapp.hxx>
#include <vcl/outdev.hxx>
#include <vcl/bitmap.hxx>

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

void ImpCalcBmpFillSizes( Size&			   rStartOffset,
                          Size&			   rBmpOutputSize,
                          const Rectangle& rOutputRect,
                          const MapMode&   rOutputMapMode,
                          const Bitmap&    rFillBitmap,
                          const Size&      rBmpSize,
                          const Size&      rBmpPerCent,
                          const Size&	   rBmpOffPerCent,
                          sal_Bool             bBmpLogSize,
                          sal_Bool             bBmpTile,
                          sal_Bool             bBmpStretch,
                          RECT_POINT       eBmpRectPoint )
{
	sal_Bool	bOriginalSize = sal_False, bScaleSize = sal_False;

	// Falls keine Groessen gegeben sind ( z.B. alte Dokumente )
	// berechnen wir uns die Groesse selber aus der Bitmap
	// ==> altes Verhalten;
	// wenn nur eine Groesse gegeben ist, wird die andere
	// Groesse angepasst berechnet
	if( bBmpLogSize )
	{
		if( !rBmpSize.Width() && !rBmpSize.Height() )
			bOriginalSize = sal_True;
		else if( !rBmpSize.Width() || !rBmpSize.Height() )
			bScaleSize = sal_True;
	}
	else
	{
		if( !rBmpPerCent.Width() && !rBmpPerCent.Height() )
			bOriginalSize = sal_True;
		else if( !rBmpPerCent.Width() || !rBmpPerCent.Height() )
			bScaleSize = sal_True;
	}

	// entweder Originalgroesse oder angepasste Groesse
	if( bOriginalSize || bScaleSize )
	{
		MapMode aBmpPrefMapMode( rFillBitmap.GetPrefMapMode() );
		Size    aBmpPrefSize( rFillBitmap.GetPrefSize() );

		// Falls keine gesetzt ist, nehmen wir Pixel
		if( !aBmpPrefSize.Width() || !aBmpPrefSize.Height() )
        {
			aBmpPrefSize = rFillBitmap.GetSizePixel();
            aBmpPrefMapMode = MAP_PIXEL;
        }

		if( bOriginalSize )
		{
			if( MAP_PIXEL == aBmpPrefMapMode.GetMapUnit() )
				rBmpOutputSize = Application::GetDefaultDevice()->PixelToLogic( aBmpPrefSize, rOutputMapMode );
			else
				rBmpOutputSize = OutputDevice::LogicToLogic( aBmpPrefSize, aBmpPrefMapMode, rOutputMapMode );
		}
		else
		{
			if( bBmpLogSize )
			{
				rBmpOutputSize = rBmpSize;

				if( !rBmpSize.Width() )
					rBmpOutputSize.Width() = basegfx::fround( (double) rBmpSize.Height() * aBmpPrefSize.Width() / aBmpPrefSize.Height() );
				else
					rBmpOutputSize.Height() = basegfx::fround( (double) rBmpSize.Width() * aBmpPrefSize.Height() / aBmpPrefSize.Width() );
			}
			else
			{
				if( !rBmpPerCent.Width() )
				{
					rBmpOutputSize.Height() = basegfx::fround( (double) rOutputRect.GetHeight() * rBmpPerCent.Height() / 100. );
					rBmpOutputSize.Width() = basegfx::fround( (double) rBmpOutputSize.Height() * aBmpPrefSize.Width() / aBmpPrefSize.Height() );
				}
				else
				{
					rBmpOutputSize.Width() = basegfx::fround( (double) rOutputRect.GetWidth() * rBmpPerCent.Width() / 100. );
					rBmpOutputSize.Height() = basegfx::fround( (double) rBmpOutputSize.Width() * aBmpPrefSize.Height() / aBmpPrefSize.Width() );
				}
			}
		}
	}
	// ansonsten koennen wir die Groesse leicht selber berechnen
	else
	{
		if( bBmpLogSize )
			rBmpOutputSize = rBmpSize;
		else
		{
			rBmpOutputSize.Width() = basegfx::fround( (double) rOutputRect.GetWidth() * rBmpPerCent.Width() / 100. );
			rBmpOutputSize.Height() = basegfx::fround( (double) rOutputRect.GetHeight() * rBmpPerCent.Height() / 100. );
		}
	}

	// nur bei Kachelung die anderen Positionen berechnen
	if( bBmpTile )
	{
        Point aStartPoint;

		// Grundposition der ersten Kachel berechen;
		// Diese Position wird spaeter zur Berechnung der absoluten
		// Startposition links oberhalb des Objektes benutzt
		switch( eBmpRectPoint )
		{
			case( RP_MT ):
			{
				aStartPoint.X() = rOutputRect.Left() + ( ( rOutputRect.GetWidth() - rBmpOutputSize.Width() ) >> 1 );
				aStartPoint.Y() = rOutputRect.Top();
			}
			break;

			case( RP_RT ):
			{
				aStartPoint.X() = rOutputRect.Right() - rBmpOutputSize.Width();
				aStartPoint.Y() = rOutputRect.Top();
			}
			break;

			case( RP_LM ):
			{
				aStartPoint.X() = rOutputRect.Left();
				aStartPoint.Y() = rOutputRect.Top() + ( ( rOutputRect.GetHeight() - rBmpOutputSize.Height() ) >> 1  );
			}
			break;

			case( RP_MM ):
			{
				aStartPoint.X() = rOutputRect.Left() + ( ( rOutputRect.GetWidth() - rBmpOutputSize.Width() ) >> 1 );
				aStartPoint.Y() = rOutputRect.Top() + ( ( rOutputRect.GetHeight() - rBmpOutputSize.Height() ) >> 1 );
			}
			break;

			case( RP_RM ):
			{
				aStartPoint.X() = rOutputRect.Right() - rBmpOutputSize.Width();
				aStartPoint.Y() = rOutputRect.Top() + ( ( rOutputRect.GetHeight() - rBmpOutputSize.Height() ) >> 1 );
			}
			break;

			case( RP_LB ):
			{
				aStartPoint.X() = rOutputRect.Left();
				aStartPoint.Y() = rOutputRect.Bottom() - rBmpOutputSize.Height();
			}
			break;

			case( RP_MB ):
			{
				aStartPoint.X() = rOutputRect.Left() + ( ( rOutputRect.GetWidth() - rBmpOutputSize.Width() ) >> 1 );
				aStartPoint.Y() = rOutputRect.Bottom() - rBmpOutputSize.Height();
			}
			break;

			case( RP_RB ):
			{
				aStartPoint.X() = rOutputRect.Right() - rBmpOutputSize.Width();
				aStartPoint.Y() = rOutputRect.Bottom() - rBmpOutputSize.Height();
			}
			break;

			// default linke obere Ecke
			default:
				aStartPoint = rOutputRect.TopLeft();
			break;
		}

		// X- oder Y-Positionsoffset beruecksichtigen
		if( rBmpOffPerCent.Width() )
			aStartPoint.X() += ( rBmpOutputSize.Width() * rBmpOffPerCent.Width() / 100 );

        if( rBmpOffPerCent.Height() )
			aStartPoint.Y() += ( rBmpOutputSize.Height() * rBmpOffPerCent.Height() / 100 );

		// echten Startpunkt berechnen ( links oben )
		if( rBmpOutputSize.Width() && rBmpOutputSize.Height() )
		{
			const long nDiffX = aStartPoint.X() - rOutputRect.Left();
			const long nDiffY = aStartPoint.Y() - rOutputRect.Top();

			if ( nDiffX )
			{
				long nCount = nDiffX / rBmpOutputSize.Width() + 1;

				if ( rBmpOffPerCent.Height() && ( nCount & 1L ) )
					nCount++;

				aStartPoint.X() -= ( nCount * rBmpOutputSize.Width() );
			}

			if ( nDiffY )
			{
				long nCount = nDiffY / rBmpOutputSize.Height() + 1;

				if ( rBmpOffPerCent.Width() && ( nCount & 1L ) )
					nCount++;

				aStartPoint.Y() -= ( nCount * rBmpOutputSize.Height() );
			}
		}

        rStartOffset = Size( aStartPoint.X() - rOutputRect.Left(),
                             aStartPoint.Y() - rOutputRect.Top() );
	}
    else
    {
        if( bBmpStretch )
        {
            rStartOffset = Size(0, 0);
            rBmpOutputSize = rOutputRect.GetSize();
        }
        else
        {
            rStartOffset = Size( ( rOutputRect.GetWidth() - rBmpOutputSize.Width() ) >> 1,
                                 ( rOutputRect.GetHeight() - rBmpOutputSize.Height() ) >> 1 );
        }
    }
}

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