/**************************************************************
 * 
 * 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_vcl.hxx"

#include <tools/poly.hxx>

#include <vcl/salbtype.hxx>
#include <vcl/bitmap.hxx>
#include <vcl/region.hxx>
#include <vcl/bmpacc.hxx>

#include <bmpfast.hxx>

// ---------------------
// - BitmapWriteAccess -
// ---------------------

void BitmapWriteAccess::SetLineColor()
{
	delete mpLineColor;
	mpLineColor = NULL;
}

// ------------------------------------------------------------------

void BitmapWriteAccess::SetLineColor( const Color& rColor )
{
	delete mpLineColor;
	
	if( rColor.GetTransparency() == 255 )
		mpLineColor = NULL;
	else
		mpLineColor = ( HasPalette() ? new BitmapColor(  (sal_uInt8) GetBestPaletteIndex( rColor ) ) : new BitmapColor( rColor ) );
}

// ------------------------------------------------------------------

Color BitmapWriteAccess::GetLineColor() const
{
	Color aRet;
	
	if( mpLineColor )
		aRet = (const Color&) *mpLineColor;
	else
		aRet.SetTransparency( 255 );
	
	return aRet;
}

// ------------------------------------------------------------------

void BitmapWriteAccess::SetFillColor()
{
	delete mpFillColor;
	mpFillColor = NULL;
}

// ------------------------------------------------------------------

void BitmapWriteAccess::SetFillColor( const Color& rColor )
{
	delete mpFillColor;
	
	if( rColor.GetTransparency() == 255 )
		mpFillColor = NULL;
	else
		mpFillColor = ( HasPalette() ? new BitmapColor(  (sal_uInt8) GetBestPaletteIndex( rColor ) ) : new BitmapColor( rColor ) );
}

// ------------------------------------------------------------------

Color BitmapWriteAccess::GetFillColor() const
{
	Color aRet;
	
	if( mpFillColor )
		aRet = (const Color&) *mpFillColor;
	else
		aRet.SetTransparency( 255 );

	return aRet;
}

// ------------------------------------------------------------------

void BitmapWriteAccess::Erase( const Color& rColor )
{
    // convert the color format from RGB to palette index if needed
    // TODO: provide and use Erase( BitmapColor& method)
    BitmapColor aColor = rColor;
    if( HasPalette() )
        aColor = BitmapColor( (sal_uInt8)GetBestPaletteIndex( rColor) );
    // try fast bitmap method first
    if( ImplFastEraseBitmap( *mpBuffer, aColor ) )
        return;

    // use the canonical method to clear the bitmap
	BitmapColor*	pOldFillColor = mpFillColor ? new BitmapColor( *mpFillColor ) : NULL;
	const Point		aPoint;	
	const Rectangle	aRect( aPoint, maBitmap.GetSizePixel() );

	SetFillColor( rColor );
	FillRect( aRect );
	delete mpFillColor;
	mpFillColor = pOldFillColor;
}

// ------------------------------------------------------------------

void BitmapWriteAccess::DrawLine( const Point& rStart, const Point& rEnd )
{
	if( mpLineColor )
	{
		const BitmapColor&	rLineColor = *mpLineColor;
		long 				nX, nY;
	
		if ( rStart.X() == rEnd.X() )
		{
			// vertikale Line
			const long nEndY = rEnd.Y();
	
			nX = rStart.X();
			nY = rStart.Y();
			
			if ( nEndY > nY )
			{
				for (; nY <= nEndY; nY++ )
					SetPixel( nY, nX, rLineColor );
			}
			else
			{
				for (; nY >= nEndY; nY-- )
					SetPixel( nY, nX, rLineColor );
			}
		}
		else if ( rStart.Y() == rEnd.Y() )
		{
			// horizontale Line
			const long nEndX = rEnd.X();
			
			nX = rStart.X();
			nY = rStart.Y();
	
			if ( nEndX > nX )
			{
				for (; nX <= nEndX; nX++ )
					SetPixel( nY, nX, rLineColor );
			}
			else
			{
				for (; nX >= nEndX; nX-- )
					SetPixel( nY, nX, rLineColor );
			}
		}
		else
		{
			const long	nDX = labs( rEnd.X() - rStart.X() );
			const long	nDY = labs( rEnd.Y() - rStart.Y() );
			long		nX1;
			long		nY1;
			long		nX2;
			long		nY2;
	
			if ( nDX >= nDY )
			{
				if ( rStart.X() < rEnd.X() )
				{
					nX1 = rStart.X();
					nY1 = rStart.Y();
					nX2 = rEnd.X();
					nY2 = rEnd.Y();
				}
				else
				{
					nX1 = rEnd.X();
					nY1 = rEnd.Y();
					nX2 = rStart.X();
					nY2 = rStart.Y();
				}
	
				const long	nDYX = ( nDY - nDX ) << 1;
				const long	nDY2 = nDY << 1;
				long		nD = nDY2 - nDX;
				sal_Bool		bPos = nY1 < nY2;
	
				for ( nX = nX1, nY = nY1; nX <= nX2; nX++ )
				{
					SetPixel( nY, nX, rLineColor );
	
					if ( nD < 0 )
						nD += nDY2;
					else
					{
						nD += nDYX;
	
						if ( bPos )
							nY++;
						else
							nY--;
					}
				}
			}
			else
			{
				if ( rStart.Y() < rEnd.Y() )
				{
					nX1 = rStart.X();
					nY1 = rStart.Y();
					nX2 = rEnd.X();
					nY2 = rEnd.Y();
				}
				else
				{
					nX1 = rEnd.X();
					nY1 = rEnd.Y();
					nX2 = rStart.X();
					nY2 = rStart.Y();
				}
	
				const long	nDYX = ( nDX - nDY ) << 1;
				const long	nDY2 = nDX << 1;
				long		nD = nDY2 - nDY;
				sal_Bool		bPos = nX1 < nX2;
	
				for ( nX = nX1, nY = nY1; nY <= nY2; nY++ )
				{
					SetPixel( nY, nX, rLineColor );
	
					if ( nD < 0 )
						nD += nDY2;
					else
					{
						nD += nDYX;
	
						if ( bPos )
							nX++;
						else
							nX--;
					}
				}
			}
		}
	}
}

// ------------------------------------------------------------------

void BitmapWriteAccess::FillRect( const Rectangle& rRect )
{
	if( mpFillColor )
	{
		const BitmapColor&	rFillColor = *mpFillColor;
		Point 				aPoint;	
		Rectangle			aRect( aPoint, maBitmap.GetSizePixel() );

		aRect.Intersection( rRect );

		if( !aRect.IsEmpty() )
		{
			const long	nStartX = rRect.Left();
			const long	nStartY = rRect.Top();
			const long	nEndX = rRect.Right();
			const long	nEndY = rRect.Bottom();
	
			for( long nY = nStartY; nY <= nEndY; nY++ )
				for( long nX = nStartX; nX <= nEndX; nX++ )
					SetPixel( nY, nX, rFillColor );
		}
	}
}

// ------------------------------------------------------------------

void BitmapWriteAccess::DrawRect( const Rectangle& rRect )
{
	if( mpFillColor )
		FillRect( rRect );
	
	if( mpLineColor && ( !mpFillColor || ( *mpFillColor != *mpLineColor ) ) )
	{
		DrawLine( rRect.TopLeft(), rRect.TopRight() );
		DrawLine( rRect.TopRight(), rRect.BottomRight() );
		DrawLine( rRect.BottomRight(), rRect.BottomLeft() );
		DrawLine( rRect.BottomLeft(), rRect.TopLeft() );
	}
}

// ------------------------------------------------------------------

void BitmapWriteAccess::FillPolygon( const Polygon& rPoly )
{
	const sal_uInt16 nSize = rPoly.GetSize();

	if( nSize && mpFillColor )
	{
		const BitmapColor&	rFillColor = *mpFillColor;
		Region				aRegion( rPoly );
//		Rectangle			aRect;

		aRegion.Intersect( Rectangle( Point(), Size( Width(), Height() ) ) );

		if( !aRegion.IsEmpty() )
		{
            RectangleVector aRectangles;
            aRegion.GetRegionRectangles(aRectangles);

            for(RectangleVector::const_iterator aRectIter(aRectangles.begin()); aRectIter != aRectangles.end(); aRectIter++)
            {
                for(long nY = aRectIter->Top(), nEndY = aRectIter->Bottom(); nY <= nEndY; nY++)
                {
                    for(long nX = aRectIter->Left(), nEndX = aRectIter->Right(); nX <= nEndX; nX++)
                    {
                        SetPixel(nY, nX, rFillColor);
                    }
                }
            }

			//RegionHandle aRegHandle( aRegion.BeginEnumRects() );
            //
			//while( aRegion.GetEnumRects( aRegHandle, aRect ) )
			//	for( long nY = aRect.Top(), nEndY = aRect.Bottom(); nY <= nEndY; nY++ )
			//		for( long nX = aRect.Left(), nEndX = aRect.Right(); nX <= nEndX; nX++ )
			//			SetPixel( nY, nX, rFillColor );
            //
			//aRegion.EndEnumRects( aRegHandle );
		}
	}
}

// ------------------------------------------------------------------

void BitmapWriteAccess::DrawPolygon( const Polygon& rPoly )
{
	if( mpFillColor )
		FillPolygon( rPoly );

	if( mpLineColor && ( !mpFillColor || ( *mpFillColor != *mpLineColor ) ) )
	{
		const sal_uInt16 nSize = rPoly.GetSize();

		for( sal_uInt16 i = 0, nSize1 = nSize - 1; i < nSize1; i++ )
			DrawLine( rPoly[ i ], rPoly[ i + 1 ] );

		if( rPoly[ nSize - 1 ] != rPoly[ 0 ] )
			DrawLine( rPoly[ nSize - 1 ], rPoly[ 0 ] );
	}
}

// ------------------------------------------------------------------

void BitmapWriteAccess::FillPolyPolygon( const PolyPolygon& rPolyPoly )
{
	const sal_uInt16 nCount = rPolyPoly.Count();

	if( nCount && mpFillColor )
	{
		const BitmapColor&	rFillColor = *mpFillColor;
		Region				aRegion( rPolyPoly );
		//Rectangle			aRect;

		aRegion.Intersect( Rectangle( Point(), Size( Width(), Height() ) ) );

		if( !aRegion.IsEmpty() )
		{
            RectangleVector aRectangles;
            aRegion.GetRegionRectangles(aRectangles);

            for(RectangleVector::const_iterator aRectIter(aRectangles.begin()); aRectIter != aRectangles.end(); aRectIter++)
            {
                for(long nY = aRectIter->Top(), nEndY = aRectIter->Bottom(); nY <= nEndY; nY++)
                {
                    for(long nX = aRectIter->Left(), nEndX = aRectIter->Right(); nX <= nEndX; nX++)
                    {
                        SetPixel(nY, nX, rFillColor);
                    }
                }
            }

            //RegionHandle aRegHandle( aRegion.BeginEnumRects() );
			//
			//while( aRegion.GetEnumRects( aRegHandle, aRect ) )
			//	for( long nY = aRect.Top(), nEndY = aRect.Bottom(); nY <= nEndY; nY++ )
			//		for( long nX = aRect.Left(), nEndX = aRect.Right(); nX <= nEndX; nX++ )
			//			SetPixel( nY, nX, rFillColor );
            //
			//aRegion.EndEnumRects( aRegHandle );
		}
	}
}

// ------------------------------------------------------------------

void BitmapWriteAccess::DrawPolyPolygon( const PolyPolygon& rPolyPoly )
{
	if( mpFillColor )
		FillPolyPolygon( rPolyPoly );
	
	if( mpLineColor && ( !mpFillColor || ( *mpFillColor != *mpLineColor ) ) )
	{
		for( sal_uInt16 n = 0, nCount = rPolyPoly.Count(); n < nCount; )
		{
			const Polygon&	rPoly = rPolyPoly[ n++ ];
			const sal_uInt16	nSize = rPoly.GetSize();

			if( nSize )
			{
				for( sal_uInt16 i = 0, nSize1 = nSize - 1; i < nSize1; i++ )
					DrawLine( rPoly[ i ], rPoly[ i + 1 ] );

				if( rPoly[ nSize - 1 ] != rPoly[ 0 ] )
					DrawLine( rPoly[ nSize - 1 ], rPoly[ 0 ] );
			}
		}
	}
}