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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
#include <vclhelperbitmaptransform.hxx>
#include <vcl/bmpacc.hxx>
#include <basegfx/point/b2dpoint.hxx>
#include <basegfx/color/bcolormodifier.hxx>
//////////////////////////////////////////////////////////////////////////////
// support for rendering Bitmap and BitmapEx contents
namespace drawinglayer
{
namespace
{
void impSmoothPoint(BitmapColor& rValue, const basegfx::B2DPoint& rSource, sal_Int32 nIntX, sal_Int32 nIntY, BitmapReadAccess& rRead)
{
double fDeltaX(rSource.getX() - nIntX);
double fDeltaY(rSource.getY() - nIntY);
sal_Int32 nIndX(0L);
sal_Int32 nIndY(0L);
if(fDeltaX > 0.0 && nIntX + 1L < rRead.Width())
{
nIndX++;
}
else if(fDeltaX < 0.0 && nIntX >= 1L)
{
fDeltaX = -fDeltaX;
nIndX--;
}
if(fDeltaY > 0.0 && nIntY + 1L < rRead.Height())
{
nIndY++;
}
else if(fDeltaY < 0.0 && nIntY >= 1L)
{
fDeltaY = -fDeltaY;
nIndY--;
}
if(nIndX || nIndY)
{
const double fColorToReal(1.0 / 255.0);
double fR(rValue.GetRed() * fColorToReal);
double fG(rValue.GetGreen() * fColorToReal);
double fB(rValue.GetBlue() * fColorToReal);
double fRBottom(0.0), fGBottom(0.0), fBBottom(0.0);
if(nIndX)
{
const double fMulA(fDeltaX * fColorToReal);
double fMulB(1.0 - fDeltaX);
const BitmapColor aTopPartner(rRead.GetColor(nIntY, nIntX + nIndX));
fR = (fR * fMulB) + (aTopPartner.GetRed() * fMulA);
fG = (fG * fMulB) + (aTopPartner.GetGreen() * fMulA);
fB = (fB * fMulB) + (aTopPartner.GetBlue() * fMulA);
if(nIndY)
{
fMulB *= fColorToReal;
const BitmapColor aBottom(rRead.GetColor(nIntY + nIndY, nIntX));
const BitmapColor aBottomPartner(rRead.GetColor(nIntY + nIndY, nIntX + nIndX));
fRBottom = (aBottom.GetRed() * fMulB) + (aBottomPartner.GetRed() * fMulA);
fGBottom = (aBottom.GetGreen() * fMulB) + (aBottomPartner.GetGreen() * fMulA);
fBBottom = (aBottom.GetBlue() * fMulB) + (aBottomPartner.GetBlue() * fMulA);
}
}
if(nIndY)
{
if(!nIndX)
{
const BitmapColor aBottom(rRead.GetColor(nIntY + nIndY, nIntX));
fRBottom = aBottom.GetRed() * fColorToReal;
fGBottom = aBottom.GetGreen() * fColorToReal;
fBBottom = aBottom.GetBlue() * fColorToReal;
}
const double fMulB(1.0 - fDeltaY);
fR = (fR * fMulB) + (fRBottom * fDeltaY);
fG = (fG * fMulB) + (fGBottom * fDeltaY);
fB = (fB * fMulB) + (fBBottom * fDeltaY);
}
rValue.SetRed((sal_uInt8)(fR * 255.0));
rValue.SetGreen((sal_uInt8)(fG * 255.0));
rValue.SetBlue((sal_uInt8)(fB * 255.0));
}
}
void impSmoothIndex(BitmapColor& rValue, const basegfx::B2DPoint& rSource, sal_Int32 nIntX, sal_Int32 nIntY, BitmapReadAccess& rRead)
{
double fDeltaX(rSource.getX() - nIntX);
double fDeltaY(rSource.getY() - nIntY);
sal_Int32 nIndX(0L);
sal_Int32 nIndY(0L);
if(fDeltaX > 0.0 && nIntX + 1L < rRead.Width())
{
nIndX++;
}
else if(fDeltaX < 0.0 && nIntX >= 1L)
{
fDeltaX = -fDeltaX;
nIndX--;
}
if(fDeltaY > 0.0 && nIntY + 1L < rRead.Height())
{
nIndY++;
}
else if(fDeltaY < 0.0 && nIntY >= 1L)
{
fDeltaY = -fDeltaY;
nIndY--;
}
if(nIndX || nIndY)
{
const double fColorToReal(1.0 / 255.0);
double fVal(rValue.GetIndex() * fColorToReal);
double fValBottom(0.0);
if(nIndX)
{
const double fMulA(fDeltaX * fColorToReal);
double fMulB(1.0 - fDeltaX);
const BitmapColor aTopPartner(rRead.GetPixel(nIntY, nIntX + nIndX));
fVal = (fVal * fMulB) + (aTopPartner.GetIndex() * fMulA);
if(nIndY)
{
fMulB *= fColorToReal;
const BitmapColor aBottom(rRead.GetPixel(nIntY + nIndY, nIntX));
const BitmapColor aBottomPartner(rRead.GetPixel(nIntY + nIndY, nIntX + nIndX));
fValBottom = (aBottom.GetIndex() * fMulB) + (aBottomPartner.GetIndex() * fMulA);
}
}
if(nIndY)
{
if(!nIndX)
{
const BitmapColor aBottom(rRead.GetPixel(nIntY + nIndY, nIntX));
fValBottom = aBottom.GetIndex() * fColorToReal;
}
const double fMulB(1.0 - fDeltaY);
fVal = (fVal * fMulB) + (fValBottom * fDeltaY);
}
rValue.SetIndex((sal_uInt8)(fVal * 255.0));
}
}
void impTransformBitmap(const Bitmap& rSource, Bitmap& rDestination, const basegfx::B2DHomMatrix& rTransform, bool bSmooth)
{
BitmapWriteAccess* pWrite = rDestination.AcquireWriteAccess();
if(pWrite)
{
const Size aContentSizePixel(rSource.GetSizePixel());
BitmapReadAccess* pRead = (const_cast< Bitmap& >(rSource)).AcquireReadAccess();
if(pRead)
{
const Size aDestinationSizePixel(rDestination.GetSizePixel());
bool bWorkWithIndex(rDestination.GetBitCount() <= 8);
BitmapColor aOutside(pRead->GetBestMatchingColor(BitmapColor(0xff, 0xff, 0xff)));
for(sal_Int32 y(0L); y < aDestinationSizePixel.getHeight(); y++)
{
for(sal_Int32 x(0L); x < aDestinationSizePixel.getWidth(); x++)
{
const basegfx::B2DPoint aSourceCoor(rTransform * basegfx::B2DPoint(x, y));
const sal_Int32 nIntX(basegfx::fround(aSourceCoor.getX()));
if(nIntX >= 0L && nIntX < aContentSizePixel.getWidth())
{
const sal_Int32 nIntY(basegfx::fround(aSourceCoor.getY()));
if(nIntY >= 0L && nIntY < aContentSizePixel.getHeight())
{
if(bWorkWithIndex)
{
BitmapColor aValue(pRead->GetPixel(nIntY, nIntX));
if(bSmooth)
{
impSmoothIndex(aValue, aSourceCoor, nIntX, nIntY, *pRead);
}
pWrite->SetPixel(y, x, aValue);
}
else
{
BitmapColor aValue(pRead->GetColor(nIntY, nIntX));
if(bSmooth)
{
impSmoothPoint(aValue, aSourceCoor, nIntX, nIntY, *pRead);
}
pWrite->SetPixel(y, x, aValue.IsIndex() ? aValue : pWrite->GetBestMatchingColor(aValue));
}
continue;
}
}
// here are outside pixels. Complete mask
if(bWorkWithIndex)
{
pWrite->SetPixel(y, x, aOutside);
}
}
}
delete pRead;
}
delete pWrite;
}
}
Bitmap impCreateEmptyBitmapWithPattern(const Bitmap& rSource, const Size& aTargetSizePixel)
{
Bitmap aRetval;
BitmapReadAccess* pReadAccess = (const_cast< Bitmap& >(rSource)).AcquireReadAccess();
if(pReadAccess)
{
if(rSource.GetBitCount() <= 8)
{
BitmapPalette aPalette(pReadAccess->GetPalette());
aRetval = Bitmap(aTargetSizePixel, rSource.GetBitCount(), &aPalette);
}
else
{
aRetval = Bitmap(aTargetSizePixel, rSource.GetBitCount());
}
delete pReadAccess;
}
return aRetval;
}
} // end of anonymous namespace
} // end of namespace drawinglayer
namespace drawinglayer
{
BitmapEx impTransformBitmapEx(
const BitmapEx& rSource,
const Rectangle& rCroppedRectPixel,
const basegfx::B2DHomMatrix& rTransform)
{
// force destination to 24 bit, we want to smooth output
const Size aDestinationSize(rCroppedRectPixel.GetSize());
Bitmap aDestination(impCreateEmptyBitmapWithPattern(rSource.GetBitmap(), aDestinationSize));
static bool bDoSmoothAtAll(true);
impTransformBitmap(rSource.GetBitmap(), aDestination, rTransform, bDoSmoothAtAll);
// create mask
if(rSource.IsTransparent())
{
if(rSource.IsAlpha())
{
Bitmap aAlpha(impCreateEmptyBitmapWithPattern(rSource.GetAlpha().GetBitmap(), aDestinationSize));
impTransformBitmap(rSource.GetAlpha().GetBitmap(), aAlpha, rTransform, bDoSmoothAtAll);
return BitmapEx(aDestination, AlphaMask(aAlpha));
}
else
{
Bitmap aMask(impCreateEmptyBitmapWithPattern(rSource.GetMask(), aDestinationSize));
impTransformBitmap(rSource.GetMask(), aMask, rTransform, false);
return BitmapEx(aDestination, aMask);
}
}
return BitmapEx(aDestination);
}
BitmapEx impModifyBitmapEx(
const basegfx::BColorModifierStack& rBColorModifierStack,
const BitmapEx& rSource)
{
Bitmap aChangedBitmap(rSource.GetBitmap());
bool bDone(false);
for(sal_uInt32 a(rBColorModifierStack.count()); a && !bDone; )
{
const basegfx::BColorModifier& rModifier = rBColorModifierStack.getBColorModifier(--a);
switch(rModifier.getMode())
{
case basegfx::BCOLORMODIFYMODE_REPLACE :
{
// complete replace
if(rSource.IsTransparent())
{
// clear bitmap with dest color
if(aChangedBitmap.GetBitCount() <= 8)
{
// do NOT use erase; for e.g. 8bit Bitmaps, the nearest color to the given
// erase color is determined and used -> this may be different from what is
// wanted here. Better create a new bitmap with the needed color explicitly
BitmapReadAccess* pReadAccess = aChangedBitmap.AcquireReadAccess();
OSL_ENSURE(pReadAccess, "Got no Bitmap ReadAccess ?!?");
if(pReadAccess)
{
BitmapPalette aNewPalette(pReadAccess->GetPalette());
aNewPalette[0] = BitmapColor(Color(rModifier.getBColor()));
aChangedBitmap = Bitmap(
aChangedBitmap.GetSizePixel(),
aChangedBitmap.GetBitCount(),
&aNewPalette);
delete pReadAccess;
}
}
else
{
aChangedBitmap.Erase(Color(rModifier.getBColor()));
}
}
else
{
// erase bitmap, caller will know to paint direct
aChangedBitmap.SetEmpty();
}
bDone = true;
break;
}
default : // BCOLORMODIFYMODE_INTERPOLATE, BCOLORMODIFYMODE_GRAY, BCOLORMODIFYMODE_BLACKANDWHITE
{
BitmapWriteAccess* pContent = aChangedBitmap.AcquireWriteAccess();
if(pContent)
{
const double fConvertColor(1.0 / 255.0);
for(sal_uInt32 y(0L); y < (sal_uInt32)pContent->Height(); y++)
{
for(sal_uInt32 x(0L); x < (sal_uInt32)pContent->Width(); x++)
{
const BitmapColor aBMCol(pContent->GetColor(y, x));
const basegfx::BColor aBSource(
(double)aBMCol.GetRed() * fConvertColor,
(double)aBMCol.GetGreen() * fConvertColor,
(double)aBMCol.GetBlue() * fConvertColor);
const basegfx::BColor aBDest(rModifier.getModifiedColor(aBSource));
pContent->SetPixel(y, x, BitmapColor(Color(aBDest)));
}
}
delete pContent;
}
break;
}
}
}
if(aChangedBitmap.IsEmpty())
{
return BitmapEx();
}
else
{
if(rSource.IsTransparent())
{
if(rSource.IsAlpha())
{
return BitmapEx(aChangedBitmap, rSource.GetAlpha());
}
else
{
return BitmapEx(aChangedBitmap, rSource.GetMask());
}
}
else
{
return BitmapEx(aChangedBitmap);
}
}
}
} // end of namespace drawinglayer
//////////////////////////////////////////////////////////////////////////////
// eof
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|
