libs/pigment/KoMultipleColorConversionTransformation.cpp

0001 /*
0002  *  Copyright (c) 2007 Cyrille Berger <cberger@cberger.net>
0003  *
0004  * This library is free software; you can redistribute it and/or
0005  * modify it under the terms of the GNU Lesser General Public
0006  * License as published by the Free Software Foundation; either
0007  * version 2.1 of the License, or (at your option) any later version.
0008  *
0009  * This library is distributed in the hope that it will be useful,
0010  * but WITHOUT ANY WARRANTY; without even the implied warranty of
0011  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
0012  * Lesser General Public License for more details.
0013  *
0014  * You should have received a copy of the GNU Lesser General Public License
0015  * along with this library; see the file COPYING.LIB.  If not, write to
0016  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
0017  * Boston, MA 02110-1301, USA.
0018 */
0019
0020 #include "KoMultipleColorConversionTransformation.h"
0021
0022 #include <QList>
0023
0024 #include <KoColorSpace.h>
0025
0026 struct Q_DECL_HIDDEN KoMultipleColorConversionTransformation::Private {
0027     QList<KoColorConversionTransformation*> transfos;
0028     quint32 maxPixelSize;
0029 };
0030
0031
0032 KoMultipleColorConversionTransformation::KoMultipleColorConversionTransformation(const KoColorSpace* srcCs, const KoColorSpace* dstCs, Intent renderingIntent, KoColorConversionTransformation::ConversionFlags conversionFlags)
0033     : KoColorConversionTransformation(srcCs, dstCs, renderingIntent, conversionFlags)
0034     , d(new Private)
0035 {
0036     d->maxPixelSize = qMax(srcCs->pixelSize(), dstCs->pixelSize());
0037 }
0038 KoMultipleColorConversionTransformation::~KoMultipleColorConversionTransformation()
0039 {
0040     foreach(KoColorConversionTransformation* transfo, d->transfos) {
0041         delete transfo;
0042     }
0043     delete d;
0044 }
0045 void KoMultipleColorConversionTransformation::appendTransfo(KoColorConversionTransformation* transfo)
0046 {
0047     d->transfos.append(transfo);
0048     d->maxPixelSize = qMax(d->maxPixelSize, transfo->srcColorSpace()->pixelSize());
0049     d->maxPixelSize = qMax(d->maxPixelSize, transfo->dstColorSpace()->pixelSize());
0050 }
0051 void KoMultipleColorConversionTransformation::transform(const quint8 *src, quint8 *dst, qint32 nPixels) const
0052 {
0053     Q_ASSERT(d->transfos.size() > 1); // Be sure to have a more than one transformation
0054     quint8 *buff1 = new quint8[d->maxPixelSize*nPixels];
0055     quint8 *buff2 = 0;
0056     if (d->transfos.size() > 2) {
0057         buff2 = new quint8[d->maxPixelSize*nPixels]; // a second buffer is needed
0058     }
0059     d->transfos.first()->transform(src, buff1, nPixels);
0060     int lastIndex = d->transfos.size() - 2;
0061     for (int i = 1; i <= lastIndex; i++) {
0062         d->transfos[i]->transform(buff1, buff2, nPixels);
0063         quint8* tmp = buff1;
0064         buff1 = buff2;
0065         buff2 = tmp;
0066     }
0067     d->transfos.last()->transform(buff1, dst, nPixels);
0068     delete [] buff2;
0069     delete [] buff1;
0070 }