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Viewing changes to plugins/colorengines/lcms2/compositeops/RgbCompositeOpSaturation.h

  • Committer: Bazaar Package Importer
  • Author(s): Alessandro Ghersi
  • Date: 2010-10-27 17:52:57 UTC
  • mfrom: (0.12.1 upstream)
  • Revision ID: james.westby@ubuntu.com-20101027175257-s04zqqk5bs8ckm9o
Tags: 1:2.2.83-0ubuntu1
* Merge with Debian git remaining changes:
 - Add build-deps on librcps-dev, opengtl-dev, libqtgtl-dev, freetds-dev,
   create-resources, libspnav-dev
 - Remove needless build-dep on libwv2-dev
 - koffice-libs recommends create-resources
 - krita recommends pstoedit
 - Keep our patches
* New upstream release 2.3 beta 3
  - Remove debian/patches fixed by upstream
  - Update install files

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plugins/colorengines/lcms2/compositeops/RgbCompositeOpSaturation.h
 
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/*
 
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 *  Copyright (c) 2006 Boudewijn Rempt <boud@valdyas.org>
 
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 *
 
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 *  This program is free software const; you can redistribute it and/or modify
 
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 *  it under the terms of the GNU Lesser General Public License as published by
 
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 *  the Free Software Foundation const; either version 2 of the License, or
 
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 *  (at your option) any later version.
 
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 *
 
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 *  This program is distributed in the hope that it will be useful,
 
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 *  but WITHOUT ANY WARRANTY const; without even the implied warranty of
 
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 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
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 *  GNU Lesser General Public License for more details.
 
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 *
 
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 *  You should have received a copy of the GNU Lesser General Public License
 
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 *  along with this program const; if not, write to the Free Software
 
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 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 
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 */
 
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#ifndef RGBCOMPOSITEOPSATURATION_H
 
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#define RGBCOMPOSITEOPSATURATION_H
 
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#include "KoColorSpaceMaths.h"
 
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#include "KoColorConversions.h"
 
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#include <KoCompositeOp.h>
 
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#define SCALE_TO_FLOAT( v ) KoColorSpaceMaths< channels_type, float>::scaleToA( v )
 
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#define SCALE_FROM_FLOAT( v ) KoColorSpaceMaths< float, channels_type>::scaleToA( v )
 
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template<class _CSTraits>
 
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class RgbCompositeOpSaturation: public KoCompositeOp
 
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{
 
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    typedef typename _CSTraits::channels_type channels_type;
 
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    typedef typename KoColorSpaceMathsTraits<typename _CSTraits::channels_type>::compositetype compositetype;
 
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public:
 
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    RgbCompositeOpSaturation(KoColorSpace * cs, const bool userVisible = true)
 
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            : KoCompositeOp(cs, COMPOSITE_SATURATION, i18n("Saturation"), "", userVisible) {
 
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    }
 
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    using KoCompositeOp::composite;
 
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    void composite(quint8 *dstRowStart, qint32 dstRowStride,
 
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                   const quint8 *srcRowStart, qint32 srcRowStride,
 
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                   const quint8 *maskRowStart, qint32 maskRowStride,
 
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                   qint32 rows, qint32 numColumns,
 
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                   quint8 opacity,
 
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                   const QBitArray & channelFlags) const {
 
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        while (rows > 0) {
 
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            const quint8 *mask = maskRowStart;
 
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            const channels_type *src = reinterpret_cast<const channels_type *>(srcRowStart);
 
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            channels_type *dst = reinterpret_cast<channels_type *>(dstRowStart);
 
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            for (int i = numColumns ; i > 0 ; --i) {
 
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                channels_type srcAlpha = src[_CSTraits::alpha_pos];
 
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                channels_type dstAlpha = dst[_CSTraits::alpha_pos];
 
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                srcAlpha = qMin(srcAlpha, dstAlpha);
 
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                // apply the alphamask
 
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                if (mask != 0) {
 
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                    if (*mask != OPACITY_OPAQUE_U8) {
 
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                        channels_type tmpOpacity = KoColorSpaceMaths<quint8 , channels_type>::scaleToA(*mask);
 
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                        srcAlpha =  KoColorSpaceMaths<channels_type>::multiply(srcAlpha, tmpOpacity);
 
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                    }
 
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                    mask++;
 
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                }
 
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                if (srcAlpha != NATIVE_OPACITY_TRANSPARENT) {
 
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                    if (opacity != OPACITY_OPAQUE_U8) {
 
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                        channels_type tmpOpacity = KoColorSpaceMaths<quint8 , channels_type>::scaleToA(opacity);
 
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                        srcAlpha = KoColorSpaceMaths<channels_type>::multiply(src[_CSTraits::alpha_pos], tmpOpacity);
 
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                    }
 
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                    channels_type srcBlend;
 
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                    if (dstAlpha == NATIVE_OPACITY_OPAQUE) {
 
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                        srcBlend = srcAlpha;
 
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                    } else {
 
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                        channels_type newAlpha = dstAlpha + KoColorSpaceMaths<channels_type>::multiply(NATIVE_OPACITY_OPAQUE - dstAlpha, srcAlpha);
 
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                        dst[_CSTraits::alpha_pos] = newAlpha;
 
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                        if (newAlpha != 0) {
 
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                            srcBlend = KoColorSpaceMaths<channels_type>::divide(srcAlpha, newAlpha);
 
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                        } else {
 
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                            srcBlend = srcAlpha;
 
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                        }
 
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                    }
 
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                    float dstRed = SCALE_TO_FLOAT(dst[_CSTraits::red_pos]);
 
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                    float dstGreen = SCALE_TO_FLOAT(dst[_CSTraits::green_pos]);
 
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                    float dstBlue = SCALE_TO_FLOAT(dst[_CSTraits::blue_pos]);
 
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                    float srcHue;
 
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                    float srcSaturation;
 
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                    float srcValue;
 
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                    float dstHue;
 
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                    float dstSaturation;
 
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                    float dstValue;
 
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                    float srcRed = SCALE_TO_FLOAT(src[_CSTraits::red_pos]);
 
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                    float srcGreen = SCALE_TO_FLOAT(src[_CSTraits::green_pos]);
 
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                    float srcBlue = SCALE_TO_FLOAT(src[_CSTraits::blue_pos]);
 
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                    RGBToHSV(srcRed, srcGreen, srcBlue, &srcHue, &srcSaturation, &srcValue);
 
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                    RGBToHSV(dstRed, dstGreen, dstBlue, &dstHue, &dstSaturation, &dstValue);
 
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                    HSVToRGB(dstHue, srcSaturation, dstValue, &srcRed, &srcGreen, &srcBlue);
 
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                    if (channelFlags.isEmpty() || channelFlags.testBit(_CSTraits::red_pos))
 
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                        dst[_CSTraits::red_pos] = KoColorSpaceMaths<channels_type>::blend(SCALE_FROM_FLOAT(srcRed), SCALE_FROM_FLOAT(dstRed), srcBlend);
 
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                    if (channelFlags.isEmpty() || channelFlags.testBit(_CSTraits::green_pos))
 
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                        dst[_CSTraits::green_pos] = KoColorSpaceMaths<channels_type>::blend(SCALE_FROM_FLOAT(srcGreen), SCALE_FROM_FLOAT(dstGreen), srcBlend);
 
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                    if (channelFlags.isEmpty() || channelFlags.testBit(_CSTraits::blue_pos))
 
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                        dst[_CSTraits::blue_pos] = KoColorSpaceMaths<channels_type>::blend(SCALE_FROM_FLOAT(srcBlue), SCALE_FROM_FLOAT(dstBlue), srcBlend);
 
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                }
 
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                src += _CSTraits::channels_nb;
 
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                dst += _CSTraits::channels_nb;
 
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            }
 
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            rows--;
 
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            srcRowStart += srcRowStride;
 
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            dstRowStart += dstRowStride;
 
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            if (maskRowStart)
 
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                maskRowStart += maskRowStride;
 
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        }
 
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    }
 
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};
 
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#endif