Warning, file /office/calligra/libs/pigment/KoColorConversionAlphaTransformation.cpp was not indexed or was modified since last indexation (in which case cross-reference links may be missing, inaccurate or erroneous).

 /*
  *  Copyright (c) 2007 Cyrille Berger <cberger@cberger.net>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
  * This library 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 for more details.
  *
  * You should have received a copy of the GNU Lesser General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
 */
 
 #include "KoColorConversionAlphaTransformation.h"
 
 #include "KoColorSpace.h"
 #include "KoIntegerMaths.h"
 #include "KoColorSpaceTraits.h"
 #include "KoColorModelStandardIds.h"
 
 /**
  * Converter from the alpha color space to any color space
  */
 class KoColorConversionFromAlphaTransformation : public KoColorConversionTransformation
 {
 public:
     KoColorConversionFromAlphaTransformation(const KoColorSpace* srcCs, const KoColorSpace* dstCs,
                                              Intent renderingIntent,
                                              KoColorConversionTransformation::ConversionFlags conversionFlags);
     void transform(const quint8 *src, quint8 *dst, qint32 nPixels) const override;
 };
 
 //------ KoColorConversionFromAlphaTransformation ------//
 
 KoColorConversionFromAlphaTransformation::KoColorConversionFromAlphaTransformation(const KoColorSpace* srcCs,
                                                                                    const KoColorSpace* dstCs,
                                                                                    Intent renderingIntent,
                                                                                    ConversionFlags conversionFlags)
     : KoColorConversionTransformation(srcCs, dstCs, renderingIntent, conversionFlags)
 {
 
 }
 
 void KoColorConversionFromAlphaTransformation::transform(const quint8 *src, quint8 *dst, qint32 nPixels) const
 {
     quint16 data[4];
     qint32 size = dstColorSpace()->pixelSize();
 
     data[1] = UINT16_MAX / 2;   // a
     data[2] = UINT16_MAX / 2;   // b
     data[3] = UINT16_MAX;       // A
 
     while (nPixels > 0) {
 
         data[0] = UINT8_TO_UINT16(*src); // L
         dstColorSpace()->fromLabA16((quint8*)data, dst, 1);
 
         src ++;
         dst += size;
         nPixels--;
 
     }
 }
 
 class KoColorConversionGrayAU8FromAlphaTransformation : public KoColorConversionTransformation
 {
 public:
     KoColorConversionGrayAU8FromAlphaTransformation(const KoColorSpace* srcCs,
                                                     const KoColorSpace* dstCs,
                                                     Intent renderingIntent,
                                                     KoColorConversionTransformation::ConversionFlags conversionFlags)
         : KoColorConversionTransformation(srcCs, dstCs, renderingIntent, conversionFlags)
     {
     }
     void transform(const quint8 *src, quint8 *dst, qint32 nPixels) const override {
         while (nPixels > 0) {
 
             dst[0] = *src;
             dst[1] = 255;
 
             src ++;
             dst += 2;
             nPixels--;
         }
     }
 };
 
 //------ KoColorConversionFromAlphaTransformationFactory ------//
 
 KoColorConversionFromAlphaTransformationFactory::KoColorConversionFromAlphaTransformationFactory(const QString& _dstModelId, const QString& _dstDepthId, const QString& _dstProfileName)
     : KoColorConversionTransformationFactory(AlphaColorModelID.id(), Integer8BitsColorDepthID.id(), "", _dstModelId, _dstDepthId, _dstProfileName)
 {
 }
 
 KoColorConversionTransformation* KoColorConversionFromAlphaTransformationFactory::createColorTransformation(const KoColorSpace* srcColorSpace,
                                                                                                             const KoColorSpace* dstColorSpace,
                                                                                                             KoColorConversionTransformation::Intent renderingIntent,
                                                                                                             KoColorConversionTransformation::ConversionFlags conversionFlags) const
 {
     Q_ASSERT(canBeSource(srcColorSpace));
     Q_ASSERT(canBeDestination(dstColorSpace));
 
     if (dstColorSpace->id() == "GRAYA") {
         return new KoColorConversionGrayAU8FromAlphaTransformation(srcColorSpace, dstColorSpace, renderingIntent, conversionFlags);
     } else {
         return new KoColorConversionFromAlphaTransformation(srcColorSpace, dstColorSpace, renderingIntent, conversionFlags);
     }
 }
 
 bool KoColorConversionFromAlphaTransformationFactory::conserveColorInformation() const
 {
     return false;
 }
 
 bool KoColorConversionFromAlphaTransformationFactory::conserveDynamicRange() const
 {
     return false;
 }
 
 //------ KoColorConversionToAlphaTransformation ------//
 
 /**
  * Converter to the alpha color space to any color space
  */
 class KoColorConversionToAlphaTransformation : public KoColorConversionTransformation
 {
 public:
     KoColorConversionToAlphaTransformation(const KoColorSpace* srcCs, const KoColorSpace* dstCs, Intent renderingIntent, ConversionFlags conversionFlags);
     void transform(const quint8 *src, quint8 *dst, qint32 nPixels) const override;
 };
 
 
 KoColorConversionToAlphaTransformation::KoColorConversionToAlphaTransformation(const KoColorSpace* srcCs,
                                                                                const KoColorSpace* dstCs,
                                                                                Intent renderingIntent,
                                                                                ConversionFlags conversionFlags)
     : KoColorConversionTransformation(srcCs, dstCs, renderingIntent, conversionFlags)
 {
 
 }
 
 void KoColorConversionToAlphaTransformation::transform(const quint8 *src, quint8 *dst, qint32 nPixels) const
 {
     quint16 data[4];
     qint32 size = srcColorSpace()->pixelSize();
 
     while (nPixels > 0) {
 
         srcColorSpace()->toLabA16(src, (quint8*)data, 1);
         *dst = UINT16_TO_UINT8(UINT16_MULT(data[0], data[3])); // L * A
 
         src += size;
         dst ++;
         nPixels --;
 
     }
 }
 
 //------ KoColorConversionGrayAU8ToAlphaTransformation ------//
 
 class KoColorConversionGrayAU8ToAlphaTransformation : public KoColorConversionTransformation
 {
 public:
     KoColorConversionGrayAU8ToAlphaTransformation(const KoColorSpace* srcCs,
                                                   const KoColorSpace* dstCs,
                                                   Intent renderingIntent,
                                                   ConversionFlags conversionFlags)
         : KoColorConversionTransformation(srcCs, dstCs, renderingIntent, conversionFlags)
     {
     }
 
     void transform(const quint8 *src, quint8 *dst, qint32 nPixels) const override
     {
         while (nPixels > 0) {
 
             *dst = UINT8_MULT(src[0], src[1]);
 
             src += 2;
             dst ++;
             nPixels --;
         }
     }
 };
 
 //------ KoColorConversionToAlphaTransformationFactory ------//
 
 KoColorConversionToAlphaTransformationFactory::KoColorConversionToAlphaTransformationFactory(const QString& _srcModelId, const QString& _srcDepthId, const QString& _srcProfileName)
         : KoColorConversionTransformationFactory(_srcModelId, _srcDepthId, _srcProfileName, AlphaColorModelID.id(), Integer8BitsColorDepthID.id(), "")
 {
 }
 
 KoColorConversionTransformation* KoColorConversionToAlphaTransformationFactory::createColorTransformation(const KoColorSpace* srcColorSpace,
                                                                                                           const KoColorSpace* dstColorSpace,
                                                                                                           KoColorConversionTransformation::Intent renderingIntent,
                                                                                                           KoColorConversionTransformation::ConversionFlags conversionFlags) const
 {
     Q_ASSERT(canBeSource(srcColorSpace));
     Q_ASSERT(canBeDestination(dstColorSpace));
 
     if (srcColorSpace->id() == "GRAYA") {
         return new KoColorConversionGrayAU8ToAlphaTransformation(srcColorSpace, dstColorSpace, renderingIntent, conversionFlags);
     } else {
         return new KoColorConversionToAlphaTransformation(srcColorSpace, dstColorSpace, renderingIntent, conversionFlags);
     }
 }
 
 bool KoColorConversionToAlphaTransformationFactory::conserveColorInformation() const
 {
     return false;
 }
 
 bool KoColorConversionToAlphaTransformationFactory::conserveDynamicRange() const
 {
     return false;
 }