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0001 /* 0002 * Copyright (c) 2006 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 #ifndef _KO_COLOR_TRANSFORMATION_H_ 0021 #define _KO_COLOR_TRANSFORMATION_H_ 0022 0023 #include <QHash> 0024 0025 #include "pigment_export.h" 0026 0027 class QVariant; 0028 class QString; 0029 0030 0031 /** 0032 * This is the base class of all color transform that takes n pixels in input 0033 * and n pixels in output. 0034 * 0035 * They are created by color spaces. 0036 * 0037 * For instance: 0038 * @code 0039 * KoColorSpace* cs = KoColorSpaceRegistry::rgb8(); 0040 * quint8 pixelsSrc[ nbpixels * cs->pixelSize() ]; 0041 * quint8 pixelsDst[ nbpixels * cs->pixelSize() ]; 0042 * KoColorTransformation* transfo = cs->createInvertTransformation(); 0043 * transfo->transform( pixelsSrc, pixelsDst, nbpixels ); 0044 * @endcode 0045 */ 0046 class PIGMENTCMS_EXPORT KoColorTransformation 0047 { 0048 public: 0049 virtual ~KoColorTransformation(); 0050 /** 0051 * This function apply the transformation on a given number of pixels. 0052 * 0053 * @param src a pointer to the source pixels 0054 * @param dst a pointer to the destination pixels 0055 * @param nPixels the number of pixels 0056 * 0057 * This function may or may not be thread safe. You need to create one 0058 * KoColorTransformation per thread. 0059 */ 0060 virtual void transform(const quint8 *src, quint8 *dst, qint32 nPixels) const = 0; 0061 0062 /** 0063 * @return the list of parameters 0064 */ 0065 virtual QList<QString> parameters() const; 0066 /** 0067 * Get the parameter id for a parameter name 0068 */ 0069 virtual int parameterId(const QString& name) const; 0070 0071 void setParameters(const QHash<QString, QVariant> & parameters); 0072 /** 0073 * Update one parameter of a cached transformation object. 0074 * 0075 */ 0076 virtual void setParameter(int id, const QVariant& parameter); 0077 0078 /// @return true 0079 virtual bool isValid() const { return true; } 0080 }; 0081 0082 #endif