1 /*
2 * Copyright (c) 2006 Cyrille Berger <cberger@cberger.net>
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public License
15 * along with this library; see the file COPYING.LIB. If not, write to
16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
18 */
19
20 #include "LabU8ColorSpace.h"
21
22 #include <QDomElement>
23
24 #include <klocalizedstring.h>
25
26 #include "../compositeops/KoCompositeOps.h"
27 #include <KoColorConversions.h>
28 #include <kis_dom_utils.h>
29
LabU8ColorSpace(const QString & name,KoColorProfile * p)30 LabU8ColorSpace::LabU8ColorSpace(const QString &name, KoColorProfile *p) :
31 LcmsColorSpace<KoLabU8Traits>(colorSpaceId(), name, TYPE_LABA_8, cmsSigLabData, p)
32 {
33 addChannel(new KoChannelInfo(i18nc("Lightness value in Lab color model", "Lightness"), 0 * sizeof(quint8), 0, KoChannelInfo::COLOR, KoChannelInfo::UINT8, sizeof(quint8), QColor(100, 100, 100)));
34 addChannel(new KoChannelInfo(i18n("a*"), 1 * sizeof(quint8), 1, KoChannelInfo::COLOR, KoChannelInfo::UINT8, sizeof(quint8), QColor(150, 150, 150)));
35 addChannel(new KoChannelInfo(i18n("b*"), 2 * sizeof(quint8), 2, KoChannelInfo::COLOR, KoChannelInfo::UINT8, sizeof(quint8), QColor(200, 200, 200)));
36 addChannel(new KoChannelInfo(i18n("Alpha"), 3 * sizeof(quint8), 3, KoChannelInfo::ALPHA, KoChannelInfo::UINT8, sizeof(quint8)));
37 init();
38 addStandardCompositeOps<KoLabU8Traits>(this);
39 }
40
willDegrade(ColorSpaceIndependence) const41 bool LabU8ColorSpace::willDegrade(ColorSpaceIndependence /*independence*/) const
42 {
43 return false;
44 }
45
clone() const46 KoColorSpace *LabU8ColorSpace::clone() const
47 {
48 return new LabU8ColorSpace(name(), profile()->clone());
49 }
50
colorToXML(const quint8 * pixel,QDomDocument & doc,QDomElement & colorElt) const51 void LabU8ColorSpace::colorToXML(const quint8 *pixel, QDomDocument &doc, QDomElement &colorElt) const
52 {
53 const KoLabU8Traits::Pixel *p = reinterpret_cast<const KoLabU8Traits::Pixel *>(pixel);
54 QDomElement labElt = doc.createElement("Lab");
55
56 double a, b;
57
58 if (p->a <= KoLabColorSpaceMathsTraits<KoLabU8Traits::channels_type>::halfValueAB) {
59 a = (p->a - KoLabColorSpaceMathsTraits<KoLabU8Traits::channels_type>::zeroValueAB) /
60 (2.0 * (KoLabColorSpaceMathsTraits<KoLabU8Traits::channels_type>::halfValueAB - KoLabColorSpaceMathsTraits<KoLabU8Traits::channels_type>::zeroValueAB));
61 } else {
62 a = 0.5 +
63 (p->a - KoLabColorSpaceMathsTraits<KoLabU8Traits::channels_type>::halfValueAB) /
64 (2.0 * (KoLabColorSpaceMathsTraits<KoLabU8Traits::channels_type>::unitValueAB - KoLabColorSpaceMathsTraits<KoLabU8Traits::channels_type>::halfValueAB));
65 }
66
67 if (p->b <= KoLabColorSpaceMathsTraits<KoLabU8Traits::channels_type>::halfValueAB) {
68 b = (p->b - KoLabColorSpaceMathsTraits<KoLabU8Traits::channels_type>::zeroValueAB) /
69 (2.0 * (KoLabColorSpaceMathsTraits<KoLabU8Traits::channels_type>::halfValueAB - KoLabColorSpaceMathsTraits<KoLabU8Traits::channels_type>::zeroValueAB));
70 } else {
71 b = 0.5 +
72 (p->b - KoLabColorSpaceMathsTraits<KoLabU8Traits::channels_type>::halfValueAB) /
73 (2.0 * (KoLabColorSpaceMathsTraits<KoLabU8Traits::channels_type>::unitValueAB - KoLabColorSpaceMathsTraits<KoLabU8Traits::channels_type>::halfValueAB));
74 }
75
76 labElt.setAttribute("L", KisDomUtils::toString(KoColorSpaceMaths<KoLabU8Traits::channels_type, qreal>::scaleToA(p->L)));
77 labElt.setAttribute("a", KisDomUtils::toString(a));
78 labElt.setAttribute("b", KisDomUtils::toString(b));
79 labElt.setAttribute("space", profile()->name());
80 colorElt.appendChild(labElt);
81 }
82
colorFromXML(quint8 * pixel,const QDomElement & elt) const83 void LabU8ColorSpace::colorFromXML(quint8 *pixel, const QDomElement &elt) const
84 {
85 KoLabU8Traits::Pixel *p = reinterpret_cast<KoLabU8Traits::Pixel *>(pixel);
86
87 double a = KisDomUtils::toDouble(elt.attribute("a"));
88 double b = KisDomUtils::toDouble(elt.attribute("b"));
89
90 p->L = KoColorSpaceMaths<qreal, KoLabU8Traits::channels_type>::scaleToA(KisDomUtils::toDouble(elt.attribute("L")));
91
92 if (a <= 0.5) {
93 p->a =
94 KoLabColorSpaceMathsTraits<KoLabU8Traits::channels_type>::zeroValueAB + 2.0 * a * (KoLabColorSpaceMathsTraits<KoLabU8Traits::channels_type>::halfValueAB - KoLabColorSpaceMathsTraits<KoLabU8Traits::channels_type>::zeroValueAB);
95 } else {
96 p->a = (KoLabColorSpaceMathsTraits<KoLabU8Traits::channels_type>::halfValueAB +
97 2.0 * (a - 0.5) * (KoLabColorSpaceMathsTraits<KoLabU8Traits::channels_type>::unitValueAB - KoLabColorSpaceMathsTraits<KoLabU8Traits::channels_type>::halfValueAB));
98 }
99
100 if (b <= 0.5) {
101 p->b =
102 KoLabColorSpaceMathsTraits<KoLabU8Traits::channels_type>::zeroValueAB + 2.0 * b * (KoLabColorSpaceMathsTraits<KoLabU8Traits::channels_type>::halfValueAB - KoLabColorSpaceMathsTraits<KoLabU8Traits::channels_type>::zeroValueAB);
103 } else {
104 p->b = (KoLabColorSpaceMathsTraits<KoLabU8Traits::channels_type>::halfValueAB +
105 2.0 * (b - 0.5) * (KoLabColorSpaceMathsTraits<KoLabU8Traits::channels_type>::unitValueAB - KoLabColorSpaceMathsTraits<KoLabU8Traits::channels_type>::halfValueAB));
106 }
107
108 p->alpha = KoColorSpaceMathsTraits<quint8>::max;
109 }
110
toHSY(const QVector<double> & channelValues,qreal * hue,qreal * sat,qreal * luma) const111 void LabU8ColorSpace::toHSY(const QVector<double> &channelValues, qreal *hue, qreal *sat, qreal *luma) const
112 {
113 LabToLCH(channelValues[0],channelValues[1],channelValues[2], luma, sat, hue);
114 }
115
fromHSY(qreal * hue,qreal * sat,qreal * luma) const116 QVector <double> LabU8ColorSpace::fromHSY(qreal *hue, qreal *sat, qreal *luma) const
117 {
118 QVector <double> channelValues(4);
119 LCHToLab(*luma, *sat, *hue, &channelValues[0],&channelValues[1],&channelValues[2]);
120 channelValues[3]=1.0;
121 return channelValues;
122 }
123
toYUV(const QVector<double> & channelValues,qreal * y,qreal * u,qreal * v) const124 void LabU8ColorSpace::toYUV(const QVector<double> &channelValues, qreal *y, qreal *u, qreal *v) const
125 {
126 *y =channelValues[0];
127 *u=channelValues[1];
128 *v=channelValues[2];
129 }
130
fromYUV(qreal * y,qreal * u,qreal * v) const131 QVector <double> LabU8ColorSpace::fromYUV(qreal *y, qreal *u, qreal *v) const
132 {
133 QVector <double> channelValues(4);
134 channelValues[0]=*y;
135 channelValues[1]=*u;
136 channelValues[2]=*v;
137 channelValues[3]=1.0;
138 return channelValues;
139 }
140
scaleToU8(const quint8 * srcPixel,qint32 channelIndex) const141 quint8 LabU8ColorSpace::scaleToU8(const quint8 *srcPixel, qint32 channelIndex) const
142 {
143 typename ColorSpaceTraits::channels_type c = ColorSpaceTraits::nativeArray(srcPixel)[channelIndex];
144 qreal b = 0;
145 switch (channelIndex) {
146 case ColorSpaceTraits::L_pos:
147 b = ((qreal)c) / ColorSpaceTraits::math_trait::unitValueL;
148 break;
149 case ColorSpaceTraits::a_pos:
150 case ColorSpaceTraits::b_pos:
151 if (c <= ColorSpaceTraits::math_trait::halfValueAB) {
152 b = ((qreal)c - ColorSpaceTraits::math_trait::zeroValueAB) / (2.0 * (ColorSpaceTraits::math_trait::halfValueAB - ColorSpaceTraits::math_trait::zeroValueAB));
153 } else {
154 b = 0.5 + ((qreal)c - ColorSpaceTraits::math_trait::halfValueAB) / (2.0 * (ColorSpaceTraits::math_trait::unitValueAB - ColorSpaceTraits::math_trait::halfValueAB));
155 }
156 break;
157 default:
158 b = ((qreal)c) / ColorSpaceTraits::math_trait::unitValue;
159 break;
160 }
161
162 return KoColorSpaceMaths<qreal, quint8>::scaleToA(b);
163 }
164
convertChannelToVisualRepresentation(const quint8 * src,quint8 * dst,quint32 nPixels,const qint32 selectedChannelIndex) const165 void LabU8ColorSpace::convertChannelToVisualRepresentation(const quint8 *src, quint8 *dst, quint32 nPixels, const qint32 selectedChannelIndex) const
166 {
167 for (uint pixelIndex = 0; pixelIndex < nPixels; ++pixelIndex) {
168 for (uint channelIndex = 0; channelIndex < this->channelCount(); ++channelIndex) {
169 KoChannelInfo *channel = this->channels().at(channelIndex);
170 qint32 channelSize = channel->size();
171 if (channel->channelType() == KoChannelInfo::COLOR) {
172 if (channelIndex == ColorSpaceTraits::L_pos) {
173 ColorSpaceTraits::channels_type c = ColorSpaceTraits::parent::nativeArray((src + (pixelIndex * ColorSpaceTraits::pixelSize)))[selectedChannelIndex];
174 switch (selectedChannelIndex) {
175 case ColorSpaceTraits::L_pos:
176 break;
177 case ColorSpaceTraits::a_pos:
178 case ColorSpaceTraits::b_pos:
179 if (c <= ColorSpaceTraits::math_trait::halfValueAB) {
180 c = ColorSpaceTraits::math_trait::unitValueL * (((qreal)c - ColorSpaceTraits::math_trait::zeroValueAB) / (2.0 * (ColorSpaceTraits::math_trait::halfValueAB - ColorSpaceTraits::math_trait::zeroValueAB)));
181 } else {
182 c = ColorSpaceTraits::math_trait::unitValueL * (0.5 + ((qreal)c - ColorSpaceTraits::math_trait::halfValueAB) / (2.0 * (ColorSpaceTraits::math_trait::unitValueAB - ColorSpaceTraits::math_trait::halfValueAB)));
183 }
184 break;
185 // As per KoChannelInfo alpha channels are [0..1]
186 default:
187 c = ColorSpaceTraits::math_trait::unitValueL * (qreal)c / ColorSpaceTraits::math_trait::unitValue;
188 break;
189 }
190 ColorSpaceTraits::parent::nativeArray(dst + (pixelIndex * ColorSpaceTraits::pixelSize))[channelIndex] = c;
191 } else {
192 ColorSpaceTraits::parent::nativeArray(dst + (pixelIndex * ColorSpaceTraits::pixelSize))[channelIndex] = ColorSpaceTraits::math_trait::halfValueAB;
193 }
194 } else if (channel->channelType() == KoChannelInfo::ALPHA) {
195 memcpy(dst + (pixelIndex * ColorSpaceTraits::pixelSize) + (channelIndex * channelSize), src + (pixelIndex * ColorSpaceTraits::pixelSize) + (channelIndex * channelSize), channelSize);
196 }
197 }
198 }
199 }
200
convertChannelToVisualRepresentation(const quint8 * src,quint8 * dst,quint32 nPixels,const QBitArray selectedChannels) const201 void LabU8ColorSpace::convertChannelToVisualRepresentation(const quint8 *src, quint8 *dst, quint32 nPixels, const QBitArray selectedChannels) const
202 {
203 for (uint pixelIndex = 0; pixelIndex < nPixels; ++pixelIndex) {
204 for (uint channelIndex = 0; channelIndex < this->channelCount(); ++channelIndex) {
205 KoChannelInfo *channel = this->channels().at(channelIndex);
206 qint32 channelSize = channel->size();
207 if (selectedChannels.testBit(channelIndex)) {
208 memcpy(dst + (pixelIndex * ColorSpaceTraits::pixelSize) + (channelIndex * channelSize), src + (pixelIndex * ColorSpaceTraits::pixelSize) + (channelIndex * channelSize), channelSize);
209 } else {
210 ColorSpaceTraits::channels_type v;
211 switch (channelIndex) {
212 case ColorSpaceTraits::L_pos:
213 v = ColorSpaceTraits::math_trait::halfValueL;
214 break;
215 case ColorSpaceTraits::a_pos:
216 case ColorSpaceTraits::b_pos:
217 v = ColorSpaceTraits::math_trait::halfValueAB;
218 break;
219 default:
220 v = ColorSpaceTraits::math_trait::zeroValue;
221 break;
222 }
223 reinterpret_cast<ColorSpaceTraits::channels_type *>(dst + (pixelIndex * ColorSpaceTraits::pixelSize) + (channelIndex * channelSize))[0] = v;
224 }
225 }
226 }
227 }
228