1 /*
2 * Copyright (c) 2006 Cyrille Berger <cberger@cberger.net>
3 * Copyright (c) 2020 L. E. Segovia <amy@amyspark.me>
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2.1 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public License
16 * along with this library; see the file COPYING.LIB. If not, write to
17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
19 */
20
21 #include "LabF32ColorSpace.h"
22
23 #include <QDomElement>
24
25 #include <klocalizedstring.h>
26
27 #include "../compositeops/KoCompositeOps.h"
28 #include <KoColorConversions.h>
29 #include <kis_dom_utils.h>
30
LabF32ColorSpace(const QString & name,KoColorProfile * p)31 LabF32ColorSpace::LabF32ColorSpace(const QString &name, KoColorProfile *p)
32 : LcmsColorSpace<KoLabF32Traits>(colorSpaceId(), name, TYPE_LabA_FLT, cmsSigLabData, p)
33 {
34 const IccColorProfile *icc_p = dynamic_cast<const IccColorProfile *>(p);
35 Q_ASSERT(icc_p);
36 QVector<KoChannelInfo::DoubleRange> uiRanges(icc_p->getFloatUIMinMax());
37 Q_ASSERT(uiRanges.size() == 3);
38
39 addChannel(new KoChannelInfo(i18nc("Lightness value in Lab color model", "Lightness"), 0 * sizeof(float), 0, KoChannelInfo::COLOR, KoChannelInfo::FLOAT32, sizeof(float), QColor(100, 100, 100), uiRanges[0]));
40 addChannel(new KoChannelInfo(i18n("a*"), 1 * sizeof(float), 1, KoChannelInfo::COLOR, KoChannelInfo::FLOAT32, sizeof(float), QColor(150, 150, 150), uiRanges[1]));
41 addChannel(new KoChannelInfo(i18n("b*"), 2 * sizeof(float), 2, KoChannelInfo::COLOR, KoChannelInfo::FLOAT32, sizeof(float), QColor(200, 200, 200), uiRanges[2]));
42 addChannel(new KoChannelInfo(i18n("Alpha"), 3 * sizeof(float), 3, KoChannelInfo::ALPHA, KoChannelInfo::FLOAT32, sizeof(float)));
43
44 init();
45
46 addStandardCompositeOps<KoLabF32Traits>(this);
47
48 dbgPlugins << "La*b* (float) channel bounds for: " << icc_p->name();
49 dbgPlugins << "L: " << uiRanges[0].minVal << uiRanges[0].maxVal;
50 dbgPlugins << "a: " << uiRanges[1].minVal << uiRanges[1].maxVal;
51 dbgPlugins << "b: " << uiRanges[2].minVal << uiRanges[2].maxVal;
52 }
53
willDegrade(ColorSpaceIndependence independence) const54 bool LabF32ColorSpace::willDegrade(ColorSpaceIndependence independence) const
55 {
56 if (independence == TO_RGBA16) {
57 return true;
58 } else {
59 return false;
60 }
61 }
62
clone() const63 KoColorSpace *LabF32ColorSpace::clone() const
64 {
65 return new LabF32ColorSpace(name(), profile()->clone());
66 }
67
colorToXML(const quint8 * pixel,QDomDocument & doc,QDomElement & colorElt) const68 void LabF32ColorSpace::colorToXML(const quint8 *pixel, QDomDocument &doc, QDomElement &colorElt) const
69 {
70 const KoLabF32Traits::Pixel *p = reinterpret_cast<const KoLabF32Traits::Pixel *>(pixel);
71 QDomElement labElt = doc.createElement("Lab");
72
73 // XML expects 0-1, we need 0-100, -128-+127
74 // Get the bounds from the channels and adjust the calculations
75 labElt.setAttribute("L", KisDomUtils::toString(KoColorSpaceMaths< KoLabF32Traits::channels_type, qreal>::scaleToA(1.f / this->channels()[0]->getUIUnitValue() * (p->L - this->channels()[0]->getUIMin()))));
76 labElt.setAttribute("a", KisDomUtils::toString(KoColorSpaceMaths< KoLabF32Traits::channels_type, qreal>::scaleToA(1.f / this->channels()[1]->getUIUnitValue() * (p->a - this->channels()[1]->getUIMin()))));
77 labElt.setAttribute("b", KisDomUtils::toString(KoColorSpaceMaths< KoLabF32Traits::channels_type, qreal>::scaleToA(1.f / this->channels()[2]->getUIUnitValue() * (p->b - this->channels()[2]->getUIMin()))));
78 labElt.setAttribute("space", profile()->name());
79 colorElt.appendChild(labElt);
80 }
81
colorFromXML(quint8 * pixel,const QDomElement & elt) const82 void LabF32ColorSpace::colorFromXML(quint8 *pixel, const QDomElement &elt) const
83 {
84 KoLabF32Traits::Pixel *p = reinterpret_cast<KoLabF32Traits::Pixel *>(pixel);
85 p->L = this->channels()[0]->getUIMin() + KoColorSpaceMaths< qreal, KoLabF32Traits::channels_type >::scaleToA(KisDomUtils::toDouble(elt.attribute("L"))) * this->channels()[0]->getUIUnitValue();
86 p->a = this->channels()[1]->getUIMin() + KoColorSpaceMaths< qreal, KoLabF32Traits::channels_type >::scaleToA(KisDomUtils::toDouble(elt.attribute("a"))) * this->channels()[1]->getUIUnitValue();
87 p->b = this->channels()[2]->getUIMin() + KoColorSpaceMaths< qreal, KoLabF32Traits::channels_type >::scaleToA(KisDomUtils::toDouble(elt.attribute("b"))) * this->channels()[2]->getUIUnitValue();
88 p->alpha = 1.0;
89 }
90
toHSY(const QVector<double> & channelValues,qreal * hue,qreal * sat,qreal * luma) const91 void LabF32ColorSpace::toHSY(const QVector<double> &channelValues, qreal *hue, qreal *sat, qreal *luma) const
92 {
93 LabToLCH(channelValues[0],channelValues[1],channelValues[2], luma, sat, hue);
94 }
95
fromHSY(qreal * hue,qreal * sat,qreal * luma) const96 QVector <double> LabF32ColorSpace::fromHSY(qreal *hue, qreal *sat, qreal *luma) const
97 {
98 QVector <double> channelValues(4);
99 LCHToLab(*luma, *sat, *hue, &channelValues[0],&channelValues[1],&channelValues[2]);
100 channelValues[3]=1.0;
101 return channelValues;
102 }
toYUV(const QVector<double> & channelValues,qreal * y,qreal * u,qreal * v) const103 void LabF32ColorSpace::toYUV(const QVector<double> &channelValues, qreal *y, qreal *u, qreal *v) const
104 {
105 *y =channelValues[0];
106 *u=channelValues[1];
107 *v=channelValues[2];
108 }
109
fromYUV(qreal * y,qreal * u,qreal * v) const110 QVector <double> LabF32ColorSpace::fromYUV(qreal *y, qreal *u, qreal *v) const
111 {
112 QVector <double> channelValues(4);
113 channelValues[0]=*y;
114 channelValues[1]=*u;
115 channelValues[2]=*v;
116 channelValues[3]=1.0;
117 return channelValues;
118 }
119
scaleToU8(const quint8 * srcPixel,qint32 channelIndex) const120 quint8 LabF32ColorSpace::scaleToU8(const quint8 *srcPixel, qint32 channelIndex) const
121 {
122 typename ColorSpaceTraits::channels_type c = ColorSpaceTraits::nativeArray(srcPixel)[channelIndex];
123 qreal b = 0;
124 switch (channelIndex) {
125 case ColorSpaceTraits::L_pos:
126 b = ((qreal)c) / ColorSpaceTraits::math_trait::unitValueL;
127 break;
128 case ColorSpaceTraits::a_pos:
129 case ColorSpaceTraits::b_pos:
130 if (c <= ColorSpaceTraits::math_trait::halfValueAB) {
131 b = ((qreal)c - ColorSpaceTraits::math_trait::zeroValueAB) / (2.0 * (ColorSpaceTraits::math_trait::halfValueAB - ColorSpaceTraits::math_trait::zeroValueAB));
132 } else {
133 b = 0.5 + ((qreal)c - ColorSpaceTraits::math_trait::halfValueAB) / (2.0 * (ColorSpaceTraits::math_trait::unitValueAB - ColorSpaceTraits::math_trait::halfValueAB));
134 }
135 break;
136 default:
137 b = ((qreal)c) / ColorSpaceTraits::math_trait::unitValue;
138 break;
139 }
140
141 return KoColorSpaceMaths<qreal, quint8>::scaleToA(b);
142 }
143
convertChannelToVisualRepresentation(const quint8 * src,quint8 * dst,quint32 nPixels,const qint32 selectedChannelIndex) const144 void LabF32ColorSpace::convertChannelToVisualRepresentation(const quint8 *src, quint8 *dst, quint32 nPixels, const qint32 selectedChannelIndex) const
145 {
146 for (uint pixelIndex = 0; pixelIndex < nPixels; ++pixelIndex) {
147 for (uint channelIndex = 0; channelIndex < this->channelCount(); ++channelIndex) {
148 KoChannelInfo *channel = this->channels().at(channelIndex);
149 qint32 channelSize = channel->size();
150 if (channel->channelType() == KoChannelInfo::COLOR) {
151 if (channelIndex == ColorSpaceTraits::L_pos) {
152 ColorSpaceTraits::channels_type c = ColorSpaceTraits::parent::nativeArray((src + (pixelIndex * ColorSpaceTraits::pixelSize)))[selectedChannelIndex];
153 switch (selectedChannelIndex) {
154 case ColorSpaceTraits::L_pos:
155 break;
156 case ColorSpaceTraits::a_pos:
157 case ColorSpaceTraits::b_pos:
158 if (c <= ColorSpaceTraits::math_trait::halfValueAB) {
159 c = ColorSpaceTraits::math_trait::unitValueL * (((qreal)c - ColorSpaceTraits::math_trait::zeroValueAB) / (2.0 * (ColorSpaceTraits::math_trait::halfValueAB - ColorSpaceTraits::math_trait::zeroValueAB)));
160 } else {
161 c = ColorSpaceTraits::math_trait::unitValueL * (0.5 + ((qreal)c - ColorSpaceTraits::math_trait::halfValueAB) / (2.0 * (ColorSpaceTraits::math_trait::unitValueAB - ColorSpaceTraits::math_trait::halfValueAB)));
162 }
163 break;
164 // As per KoChannelInfo alpha channels are [0..1]
165 default:
166 c = ColorSpaceTraits::math_trait::unitValueL * (qreal)c / ColorSpaceTraits::math_trait::unitValue;
167 break;
168 }
169 ColorSpaceTraits::parent::nativeArray(dst + (pixelIndex * ColorSpaceTraits::pixelSize))[channelIndex] = c;
170 } else {
171 ColorSpaceTraits::parent::nativeArray(dst + (pixelIndex * ColorSpaceTraits::pixelSize))[channelIndex] = ColorSpaceTraits::math_trait::halfValueAB;
172 }
173 } else if (channel->channelType() == KoChannelInfo::ALPHA) {
174 memcpy(dst + (pixelIndex * ColorSpaceTraits::pixelSize) + (channelIndex * channelSize), src + (pixelIndex * ColorSpaceTraits::pixelSize) + (channelIndex * channelSize), channelSize);
175 }
176 }
177 }
178 }
179
convertChannelToVisualRepresentation(const quint8 * src,quint8 * dst,quint32 nPixels,const QBitArray selectedChannels) const180 void LabF32ColorSpace::convertChannelToVisualRepresentation(const quint8 *src, quint8 *dst, quint32 nPixels, const QBitArray selectedChannels) const
181 {
182 for (uint pixelIndex = 0; pixelIndex < nPixels; ++pixelIndex) {
183 for (uint channelIndex = 0; channelIndex < this->channelCount(); ++channelIndex) {
184 KoChannelInfo *channel = this->channels().at(channelIndex);
185 qint32 channelSize = channel->size();
186 if (selectedChannels.testBit(channelIndex)) {
187 memcpy(dst + (pixelIndex * ColorSpaceTraits::pixelSize) + (channelIndex * channelSize), src + (pixelIndex * ColorSpaceTraits::pixelSize) + (channelIndex * channelSize), channelSize);
188 } else {
189 ColorSpaceTraits::channels_type v;
190 switch (channelIndex) {
191 case ColorSpaceTraits::L_pos:
192 v = ColorSpaceTraits::math_trait::halfValueL;
193 break;
194 case ColorSpaceTraits::a_pos:
195 case ColorSpaceTraits::b_pos:
196 v = ColorSpaceTraits::math_trait::halfValueAB;
197 break;
198 default:
199 v = ColorSpaceTraits::math_trait::zeroValue;
200 break;
201 }
202 reinterpret_cast<ColorSpaceTraits::channels_type *>(dst + (pixelIndex * ColorSpaceTraits::pixelSize) + (channelIndex * channelSize))[0] = v;
203 }
204 }
205 }
206 }
207