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39
40#ifndef QCOLORSPACE_P_H
41#define QCOLORSPACE_P_H
42
43//
44// W A R N I N G
45// -------------
46//
47// This file is not part of the Qt API. It exists purely as an
48// implementation detail. This header file may change from version to
49// version without notice, or even be removed.
50//
51// We mean it.
52//
53
54#include "qcolorspace.h"
55#include "qcolormatrix_p.h"
56#include "qcolortrc_p.h"
57#include "qcolortrclut_p.h"
58
59#include <QtCore/qmutex.h>
60#include <QtCore/qpoint.h>
61#include <QtCore/qshareddata.h>
62
63QT_BEGIN_NAMESPACE
64
65class Q_AUTOTEST_EXPORT QColorSpacePrimaries
66{
67public:
68 QColorSpacePrimaries() = default;
69 QColorSpacePrimaries(QColorSpace::Primaries primaries);
70 QColorSpacePrimaries(QPointF whitePoint,
71 QPointF redPoint,
72 QPointF greenPoint,
73 QPointF bluePoint)
74 : whitePoint(whitePoint)
75 , redPoint(redPoint)
76 , greenPoint(greenPoint)
77 , bluePoint(bluePoint)
78 { }
79
80 QColorMatrix toXyzMatrix() const;
81 bool areValid() const;
82
83 QPointF whitePoint;
84 QPointF redPoint;
85 QPointF greenPoint;
86 QPointF bluePoint;
87};
88
89class QColorSpacePrivate : public QSharedData
90{
91public:
92 QColorSpacePrivate();
93 QColorSpacePrivate(QColorSpace::NamedColorSpace namedColorSpace);
94 QColorSpacePrivate(QColorSpace::Primaries primaries, QColorSpace::TransferFunction transferFunction, float gamma);
95 QColorSpacePrivate(const QColorSpacePrimaries &primaries, QColorSpace::TransferFunction transferFunction, float gamma);
96 QColorSpacePrivate(const QColorSpacePrivate &other) = default;
97
98 // named different from get to avoid accidental detachs
99 static QColorSpacePrivate *getWritable(QColorSpace &colorSpace)
100 {
101 if (!colorSpace.d_ptr) {
102 colorSpace.d_ptr = new QColorSpacePrivate;
103 colorSpace.d_ptr->ref.ref();
104 } else if (colorSpace.d_ptr->ref.loadRelaxed() != 1) {
105 colorSpace.d_ptr->ref.deref();
106 colorSpace.d_ptr = new QColorSpacePrivate(*colorSpace.d_ptr);
107 colorSpace.d_ptr->ref.ref();
108 }
109 Q_ASSERT(colorSpace.d_ptr->ref.loadRelaxed() == 1);
110 return colorSpace.d_ptr;
111 }
112
113 static const QColorSpacePrivate *get(const QColorSpace &colorSpace)
114 {
115 return colorSpace.d_ptr;
116 }
117
118 void initialize();
119 void setToXyzMatrix();
120 void setTransferFunction();
121 void identifyColorSpace();
122 QColorTransform transformationToColorSpace(const QColorSpacePrivate *out) const;
123
124 static constexpr QColorSpace::NamedColorSpace Unknown = QColorSpace::NamedColorSpace(0);
125 QColorSpace::NamedColorSpace namedColorSpace = Unknown;
126
127 QColorSpace::Primaries primaries = QColorSpace::Primaries::Custom;
128 QColorSpace::TransferFunction transferFunction = QColorSpace::TransferFunction::Custom;
129 float gamma = 0.0f;
130 QColorVector whitePoint;
131
132 QColorTrc trc[3];
133 QColorMatrix toXyz;
134
135 QString description;
136 QByteArray iccProfile;
137
138 static QBasicMutex s_lutWriteLock;
139 struct LUT {
140 LUT() = default;
141 ~LUT() = default;
142 LUT(const LUT &other)
143 {
144 if (other.generated.loadAcquire()) {
145 table[0] = other.table[0];
146 table[1] = other.table[1];
147 table[2] = other.table[2];
148 generated.storeRelaxed(newValue: 1);
149 }
150 }
151 QSharedPointer<QColorTrcLut> &operator[](int i) { return table[i]; }
152 const QSharedPointer<QColorTrcLut> &operator[](int i) const { return table[i]; }
153 QSharedPointer<QColorTrcLut> table[3];
154 QAtomicInt generated;
155 } mutable lut;
156};
157
158QT_END_NAMESPACE
159
160#endif // QCOLORSPACE_P_H
161

source code of qtbase/src/gui/painting/qcolorspace_p.h