diff options
Diffstat (limited to 'src/gui/painting/qcolormatrix_p.h')
| -rw-r--r-- | src/gui/painting/qcolormatrix_p.h | 45 |
1 files changed, 40 insertions, 5 deletions
diff --git a/src/gui/painting/qcolormatrix_p.h b/src/gui/painting/qcolormatrix_p.h index 3d1dca6222..66db95df7e 100644 --- a/src/gui/painting/qcolormatrix_p.h +++ b/src/gui/painting/qcolormatrix_p.h @@ -52,6 +52,7 @@ // #include <QtGui/qtguiglobal.h> +#include <QtCore/qpoint.h> #include <cmath> QT_BEGIN_NAMESPACE @@ -61,7 +62,13 @@ class QColorVector { public: QColorVector() = default; - constexpr QColorVector(float x, float y, float z) : x(x), y(y), z(z), _unused(0.0f) { } + Q_DECL_CONSTEXPR QColorVector(float x, float y, float z) : x(x), y(y), z(z), _unused(0.0f) { } + explicit Q_DECL_CONSTEXPR QColorVector(const QPointF &chr) // from XY chromaticity + : x(chr.x() / chr.y()) + , y(1.0f) + , z((1.0 - chr.x() - chr.y()) / chr.y()) + , _unused(0.0f) + { } float x; // X, x or red float y; // Y, y or green float z; // Z, Y or blue @@ -69,11 +76,28 @@ public: friend inline bool operator==(const QColorVector &v1, const QColorVector &v2); friend inline bool operator!=(const QColorVector &v1, const QColorVector &v2); + bool isNull() const + { + return !x && !y && !z; + } + + static Q_DECL_CONSTEXPR QColorVector null() { return QColorVector(0.0f, 0.0f, 0.0f); } + static bool isValidChromaticity(const QPointF &chr) + { + if (chr.x() < qreal(0.0) || chr.x() > qreal(1.0)) + return false; + if (chr.y() <= qreal(0.0) || chr.y() > qreal(1.0)) + return false; + if (chr.x() + chr.y() > qreal(1.0)) + return false; + return true; + } - static constexpr QColorVector null() { return QColorVector(0.0f, 0.0f, 0.0f); } - // Common whitepoints on normalized XYZ form: - static constexpr QColorVector D50() { return QColorVector(0.96421f, 1.0f, 0.82519f); } - static constexpr QColorVector D65() { return QColorVector(0.95043f, 1.0f, 1.08890f); } + // Common whitepoints: + static Q_DECL_CONSTEXPR QPointF D50Chromaticity() { return QPointF(0.34567, 0.35850); } + static Q_DECL_CONSTEXPR QPointF D65Chromaticity() { return QPointF(0.31271, 0.32902); } + static Q_DECL_CONSTEXPR QColorVector D50() { return QColorVector(D50Chromaticity()); } + static Q_DECL_CONSTEXPR QColorVector D65() { return QColorVector(D65Chromaticity()); } }; inline bool operator==(const QColorVector &v1, const QColorVector &v2) @@ -102,6 +126,10 @@ public: friend inline bool operator==(const QColorMatrix &m1, const QColorMatrix &m2); friend inline bool operator!=(const QColorMatrix &m1, const QColorMatrix &m2); + bool isNull() const + { + return r.isNull() && g.isNull() && b.isNull(); + } bool isValid() const { // A color matrix must be invertible @@ -167,6 +195,13 @@ public: { return { { 1.0f, 0.0f, 0.0f }, { 0.0f, 1.0f, 0.0f }, { 0.0f, 0.0f, 1.0f } }; } + static QColorMatrix fromScale(QColorVector v) + { + return QColorMatrix { { v.x, 0.0f, 0.0f }, + { 0.0f, v.y, 0.0f }, + { 0.0f, 0.0f, v.z } }; + } + // These are used to recognize matrices from ICC profiles: static QColorMatrix toXyzFromSRgb() { return QColorMatrix { { 0.4360217452f, 0.2224751115f, 0.0139281144f }, |