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| |
| #ifndef QCOLORTRC_P_H |
| #define QCOLORTRC_P_H |
| |
| // |
| // W A R N I N G |
| // ------------- |
| // |
| // This file is not part of the Qt API. It exists purely as an |
| // implementation detail. This header file may change from version to |
| // version without notice, or even be removed. |
| // |
| // We mean it. |
| // |
| |
| #include <QtGui/private/qtguiglobal_p.h> |
| #include "qcolortransferfunction_p.h" |
| #include "qcolortransfertable_p.h" |
| |
| QT_BEGIN_NAMESPACE |
| |
| |
| // Defines an ICC TRC (Tone Reproduction Curve) |
| class Q_GUI_EXPORT QColorTrc |
| { |
| public: |
| QColorTrc() noexcept : m_type(Type::Uninitialized) |
| { } |
| QColorTrc(const QColorTransferFunction &fun) : m_type(Type::Function), m_fun(fun) |
| { } |
| QColorTrc(const QColorTransferTable &table) : m_type(Type::Table), m_table(table) |
| { } |
| |
| enum class Type { |
| Uninitialized, |
| Function, |
| Table |
| }; |
| |
| bool isLinear() const |
| { |
| return m_type == Type::Uninitialized || (m_type == Type::Function && m_fun.isLinear()); |
| } |
| bool isValid() const |
| { |
| return m_type != Type::Uninitialized; |
| } |
| float apply(float x) const |
| { |
| if (m_type == Type::Table) |
| return m_table.apply(x); |
| if (m_type == Type::Function) |
| return m_fun.apply(x); |
| return x; |
| } |
| float applyExtended(float x) const |
| { |
| if (x >= 0.0f && x <= 1.0f) |
| return apply(x); |
| if (m_type == Type::Function) |
| return std::copysign(m_fun.apply(std::abs(x)), x); |
| if (m_type == Type::Table) |
| return x < 0.0f ? 0.0f : 1.0f; |
| return x; |
| } |
| float applyInverse(float x) const |
| { |
| if (m_type == Type::Table) |
| return m_table.applyInverse(x); |
| if (m_type == Type::Function) |
| return m_fun.inverted().apply(x); |
| return x; |
| } |
| float applyInverseExtended(float x) const |
| { |
| if (x >= 0.0f && x <= 1.0f) |
| return applyInverse(x); |
| if (m_type == Type::Function) |
| return std::copysign(applyInverse(x), x); |
| if (m_type == Type::Table) |
| return x < 0.0f ? 0.0f : 1.0f; |
| return x; |
| } |
| |
| friend inline bool operator!=(const QColorTrc &o1, const QColorTrc &o2); |
| friend inline bool operator==(const QColorTrc &o1, const QColorTrc &o2); |
| |
| Type m_type; |
| QColorTransferFunction m_fun; |
| QColorTransferTable m_table; |
| }; |
| |
| inline bool operator!=(const QColorTrc &o1, const QColorTrc &o2) |
| { |
| if (o1.m_type != o2.m_type) |
| return true; |
| if (o1.m_type == QColorTrc::Type::Function) |
| return o1.m_fun != o2.m_fun; |
| if (o1.m_type == QColorTrc::Type::Table) |
| return o1.m_table != o2.m_table; |
| return false; |
| } |
| inline bool operator==(const QColorTrc &o1, const QColorTrc &o2) |
| { |
| return !(o1 != o2); |
| } |
| |
| QT_END_NAMESPACE |
| |
| #endif // QCOLORTRC |