lchdouble.cpp

// SPDX-FileCopyrightText: Lukas Sommer <sommerluk@gmail.com>
// SPDX-License-Identifier: BSD-2-Clause OR MIT
 
// Own header
#include "lchdouble.h"
 
#include <type_traits>
 
#include <lcms2.h>
 
/** @internal
 *
 * @file
 *
 * This file defines some static asserts for the data type
 * @ref PerceptualColor::LchDouble. */
 
namespace PerceptualColor
{
// We are using double. Check that we stay compatible with cmsCIELCh
// which is based on cmsFloat64Number.
static_assert(std::is_same_v<cmsFloat64Number, double>);
 
static_assert(sizeof(double) == sizeof(cmsFloat64Number));
 
static_assert(sizeof(LchDouble) == sizeof(cmsCIELCh));
 
static_assert(std::is_trivially_copyable_v<LchDouble>);
static_assert(std::is_trivial_v<LchDouble>);
 
static_assert(std::is_standard_layout_v<LchDouble>);
 
static_assert(std::is_default_constructible_v<LchDouble>);
static_assert(std::is_trivially_default_constructible_v<LchDouble>);
static_assert(std::is_nothrow_default_constructible_v<LchDouble>);
 
static_assert(std::is_copy_constructible_v<LchDouble>);
static_assert(std::is_trivially_copy_constructible_v<LchDouble>);
static_assert(std::is_nothrow_copy_constructible_v<LchDouble>);
 
static_assert(std::is_move_constructible_v<LchDouble>);
static_assert(std::is_trivially_move_constructible_v<LchDouble>);
static_assert(std::is_nothrow_move_constructible_v<LchDouble>);
 
/** @brief Adds QDebug() support for data type
 * @ref PerceptualColor::LchDouble
 *
 * @param dbg Existing debug object
 * @param value Value to stream into the debug object
 * @returns Debug object with value streamed in
 *
 * @internal
 *
 * @todo This is originally declared in the global namespace instead of
 * the @ref PerceptualColor namespace, because the supported value was
 * a <tt>typedef</tt> for a LittleCMS type in the global; when declaring
 * this function in @ref PerceptualColor namespace, it did not work
 * in the global namespace. Now, things have changed. But we should write
 * a unit test for if it works in global namespace! */
QDebug operator<<(QDebug dbg, const PerceptualColor::LchDouble &value)
{
    dbg.nospace() << "LchDouble(" << value.l << "% " << value.c << " " << value.h << "°)";
    return dbg.maybeSpace();
}
 
/** @brief Compares coordinates with another object.
 *
 * @param other The object to compare with
 * @returns <tt>true</tt> if all three coordinates @ref l, @ref c and @ref h
 * of <em>this</em> object are all equal to the coordinates of <em>other</em>.
 * <tt>false</tt> otherwise. Note that two objects with equal @ref l and
 * equal @ref c, but one with h = 5° and the other with h = 365°, are
 * considered non-equal thought both describe the same point in the
 * coordinate space. */
bool LchDouble::hasSameCoordinates(const PerceptualColor::LchDouble &other) const
{
    return ((l == other.l) && (c == other.c) && (h == other.h));
}
 
} // namespace PerceptualColor