src/colors.h

/*
 *  LDForge: LDraw parts authoring CAD
 *  Copyright (C) 2013 - 2020 Teemu Piippo
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#pragma once
#include <QColor>
#include "main.h"

namespace ldraw
{
	struct Color;
	class ColorTable;
	Color directColor(const QColor& color);
	bool isDirectColor(Color color);
	QColor directColorFace(Color color);
	QColor colorFace(Color color, const ColorTable& colorTable);
}

struct ldraw::Color
{
	qint32 index = 0;
};

Q_DECLARE_METATYPE(ldraw::Color)

class ldraw::ColorTable
{
public:
	struct ColorDefinition
	{
		QColor faceColor;
		QColor edgeColor;
		QString name;
		QString displayName;
	};
	void clear();
	Result load(QIODevice& device, QTextStream& errors);
	const ColorDefinition& operator[](Color index) const;
	static const ColorDefinition unknownColor;
	auto begin() const { return this->definitions.begin(); }
	auto end() const { return this->definitions.end(); }
	int size() const { return this->definitions.size(); }
private:
	void loadColorFromString(const QString& string);
	std::map<qint32, ColorDefinition> definitions;
};

namespace ldraw
{
	inline bool operator==(const ldraw::Color& one, const ldraw::Color& other)
	{
		return one.index == other.index;
	}

	inline bool operator!=(const ldraw::Color& one, const ldraw::Color& other)
	{
		return one.index != other.index;
	}

	inline bool operator<(const ldraw::Color& one, const ldraw::Color& other)
	{
		return one.index < other.index;
	}

	inline bool operator<=(const ldraw::Color& one, const ldraw::Color& other)
	{
		return one.index <= other.index;
	}

	inline bool operator>(const ldraw::Color& one, const ldraw::Color& other)
	{
		return one.index > other.index;
	}

	inline bool operator>=(const ldraw::Color& one, const ldraw::Color& other)
	{
		return one.index >= other.index;
	}
}

namespace ldraw
{
	static constexpr Color black {0};
	static constexpr Color blue {1};
	static constexpr Color green {2};
	static constexpr Color red {4};
	static constexpr Color yellow {14};
	static constexpr Color white {15};
	static constexpr Color mainColor {16};
	static constexpr Color edgeColor {24};
}

double luma(const QColor& color);