portapack-mayhem/firmware/common/ui_text.hpp

/*
 * Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
 *
 * This file is part of PortaPack.
 *
 * 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 2, 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; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street,
 * Boston, MA 02110-1301, USA.
 */

#ifndef __UI_TEXT_H__
#define __UI_TEXT_H__

#include <cstdint>
#include <cstddef>
#include <string>

#include "ui.hpp"

namespace ui {

class Glyph {
public:
	constexpr Glyph(
		Dim w,
		Dim h,
		const uint8_t* const pixels
	) : w_ { static_cast<uint8_t>(w) },
		h_ { static_cast<uint8_t>(h) },
		pixels_ { pixels }
	{
	}

	int w() const {
		return w_;
	}

	int h() const {
		return h_;
	}

	Size size() const {
		return { w_, h_ };
	}

	Point advance() const {
		return { w_, 0 };
	}

	const uint8_t* pixels() const {
		return pixels_;
	}

private:
	const uint8_t w_;
	const uint8_t h_;
	const uint8_t* const pixels_;
};

class Font {
public:
	constexpr Font(
		Dim w,
		Dim h,
		const uint8_t* data,
		char c_start,
		size_t c_count
	) : w { w },
		h { h },
		data { data },
		c_start { c_start },
		c_count { c_count },
		data_stride { (w * h + 7U) >> 3 }
	{
	}

	Glyph glyph(const char c) const;

	Dim line_height() const;
	Size size_of(const std::string s) const;

private:
	const Dim w;
	const Dim h;
	const uint8_t* const data;
	const char c_start;
	const size_t c_count;
	const size_t data_stride;
};

} /* namespace ui */

#endif/*__UI_TEXT_H__*/