/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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/>.
 *
 */

#include "common/archive.h"
#include "common/debug.h"
#include "common/stream.h"

#include "prince/font.h"
#include "prince/prince.h"

namespace Prince {

Font::Font() : _fontData(nullptr) {
}

Font::~Font() {
	if (_fontData != nullptr) {
		free(_fontData);
		_fontData = nullptr;
	}
}

bool Font::loadStream(Common::SeekableReadStream &stream) {
	stream.seek(0);
	uint32 dataSize = stream.size();
	_fontData = (byte *)malloc(dataSize);
	stream.read(_fontData, stream.size());
	return true;
}

int Font::getFontHeight() const {
	return _fontData[5];
}

int Font::getMaxCharWidth() const {
	return 0;
}

Font::ChrData Font::getChrData(byte chr) const {
	chr -= 32;
	uint16 chrOffset = 4 * chr + 6;

	ChrData chrData;
	chrData._width = _fontData[chrOffset + 2];
	chrData._height = _fontData[chrOffset + 3];
	chrData._pixels = _fontData + READ_LE_UINT16(_fontData + chrOffset);

	return chrData;
}

int Font::getCharWidth(uint32 chr) const {
	return getChrData(chr)._width;
}

void Font::drawChar(Graphics::Surface *dst, uint32 chr, int posX, int posY, uint32 color) const {
	const ChrData chrData = getChrData(chr);
	Common::Rect screenRect(0, 0, PrinceEngine::kNormalWidth, PrinceEngine::kNormalHeight);

	for (int y = 0; y < chrData._height; y++) {
		for (int x = 0; x < chrData._width; x++) {
			byte d = chrData._pixels[x + (chrData._width * y)];
			if (d == 0) d = 255;
			else if (d == 1) d = 0;
			else if (d == 2) d = color;
			else if (d == 3) d = 0;
			if (d != 255) {
				if (screenRect.contains(posX + x, posY + y)) {
					*(byte *)dst->getBasePtr(posX + x, posY + y) = d;
				}
			}
		}
	}
}

} // End of namespace Prince
