/*
	Copyright (C) 2012  fmaj7b5.info

	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 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/>.
*/

// binarize.cpp : コンソール アプリケーションのエントリ ポイントを定義します。
//

#include "stdafx.h"

#include "Image.h"
#include "ImageIO.h"

#include "binarize.h"

using namespace FM7b5;

static void binarize_cpu(ImageGray& out, const ImageGray& in, const uint_fast8_t thres = 128);

int _tmain(int argc, _TCHAR* argv[])
{
	try {
		const uint_fast8_t thres(128);
		ImageGray image;

		image = loadPGM("..\\img\\sine.pgm");

		ImageGray out(image.width(), image.height());
		binarize_cpu(out, image, thres);
		savePNM(out, "result_cpu.pgm");

		ImageGray out_gpu(image.width(), image.height());
		binarize_gpu(out_gpu, image, thres);
		savePNM(out_gpu, "result_gpu.pgm");
	}
	catch (std::exception& e)
	{
		std::cout << e.what() << std::endl;
		return -1;
	}

	return 0;
}

void
binarize_cpu(ImageGray& out, const ImageGray& in, const uint_fast8_t thres)
{
	if (in.width() != out.width() || in.height() != out.height()) {
		throw std::runtime_error("sizes of input and output images are diferent.");
	}

	for (size_t h = 0; h < in.height(); ++h) {
		for (size_t w = 0; w < in.width(); ++w) {
			out(w, h) = (in(w, h) < thres) ? 0 : 255;
		}
	}
}