/*
    Copyright (C) 2012 Carl Hetherington <cth@carlh.net>

    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, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#include <boost/test/unit_test.hpp>
#include "lib/image.h"
#include "lib/scaler.h"

using boost::shared_ptr;

BOOST_AUTO_TEST_CASE (aligned_image_test)
{
	Image* s = new Image (PIX_FMT_RGB24, libdcp::Size (50, 50), true);
	BOOST_CHECK_EQUAL (s->components(), 1);
	/* 160 is 150 aligned to the nearest 32 bytes */
	BOOST_CHECK_EQUAL (s->stride()[0], 160);
	BOOST_CHECK_EQUAL (s->line_size()[0], 150);
	BOOST_CHECK (s->data()[0]);
	BOOST_CHECK (!s->data()[1]);
	BOOST_CHECK (!s->data()[2]);
	BOOST_CHECK (!s->data()[3]);

	/* copy constructor */
	Image* t = new Image (*s);
	BOOST_CHECK_EQUAL (t->components(), 1);
	BOOST_CHECK_EQUAL (t->stride()[0], 160);
	BOOST_CHECK_EQUAL (t->line_size()[0], 150);
	BOOST_CHECK (t->data()[0]);
	BOOST_CHECK (!t->data()[1]);
	BOOST_CHECK (!t->data()[2]);
	BOOST_CHECK (!t->data()[3]);
	BOOST_CHECK (t->data() != s->data());
	BOOST_CHECK (t->data()[0] != s->data()[0]);
	BOOST_CHECK (t->line_size() != s->line_size());
	BOOST_CHECK (t->line_size()[0] == s->line_size()[0]);
	BOOST_CHECK (t->stride() != s->stride());
	BOOST_CHECK (t->stride()[0] == s->stride()[0]);

	/* assignment operator */
	Image* u = new Image (PIX_FMT_YUV422P, libdcp::Size (150, 150), false);
	*u = *s;
	BOOST_CHECK_EQUAL (u->components(), 1);
	BOOST_CHECK_EQUAL (u->stride()[0], 160);
	BOOST_CHECK_EQUAL (u->line_size()[0], 150);
	BOOST_CHECK (u->data()[0]);
	BOOST_CHECK (!u->data()[1]);
	BOOST_CHECK (!u->data()[2]);
	BOOST_CHECK (!u->data()[3]);
	BOOST_CHECK (u->data() != s->data());
	BOOST_CHECK (u->data()[0] != s->data()[0]);
	BOOST_CHECK (u->line_size() != s->line_size());
	BOOST_CHECK (u->line_size()[0] == s->line_size()[0]);
	BOOST_CHECK (u->stride() != s->stride());
	BOOST_CHECK (u->stride()[0] == s->stride()[0]);

	delete s;
	delete t;
	delete u;
}

BOOST_AUTO_TEST_CASE (compact_image_test)
{
	Image* s = new Image (PIX_FMT_RGB24, libdcp::Size (50, 50), false);
	BOOST_CHECK_EQUAL (s->components(), 1);
	BOOST_CHECK_EQUAL (s->stride()[0], 50 * 3);
	BOOST_CHECK_EQUAL (s->line_size()[0], 50 * 3);
	BOOST_CHECK (s->data()[0]);
	BOOST_CHECK (!s->data()[1]);
	BOOST_CHECK (!s->data()[2]);
	BOOST_CHECK (!s->data()[3]);

	/* copy constructor */
	Image* t = new Image (*s);
	BOOST_CHECK_EQUAL (t->components(), 1);
	BOOST_CHECK_EQUAL (t->stride()[0], 50 * 3);
	BOOST_CHECK_EQUAL (t->line_size()[0], 50 * 3);
	BOOST_CHECK (t->data()[0]);
	BOOST_CHECK (!t->data()[1]);
	BOOST_CHECK (!t->data()[2]);
	BOOST_CHECK (!t->data()[3]);
	BOOST_CHECK (t->data() != s->data());
	BOOST_CHECK (t->data()[0] != s->data()[0]);
	BOOST_CHECK (t->line_size() != s->line_size());
	BOOST_CHECK (t->line_size()[0] == s->line_size()[0]);
	BOOST_CHECK (t->stride() != s->stride());
	BOOST_CHECK (t->stride()[0] == s->stride()[0]);

	/* assignment operator */
	Image* u = new Image (PIX_FMT_YUV422P, libdcp::Size (150, 150), true);
	*u = *s;
	BOOST_CHECK_EQUAL (u->components(), 1);
	BOOST_CHECK_EQUAL (u->stride()[0], 50 * 3);
	BOOST_CHECK_EQUAL (u->line_size()[0], 50 * 3);
	BOOST_CHECK (u->data()[0]);
	BOOST_CHECK (!u->data()[1]);
	BOOST_CHECK (!u->data()[2]);
	BOOST_CHECK (!u->data()[3]);
	BOOST_CHECK (u->data() != s->data());
	BOOST_CHECK (u->data()[0] != s->data()[0]);
	BOOST_CHECK (u->line_size() != s->line_size());
	BOOST_CHECK (u->line_size()[0] == s->line_size()[0]);
	BOOST_CHECK (u->stride() != s->stride());
	BOOST_CHECK (u->stride()[0] == s->stride()[0]);

	delete s;
	delete t;
	delete u;
}

BOOST_AUTO_TEST_CASE (crop_image_test)
{
	/* This was to check out a bug with valgrind, and is probably not very useful */
	shared_ptr<Image> image (new Image (PIX_FMT_YUV420P, libdcp::Size (16, 16), true));
	image->make_black ();
	Crop crop;
	crop.top = 3;
	image->crop (crop, false);
}

/* Test cropping of a YUV 4:2:0 image by 1 pixel, which used to fail because
   the U/V copying was not rounded up to the next sample.
*/
BOOST_AUTO_TEST_CASE (crop_image_test2)
{
	/* Here's a 1998 x 1080 image which is black */
	shared_ptr<Image> image (new Image (PIX_FMT_YUV420P, libdcp::Size (1998, 1080), true));
	image->make_black ();

	/* Crop it by 1 pixel */
	Crop crop;
	crop.left = 1;
	image = image->crop (crop, true);

	/* Convert it back to RGB to make comparison to black easier */
	image = image->scale_and_convert_to_rgb (image->size(), Scaler::from_id ("bicubic"), true);

	/* Check that its still black after the crop */
	uint8_t* p = image->data()[0];
	for (int y = 0; y < image->size().height; ++y) {
		uint8_t* q = p;
		for (int x = 0; x < image->size().width; ++x) {
			BOOST_CHECK_EQUAL (*q++, 0);
			BOOST_CHECK_EQUAL (*q++, 0);
			BOOST_CHECK_EQUAL (*q++, 0);
		}
		p += image->stride()[0];
	}
}