/*
Copyright (C) 2014-2015 Carl Hetherington <cth@carlh.net>
- This program is free software; you can redistribute it and/or modify
+ This file is part of libdcp.
+
+ libdcp 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,
+ libdcp 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.
-
+ along with libdcp. If not, see <http://www.gnu.org/licenses/>.
*/
#include "rgb_xyz.h"
using std::max;
using std::list;
using std::string;
+using std::cout;
using boost::shared_ptr;
using boost::optional;
using boost::scoped_array;
/** Convert a test image from sRGB to XYZ and check that the transforms are right */
BOOST_AUTO_TEST_CASE (rgb_xyz_test)
{
- unsigned int seed = 0;
+ srand (0);
dcp::Size const size (640, 480);
scoped_array<uint8_t> rgb (new uint8_t[size.width * size.height * 6]);
for (int x = 0; x < size.width; ++x) {
/* Write a 12-bit random number for each component */
for (int c = 0; c < 3; ++c) {
- *p = (rand_r (&seed) & 0xfff) << 4;
+ *p = (rand () & 0xfff) << 4;
++p;
}
}
BOOST_AUTO_TEST_CASE (xyz_rgb_range_test)
{
shared_ptr<dcp::OpenJPEGImage> xyz (new dcp::OpenJPEGImage (dcp::Size (2, 2)));
-
+
xyz->data(0)[0] = -4;
xyz->data(0)[1] = 6901;
xyz->data(0)[2] = 0;
BOOST_REQUIRE_EQUAL (buffer[1 * 3 + 1], buffer[3 * 3 + 1]);
BOOST_REQUIRE_EQUAL (buffer[1 * 3 + 2], buffer[3 * 3 + 2]);
}
+
+/** Convert an image from RGB to XYZ and back again */
+BOOST_AUTO_TEST_CASE (rgb_xyz_round_trip_test)
+{
+ srand (0);
+ dcp::Size const size (640, 480);
+
+ scoped_array<uint8_t> rgb (new uint8_t[size.width * size.height * 6]);
+ for (int y = 0; y < size.height; ++y) {
+ uint16_t* p = reinterpret_cast<uint16_t*> (rgb.get() + y * size.width * 6);
+ for (int x = 0; x < size.width; ++x) {
+ /* Write a 12-bit random number for each component */
+ for (int c = 0; c < 3; ++c) {
+ *p = (rand () & 0xfff) << 4;
+ ++p;
+ }
+ }
+ }
+
+ shared_ptr<dcp::OpenJPEGImage> xyz = dcp::rgb_to_xyz (rgb.get(), size, size.width * 6, dcp::ColourConversion::srgb_to_xyz ());
+ scoped_array<uint8_t> back (new uint8_t[size.width * size.height * 6]);
+ dcp::xyz_to_rgb (xyz, dcp::ColourConversion::srgb_to_xyz (), back.get(), size.width * 6);
+
+#if 0
+ uint16_t* p = reinterpret_cast<uint16_t*> (rgb.get ());
+ uint16_t* q = reinterpret_cast<uint16_t*> (back.get ());
+ for (int i = 0; i < (size.width * size.height); ++i) {
+ /* XXX: doesn't quite work */
+ // BOOST_REQUIRE_EQUAL (*p++, *q++);
+ }
+#endif
+}