2 Copyright (C) 2013-2015 Carl Hetherington <cth@carlh.net>
4 This file is part of DCP-o-matic.
6 DCP-o-matic is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 DCP-o-matic is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
21 #include "video_content_scale.h"
22 #include "video_content.h"
24 #include "safe_stringstream.h"
26 #include <libcxml/cxml.h>
27 #include <libxml++/libxml++.h>
28 #include <boost/optional.hpp>
37 using boost::shared_ptr;
38 using boost::optional;
40 vector<VideoContentScale> VideoContentScale::_scales;
42 VideoContentScale::VideoContentScale (Ratio const * r)
49 VideoContentScale::VideoContentScale ()
56 VideoContentScale::VideoContentScale (bool scale)
63 VideoContentScale::VideoContentScale (shared_ptr<cxml::Node> node)
67 optional<string> r = node->optional_string_child ("Ratio");
69 _ratio = Ratio::from_id (r.get ());
71 _scale = node->bool_child ("Scale");
76 VideoContentScale::as_xml (xmlpp::Node* node) const
79 node->add_child("Ratio")->add_child_text (_ratio->id ());
81 node->add_child("Scale")->add_child_text (_scale ? "1" : "0");
86 VideoContentScale::id () const
93 s << (_scale ? "S1" : "S0");
100 VideoContentScale::name () const
103 return _ratio->nickname ();
107 return _("No stretch");
110 return _("No scale");
114 VideoContentScale::from_id (string id)
116 Ratio const * r = Ratio::from_id (id);
118 return VideoContentScale (r);
122 return VideoContentScale (false);
125 return VideoContentScale (true);
128 /** @param display_container Size of the container that we are displaying this content in.
129 * @param film_container The size of the film's image.
132 VideoContentScale::size (shared_ptr<const VideoContent> c, dcp::Size display_container, dcp::Size film_container) const
134 /* Work out the size of the content if it were put inside film_container */
136 dcp::Size const video_size_after_crop = c->size_after_crop ();
141 /* Stretch to fit the requested ratio */
142 size = fit_ratio_within (_ratio->ratio (), film_container);
143 } else if (_scale || video_size_after_crop.width > film_container.width || video_size_after_crop.height > film_container.height) {
144 /* Scale, preserving aspect ratio; this is either if we have been asked to scale with no stretch
145 or if the unscaled content is too big for film_container.
147 size = fit_ratio_within (video_size_after_crop.ratio(), film_container);
149 /* No stretch nor scale */
150 size = video_size_after_crop;
153 /* Now scale it down if the display container is smaller than the film container */
154 if (display_container != film_container) {
155 float const scale = min (
156 float (display_container.width) / film_container.width,
157 float (display_container.height) / film_container.height
160 size.width = lrintf (size.width * scale);
161 size.height = lrintf (size.height * scale);
168 VideoContentScale::setup_scales ()
170 vector<Ratio const *> ratios = Ratio::all ();
171 for (vector<Ratio const *>::const_iterator i = ratios.begin(); i != ratios.end(); ++i) {
172 _scales.push_back (VideoContentScale (*i));
175 _scales.push_back (VideoContentScale (true));
176 _scales.push_back (VideoContentScale (false));
180 operator== (VideoContentScale const & a, VideoContentScale const & b)
182 return (a.ratio() == b.ratio() && a.scale() == b.scale());
186 operator!= (VideoContentScale const & a, VideoContentScale const & b)
188 return (a.ratio() != b.ratio() || a.scale() != b.scale());