2 Copyright (C) 2012-2021 Carl Hetherington <cth@carlh.net>
4 This file is part of libdcp.
6 libdcp 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 libdcp 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 libdcp. If not, see <http://www.gnu.org/licenses/>.
19 In addition, as a special exception, the copyright holders give
20 permission to link the code of portions of this program with the
21 OpenSSL library under certain conditions as described in each
22 individual source file, and distribute linked combinations
25 You must obey the GNU General Public License in all respects
26 for all of the code used other than OpenSSL. If you modify
27 file(s) with this exception, you may extend this exception to your
28 version of the file(s), but you are not obligated to do so. If you
29 do not wish to do so, delete this exception statement from your
30 version. If you delete this exception statement from all source
31 files in the program, then also delete it here.
35 /** @file src/subtitle_string.h
36 * @brief SubtitleString class
40 #ifndef LIBDCP_SUBTITLE_STRING_H
41 #define LIBDCP_SUBTITLE_STRING_H
47 #include <boost/optional.hpp>
54 /** @class SubtitleString
55 * @brief A single line of subtitle text with all the associated attributes.
57 class SubtitleString : public Subtitle
60 /** @param font Font ID, or empty to use the default
61 * @param italic true for italic text
62 * @param bold true for bold text
63 * @param underline true for underlined text
64 * @param colour Colour of the text
65 * @param size Size in points as if the screen height is 11 inches, so a 72pt font would be 1/11th of the screen height
66 * @param aspect_adjust greater than 1 to stretch text to be wider, less than 1 to shrink text to be narrower (must be between 0.25 and 4)
67 * @param in start time
68 * @param out finish time
69 * @param h_position Horizontal position as a fraction of the screen width (between 0 and 1) from h_align
70 * @param h_align Horizontal alignment point
71 * @param v_position Vertical position as a fraction of the screen height (between 0 and 1) from v_align
72 * @param v_align Vertical alignment point
73 * @param z_position Z position as a proportion of the primary picture width between -1 and +1;
74 * +ve moves the image away from the viewer, -ve moves it toward the viewer, 0 is in the plane of the screen.
75 * @param direction Direction of text
76 * @param text The text to display
77 * @param effect Effect to use
78 * @param effect_colour Colour of the effect
79 * @param fade_up_time Time to fade the text in
80 * @param fade_down_time Time to fade the text out
81 * @param space_before Space to add before this string, in ems (could be negative to remove space).
84 boost::optional<std::string> font,
101 Colour effect_colour,
107 /** @return font ID */
108 boost::optional<std::string> font () const {
112 bool italic () const {
120 bool underline () const {
124 Colour colour () const {
128 std::string text () const {
132 Direction direction () const {
136 Effect effect () const {
140 Colour effect_colour () const {
141 return _effect_colour;
148 float size_in_pixels (int screen_height) const;
150 float space_before () const {
151 return _space_before;
154 /** @return Aspect ratio `adjustment' of the font size.
155 * Values greater than 1 widen each character, values less than 1 narrow each character,
156 * and the value must be between 0.25 and 4.
158 float aspect_adjust () const {
159 return _aspect_adjust;
162 void set_font (std::string id) {
167 _font = boost::optional<std::string>();
170 void set_size (int s) {
174 void set_aspect_adjust (float a) {
178 void set_text (std::string t) {
182 void set_colour (Colour c) {
186 void set_effect (Effect e) {
190 void set_effect_colour (Colour c) {
194 bool equals(std::shared_ptr<const dcp::Subtitle> other_sub, EqualityOptions const& options, NoteHandler node) const override;
198 boost::optional<std::string> _font;
199 /** true if the text is italic */
201 /** true if the weight is bold, false for normal */
203 /** true to enable underlining, false otherwise */
207 /** Size in points as if the screen height is 11 inches, so a 72pt font
208 * would be 1/11th of the screen height.
211 float _aspect_adjust;
212 Direction _direction;
215 Colour _effect_colour;
219 bool operator== (SubtitleString const & a, SubtitleString const & b);
220 bool operator!= (SubtitleString const & a, SubtitleString const & b);
221 std::ostream& operator<< (std::ostream& s, SubtitleString const & sub);