1 /*
2  * LibrePCB - Professional EDA for everyone!
3  * Copyright (C) 2013 LibrePCB Developers, see AUTHORS.md for contributors.
4  * https://librepcb.org/
5  *
6  * This program 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 3 of the License, or
9  * (at your option) any later version.
10  *
11  * This program 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.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
18  */
19 
20 #ifndef LIBREPCB_STROKEFONT_H
21 #define LIBREPCB_STROKEFONT_H
22 
23 /*******************************************************************************
24  *  Includes
25  ******************************************************************************/
26 #include "../alignment.h"
27 #include "../fileio/filepath.h"
28 #include "../geometry/path.h"
29 
30 #include <QtCore>
31 
32 /*******************************************************************************
33  *  Namespace / Forward Declarations
34  ******************************************************************************/
35 namespace fontobene {
36 struct Vertex;
37 struct Polyline;
38 struct Font;
39 class GlyphListCache;
40 class GlyphListAccessor;
41 }  // namespace fontobene
42 
43 namespace librepcb {
44 
45 /*******************************************************************************
46  *  Class StrokeFont
47  ******************************************************************************/
48 
49 /**
50  * @brief The StrokeFont class
51  */
52 class StrokeFont final : public QObject {
53   Q_OBJECT
54 
55 public:
56   // Constructors / Destructor
57   StrokeFont(const FilePath& fontFilePath, const QByteArray& content) noexcept;
58   StrokeFont(const StrokeFont& other) = delete;
59   ~StrokeFont() noexcept;
60 
61   // Getters
62   Ratio getLetterSpacing() const noexcept;
63   Ratio getLineSpacing() const noexcept;
64 
65   // General Methods
66   QVector<Path> stroke(const QString& text, const PositiveLength& height,
67                        const Length& letterSpacing, const Length& lineSpacing,
68                        const Alignment& align, Point& bottomLeft,
69                        Point& topRight) const noexcept;
70   QVector<QPair<QVector<Path>, Length>> strokeLines(
71       const QString& text, const PositiveLength& height,
72       const Length& letterSpacing, Length& width) const noexcept;
73   QVector<Path> strokeLine(const QString& text, const PositiveLength& height,
74                            const Length& letterSpacing, Length& width) const
75       noexcept;
76   QVector<Path> strokeGlyph(const QChar& glyph, const PositiveLength& height,
77                             Length& spacing) const noexcept;
78 
79   // Operator Overloadings
80   StrokeFont& operator=(const StrokeFont& rhs) = delete;
81 
82 private:
83   void fontLoaded() noexcept;
84   const fontobene::GlyphListAccessor& accessor() const noexcept;
85   static QVector<Path> polylines2paths(
86       const QVector<fontobene::Polyline>& polylines,
87       const PositiveLength& height) noexcept;
88   static Path polyline2path(const fontobene::Polyline& p,
89                             const PositiveLength& height) noexcept;
90   static Vertex convertVertex(const fontobene::Vertex& v,
91                               const PositiveLength& height) noexcept;
92   Length convertLength(const PositiveLength& height, qreal length) const
93       noexcept;
94   static void computeBoundingRect(const QVector<Path>& paths, Point& bottomLeft,
95                                   Point& topRight) noexcept;
96 
97 private:  // Data
98   FilePath mFilePath;
99   QFuture<fontobene::Font> mFuture;
100   QFutureWatcher<fontobene::Font> mWatcher;
101   mutable QScopedPointer<fontobene::Font> mFont;
102   mutable QScopedPointer<fontobene::GlyphListCache> mGlyphListCache;
103   mutable QScopedPointer<fontobene::GlyphListAccessor> mGlyphListAccessor;
104 };
105 
106 /*******************************************************************************
107  *  End of File
108  ******************************************************************************/
109 
110 }  // namespace librepcb
111 
112 #endif  // LIBREPCB_STROKEFONT_H
113