[Complex Text Layouts] Add third-party TextServer dependencies (ICU, HarfBuzz, Graphite).

thirdparty/graphite/src/inc/Font.h

@@ -0,0 +1,90 @@
+/*  GRAPHITE2 LICENSING
+
+    Copyright 2010, SIL International
+    All rights reserved.
+
+    This library is free software; you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published
+    by the Free Software Foundation; either version 2.1 of 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
+    Lesser General Public License for more details.
+
+    You should also have received a copy of the GNU Lesser General Public
+    License along with this library in the file named "LICENSE".
+    If not, write to the Free Software Foundation, 51 Franklin Street,
+    Suite 500, Boston, MA 02110-1335, USA or visit their web page on the
+    internet at http://www.fsf.org/licenses/lgpl.html.
+
+Alternatively, the contents of this file may be used under the terms of the
+Mozilla Public License (http://mozilla.org/MPL) or 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.
+*/
+#pragma once
+#include <cassert>
+#include "graphite2/Font.h"
+#include "inc/Main.h"
+#include "inc/Face.h"
+
+namespace graphite2 {
+
+#define INVALID_ADVANCE -1e38f      // can't be a static const because non-integral
+
+class Font
+{
+public:
+    Font(float ppm, const Face & face, const void * appFontHandle=0, const gr_font_ops * ops=0);
+    virtual ~Font();
+
+    float advance(unsigned short glyphid) const;
+    float scale() const;
+    bool isHinted() const;
+    const Face & face() const;
+    operator bool () const throw()  { return m_advances; }
+
+    CLASS_NEW_DELETE;
+private:
+    gr_font_ops         m_ops;
+    const void  * const m_appFontHandle;
+    float             * m_advances;  // One advance per glyph in pixels. Nan if not defined
+    const Face        & m_face;
+    float               m_scale;      // scales from design units to ppm
+    bool                m_hinted;
+
+    Font(const Font&);
+    Font& operator=(const Font&);
+};
+
+inline
+float Font::advance(unsigned short glyphid) const
+{
+    if (m_advances[glyphid] == INVALID_ADVANCE)
+        m_advances[glyphid] = (*m_ops.glyph_advance_x)(m_appFontHandle, glyphid);
+    return m_advances[glyphid];
+}
+
+inline
+float Font::scale() const
+{
+    return m_scale;
+}
+
+inline
+bool Font::isHinted() const
+{
+    return m_hinted;
+}
+
+inline
+const Face & Font::face() const
+{
+    return m_face;
+}
+
+} // namespace graphite2
+
+struct gr_font : public graphite2::Font {};