The Tor Browser: gfx/graphite2/src/inc/Font.h@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 /*  GRAPHITE2 LICENSING

     3     Copyright 2010, SIL International

     4     All rights reserved.

     6     This library is free software; you can redistribute it and/or modify

     7     it under the terms of the GNU Lesser General Public License as published

     8     by the Free Software Foundation; either version 2.1 of License, or

     9     (at your option) any later version.

    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 GNU

    14     Lesser General Public License for more details.

    16     You should also have received a copy of the GNU Lesser General Public

    17     License along with this library in the file named "LICENSE".

    18     If not, write to the Free Software Foundation, 51 Franklin Street,

    19     Suite 500, Boston, MA 02110-1335, USA or visit their web page on the

    20     internet at http://www.fsf.org/licenses/lgpl.html.

    22 Alternatively, the contents of this file may be used under the terms of the

    23 Mozilla Public License (http://mozilla.org/MPL) or the GNU General Public

    24 License, as published by the Free Software Foundation, either version 2

    25 of the License or (at your option) any later version.

    26 */

    27 #pragma once

    28 #include <cassert>

    29 #include "graphite2/Font.h"

    30 #include "inc/Main.h"

    31 #include "inc/Face.h"

    33 namespace graphite2 {

    35 #define INVALID_ADVANCE -1e38f      // can't be a static const because non-integral

    37 class Font

    38 {

    39 public:

    40     Font(float ppm, const Face & face, const void * appFontHandle=0, const gr_font_ops * ops=0);

    41     virtual ~Font();

    43     float advance(unsigned short glyphid) const;

    44     float scale() const;

    45     bool isHinted() const;

    46     const Face & face() const;

    48     CLASS_NEW_DELETE;

    49 private:

    50     gr_font_ops         m_ops;

    51     const void  * const m_appFontHandle;

    52     float             * m_advances;  // One advance per glyph in pixels. Nan if not defined

    53     const Face        & m_face;

    54     float               m_scale;      // scales from design units to ppm

    55     bool                m_hinted;

    57     Font(const Font&);

    58     Font& operator=(const Font&);

    59 };

    61 inline

    62 float Font::advance(unsigned short glyphid) const

    63 {

    64     if (m_advances[glyphid] == INVALID_ADVANCE)

    65         m_advances[glyphid] = (*m_ops.glyph_advance_x)(m_appFontHandle, glyphid);

    66     return m_advances[glyphid];

    67 }

    69 inline

    70 float Font::scale() const

    71 {

    72     return m_scale;

    73 }

    75 inline

    76 bool Font::isHinted() const

    77 {

    78     return m_hinted;

    79 }

    81 inline

    82 const Face & Font::face() const

    83 {

    84     return m_face;

    85 }

    87 } // namespace graphite2

    89 struct gr_font : public graphite2::Font {};

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