Home | History | Annotate | Download | only in graphics 
      1 /*
      2  * Copyright (C) 2007 Eric Seidel <eric (at) webkit.org>
      3  * Copyright (C) 2007 Nikolas Zimmermann <zimmermann (at) kde.org>
      4  * Copyright (C) 2008 Rob Buis <buis (at) kde.org>
      5  * Copyright (C) Research In Motion Limited 2011. All rights reserved.
      6  *
      7  * This library is free software; you can redistribute it and/or
      8  * modify it under the terms of the GNU Library General Public
      9  * License as published by the Free Software Foundation; either
     10  * version 2 of the License, or (at your option) any later version.
     11  *
     12  * This library is distributed in the hope that it will be useful,
     13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     15  * Library General Public License for more details.
     16  *
     17  * You should have received a copy of the GNU Library General Public License
     18  * along with this library; see the file COPYING.LIB.  If not, write to
     19  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     20  * Boston, MA 02110-1301, USA.
     21  */
     22 
     23 #ifndef SVGGlyph_h
     24 #define SVGGlyph_h
     25 
     26 #if ENABLE(SVG_FONTS)
     27 #include "core/platform/graphics/Glyph.h"
     28 #include "core/platform/graphics/Path.h"
     29 
     30 #include <limits>
     31 #include "wtf/text/WTFString.h"
     32 #include "wtf/Vector.h"
     33 
     34 namespace WebCore {
     35 
     36 // Describe a glyph from a SVG Font.
     37 struct SVGGlyph {
     38     enum Orientation {
     39         Vertical,
     40         Horizontal,
     41         Both
     42     };
     43 
     44     // SVG Font depends on exactly this order.
     45     enum ArabicForm {
     46         None = 0,
     47         Isolated,
     48         Terminal,
     49         Initial,
     50         Medial
     51     };
     52 
     53     SVGGlyph()
     54         : isPartOfLigature(false)
     55         , orientation(Both)
     56         , arabicForm(None)
     57         , priority(0)
     58         , tableEntry(0)
     59         , unicodeStringLength(0)
     60         , horizontalAdvanceX(0)
     61         , verticalOriginX(0)
     62         , verticalOriginY(0)
     63         , verticalAdvanceY(0)
     64     {
     65     }
     66 
     67     // Used to mark our float properties as "to be inherited from SVGFontData"
     68     static float inheritedValue()
     69     {
     70         static float s_inheritedValue = std::numeric_limits<float>::infinity();
     71         return s_inheritedValue;
     72     }
     73 
     74     bool operator==(const SVGGlyph& other) const
     75     {
     76         return isPartOfLigature == other.isPartOfLigature
     77             && orientation == other.orientation
     78             && arabicForm == other.arabicForm
     79             && tableEntry == other.tableEntry
     80             && unicodeStringLength == other.unicodeStringLength
     81             && glyphName == other.glyphName
     82             && horizontalAdvanceX == other.horizontalAdvanceX
     83             && verticalOriginX == other.verticalOriginX
     84             && verticalOriginY == other.verticalOriginY
     85             && verticalAdvanceY == other.verticalAdvanceY
     86             && languages == other.languages;
     87     }
     88 
     89     bool isPartOfLigature : 1;
     90 
     91     unsigned orientation : 2; // Orientation
     92     unsigned arabicForm : 3; // ArabicForm
     93     int priority;
     94     Glyph tableEntry;
     95     size_t unicodeStringLength;
     96     String glyphName;
     97 
     98     float horizontalAdvanceX;
     99     float verticalOriginX;
    100     float verticalOriginY;
    101     float verticalAdvanceY;
    102 
    103     Path pathData;
    104     Vector<String> languages;
    105 };
    106 
    107 Vector<SVGGlyph::ArabicForm> charactersWithArabicForm(const String& input, bool rtl);
    108 bool isCompatibleGlyph(const SVGGlyph&, bool isVerticalText, const String& language, const Vector<SVGGlyph::ArabicForm>&, unsigned startPosition, unsigned endPosition);
    109 
    110 } // namespace WebCore
    111 
    112 #endif // ENABLE(SVG_FONTS)
    113 #endif
    114