1/*
2 * Copyright (C) 2013 Google, Inc.
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12 * Library General Public License for more details.
13 *
14 * You should have received a copy of the GNU Library General Public License
15 * along with this library; see the file COPYING.LIB.  If not, write to
16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
18 *
19 */
20
21#ifndef CustomFontData_h
22#define CustomFontData_h
23
24#include "platform/PlatformExport.h"
25#include "platform/fonts/Glyph.h"
26#include "wtf/PassRefPtr.h"
27#include "wtf/RefCounted.h"
28#include <unicode/uchar.h>
29
30namespace blink {
31
32struct GlyphData;
33class GlyphPage;
34class SimpleFontData;
35struct WidthIterator;
36
37class PLATFORM_EXPORT CustomFontData : public RefCounted<CustomFontData> {
38public:
39    static PassRefPtr<CustomFontData> create() { return adoptRef(new CustomFontData()); }
40
41    virtual ~CustomFontData() { }
42
43    virtual void beginLoadIfNeeded() const { };
44    virtual bool isLoading() const { return false; }
45    virtual bool isLoadingFallback() const { return false; }
46    virtual bool shouldSkipDrawing() const { return false; }
47    virtual void clearFontFaceSource() { }
48
49    virtual bool isSVGFont() const { return false; }
50    virtual void initializeFontData(SimpleFontData*, float) { }
51    virtual float widthForSVGGlyph(Glyph, float) const { return 0.0f; }
52    virtual bool fillSVGGlyphPage(GlyphPage*, unsigned, unsigned, UChar*, unsigned, const SimpleFontData*) const { return false; }
53    virtual bool applySVGGlyphSelection(WidthIterator&, GlyphData&, bool, int, unsigned&) const { return false; }
54
55protected:
56    CustomFontData() { }
57};
58
59#define DEFINE_CUSTOM_FONT_DATA_TYPE_CASTS(thisType, predicate) \
60    template<typename T> inline thisType* to##thisType(const RefPtr<T>& customFontData) { return to##thisType(customFontData.get()); } \
61    DEFINE_TYPE_CASTS(thisType, CustomFontData, customFontData, customFontData->predicate, customFontData.predicate)
62
63} // namespace blink
64
65#endif // CustomFontData_h
66