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// SPDX-License-Identifier: MIT OR MPL-2.0 OR LGPL-2.1-or-later OR GPL-2.0-or-later
// Copyright 2010, SIL International, All rights reserved.
#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 {};
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