kicad/include/font/glyph.h

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/*
* This program source code file is part of KICAD, a free EDA CAD application.
*
* Copyright (C) 2021 Ola Rinta-Koski
* Copyright (C) 2021-2022 Kicad Developers, see AUTHORS.txt for contributors.
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*
* This program is free software; you can redistribute it and/or
* modify it under the terms of 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.
*
* 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, you may find one here:
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
* or you may search the http://www.gnu.org website for the version 2 license,
* or you may write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#ifndef GLYPH_H
#define GLYPH_H
#include <memory>
#include <math/box2.h>
#include <geometry/shape_poly_set.h>
#include <wx/debug.h>
#include "../../libs/kimath/include/geometry/eda_angle.h"
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namespace KIFONT
{
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constexpr int GLYPH_DEFAULT_DPI = 72; ///< FreeType default
// The FreeType default of 72 DPI is not enough for outline decomposition;
// so we'll use something larger than that.
constexpr int GLYPH_RESOLUTION = 288;
constexpr double GLYPH_SIZE_SCALER = GLYPH_DEFAULT_DPI / (double) GLYPH_RESOLUTION;
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class GLYPH
{
public:
virtual ~GLYPH()
{}
virtual bool IsOutline() const { return false; }
virtual bool IsStroke() const { return false; }
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virtual BOX2D BoundingBox() = 0;
};
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class OUTLINE_GLYPH : public GLYPH, public SHAPE_POLY_SET
{
public:
OUTLINE_GLYPH() :
SHAPE_POLY_SET()
{}
OUTLINE_GLYPH( const OUTLINE_GLYPH& aGlyph ) :
SHAPE_POLY_SET( aGlyph )
{}
OUTLINE_GLYPH( const SHAPE_POLY_SET& aPoly ) :
SHAPE_POLY_SET( aPoly )
{}
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bool IsOutline() const override { return true; }
BOX2D BoundingBox() override;
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void Triangulate( std::function<void( const VECTOR2I& aPt1,
const VECTOR2I& aPt2,
const VECTOR2I& aPt3 )> aCallback ) const;
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};
class STROKE_GLYPH : public GLYPH, public std::vector<std::vector<VECTOR2D>>
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{
public:
STROKE_GLYPH()
{}
STROKE_GLYPH( const STROKE_GLYPH& aGlyph );
bool IsStroke() const override { return true; }
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void AddPoint( const VECTOR2D& aPoint );
void RaisePen();
void Finalize();
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BOX2D BoundingBox() override { return m_boundingBox; }
void SetBoundingBox( const BOX2D& bbox ) { m_boundingBox = bbox; }
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std::unique_ptr<GLYPH> Transform( const VECTOR2D& aGlyphSize, const VECTOR2I& aOffset,
double aTilt, const EDA_ANGLE& aAngle, bool aMirror,
const VECTOR2I& aOrigin );
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private:
bool m_penIsDown = false;
BOX2D m_boundingBox;
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};
typedef std::vector<VECTOR2D> GLYPH_POINTS;
typedef std::vector<GLYPH_POINTS> GLYPH_POINTS_LIST;
typedef std::vector<BOX2D> GLYPH_BOUNDING_BOX_LIST;
} // namespace KIFONT
#endif // GLYPH_H