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.
 *
 * 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"
 
 
namespace KIFONT
{
 
constexpr int GLYPH_DEFAULT_DPI = 72; 
// 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;
 
 
class GLYPH
{
public:
 virtual ~GLYPH()
 {}
 
 virtual bool IsOutline() const { return false; }
 virtual bool IsStroke() const { return false; }
 
 virtual BOX2D BoundingBox() = 0;
};
 
 
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 )
 {}
 
 bool IsOutline() const override { return true; }
 
 BOX2D BoundingBox() override;
 
 void Triangulate( std::function<void( const VECTOR2I& aPt1,
 const VECTOR2I& aPt2,
 const VECTOR2I& aPt3 )> aCallback ) const;
};
 
 
class STROKE_GLYPH : public GLYPH, public std::vector<std::vector<VECTOR2D>>
{
public:
 STROKE_GLYPH()
 {}
 
 STROKE_GLYPH( const STROKE_GLYPH& aGlyph );
 
 bool IsStroke() const override { return true; }
 
 void AddPoint( const VECTOR2D& aPoint );
 void RaisePen();
 void Finalize();
 
 BOX2D BoundingBox() override { return m_boundingBox; }
 void SetBoundingBox( const BOX2D& bbox ) { m_boundingBox = bbox; }
 
 std::unique_ptr<GLYPH> Transform( const VECTOR2D& aGlyphSize, const VECTOR2I& aOffset,
 double aTilt, const EDA_ANGLE& aAngle, bool aMirror,
 const VECTOR2I& aOrigin );
 
private:
 bool m_penIsDown = false;
 BOX2D m_boundingBox;
};
 
 
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