stroke_font.h

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/*
 * This program source code file is part of KICAD, a free EDA CAD application.
 *
 * Copyright (C) 2012 Torsten Hueter, torstenhtr <at> gmx.de
 * Copyright (C) 2013 CERN
 * Copyright (C) 2016-2021 KiCad Developers, see AUTHORS.txt for contributors.
 *
 * @author Maciej Suminski <[email protected]>
 *
 * Stroke font class
 *
 * 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 STROKE_FONT_H_
#define STROKE_FONT_H_

#include <deque>
#include <algorithm>

#include <utf8.h>

#include <eda_text.h>

#include <math/box2.h>

namespace KIGFX
{
class GAL;

typedef std::vector<std::vector<VECTOR2D>*> GLYPH;
typedef std::vector<GLYPH*> GLYPH_LIST;

class STROKE_FONT
{
 friend class GAL;

public:
 STROKE_FONT( GAL* aGal );

 bool LoadNewStrokeFont( const char* const aNewStrokeFont[], int aNewStrokeFontSize );

 void Draw( const UTF8& aText, const VECTOR2D& aPosition, double aRotationAngle );

 void SetGAL( GAL* aGal )
 {
 m_gal = aGal;
 }

 VECTOR2D ComputeStringBoundaryLimits( const UTF8& aText, const VECTOR2D& aGlyphSize,
 double aGlyphThickness ) const;

 double ComputeOverbarVerticalPosition( double aGlyphHeight ) const;

 static double GetInterline( double aGlyphHeight );

private:
 VECTOR2D computeTextLineSize( const UTF8& aText ) const;

 double computeOverbarVerticalPosition() const;
 double computeUnderlineVerticalPosition() const;

 BOX2D computeBoundingBox( const GLYPH* aGlyph, double aGlyphWidth ) const;

 void drawSingleLineText( const UTF8& aText );

 inline unsigned linesCount( const UTF8& aText ) const
 {
 if( aText.empty() )
 return 0; // std::count does not work well with empty strings
 else
 // aText.end() - 1 is to skip a newline character that is potentially at the end
 return std::count( aText.begin(), aText.end() - 1, '\n' ) + 1;
 }

 GAL* m_gal; 
 const GLYPH_LIST* m_glyphs; 
 const std::vector<BOX2D>* m_glyphBoundingBoxes; 

 static const double OVERBAR_POSITION_FACTOR;
 static const double UNDERLINE_POSITION_FACTOR;

 static const double BOLD_FACTOR;

 static const double STROKE_FONT_SCALE;

 static const double ITALIC_TILT;

 static const double INTERLINE_PITCH_RATIO;
};
} // namespace KIGFX

#endif // STROKE_FONT_H_