204 lines
6.6 KiB
C++
204 lines
6.6 KiB
C++
/*
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* This program source code file is part of KICAD, a free EDA CAD application.
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*
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* Copyright (C) 2012 Torsten Hueter, torstenhtr <at> gmx.de
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* Copyright (C) 2013 CERN
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* @author Maciej Suminski <maciej.suminski@cern.ch>
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* Copyright (C) 2016 Kicad Developers, see change_log.txt for contributors.
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*
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* Stroke font class
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, you may find one here:
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* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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* or you may search the http://www.gnu.org website for the version 2 license,
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* or you may write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#ifndef STROKE_FONT_H_
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#define STROKE_FONT_H_
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#include <deque>
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#include <utf8.h>
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#include <eda_text.h>
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#include <math/box2.h>
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namespace KIGFX
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{
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class GAL;
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typedef std::deque< std::deque<VECTOR2D> > GLYPH;
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typedef std::vector<GLYPH> GLYPH_LIST;
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/**
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* @brief Class STROKE_FONT implements stroke font drawing.
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*
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* A stroke font is composed of lines.
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*/
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class STROKE_FONT
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{
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friend class GAL;
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public:
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/// Constructor
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STROKE_FONT( GAL* aGal );
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/**
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* @brief Load the new stroke font.
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*
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* @param aNewStrokeFont is the pointer to the font data.
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* @param aNewStrokeFontSize is the size of the font data.
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* @return True, if the font was successfully loaded, else false.
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*/
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bool LoadNewStrokeFont( const char* const aNewStrokeFont[], int aNewStrokeFontSize );
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/**
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* @brief Draw a string.
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*
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* @param aText is the text to be drawn.
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* @param aPosition is the text position in world coordinates.
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* @param aRotationAngle is the text rotation angle.
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*/
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void Draw( const UTF8& aText, const VECTOR2D& aPosition, double aRotationAngle );
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/**
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* Function SetGAL
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* Changes Graphics Abstraction Layer used for drawing items for a new one.
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* @param aGal is the new GAL instance.
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*/
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void SetGAL( GAL* aGal )
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{
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m_gal = aGal;
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}
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/**
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* Compute the boundary limits of aText (the bbox of all shapes).
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* The overbar is not taken in account, by ~ are skipped.
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* @return a VECTOR2D giving the h size of line, and the V glyph size
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* and ( if aTopLimit or aBottomLimit not NULL ) the top and bottom
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* limits of the text.
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*/
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VECTOR2D ComputeStringBoundaryLimits( const UTF8& aText, VECTOR2D aGlyphSize,
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double aGlyphThickness,
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double* aTopLimit = NULL, double* aBottomLimit = NULL ) const;
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/**
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* @brief Compute the X and Y size of a given text. The text is expected to be
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* a only one line text.
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*
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* @param aText is the text string (one line).
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* @return the text size.
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*/
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VECTOR2D ComputeTextLineSize( const UTF8& aText ) const;
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/**
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* Compute the vertical position of an overbar, sometimes used in texts.
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* This is the distance between the text base line and the overbar.
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* @return the relative position of the overbar axis.
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*/
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double ComputeOverbarVerticalPosition( double aGlyphHeight, double aGlyphThickness ) const;
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/**
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* @brief Compute the X and Y size of a given text. The text is expected to be
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* a only one line text.
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*
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* @param aText is the text string (one line).
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* @return the text size.
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*/
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static double GetInterline( double aGlyphHeight, double aGlyphThickness );
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private:
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GAL* m_gal; ///< Pointer to the GAL
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GLYPH_LIST m_glyphs; ///< Glyph list
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std::vector<BOX2D> m_glyphBoundingBoxes; ///< Bounding boxes of the glyphs
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/**
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* @brief Compute the X and Y size of a given text. The text is expected to be
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* a only one line text.
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*
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* @param aText is the text string (one line).
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* @return the text size.
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*/
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VECTOR2D computeTextLineSize( const UTF8& aText ) const;
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/**
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* Compute the vertical position of an overbar, sometimes used in texts.
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* This is the distance between the text base line and the overbar.
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* @return the relative position of the overbar axis.
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*/
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double computeOverbarVerticalPosition() const;
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/**
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* @brief Returns a single line height using current settings.
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*
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* @return The line height.
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*/
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int getInterline() const;
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/**
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* @brief Compute the bounding box of a given glyph.
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*
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* @param aGlyph is the glyph.
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* @param aGlyphBoundingX is the x-component of the bounding box size.
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* @return is the complete bounding box size.
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*/
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BOX2D computeBoundingBox( const GLYPH& aGlyph, const VECTOR2D& aGlyphBoundingX ) const;
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/**
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* @brief Draws a single line of text. Multiline texts should be split before using the
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* function.
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*
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* @param aText is the text to be drawn.
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*/
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void drawSingleLineText( const UTF8& aText );
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/**
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* @brief Returns number of lines for a given text.
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*
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* @param aText is the text to be checked.
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* @return unsigned - The number of lines in aText.
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*/
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inline unsigned linesCount( const UTF8& aText ) const
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{
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if( aText.empty() )
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return 0; // std::count does not work well with empty strings
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else
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// aText.end() - 1 is to skip a newline character that is potentially at the end
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return std::count( aText.begin(), aText.end() - 1, '\n' ) + 1;
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}
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///> Factor that determines relative vertical position of the overbar.
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static const double OVERBAR_POSITION_FACTOR;
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///> Factor that determines relative line width for bold text.
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static const double BOLD_FACTOR;
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///> Scale factor for a glyph
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static const double STROKE_FONT_SCALE;
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///> Tilt factor for italic style (the is is the scaling factor
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///> on dY relative coordinates to give a tilst shape
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static const double ITALIC_TILT;
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///> Factor that determines the pitch between 2 lines.
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static const double INTERLINE_PITCH_RATIO;
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};
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} // namespace KIGFX
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#endif // STROKE_FONT_H_
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