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kicad/common/gr_text.cpp

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/**
* Functions to draw and plot text on screen
* @file draw_graphic_text.cpp
*/
/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2018 Jean-Pierre Charras, jp.charras at wanadoo.fr
* Copyright (C) 2012 SoftPLC Corporation, Dick Hollenbeck <dick@softplc.com>
* Copyright (C) 2012 Wayne Stambaugh <stambaughw@verizon.net>
* Copyright (C) 1992-2018 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
*/
#include <fctsys.h>
#include <gr_basic.h>
#include <common.h>
#include <plotter.h>
#include <eda_text.h> // EDA_TEXT_HJUSTIFY_T and EDA_TEXT_VJUSTIFY_T
#include <trigo.h>
#include <macros.h>
#include <base_screen.h>
#include <gr_text.h>
#include <basic_gal.h>
/**
* Function GetPensizeForBold
* @return the "best" value for a pen size to draw/plot a bold text
* @param aTextSize = the char size (height or width)
*/
int GetPenSizeForBold( int aTextSize )
{
return KiROUND( aTextSize / 5.0 );
}
/**
* Function Clamp_Text_PenSize
* Don't allow text to become cluttered up in its own fatness. Bold fonts are generally around
* aSize/5 in width, so we limit them to aSize/4, and normal text to aSize/6.
* @param aPenSize = the pen size to clamp
* @param aSize the char size (height or width)
* @param aBold = true if text accept bold pen size
* @return the max pen size allowed
*/
int Clamp_Text_PenSize( int aPenSize, int aSize, bool aBold )
{
double scale = aBold ? 4.0 : 6.0;
int maxWidth = KiROUND( (double) aSize / scale );
return std::min( aPenSize, maxWidth );
}
float Clamp_Text_PenSize( float aPenSize, int aSize, bool aBold )
{
float scale = aBold ? 4.0 : 6.0;
float maxWidth = (float) aSize / scale;
return std::min( aPenSize, maxWidth );
}
int Clamp_Text_PenSize( int aPenSize, wxSize aSize, bool aBold )
{
int size = std::min( std::abs( aSize.x ), std::abs( aSize.y ) );
return Clamp_Text_PenSize( aPenSize, size, aBold );
}
int GraphicTextWidth( const wxString& aText, const wxSize& aSize, bool aItalic, bool aBold )
{
basic_gal.SetFontItalic( aItalic );
basic_gal.SetFontBold( aBold );
basic_gal.SetGlyphSize( VECTOR2D( aSize ) );
VECTOR2D tsize = basic_gal.GetTextLineSize( aText );
return KiROUND( tsize.x );
}
/**
* Function GRText
* Draw a graphic text (like module texts)
* @param aDC = the current Device Context. NULL if draw within a 3D GL Canvas
* @param aPos = text position (according to h_justify, v_justify)
* @param aColor (COLOR4D) = text color
* @param aText = text to draw
* @param aOrient = angle in 0.1 degree
* @param aSize = text size (size.x or size.y can be < 0 for mirrored texts)
* @param aH_justify = horizontal justification (Left, center, right)
* @param aV_justify = vertical justification (bottom, center, top)
* @param aWidth = line width (pen width) (use default width if aWidth = 0)
* if width < 0 : draw segments in sketch mode, width = abs(width)
* Use a value min(aSize.x, aSize.y) / 5 for a bold text
* @param aItalic = true to simulate an italic font
* @param aBold = true to use a bold font. Useful only with default width value (aWidth = 0)
* @param aCallback( int x0, int y0, int xf, int yf, void* aData ) is a function called
* (if non null) to draw each segment. used to draw 3D texts or for plotting.
* NULL for normal drawings
* @param aCallbackData = is the auxiliary parameter aData for the callback function.
* can be nullptr if no auxiliary parameter is needed
* @param aPlotter = a pointer to a PLOTTER instance, when this function is used to plot
* the text. NULL to draw this text.
*/
void GRText( wxDC* aDC, const wxPoint& aPos, COLOR4D aColor, const wxString& aText,
double aOrient, const wxSize& aSize, enum EDA_TEXT_HJUSTIFY_T aH_justify,
enum EDA_TEXT_VJUSTIFY_T aV_justify, int aWidth, bool aItalic, bool aBold,
void (* aCallback)( int x0, int y0, int xf, int yf, void* aData ),
void* aCallbackData, PLOTTER* aPlotter )
{
bool fill_mode = true;
if( aWidth == 0 && aBold ) // Use default values if aWidth == 0
aWidth = GetPenSizeForBold( std::min( aSize.x, aSize.y ) );
if( aWidth < 0 )
{
aWidth = -aWidth;
fill_mode = false;
}
basic_gal.SetIsFill( fill_mode );
basic_gal.SetLineWidth( aWidth );
EDA_TEXT dummy;
dummy.SetItalic( aItalic );
dummy.SetBold( aBold );
dummy.SetHorizJustify( aH_justify );
dummy.SetVertJustify( aV_justify );
wxSize size = aSize;
dummy.SetMirrored( size.x < 0 );
if( size.x < 0 )
size.x = - size.x;
dummy.SetTextSize( size );
basic_gal.SetTextAttributes( &dummy );
basic_gal.SetPlotter( aPlotter );
basic_gal.SetCallback( aCallback, aCallbackData );
basic_gal.m_DC = aDC;
basic_gal.m_Color = aColor;
basic_gal.SetClipBox( nullptr );
basic_gal.StrokeText( aText, VECTOR2D( aPos ), aOrient * M_PI/1800 );
}
void GRHaloText( wxDC * aDC, const wxPoint &aPos, const COLOR4D aBgColor, COLOR4D aColor1,
COLOR4D aColor2, const wxString &aText, double aOrient, const wxSize &aSize,
enum EDA_TEXT_HJUSTIFY_T aH_justify, enum EDA_TEXT_VJUSTIFY_T aV_justify,
int aWidth, bool aItalic, bool aBold,
void (*aCallback)( int x0, int y0, int xf, int yf, void* aData ),
void* aCallbackData, PLOTTER * aPlotter )
{
// Swap color if contrast would be better
// TODO: Maybe calculate contrast some way other than brightness
if( aBgColor.GetBrightness() > 0.5 )
{
COLOR4D c = aColor1;
aColor1 = aColor2;
aColor2 = c;
}
// Draw the background
GRText( aDC, aPos, aColor1, aText, aOrient, aSize, aH_justify, aV_justify, aWidth, aItalic,
aBold, aCallback, aCallbackData, aPlotter );
// Draw the text
GRText( aDC, aPos, aColor2, aText, aOrient, aSize, aH_justify, aV_justify, aWidth/4, aItalic,
aBold, aCallback, aCallbackData, aPlotter );
}
/**
* Function PLOTTER::Text
* same as GRText, but plot graphic text insteed of draw it
* @param aPos = text position (according to aH_justify, aV_justify)
* @param aColor (COLOR4D) = text color
* @param aText = text to draw
* @param aOrient = angle in 0.1 degree
* @param aSize = text size (size.x or size.y can be < 0 for mirrored texts)
* @param aH_justify = horizontal justification (Left, center, right)
* @param aV_justify = vertical justification (bottom, center, top)
* @param aWidth = line width (pen width) (default = 0)
* if width < 0 : draw segments in sketch mode, width = abs(width)
* Use a value min(aSize.x, aSize.y) / 5 for a bold text
* @param aItalic = true to simulate an italic font
* @param aBold = true to use a bold font Useful only with default width value (aWidth = 0)
* @param aMultilineAllowed = true to plot text as multiline, otherwise single line
* @param aData = a parameter used by some plotters in SetCurrentLineWidth(),
* not directly used here.
*/
void PLOTTER::Text( const wxPoint& aPos,
const COLOR4D aColor,
const wxString& aText,
double aOrient,
const wxSize& aSize,
enum EDA_TEXT_HJUSTIFY_T aH_justify,
enum EDA_TEXT_VJUSTIFY_T aV_justify,
int aWidth,
bool aItalic,
bool aBold,
bool aMultilineAllowed,
void* aData )
{
int textPensize = aWidth;
if( textPensize == 0 && aBold ) // Use default values if aWidth == 0
textPensize = GetPenSizeForBold( std::min( aSize.x, aSize.y ) );
if( textPensize >= 0 )
textPensize = Clamp_Text_PenSize( aWidth, aSize, aBold );
else
textPensize = -Clamp_Text_PenSize( -aWidth, aSize, aBold );
SetCurrentLineWidth( textPensize, aData );
SetColor( aColor );
GRText( NULL, aPos, aColor, aText, aOrient, aSize, aH_justify, aV_justify, textPensize,
aItalic, aBold, nullptr, nullptr, this );
if( aWidth != textPensize )
SetCurrentLineWidth( aWidth, aData );
}
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