render_settings.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2020 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 <render_settings.h>
 
using namespace KIGFX;
 
 
RENDER_SETTINGS::RENDER_SETTINGS() :
 m_highlightNetcodes(),
 m_drawBoundingBoxes( false ),
 m_dashLengthRatio( 12 ), // From ISO 128-2
 m_gapLengthRatio( 3 ), // From ISO 128-2
 m_printDC( nullptr )
{
 // Set the default initial values
 m_activeLayer = F_Cu;
 m_highlightFactor = 0.5f;
 m_selectFactor = 0.5f;
 m_highlightEnabled = false;
 m_hiContrastEnabled = false;
 m_hiContrastFactor = 0.2f;
 m_outlineWidth = 1;
 m_drawingSheetLineWidth = 100000;
 m_defaultPenWidth = 0;
 m_minPenWidth = 0;
 m_isPrinting = false;
 m_printBlackAndWite = false;
}
 
 
RENDER_SETTINGS::~RENDER_SETTINGS()
{
}
 
 
#if 0
constexpr double correction = 0.8; // Looks best visually
#else
constexpr double correction = 1.0; // Matches ISO 128-2
#endif
 
 
double RENDER_SETTINGS::GetDashLength( int aLineWidth ) const
{
 return std::max( m_dashLengthRatio - correction, 1.0 ) * aLineWidth;
}
 
 
double RENDER_SETTINGS::GetDotLength( int aLineWidth ) const
{
 return ( 1.0 - correction ) * aLineWidth;
}
 
 
double RENDER_SETTINGS::GetGapLength( int aLineWidth ) const
{
 return std::max( m_gapLengthRatio + correction, 1.0 ) * aLineWidth;
}
 
 
void RENDER_SETTINGS::update()
{
 // Calculate darkened/highlighted variants of layer colors
 for( int i = 0; i < LAYER_ID_COUNT; i++ )
 {
 m_hiContrastColor[i] = m_layerColors[i].Mix( m_layerColors[LAYER_PCB_BACKGROUND],
 m_hiContrastFactor );
 
 m_layerColorsHi[i] = m_layerColors[i].Brightened( m_highlightFactor );
 m_layerColorsDark[i] = m_layerColors[i].Darkened( 1.0 - m_highlightFactor );
 
 // Skip selection brightening for things close to black, and netname text
 if( IsNetnameLayer( i ) || m_layerColors[i].GetBrightness() < 0.05 )
 {
 m_layerColorsSel[i] = m_layerColors[i];
 continue;
 }
 
 // Linear brightening doesn't work well for colors near white
 double factor = ( m_selectFactor * 0.5 ) + pow( m_layerColors[i].GetBrightness(), 3 );
 factor = std::min( 1.0, factor );
 
 m_layerColorsSel[i] = m_layerColors[i].Brightened( factor );
 
 // If we are maxed out on brightening as a highlight, fallback to darkening but keep
 // the blue that acts as a "glowing" color
 if( std::fabs( m_layerColorsSel[i].GetBrightness() - m_layerColors[i].GetBrightness() )
 < 0.05 )
 {
 m_layerColorsSel[i] = m_layerColors[i].Darkened( m_selectFactor * 0.4 );
 m_layerColorsSel[i].b = m_layerColors[i].b * ( 1.0 - factor ) + factor;
 }
 
 }
}