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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright The 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 <gal/graphics_abstraction_layer.h>
#include <preview_items/draw_context.h>
#include <preview_items/preview_utils.h>
#include <view/view.h>
using namespace KIGFX::PREVIEW;
using KIGFX::COLOR4D;
static constexpr double ANGLE_EPSILON = 1e-9;
static bool angleIsSpecial( EDA_ANGLE aAngle )
{
return std::fabs( std::remainder( aAngle.AsRadians(), M_PI_4 ) ) < ANGLE_EPSILON;
}
static COLOR4D deemphasise( const COLOR4D& aColor, bool aDeEmphasised )
{
return aColor.WithAlpha( PreviewOverlayDeemphAlpha( aDeEmphasised ) );
}
DRAW_CONTEXT::DRAW_CONTEXT( KIGFX::VIEW& aView )
: m_gal( *aView.GetGAL() ),
m_render_settings( *aView.GetPainter()->GetSettings() ),
m_currLayer( LAYER_AUX_ITEMS ),
m_lineWidth( 1.0f )
{
}
void DRAW_CONTEXT::DrawCircle( const VECTOR2I& aOrigin, double aRad, bool aDeEmphasised )
{
const COLOR4D& color = m_render_settings.GetLayerColor( m_currLayer );
m_gal.SetLineWidth( m_lineWidth );
m_gal.SetStrokeColor( deemphasise( color, aDeEmphasised ) );
m_gal.SetIsStroke( true );
m_gal.SetIsFill( false );
m_gal.DrawCircle( aOrigin, aRad );
}
void DRAW_CONTEXT::DrawCircleDashed( const VECTOR2I& aOrigin, double aRad, double aStepAngle,
double aFillAngle, bool aDeEmphasised )
{
const COLOR4D& color = m_render_settings.GetLayerColor( m_currLayer );
m_gal.SetLineWidth( m_lineWidth );
m_gal.SetStrokeColor( deemphasise( color, aDeEmphasised ) );
m_gal.SetIsStroke( true );
m_gal.SetIsFill( false );
for( int i = 0; i < 360; i += aStepAngle )
{
m_gal.DrawArc( aOrigin, aRad, EDA_ANGLE( i, DEGREES_T ),
EDA_ANGLE( i + aFillAngle, DEGREES_T ) );
}
}
void DRAW_CONTEXT::DrawLine( const VECTOR2I& aStart, const VECTOR2I& aEnd, bool aDeEmphasised )
{
COLOR4D strokeColor = m_render_settings.GetLayerColor( m_currLayer );
m_gal.SetLineWidth( m_lineWidth );
m_gal.SetIsStroke( true );
m_gal.SetStrokeColor( deemphasise( strokeColor, aDeEmphasised ) );
m_gal.DrawLine( aStart, aEnd );
}
void DRAW_CONTEXT::DrawLineDashed( const VECTOR2I& aStart, const VECTOR2I& aEnd, int aDashStep,
int aDashFill, bool aDeEmphasised )
{
COLOR4D strokeColor = m_render_settings.GetLayerColor( m_currLayer );
m_gal.SetLineWidth( m_lineWidth );
m_gal.SetIsStroke( true );
m_gal.SetStrokeColor( deemphasise( strokeColor, aDeEmphasised ) );
VECTOR2I delta = aEnd - aStart;
int vecLen = delta.EuclideanNorm();
for( int i = 0; i < vecLen; i += aDashStep )
{
VECTOR2I a = aStart + delta.Resize( i );
VECTOR2I b = aStart + delta.Resize( std::min( i + aDashFill, vecLen ) );
m_gal.DrawLine( a, b );
}
}
void DRAW_CONTEXT::DrawLineWithAngleHighlight( const VECTOR2I& aStart, const VECTOR2I& aEnd,
bool aDeEmphasised )
{
const VECTOR2I vec = aEnd - aStart;
COLOR4D strokeColor = m_render_settings.GetLayerColor( m_currLayer );
if( angleIsSpecial( EDA_ANGLE( vec ) ) )
strokeColor = getSpecialAngleColour();
m_gal.SetLineWidth( m_lineWidth );
m_gal.SetIsStroke( true );
m_gal.SetStrokeColor( deemphasise( strokeColor, aDeEmphasised ) );
m_gal.DrawLine( aStart, aEnd );
}
COLOR4D DRAW_CONTEXT::getSpecialAngleColour() const
{
return m_render_settings.IsBackgroundDark() ? COLOR4D( 0.5, 1.0, 0.5, 1.0 ) :
COLOR4D( 0.0, 0.7, 0.0, 1.0 );
}
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