1 /*
2 * This program source code file is part of KiCad, a free EDA CAD application.
3 *
4 * Copyright (C) 2019 KiCad Developers, see AUTHORS.txt for contributors.
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version 2
9 * of the License, or (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, you may find one here:
18 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
19 * or you may search the http://www.gnu.org website for the version 2 license,
20 * or you may write to the Free Software Foundation, Inc.,
21 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
22 */
23
24 #include <preview_items/draw_context.h>
25
26 #include <preview_items/preview_utils.h>
27
28 #include <view/view.h>
29
30 using namespace KIGFX::PREVIEW;
31
32
33 static constexpr double ANGLE_EPSILON = 1e-9;
34
angleIsSpecial(double aRadians)35 static bool angleIsSpecial( double aRadians )
36 {
37 return std::fabs( std::remainder( aRadians, M_PI_4 ) ) < ANGLE_EPSILON;
38 }
39
40
deemphasise(const COLOR4D & aColor,bool aDeEmphasised)41 static COLOR4D deemphasise( const COLOR4D& aColor, bool aDeEmphasised )
42 {
43 return aColor.WithAlpha( PreviewOverlayDeemphAlpha( aDeEmphasised ) );
44 }
45
46
DRAW_CONTEXT(KIGFX::VIEW & aView)47 DRAW_CONTEXT::DRAW_CONTEXT( KIGFX::VIEW& aView )
48 : m_gal( *aView.GetGAL() ),
49 m_render_settings( *aView.GetPainter()->GetSettings() ),
50 m_currLayer( LAYER_AUX_ITEMS ),
51 m_lineWidth( 1.0f )
52 {
53 }
54
55
DrawCircle(const VECTOR2I & aOrigin,double aRad,bool aDeEmphasised)56 void DRAW_CONTEXT::DrawCircle( const VECTOR2I& aOrigin, double aRad, bool aDeEmphasised )
57 {
58 const COLOR4D& color = m_render_settings.GetLayerColor( m_currLayer );
59
60 m_gal.SetLineWidth( m_lineWidth );
61 m_gal.SetStrokeColor( deemphasise( color, aDeEmphasised ) );
62 m_gal.SetIsStroke( true );
63 m_gal.SetIsFill( false );
64 m_gal.DrawCircle( aOrigin, aRad );
65 }
66
67
DrawLine(const VECTOR2I & aStart,const VECTOR2I & aEnd,bool aDeEmphasised)68 void DRAW_CONTEXT::DrawLine( const VECTOR2I& aStart, const VECTOR2I& aEnd, bool aDeEmphasised )
69 {
70 COLOR4D strokeColor = m_render_settings.GetLayerColor( m_currLayer );
71
72 m_gal.SetLineWidth( m_lineWidth );
73 m_gal.SetIsStroke( true );
74 m_gal.SetStrokeColor( deemphasise( strokeColor, aDeEmphasised ) );
75 m_gal.DrawLine( aStart, aEnd );
76 }
77
78
DrawLineWithAngleHighlight(const VECTOR2I & aStart,const VECTOR2I & aEnd,bool aDeEmphasised)79 void DRAW_CONTEXT::DrawLineWithAngleHighlight( const VECTOR2I& aStart, const VECTOR2I& aEnd,
80 bool aDeEmphasised )
81 {
82 const VECTOR2I vec = aEnd - aStart;
83 COLOR4D strokeColor = m_render_settings.GetLayerColor( m_currLayer );
84
85 if( angleIsSpecial( vec.Angle() ) )
86 strokeColor = getSpecialAngleColour();
87
88 m_gal.SetLineWidth( m_lineWidth );
89 m_gal.SetIsStroke( true );
90 m_gal.SetStrokeColor( deemphasise( strokeColor, aDeEmphasised ) );
91 m_gal.DrawLine( aStart, aEnd );
92 }
93
94
getSpecialAngleColour() const95 COLOR4D DRAW_CONTEXT::getSpecialAngleColour() const
96 {
97 return m_render_settings.IsBackgroundDark() ? COLOR4D( 0.5, 1.0, 0.5, 1.0 ) :
98 COLOR4D( 0.0, 0.7, 0.0, 1.0 );
99 }