kicad/common/gr_basic.cpp

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2015 Jean-Pierre Charras, jp.charras at wanadoo.fr
* Copyright (C) 2011 Wayne Stambaugh <stambaughw@gmail.com>
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* Copyright (C) 1992-2022 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include <gr_basic.h>
#include <trigo.h>
#include <eda_item.h>
#include <wx/graphics.h>
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#include <algorithm>
static const bool FILLED = true;
static const bool NOT_FILLED = false;
// For draw mode = XOR GR_XOR or GR_NXOR by background color
GR_DRAWMODE g_XorMode = GR_NXOR;
/* These functions are used by corresponding functions
* ( GRSCircle is called by GRCircle for instance) after mapping coordinates
* from user units to screen units(pixels coordinates)
*/
static void GRSRect( wxDC* aDC, int x1, int y1, int x2, int y2, int aWidth, const COLOR4D& aColor );
/**/
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static int GRLastMoveToX, GRLastMoveToY;
static bool s_ForceBlackPen; /* if true: draws in black instead of
* color for printing. */
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static COLOR4D s_DC_lastbrushcolor( 0, 0, 0, 0 );
static bool s_DC_lastbrushfill = false;
static wxDC* s_DC_lastDC = nullptr;
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static void vector2IwxDrawPolygon( wxDC* aDC, const VECTOR2I* Points, int n )
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{
wxPoint* points = new wxPoint[n];
for( int i = 0; i < n; i++ )
points[i] = wxPoint( Points[i].x, Points[i].y );
aDC->DrawPolygon( n, points );
delete[] points;
}
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static void winDrawLine( wxDC* DC, int x1, int y1, int x2, int y2, int width )
{
GRLastMoveToX = x2;
GRLastMoveToY = y2;
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DC->DrawLine( x1, y1, x2, y2 );
}
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void GRResetPenAndBrush( wxDC* DC )
{
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GRSetBrush( DC, BLACK ); // Force no fill
s_DC_lastbrushcolor = COLOR4D::UNSPECIFIED;
s_DC_lastDC = nullptr;
}
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void GRSetColorPen( wxDC* DC, const COLOR4D& Color, int width, wxPenStyle style )
{
COLOR4D color = Color;
wxDash dots[2] = { 1, 3 };
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// Under OSX and while printing when wxPen is set to 0, renderer follows the request drawing
// nothing & in the bitmap world the minimum is enough to light a pixel, in vectorial one not
if( width <= 1 && DC->GetBrush().GetStyle() != wxBRUSHSTYLE_SOLID )
width = DC->DeviceToLogicalXRel( 1 );
if( s_ForceBlackPen )
color = COLOR4D::BLACK;
const wxPen& curr_pen = DC->GetPen();
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if( !curr_pen.IsOk() || curr_pen.GetColour() != color.ToColour()
|| curr_pen.GetWidth() != width || curr_pen.GetStyle() != style )
{
wxPen pen;
pen.SetColour( color.ToColour() );
if( style == wxPENSTYLE_DOT )
{
style = wxPENSTYLE_USER_DASH;
pen.SetDashes( 2, dots );
}
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pen.SetWidth( width );
pen.SetStyle( style );
DC->SetPen( pen );
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}
else
{
// Should be not needed, but on Linux, in printing process
// the curr pen settings needs to be sometimes re-initialized
// Clearly, this is due to a bug, related to SetBrush(),
// but we have to live with it, at least on wxWidgets 3.0
DC->SetPen( curr_pen );
}
}
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void GRSetBrush( wxDC* DC, const COLOR4D& Color, bool fill )
{
COLOR4D color = Color;
if( s_ForceBlackPen )
color = COLOR4D::BLACK;
if( s_DC_lastbrushcolor != color || s_DC_lastbrushfill != fill || s_DC_lastDC != DC )
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{
wxBrush brush;
brush.SetColour( color.ToColour() );
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if( fill )
brush.SetStyle( wxBRUSHSTYLE_SOLID );
else
brush.SetStyle( wxBRUSHSTYLE_TRANSPARENT );
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DC->SetBrush( brush );
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s_DC_lastbrushcolor = color;
s_DC_lastbrushfill = fill;
s_DC_lastDC = DC;
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}
}
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void GRForceBlackPen( bool flagforce )
{
s_ForceBlackPen = flagforce;
}
bool GetGRForceBlackPenState( void )
{
return s_ForceBlackPen;
}
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void GRLine( wxDC* DC, int x1, int y1, int x2, int y2, int width, const COLOR4D& Color,
wxPenStyle aStyle)
{
GRSetColorPen( DC, Color, width, aStyle );
winDrawLine( DC, x1, y1, x2, y2, width );
GRLastMoveToX = x2;
GRLastMoveToY = y2;
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}
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void GRLine( wxDC* aDC, const VECTOR2I& aStart, const VECTOR2I& aEnd, int aWidth,
const COLOR4D& aColor, wxPenStyle aStyle )
{
GRLine( aDC, aStart.x, aStart.y, aEnd.x, aEnd.y, aWidth, aColor, aStyle );
}
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void GRMoveTo( int x, int y )
{
GRLastMoveToX = x;
GRLastMoveToY = y;
}
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void GRLineTo( wxDC* DC, int x, int y, int width, const COLOR4D& Color )
{
GRLine( DC, GRLastMoveToX, GRLastMoveToY, x, y, width, Color );
}
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void GRCSegm( wxDC* DC, const VECTOR2I& A, const VECTOR2I& B, int width, const COLOR4D& Color )
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{
GRLastMoveToX = B.x;
GRLastMoveToY = B.y;
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if( width <= 2 ) /* single line or 2 pixels */
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{
GRSetColorPen( DC, Color, width );
DC->DrawLine( A.x, A.y, B.x, B.y );
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return;
}
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GRSetBrush( DC, Color, NOT_FILLED );
GRSetColorPen( DC, Color, 0 );
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int radius = ( width + 1 ) >> 1;
int dx = B.x - A.x;
int dy = B.y - A.y;
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EDA_ANGLE angle( VECTOR2I( dx, dy ) );
angle = -angle;
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VECTOR2I start;
VECTOR2I end;
VECTOR2I org( A.x, A.y );
int len = (int) hypot( dx, dy );
// We know if the DC is mirrored, to draw arcs
int slx = DC->DeviceToLogicalX( 1 ) - DC->DeviceToLogicalX( 0 );
int sly = DC->DeviceToLogicalY( 1 ) - DC->DeviceToLogicalY( 0 );
bool mirrored = ( slx > 0 && sly < 0 ) || ( slx < 0 && sly > 0 );
// first edge
start.x = 0;
start.y = radius;
end.x = len;
end.y = radius;
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RotatePoint( start, angle );
RotatePoint( end, angle );
start += org;
end += org;
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DC->DrawLine( (wxPoint) start, (wxPoint) end );
// first rounded end
end.x = 0;
end.y = -radius;
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RotatePoint( end, angle );
end += org;
if( !mirrored )
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DC->DrawArc( (wxPoint) end, (wxPoint) start, (wxPoint) org );
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else
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DC->DrawArc( (wxPoint) start, (wxPoint) end, (wxPoint) org );
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// second edge
start.x = len;
start.y = -radius;
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RotatePoint( start, angle );
start += org;
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DC->DrawLine( (wxPoint) start, (wxPoint) end );
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// second rounded end
end.x = len;
end.y = radius;
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RotatePoint( end, angle);
end += org;
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if( !mirrored )
DC->DrawArc( end.x, end.y, start.x, start.y, B.x, B.y );
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else
DC->DrawArc( start.x, start.y, end.x, end.y, B.x, B.y );
}
void GRFilledSegment( wxDC* aDC, const VECTOR2I& aStart, const VECTOR2I& aEnd, int aWidth,
const COLOR4D& aColor )
{
GRSetColorPen( aDC, aColor, aWidth );
winDrawLine( aDC, aStart.x, aStart.y, aEnd.x, aEnd.y, aWidth );
}
/**
* Draw a new polyline and fill it if Fill, in screen space.
*/
static void GRSPoly( wxDC* DC, int n, const VECTOR2I* Points, bool Fill, int width,
const COLOR4D& Color, const COLOR4D& BgColor )
{
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if( Fill && ( n > 2 ) )
{
GRSetBrush( DC, BgColor, FILLED );
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GRSetColorPen( DC, Color, width );
vector2IwxDrawPolygon( DC, Points, n );
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}
else
{
GRMoveTo( Points[0].x, Points[0].y );
for( int i = 1; i < n; ++i )
GRLineTo( DC, Points[i].x, Points[i].y, width, Color );
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}
}
/**
* Draw a new closed polyline and fill it if Fill, in screen space.
*/
static void GRSClosedPoly( wxDC* aDC, int aPointCount, const VECTOR2I* aPoints, bool aFill,
int aWidth, const COLOR4D& aColor, const COLOR4D& aBgColor )
{
if( aFill && ( aPointCount > 2 ) )
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{
GRLastMoveToX = aPoints[aPointCount - 1].x;
GRLastMoveToY = aPoints[aPointCount - 1].y;
GRSetBrush( aDC, aBgColor, FILLED );
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GRSetColorPen( aDC, aColor, aWidth );
vector2IwxDrawPolygon( aDC, aPoints, aPointCount );
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}
else
{
GRMoveTo( aPoints[0].x, aPoints[0].y );
for( int i = 1; i < aPointCount; ++i )
GRLineTo( aDC, aPoints[i].x, aPoints[i].y, aWidth, aColor );
int lastpt = aPointCount - 1;
// Close the polygon
if( aPoints[lastpt] != aPoints[0] )
GRLineTo( aDC, aPoints[0].x, aPoints[0].y, aWidth, aColor );
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}
}
/**
* Draw a new polyline and fill it if Fill, in drawing space.
*/
void GRPoly( wxDC* DC, int n, const VECTOR2I* Points, bool Fill, int width, const COLOR4D& Color,
const COLOR4D& BgColor )
{
GRSPoly( DC, n, Points, Fill, width, Color, BgColor );
}
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/**
* Draw a closed polyline and fill it if Fill, in object space.
*/
void GRClosedPoly( wxDC* DC, int n, const VECTOR2I* Points, bool Fill, const COLOR4D& Color )
{
GRSClosedPoly( DC, n, Points, Fill, 0, Color, Color );
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}
void GRCircle( wxDC* aDC, const VECTOR2I& aPos, int aRadius, int aWidth, const COLOR4D& aColor )
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{
GRSetBrush( aDC, aColor, NOT_FILLED );
GRSetColorPen( aDC, aColor, aWidth );
// Draw two arcs here to make a circle. Unfortunately, the printerDC doesn't handle
// transparent brushes when used with circles. It does work for for arcs, however
aDC->DrawArc(aPos.x + aRadius, aPos.y, aPos.x - aRadius, aPos.y, aPos.x, aPos.y );
aDC->DrawArc(aPos.x - aRadius, aPos.y, aPos.x + aRadius, aPos.y, aPos.x, aPos.y );
}
void GRFilledCircle( wxDC* aDC, const VECTOR2I& aPos, int aRadius, int aWidth,
const COLOR4D& aStrokeColor, const COLOR4D& aFillColor )
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{
GRSetBrush( aDC, aFillColor, FILLED );
GRSetColorPen( aDC, aStrokeColor, aWidth );
aDC->DrawEllipse( aPos.x - aRadius, aPos.y - aRadius, 2 * aRadius, 2 * aRadius );
}
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void GRArc( wxDC* aDC, const VECTOR2I& aStart, const VECTOR2I& aEnd, const VECTOR2I& aCenter,
int aWidth, const COLOR4D& aColor )
{
GRSetBrush( aDC, aColor );
GRSetColorPen( aDC, aColor, aWidth );
aDC->DrawArc( aStart.x, aStart.y, aEnd.x, aEnd.y, aCenter.x, aCenter.y );
}
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void GRFilledArc( wxDC* DC, const VECTOR2I& aStart, const VECTOR2I& aEnd, const VECTOR2I& aCenter,
int width, const COLOR4D& Color, const COLOR4D& BgColor )
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{
GRSetBrush( DC, BgColor, FILLED );
GRSetColorPen( DC, Color, width );
DC->DrawArc( aStart.x, aStart.y, aEnd.x, aEnd.y, aCenter.x, aCenter.y );
}
void GRRect( wxDC* DC, const VECTOR2I& aStart, const VECTOR2I& aEnd, int aWidth,
const COLOR4D& aColor )
{
GRSRect( DC, aStart.x, aStart.y, aEnd.x, aEnd.y, aWidth, aColor );
}
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void GRFilledRect( wxDC* DC, const VECTOR2I& aStart, const VECTOR2I& aEnd, int aWidth,
const COLOR4D& aColor, const COLOR4D& aBgColor )
{
GRSFilledRect( DC, aStart.x, aStart.y, aEnd.x, aEnd.y, aWidth, aColor, aBgColor );
}
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void GRSRect( wxDC* aDC, int x1, int y1, int x2, int y2, int aWidth, const COLOR4D& aColor )
{
VECTOR2I points[5];
points[0] = VECTOR2I( x1, y1 );
points[1] = VECTOR2I( x1, y2 );
points[2] = VECTOR2I( x2, y2 );
points[3] = VECTOR2I( x2, y1 );
points[4] = points[0];
GRSClosedPoly( aDC, 5, points, NOT_FILLED, aWidth, aColor, aColor );
}
void GRSFilledRect( wxDC* aDC, int x1, int y1, int x2, int y2, int aWidth, const COLOR4D& aColor,
const COLOR4D& aBgColor )
{
VECTOR2I points[5];
points[0] = VECTOR2I( x1, y1 );
points[1] = VECTOR2I( x1, y2 );
points[2] = VECTOR2I( x2, y2 );
points[3] = VECTOR2I( x2, y1 );
points[4] = points[0];
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GRSetBrush( aDC, aBgColor, FILLED );
GRSetColorPen( aDC, aBgColor, aWidth );
vector2IwxDrawPolygon( aDC, points, 5 );
}