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kicad/common/gr_basic.cpp

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/********************************/
/* Low level graphics routines */
/********************************/
#include <fctsys.h>
#include <gr_basic.h>
#include <common.h>
#include <trigo.h>
#include <macros.h>
#include <base_struct.h>
#include <class_base_screen.h>
#include <bezier_curves.h>
#include <math_for_graphics.h>
#include <wx/graphics.h>
static const bool FILLED = true;
/* Important Note:
* These drawing functions clip draw item before send these items to wxDC draw
* functions. For guy who asks why i did it, see a sample of problems encountered
* when pixels
* coordinates overflow 16 bits values:
* http://trac.wxwidgets.org/ticket/10446
* Problems can be found under Windows **and** Linux (mainly when drawing arcs)
* (mainly at low zoom values (2, 1 or 0.5), in Pcbnew)
* some of these problems could be now fixed in recent distributions.
*
* Currently (feb 2009) there are overflow problems when drawing solid (filled)
* polygons under linux without clipping
*
* So before removing clipping functions, be aware these bug (they are not in
* KiCad or wxWidgets) are fixed by testing how are drawn complex lines arcs
* and solid polygons under Windows and Linux and remember users can have old
* versions with bugs
*/
/* Definitions for enabling and disabling debugging features in gr_basic.cpp.
* Please remember to set these back to 0 before making LAUNCHPAD commits.
*/
#define DEBUG_DUMP_CLIP_ERROR_COORDS 0 // Set to 1 to dump clip algorithm errors.
#define DEBUG_DUMP_CLIP_COORDS 0 // Set to 1 to dump clipped coordinates.
// For draw mode = XOR GR_XOR or GR_NXOR by background color
GR_DRAWMODE g_XorMode = GR_NXOR;
// Background color of the design frame
EDA_COLOR_T g_DrawBgColor = WHITE;
#define USE_CLIP_FILLED_POLYGONS
#ifdef USE_CLIP_FILLED_POLYGONS
static void ClipAndDrawFilledPoly( EDA_RECT * ClipBox, wxDC * DC, wxPoint Points[], int n );
#endif
/* 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( EDA_RECT* aClipBox, wxDC* aDC, int x1, int y1,
int x2, int y2, int aWidth, EDA_COLOR_T aColor,
wxPenStyle aStyle = wxPENSTYLE_SOLID );
/**/
static int GRLastMoveToX, GRLastMoveToY;
static bool s_ForceBlackPen; /* if true: draws in black instead of
* color for printing. */
static int xcliplo = 0,
ycliplo = 0,
xcliphi = 2000,
ycliphi = 2000;
static EDA_COLOR_T s_DC_lastcolor = UNSPECIFIED_COLOR;
static int s_DC_lastwidth = -1;
static int s_DC_lastpenstyle = -1;
static EDA_COLOR_T s_DC_lastbrushcolor = UNSPECIFIED_COLOR;
static bool s_DC_lastbrushfill = false;
static wxDC* s_DC_lastDC = NULL;
/**
* Test if any part of a line falls within the bounds of a rectangle.
*
* Please note that this is only accurate for lines that are one pixel wide.
*
* @param aClipBox - The rectangle to test.
* @param x1 - X coordinate of one end of a line.
* @param y1 - Y coordinate of one end of a line.
* @param x2 - X coordinate of the other end of a line.
* @param y2 - Y coordinate of the other end of a line.
*
* @return - False if any part of the line lies within the rectangle.
*/
static bool clipLine( EDA_RECT* aClipBox, int& x1, int& y1, int& x2, int& y2 )
{
if( aClipBox->Contains( x1, y1 ) && aClipBox->Contains( x2, y2 ) )
return false;
wxRect rect = *aClipBox;
int minX = rect.GetLeft();
int maxX = rect.GetRight();
int minY = rect.GetTop();
int maxY = rect.GetBottom();
int clippedX, clippedY;
#if DEBUG_DUMP_CLIP_COORDS
int tmpX1, tmpY1, tmpX2, tmpY2;
tmpX1 = x1;
tmpY1 = y1;
tmpX2 = x2;
tmpY2 = y2;
#endif
if( aClipBox->Contains( x1, y1 ) )
{
if( x1 == x2 ) /* Vertical line, clip Y. */
{
if( y2 < minY )
{
y2 = minY;
return false;
}
if( y2 > maxY )
{
y2 = maxY;
return false;
}
}
else if( y1 == y2 ) /* Horizontal line, clip X. */
{
if( x2 < minX )
{
x2 = minX;
return false;
}
if( x2 > maxX )
{
x2 = maxX;
return false;
}
}
/* If we're here, it's a diagonal line. */
if( TestForIntersectionOfStraightLineSegments( x1, y1, x2, y2, minX, minY, minX, maxY,
&clippedX, &clippedY ) /* Left */
|| TestForIntersectionOfStraightLineSegments( x1, y1, x2, y2, minX, minY, maxX, minY,
&clippedX, &clippedY ) /* Top */
|| TestForIntersectionOfStraightLineSegments( x1, y1, x2, y2, maxX, minY, maxX, maxY,
&clippedX, &clippedY ) /* Right */
|| TestForIntersectionOfStraightLineSegments( x1, y1, x2, y2, minX, maxY, maxX, maxY,
&clippedX, &clippedY ) ) /* Bottom */
{
if( x2 != clippedX )
x2 = clippedX;
if( y2 != clippedY )
y2 = clippedY;
return false;
}
/* If we're here, something has gone terribly wrong. */
#if DEBUG_DUMP_CLIP_ERROR_COORDS
wxLogDebug( wxT( "Line (%d,%d):(%d,%d) in rectangle (%d,%d,%d,%d) clipped to (%d,%d,%d,%d)" ),
tmpX1, tmpY1, tmpX2, tmpY2, minX, minY, maxX, maxY, x1, y1, x2, y2 );
#endif
return false;
}
else if( aClipBox->Contains( x2, y2 ) )
{
if( x1 == x2 ) /* Vertical line, clip Y. */
{
if( y2 < minY )
{
y2 = minY;
return false;
}
if( y2 > maxY )
{
y2 = maxY;
return false;
}
}
else if( y1 == y2 ) /* Horizontal line, clip X. */
{
if( x2 < minX )
{
x2 = minX;
return false;
}
if( x2 > maxX )
{
x2 = maxX;
return false;
}
}
if( TestForIntersectionOfStraightLineSegments( x1, y1, x2, y2, minX, minY, minX, maxY,
&clippedX, &clippedY ) /* Left */
|| TestForIntersectionOfStraightLineSegments( x1, y1, x2, y2, minX, minY, maxX, minY,
&clippedX, &clippedY ) /* Top */
|| TestForIntersectionOfStraightLineSegments( x1, y1, x2, y2, maxX, minY, maxX, maxY,
&clippedX, &clippedY ) /* Right */
|| TestForIntersectionOfStraightLineSegments( x1, y1, x2, y2, minX, maxY, maxX, maxY,
&clippedX, &clippedY ) ) /* Bottom */
{
if( x1 != clippedX )
x1 = clippedX;
if( y1 != clippedY )
y1 = clippedY;
return false;
}
/* If we're here, something has gone terribly wrong. */
#if DEBUG_DUMP_CLIP_ERROR_COORDS
wxLogDebug( wxT( "Line (%d,%d):(%d,%d) in rectangle (%d,%d,%d,%d) clipped to (%d,%d,%d,%d)" ),
tmpX1, tmpY1, tmpX2, tmpY2, minX, minY, maxX, maxY, x1, y1, x2, y2 );
#endif
return false;
}
else
{
int* intersectX;
int* intersectY;
int intersectX1, intersectY1, intersectX2, intersectY2;
bool haveFirstPoint = false;
intersectX = &intersectX1;
intersectY = &intersectY1;
/* Left clip rectangle line. */
if( TestForIntersectionOfStraightLineSegments( x1, y1, x2, y2, minX, minY, minX, maxY,
intersectX, intersectY ) )
{
intersectX = &intersectX2;
intersectY = &intersectY2;
haveFirstPoint = true;
}
/* Top clip rectangle line. */
if( TestForIntersectionOfStraightLineSegments( x1, y1, x2, y2, minX, minY, maxX, minY,
intersectX, intersectY ) )
{
intersectX = &intersectX2;
intersectY = &intersectY2;
if( haveFirstPoint )
{
x1 = intersectX1;
y1 = intersectY1;
x2 = intersectX2;
y2 = intersectY2;
return false;
}
haveFirstPoint = true;
}
/* Right clip rectangle line. */
if( TestForIntersectionOfStraightLineSegments( x1, y1, x2, y2, maxX, minY, maxX, maxY,
intersectX, intersectY ) )
{
intersectX = &intersectX2;
intersectY = &intersectY2;
if( haveFirstPoint )
{
x1 = intersectX1;
y1 = intersectY1;
x2 = intersectX2;
y2 = intersectY2;
return false;
}
haveFirstPoint = true;
}
/* Bottom clip rectangle line. */
if( TestForIntersectionOfStraightLineSegments( x1, y1, x2, y2, minX, maxY, maxX, maxY,
intersectX, intersectY ) )
{
intersectX = &intersectX2;
intersectY = &intersectY2;
if( haveFirstPoint )
{
x1 = intersectX1;
y1 = intersectY1;
x2 = intersectX2;
y2 = intersectY2;
return false;
}
}
/* If we're here and only one line of the clip box has been intersected,
* something has gone terribly wrong. */
#if DEBUG_DUMP_CLIP_ERROR_COORDS
if( haveFirstPoint )
wxLogDebug( wxT( "Line (%d,%d):(%d,%d) in rectangle (%d,%d,%d,%d) clipped to (%d,%d,%d,%d)" ),
tmpX1, tmpY1, tmpX2, tmpY2, minX, minY, maxX, maxY, x1, y1, x2, y2 );
#endif
}
/* Set this to one to verify that diagonal lines get clipped properly. */
#if DEBUG_DUMP_CLIP_COORDS
if( !( x1 == x2 || y1 == y2 ) )
wxLogDebug( wxT( "Clipped line (%d,%d):(%d,%d) from rectangle (%d,%d,%d,%d)" ),
tmpX1, tmpY1, tmpX2, tmpY2, minX, minY, maxX, maxY );
#endif
return true;
}
static void WinClipAndDrawLine( EDA_RECT* ClipBox, wxDC* DC, int x1, int y1, int x2, int y2,
EDA_COLOR_T Color, int width = 1 )
{
GRLastMoveToX = x2;
GRLastMoveToY = y2;
if( ClipBox )
{
EDA_RECT clipbox(*ClipBox);
clipbox.Inflate(width/2);
if( clipLine( &clipbox, x1, y1, x2, y2 ) )
return;
}
GRSetColorPen( DC, Color, width );
DC->DrawLine( x1, y1, x2, y2 );
}
/* Forcing a reset of the current pen.
* Must be called after changing the graphical device before any trace.
*/
void GRResetPenAndBrush( wxDC* DC )
{
GRSetBrush( DC, BLACK ); // Force no fill
s_DC_lastbrushcolor = UNSPECIFIED_COLOR;
s_DC_lastcolor = UNSPECIFIED_COLOR;
s_DC_lastDC = NULL;
}
/**
* Function GRSetColorPen
* sets a pen style, width, color, and alpha into the given device context.
*/
void GRSetColorPen( wxDC* DC, EDA_COLOR_T Color, int width, wxPenStyle style )
{
if( width < 0 )
width = 0;
#ifdef __WXMAC__
// Under OSX when wxPen is set to 0, cocoa follows the request drawing nothing &
// in the bitmap world the minimum is enough to light a pixel, in vectorial one not
if( width <= 1 )
width = DC->DeviceToLogicalXRel( 1 );
#endif
if( s_ForceBlackPen )
{
Color = BLACK;
}
if( s_DC_lastcolor != Color
|| s_DC_lastwidth != width
|| s_DC_lastpenstyle != style
|| s_DC_lastDC != DC )
{
wxPen pen;
wxColour wx_color = MakeColour( Color );
pen.SetColour( wx_color );
pen.SetWidth( width );
pen.SetStyle( style );
DC->SetPen( pen );
s_DC_lastcolor = Color;
s_DC_lastwidth = width;
s_DC_lastpenstyle = style;
s_DC_lastDC = DC;
}
}
void GRSetBrush( wxDC* DC, EDA_COLOR_T Color, bool fill )
{
if( s_ForceBlackPen )
Color = BLACK;
if( s_DC_lastbrushcolor != Color
|| s_DC_lastbrushfill != fill
|| s_DC_lastDC != DC )
{
wxBrush DrawBrush;
DrawBrush.SetColour( MakeColour( Color ) );
if( fill )
DrawBrush.SetStyle( wxSOLID );
else
DrawBrush.SetStyle( wxTRANSPARENT );
DC->SetBrush( DrawBrush );
s_DC_lastbrushcolor = Color;
s_DC_lastbrushfill = fill;
s_DC_lastDC = DC;
}
}
/**
* Function GRForceBlackPen
* @param flagforce True to force a black pen whenever the asked color
*/
void GRForceBlackPen( bool flagforce )
{
s_ForceBlackPen = flagforce;
}
/**
* Function GetGRForceBlackPenState
* @return s_ForceBlackPen (True if a black pen was forced)
*/
bool GetGRForceBlackPenState( void )
{
return s_ForceBlackPen;
}
/*************************************/
/* Set the device context draw mode. */
/*************************************/
void GRSetDrawMode( wxDC* DC, GR_DRAWMODE draw_mode )
{
if( draw_mode & GR_OR )
#if defined(__WXMAC__) && (wxMAC_USE_CORE_GRAPHICS || wxCHECK_VERSION( 2, 9, 0 ) )
DC->SetLogicalFunction( wxCOPY );
#elif defined( USE_WX_GRAPHICS_CONTEXT )
DC->SetLogicalFunction( wxCOPY );
#else
DC->SetLogicalFunction( wxOR );
#endif
else if( draw_mode & GR_XOR )
#if defined( USE_WX_GRAPHICS_CONTEXT )
DC->SetLogicalFunction( wxCOPY );
#else
DC->SetLogicalFunction( wxXOR );
#endif
else if( draw_mode & GR_NXOR )
#if defined(__WXMAC__) && (wxMAC_USE_CORE_GRAPHICS || wxCHECK_VERSION( 2, 9, 0 ) )
DC->SetLogicalFunction( wxXOR );
#elif defined( USE_WX_GRAPHICS_CONTEXT )
DC->SetLogicalFunction( wxCOPY );
#else
DC->SetLogicalFunction( wxEQUIV );
#endif
else if( draw_mode & GR_INVERT )
#if defined( USE_WX_GRAPHICS_CONTEXT )
DC->SetLogicalFunction( wxCOPY );
#else
DC->SetLogicalFunction( wxINVERT );
#endif
else
DC->SetLogicalFunction( wxCOPY );
#ifdef USE_WX_OVERLAY
DC->SetLogicalFunction( wxCOPY );
#endif
}
void GRPutPixel( EDA_RECT* ClipBox, wxDC* DC, int x, int y, EDA_COLOR_T Color )
{
if( ClipBox && !ClipBox->Contains( x, y ) )
return;
GRSetColorPen( DC, Color );
DC->DrawPoint( x, y );
}
/*
* Draw a line, in object space.
*/
void GRLine( EDA_RECT* ClipBox,
wxDC* DC,
int x1,
int y1,
int x2,
int y2,
int width,
EDA_COLOR_T Color )
{
WinClipAndDrawLine( ClipBox, DC, x1, y1, x2, y2, Color, width );
GRLastMoveToX = x2;
GRLastMoveToY = y2;
}
void GRLine( EDA_RECT* aClipBox, wxDC* aDC, wxPoint aStart, wxPoint aEnd, int aWidth, EDA_COLOR_T aColor )
{
GRLine( aClipBox, aDC, aStart.x, aStart.y, aEnd.x, aEnd.y, aWidth, aColor );
}
void GRDashedLineTo( EDA_RECT* ClipBox, wxDC* DC, int x2, int y2, int width, EDA_COLOR_T Color )
{
s_DC_lastcolor = UNSPECIFIED_COLOR;
GRSetColorPen( DC, Color, width, wxPENSTYLE_SHORT_DASH );
GRLine( ClipBox, DC, GRLastMoveToX, GRLastMoveToY, x2, y2, width, Color );
s_DC_lastcolor = UNSPECIFIED_COLOR;
GRSetColorPen( DC, Color, width );
GRLastMoveToX = x2;
GRLastMoveToY = y2;
}
void GRDashedLine( EDA_RECT* ClipBox,
wxDC* DC,
int x1,
int y1,
int x2,
int y2,
int width,
EDA_COLOR_T Color )
{
GRLastMoveToX = x2;
GRLastMoveToY = y2;
s_DC_lastcolor = UNSPECIFIED_COLOR;
GRSetColorPen( DC, Color, width, wxPENSTYLE_SHORT_DASH );
GRLine( ClipBox, DC, x1, y1, x2, y2, width, Color );
s_DC_lastcolor = UNSPECIFIED_COLOR;
GRSetColorPen( DC, Color, width );
}
/*
* Move to a new position, in object space.
*/
void GRMoveTo( int x, int y )
{
GRLastMoveToX = x;
GRLastMoveToY = y;
}
/*
* Draw line to a new position, in object space.
*/
void GRLineTo( EDA_RECT* ClipBox, wxDC* DC, int x, int y, int width, EDA_COLOR_T Color )
{
int GRLineToX, GRLineToY;
GRLineToX = x;
GRLineToY = y;
GRLine( ClipBox, DC, GRLastMoveToX, GRLastMoveToY, GRLineToX, GRLineToY, width, Color );
}
void GRMixedLine( EDA_RECT* ClipBox, wxDC* DC, int x1, int y1, int x2, int y2,
int width, EDA_COLOR_T Color )
{
GRSetColorPen( DC, Color, width, wxPENSTYLE_DOT_DASH );
GRLine( ClipBox, DC, x1, y1, x2, y2, width, Color );
GRSetColorPen( DC, Color, width );
}
/**
* Function GRLineArray
* draws an array of lines (not a polygon).
* @param aClipBox = the clip box
* @param aDC = the device context into which drawing should occur.
* @param aLines = a list of pair of coordinate in user space: a pair for each line.
* @param aWidth = the width of each line.
* @param aColor = an index into our color table of RGB colors.
* @see EDA_COLOR_T and colors.h
*/
void GRLineArray( EDA_RECT* aClipBox, wxDC* aDC, std::vector<wxPoint>& aLines,
int aWidth, EDA_COLOR_T aColor )
{
GRSetColorPen( aDC, aColor, aWidth );
#if defined( USE_WX_GRAPHICS_CONTEXT ) || defined(__WXMAC__)
wxGraphicsContext* gc = wxGraphicsContext::Create( aDC );
wxASSERT( gc );
gc->Clip( aClipBox->GetX(), aClipBox->GetY(), aClipBox->GetRight(), aClipBox->GetHeight() );
wxGraphicsPath path = gc->CreatePath();
for( unsigned i = 0; i < aLines.size(); )
{
path.MoveToPoint( aLines[i].x, aLines[i].y );
i++;
path.AddLineToPoint( aLines[i].x, aLines[i].y );
i++;
}
gc->StrokePath( path );
gc->ResetClip();
delete gc;
#else
if( aClipBox )
aClipBox->Inflate(aWidth/2);
for( unsigned i = 0; i < aLines.size(); i += 2)
{
int x1 = aLines[i].x;
int y1 = aLines[i].y;
int x2 = aLines[i+1].x;
int y2 = aLines[i+1].y;
GRLastMoveToX = x2;
GRLastMoveToY = y2;
if( ( aClipBox == NULL ) || !clipLine( aClipBox, x1, y1, x2, y2 ) )
aDC->DrawLine( x1, y1, x2, y2 );
}
if( aClipBox )
aClipBox->Inflate(-aWidth/2);
#endif
}
void GRCSegm( EDA_RECT* ClipBox, wxDC* DC, int x1, int y1, int x2, int y2,
int width, int aPenSize, EDA_COLOR_T Color )
{
long radius;
int dwx, dwy;
long dx, dy, dwx2, dwy2;
long sx1, sy1, ex1, ey1;
long sx2, sy2, ex2, ey2;
bool swap_ends = false;
GRLastMoveToX = x2;
GRLastMoveToY = y2;
if( ClipBox )
{
EDA_RECT clipbox(*ClipBox);
clipbox.Inflate(width/2);
if( clipLine( &clipbox, x1, y1, x2, y2 ) )
return;
}
if( width <= 2 ) /* single line or 2 pixels */
{
GRSetColorPen( DC, Color, width );
DC->DrawLine( x1, y1, x2, y2 );
return;
}
GRSetColorPen( DC, Color, aPenSize );
GRSetBrush( DC, Color, false );
radius = (width + 1) >> 1;
dx = x2 - x1;
dy = y2 - y1;
if( dx == 0 ) /* segment vertical */
{
dwx = radius;
if( dy >= 0 )
dwx = -dwx;
sx1 = x1 - dwx;
sy1 = y1;
ex1 = x2 - dwx;
ey1 = y2;
DC->DrawLine( sx1, sy1, ex1, ey1 );
sx2 = x1 + dwx;
sy2 = y1;
ex2 = x2 + dwx;
ey2 = y2;
DC->DrawLine( sx2, sy2, ex2, ey2 );
}
else if( dy == 0 ) /* segment horizontal */
{
dwy = radius;
if( dx < 0 )
dwy = -dwy;
sx1 = x1;
sy1 = y1 - dwy;
ex1 = x2;
ey1 = y2 - dwy;
DC->DrawLine( sx1, sy1, ex1, ey1 );
sx2 = x1;
sy2 = y1 + dwy;
ex2 = x2;
ey2 = y2 + dwy;
DC->DrawLine( sx2, sy2, ex2, ey2 );
}
else
{
if( std::abs( dx ) == std::abs( dy ) ) // segment 45 degrees
{
dwx = dwy = ( (width * 5) + 4 ) / 7; // = width / 2 * 0.707
if( dy < 0 )
{
if( dx <= 0 )
{
dwx = -dwx; swap_ends = true;
}
}
else // dy >= 0
{
if( dx > 0 )
{
dwy = -dwy; swap_ends = true;
}
else
swap_ends = true;
}
}
else
{
int delta_angle = ArcTangente( dy, dx );
dwx = 0;
dwy = width;
RotatePoint( &dwx, &dwy, -delta_angle );
}
dwx2 = dwx >> 1;
dwy2 = dwy >> 1;
sx1 = x1 - dwx2;
sy1 = y1 - dwy2;
ex1 = x2 - dwx2;
ey1 = y2 - dwy2;
DC->DrawLine( sx1, sy1, ex1, ey1 );
sx2 = x1 + dwx2;
sy2 = y1 + dwy2;
ex2 = x2 + dwx2;
ey2 = y2 + dwy2;
DC->DrawLine( sx2, sy2, ex2, ey2 );
}
if( swap_ends )
{
DC->DrawArc( sx2, sy2, sx1, sy1, x1, y1 );
DC->DrawArc( ex1, ey1, ex2, ey2, x2, y2 );
}
else
{
DC->DrawArc( sx1, sy1, sx2, sy2, x1, y1 );
DC->DrawArc( ex2, ey2, ex1, ey1, x2, y2 );
}
}
void GRCSegm( EDA_RECT* ClipBox, wxDC* DC, int x1, int y1, int x2, int y2,
int width, EDA_COLOR_T Color )
{
GRCSegm( ClipBox, DC, x1, y1, x2, y2, width, 0, Color );
}
void GRCSegm( EDA_RECT* aClipBox, wxDC* aDC, wxPoint aStart, wxPoint aEnd,
int aWidth, EDA_COLOR_T aColor )
{
GRCSegm( aClipBox, aDC, aStart.x, aStart.y, aEnd.x, aEnd.y, aWidth, 0, aColor );
}
/*
* Draw segment (full) with rounded ends in object space (real coords.).
*/
void GRFillCSegm( EDA_RECT* ClipBox, wxDC* DC, int x1, int y1, int x2, int y2,
int width, EDA_COLOR_T Color )
{
WinClipAndDrawLine( ClipBox, DC, x1, y1, x2, y2, Color, width );
}
void GRFilledSegment( EDA_RECT* aClipBox, wxDC* aDC, wxPoint aStart, wxPoint aEnd,
int aWidth, EDA_COLOR_T aColor )
{
WinClipAndDrawLine( aClipBox, aDC, aStart.x, aStart.y, aEnd.x, aEnd.y, aColor, aWidth );
}
static bool IsGRSPolyDrawable( EDA_RECT* ClipBox, int n, wxPoint Points[] )
{
if( !ClipBox )
return true;
if( n <= 0 )
return false;
int Xmin, Xmax, Ymin, Ymax;
Xmin = Xmax = Points[0].x;
Ymin = Ymax = Points[0].y;
for( int ii = 1; ii < n; ii++ ) // calculate rectangle
{
Xmin = std::min( Xmin, Points[ii].x );
Xmax = std::max( Xmax, Points[ii].x );
Ymin = std::min( Ymin, Points[ii].y );
Ymax = std::max( Ymax, Points[ii].y );
}
xcliplo = ClipBox->GetX();
ycliplo = ClipBox->GetY();
xcliphi = ClipBox->GetRight();
ycliphi = ClipBox->GetBottom();
if( Xmax < xcliplo )
return false;
if( Xmin > xcliphi )
return false;
if( Ymax < ycliplo )
return false;
if( Ymin > ycliphi )
return false;
return true;
}
/*
* Draw a new polyline and fill it if Fill, in screen space.
*/
static void GRSPoly( EDA_RECT* ClipBox,
wxDC* DC,
int n,
wxPoint Points[],
bool Fill,
int width,
EDA_COLOR_T Color,
EDA_COLOR_T BgColor )
{
if( !IsGRSPolyDrawable( ClipBox, n, Points ) )
return;
GRSetColorPen( DC, Color, width );
if( Fill && ( n > 2 ) )
{
GRSetBrush( DC, BgColor, FILLED );
/* clip before send the filled polygon to wxDC, because under linux
* (GTK?) polygons having large coordinates are incorrectly drawn
*/
#ifdef USE_CLIP_FILLED_POLYGONS
ClipAndDrawFilledPoly( ClipBox, DC, Points, n );
#else
DC->DrawPolygon( n, Points ); // does not work very well under linux
#endif
}
else
{
wxPoint endPt = Points[n - 1];
GRSetBrush( DC, Color );
DC->DrawLines( n, Points );
// The last point is not drawn by DrawLine and DrawLines
// Add it if the polygon is not closed
if( endPt != Points[0] )
DC->DrawPoint( endPt.x, endPt.y );
}
}
/*
* Draw a new closed polyline and fill it if Fill, in screen space.
*/
static void GRSClosedPoly( EDA_RECT* ClipBox,
wxDC* DC,
int aPointCount,
wxPoint aPoints[],
bool Fill,
int width,
EDA_COLOR_T Color,
EDA_COLOR_T BgColor )
{
if( !IsGRSPolyDrawable( ClipBox, aPointCount, aPoints ) )
return;
GRSetColorPen( DC, Color, width );
if( Fill && ( aPointCount > 2 ) )
{
GRLastMoveToX = aPoints[aPointCount - 1].x;
GRLastMoveToY = aPoints[aPointCount - 1].y;
GRSetBrush( DC, BgColor, FILLED );
#ifdef USE_CLIP_FILLED_POLYGONS
ClipAndDrawFilledPoly( ClipBox, DC, aPoints, aPointCount );
#else
DC->DrawPolygon( aPointCount, aPoints ); // does not work very well under linux
#endif
}
else
{
GRSetBrush( DC, BgColor );
DC->DrawLines( aPointCount, aPoints );
/* Close the polygon. */
if( aPoints[aPointCount - 1] != aPoints[0] )
{
GRLine( ClipBox,
DC,
aPoints[0].x,
aPoints[0].y,
aPoints[aPointCount - 1].x,
aPoints[aPointCount - 1].y,
width,
Color );
}
}
}
/*
* Draw a new polyline and fill it if Fill, in drawing space.
*/
void GRPoly( EDA_RECT* ClipBox, wxDC* DC, int n, wxPoint Points[],
bool Fill, int width, EDA_COLOR_T Color, EDA_COLOR_T BgColor )
{
GRSPoly( ClipBox, DC, n, Points, Fill, width, Color, BgColor );
}
/*
* Draw a closed polyline and fill it if Fill, in object space.
*/
void GRClosedPoly( EDA_RECT* ClipBox, wxDC* DC, int n, wxPoint Points[],
bool Fill, EDA_COLOR_T Color, EDA_COLOR_T BgColor )
{
GRClosedPoly( ClipBox, DC, n, Points, Fill, 0, Color, BgColor );
}
void GRClosedPoly( EDA_RECT* ClipBox, wxDC* DC, int n, wxPoint Points[],
bool Fill, int width, EDA_COLOR_T Color, EDA_COLOR_T BgColor )
{
GRSClosedPoly( ClipBox, DC, n, Points, Fill, width, Color, BgColor );
}
void GRCircle( EDA_RECT* ClipBox, wxDC* DC, int xc, int yc, int r, int width, EDA_COLOR_T Color )
{
/* Clip circles off screen. */
if( ClipBox )
{
int x0, y0, xm, ym;
x0 = ClipBox->GetX();
y0 = ClipBox->GetY();
xm = ClipBox->GetRight();
ym = ClipBox->GetBottom();
if( xc < ( x0 - r - width ) )
return;
if( yc < ( y0 - r - width ) )
return;
if( xc > ( r + xm + width ) )
return;
if( yc > ( r + ym + width ) )
return;
}
GRSetColorPen( DC, Color, width );
GRSetBrush( DC, Color, false );
DC->DrawEllipse( xc - r, yc - r, r + r, r + r );
}
void GRCircle( EDA_RECT* ClipBox, wxDC* DC, int x, int y, int r, EDA_COLOR_T Color )
{
GRCircle( ClipBox, DC, x, y, r, 0, Color );
}
void GRCircle( EDA_RECT* aClipBox, wxDC* aDC, wxPoint aPos, int aRadius, int aWidth, EDA_COLOR_T aColor )
{
GRCircle( aClipBox, aDC, aPos.x, aPos.y, aRadius, aWidth, aColor );
}
void GRFilledCircle( EDA_RECT* ClipBox, wxDC* DC, int x, int y, int r,
int width, EDA_COLOR_T Color, EDA_COLOR_T BgColor )
{
/* Clip circles off screen. */
if( ClipBox )
{
int x0, y0, xm, ym;
x0 = ClipBox->GetX();
y0 = ClipBox->GetY();
xm = ClipBox->GetRight();
ym = ClipBox->GetBottom();
if( x < (x0 - r) )
return;
if( y < (y0 - r) )
return;
if( x > (r + xm) )
return;
if( y > (r + ym) )
return;
}
GRSetColorPen( DC, Color, width );
GRSetBrush( DC, BgColor, FILLED );
DC->DrawEllipse( x - r, y - r, r + r, r + r );
}
void GRFilledCircle( EDA_RECT* aClipBox, wxDC* aDC, wxPoint aPos, int aRadius, EDA_COLOR_T aColor )
{
GRFilledCircle( aClipBox, aDC, aPos.x, aPos.y, aRadius, 0, aColor, aColor );
}
/*
* Draw an arc in user space.
*/
void GRArc1( EDA_RECT* ClipBox, wxDC* DC, int x1, int y1, int x2, int y2,
int xc, int yc, EDA_COLOR_T Color )
{
GRArc1( ClipBox, DC, x1, y1, x2, y2, xc, yc, 0, Color );
}
/*
* Draw an arc, width = width in user space.
*/
void GRArc1( EDA_RECT* ClipBox, wxDC* DC, int x1, int y1, int x2, int y2,
int xc, int yc, int width, EDA_COLOR_T Color )
{
/* Clip arcs off screen. */
if( ClipBox )
{
int x0, y0, xm, ym, r;
x0 = ClipBox->GetX();
y0 = ClipBox->GetY();
xm = ClipBox->GetRight();
ym = ClipBox->GetBottom();
r = (int) hypot( x1 - xc, y1 - yc );
if( xc < ( x0 - r ) )
return;
if( yc < ( y0 - r ) )
return;
if( xc > ( r + xm ) )
return;
if( yc > ( r + ym ) )
return;
}
GRSetColorPen( DC, Color, width );
GRSetBrush( DC, Color );
DC->DrawArc( x1, y1, x2, y2, xc, yc );
}
void GRArc1( EDA_RECT* aClipBox, wxDC* aDC, wxPoint aStart, wxPoint aEnd,
wxPoint aCenter, int aWidth, EDA_COLOR_T aColor )
{
GRArc1( aClipBox, aDC, aStart.x, aStart.y, aEnd.x, aEnd.y, aCenter.x, aCenter.y,
aWidth, aColor );
}
/*
* Draw a filled arc in drawing space.
*/
void GRFilledArc( EDA_RECT* ClipBox,
wxDC* DC,
int x,
int y,
int StAngle,
int EndAngle,
int r,
int width,
EDA_COLOR_T Color,
EDA_COLOR_T BgColor )
{
int x1, y1, x2, y2;
/* Clip arcs off screen */
if( ClipBox )
{
int x0, y0, xm, ym;
x0 = ClipBox->GetX();
y0 = ClipBox->GetY();
xm = ClipBox->GetRight();
ym = ClipBox->GetBottom();
if( x < ( x0 - r - 1 ) )
return;
if( y < ( y0 - r - 1 ) )
return;
if( x > ( r + xm + 1 ) )
return;
if( y > ( r + ym + 1 ) )
return;
}
x1 = r;
y1 = 0;
RotatePoint( &x1, &y1, EndAngle );
x2 = r;
y2 = 0;
RotatePoint( &x2, &y2, StAngle );
GRSetBrush( DC, BgColor, FILLED );
GRSetColorPen( DC, Color, width );
DC->DrawArc( x + x1, y - y1, x + x2, y - y2, x, y );
}
void GRFilledArc( EDA_RECT* ClipBox, wxDC* DC, int x, int y,
int StAngle, int EndAngle, int r, EDA_COLOR_T Color, EDA_COLOR_T BgColor )
{
GRFilledArc( ClipBox, DC, x, y, StAngle, EndAngle, r, 0, Color, BgColor );
}
/*
* Draw an arc in drawing space.
*/
void GRArc( EDA_RECT* ClipBox, wxDC* DC, int xc, int yc, int StAngle,
int EndAngle, int r, EDA_COLOR_T Color )
{
int x1, y1, x2, y2;
/* Clip arcs off screen */
if( ClipBox )
{
int radius = r + 1;
int x0, y0, xm, ym, x, y;
x0 = ClipBox->GetX();
y0 = ClipBox->GetY();
xm = ClipBox->GetRight();
ym = ClipBox->GetBottom();
x = xc;
y = yc;
if( x < ( x0 - radius ) )
return;
if( y < ( y0 - radius ) )
return;
if( x > ( xm + radius ) )
return;
if( y > ( ym + radius ) )
return;
}
x1 = r;
y1 = 0;
RotatePoint( &x1, &y1, EndAngle );
x2 = r;
y2 = 0;
RotatePoint( &x2, &y2, StAngle );
GRSetColorPen( DC, Color );
GRSetBrush( DC, Color, false );
DC->DrawArc( xc + x1, yc - y1, xc + x2, yc - y2, xc, yc );
}
/*
* Draw an arc with width = width in drawing space.
*/
void GRArc( EDA_RECT* ClipBox,
wxDC* DC,
int x,
int y,
int StAngle,
int EndAngle,
int r,
int width,
EDA_COLOR_T Color )
{
int x1, y1, x2, y2;
/* Clip arcs off screen. */
if( ClipBox )
{
int x0, y0, xm, ym;
x0 = ClipBox->GetX();
y0 = ClipBox->GetY();
xm = ClipBox->GetRight();
ym = ClipBox->GetBottom();
if( x < ( x0 - r - width ) )
return;
if( y < ( y0 - r - width ) )
return;
if( x > ( r + xm + width ) )
return;
if( y > ( r + ym + width ) )
return;
}
x1 = r;
y1 = 0;
RotatePoint( &x1, &y1, EndAngle );
x2 = r;
y2 = 0;
RotatePoint( &x2, &y2, StAngle );
GRSetColorPen( DC, Color, width );
GRSetBrush( DC, Color );
DC->DrawArc( x + x1, y - y1, x + x2, y - y2, x, y );
}
/*
* Draw a rectangle in drawing space.
*/
void GRRect( EDA_RECT* aClipBox, wxDC* aDC, int x1, int y1, int x2, int y2, EDA_COLOR_T aColor )
{
GRSRect( aClipBox, aDC, x1, y1, x2, y2, 0, aColor );
}
void GRRectPs( EDA_RECT* aClipBox, wxDC* aDC, const EDA_RECT& aRect, EDA_COLOR_T aColor, wxPenStyle aStyle )
{
int x1 = aRect.GetX();
int y1 = aRect.GetY();
int x2 = aRect.GetRight();
int y2 = aRect.GetBottom();
GRSRect( aClipBox, aDC, x1, y1, x2, y2, 0, aColor, aStyle );
}
/*
* Draw a rectangle (thick lines) in drawing space.
*/
void GRRect( EDA_RECT* ClipBox, wxDC* DC, int x1, int y1, int x2, int y2, int width, EDA_COLOR_T Color )
{
GRSRect( ClipBox, DC, x1, y1, x2, y2, width, Color );
}
void GRRect( EDA_RECT* aClipBox, wxDC* aDC, const EDA_RECT& aRect, int aWidth, EDA_COLOR_T aColor )
{
int x1 = aRect.GetX();
int y1 = aRect.GetY();
int x2 = aRect.GetRight();
int y2 = aRect.GetBottom();
GRSRect( aClipBox, aDC, x1, y1, x2, y2, aWidth, aColor );
}
/*
* Draw a rectangle (filled with AreaColor) in drawing space.
*/
void GRFilledRect( EDA_RECT* ClipBox, wxDC* DC, int x1, int y1, int x2, int y2,
EDA_COLOR_T Color, EDA_COLOR_T BgColor )
{
GRSFilledRect( ClipBox, DC, x1, y1, x2, y2, 0, Color, BgColor );
}
/*
* Draw a rectangle (filled with AreaColor) in drawing space.
*/
void GRFilledRect( EDA_RECT* ClipBox, wxDC* DC, int x1, int y1, int x2, int y2,
int width, EDA_COLOR_T Color, EDA_COLOR_T BgColor )
{
GRSFilledRect( ClipBox, DC, x1, y1, x2, y2, width, Color, BgColor );
}
/*
* Draw a rectangle in screen space.
*/
void GRSRect( EDA_RECT* aClipBox, wxDC* aDC, int x1, int y1, int x2, int y2,
int aWidth, EDA_COLOR_T aColor, wxPenStyle aStyle )
{
wxPoint points[5];
points[0] = wxPoint(x1, y1);
points[1] = wxPoint(x1, y2);
points[2] = wxPoint(x2, y2);
points[3] = wxPoint(x2, y1);
points[4] = points[0];
GRSetColorPen( aDC, aColor, aWidth, aStyle );
GRSetBrush( aDC, BLACK );
if( aClipBox )
{
EDA_RECT clipbox(*aClipBox);
clipbox.Inflate(aWidth);
ClipAndDrawFilledPoly(&clipbox, aDC, points, 5); // polygon approach is more accurate
}
else
ClipAndDrawFilledPoly(aClipBox, aDC, points, 5);
}
void GRSFilledRect( EDA_RECT* aClipBox, wxDC* aDC, int x1, int y1, int x2, int y2,
int aWidth, EDA_COLOR_T aColor, EDA_COLOR_T aBgColor )
{
wxPoint points[5];
points[0] = wxPoint(x1, y1);
points[1] = wxPoint(x1, y2);
points[2] = wxPoint(x2, y2);
points[3] = wxPoint(x2, y1);
points[4] = points[0];
GRSetBrush( aDC, aBgColor, FILLED );
GRSetColorPen( aDC, aBgColor, aWidth );
if( aClipBox && (aWidth > 0) )
{
EDA_RECT clipbox(*aClipBox);
clipbox.Inflate(aWidth);
ClipAndDrawFilledPoly(&clipbox, aDC, points, 5); // polygon approach is more accurate
}
else
ClipAndDrawFilledPoly(aClipBox, aDC, points, 5);
}
#ifdef USE_CLIP_FILLED_POLYGONS
/**
* Function ClipAndDrawFilledPoly
* Used to clip a polygon and draw it as Filled Polygon
* uses the Sutherland and Hodgman algo to clip the given poly against a
* rectangle. This rectangle is the drawing area this is useful under
* Linux (2009) because filled polygons are incorrectly drawn if they have
* too large coordinates (seems due to integer overflows in calculations)
* Could be removed in some years, if become unnecessary.
*/
/* Note: aClipBox == NULL is legal, so if aClipBox == NULL,
* the polygon is drawn, but not clipped
*/
#include <SutherlandHodgmanClipPoly.h>
void ClipAndDrawFilledPoly( EDA_RECT* aClipBox, wxDC* aDC, wxPoint aPoints[], int n )
{
if( aClipBox == NULL )
{
aDC->DrawPolygon( n, aPoints );
return;
}
// A clip box exists: clip and draw the polygon.
static vector<wxPoint> clippedPolygon;
static pointVector inputPolygon, outputPolygon;
inputPolygon.clear();
outputPolygon.clear();
clippedPolygon.clear();
for( int ii = 0; ii < n; ii++ )
inputPolygon.push_back( PointF( (REAL) aPoints[ii].x, (REAL) aPoints[ii].y ) );
RectF window( (REAL) aClipBox->GetX(), (REAL) aClipBox->GetY(),
(REAL) aClipBox->GetWidth(), (REAL) aClipBox->GetHeight() );
SutherlandHodgman sh( window );
sh.Clip( inputPolygon, outputPolygon );
for( cpointIterator cit = outputPolygon.begin(); cit != outputPolygon.end(); ++cit )
{
clippedPolygon.push_back( wxPoint( KiROUND( cit->X ), KiROUND( cit->Y ) ) );
}
if( clippedPolygon.size() )
aDC->DrawPolygon( clippedPolygon.size(), &clippedPolygon[0] );
}
#endif
void GRBezier( EDA_RECT* ClipBox,
wxDC* DC,
int x1,
int y1,
int x2,
int y2,
int x3,
int y3,
int width,
EDA_COLOR_T Color )
{
std::vector<wxPoint> Points = Bezier2Poly( x1, y1, x2, y2, x3, y3 );
GRPoly( ClipBox, DC, Points.size(), &Points[0], false, width, Color, Color );
}
void GRBezier( EDA_RECT* ClipBox,
wxDC* DC,
int x1,
int y1,
int x2,
int y2,
int x3,
int y3,
int x4,
int y4,
int width,
EDA_COLOR_T Color )
{
std::vector<wxPoint> Points = Bezier2Poly( x1, y1, x2, y2, x3, y3, x4, y4 );
GRPoly( ClipBox, DC, Points.size(), &Points[0], false, width, Color, Color );
}
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