src/mac/dcclient.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        dcclient.cpp
// Purpose:     wxClientDC class
// Author:      AUTHOR
// Modified by:
// Created:     01/02/97
// RCS-ID:      $Id$
// Copyright:   (c) AUTHOR
// Licence:   	wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#ifdef __GNUG__
#pragma implementation "dcclient.h"
#endif

#include "wx/dcclient.h"
#include "wx/dcmemory.h"
#include "wx/region.h"
#include <math.h>

//-----------------------------------------------------------------------------
// constants
//-----------------------------------------------------------------------------

#define RAD2DEG 57.2957795131

//-----------------------------------------------------------------------------
// wxPaintDC
//-----------------------------------------------------------------------------

#if !USE_SHARED_LIBRARY
IMPLEMENT_DYNAMIC_CLASS(wxWindowDC, wxDC)
IMPLEMENT_DYNAMIC_CLASS(wxClientDC, wxWindowDC)
IMPLEMENT_DYNAMIC_CLASS(wxPaintDC, wxWindowDC)
#endif

/*
 * wxWindowDC
 */

wxWindowDC::wxWindowDC(void)
{
};

wxWindowDC::wxWindowDC( wxWindow *window )
{
};

wxWindowDC::~wxWindowDC(void)
{
};

void wxWindowDC::FloodFill( long WXUNUSED(x1), long WXUNUSED(y1),
  const wxColour& WXUNUSED(col), int WXUNUSED(style) )
{
};

bool wxWindowDC::GetPixel( long WXUNUSED(x1), long WXUNUSED(y1), wxColour *WXUNUSED(col) ) const
{
  return FALSE;
};

void wxWindowDC::DrawLine( long x1, long y1, long x2, long y2 )
{
  if (!Ok()) return;

};

void wxWindowDC::CrossHair( long x, long y )
{
  if (!Ok()) return;

};

void wxWindowDC::DrawArc( long x1, long y1, long x2, long y2, long xc, long yc )
{
  if (!Ok()) return;

  long xx1 = XLOG2DEV(x1);
  long yy1 = YLOG2DEV(y1);
  long xx2 = XLOG2DEV(x2);
  long yy2 = YLOG2DEV(y2);
  long xxc = XLOG2DEV((long)xc);
  long yyc = YLOG2DEV((long)yc);
  double dx = xx1 - xxc;
  double dy = yy1 - yyc;
  double radius = sqrt(dx*dx+dy*dy);
  long   r      = (long)radius;
  double radius1, radius2;

  if (xx1 == xx2 && yy1 == yy2)
  {
    radius1 = 0.0;
    radius2 = 360.0;
  }
  else
  if (radius == 0.0)
  {
    radius1 = radius2 = 0.0;
  }
  else
  {
    radius1 = (xx1 - xxc == 0) ?
	    (yy1 - yyc < 0) ? 90.0 : -90.0 :
	    -atan2(double(yy1-yyc), double(xx1-xxc)) * RAD2DEG;
    radius2 = (xx2 - xxc == 0) ?
	    (yy2 - yyc < 0) ? 90.0 : -90.0 :
	    -atan2(double(yy2-yyc), double(xx2-xxc)) * RAD2DEG;
  };
  long alpha1 = long(radius1 * 64.0);
  long alpha2 = long((radius2 - radius1) * 64.0);
  while (alpha2 <= 0) alpha2 += 360*64;
  while (alpha1 > 360*64) alpha1 -= 360*64;

  if (m_brush.GetStyle() != wxTRANSPARENT) {};

  if (m_pen.GetStyle() != wxTRANSPARENT) {};

};

void wxWindowDC::DrawEllipticArc( long x, long y, long width, long height, double sa, double ea )
{
  if (!Ok()) return;

  long xx = XLOG2DEV(x);
  long yy = YLOG2DEV(y);
  long ww = m_signX * XLOG2DEVREL(width);
  long hh = m_signY * YLOG2DEVREL(height);

  // CMB: handle -ve width and/or height
  if (ww < 0) { ww = -ww; xx = xx - ww; }
  if (hh < 0) { hh = -hh; yy = yy - hh; }

  long start = long(sa * 64.0);
  long end = long(ea * 64.0);
  if (m_brush.GetStyle() != wxTRANSPARENT) {};

  if (m_pen.GetStyle() != wxTRANSPARENT) {};
};

void wxWindowDC::DrawPoint( long x, long y )
{
  if (!Ok()) return;

  if (m_pen.GetStyle() != wxTRANSPARENT) {};
};

void wxWindowDC::DrawLines( int n, wxPoint points[], long xoffset, long yoffset )
{
  if (!Ok()) return;

  if (m_pen.GetStyle() == wxTRANSPARENT) return;

  for (int i = 0; i < n-1; i++)
  {
    long x1 = XLOG2DEV(points[i].x + xoffset);
    long x2 = XLOG2DEV(points[i+1].x + xoffset);
    long y1 = YLOG2DEV(points[i].y + yoffset);     // oh, what a waste
    long y2 = YLOG2DEV(points[i+1].y + yoffset);
  };
};

void wxWindowDC::DrawLines( wxList *points, long xoffset, long yoffset )
{
  if (!Ok()) return;

  if (m_pen.GetStyle() == wxTRANSPARENT) return;

  wxNode *node = points->First();
  while (node->Next())
  {
    wxPoint *point = (wxPoint*)node->Data();
    wxPoint *npoint = (wxPoint*)node->Next()->Data();
    long x1 = XLOG2DEV(point->x + xoffset);
    long x2 = XLOG2DEV(npoint->x + xoffset);
    long y1 = YLOG2DEV(point->y + yoffset);    // and again...
    long y2 = YLOG2DEV(npoint->y + yoffset);
    node = node->Next();
  };
};

void wxWindowDC::DrawPolygon( int WXUNUSED(n), wxPoint WXUNUSED(points)[],
  long WXUNUSED(xoffset), long WXUNUSED(yoffset), int WXUNUSED(fillStyle) )
{
  if (!Ok()) return;
};

void wxWindowDC::DrawPolygon( wxList *WXUNUSED(lines), long WXUNUSED(xoffset),
                             long WXUNUSED(yoffset), int WXUNUSED(fillStyle) )
{
  if (!Ok()) return;
};

void wxWindowDC::DrawRectangle( long x, long y, long width, long height )
{
  if (!Ok()) return;

  long xx = XLOG2DEV(x);
  long yy = YLOG2DEV(y);
  long ww = m_signX * XLOG2DEVREL(width);
  long hh = m_signY * YLOG2DEVREL(height);

  // CMB: draw nothing if transformed w or h is 0
  if (ww == 0 || hh == 0) return;

  // CMB: handle -ve width and/or height
  if (ww < 0) { ww = -ww; xx = xx - ww; }
  if (hh < 0) { hh = -hh; yy = yy - hh; }

  if (m_brush.GetStyle() != wxTRANSPARENT) {};

  if (m_pen.GetStyle() != wxTRANSPARENT) {};
};

void wxWindowDC::DrawRoundedRectangle( long x, long y, long width, long height, double radius )
{
  if (!Ok()) return;

  if (radius < 0.0) radius = - radius * ((width < height) ? width : height);

  long xx = XLOG2DEV(x);
  long yy = YLOG2DEV(y);
  long ww = m_signX * XLOG2DEVREL(width);
  long hh = m_signY * YLOG2DEVREL(height);
  long rr = XLOG2DEVREL((long)radius);

  // CMB: handle -ve width and/or height
  if (ww < 0) { ww = -ww; xx = xx - ww; }
  if (hh < 0) { hh = -hh; yy = yy - hh; }

  // CMB: if radius is zero use DrawRectangle() instead to avoid
  // X drawing errors with small radii
  if (rr == 0)
  {
    DrawRectangle( x, y, width, height );
    return;
  }

  // CMB: draw nothing if transformed w or h is 0
  if (ww == 0 || hh == 0) return;

  // CMB: adjust size if outline is drawn otherwise the result is
  // 1 pixel too wide and high
  if (m_pen.GetStyle() != wxTRANSPARENT)
  {
    ww--;
    hh--;
  }

  // CMB: ensure dd is not larger than rectangle otherwise we
  // get an hour glass shape
  long dd = 2 * rr;
  if (dd > ww) dd = ww;
  if (dd > hh) dd = hh;
  rr = dd / 2;

  if (m_brush.GetStyle() != wxTRANSPARENT)
  {
  };

  if (m_pen.GetStyle() != wxTRANSPARENT)
  {
  };
};

void wxWindowDC::DrawEllipse( long x, long y, long width, long height )
{
  if (!Ok()) return;

  long xx = XLOG2DEV(x);
  long yy = YLOG2DEV(y);
  long ww = m_signX * XLOG2DEVREL(width);
  long hh = m_signY * YLOG2DEVREL(height);

  // CMB: handle -ve width and/or height
  if (ww < 0) { ww = -ww; xx = xx - ww; }
  if (hh < 0) { hh = -hh; yy = yy - hh; }

  if (m_brush.GetStyle() != wxTRANSPARENT) {};

  if (m_pen.GetStyle() != wxTRANSPARENT) {};
};

bool wxWindowDC::CanDrawBitmap(void) const
{
  return TRUE;
};

void wxWindowDC::DrawIcon( const wxIcon &icon, long x, long y, bool useMask )
{
  if (!Ok()) return;

  if (!icon.Ok()) return;

  int xx = XLOG2DEV(x);
  int yy = YLOG2DEV(y);

};

bool wxWindowDC::Blit( long xdest, long ydest, long width, long height,
       wxDC *source, long xsrc, long ysrc, int WXUNUSED(logical_func), bool WXUNUSED(useMask) )
{
  if (!Ok()) return FALSE;

  // CMB 20/5/98: add blitting of bitmaps
  if (source->IsKindOf(CLASSINFO(wxMemoryDC)))
  {
    wxMemoryDC* srcDC = (wxMemoryDC*)source;
    /*
     GdkBitmap* bmap = srcDC->m_selected.GetBitmap();
    if (bmap)
    {
      gdk_draw_bitmap (
          m_window,
          m_textGC,
          bmap,
          source->DeviceToLogicalX(xsrc), source->DeviceToLogicalY(ysrc),
          XLOG2DEV(xdest), YLOG2DEV(ydest),
          source->DeviceToLogicalXRel(width), source->DeviceToLogicalYRel(height)
          );
      return TRUE;
    }
    */
  }

  return TRUE;
};

void wxWindowDC::DrawText( const wxString &text, long x, long y, bool
WXUNUSED(use16) )
{
  if (!Ok()) return;

};


bool wxWindowDC::CanGetTextExtent(void) const
{
  return TRUE;
};

void wxWindowDC::GetTextExtent( const wxString &string, long *width, long *height,
                     long *WXUNUSED(descent), long *WXUNUSED(externalLeading),
                     wxFont *WXUNUSED(theFont), bool WXUNUSED(use16) )
{
  if (!Ok()) return;

};

long wxWindowDC::GetCharWidth(void)
{
  if (!Ok()) return 0;
  return 0;
};

long wxWindowDC::GetCharHeight(void)
{
  if (!Ok()) return 0;
  return 0;
};

void wxWindowDC::Clear(void)
{
  if (!Ok()) return;

};

void wxWindowDC::SetFont( const wxFont &font )
{
  if (!Ok()) return;

  m_font = font;
};

void wxWindowDC::SetPen( const wxPen &pen )
{
  if (!Ok()) return;

  if (m_pen == pen) return;

  m_pen = pen;

  if (!m_pen.Ok()) return;
};

void wxWindowDC::SetBrush( const wxBrush &brush )
{
  if (!Ok()) return;

  if (m_brush == brush) return;

  m_brush = brush;

  if (!m_brush.Ok()) return;

};

void wxWindowDC::SetBackground( const wxBrush &brush )
{
  if (!Ok()) return;

  if (m_backgroundBrush == brush) return;

  m_backgroundBrush = brush;

  if (!m_backgroundBrush.Ok()) return;

};

void wxWindowDC::SetLogicalFunction( int function )
{
  if (m_logicalFunction == function) return;
};

void wxWindowDC::SetTextForeground( const wxColour &col )
{
  if (!Ok()) return;

  if (m_textForegroundColour == col) return;

  m_textForegroundColour = col;
  if (!m_textForegroundColour.Ok()) return;
};

void wxWindowDC::SetTextBackground( const wxColour &col )
{
  if (!Ok()) return;

  if (m_textBackgroundColour == col) return;

  m_textBackgroundColour = col;
  if (!m_textBackgroundColour.Ok()) return;
};

void wxWindowDC::SetBackgroundMode( int mode )
{
  m_backgroundMode = mode;

  if (m_brush.GetStyle() != wxSOLID && m_brush.GetStyle() != wxTRANSPARENT)
  {
  }
};

void wxWindowDC::SetPalette( const wxPalette& WXUNUSED(palette) )
{
};

void wxWindowDC::SetClippingRegion( long x, long y, long width, long height )
{
  wxDC::SetClippingRegion( x, y, width, height );

  // TODO

};

void wxWindowDC::SetClippingRegion( const wxRegion& region )
{
  wxRect box = region.GetBox();

  wxDC::SetClippingRegion( box.x, box.y, box.width, box.height );

  // TODO
}

void wxWindowDC::DestroyClippingRegion(void)
{
  wxDC::DestroyClippingRegion();

};

// ----------------------------------- spline code ----------------------------------------

void wx_quadratic_spline(double a1, double b1, double a2, double b2,
                         double a3, double b3, double a4, double b4);
void wx_clear_stack(void);
int wx_spline_pop(double *x1, double *y1, double *x2, double *y2, double *x3,
        double *y3, double *x4, double *y4);
void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3,
          double x4, double y4);
static bool wx_spline_add_point(double x, double y);
static void wx_spline_draw_point_array(wxDC *dc);

wxList wx_spline_point_list;

#define		half(z1, z2)	((z1+z2)/2.0)
#define		THRESHOLD	5

/* iterative version */

void wx_quadratic_spline(double a1, double b1, double a2, double b2, double a3, double b3, double a4,
                 double b4)
{
    register double  xmid, ymid;
    double           x1, y1, x2, y2, x3, y3, x4, y4;

    wx_clear_stack();
    wx_spline_push(a1, b1, a2, b2, a3, b3, a4, b4);

    while (wx_spline_pop(&x1, &y1, &x2, &y2, &x3, &y3, &x4, &y4)) {
        xmid = (double)half(x2, x3);
        ymid = (double)half(y2, y3);
	if (fabs(x1 - xmid) < THRESHOLD && fabs(y1 - ymid) < THRESHOLD &&
	    fabs(xmid - x4) < THRESHOLD && fabs(ymid - y4) < THRESHOLD) {
            wx_spline_add_point( x1, y1 );
            wx_spline_add_point( xmid, ymid );
	} else {
            wx_spline_push(xmid, ymid, (double)half(xmid, x3), (double)half(ymid, y3),
                 (double)half(x3, x4), (double)half(y3, y4), x4, y4);
            wx_spline_push(x1, y1, (double)half(x1, x2), (double)half(y1, y2),
                 (double)half(x2, xmid), (double)half(y2, ymid), xmid, ymid);
	}
    }
}

/* utilities used by spline drawing routines */

typedef struct wx_spline_stack_struct {
    double           x1, y1, x2, y2, x3, y3, x4, y4;
} Stack;

#define         SPLINE_STACK_DEPTH             20
static Stack    wx_spline_stack[SPLINE_STACK_DEPTH];
static Stack   *wx_stack_top;
static int      wx_stack_count;

void wx_clear_stack(void)
{
    wx_stack_top = wx_spline_stack;
    wx_stack_count = 0;
}

void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4)
{
    wx_stack_top->x1 = x1;
    wx_stack_top->y1 = y1;
    wx_stack_top->x2 = x2;
    wx_stack_top->y2 = y2;
    wx_stack_top->x3 = x3;
    wx_stack_top->y3 = y3;
    wx_stack_top->x4 = x4;
    wx_stack_top->y4 = y4;
    wx_stack_top++;
    wx_stack_count++;
}

int wx_spline_pop(double *x1, double *y1, double *x2, double *y2,
                  double *x3, double *y3, double *x4, double *y4)
{
    if (wx_stack_count == 0)
	return (0);
    wx_stack_top--;
    wx_stack_count--;
    *x1 = wx_stack_top->x1;
    *y1 = wx_stack_top->y1;
    *x2 = wx_stack_top->x2;
    *y2 = wx_stack_top->y2;
    *x3 = wx_stack_top->x3;
    *y3 = wx_stack_top->y3;
    *x4 = wx_stack_top->x4;
    *y4 = wx_stack_top->y4;
    return (1);
}

static bool wx_spline_add_point(double x, double y)
{
  wxPoint *point = new wxPoint ;
  point->x = (int) x;
  point->y = (int) y;
  wx_spline_point_list.Append((wxObject*)point);
  return TRUE;
}

static void wx_spline_draw_point_array(wxDC *dc)
{
  dc->DrawLines(&wx_spline_point_list, 0, 0 );
  wxNode *node = wx_spline_point_list.First();
  while (node)
  {
    wxPoint *point = (wxPoint *)node->Data();
    delete point;
    delete node;
    node = wx_spline_point_list.First();
  }
}

void wxWindowDC::DrawSpline( wxList *points )
{
    wxPoint *p;
    double           cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4;
    double           x1, y1, x2, y2;

    wxNode *node = points->First();
    p = (wxPoint *)node->Data();

    x1 = p->x;
    y1 = p->y;

    node = node->Next();
    p = (wxPoint *)node->Data();

    x2 = p->x;
    y2 = p->y;
    cx1 = (double)((x1 + x2) / 2);
    cy1 = (double)((y1 + y2) / 2);
    cx2 = (double)((cx1 + x2) / 2);
    cy2 = (double)((cy1 + y2) / 2);

    wx_spline_add_point(x1, y1);

    while ((node = node->Next()) != NULL)
    {
        p = (wxPoint *)node->Data();
	x1 = x2;
	y1 = y2;
	x2 = p->x;
	y2 = p->y;
        cx4 = (double)(x1 + x2) / 2;
        cy4 = (double)(y1 + y2) / 2;
        cx3 = (double)(x1 + cx4) / 2;
        cy3 = (double)(y1 + cy4) / 2;

        wx_quadratic_spline(cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4);

	cx1 = cx4;
	cy1 = cy4;
        cx2 = (double)(cx1 + x2) / 2;
        cy2 = (double)(cy1 + y2) / 2;
    }

    wx_spline_add_point( cx1, cy1 );
    wx_spline_add_point( x2, y2 );

    wx_spline_draw_point_array( this );
};
Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: dcclient.cpp
	3	// Purpose: wxClientDC class
	4	// Author: AUTHOR
	5	// Modified by:
	6	// Created: 01/02/97
	7	// RCS-ID: $Id$
	8	// Copyright: (c) AUTHOR
	9	// Licence: wxWindows licence
	10	/////////////////////////////////////////////////////////////////////////////
	11
	12	#ifdef __GNUG__
	13	#pragma implementation "dcclient.h"
	14	#endif
	15
	16	#include "wx/dcclient.h"
	17	#include "wx/dcmemory.h"
	18	#include "wx/region.h"
	19	#include <math.h>
	20
	21	//-----------------------------------------------------------------------------
	22	// constants
	23	//-----------------------------------------------------------------------------
	24
	25	#define RAD2DEG 57.2957795131
	26
	27	//-----------------------------------------------------------------------------
	28	// wxPaintDC
	29	//-----------------------------------------------------------------------------
	30
	31	#if !USE_SHARED_LIBRARY
	32	IMPLEMENT_DYNAMIC_CLASS(wxWindowDC, wxDC)
	33	IMPLEMENT_DYNAMIC_CLASS(wxClientDC, wxWindowDC)
	34	IMPLEMENT_DYNAMIC_CLASS(wxPaintDC, wxWindowDC)
	35	#endif
	36
	37	/*
	38	* wxWindowDC
	39	*/
	40
	41	wxWindowDC::wxWindowDC(void)
	42	{
	43	};
	44
	45	wxWindowDC::wxWindowDC( wxWindow *window )
	46	{
	47	};
	48
	49	wxWindowDC::~wxWindowDC(void)
	50	{
	51	};
	52
	53	void wxWindowDC::FloodFill( long WXUNUSED(x1), long WXUNUSED(y1),
	54	const wxColour& WXUNUSED(col), int WXUNUSED(style) )
	55	{
	56	};
	57
	58	bool wxWindowDC::GetPixel( long WXUNUSED(x1), long WXUNUSED(y1), wxColour *WXUNUSED(col) ) const
	59	{
	60	return FALSE;
	61	};
	62
	63	void wxWindowDC::DrawLine( long x1, long y1, long x2, long y2 )
	64	{
	65	if (!Ok()) return;
	66
	67	};
	68
	69	void wxWindowDC::CrossHair( long x, long y )
	70	{
	71	if (!Ok()) return;
	72
	73	};
	74
	75	void wxWindowDC::DrawArc( long x1, long y1, long x2, long y2, long xc, long yc )
	76	{
	77	if (!Ok()) return;
	78
	79	long xx1 = XLOG2DEV(x1);
	80	long yy1 = YLOG2DEV(y1);
	81	long xx2 = XLOG2DEV(x2);
	82	long yy2 = YLOG2DEV(y2);
	83	long xxc = XLOG2DEV((long)xc);
	84	long yyc = YLOG2DEV((long)yc);
	85	double dx = xx1 - xxc;
	86	double dy = yy1 - yyc;
	87	double radius = sqrt(dxdx+dydy);
	88	long r = (long)radius;
	89	double radius1, radius2;
	90
	91	if (xx1 == xx2 && yy1 == yy2)
	92	{
	93	radius1 = 0.0;
	94	radius2 = 360.0;
	95	}
	96	else
	97	if (radius == 0.0)
	98	{
	99	radius1 = radius2 = 0.0;
	100	}
	101	else
	102	{
	103	radius1 = (xx1 - xxc == 0) ?
	104	(yy1 - yyc < 0) ? 90.0 : -90.0 :
	105	-atan2(double(yy1-yyc), double(xx1-xxc)) * RAD2DEG;
	106	radius2 = (xx2 - xxc == 0) ?
	107	(yy2 - yyc < 0) ? 90.0 : -90.0 :
	108	-atan2(double(yy2-yyc), double(xx2-xxc)) * RAD2DEG;
	109	};
	110	long alpha1 = long(radius1 * 64.0);
	111	long alpha2 = long((radius2 - radius1) * 64.0);
	112	while (alpha2 <= 0) alpha2 += 360*64;
	113	while (alpha1 > 36064) alpha1 -= 36064;
	114
	115	if (m_brush.GetStyle() != wxTRANSPARENT) {};
	116
	117	if (m_pen.GetStyle() != wxTRANSPARENT) {};
	118
	119	};
	120
	121	void wxWindowDC::DrawEllipticArc( long x, long y, long width, long height, double sa, double ea )
	122	{
	123	if (!Ok()) return;
	124
	125	long xx = XLOG2DEV(x);
	126	long yy = YLOG2DEV(y);
	127	long ww = m_signX * XLOG2DEVREL(width);
	128	long hh = m_signY * YLOG2DEVREL(height);
	129
	130	// CMB: handle -ve width and/or height
	131	if (ww < 0) { ww = -ww; xx = xx - ww; }
	132	if (hh < 0) { hh = -hh; yy = yy - hh; }
	133
	134	long start = long(sa * 64.0);
	135	long end = long(ea * 64.0);
	136	if (m_brush.GetStyle() != wxTRANSPARENT) {};
	137
	138	if (m_pen.GetStyle() != wxTRANSPARENT) {};
	139	};
	140
	141	void wxWindowDC::DrawPoint( long x, long y )
	142	{
	143	if (!Ok()) return;
	144
	145	if (m_pen.GetStyle() != wxTRANSPARENT) {};
	146	};
	147
	148	void wxWindowDC::DrawLines( int n, wxPoint points[], long xoffset, long yoffset )
	149	{
	150	if (!Ok()) return;
	151
	152	if (m_pen.GetStyle() == wxTRANSPARENT) return;
	153
	154	for (int i = 0; i < n-1; i++)
	155	{
	156	long x1 = XLOG2DEV(points[i].x + xoffset);
	157	long x2 = XLOG2DEV(points[i+1].x + xoffset);
	158	long y1 = YLOG2DEV(points[i].y + yoffset); // oh, what a waste
	159	long y2 = YLOG2DEV(points[i+1].y + yoffset);
	160	};
	161	};
	162
	163	void wxWindowDC::DrawLines( wxList *points, long xoffset, long yoffset )
	164	{
	165	if (!Ok()) return;
	166
	167	if (m_pen.GetStyle() == wxTRANSPARENT) return;
	168
	169	wxNode *node = points->First();
	170	while (node->Next())
	171	{
	172	wxPoint point = (wxPoint)node->Data();
	173	wxPoint npoint = (wxPoint)node->Next()->Data();
	174	long x1 = XLOG2DEV(point->x + xoffset);
	175	long x2 = XLOG2DEV(npoint->x + xoffset);
	176	long y1 = YLOG2DEV(point->y + yoffset); // and again...
	177	long y2 = YLOG2DEV(npoint->y + yoffset);
	178	node = node->Next();
	179	};
	180	};
	181
	182	void wxWindowDC::DrawPolygon( int WXUNUSED(n), wxPoint WXUNUSED(points)[],
	183	long WXUNUSED(xoffset), long WXUNUSED(yoffset), int WXUNUSED(fillStyle) )
	184	{
	185	if (!Ok()) return;
	186	};
	187
	188	void wxWindowDC::DrawPolygon( wxList *WXUNUSED(lines), long WXUNUSED(xoffset),
	189	long WXUNUSED(yoffset), int WXUNUSED(fillStyle) )
	190	{
	191	if (!Ok()) return;
	192	};
	193
	194	void wxWindowDC::DrawRectangle( long x, long y, long width, long height )
	195	{
	196	if (!Ok()) return;
	197
	198	long xx = XLOG2DEV(x);
	199	long yy = YLOG2DEV(y);
	200	long ww = m_signX * XLOG2DEVREL(width);
	201	long hh = m_signY * YLOG2DEVREL(height);
	202
	203	// CMB: draw nothing if transformed w or h is 0
	204	if (ww == 0 \|\| hh == 0) return;
	205
	206	// CMB: handle -ve width and/or height
	207	if (ww < 0) { ww = -ww; xx = xx - ww; }
	208	if (hh < 0) { hh = -hh; yy = yy - hh; }
	209
	210	if (m_brush.GetStyle() != wxTRANSPARENT) {};
	211
	212	if (m_pen.GetStyle() != wxTRANSPARENT) {};
	213	};
	214
	215	void wxWindowDC::DrawRoundedRectangle( long x, long y, long width, long height, double radius )
	216	{
	217	if (!Ok()) return;
	218
	219	if (radius < 0.0) radius = - radius * ((width < height) ? width : height);
	220
	221	long xx = XLOG2DEV(x);
	222	long yy = YLOG2DEV(y);
	223	long ww = m_signX * XLOG2DEVREL(width);
	224	long hh = m_signY * YLOG2DEVREL(height);
	225	long rr = XLOG2DEVREL((long)radius);
	226
	227	// CMB: handle -ve width and/or height
	228	if (ww < 0) { ww = -ww; xx = xx - ww; }
	229	if (hh < 0) { hh = -hh; yy = yy - hh; }
	230
	231	// CMB: if radius is zero use DrawRectangle() instead to avoid
	232	// X drawing errors with small radii
	233	if (rr == 0)
	234	{
	235	DrawRectangle( x, y, width, height );
	236	return;
	237	}
	238
	239	// CMB: draw nothing if transformed w or h is 0
	240	if (ww == 0 \|\| hh == 0) return;
	241
	242	// CMB: adjust size if outline is drawn otherwise the result is
	243	// 1 pixel too wide and high
	244	if (m_pen.GetStyle() != wxTRANSPARENT)
	245	{
	246	ww--;
	247	hh--;
	248	}
	249
	250	// CMB: ensure dd is not larger than rectangle otherwise we
	251	// get an hour glass shape
	252	long dd = 2 * rr;
	253	if (dd > ww) dd = ww;
	254	if (dd > hh) dd = hh;
	255	rr = dd / 2;
	256
	257	if (m_brush.GetStyle() != wxTRANSPARENT)
	258	{
	259	};
	260
	261	if (m_pen.GetStyle() != wxTRANSPARENT)
	262	{
	263	};
	264	};
	265
	266	void wxWindowDC::DrawEllipse( long x, long y, long width, long height )
	267	{
	268	if (!Ok()) return;
	269
	270	long xx = XLOG2DEV(x);
	271	long yy = YLOG2DEV(y);
	272	long ww = m_signX * XLOG2DEVREL(width);
	273	long hh = m_signY * YLOG2DEVREL(height);
	274
	275	// CMB: handle -ve width and/or height
	276	if (ww < 0) { ww = -ww; xx = xx - ww; }
	277	if (hh < 0) { hh = -hh; yy = yy - hh; }
	278
	279	if (m_brush.GetStyle() != wxTRANSPARENT) {};
	280
	281	if (m_pen.GetStyle() != wxTRANSPARENT) {};
	282	};
	283
	284	bool wxWindowDC::CanDrawBitmap(void) const
	285	{
	286	return TRUE;
	287	};
	288
	289	void wxWindowDC::DrawIcon( const wxIcon &icon, long x, long y, bool useMask )
	290	{
	291	if (!Ok()) return;
	292
	293	if (!icon.Ok()) return;
	294
	295	int xx = XLOG2DEV(x);
	296	int yy = YLOG2DEV(y);
	297
	298	};
	299
	300	bool wxWindowDC::Blit( long xdest, long ydest, long width, long height,
	301	wxDC *source, long xsrc, long ysrc, int WXUNUSED(logical_func), bool WXUNUSED(useMask) )
	302	{
	303	if (!Ok()) return FALSE;
	304
	305	// CMB 20/5/98: add blitting of bitmaps
	306	if (source->IsKindOf(CLASSINFO(wxMemoryDC)))
	307	{
	308	wxMemoryDC* srcDC = (wxMemoryDC*)source;
	309	/*
	310	GdkBitmap* bmap = srcDC->m_selected.GetBitmap();
	311	if (bmap)
	312	{
	313	gdk_draw_bitmap (
	314	m_window,
	315	m_textGC,
	316	bmap,
	317	source->DeviceToLogicalX(xsrc), source->DeviceToLogicalY(ysrc),
	318	XLOG2DEV(xdest), YLOG2DEV(ydest),
	319	source->DeviceToLogicalXRel(width), source->DeviceToLogicalYRel(height)
	320	);
	321	return TRUE;
	322	}
	323	*/
	324	}
	325
	326	return TRUE;
	327	};
	328
	329	void wxWindowDC::DrawText( const wxString &text, long x, long y, bool
	330	WXUNUSED(use16) )
	331	{
	332	if (!Ok()) return;
	333
	334	};
	335
	336
	337
	338	bool wxWindowDC::CanGetTextExtent(void) const
	339	{
	340	return TRUE;
	341	};
	342
	343	void wxWindowDC::GetTextExtent( const wxString &string, long width, long height,
	344	long WXUNUSED(descent), long WXUNUSED(externalLeading),
	345	wxFont *WXUNUSED(theFont), bool WXUNUSED(use16) )
	346	{
	347	if (!Ok()) return;
	348
	349	};
	350
	351	long wxWindowDC::GetCharWidth(void)
	352	{
	353	if (!Ok()) return 0;
	354	return 0;
	355	};
	356
	357	long wxWindowDC::GetCharHeight(void)
	358	{
	359	if (!Ok()) return 0;
	360	return 0;
	361	};
	362
	363	void wxWindowDC::Clear(void)
	364	{
	365	if (!Ok()) return;
	366
	367	};
	368
	369	void wxWindowDC::SetFont( const wxFont &font )
	370	{
	371	if (!Ok()) return;
	372
	373	m_font = font;
	374	};
	375
	376	void wxWindowDC::SetPen( const wxPen &pen )
	377	{
	378	if (!Ok()) return;
	379
	380	if (m_pen == pen) return;
	381
	382	m_pen = pen;
	383
	384	if (!m_pen.Ok()) return;
	385	};
	386
	387	void wxWindowDC::SetBrush( const wxBrush &brush )
	388	{
	389	if (!Ok()) return;
	390
	391	if (m_brush == brush) return;
	392
	393	m_brush = brush;
	394
	395	if (!m_brush.Ok()) return;
	396
	397	};
	398
	399	void wxWindowDC::SetBackground( const wxBrush &brush )
	400	{
	401	if (!Ok()) return;
	402
	403	if (m_backgroundBrush == brush) return;
	404
	405	m_backgroundBrush = brush;
	406
	407	if (!m_backgroundBrush.Ok()) return;
	408
	409	};
	410
	411	void wxWindowDC::SetLogicalFunction( int function )
	412	{
	413	if (m_logicalFunction == function) return;
	414	};
	415
	416	void wxWindowDC::SetTextForeground( const wxColour &col )
	417	{
	418	if (!Ok()) return;
	419
	420	if (m_textForegroundColour == col) return;
	421
	422	m_textForegroundColour = col;
	423	if (!m_textForegroundColour.Ok()) return;
	424	};
	425
	426	void wxWindowDC::SetTextBackground( const wxColour &col )
	427	{
	428	if (!Ok()) return;
	429
	430	if (m_textBackgroundColour == col) return;
	431
	432	m_textBackgroundColour = col;
	433	if (!m_textBackgroundColour.Ok()) return;
	434	};
	435
	436	void wxWindowDC::SetBackgroundMode( int mode )
	437	{
	438	m_backgroundMode = mode;
	439
	440	if (m_brush.GetStyle() != wxSOLID && m_brush.GetStyle() != wxTRANSPARENT)
	441	{
	442	}
	443	};
	444
	445	void wxWindowDC::SetPalette( const wxPalette& WXUNUSED(palette) )
	446	{
	447	};
	448
	449	void wxWindowDC::SetClippingRegion( long x, long y, long width, long height )
	450	{
	451	wxDC::SetClippingRegion( x, y, width, height );
	452
	453	// TODO
	454
	455	};
	456
	457	void wxWindowDC::SetClippingRegion( const wxRegion& region )
	458	{
	459	wxRect box = region.GetBox();
	460
	461	wxDC::SetClippingRegion( box.x, box.y, box.width, box.height );
	462
	463	// TODO
	464	}
	465
	466	void wxWindowDC::DestroyClippingRegion(void)
	467	{
	468	wxDC::DestroyClippingRegion();
	469
	470	};
	471
	472	// ----------------------------------- spline code ----------------------------------------
	473
	474	void wx_quadratic_spline(double a1, double b1, double a2, double b2,
	475	double a3, double b3, double a4, double b4);
	476	void wx_clear_stack(void);
	477	int wx_spline_pop(double x1, double y1, double x2, double y2, double *x3,
	478	double y3, double x4, double *y4);
	479	void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3,
	480	double x4, double y4);
	481	static bool wx_spline_add_point(double x, double y);
	482	static void wx_spline_draw_point_array(wxDC *dc);
	483
	484	wxList wx_spline_point_list;
	485
	486	#define half(z1, z2) ((z1+z2)/2.0)
	487	#define THRESHOLD 5
	488
	489	/* iterative version */
	490
	491	void wx_quadratic_spline(double a1, double b1, double a2, double b2, double a3, double b3, double a4,
	492	double b4)
	493	{
	494	register double xmid, ymid;
	495	double x1, y1, x2, y2, x3, y3, x4, y4;
	496
	497	wx_clear_stack();
	498	wx_spline_push(a1, b1, a2, b2, a3, b3, a4, b4);
	499
	500	while (wx_spline_pop(&x1, &y1, &x2, &y2, &x3, &y3, &x4, &y4)) {
	501	xmid = (double)half(x2, x3);
	502	ymid = (double)half(y2, y3);
	503	if (fabs(x1 - xmid) < THRESHOLD && fabs(y1 - ymid) < THRESHOLD &&
	504	fabs(xmid - x4) < THRESHOLD && fabs(ymid - y4) < THRESHOLD) {
	505	wx_spline_add_point( x1, y1 );
	506	wx_spline_add_point( xmid, ymid );
	507	} else {
	508	wx_spline_push(xmid, ymid, (double)half(xmid, x3), (double)half(ymid, y3),
	509	(double)half(x3, x4), (double)half(y3, y4), x4, y4);
	510	wx_spline_push(x1, y1, (double)half(x1, x2), (double)half(y1, y2),
	511	(double)half(x2, xmid), (double)half(y2, ymid), xmid, ymid);
	512	}
	513	}
	514	}
	515
	516	/* utilities used by spline drawing routines */
	517
	518	typedef struct wx_spline_stack_struct {
	519	double x1, y1, x2, y2, x3, y3, x4, y4;
	520	} Stack;
	521
	522	#define SPLINE_STACK_DEPTH 20
	523	static Stack wx_spline_stack[SPLINE_STACK_DEPTH];
	524	static Stack *wx_stack_top;
	525	static int wx_stack_count;
	526
	527	void wx_clear_stack(void)
	528	{
	529	wx_stack_top = wx_spline_stack;
	530	wx_stack_count = 0;
	531	}
	532
	533	void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4)
	534	{
	535	wx_stack_top->x1 = x1;
	536	wx_stack_top->y1 = y1;
	537	wx_stack_top->x2 = x2;
	538	wx_stack_top->y2 = y2;
	539	wx_stack_top->x3 = x3;
	540	wx_stack_top->y3 = y3;
	541	wx_stack_top->x4 = x4;
	542	wx_stack_top->y4 = y4;
	543	wx_stack_top++;
	544	wx_stack_count++;
	545	}
	546
	547	int wx_spline_pop(double x1, double y1, double x2, double y2,
	548	double x3, double y3, double x4, double y4)
	549	{
	550	if (wx_stack_count == 0)
	551	return (0);
	552	wx_stack_top--;
	553	wx_stack_count--;
	554	*x1 = wx_stack_top->x1;
	555	*y1 = wx_stack_top->y1;
	556	*x2 = wx_stack_top->x2;
	557	*y2 = wx_stack_top->y2;
	558	*x3 = wx_stack_top->x3;
	559	*y3 = wx_stack_top->y3;
	560	*x4 = wx_stack_top->x4;
	561	*y4 = wx_stack_top->y4;
	562	return (1);
	563	}
	564
	565	static bool wx_spline_add_point(double x, double y)
	566	{
	567	wxPoint *point = new wxPoint ;
	568	point->x = (int) x;
	569	point->y = (int) y;
	570	wx_spline_point_list.Append((wxObject*)point);
	571	return TRUE;
	572	}
	573
	574	static void wx_spline_draw_point_array(wxDC *dc)
	575	{
	576	dc->DrawLines(&wx_spline_point_list, 0, 0 );
	577	wxNode *node = wx_spline_point_list.First();
	578	while (node)
	579	{
	580	wxPoint point = (wxPoint )node->Data();
	581	delete point;
	582	delete node;
	583	node = wx_spline_point_list.First();
	584	}
	585	}
	586
	587	void wxWindowDC::DrawSpline( wxList *points )
	588	{
	589	wxPoint *p;
	590	double cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4;
	591	double x1, y1, x2, y2;
	592
	593	wxNode *node = points->First();
	594	p = (wxPoint *)node->Data();
	595
	596	x1 = p->x;
	597	y1 = p->y;
	598
	599	node = node->Next();
	600	p = (wxPoint *)node->Data();
	601
	602	x2 = p->x;
	603	y2 = p->y;
	604	cx1 = (double)((x1 + x2) / 2);
	605	cy1 = (double)((y1 + y2) / 2);
	606	cx2 = (double)((cx1 + x2) / 2);
	607	cy2 = (double)((cy1 + y2) / 2);
	608
	609	wx_spline_add_point(x1, y1);
	610
	611	while ((node = node->Next()) != NULL)
	612	{
	613	p = (wxPoint *)node->Data();
	614	x1 = x2;
	615	y1 = y2;
	616	x2 = p->x;
	617	y2 = p->y;
	618	cx4 = (double)(x1 + x2) / 2;
	619	cy4 = (double)(y1 + y2) / 2;
	620	cx3 = (double)(x1 + cx4) / 2;
	621	cy3 = (double)(y1 + cy4) / 2;
	622
	623	wx_quadratic_spline(cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4);
	624
	625	cx1 = cx4;
	626	cy1 = cy4;
	627	cx2 = (double)(cx1 + x2) / 2;
	628	cy2 = (double)(cy1 + y2) / 2;
	629	}
	630
	631	wx_spline_add_point( cx1, cy1 );
	632	wx_spline_add_point( x2, y2 );
	633
	634	wx_spline_draw_point_array( this );
	635	};