src/motif/dcclient.cpp

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

/*
  About pens, brushes, and the autoSetting flag:

  Under X, pens and brushes control some of the same X drawing
  parameters.  Therefore, it is impossible to independently maintain
  the current pen and the current brush. Also, some settings depend on
  the current logical function. The m_currentFill, etc. instance
  variables remember state across the brush and pen.

  Since pens are used more than brushes, the autoSetting flag is used to
  indicate that a brush was recently used, and SetPen must be called to
  reinstall the current pen's parameters. If autoSetting includes 0x2, then the
  pens color may need to be set based on XOR.

  There is, unfortunately, some confusion between setting the current pen/brush
  and actually installing the brush/pen parameters. Both functionalies are
  perform by SetPen and SetBrush. C'est la vie.
*/

// ============================================================================
// declarations
// ============================================================================

// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------

// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#include "wx/dcclient.h"
#include "wx/dcmemory.h"
#include "wx/window.h"
#include "wx/app.h"
#include "wx/image.h"
#include "wx/log.h"
#include "wx/math.h"

#ifdef __VMS__
#pragma message disable nosimpint
#endif
#include <Xm/Xm.h>
#ifdef __VMS__
#pragma message enable nosimpint
#endif

#include "wx/motif/private.h"

#ifdef __EMX__
    #include <float.h>          // for M_PI
#endif // __EMX__

#include "bdiag.xbm"
#include "fdiag.xbm"
#include "cdiag.xbm"
#include "horiz.xbm"
#include "verti.xbm"
#include "cross.xbm"

static Pixmap bdiag, cdiag, fdiag, cross, horiz, verti;

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

// Fudge factor (VZ: what??)
#define WX_GC_CF 1

// ----------------------------------------------------------------------------
// macros
// ----------------------------------------------------------------------------

IMPLEMENT_DYNAMIC_CLASS(wxClientDC, wxWindowDC)
IMPLEMENT_DYNAMIC_CLASS(wxPaintDC, wxWindowDC)
IMPLEMENT_DYNAMIC_CLASS(wxWindowDC, wxDC)

#ifndef IS_HATCH
    // IS_HATCH exists for WXWIN_COMPATIBILITY_2_4 only
    // but wxMotif needs it for its internals here
    #define IS_HATCH(s)    ((s)>=wxFIRST_HATCH && (s)<=wxLAST_HATCH)
#endif

// FIXME: left over after removal of wxDC::GetOptimization()
#define GET_OPTIMIZATION false

// ----------------------------------------------------------------------------
// prototypes
// ----------------------------------------------------------------------------

static void XCopyRemote(Display *src_display, Display *dest_display,
                        Drawable src, Drawable dest,
                        GC destgc,
                        int srcx, int srcy,
                        unsigned int w, unsigned int h,
                        int destx, int desty,
                        bool more, XImage **cache);

// ============================================================================
// implementation
// ============================================================================

/*
 * compare two doubles and return the larger rounded
 * to the nearest int
 */
static int roundmax(double a, double b)
{
    return (int)((a > b ? a : b) + 0.5);
}

/*
 * compare two doubles and return the smaller rounded
 * to the nearest int
 */
static int roundmin(double a, double b)
{
    return (int)((a < b ? a : b) - 0.5);
}


// ----------------------------------------------------------------------------
// wxWindowDC
// ----------------------------------------------------------------------------

void wxWindowDC::Init()
{
    m_gc = (WXGC) 0;
    m_gcBacking = (WXGC) 0;
    m_window = NULL;
    m_backgroundPixel = -1;
    m_currentPenWidth = 1;
    m_currentPenJoin = -1;
    m_currentPenDashCount = -1;
    m_currentPenDash = (wxX11Dash*) NULL;
    m_currentStyle = -1;
    m_currentFill = -1;
    m_colour = wxColourDisplay();
    m_display = (WXDisplay*) NULL;
    m_pixmap = (WXPixmap) 0;
    m_autoSetting = 0;
    m_ok = false;
    m_clipRegion = (WXRegion) 0;
}

wxWindowDC::wxWindowDC()
{
    Init();
}

wxWindowDC::wxWindowDC( wxWindow *window )
{
    wxASSERT_MSG( (window != (wxWindow*) NULL), "You must pass a valid wxWindow to wxWindowDC/wxClientDC/wxPaintDC constructor." );

    Init();

    m_window = window;
    m_font = window->GetFont();
    m_ok = true;

    m_display = window->GetXDisplay();
    m_pixmap = window->GetXWindow();
    Display* display = (Display*) m_display;

    XSetWindowColormap (display, (Pixmap) m_pixmap, (Colormap) wxTheApp->GetMainColormap(m_display));

    XGCValues gcvalues;
    gcvalues.foreground = BlackPixel (display, DefaultScreen (display));
    gcvalues.background = WhitePixel (display, DefaultScreen (display));
    gcvalues.graphics_exposures = False;
    gcvalues.subwindow_mode = IncludeInferiors;
    gcvalues.line_width = 1;
    m_gc = (WXGC) XCreateGC (display, RootWindow (display, DefaultScreen (display)),
        GCForeground | GCBackground | GCGraphicsExposures | GCLineWidth | GCSubwindowMode,
        &gcvalues);

    if (m_window->GetBackingPixmap())
    {
        m_gcBacking = (WXGC) XCreateGC (display, RootWindow (display,
            DefaultScreen (display)),
            GCForeground | GCBackground | GCGraphicsExposures | GCLineWidth | GCSubwindowMode,
            &gcvalues);
    }

    m_backgroundPixel = (int) gcvalues.background;

    SetBackground(wxBrush(m_window->GetBackgroundColour(), wxSOLID));
}

wxWindowDC::~wxWindowDC()
{
    if (m_gc)
        XFreeGC ((Display*) m_display, (GC) m_gc);
    m_gc = (WXGC) 0;

    if (m_gcBacking)
        XFreeGC ((Display*) m_display, (GC) m_gcBacking);
    m_gcBacking = (WXGC) 0;

    if (m_clipRegion)
        XDestroyRegion ((Region) m_clipRegion);
    m_clipRegion = (WXRegion) 0;
}

extern bool wxDoFloodFill(wxDC *dc, wxCoord x, wxCoord y,
                          const wxColour & col, int style);

bool wxWindowDC::DoFloodFill(wxCoord x, wxCoord y,
                             const wxColour& col, int style)
{
    return wxDoFloodFill(this, x, y, col, style);
}

bool wxWindowDC::DoGetPixel( wxCoord x1, wxCoord y1, wxColour *col ) const
{
    // Generic (and therefore rather inefficient) method.
    // Could be improved.
    wxMemoryDC memdc;
    wxBitmap bitmap(1, 1);
    memdc.SelectObject(bitmap);
    memdc.Blit(0, 0, 1, 1, (wxDC*) this, x1, y1);
    memdc.SelectObject(wxNullBitmap);
    wxImage image = bitmap.ConvertToImage();
    col->Set(image.GetRed(0, 0), image.GetGreen(0, 0), image.GetBlue(0, 0));
    return true;
}

void wxWindowDC::DoDrawLine( wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2 )
{
    wxCHECK_RET( Ok(), "invalid dc" );

    int x1d, y1d, x2d, y2d;

    x1d = XLOG2DEV(x1);
    y1d = YLOG2DEV(y1);
    x2d = XLOG2DEV(x2);
    y2d = YLOG2DEV(y2);

    if (m_autoSetting)
        SetPen (m_pen);

    XDrawLine ((Display*) m_display, (Pixmap) m_pixmap, (GC) m_gc, x1d, y1d, x2d, y2d);

    if (m_window && m_window->GetBackingPixmap())
        XDrawLine ((Display*) m_display, (Pixmap) m_window->GetBackingPixmap(), (GC) m_gcBacking,
        XLOG2DEV_2(x1), YLOG2DEV_2(y1),
        XLOG2DEV_2(x2), YLOG2DEV_2(y2));

    CalcBoundingBox(x1, y1);
    CalcBoundingBox(x2, y2);
}

void wxWindowDC::DoCrossHair( wxCoord x, wxCoord y )
{
    wxCHECK_RET( Ok(), "invalid dc" );

    if (m_autoSetting)
        SetPen (m_pen);

    int xx = XLOG2DEV (x);
    int yy = YLOG2DEV (y);
    int ww, hh;
    wxDisplaySize (&ww, &hh);
    XDrawLine ((Display*) m_display, (Pixmap) m_pixmap, (GC) m_gc, 0, yy,
        ww, yy);
    XDrawLine ((Display*) m_display, (Pixmap) m_pixmap, (GC) m_gc, xx, 0,
        xx, hh);

    if (m_window && m_window->GetBackingPixmap())
    {
        xx = XLOG2DEV_2 (x);
        yy = YLOG2DEV_2 (y);
        XDrawLine ((Display*) m_display, (Pixmap) m_window->GetBackingPixmap(), (GC) m_gcBacking,
            0, yy,
            ww, yy);
        XDrawLine ((Display*) m_display, (Pixmap) m_window->GetBackingPixmap(), (GC) m_gcBacking,
            xx, 0,
            xx, hh);
    }
}

void wxWindowDC::DoDrawArc( wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2, wxCoord xc, wxCoord yc )
{
    wxCHECK_RET( Ok(), "invalid dc" );

    int xx1 = XLOG2DEV (x1);
    int yy1 = YLOG2DEV (y1);
    int xx2 = XLOG2DEV (x2);
    int yy2 = YLOG2DEV (y2);
    int xxc = XLOG2DEV (xc);
    int yyc = YLOG2DEV (yc);
    int xxc_2 = XLOG2DEV_2 (xc);
    int yyc_2 = YLOG2DEV_2 (yc);

    wxCoord dx = xx1 - xxc;
    wxCoord dy = yy1 - yyc;
    double radius = sqrt ((double)(dx * dx + dy * dy));
    wxCoord r = (wxCoord) 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
    {
        if (xx1 - xxc == 0)
            if (yy1 - yyc < 0)
                radius1 = 90.0;
            else
                radius1 = -90.0;
            else
                radius1 = -atan2 ((double) (yy1 - yyc), (double) (xx1 - xxc)) * 360.0 / (2 * M_PI);

            if (xx2 - xxc == 0)
                if (yy2 - yyc < 0)
                    radius2 = 90.0;
                else
                    radius2 = -90.0;
                else
                    radius2 = -atan2 ((double) (yy2 - yyc), (double) (xx2 - xxc)) * 360.0 / (2 * M_PI);
    }
    radius1 *= 64.0;
    radius2 *= 64.0;
    int alpha1 = (int) radius1;
    int alpha2 = (int) (radius2 - radius1);
    while (alpha2 <= 0)
        alpha2 += 360 * 64;
    while (alpha2 > 360 * 64)
        alpha2 -= 360 * 64;

    if (m_brush.Ok() && m_brush.GetStyle () != wxTRANSPARENT)
    {
        SetBrush (m_brush);
        XFillArc ((Display*) m_display, (Pixmap) m_pixmap, (GC) (GC) m_gc,
            xxc - r, yyc - r, 2 * r, 2 * r, alpha1, alpha2);

        if (m_window && m_window->GetBackingPixmap())
            XFillArc ((Display*) m_display, (Pixmap) m_window->GetBackingPixmap(), (GC) m_gcBacking,
            xxc_2 - r, yyc_2 - r, 2 * r, 2 * r, alpha1, alpha2);

    }

    if (m_pen.Ok() && m_pen.GetStyle () != wxTRANSPARENT)
    {
        if (m_autoSetting)
            SetPen (m_pen);
        XDrawArc ((Display*) m_display, (Pixmap) m_pixmap, (GC) m_gc,
            xxc - r, yyc - r, 2 * r, 2 * r, alpha1, alpha2);

        if (m_window && m_window->GetBackingPixmap())
            XDrawArc ((Display*) m_display, (Pixmap) m_window->GetBackingPixmap(), (GC) m_gcBacking,
            xxc_2 - r, yyc_2 - r, 2 * r, 2 * r, alpha1, alpha2);
    }
    CalcBoundingBox (x1, y1);
    CalcBoundingBox (x2, y2);
}

void wxWindowDC::DoDrawEllipticArc( wxCoord x, wxCoord y, wxCoord width, wxCoord height, double sa, double ea )
{
    wxCHECK_RET( Ok(), "invalid dc" );

    int xd, yd, wd, hd;

    xd = XLOG2DEV(x);
    yd = YLOG2DEV(y);
    wd = XLOG2DEVREL(width);
    hd = YLOG2DEVREL(height);

    if (sa>=360 || sa<=-360) sa=sa-int(sa/360)*360;
    if (ea>=360 || ea<=-360) ea=ea-int(ea/360)*360;
    int start = int(sa*64);
    int end   = int(ea*64);
    if (start<0) start+=360*64;
    if (end  <0) end  +=360*64;
    if (end>start) end-=start;
    else end+=360*64-start;

    if (m_brush.Ok() && m_brush.GetStyle () != wxTRANSPARENT)
    {
        m_autoSetting = true;    // must be reset

        SetBrush (m_brush);
        XFillArc ((Display*) m_display, (Pixmap) m_pixmap, (GC) m_gc, xd, yd, wd, hd, start, end);

        if (m_window && m_window->GetBackingPixmap())
            XFillArc ((Display*) m_display, (Pixmap) m_window->GetBackingPixmap(), (GC) m_gcBacking,
            XLOG2DEV_2 (x), YLOG2DEV_2 (y),wd,hd,start,end);
    }

    if (m_pen.Ok() && m_pen.GetStyle () != wxTRANSPARENT)
    {
        if (m_autoSetting)
            SetPen (m_pen);
        XDrawArc ((Display*) m_display, (Pixmap) m_pixmap, (GC) m_gc, xd, yd, wd, hd, start,end);
        if (m_window && m_window->GetBackingPixmap())
            XDrawArc ((Display*) m_display, (Pixmap) m_window->GetBackingPixmap(), (GC) m_gcBacking,
            XLOG2DEV_2 (x), YLOG2DEV_2 (y),wd,hd,start,end);
    }
    CalcBoundingBox (x, y);
    CalcBoundingBox (x + width, y + height);
}

void wxWindowDC::DoDrawPoint( wxCoord x, wxCoord y )
{
    wxCHECK_RET( Ok(), "invalid dc" );

    if (m_pen.Ok() && m_autoSetting)
        SetPen (m_pen);

    XDrawPoint ((Display*) m_display, (Pixmap) m_pixmap, (GC) m_gc, XLOG2DEV (x), YLOG2DEV (y));
    if (m_window && m_window->GetBackingPixmap())
        XDrawPoint ((Display*) m_display, (Pixmap) m_window->GetBackingPixmap(),(GC) m_gcBacking, XLOG2DEV_2 (x), YLOG2DEV_2 (y));

    CalcBoundingBox (x, y);
}

void wxWindowDC::DoDrawLines( int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset )
{
    wxCHECK_RET( Ok(), "invalid dc" );

    if (m_pen.Ok() && m_pen.GetStyle () != wxTRANSPARENT)
    {
        if (m_autoSetting)
            SetPen (m_pen);

        XPoint *xpoints = new XPoint[n];
        int i;

        for (i = 0; i < n; i++)
        {
            xpoints[i].x = XLOG2DEV (points[i].x + xoffset);
            xpoints[i].y = YLOG2DEV (points[i].y + yoffset);
        }
        XDrawLines ((Display*) m_display, (Pixmap) m_pixmap, (GC) m_gc, xpoints, n, 0);

        if (m_window && m_window->GetBackingPixmap())
        {
            for (i = 0; i < n; i++)
            {
                xpoints[i].x = XLOG2DEV_2 (points[i].x + xoffset);
                xpoints[i].y = YLOG2DEV_2 (points[i].y + yoffset);
            }
            XDrawLines ((Display*) m_display, (Pixmap) m_window->GetBackingPixmap(),(GC) m_gcBacking, xpoints, n, 0);
        }
        delete[]xpoints;
    }
}

void wxWindowDC::DoDrawPolygon( int n, wxPoint points[],
                                wxCoord xoffset, wxCoord yoffset, int fillStyle )
{
    wxCHECK_RET( Ok(), "invalid dc" );

    XPoint *xpoints1 = new XPoint[n + 1];
    XPoint *xpoints2 = new XPoint[n + 1];
    int i;
    for (i = 0; i < n; i++)
    {
        xpoints1[i].x = XLOG2DEV (points[i].x + xoffset);
        xpoints1[i].y = YLOG2DEV (points[i].y + yoffset);
        xpoints2[i].x = XLOG2DEV_2 (points[i].x + xoffset);
        xpoints2[i].y = YLOG2DEV_2 (points[i].y + yoffset);
        CalcBoundingBox (points[i].x + xoffset, points[i].y + yoffset);
    }

    // Close figure for XDrawLines (not needed for XFillPolygon)
    xpoints1[i].x = xpoints1[0].x;
    xpoints1[i].y = xpoints1[0].y;
    xpoints2[i].x = xpoints2[0].x;
    xpoints2[i].y = xpoints2[0].y;

    if (m_brush.Ok() && m_brush.GetStyle () != wxTRANSPARENT)
    {
        SetBrush (m_brush);
        XSetFillRule ((Display*) m_display, (GC) m_gc, fillStyle == wxODDEVEN_RULE ? EvenOddRule : WindingRule);
        XFillPolygon ((Display*) m_display, (Pixmap) m_pixmap, (GC) m_gc, xpoints1, n, Complex, 0);
        XSetFillRule ((Display*) m_display, (GC) m_gc, EvenOddRule);    // default mode
        if (m_window && m_window->GetBackingPixmap())
        {
            XSetFillRule ((Display*) m_display,(GC) m_gcBacking,
                fillStyle == wxODDEVEN_RULE ? EvenOddRule : WindingRule);
            XFillPolygon ((Display*) m_display, (Pixmap) m_window->GetBackingPixmap(),(GC) m_gcBacking, xpoints2, n, Complex, 0);
            XSetFillRule ((Display*) m_display,(GC) m_gcBacking, EvenOddRule);    // default mode
        }
    }

    if (m_pen.Ok() && m_pen.GetStyle () != wxTRANSPARENT)
    {
        if (m_autoSetting)
            SetPen (m_pen);
        XDrawLines ((Display*) m_display, (Pixmap) m_pixmap, (GC) m_gc, xpoints1, n + 1, 0);

        if (m_window && m_window->GetBackingPixmap())
            XDrawLines ((Display*) m_display, (Pixmap) m_window->GetBackingPixmap(),(GC) m_gcBacking, xpoints2, n + 1, 0);
    }

    delete[]xpoints1;
    delete[]xpoints2;
}

void wxWindowDC::DoDrawRectangle( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
{
    wxCHECK_RET( Ok(), "invalid dc" );

    int xd, yd, wfd, hfd, wd, hd;

    xd = XLOG2DEV(x);
    yd = YLOG2DEV(y);
    wfd = XLOG2DEVREL(width);
    wd = wfd - WX_GC_CF;
    hfd = YLOG2DEVREL(height);
    hd = hfd - WX_GC_CF;

    if (wfd == 0 || hfd == 0) return;
    if (wd < 0) { wd = - wd; xd = xd - wd; }
    if (hd < 0) { hd = - hd; yd = yd - hd; }

    if (m_brush.Ok() && m_brush.GetStyle () != wxTRANSPARENT)
    {
        SetBrush (m_brush);
        XFillRectangle ((Display*) m_display, (Pixmap) m_pixmap, (GC) m_gc, xd, yd, wfd, hfd);

        if (m_window && m_window->GetBackingPixmap())
            XFillRectangle ((Display*) m_display, (Pixmap) m_window->GetBackingPixmap(),(GC) m_gcBacking,
            XLOG2DEV_2 (x), YLOG2DEV_2 (y),
            wfd, hfd);
    }

    if (m_pen.Ok() && m_pen.GetStyle () != wxTRANSPARENT)
    {
        if (m_autoSetting)
            SetPen (m_pen);
        XDrawRectangle ((Display*) m_display, (Pixmap) m_pixmap, (GC) m_gc, xd, yd, wd, hd);

        if (m_window && m_window->GetBackingPixmap())
            XDrawRectangle ((Display*) m_display, (Pixmap) m_window->GetBackingPixmap(),(GC) m_gcBacking,
            XLOG2DEV_2 (x), YLOG2DEV_2 (y),
            wd, hd);
    }
    CalcBoundingBox (x, y);
    CalcBoundingBox (x + width, y + height);
}

void wxWindowDC::DoDrawRoundedRectangle( wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius )
{
    wxCHECK_RET( Ok(), "invalid dc" );

    // If radius is negative, it's a proportion of the smaller dimension.

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

    int xd = XLOG2DEV (x);
    int yd = YLOG2DEV (y);
    int rd = XLOG2DEVREL ((long) radius);
    int wd = XLOG2DEVREL (width) - WX_GC_CF;
    int hd = YLOG2DEVREL (height) - WX_GC_CF;

    int rw_d = rd * 2;
    int rh_d = rw_d;

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

    // Draw nothing if transformed w or h is 0
    if (wd == 0 || hd == 0) return;

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

    // CMB: ensure dd is not larger than rectangle otherwise we
    // get an hour glass shape
    if (rw_d > wd) rw_d = wd;
    if (rw_d > hd) rw_d = hd;
    rd = rw_d / 2;

    // For backing pixmap
    int xd2 = XLOG2DEV_2 (x);
    int yd2 = YLOG2DEV_2 (y);
    int rd2 = XLOG2DEVREL ((long) radius);
    int wd2 = XLOG2DEVREL (width) ;
    int hd2 = YLOG2DEVREL (height) ;

    int rw_d2 = rd2 * 2;
    int rh_d2 = rw_d2;

    if (m_brush.Ok() && m_brush.GetStyle () != wxTRANSPARENT)
    {
        SetBrush (m_brush);

        XFillRectangle ((Display*) m_display, (Pixmap) m_pixmap, (GC) m_gc, xd + rd, yd,
            wd - rw_d, hd);
        XFillRectangle ((Display*) m_display, (Pixmap) m_pixmap, (GC) m_gc, xd, yd + rd,
            wd, hd - rh_d);

        // Arcs start from 3 o'clock, positive angles anticlockwise
        // Top-left
        XFillArc ((Display*) m_display, (Pixmap) m_pixmap, (GC) m_gc, xd, yd,
            rw_d, rh_d, 90 * 64, 90 * 64);
        // Top-right
        XFillArc ((Display*) m_display, (Pixmap) m_pixmap, (GC) m_gc, xd + wd - rw_d, yd,
            //        rw_d, rh_d, 0, 90 * 64);
            rw_d, rh_d, 0, 91 * 64);
        // Bottom-right
        XFillArc ((Display*) m_display, (Pixmap) m_pixmap, (GC) m_gc, xd + wd - rw_d,
            yd + hd - rh_d,
            //        rw_d, rh_d, 270 * 64, 90 * 64);
            rw_d, rh_d, 269 * 64, 92 * 64);
        // Bottom-left
        XFillArc ((Display*) m_display, (Pixmap) m_pixmap, (GC) m_gc, xd, yd + hd - rh_d,
            rw_d, rh_d, 180 * 64, 90 * 64);

        if (m_window && m_window->GetBackingPixmap())
        {
            XFillRectangle ((Display*) m_display, (Pixmap) m_window->GetBackingPixmap(),(GC) m_gcBacking,
                xd2 + rd2, yd2, wd2 - rw_d2, hd2);
            XFillRectangle ((Display*) m_display, (Pixmap) m_window->GetBackingPixmap(),(GC) m_gcBacking,
                xd2, yd2 + rd2, wd2, hd2 - rh_d2);

            XFillArc ((Display*) m_display, (Pixmap) m_window->GetBackingPixmap(),(GC) m_gcBacking,
                xd2, yd2, rw_d2, rh_d2, 90 * 64, 90 * 64);
            XFillArc ((Display*) m_display, (Pixmap) m_window->GetBackingPixmap(),(GC) m_gcBacking,
                xd2 + wd2 - rw_d2, yd2,
                //            rw_d2, rh_d2, 0, 90 * 64);
                rw_d2, rh_d2, 0, 91 * 64);
            XFillArc ((Display*) m_display, (Pixmap) m_window->GetBackingPixmap(),(GC) m_gcBacking,
                xd2 + wd2 - rw_d2,
                yd2 + hd2 - rh_d2,
                //            rw_d2, rh_d2, 270 * 64, 90 * 64);
                rw_d2, rh_d2, 269 * 64, 92 * 64);
            XFillArc ((Display*) m_display, (Pixmap) m_window->GetBackingPixmap(),(GC) m_gcBacking,
                xd2, yd2 + hd2 - rh_d2,
                rw_d2, rh_d2, 180 * 64, 90 * 64);
        }
    }

    if (m_pen.Ok() && m_pen.GetStyle () != wxTRANSPARENT)
    {
        SetPen (m_pen);
        XDrawLine ((Display*) m_display, (Pixmap) m_pixmap, (GC) m_gc, xd + rd, yd,
            xd + wd - rd + 1, yd);
        XDrawLine ((Display*) m_display, (Pixmap) m_pixmap, (GC) m_gc, xd + rd, yd + hd,
            xd + wd - rd, yd + hd);

        XDrawLine ((Display*) m_display, (Pixmap) m_pixmap, (GC) m_gc, xd, yd + rd,
            xd, yd + hd - rd);
        XDrawLine ((Display*) m_display, (Pixmap) m_pixmap, (GC) m_gc, xd + wd, yd + rd,
            xd + wd, yd + hd - rd + 1);
        XDrawArc ((Display*) m_display, (Pixmap) m_pixmap, (GC) m_gc, xd, yd,
            rw_d, rh_d, 90 * 64, 90 * 64);
        XDrawArc ((Display*) m_display, (Pixmap) m_pixmap, (GC) m_gc, xd + wd - rw_d, yd,
            //        rw_d, rh_d, 0, 90 * 64);
            rw_d, rh_d, 0, 91 * 64);
        XDrawArc ((Display*) m_display, (Pixmap) m_pixmap, (GC) m_gc, xd + wd - rw_d,
            yd + hd - rh_d,
            rw_d, rh_d, 269 * 64, 92 * 64);
        XDrawArc ((Display*) m_display, (Pixmap) m_pixmap, (GC) m_gc, xd, yd + hd - rh_d,
            rw_d, rh_d, 180 * 64, 90 * 64);

        if (m_window && m_window->GetBackingPixmap())
        {
            XDrawLine ((Display*) m_display, (Pixmap) m_window->GetBackingPixmap(),(GC) m_gcBacking,
                xd2 + rd2, yd2,
                xd2 + wd2 - rd2 + 1, yd2);
            XDrawLine ((Display*) m_display, (Pixmap) m_window->GetBackingPixmap(),(GC) m_gcBacking,
                xd2 + rd2, yd2 + hd2,
                xd2 + wd2 - rd2, yd2 + hd2);

            XDrawLine ((Display*) m_display, (Pixmap) m_window->GetBackingPixmap(),(GC) m_gcBacking,
                xd2, yd2 + rd2,
                xd2, yd2 + hd2 - rd2);
            XDrawLine ((Display*) m_display, (Pixmap) m_window->GetBackingPixmap(),(GC) m_gcBacking,
                xd2 + wd2, yd2 + rd2,
                xd2 + wd2, yd2 + hd2 - rd2 + 1);
            XDrawArc ((Display*) m_display, (Pixmap) m_window->GetBackingPixmap(),(GC) m_gcBacking,
                xd2, yd2,
                rw_d2, rh_d2, 90 * 64, 90 * 64);
            XDrawArc ((Display*) m_display, (Pixmap) m_window->GetBackingPixmap(),(GC) m_gcBacking,
                xd2 + wd2 - rw_d2, yd2,
                //            rw_d2, rh_d2, 0, 90 * 64);
                rw_d2, rh_d2, 0, 91 * 64);
            XDrawArc ((Display*) m_display, (Pixmap) m_window->GetBackingPixmap(),(GC) m_gcBacking,
                xd2 + wd2 - rw_d2,
                yd2 + hd2 - rh_d2,
                rw_d2, rh_d2, 269 * 64, 92 * 64);
            XDrawArc ((Display*) m_display, (Pixmap) m_window->GetBackingPixmap(),(GC) m_gcBacking,
                xd2, yd2 + hd2 - rh_d2,
                rw_d2, rh_d2, 180 * 64, 90 * 64);
        }
    }
    CalcBoundingBox (x, y);
    CalcBoundingBox (x + width, y + height);
}

void wxWindowDC::DoDrawEllipse( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
{
    wxCHECK_RET( Ok(), "invalid dc" );

    // Check for negative width and height
    if (height < 0)
    {
        y = y + height;
        height = - height ;
    }

    if (width < 0)
    {
        x = x + width;
        width = - width ;
    }

    static const int angle = 23040;

    int xd, yd, wd, hd;

    xd = XLOG2DEV(x);
    yd = YLOG2DEV(y);
    wd = XLOG2DEVREL(width) ;
    hd = YLOG2DEVREL(height) ;

    if (m_brush.Ok() && m_brush.GetStyle () != wxTRANSPARENT)
    {
        SetBrush (m_brush);
        XFillArc ((Display*) m_display, (Pixmap) m_pixmap, (GC) m_gc, xd, yd, wd, hd, 0, angle);
        if (m_window && m_window->GetBackingPixmap())
            XFillArc ((Display*) m_display, (Pixmap) m_window->GetBackingPixmap(),(GC) m_gcBacking,
            XLOG2DEV_2 (x), YLOG2DEV_2 (y),
            XLOG2DEVREL (width) - WX_GC_CF,
            YLOG2DEVREL (height) - WX_GC_CF, 0, angle);
    }

    if (m_pen.Ok() && m_pen.GetStyle () != wxTRANSPARENT)
    {
        if (m_autoSetting)
            SetPen (m_pen);
        XDrawArc ((Display*) m_display, (Pixmap) m_pixmap, (GC) m_gc, xd, yd, wd, hd, 0, angle);
        if (m_window && m_window->GetBackingPixmap())
            XDrawArc ((Display*) m_display, (Pixmap) m_window->GetBackingPixmap(),(GC) m_gcBacking,
            XLOG2DEV_2 (x), YLOG2DEV_2 (y),
            XLOG2DEVREL (width) - WX_GC_CF,
            YLOG2DEVREL (height) - WX_GC_CF, 0, angle);
    }
    CalcBoundingBox (x, y);
    CalcBoundingBox (x + width, y + height);

}

bool wxWindowDC::CanDrawBitmap() const
{
    wxCHECK_MSG( Ok(), false, "invalid dc" );

    return true;
}

// TODO: use scaled Blit e.g. as per John Price's implementation
// in Contrib/Utilities
bool wxWindowDC::DoBlit( wxCoord xdest, wxCoord ydest,
                         wxCoord width, wxCoord height,
                         wxDC *source, wxCoord xsrc, wxCoord ysrc,
                         int rop, bool useMask,
                         wxCoord xsrcMask, wxCoord ysrcMask )
{
    wxCHECK_MSG( Ok(), false, "invalid dc" );

    wxWindowDC* sourceDC = wxDynamicCast(source, wxWindowDC);

    wxASSERT_MSG( sourceDC, "Blit source DC must be wxWindowDC or derived class." );

    // Be sure that foreground pixels (1) of the Icon will be painted with
    // foreground colour. [m_textForegroundColour] Background pixels (0)
    // will be painted with backgound colour (m_textBackgroundColour)
    // Using ::SetPen is horribly slow, so avoid doing it
    int oldBackgroundPixel = -1;
    int oldForegroundPixel = -1;

    if (m_textBackgroundColour.Ok())
    {
        oldBackgroundPixel = m_backgroundPixel;
        int pixel = m_textBackgroundColour.AllocColour(m_display);

        XSetBackground ((Display*) m_display, (GC) m_gc, pixel);
        if (m_window && m_window->GetBackingPixmap())
            XSetBackground ((Display*) m_display,(GC) m_gcBacking,
                            pixel);
    }
    if (m_textForegroundColour.Ok())
    {
        oldForegroundPixel = m_currentColour.GetPixel();

        if( m_textForegroundColour.GetPixel() <= -1 )
            CalculatePixel( m_textForegroundColour,
                            m_textForegroundColour, true);

        int pixel = m_textForegroundColour.GetPixel();
        if (pixel > -1)
            SetForegroundPixelWithLogicalFunction(pixel);
    }

    // Do bitmap scaling if necessary

    wxBitmap *scaledBitmap = (wxBitmap*) NULL;
    Pixmap sourcePixmap = (Pixmap) NULL;
    double scaleX, scaleY;
    GetUserScale(& scaleX, & scaleY);
    bool retVal = false;

    /* TODO: use the mask origin when drawing transparently */
    if (xsrcMask == -1 && ysrcMask == -1)
    {
        xsrcMask = xsrc; ysrcMask = ysrc;
    }

    // Sorry, can't scale masks just yet
    if (!useMask && (scaleX != 1.0 || scaleY != 1.0) && sourceDC->IsKindOf(CLASSINFO(wxMemoryDC)))
    {
        wxMemoryDC* memDC = (wxMemoryDC*) sourceDC;
        wxBitmap& bitmap = memDC->GetBitmap();

        wxASSERT_MSG( (bitmap.Ok()), "Bad source bitmap in wxWindowDC::Blit");

        wxImage image = bitmap.ConvertToImage();
        if (!image.Ok())
        {
            sourcePixmap = (Pixmap) bitmap.GetDrawable();
        }
        else
        {
            int scaledW = (int) (bitmap.GetWidth() * scaleX);
            int scaledH = (int) (bitmap.GetHeight() * scaleY);

            image = image.Scale(scaledW, scaledH);
            scaledBitmap = new wxBitmap(image);
            sourcePixmap = (Pixmap) scaledBitmap->GetDrawable();
        }
    }
    else
        sourcePixmap = (Pixmap) sourceDC->m_pixmap;

    if (m_pixmap && sourcePixmap)
    {
        /* MATTHEW: [9] */
        int orig = m_logicalFunction;

        SetLogicalFunction (rop);

        if (m_display != sourceDC->m_display)
        {
            XImage *cache = NULL;

            if (m_window && m_window->GetBackingPixmap())
                XCopyRemote((Display*) sourceDC->m_display, (Display*) m_display,
                (Pixmap) sourcePixmap, (Pixmap) m_window->GetBackingPixmap(),
                (GC) m_gcBacking,
                source->LogicalToDeviceX (xsrc),
                source->LogicalToDeviceY (ysrc),
                source->LogicalToDeviceXRel(width),
                source->LogicalToDeviceYRel(height),
                XLOG2DEV_2 (xdest), YLOG2DEV_2 (ydest),
                True, &cache);

            if ( useMask && source->IsKindOf(CLASSINFO(wxMemoryDC)) )
            {
                wxMemoryDC *memDC = (wxMemoryDC *)source;
                wxBitmap& sel = memDC->GetBitmap();
                if ( sel.Ok() && sel.GetMask() && sel.GetMask()->GetBitmap() )
                {
                    XSetClipMask   ((Display*) m_display, (GC) m_gc, (Pixmap) sel.GetMask()->GetBitmap());
                    XSetClipOrigin ((Display*) m_display, (GC) m_gc, XLOG2DEV (xdest), YLOG2DEV (ydest));
                }
            }

            XCopyRemote((Display*) sourceDC->m_display, (Display*) m_display, (Pixmap) sourcePixmap, (Pixmap) m_pixmap, (GC) m_gc,
                source->LogicalToDeviceX (xsrc),
                source->LogicalToDeviceY (ysrc),
                source->LogicalToDeviceXRel(width),
                source->LogicalToDeviceYRel(height),
                XLOG2DEV (xdest), YLOG2DEV (ydest),
                False, &cache);

            if ( useMask )
            {
                if ( m_clipRegion )
                    XSetRegion ((Display*) m_display, (GC) m_gc,
                                (Region) m_clipRegion);
                else
                    XSetClipMask   ((Display*) m_display, (GC) m_gc, None);

                XSetClipOrigin ((Display*) m_display, (GC) m_gc, 0, 0);
            }

        } else
        {        //XGCValues values;
        //XGetGCValues((Display*)m_display, (GC)m_gc, GCForeground, &values);

            if (m_window && m_window->GetBackingPixmap())
            {
                // +++ MARKUS (mho@comnets.rwth-aachen): error on blitting bitmaps with depth 1
                if (source->IsKindOf(CLASSINFO(wxMemoryDC)) && ((wxMemoryDC*) source)->GetBitmap().GetDepth() == 1)
                {
                    XCopyPlane ((Display*) m_display, (Pixmap) sourcePixmap, (Pixmap) m_window->GetBackingPixmap(),(GC) m_gcBacking,
                        source->LogicalToDeviceX (xsrc),
                        source->LogicalToDeviceY (ysrc),
                        source->LogicalToDeviceXRel(width),
                        source->LogicalToDeviceYRel(height),
                        XLOG2DEV_2 (xdest), YLOG2DEV_2 (ydest), 1);
                }
                else
                {
                    XCopyArea ((Display*) m_display, (Pixmap) sourcePixmap, (Pixmap) m_window->GetBackingPixmap(),(GC) m_gcBacking,
                        source->LogicalToDeviceX (xsrc),
                        source->LogicalToDeviceY (ysrc),
                        source->LogicalToDeviceXRel(width),
                        source->LogicalToDeviceYRel(height),
                        XLOG2DEV_2 (xdest), YLOG2DEV_2 (ydest));
                }
            }
            if ( useMask && source->IsKindOf(CLASSINFO(wxMemoryDC)) )
            {
                wxMemoryDC *memDC = (wxMemoryDC *)source;
                wxBitmap& sel = memDC->GetBitmap();
                if ( sel.Ok() && sel.GetMask() && sel.GetMask()->GetBitmap() )
                {
                    XSetClipMask   ((Display*) m_display, (GC) m_gc, (Pixmap) sel.GetMask()->GetBitmap());
                    XSetClipOrigin ((Display*) m_display, (GC) m_gc, XLOG2DEV (xdest), YLOG2DEV (ydest));
                }
            }

            // Check if we're copying from a mono bitmap
            if (source->IsKindOf(CLASSINFO(wxMemoryDC)) &&
                ((wxMemoryDC*)source)->GetBitmap().Ok() && (((wxMemoryDC*)source)->GetBitmap().GetDepth () == 1))
            {
                XCopyPlane ((Display*) m_display, (Pixmap) sourcePixmap, (Pixmap) m_pixmap, (GC) m_gc,
                    source->LogicalToDeviceX (xsrc),
                    source->LogicalToDeviceY (ysrc),
                    source->LogicalToDeviceXRel(width),
                    source->LogicalToDeviceYRel(height),
                    XLOG2DEV (xdest), YLOG2DEV (ydest), 1);
            }
            else
            {
                XCopyArea ((Display*) m_display, (Pixmap) sourcePixmap, (Pixmap) m_pixmap, (GC) m_gc,
                    source->LogicalToDeviceX (xsrc),
                    source->LogicalToDeviceY (ysrc),
                    source->LogicalToDeviceXRel(width),
                    source->LogicalToDeviceYRel(height),
                    XLOG2DEV (xdest), YLOG2DEV (ydest));

            }
            if ( useMask )
            {
                if ( m_clipRegion )
                    XSetRegion ((Display*) m_display, (GC) m_gc,
                                (Region) m_clipRegion);
                else
                    XSetClipMask   ((Display*) m_display, (GC) m_gc, None);

                XSetClipOrigin ((Display*) m_display, (GC) m_gc, 0, 0);
            }

        } /* Remote/local (Display*) m_display */
        CalcBoundingBox (xdest, ydest);
        CalcBoundingBox (xdest + width, ydest + height);

        SetLogicalFunction(orig);

        retVal = true;
  }
  if (scaledBitmap) delete scaledBitmap;

  if (oldBackgroundPixel > -1)
  {
      XSetBackground ((Display*) m_display, (GC) m_gc, oldBackgroundPixel);
      if (m_window && m_window->GetBackingPixmap())
          XSetBackground ((Display*) m_display,(GC) m_gcBacking,
                          oldBackgroundPixel);
  }
  if (oldForegroundPixel > -1)
  {
      XSetForeground ((Display*) m_display, (GC) m_gc, oldForegroundPixel);
      if (m_window && m_window->GetBackingPixmap())
          XSetForeground ((Display*) m_display,(GC) m_gcBacking,
                          oldForegroundPixel);
  }

  return retVal;
}

void wxWindowDC::DoDrawText( const wxString &text, wxCoord x, wxCoord y )
{
    wxCHECK_RET( Ok(), "invalid dc" );

    // Since X draws from the baseline of the text, must add the text height
    int cx = 0;
    int cy = 0;
    int ascent = 0;
    int slen = text.length();

    // Set FillStyle, otherwise X will use current stipple!
    XGCValues gcV, gcBackingV;

    XGetGCValues ((Display*) m_display, (GC)m_gc, GCFillStyle, &gcV);
    XSetFillStyle ((Display*) m_display, (GC) m_gc, FillSolid);
    if (m_window && m_window->GetBackingPixmap())
    {
        XGetGCValues ((Display*) m_display, (GC)m_gcBacking, GCFillStyle,
                      &gcBackingV );
        XSetFillStyle ((Display*) m_display, (GC) m_gcBacking, FillSolid);
    }

    if (m_font.Ok())
        wxGetTextExtent (m_display, m_font, m_userScaleY * m_logicalScaleY,
                         text, &cx, &cy, &ascent, NULL);

    // First draw a rectangle representing the text background, if a text
    // background is specified
    if (m_textBackgroundColour.Ok () && (m_backgroundMode != wxTRANSPARENT))
    {
        wxColour oldPenColour = m_currentColour;
        m_currentColour = m_textBackgroundColour;
        bool sameColour = (oldPenColour.Ok () && m_textBackgroundColour.Ok () &&
            (oldPenColour.Red () == m_textBackgroundColour.Red ()) &&
            (oldPenColour.Blue () == m_textBackgroundColour.Blue ()) &&
            (oldPenColour.Green () == m_textBackgroundColour.Green ()));

        // This separation of the big && test required for gcc2.7/HP UX 9.02
        // or pixel value can be corrupted!
        sameColour = (sameColour &&
            (oldPenColour.GetPixel() == m_textBackgroundColour.GetPixel()));

        if (!sameColour || !GET_OPTIMIZATION)
        {
            int pixel = m_textBackgroundColour.AllocColour(m_display);
            m_currentColour = m_textBackgroundColour;

            // Set the GC to the required colour
            if (pixel > -1)
            {
                XSetForeground ((Display*) m_display, (GC) m_gc, pixel);
                if (m_window && m_window->GetBackingPixmap())
                    XSetForeground ((Display*) m_display,(GC) m_gcBacking, pixel);
            }
        }
        else
            m_textBackgroundColour = oldPenColour ;

        XFillRectangle ((Display*) m_display, (Pixmap) m_pixmap, (GC) m_gc, XLOG2DEV (x), YLOG2DEV (y), cx, cy);
        if (m_window && m_window->GetBackingPixmap())
            XFillRectangle ((Display*) m_display, (Pixmap) m_window->GetBackingPixmap(),(GC) m_gcBacking,
            XLOG2DEV_2 (x), YLOG2DEV_2 (y), cx, cy);
    }

    // Now set the text foreground and draw the text
    if (m_textForegroundColour.Ok ())
    {
        wxColour oldPenColour = m_currentColour;
        m_currentColour = m_textForegroundColour;
        bool sameColour = (oldPenColour.Ok () && m_currentColour.Ok () &&
            (oldPenColour.Red () == m_currentColour.Red ()) &&
            (oldPenColour.Blue () == m_currentColour.Blue ()) &&
            (oldPenColour.Green () == m_currentColour.Green ()) &&
            (oldPenColour.GetPixel() == m_currentColour.GetPixel()));

        if (!sameColour || !GET_OPTIMIZATION)
        {
            int pixel = CalculatePixel(m_textForegroundColour,
                                       m_currentColour, false);

            // Set the GC to the required colour
            if (pixel > -1)
            {
                XSetForeground ((Display*) m_display, (GC) m_gc, pixel);
                if (m_window && m_window->GetBackingPixmap())
                    XSetForeground ((Display*) m_display,(GC) m_gcBacking, pixel);
            }
        }
        else
            m_textForegroundColour = oldPenColour;
    }

    // We need to add the ascent, not the whole height, since X draws at the
    // point above the descender.
#if 0
    if (use16)
        XDrawString16((Display*) m_display, (Pixmap) m_pixmap, (GC) m_gc, XLOG2DEV (x), YLOG2DEV (y) + ascent,
        (XChar2b *)(char*) (const char*) text, slen);
    else
#endif // 0
#if wxMOTIF_NEW_FONT_HANDLING
        XFontSet fset = (XFontSet) m_font.GetFontSet (m_userScaleY * m_logicalScaleY, m_display);
        XmbDrawString((Display*) m_display, (Pixmap) m_pixmap, fset, (GC) m_gc, XLOG2DEV (x), YLOG2DEV (y) + ascent, text, slen);
#else
        XDrawString((Display*) m_display, (Pixmap) m_pixmap, (GC) m_gc, XLOG2DEV (x), YLOG2DEV (y) + ascent, text, slen);
#endif

    if (m_window && m_window->GetBackingPixmap()) {
#if 0
        if (use16)
            XDrawString16((Display*) m_display, (Pixmap) m_window->GetBackingPixmap(), (GC) m_gcBacking,
            XLOG2DEV_2 (x), YLOG2DEV_2 (y) + ascent,
            (XChar2b *)(char*) (const char*) text, slen);
        else
#endif // 0
#if wxMOTIF_NEW_FONT_HANDLING
            XmbDrawString((Display*) m_display, (Pixmap) m_window->GetBackingPixmap(), fset, (GC) m_gcBacking,
            XLOG2DEV_2 (x), YLOG2DEV_2 (y) + ascent,
                        wxConstCast(text.c_str(), char), slen);
#else
            XDrawString((Display*) m_display, (Pixmap) m_window->GetBackingPixmap(), (GC) m_gcBacking,
            XLOG2DEV_2 (x), YLOG2DEV_2 (y) + ascent,
                        wxConstCast(text.c_str(), char), slen);
#endif
    }

    // restore fill style
    XSetFillStyle ((Display*) m_display, (GC) m_gc, gcV.fill_style);
    if (m_window && m_window->GetBackingPixmap())
        XSetFillStyle ((Display*) m_display, (GC) m_gcBacking,
                       gcBackingV.fill_style);

    wxCoord w, h;
    GetTextExtent (text, &w, &h);
    CalcBoundingBox (x + w, y + h);
    CalcBoundingBox (x, y);
}

void wxWindowDC::DoDrawRotatedText( const wxString &text, wxCoord x, wxCoord y,
                                    double angle )
{
    if (angle == 0.0)
    {
        DrawText(text, x, y);
        return;
    }

    wxCHECK_RET( Ok(), "invalid dc" );

    int oldBackgroundPixel = -1;
    int oldForegroundPixel = -1;
    int foregroundPixel = -1;
    int backgroundPixel = -1;

    if (m_textBackgroundColour.Ok())
    {
        oldBackgroundPixel = m_backgroundPixel;
        backgroundPixel = m_textBackgroundColour.AllocColour(m_display);
    }
    if (m_textForegroundColour.Ok())
    {
        oldForegroundPixel = m_currentColour.GetPixel();

        if( m_textForegroundColour.GetPixel() <= -1 )
            CalculatePixel( m_textForegroundColour,
                            m_textForegroundColour, true);

        foregroundPixel = m_textForegroundColour.GetPixel();
    }

    // Since X draws from the baseline of the text, must add the text height
    int cx = 0;
    int cy = 0;
    int ascent = 0;

    if (m_font.Ok())
        wxGetTextExtent (m_display, m_font, m_userScaleY * m_logicalScaleY,
                         text, &cx, &cy, &ascent, NULL);

    wxBitmap src(cx, cy);
    wxMemoryDC dc;
    dc.SelectObject(src);
    dc.SetFont(GetFont());
    dc.SetBackground(*wxWHITE_BRUSH);
    dc.SetBrush(*wxBLACK_BRUSH);
    dc.Clear();
    dc.DrawText(text, 0, 0);
    dc.SetFont(wxNullFont);

    // Calculate the size of the rotated bounding box.
    double dx = cos(angle / 180.0 * M_PI);
    double dy = sin(angle / 180.0 * M_PI);
    double x4 = cy * dy;
    double y4 = cy * dx;
    double x3 = cx * dx;
    double y3 = -cx * dy;
    double x2 = x3 + x4;
    double y2 = y3 + y4;
    double x1 = x;
    double y1 = y;

    // Create image from the source bitmap after writing the text into it.
    wxImage  image = src.ConvertToImage();

    int minx = roundmin(0, roundmin(x4, roundmin(x2, x3)));
    int miny = roundmin(0, roundmin(y4, roundmin(y2, y3)));
    int maxx = roundmax(0, roundmax(x4, roundmax(x2, x3)));
    int maxy = roundmax(0, roundmax(y4, roundmax(y2, y3)));

    bool lastFore = false, lastBack = false;

    // This rotates counterclockwise around the top left corner.
    for (int rx = minx; rx < maxx; rx++)
    {
        for (int ry = miny; ry < maxy; ry++)
        {
            // transform dest coords to source coords
            int sx = (int) (rx * dx - ry * dy + 0.5);
            int sy = - (int) (-ry * dx - rx * dy + 0.5);
            if (sx >= 0 && sx < cx && sy >= 0 && sy < cy)
            {
                bool textPixel = image.GetRed(sx, sy) == 0;

                if (!textPixel && m_backgroundMode != wxSOLID)
                    continue;

                wxCoord ox = (wxCoord) (x1 + rx),
                        oy = (wxCoord) (y1 + ry);
                // draw black pixels, ignore white ones (i.e. transparent b/g)
                if (textPixel && !lastFore)
                {
                    XSetForeground ((Display*) m_display, (GC) m_gc,
                                    foregroundPixel);
                    lastFore = true;
                    lastBack = false;
                }
                else if (!textPixel && !lastBack)
                {
                    XSetForeground ((Display*) m_display, (GC) m_gc,
                                    backgroundPixel);
                    lastFore = false;
                    lastBack = true;
                }

                XDrawPoint ((Display*) m_display, (Pixmap) m_pixmap,
                            (GC) m_gc, XLOG2DEV (ox), YLOG2DEV (oy));
                if (m_window && m_window->GetBackingPixmap())
                    XDrawPoint ((Display*) m_display,
                                (Pixmap) m_window->GetBackingPixmap(),
                                (GC) m_gcBacking,
                                XLOG2DEV_2 (ox), YLOG2DEV_2 (oy));
            }
        }
    }

    if (oldBackgroundPixel > -1)
    {
        XSetBackground ((Display*) m_display, (GC) m_gc, oldBackgroundPixel);
        if (m_window && m_window->GetBackingPixmap())
            XSetBackground ((Display*) m_display,(GC) m_gcBacking,
                            oldBackgroundPixel);
    }
    if (oldForegroundPixel > -1)
    {
        XSetForeground ((Display*) m_display, (GC) m_gc, oldForegroundPixel);
        if (m_window && m_window->GetBackingPixmap())
            XSetForeground ((Display*) m_display,(GC) m_gcBacking,
                            oldForegroundPixel);
    }

    CalcBoundingBox (minx, miny);
    CalcBoundingBox (maxx, maxy);
}

bool wxWindowDC::CanGetTextExtent() const
{
    return true;
}

void wxWindowDC::DoGetTextExtent( const wxString &string, wxCoord *width, wxCoord *height,
                                wxCoord *descent, wxCoord *externalLeading,
                                wxFont *font ) const
{
    wxCHECK_RET( Ok(), "invalid dc" );

    const wxFont* theFont = font ? font : &m_font;

    if (!theFont->Ok())
    {
        // TODO: this should be an error log function
        wxFAIL_MSG("set a valid font before calling GetTextExtent!");

        if (width) *width = -1;
        if (height) *height = -1;
        return;
    }

    wxGetTextExtent(m_display, *theFont, m_userScaleY * m_logicalScaleY,
                    string, width, height, NULL, descent);

    if (width) *width = XDEV2LOGREL (*width);
    if (height) *height = YDEV2LOGREL (*height);
    if (externalLeading)
        *externalLeading = 0;
}

wxCoord wxWindowDC::GetCharWidth() const
{
    wxCHECK_MSG( Ok(), 0, "invalid dc" );
    wxCHECK_MSG( m_font.Ok(), 0, "invalid font" );

    int width;

    wxGetTextExtent (m_display, m_font, m_userScaleY * m_logicalScaleY,
                     "x", &width, NULL, NULL, NULL);

    return XDEV2LOGREL(width);
}

wxCoord wxWindowDC::GetCharHeight() const
{
    wxCHECK_MSG( Ok(), 0, "invalid dc" );
    wxCHECK_MSG( m_font.Ok(), 0, "invalid font" );

    int height;

    wxGetTextExtent (m_display, m_font, m_userScaleY * m_logicalScaleY,
                     "x", NULL, &height, NULL, NULL);

    return XDEV2LOGREL(height);
}

void wxWindowDC::DoGetSize( int *width, int *height ) const
{
    int w = 0, h = 0;

    if( m_window )
    {
        if( m_window->GetBackingPixmap() )
        {
            w = m_window->GetPixmapWidth();
            h = m_window->GetPixmapHeight();
        }
        else
            m_window->GetSize( &w, &h );
    }

    if( width ) *width = w;
    if( height ) *height = h;
}

void wxWindowDC::Clear()
{
    wxCHECK_RET( Ok(), "invalid dc" );

    wxRect rect( GetSize() );
    Clear( rect );
}

void wxWindowDC::Clear(const wxRect& rect)
{
    wxCHECK_RET( Ok(), "invalid dc" );

    int x = rect.x; int y = rect.y;
    int w = rect.width; int h = rect.height;

    wxBrush saveBrush = m_brush;
    SetBrush (m_backgroundBrush);

    XFillRectangle ((Display*) m_display, (Pixmap) m_pixmap, (GC) m_gc,
                    x, y, w, h);

    if (m_window && m_window->GetBackingPixmap())
        XFillRectangle ((Display*) m_display,
                        (Pixmap) m_window->GetBackingPixmap(),(GC) m_gcBacking,
                        x, y, w, h);

    m_brush = saveBrush;
}

void wxWindowDC::SetFont( const wxFont &font )
{
    wxCHECK_RET( Ok(), "invalid dc" );

    m_font = font;

    if (!m_font.Ok())
    {
        return;
    }

#if !wxMOTIF_NEW_FONT_HANDLING
    WXFontStructPtr pFontStruct = m_font.GetFontStruct(m_userScaleY*m_logicalScaleY, m_display);

    Font fontId = ((XFontStruct*)pFontStruct)->fid;
    XSetFont ((Display*) m_display, (GC) m_gc, fontId);

    if (m_window && m_window->GetBackingPixmap())
        XSetFont ((Display*) m_display,(GC) m_gcBacking, fontId);
#endif
}

void wxWindowDC::SetForegroundPixelWithLogicalFunction(int pixel)
{
    if (m_logicalFunction == wxXOR)
    {
        XGCValues values;
        XGetGCValues ((Display*) m_display, (GC) m_gc, GCBackground, &values);
        XSetForeground ((Display*) m_display, (GC) m_gc,
                        pixel ^ values.background);
        if (m_window && m_window->GetBackingPixmap())
            XSetForeground ((Display*) m_display,(GC) m_gcBacking,
                            pixel ^ values.background);
    }
    else
    {
        XSetForeground ((Display*) m_display, (GC) m_gc, pixel);
        if (m_window && m_window->GetBackingPixmap())
            XSetForeground ((Display*) m_display,(GC) m_gcBacking, pixel);
    }
}

int wxWindowDC::CalculatePixel(wxColour& colour, wxColour& curCol,
                               bool roundToWhite) const
{
    const unsigned char wp = (unsigned char)255;

    int pixel = -1;
    if(!m_colour) // Mono display
    {
        unsigned char red = colour.Red ();
        unsigned char blue = colour.Blue ();
        unsigned char green = colour.Green ();
        // white
        if((red == wp && blue == wp && green == wp) ||
           // not black and roundToWhite was specified
           ((red != 0 || blue != 0 || green != 0) && roundToWhite))
        {
            curCol = *wxWHITE;
            pixel = (int)WhitePixel((Display*) m_display,
                                    DefaultScreen((Display*) m_display));
            curCol.SetPixel(pixel);
            colour.SetPixel(pixel);
        }
        else
        {
            curCol = *wxBLACK;
            pixel = (int)BlackPixel((Display*) m_display,
                                    DefaultScreen((Display*) m_display));
            curCol.SetPixel(pixel);
            colour.SetPixel(pixel);
        }
    }
    else
    {
        curCol = colour;
        pixel = colour.AllocColour((Display*) m_display);
        curCol.SetPixel(pixel);
    }

    return pixel;
}

void wxWindowDC::SetPen( const wxPen &pen )
{
    wxCHECK_RET( Ok(), "invalid dc" );

    m_pen = pen;
    if (!m_pen.Ok())
        return;

    wxBitmap oldStipple = m_currentStipple;
    int oldStyle = m_currentStyle;
    int oldFill = m_currentFill;
    int old_pen_width = m_currentPenWidth;
    int old_pen_join = m_currentPenJoin;
    int old_pen_cap = m_currentPenCap;
    int old_pen_nb_dash = m_currentPenDashCount;
    wxX11Dash *old_pen_dash = m_currentPenDash;

    wxColour oldPenColour = m_currentColour;
    m_currentColour = m_pen.GetColour ();
    m_currentStyle = m_pen.GetStyle ();
    m_currentFill = m_pen.GetStyle (); // TODO?
    m_currentPenWidth = m_pen.GetWidth ();
    m_currentPenJoin = m_pen.GetJoin ();
    m_currentPenCap = m_pen.GetCap ();
    m_currentPenDashCount = m_pen.GetDashCount();
    m_currentPenDash = (wxX11Dash*)m_pen.GetDash();

    if (m_currentStyle == wxSTIPPLE)
        m_currentStipple = * m_pen.GetStipple ();

    bool sameStyle = (oldStyle == m_currentStyle &&
        oldFill == m_currentFill &&
        old_pen_join == m_currentPenJoin &&
        old_pen_cap == m_currentPenCap &&
        old_pen_nb_dash == m_currentPenDashCount &&
        old_pen_dash == m_currentPenDash &&
        old_pen_width == m_currentPenWidth);

    bool sameColour = (oldPenColour.Ok () &&
        (oldPenColour.Red () == m_currentColour.Red ()) &&
        (oldPenColour.Blue () == m_currentColour.Blue ()) &&
        (oldPenColour.Green () == m_currentColour.Green ()) &&
        (oldPenColour.GetPixel() == m_currentColour.GetPixel()));

    if (!sameStyle || !GET_OPTIMIZATION)
    {
        int scaled_width = (int) XLOG2DEVREL (m_pen.GetWidth ());
        if (scaled_width < 0)
            scaled_width = 0;

        int style;
        int join;
        int cap;
        static const wxX11Dash dotted[] = {2, 5};
        static const wxX11Dash short_dashed[] = {4, 4};
        static const wxX11Dash long_dashed[] = {4, 8};
        static const wxX11Dash dotted_dashed[] = {6, 6, 2, 6};

        // We express dash pattern in pen width unit, so we are
        // independent of zoom factor and so on...
        int req_nb_dash;
        const wxX11Dash *req_dash;

        switch (m_pen.GetStyle ())
        {
        case wxUSER_DASH:
            req_nb_dash = m_currentPenDashCount;
            req_dash = m_currentPenDash;
            style = LineOnOffDash;
            break;
        case wxDOT:
            req_nb_dash = 2;
            req_dash = dotted;
            style = LineOnOffDash;
            break;
        case wxSHORT_DASH:
            req_nb_dash = 2;
            req_dash = short_dashed;
            style = LineOnOffDash;
            break;
        case wxLONG_DASH:
            req_nb_dash = 2;
            req_dash = long_dashed;
            style = LineOnOffDash;
            break;
        case wxDOT_DASH:
            req_nb_dash = 4;
            req_dash = dotted_dashed;
            style = LineOnOffDash;
            break;
        case wxSTIPPLE:
        case wxSOLID:
        case wxTRANSPARENT:
        default:
            style = LineSolid;
            req_dash = (wxX11Dash*)NULL;
            req_nb_dash = 0;
        }

        if (req_dash && req_nb_dash)
        {
            wxX11Dash *real_req_dash = new wxX11Dash[req_nb_dash];
            if (real_req_dash)
            {
                int factor = scaled_width == 0 ? 1 : scaled_width;
                for (int i = 0; i < req_nb_dash; i++)
                    real_req_dash[i] = req_dash[i] * factor;
                XSetDashes ((Display*) m_display, (GC) m_gc, 0, real_req_dash, req_nb_dash);

                if (m_window && m_window->GetBackingPixmap())
                    XSetDashes ((Display*) m_display,(GC) m_gcBacking, 0, real_req_dash, req_nb_dash);
                delete[]real_req_dash;
            }
            else
            {
                // No Memory. We use non-scaled dash pattern...
                XSetDashes ((Display*) m_display, (GC) m_gc, 0, req_dash, req_nb_dash);

                if (m_window && m_window->GetBackingPixmap())
                    XSetDashes ((Display*) m_display,(GC) m_gcBacking, 0, req_dash, req_nb_dash);
            }
        }

        switch (m_pen.GetCap ())
        {
        case wxCAP_PROJECTING:
            cap = CapProjecting;
            break;
        case wxCAP_BUTT:
            cap = CapButt;
            break;
        case wxCAP_ROUND:
        default:
            cap = (scaled_width <= 1) ? CapNotLast : CapRound;
            break;
        }

        switch (m_pen.GetJoin ())
        {
        case wxJOIN_BEVEL:
            join = JoinBevel;
            break;
        case wxJOIN_MITER:
            join = JoinMiter;
            break;
        case wxJOIN_ROUND:
        default:
            join = JoinRound;
            break;
        }

        XSetLineAttributes ((Display*) m_display, (GC) m_gc, scaled_width, style, cap, join);

        if (m_window && m_window->GetBackingPixmap())
            XSetLineAttributes ((Display*) m_display,(GC) m_gcBacking, scaled_width, style, cap, join);
    }

    if (IS_HATCH(m_currentFill) && ((m_currentFill != oldFill) || !GET_OPTIMIZATION))
    {
        Pixmap myStipple;

        oldStipple = wxNullBitmap;    // For later reset!!

        switch (m_currentFill)
        {
        case wxBDIAGONAL_HATCH:
            if (bdiag == (Pixmap) 0)
                bdiag = XCreateBitmapFromData ((Display*) m_display,
                RootWindow ((Display*) m_display, DefaultScreen ((Display*) m_display)),
                bdiag_bits, bdiag_width, bdiag_height);
            myStipple = bdiag;
            break;
        case wxFDIAGONAL_HATCH:
            if (fdiag == (Pixmap) 0)
                fdiag = XCreateBitmapFromData ((Display*) m_display,
                RootWindow ((Display*) m_display, DefaultScreen ((Display*) m_display)),
                fdiag_bits, fdiag_width, fdiag_height);
            myStipple = fdiag;
            break;
        case wxCROSS_HATCH:
            if (cross == (Pixmap) 0)
                cross = XCreateBitmapFromData ((Display*) m_display,
                RootWindow ((Display*) m_display, DefaultScreen ((Display*) m_display)),
                cross_bits, cross_width, cross_height);
            myStipple = cross;
            break;
        case wxHORIZONTAL_HATCH:
            if (horiz == (Pixmap) 0)
                horiz = XCreateBitmapFromData ((Display*) m_display,
                RootWindow ((Display*) m_display, DefaultScreen ((Display*) m_display)),
                horiz_bits, horiz_width, horiz_height);
            myStipple = horiz;
            break;
        case wxVERTICAL_HATCH:
            if (verti == (Pixmap) 0)
                verti = XCreateBitmapFromData ((Display*) m_display,
                RootWindow ((Display*) m_display, DefaultScreen ((Display*) m_display)),
                verti_bits, verti_width, verti_height);
            myStipple = verti;
            break;
        case wxCROSSDIAG_HATCH:
        default:
            if (cdiag == (Pixmap) 0)
                cdiag = XCreateBitmapFromData ((Display*) m_display,
                RootWindow ((Display*) m_display, DefaultScreen ((Display*) m_display)),
                cdiag_bits, cdiag_width, cdiag_height);
            myStipple = cdiag;
            break;
        }
        XSetStipple ((Display*) m_display, (GC) m_gc, myStipple);

        if (m_window && m_window->GetBackingPixmap())
            XSetStipple ((Display*) m_display,(GC) m_gcBacking, myStipple);
    }
    else if (m_currentStipple.Ok()
        && ((m_currentStipple != oldStipple) || !GET_OPTIMIZATION))
    {
        XSetStipple ((Display*) m_display, (GC) m_gc, (Pixmap) m_currentStipple.GetDrawable());

        if (m_window && m_window->GetBackingPixmap())
            XSetStipple ((Display*) m_display,(GC) m_gcBacking, (Pixmap) m_currentStipple.GetDrawable());
    }

    if ((m_currentFill != oldFill) || !GET_OPTIMIZATION)
    {
        int fill_style;

        if (m_currentFill == wxSTIPPLE)
            fill_style = FillStippled;
        else if (IS_HATCH (m_currentFill))
            fill_style = FillStippled;
        else
            fill_style = FillSolid;
        XSetFillStyle ((Display*) m_display, (GC) m_gc, fill_style);
        if (m_window && m_window->GetBackingPixmap())
            XSetFillStyle ((Display*) m_display,(GC) m_gcBacking, fill_style);
    }

    // must test m_logicalFunction, because it involves background!
    if (!sameColour || !GET_OPTIMIZATION
        || ((m_logicalFunction == wxXOR) || (m_autoSetting & 0x2)))
    {
        int pixel = -1;
        if (m_pen.GetStyle () == wxTRANSPARENT)
            pixel = m_backgroundPixel;
        else
        {
            pixel = CalculatePixel(m_pen.GetColour(), m_currentColour, false);
        }

        // Finally, set the GC to the required colour
        if (pixel > -1)
            SetForegroundPixelWithLogicalFunction(pixel);
    }
    else
        m_pen.GetColour().SetPixel(oldPenColour.GetPixel());

    m_autoSetting = 0;
}

void wxWindowDC::SetBrush( const wxBrush &brush )
{
    wxCHECK_RET( Ok(), "invalid dc" );

    m_brush = brush;

    if (!m_brush.Ok() || m_brush.GetStyle () == wxTRANSPARENT)
        return;

    int oldFill = m_currentFill;
    wxBitmap oldStipple = m_currentStipple;

    m_autoSetting |= 0x1;

    m_currentFill = m_brush.GetStyle ();
    if (m_currentFill == wxSTIPPLE)
        m_currentStipple = * m_brush.GetStipple ();

    wxColour oldBrushColour(m_currentColour);
    m_currentColour = m_brush.GetColour ();

    bool sameColour = (oldBrushColour.Ok () &&
        (oldBrushColour.Red () == m_currentColour.Red ()) &&
        (oldBrushColour.Blue () == m_currentColour.Blue ()) &&
        (oldBrushColour.Green () == m_currentColour.Green ()) &&
        (oldBrushColour.GetPixel() == m_currentColour.GetPixel()));

    int stippleDepth = -1;

    if ((oldFill != m_brush.GetStyle ()) || !GET_OPTIMIZATION)
    {
        switch (brush.GetStyle ())
        {
        case wxTRANSPARENT:
            break;
        case wxSTIPPLE:
            stippleDepth = m_currentStipple.GetDepth();
            // fall through!
        case wxBDIAGONAL_HATCH:
        case wxCROSSDIAG_HATCH:
        case wxFDIAGONAL_HATCH:
        case wxCROSS_HATCH:
        case wxHORIZONTAL_HATCH:
        case wxVERTICAL_HATCH:
            {
                if (stippleDepth == -1) stippleDepth = 1;

                // Chris Breeze 23/07/97: use background mode to
                // determine whether fill style should be solid or
                // transparent
                int style = stippleDepth == 1 ?
                    (m_backgroundMode == wxSOLID ?
                     FillOpaqueStippled : FillStippled) :
                    FillTiled;
                XSetFillStyle ((Display*) m_display, (GC) m_gc, style);
                if (m_window && m_window->GetBackingPixmap())
                    XSetFillStyle ((Display*) m_display,(GC) m_gcBacking, style);
            }
            break;
        case wxSOLID:
        default:
            XSetFillStyle ((Display*) m_display, (GC) m_gc, FillSolid);
            if (m_window && m_window->GetBackingPixmap())
                XSetFillStyle ((Display*) m_display,(GC) m_gcBacking,
                               FillSolid);
        }
    }

    if (IS_HATCH(m_currentFill) && ((m_currentFill != oldFill) || !GET_OPTIMIZATION))
    {
        Pixmap myStipple;

        switch (m_currentFill)
        {
        case wxBDIAGONAL_HATCH:
            if (bdiag == (Pixmap) 0)
                bdiag = XCreateBitmapFromData ((Display*) m_display,
                RootWindow ((Display*) m_display, DefaultScreen ((Display*) m_display)),
                bdiag_bits, bdiag_width, bdiag_height);
            myStipple = bdiag;
            break;
        case wxFDIAGONAL_HATCH:
            if (fdiag == (Pixmap) 0)
                fdiag = XCreateBitmapFromData ((Display*) m_display,
                RootWindow ((Display*) m_display, DefaultScreen ((Display*) m_display)),
                fdiag_bits, fdiag_width, fdiag_height);
            myStipple = fdiag;
            break;
        case wxCROSS_HATCH:
            if (cross == (Pixmap) 0)
                cross = XCreateBitmapFromData ((Display*) m_display,
                RootWindow ((Display*) m_display, DefaultScreen ((Display*) m_display)),
                cross_bits, cross_width, cross_height);
            myStipple = cross;
            break;
        case wxHORIZONTAL_HATCH:
            if (horiz == (Pixmap) 0)
                horiz = XCreateBitmapFromData ((Display*) m_display,
                RootWindow ((Display*) m_display, DefaultScreen ((Display*) m_display)),
                horiz_bits, horiz_width, horiz_height);
            myStipple = horiz;
            break;
        case wxVERTICAL_HATCH:
            if (verti == (Pixmap) 0)
                verti = XCreateBitmapFromData ((Display*) m_display,
                RootWindow ((Display*) m_display, DefaultScreen ((Display*) m_display)),
                verti_bits, verti_width, verti_height);
            myStipple = verti;
            break;
        case wxCROSSDIAG_HATCH:
        default:
            if (cdiag == (Pixmap) 0)
                cdiag = XCreateBitmapFromData ((Display*) m_display,
                RootWindow ((Display*) m_display, DefaultScreen ((Display*) m_display)),
                cdiag_bits, cdiag_width, cdiag_height);
            myStipple = cdiag;
            break;
        }
        XSetStipple ((Display*) m_display, (GC) m_gc, myStipple);

        if (m_window && m_window->GetBackingPixmap())
            XSetStipple ((Display*) m_display,(GC) m_gcBacking, myStipple);
    }
    // X can forget the stipple value when resizing a window (apparently)
    // so always set the stipple.
    else if (m_currentFill != wxSOLID && m_currentFill != wxTRANSPARENT &&
             m_currentStipple.Ok()) // && m_currentStipple != oldStipple)
    {
        if (m_currentStipple.GetDepth() == 1)
        {
            XSetStipple ((Display*) m_display, (GC) m_gc,
                         (Pixmap) m_currentStipple.GetDrawable());
        if (m_window && m_window->GetBackingPixmap())
                XSetStipple ((Display*) m_display,(GC) m_gcBacking,
                             (Pixmap) m_currentStipple.GetDrawable());
        }
        else
        {
            XSetTile ((Display*) m_display, (GC) m_gc,
                      (Pixmap) m_currentStipple.GetDrawable());
            if (m_window && m_window->GetBackingPixmap())
                XSetTile ((Display*) m_display,(GC) m_gcBacking,
                          (Pixmap) m_currentStipple.GetDrawable());
        }
    }

    // must test m_logicalFunction, because it involves background!
    if (!sameColour || !GET_OPTIMIZATION || m_logicalFunction == wxXOR)
    {
        int pixel = CalculatePixel(m_brush.GetColour(), m_currentColour, true);

        if (pixel > -1)
            SetForegroundPixelWithLogicalFunction(pixel);
    }
    else
        m_brush.GetColour().SetPixel(oldBrushColour.GetPixel());
}

void wxWindowDC::SetBackground( const wxBrush &brush )
{
    wxCHECK_RET( Ok(), "invalid dc" );

    m_backgroundBrush = brush;

    if (!m_backgroundBrush.Ok())
        return;

    m_backgroundPixel = m_backgroundBrush.GetColour().AllocColour(m_display);

    // Necessary for ::DrawIcon, which use fg/bg pixel or the GC.
    // And Blit,... (Any fct that use XCopyPlane, in fact.)
    XSetBackground ((Display*) m_display, (GC) m_gc, m_backgroundPixel);
    if (m_window && m_window->GetBackingPixmap())
        XSetBackground ((Display*) m_display,(GC) m_gcBacking,
                        m_backgroundPixel);
}

void wxWindowDC::SetLogicalFunction( int function )
{
    wxCHECK_RET( Ok(), "invalid dc" );

    int x_function;

    /* MATTHEW: [9] */
    if (m_logicalFunction == function)
        return;

    switch (function)
    {
    case wxCLEAR:
        x_function = GXclear;
        break;
    case wxXOR:
        x_function = GXxor;
        break;
    case wxINVERT:
        x_function = GXinvert;
        break;
    case wxOR_REVERSE:
        x_function = GXorReverse;
        break;
    case wxAND_REVERSE:
        x_function = GXandReverse;
        break;
    case wxAND:
        x_function = GXand;
        break;
    case wxOR:
        x_function = GXor;
        break;
    case wxAND_INVERT:
        x_function = GXandInverted;
        break;
    case wxNO_OP:
        x_function = GXnoop;
        break;
    case wxNOR:
        x_function = GXnor;
        break;
    case wxEQUIV:
        x_function = GXequiv;
        break;
    case wxSRC_INVERT:
        x_function = GXcopyInverted;
        break;
    case wxOR_INVERT:
        x_function = GXorInverted;
        break;
    case wxNAND:
        x_function = GXnand;
        break;
    case wxSET:
        x_function = GXset;
        break;
    case wxCOPY:
    default:
        x_function = GXcopy;
        break;
    }

    XSetFunction((Display*) m_display, (GC) m_gc, x_function);
    if (m_window && m_window->GetBackingPixmap())
        XSetFunction((Display*) m_display, (GC) m_gcBacking, x_function);

    if ((m_logicalFunction == wxXOR) != (function == wxXOR))
        /* MATTHEW: [9] Need to redo pen simply */
        m_autoSetting |= 0x2;

    m_logicalFunction = function;

}

void wxWindowDC::SetTextForeground( const wxColour &col )
{
    wxCHECK_RET( Ok(), "invalid dc" );

    m_textForegroundColour = col;
}

void wxWindowDC::SetTextBackground( const wxColour &col )
{
    wxCHECK_RET( Ok(), "invalid dc" );

    m_textBackgroundColour = col;
}

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

void wxWindowDC::SetPalette( const wxPalette& palette )
{
    if (m_window)
    {
        if (palette.Ok())
            /* Use GetXColormap */
            XSetWindowColormap ((Display*) m_display, (Window) m_window->GetXWindow(),
            (Colormap) palette.GetXColormap());
        else
            /* Use wxGetMainColormap */
            XSetWindowColormap ((Display*) m_display, (Window) m_window->GetXWindow(),
            (Colormap) wxTheApp->GetMainColormap(m_display));
    }
}

static void wxCopyRegion( WXRegion src, WXRegion& dst )
{
    if( !dst )
        dst = XCreateRegion();
    XUnionRegion( (Region)src, (Region)src, (Region)dst );
}

// Helper function; userRegion is the region set by calling SetClippingRegion
void wxWindowDC::SetDCClipping( WXRegion userRegion )
{
    bool hasUpdateRegion = m_window && m_window->GetUpdateRegion().Ok();
    // this means that we should start the clip region from scratch,
    // or from the update region, if any
    if( !userRegion )
    {
        if( m_clipRegion )
            XDestroyRegion( (Region)m_clipRegion );
        m_clipRegion = (WXRegion)NULL;

        if( hasUpdateRegion )
            wxCopyRegion( m_window->GetUpdateRegion().GetX11Region(),
                          m_clipRegion );
    }
    // intersect the user region, if any, with the
    // exisiting clip region
    else // if( userRegion )
    {
        if( !m_clipRegion )
            wxCopyRegion( userRegion, m_clipRegion );
        else
            XIntersectRegion( (Region)m_clipRegion,
                              (Region)userRegion, (Region)m_clipRegion );
    }

    if( m_clipRegion )
        XSetRegion( (Display*)m_display, (GC)m_gc, (Region)m_clipRegion );
    else
        XSetClipMask( (Display*)m_display, (GC)m_gc, None );
}

void wxWindowDC::DoSetClippingRegion( wxCoord x, wxCoord y,
                                      wxCoord width, wxCoord height )
{
    wxDC::DoSetClippingRegion( x, y, width, height );

    wxRegion temp(x, y, width, height);

    SetDCClipping(temp.GetX11Region());

    // Needs to work differently for Pixmap: without this,
    // there's a nasty (Display*) m_display bug. 8/12/94
    if (m_window && m_window->GetBackingPixmap())
    {
        XRectangle rects[1];
        rects[0].x = XLOG2DEV_2(x);
        rects[0].y = YLOG2DEV_2(y);
        rects[0].width = XLOG2DEVREL(width);
        rects[0].height = YLOG2DEVREL(height);
        XSetClipRectangles((Display*) m_display, (GC) m_gcBacking,
                           0, 0, rects, 1, Unsorted);
    }
}

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

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

    SetDCClipping(region.GetX11Region());

    // Needs to work differently for Pixmap: without this,
    // there's a nasty (Display*) m_display bug. 8/12/94
    if (m_window && m_window->GetBackingPixmap())
    {
        XRectangle rects[1];
        rects[0].x = XLOG2DEV_2(box.x);
        rects[0].y = YLOG2DEV_2(box.y);
        rects[0].width = XLOG2DEVREL(box.width);
        rects[0].height = YLOG2DEVREL(box.height);
        XSetClipRectangles((Display*) m_display, (GC) m_gcBacking,
                           0, 0, rects, 1, Unsorted);
    }
}


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

    SetDCClipping(NULL);

    if (m_window && m_window->GetBackingPixmap())
        XSetClipMask ((Display*) m_display, (GC) m_gcBacking, None);
}

// Resolution in pixels per logical inch
wxSize wxWindowDC::GetPPI() const
{
    // TODO
    return wxSize(100, 100);
}

int wxWindowDC::GetDepth() const
{
    // TODO
    return 24;
}


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

wxPaintDC::wxPaintDC(wxWindow* win) : wxWindowDC(win)
{
    // Set the clipping region.to the update region
    SetDCClipping((WXRegion)NULL);
}

wxPaintDC::~wxPaintDC()
{
    if (m_window)
        m_window->ClearUpdateRegion();
    SetDCClipping((WXRegion)NULL);
}

// ----------------------------------------------------------------------------
// private functions
// ----------------------------------------------------------------------------

/*
   Used when copying between drawables on different (Display*) m_displays. Not
   very fast, but better than giving up.
*/

static void XCopyRemote(Display *src_display, Display *dest_display,
                        Drawable src, Drawable dest,
                        GC destgc,
                        int srcx, int srcy,
                        unsigned int w, unsigned int h,
                        int destx, int desty,
                        bool more, XImage **cache)
{
    XImage *image, *destimage;
    Colormap destcm, srccm;
    static const int CACHE_SIZE = 256;

    unsigned int i, j;
    unsigned long cachesrc[CACHE_SIZE], cachedest[CACHE_SIZE];
    int k, cache_pos, all_cache;

    if (!cache || !*cache)
        image = XGetImage(src_display, src, srcx, srcy, w, h, AllPlanes, ZPixmap);
    else
        image = *cache;

    destimage = XGetImage(dest_display, dest, destx, desty, w, h, AllPlanes, ZPixmap);

    srccm = (Colormap) wxTheApp->GetMainColormap((WXDisplay*) src_display);
    destcm = (Colormap) wxTheApp->GetMainColormap((WXDisplay*) dest_display);

    cache_pos = 0;
    all_cache = False;

    for (i = 0; i < w; i++)
        for (j = 0; j < h; j++) {
            unsigned long pixel;
            XColor xcol;

            pixel = XGetPixel(image, i, j);
            for (k = cache_pos; k--; )
                if (cachesrc[k] == pixel) {
                    pixel = cachedest[k];
                    goto install;
                }
                if (all_cache)
                    for (k = CACHE_SIZE; k-- > cache_pos; )
                        if (cachesrc[k] == pixel) {
                            pixel = cachedest[k];
                            goto install;
                        }

                        cachesrc[cache_pos] = xcol.pixel = pixel;
                        XQueryColor(src_display, srccm, &xcol);
                        if (!XAllocColor(dest_display, destcm, &xcol))
                            xcol.pixel = 0;
                        cachedest[cache_pos] = pixel = xcol.pixel;

                        if (++cache_pos >= CACHE_SIZE) {
                            cache_pos = 0;
                            all_cache = true;
                        }

install:
                        XPutPixel(destimage, i, j, pixel);
        }

        XPutImage(dest_display, dest, destgc, destimage, 0, 0, destx, desty, w, h);
        XDestroyImage(destimage);

        if (more)
            *cache = image;
        else
            XDestroyImage(image);
}

#if 0

/* Helper function for 16-bit fonts */
static int str16len(const char *s)
{
    int count = 0;

    while (s[0] && s[1]) {
        count++;
        s += 2;
    }

    return count;
}

#endif // 0