dc.cpp

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        ::MoveTo( xx, YLOG2DEVMAC(0) );
        ::LineTo( xx, YLOG2DEVMAC(h) );
        CalcBoundingBox(x, y);
        CalcBoundingBox(x+w, y+h);
    }
}

/*
* To draw arcs properly the angles need to be converted from the WX style:
* Angles start on the +ve X axis and go anti-clockwise (As you would draw on
* a normal axis on paper).
* TO
* the Mac style:
* Angles start on the +ve y axis and go clockwise.
*/

static double wxConvertWXangleToMACangle(double angle)
{
    double newAngle = 90 - angle ;
    if ( newAngle < 0 )
        newAngle += 360 ;
    return newAngle ;
}

void  wxDC::DoDrawArc( wxCoord x1, wxCoord y1,
                      wxCoord x2, wxCoord y2,
                      wxCoord xc, wxCoord yc )
{
    wxCHECK_RET(Ok(), wxT("wxDC::DoDrawArc  Invalid DC"));
    wxMacFastPortSetter helper(this) ;
    wxCoord xx1 = XLOG2DEVMAC(x1);
    wxCoord yy1 = YLOG2DEVMAC(y1);
    wxCoord xx2 = XLOG2DEVMAC(x2);
    wxCoord yy2 = YLOG2DEVMAC(y2);
    wxCoord xxc = XLOG2DEVMAC(xc);
    wxCoord yyc = YLOG2DEVMAC(yc);
    double dx = xx1 - xxc;
    double dy = yy1 - yyc;
    double radius = sqrt((double)(dx*dx+dy*dy));
    wxCoord rad   = (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
    {
        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;
    }
    wxCoord alpha2 = wxCoord(radius2 - radius1);
    wxCoord alpha1 = wxCoord(wxConvertWXangleToMACangle(radius1));
    if( (xx1 > xx2) || (yy1 > yy2) ) {
        alpha2 *= -1;
    }
    Rect r = { yyc - rad, xxc - rad, yyc + rad, xxc + rad };
    if(m_brush.GetStyle() != wxTRANSPARENT) {
        MacInstallBrush();
        PaintArc(&r, alpha1, alpha2);
    }
    if(m_pen.GetStyle() != wxTRANSPARENT) {
        MacInstallPen();
        FrameArc(&r, alpha1, alpha2);
    }
}

void  wxDC::DoDrawEllipticArc( wxCoord x, wxCoord y, wxCoord w, wxCoord h,
                              double sa, double ea )
{
    wxCHECK_RET(Ok(), wxT("wxDC::DoDrawEllepticArc  Invalid DC"));
    wxMacFastPortSetter helper(this) ;
    Rect r;
    double angle = sa - ea;  // Order important Mac in opposite direction to wx
    // we have to make sure that the filling is always counter-clockwise
    if ( angle > 0 )
        angle -= 360 ;
    wxCoord xx = XLOG2DEVMAC(x);
    wxCoord yy = YLOG2DEVMAC(y);
    wxCoord ww = m_signX * XLOG2DEVREL(w);
    wxCoord hh = m_signY * YLOG2DEVREL(h);
    // handle -ve width and/or height
    if (ww < 0) { ww = -ww; xx = xx - ww; }
    if (hh < 0) { hh = -hh; yy = yy - hh; }
    sa = wxConvertWXangleToMACangle(sa);
    r.top    = yy;
    r.left   = xx;
    r.bottom = yy + hh;
    r.right  = xx + ww;
    if(m_brush.GetStyle() != wxTRANSPARENT) {
        MacInstallBrush();
        PaintArc(&r, (short)sa, (short)angle);
    }
    if(m_pen.GetStyle() != wxTRANSPARENT) {
        MacInstallPen();
        FrameArc(&r, (short)sa, (short)angle);
    }
}

void  wxDC::DoDrawPoint( wxCoord x, wxCoord y )
{
    wxCHECK_RET(Ok(), wxT("Invalid DC"));
    wxMacFastPortSetter helper(this) ;
    if (m_pen.GetStyle() != wxTRANSPARENT)
    {
        wxCoord xx1 = XLOG2DEVMAC(x);
        wxCoord yy1 = YLOG2DEVMAC(y);
        RGBColor pencolor = MAC_WXCOLORREF( m_pen.GetColour().GetPixel());
        ::SetCPixel( xx1,yy1,&pencolor) ;
        CalcBoundingBox(x, y);
    }
}

void  wxDC::DoDrawLines(int n, wxPoint points[],
                        wxCoord xoffset, wxCoord yoffset)
{
    wxCHECK_RET(Ok(), wxT("Invalid DC"));
    wxMacFastPortSetter helper(this) ;
    if (m_pen.GetStyle() == wxTRANSPARENT)
        return;
    MacInstallPen() ;
    wxCoord offset = ( (m_pen.GetWidth() == 0 ? 1 :
    m_pen.GetWidth() ) * (wxCoord)m_scaleX - 1) / 2 ;
    wxCoord x1, x2 , y1 , y2 ;
    x1 = XLOG2DEVMAC(points[0].x + xoffset);
    y1 = YLOG2DEVMAC(points[0].y + yoffset);
    ::MoveTo(x1 - offset, y1 - offset );
    for (int i = 0; i < n-1; i++)
    {
        x2 = XLOG2DEVMAC(points[i+1].x + xoffset);
        y2 = YLOG2DEVMAC(points[i+1].y + yoffset);
        ::LineTo( x2 - offset, y2 - offset );
    }
}

void  wxDC::DoDrawPolygon(int n, wxPoint points[],
                          wxCoord xoffset, wxCoord yoffset,
                          int fillStyle )
{
    wxCHECK_RET(Ok(), wxT("Invalid DC"));
    wxMacFastPortSetter helper(this) ;
    wxCoord x1, x2 , y1 , y2 ;
    if ( m_brush.GetStyle() == wxTRANSPARENT && m_pen.GetStyle() == wxTRANSPARENT )
        return ;
    PolyHandle polygon = OpenPoly();
    x2 = x1 = XLOG2DEVMAC(points[0].x + xoffset);
    y2 = y1 = YLOG2DEVMAC(points[0].y + yoffset);
    ::MoveTo(x1,y1);
    for (int i = 1; i < n; i++)
    {
        x2 = XLOG2DEVMAC(points[i].x + xoffset);
        y2 = YLOG2DEVMAC(points[i].y + yoffset);
        ::LineTo(x2, y2);
    }
    // close the polyline if necessary
    if ( x1 != x2 || y1 != y2 )
    {
        ::LineTo(x1,y1 ) ;
    }
    ClosePoly();
    if (m_brush.GetStyle() != wxTRANSPARENT)
    {
        MacInstallBrush();
        ::PaintPoly( polygon );
    }
    if (m_pen.GetStyle() != wxTRANSPARENT)
    {
        MacInstallPen() ;
        ::FramePoly( polygon ) ;
    }
    KillPoly( polygon );
}

void wxDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
{
    wxCHECK_RET(Ok(), wxT("Invalid DC"));
    wxMacFastPortSetter helper(this) ;
    wxCoord xx = XLOG2DEVMAC(x);
    wxCoord yy = YLOG2DEVMAC(y);
    wxCoord ww = m_signX * XLOG2DEVREL(width);
    wxCoord 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;
    }
    Rect rect = { yy , xx , yy + hh , xx + ww } ;
    if (m_brush.GetStyle() != wxTRANSPARENT)
    {
        MacInstallBrush() ;
        ::PaintRect( &rect ) ;
    }
    if (m_pen.GetStyle() != wxTRANSPARENT)
    {
        MacInstallPen() ;
        ::FrameRect( &rect ) ;
    }
}

void  wxDC::DoDrawRoundedRectangle(wxCoord x, wxCoord y,
                                   wxCoord width, wxCoord height,
                                   double radius)
{
    wxCHECK_RET(Ok(), wxT("Invalid DC"));
    wxMacFastPortSetter helper(this) ;
    if (radius < 0.0)
        radius = - radius * ((width < height) ? width : height);
    wxCoord xx = XLOG2DEVMAC(x);
    wxCoord yy = YLOG2DEVMAC(y);
    wxCoord ww = m_signX * XLOG2DEVREL(width);
    wxCoord 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;
    }
    Rect rect = { yy , xx , yy + hh , xx + ww } ;
    if (m_brush.GetStyle() != wxTRANSPARENT)
    {
        MacInstallBrush() ;
        ::PaintRoundRect( &rect , int(radius * 2) , int(radius * 2) ) ;
    }
    if (m_pen.GetStyle() != wxTRANSPARENT)
    {
        MacInstallPen() ;
        ::FrameRoundRect( &rect , int(radius * 2) , int(radius * 2) ) ;
    }
}

void  wxDC::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
{
    wxCHECK_RET(Ok(), wxT("Invalid DC"));
    wxMacFastPortSetter helper(this) ;
    wxCoord xx = XLOG2DEVMAC(x);
    wxCoord yy = YLOG2DEVMAC(y);
    wxCoord ww = m_signX * XLOG2DEVREL(width);
    wxCoord 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;
    }
    Rect rect = { yy , xx , yy + hh , xx + ww } ;
    if (m_brush.GetStyle() != wxTRANSPARENT)
    {
        MacInstallBrush() ;
        ::PaintOval( &rect ) ;
    }
    if (m_pen.GetStyle() != wxTRANSPARENT)
    {
        MacInstallPen() ;
        ::FrameOval( &rect ) ;
    }
}

bool  wxDC::CanDrawBitmap(void) const
{
    return true ;
}

bool  wxDC::DoBlit(wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height,
                   wxDC *source, wxCoord xsrc, wxCoord ysrc, int logical_func , bool useMask,
                   wxCoord xsrcMask,  wxCoord ysrcMask )
{
    wxCHECK_MSG(Ok(), false, wxT("wxDC::DoBlit Illegal dc"));
    wxCHECK_MSG(source->Ok(), false, wxT("wxDC::DoBlit  Illegal source DC"));
    if ( logical_func == wxNO_OP )
        return true ;
    if (xsrcMask == -1 && ysrcMask == -1)
    {
        xsrcMask = xsrc; ysrcMask = ysrc;
    }
    // correct the parameter in case this dc does not have a mask at all
    if ( useMask && !source->m_macMask )
        useMask = false ;
    Rect srcrect , dstrect ;
    srcrect.top = source->YLOG2DEVMAC(ysrc) ;
    srcrect.left = source->XLOG2DEVMAC(xsrc)  ;
    srcrect.right = source->XLOG2DEVMAC(xsrc + width ) ;
    srcrect.bottom = source->YLOG2DEVMAC(ysrc + height) ;
    dstrect.top = YLOG2DEVMAC(ydest) ;
    dstrect.left = XLOG2DEVMAC(xdest) ;
    dstrect.bottom = YLOG2DEVMAC(ydest + height )  ;
    dstrect.right = XLOG2DEVMAC(xdest + width ) ;
    short mode = kUnsupportedMode ;
    bool invertDestinationFirst = false ;
    switch ( logical_func )
    {
    case wxAND:        // src AND dst
        mode = adMin ; // ok
        break ;
    case wxAND_INVERT: // (NOT src) AND dst
        mode = notSrcOr  ; // ok
        break ;
    case wxAND_REVERSE:// src AND (NOT dst)
        invertDestinationFirst = true ;
        mode = srcOr ;
        break ;
    case wxCLEAR:      // 0
        mode = kEmulatedMode ;
        break ;
    case wxCOPY:       // src
        mode = srcCopy ; // ok
        break ;
    case wxEQUIV:      // (NOT src) XOR dst
        mode = srcXor ; // ok
        break ;
    case wxINVERT:     // NOT dst
        mode = kEmulatedMode ; //or hilite ;
        break ;
    case wxNAND:       // (NOT src) OR (NOT dst)
        invertDestinationFirst = true ;
        mode = srcBic ;
        break ;
    case wxNOR:        // (NOT src) AND (NOT dst)
        invertDestinationFirst = true ;
        mode = notSrcOr ;
        break ;
    case wxNO_OP:      // dst
        mode = kEmulatedMode ; // this has already been handled upon entry
        break ;
    case wxOR:         // src OR dst
        mode = notSrcBic ;
        break ;
    case wxOR_INVERT:  // (NOT src) OR dst
        mode = srcBic ;
        break ;
    case wxOR_REVERSE: // src OR (NOT dst)
        invertDestinationFirst = true ;
        mode = notSrcBic ;
        break ;
    case wxSET:        // 1
        mode = kEmulatedMode ;
        break ;
    case wxSRC_INVERT: // (NOT src)
        mode = notSrcCopy ; // ok
        break ;
    case wxXOR:        // src XOR dst
        mode = notSrcXor ; // ok
        break ;
    default :
        break ;
    }
    if ( mode == kUnsupportedMode )
    {
        wxFAIL_MSG(wxT("unsupported blitting mode" ));
        return false ;
    }
    CGrafPtr            sourcePort = (CGrafPtr) source->m_macPort ;
    PixMapHandle    bmappixels =  GetGWorldPixMap( sourcePort ) ;
    if ( LockPixels(bmappixels) )
    {
        wxMacFastPortSetter helper(this) ;
        if ( source->GetDepth() == 1 )
        {
            RGBForeColor( &MAC_WXCOLORREF(m_textForegroundColour.GetPixel()) ) ;
            RGBBackColor( &MAC_WXCOLORREF(m_textBackgroundColour.GetPixel()) ) ;
        }
        else
        {