dc.cpp

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            CalcBoundingBox(cpoints[i].x, cpoints[i].y);
        }
        (void)Polyline(GetHdc(), cpoints, n);
        delete[] cpoints;
    }
    else
    {
        int i;
        for (i = 0; i < n; i++)
            CalcBoundingBox(points[i].x, points[i].y);

        (void)Polyline(GetHdc(), (POINT*) points, n);
    }
}

void wxDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
{
    WXMICROWIN_CHECK_HDC

    wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling

    wxCoord x2 = x + width;
    wxCoord y2 = y + height;

    if ((m_logicalFunction == wxCOPY) && (m_pen.GetStyle() == wxTRANSPARENT))
    {
        RECT rect;
        rect.left = XLOG2DEV(x);
        rect.top = YLOG2DEV(y);
        rect.right = XLOG2DEV(x2);
        rect.bottom = YLOG2DEV(y2);
        (void)FillRect(GetHdc(), &rect, (HBRUSH)m_brush.GetResourceHandle() );
    }
    else
    {
        // Windows draws the filled rectangles without outline (i.e. drawn with a
        // transparent pen) one pixel smaller in both directions and we want them
        // to have the same size regardless of which pen is used - adjust

        // I wonder if this shouldn磘 be done after the LOG2DEV() conversions. RR.
        if ( m_pen.GetStyle() == wxTRANSPARENT )
        {
            // Apparently not needed for WinCE (see e.g. Life! demo)
#ifndef __WXWINCE__
            x2++;
            y2++;
#endif
        }

        (void)Rectangle(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2));
    }


    CalcBoundingBox(x, y);
    CalcBoundingBox(x2, y2);
}

void wxDC::DoDrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius)
{
    WXMICROWIN_CHECK_HDC

    wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling

    // Now, a negative radius value is interpreted to mean
    // 'the proportion of the smallest X or Y dimension'

    if (radius < 0.0)
    {
        double smallest = (width < height) ? width : height;
        radius = (- radius * smallest);
    }

    wxCoord x2 = (x+width);
    wxCoord y2 = (y+height);

    // Windows draws the filled rectangles without outline (i.e. drawn with a
    // transparent pen) one pixel smaller in both directions and we want them
    // to have the same size regardless of which pen is used - adjust
    if ( m_pen.GetStyle() == wxTRANSPARENT )
    {
        x2++;
        y2++;
    }

    (void)RoundRect(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2),
        YLOG2DEV(y2), (int) (2*XLOG2DEV(radius)), (int)( 2*YLOG2DEV(radius)));

    CalcBoundingBox(x, y);
    CalcBoundingBox(x2, y2);
}

void wxDC::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
{
    WXMICROWIN_CHECK_HDC

    wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling

    wxCoord x2 = (x+width);
    wxCoord y2 = (y+height);

    (void)Ellipse(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2));

    CalcBoundingBox(x, y);
    CalcBoundingBox(x2, y2);
}

#if wxUSE_SPLINES
void wxDC::DoDrawSpline(wxList *points)
{
#ifdef  __WXWINCE__
    // WinCE does not support ::PolyBezier so use generic version
    wxDCBase::DoDrawSpline(points);
#else
    // quadratic b-spline to cubic bezier spline conversion
    //
    // quadratic spline with control points P0,P1,P2
    // P(s) = P0*(1-s)^2 + P1*2*(1-s)*s + P2*s^2
    //
    // bezier spline with control points B0,B1,B2,B3
    // B(s) = B0*(1-s)^3 + B1*3*(1-s)^2*s + B2*3*(1-s)*s^2 + B3*s^3
    //
    // control points of bezier spline calculated from b-spline
    // B0 = P0
    // B1 = (2*P1 + P0)/3
    // B2 = (2*P1 + P2)/3
    // B3 = P2

    WXMICROWIN_CHECK_HDC

    wxASSERT_MSG( points, wxT("NULL pointer to spline points?") );

    const size_t n_points = points->GetCount();
    wxASSERT_MSG( n_points > 2 , wxT("incomplete list of spline points?") );

    const size_t n_bezier_points = n_points * 3 + 1;
    POINT *lppt = (POINT *)malloc(n_bezier_points*sizeof(POINT));
    size_t bezier_pos = 0;
    wxCoord x1, y1, x2, y2, cx1, cy1, cx4, cy4;

    wxList::compatibility_iterator node = points->GetFirst();
    wxPoint *p = (wxPoint *)node->GetData();
    lppt[ bezier_pos ].x = x1 = p->x;
    lppt[ bezier_pos ].y = y1 = p->y;
    bezier_pos++;
    lppt[ bezier_pos ] = lppt[ bezier_pos-1 ];
    bezier_pos++;

    node = node->GetNext();
    p = (wxPoint *)node->GetData();

    x2 = p->x;
    y2 = p->y;
    cx1 = ( x1 + x2 ) / 2;
    cy1 = ( y1 + y2 ) / 2;
    lppt[ bezier_pos ].x = XLOG2DEV(cx1);
    lppt[ bezier_pos ].y = YLOG2DEV(cy1);
    bezier_pos++;
    lppt[ bezier_pos ] = lppt[ bezier_pos-1 ];
    bezier_pos++;

#if !wxUSE_STL
    while ((node = node->GetNext()) != NULL)
#else
    while ((node = node->GetNext()))
#endif // !wxUSE_STL
    {
        p = (wxPoint *)node->GetData();
        x1 = x2;
        y1 = y2;
        x2 = p->x;
        y2 = p->y;
        cx4 = (x1 + x2) / 2;
        cy4 = (y1 + y2) / 2;
        // B0 is B3 of previous segment
        // B1:
        lppt[ bezier_pos ].x = XLOG2DEV((x1*2+cx1)/3);
        lppt[ bezier_pos ].y = YLOG2DEV((y1*2+cy1)/3);
        bezier_pos++;
        // B2:
        lppt[ bezier_pos ].x = XLOG2DEV((x1*2+cx4)/3);
        lppt[ bezier_pos ].y = YLOG2DEV((y1*2+cy4)/3);
        bezier_pos++;
        // B3:
        lppt[ bezier_pos ].x = XLOG2DEV(cx4);
        lppt[ bezier_pos ].y = YLOG2DEV(cy4);
        bezier_pos++;
        cx1 = cx4;
        cy1 = cy4;
    }

    lppt[ bezier_pos ] = lppt[ bezier_pos-1 ];
    bezier_pos++;
    lppt[ bezier_pos ].x = XLOG2DEV(x2);
    lppt[ bezier_pos ].y = YLOG2DEV(y2);
    bezier_pos++;
    lppt[ bezier_pos ] = lppt[ bezier_pos-1 ];
    bezier_pos++;

    ::PolyBezier( GetHdc(), lppt, bezier_pos );

    free(lppt);
#endif
}
#endif

// Chris Breeze 20/5/98: first implementation of DrawEllipticArc on Windows
void wxDC::DoDrawEllipticArc(wxCoord x,wxCoord y,wxCoord w,wxCoord h,double sa,double ea)
{
#ifdef __WXWINCE__
    DoDrawEllipticArcRot( x, y, w, h, sa, ea );
#else

    WXMICROWIN_CHECK_HDC

    wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling

    wxCoord x2 = x + w;
    wxCoord y2 = y + h;

    int rx1 = XLOG2DEV(x+w/2);
    int ry1 = YLOG2DEV(y+h/2);
    int rx2 = rx1;
    int ry2 = ry1;

    sa = DegToRad(sa);
    ea = DegToRad(ea);

    rx1 += (int)(100.0 * abs(w) * cos(sa));
    ry1 -= (int)(100.0 * abs(h) * m_signY * sin(sa));
    rx2 += (int)(100.0 * abs(w) * cos(ea));
    ry2 -= (int)(100.0 * abs(h) * m_signY * sin(ea));

    // draw pie with NULL_PEN first and then outline otherwise a line is
    // drawn from the start and end points to the centre
    HPEN hpenOld = (HPEN) ::SelectObject(GetHdc(), (HPEN) ::GetStockObject(NULL_PEN));
    if (m_signY > 0)
    {
        (void)Pie(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2)+1, YLOG2DEV(y2)+1,
                  rx1, ry1, rx2, ry2);
    }
    else
    {
        (void)Pie(GetHdc(), XLOG2DEV(x), YLOG2DEV(y)-1, XLOG2DEV(x2)+1, YLOG2DEV(y2),
                  rx1, ry1-1, rx2, ry2-1);
    }

    ::SelectObject(GetHdc(), hpenOld);

    (void)Arc(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2),
              rx1, ry1, rx2, ry2);

    CalcBoundingBox(x, y);
    CalcBoundingBox(x2, y2);
#endif
}

void wxDC::DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y)
{
    WXMICROWIN_CHECK_HDC

    wxCHECK_RET( icon.Ok(), wxT("invalid icon in DrawIcon") );

#ifdef __WIN32__
    ::DrawIconEx(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), GetHiconOf(icon), icon.GetWidth(), icon.GetHeight(), 0, NULL, DI_NORMAL);
#else
    ::DrawIcon(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), GetHiconOf(icon));
#endif

    CalcBoundingBox(x, y);
    CalcBoundingBox(x + icon.GetWidth(), y + icon.GetHeight());
}

void wxDC::DoDrawBitmap( const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask )
{
    WXMICROWIN_CHECK_HDC

    wxCHECK_RET( bmp.Ok(), _T("invalid bitmap in wxDC::DrawBitmap") );

    int width = bmp.GetWidth(),
        height = bmp.GetHeight();

    HBITMAP hbmpMask = 0;

#if wxUSE_PALETTE
    HPALETTE oldPal = 0;
#endif // wxUSE_PALETTE

    if ( bmp.HasAlpha() )
    {
        MemoryHDC hdcMem;
        SelectInHDC select(hdcMem, GetHbitmapOf(bmp));

        if ( AlphaBlt(GetHdc(), x, y, width, height, 0, 0, hdcMem, bmp) )
            return;
    }

    if ( useMask )
    {
        wxMask *mask = bmp.GetMask();
        if ( mask )
            hbmpMask = (HBITMAP)mask->GetMaskBitmap();

        if ( !hbmpMask )
        {
            // don't give assert here because this would break existing
            // programs - just silently ignore useMask parameter
            useMask = false;
        }
    }
    if ( useMask )
    {
#ifdef __WIN32__
        // use MaskBlt() with ROP which doesn't do anything to dst in the mask
        // points
        // On some systems, MaskBlt succeeds yet is much much slower
        // than the wxWidgets fall-back implementation. So we need
        // to be able to switch this on and off at runtime.
        bool ok = false;
#if wxUSE_SYSTEM_OPTIONS
        if (wxSystemOptions::GetOptionInt(wxT("no-maskblt")) == 0)
#endif
        {
            HDC cdc = GetHdc();
            HDC hdcMem = ::CreateCompatibleDC(GetHdc());
            HGDIOBJ hOldBitmap = ::SelectObject(hdcMem, GetHbitmapOf(bmp));
#if wxUSE_PALETTE
            wxPalette *pal = bmp.GetPalette();
            if ( pal && ::GetDeviceCaps(cdc,BITSPIXEL) <= 8 )
            {
                oldPal = ::SelectPalette(hdcMem, GetHpaletteOf(*pal), FALSE);
                ::RealizePalette(hdcMem);
            }
#endif // wxUSE_PALETTE

            ok = ::MaskBlt(cdc, x, y, width, height,
                            hdcMem, 0, 0,
                            hbmpMask, 0, 0,
                            MAKEROP4(SRCCOPY, DSTCOPY)) != 0;

#if wxUSE_PALETTE
            if (oldPal)
                ::SelectPalette(hdcMem, oldPal, FALSE);
#endif // wxUSE_PALETTE

            ::SelectObject(hdcMem, hOldBitmap);
            ::DeleteDC(hdcMem);
        }

        if ( !ok )
#endif // Win32
        {
            // Rather than reproduce wxDC::Blit, let's do it at the wxWin API
            // level
            wxMemoryDC memDC;
            memDC.SelectObject(bmp);

            Blit(x, y, width, height, &memDC, 0, 0, wxCOPY, useMask);

            memDC.SelectObject(wxNullBitmap);
        }
    }
    else // no mask, just use BitBlt()
    {
        HDC cdc = GetHdc();
        HDC memdc = ::CreateCompatibleDC( cdc );
        HBITMAP hbitmap = (HBITMAP) bmp.GetHBITMAP( );

        wxASSERT_MSG( hbitmap, wxT("bitmap is ok but HBITMAP is NULL?") );

        COLORREF old_textground = ::GetTextColor(GetHdc());
        COLORREF old_background = ::GetBkColor(GetHdc());
        if (m_textForegroundColour.Ok())
        {
            ::SetTextColor(GetHdc(), m_textForegroundColour.GetPixel() );
        }
        if (m_textBackgroundColour.Ok())
        {
            ::SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
        }

#if wxUSE_PALETTE
        wxPalette *pal = bmp.GetPalette();
        if ( pal && ::GetDeviceCaps(cdc,BITSPIXEL) <= 8 )
        {
            oldPal = ::SelectPalette(memdc, GetHpaletteOf(*pal), FALSE);
            ::RealizePalette(memdc);
        }
#endif // wxUSE_PALETTE

        HGDIOBJ hOldBitmap = ::SelectObject( memdc, hbitmap );
        ::BitBlt( cdc, x, y, width, height, memdc, 0, 0, SRCCOPY);

#if wxUSE_PALETTE
        if (oldPal)
            ::SelectPalette(memdc, oldPal, FALSE);
#endif // wxUSE_PALETTE

        ::SelectObject( memdc, hOldBitmap );
        ::DeleteDC( memdc );

        ::SetTextColor(GetHdc(), old_textground);
        ::SetBkColor(GetHdc(), old_background);
    }
}

void wxDC::DoDrawText(const wxString& text, wxCoord x, wxCoord y)
{
    WXMICROWIN_CHECK_HDC

    DrawAnyText(text, x, y);

    // update the bounding box
    CalcBoundingBox(x, y);

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

void wxDC::DrawAnyText(const wxString& text, wxCoord x, wxCoord y)
{
    WXMICROWIN_CHECK_HDC

    // prepare for drawing the text
    if ( m_textForegroundColour.Ok() )
        SetTextColor(GetHdc(), m_textForegroundColour.GetPixel());

    DWORD old_background = 0;
    if ( m_textBackgroundColour.Ok() )
    {
        old_background = SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
    }

    SetBkMode(GetHdc(), m_backgroundMode == wxTRANSPARENT ? TRANSPARENT
                                                          : OPAQUE);

#ifdef __WXWINCE__
    if ( ::ExtTextOut(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), 0, NULL,
                   text.c_str(), text.length(), NULL) == 0 )
    {
        wxLogLastError(wxT("TextOut"));