dc.cpp

Wxpython Implemented on Windows CE, Source code

         // Set foreground and background colours (for bitmaps depth = 1)
         if(bmp.GetDepth() == 1)
        {
             RGBColor fore = MAC_WXCOLORREF(m_textForegroundColour.GetPixel());
             RGBColor back = MAC_WXCOLORREF(m_textBackgroundColour.GetPixel());
             RGBForeColor(&fore);
             RGBBackColor(&back);
         }
         else
         {
             RGBColor white = { 0xFFFF, 0xFFFF,0xFFFF} ;
             RGBColor black = { 0,0,0} ;
             RGBForeColor( &black ) ;
             RGBBackColor( &white ) ;
         }
         bmappixels = GetGWorldPixMap( bmapworld ) ;
         wxCHECK_RET(LockPixels(bmappixels),
                     wxT("DoDrawBitmap:  Unable to lock pixels"));
         Rect source = { 0, 0, h, w };
         Rect dest   = { yy, xx, yy + hh, xx + ww };
         if ( useMask && bmp.GetMask() )
         {
             if( LockPixels(GetGWorldPixMap(MAC_WXHBITMAP(bmp.GetMask()->GetMaskBitmap()))))
             {
                 CopyDeepMask
                     (
                      GetPortBitMapForCopyBits(bmapworld),
                      GetPortBitMapForCopyBits(MAC_WXHBITMAP(bmp.GetMask()->GetMaskBitmap())),
                      GetPortBitMapForCopyBits( MAC_WXHBITMAP(m_macPort) ),
                      &source, &source, &dest, mode, NULL
                      );
                 UnlockPixels(GetGWorldPixMap(MAC_WXHBITMAP(bmp.GetMask()->GetMaskBitmap())));
             }
         }
         else {
             CopyBits( GetPortBitMapForCopyBits( bmapworld ),
                       GetPortBitMapForCopyBits( MAC_WXHBITMAP(m_macPort) ),
                       &source, &dest, mode, NULL ) ;
         }
         UnlockPixels( bmappixels ) ;
     }
     else if ( bmp.GetBitmapType() == kMacBitmapTypeIcon )
     {
        Rect bitmaprect = { 0 , 0 , bmp.GetHeight(), bmp.GetWidth() } ;
        OffsetRect( &bitmaprect, xx, yy ) ;
        PlotCIconHandle( &bitmaprect , atNone , ttNone , MAC_WXHICON(bmp.GetHICON()) ) ;
     }
     m_macPenInstalled = false ;
     m_macBrushInstalled = false ;
     m_macFontInstalled = false ;
}

void wxDC::DoDrawIcon( const wxIcon &icon, wxCoord x, wxCoord y )
{
    wxCHECK_RET(Ok(), wxT("Invalid dc  wxDC::DoDrawIcon"));
    wxCHECK_RET(icon.Ok(), wxT("Invalid icon wxDC::DoDrawIcon"));
    DoDrawBitmap( icon , x , y , icon.GetMask() != NULL ) ;
}

void wxDC::DoSetClippingRegion( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
{
    wxCHECK_RET(Ok(), wxT("wxDC::DoSetClippingRegion  Invalid DC"));
    wxCoord xx, yy, ww, hh;
    xx = XLOG2DEVMAC(x);
    yy = YLOG2DEVMAC(y);
    ww = XLOG2DEVREL(width);
    hh = YLOG2DEVREL(height);
    SetRectRgn( (RgnHandle) m_macCurrentClipRgn , xx , yy , xx + ww , yy + hh ) ;
    SectRgn( (RgnHandle) m_macCurrentClipRgn , (RgnHandle) m_macBoundaryClipRgn , (RgnHandle) m_macCurrentClipRgn ) ;
    if( m_clipping )
    {
        m_clipX1 = wxMax( m_clipX1 , xx );
        m_clipY1 = wxMax( m_clipY1 , yy );
        m_clipX2 = wxMin( m_clipX2, (xx + ww));
        m_clipY2 = wxMin( m_clipY2, (yy + hh));
    }
    else
    {
        m_clipping = true;
        m_clipX1 = xx;
        m_clipY1 = yy;
        m_clipX2 = xx + ww;
        m_clipY2 = yy + hh;
    }
}

void wxDC::DoSetClippingRegionAsRegion( const wxRegion &region  )
{
    wxCHECK_RET( Ok(), wxT("invalid window dc") ) ;
    if (region.Empty())
    {
        DestroyClippingRegion();
        return;
    }
    wxMacFastPortSetter helper(this) ;
    wxCoord x, y, w, h;
    region.GetBox( x, y, w, h );
    wxCoord xx, yy, ww, hh;
    xx = XLOG2DEVMAC(x);
    yy = YLOG2DEVMAC(y);
    ww = XLOG2DEVREL(w);
    hh = YLOG2DEVREL(h);
    // if we have a scaling that we cannot map onto native regions
    // we must use the box
    if ( ww != w || hh != h )
    {
        wxDC::DoSetClippingRegion( x, y, w, h );
    }
    else
    {
        CopyRgn( (RgnHandle) region.GetWXHRGN() , (RgnHandle) m_macCurrentClipRgn ) ;
        if ( xx != x || yy != y )
        {
            OffsetRgn( (RgnHandle) m_macCurrentClipRgn , xx - x , yy - y ) ;
        }
        SectRgn( (RgnHandle) m_macCurrentClipRgn , (RgnHandle) m_macBoundaryClipRgn , (RgnHandle) m_macCurrentClipRgn ) ;
        if( m_clipping )
        {
            m_clipX1 = wxMax( m_clipX1 , xx );
            m_clipY1 = wxMax( m_clipY1 , yy );
            m_clipX2 = wxMin( m_clipX2, (xx + ww));
            m_clipY2 = wxMin( m_clipY2, (yy + hh));
        }
        else
        {
            m_clipping = true;
            m_clipX1 = xx;
            m_clipY1 = yy;
            m_clipX2 = xx + ww;
            m_clipY2 = yy + hh;
        }
    }
}

void wxDC::DestroyClippingRegion()
{
    wxMacFastPortSetter helper(this) ;
    CopyRgn( (RgnHandle) m_macBoundaryClipRgn , (RgnHandle) m_macCurrentClipRgn ) ;
    ResetClipping();
}

void wxDC::DoGetSizeMM( int* width, int* height ) const
{
    int w = 0;
    int h = 0;
    GetSize( &w, &h );
    *width = long( double(w) / (m_scaleX*m_mm_to_pix_x) );
    *height = long( double(h) / (m_scaleY*m_mm_to_pix_y) );
}

void wxDC::SetTextForeground( const wxColour &col )
{
    wxCHECK_RET(Ok(), wxT("Invalid DC"));
    m_textForegroundColour = col;
    m_macFontInstalled = false ;
}

void wxDC::SetTextBackground( const wxColour &col )
{
    wxCHECK_RET(Ok(), wxT("Invalid DC"));
    m_textBackgroundColour = col;
    m_macFontInstalled = false ;
}

void wxDC::SetMapMode( int mode )
{
    switch (mode)
    {
    case wxMM_TWIPS:
        SetLogicalScale( twips2mm*m_mm_to_pix_x, twips2mm*m_mm_to_pix_y );
        break;
    case wxMM_POINTS:
        SetLogicalScale( pt2mm*m_mm_to_pix_x, pt2mm*m_mm_to_pix_y );
        break;
    case wxMM_METRIC:
        SetLogicalScale( m_mm_to_pix_x, m_mm_to_pix_y );
        break;
    case wxMM_LOMETRIC:
        SetLogicalScale( m_mm_to_pix_x/10.0, m_mm_to_pix_y/10.0 );
        break;
    default:
    case wxMM_TEXT:
        SetLogicalScale( 1.0, 1.0 );
        break;
    }
    if (mode != wxMM_TEXT)
    {
        m_needComputeScaleX = true;
        m_needComputeScaleY = true;
    }
}

void wxDC::SetUserScale( double x, double y )
{
    // allow negative ? -> no
    m_userScaleX = x;
    m_userScaleY = y;
    ComputeScaleAndOrigin();
}

void wxDC::SetLogicalScale( double x, double y )
{
    // allow negative ?
    m_logicalScaleX = x;
    m_logicalScaleY = y;
    ComputeScaleAndOrigin();
}

void wxDC::SetLogicalOrigin( wxCoord x, wxCoord y )
{
    m_logicalOriginX = x * m_signX;   // is this still correct ?
    m_logicalOriginY = y * m_signY;
    ComputeScaleAndOrigin();
}

void wxDC::SetDeviceOrigin( wxCoord x, wxCoord y )
{
    m_externalDeviceOriginX = x;
    m_externalDeviceOriginY = y;
    ComputeScaleAndOrigin();
}

#if 0
void wxDC::SetInternalDeviceOrigin( long x, long y )
{
    m_internalDeviceOriginX = x;
    m_internalDeviceOriginY = y;
    ComputeScaleAndOrigin();
}
void wxDC::GetInternalDeviceOrigin( long *x, long *y )
{
    if (x) *x = m_internalDeviceOriginX;
    if (y) *y = m_internalDeviceOriginY;
}
#endif

void wxDC::SetAxisOrientation( bool xLeftRight, bool yBottomUp )
{
    m_signX = (xLeftRight ?  1 : -1);
    m_signY = (yBottomUp  ? -1 :  1);
    ComputeScaleAndOrigin();
}

wxSize wxDC::GetPPI() const
{
    return wxSize(72, 72);
}

int wxDC::GetDepth() const
{
    if ( IsPortColor( (CGrafPtr) m_macPort ) )
    {
        return ( (**GetPortPixMap( (CGrafPtr) m_macPort)).pixelSize ) ;
    }
    return 1 ;
}

void wxDC::ComputeScaleAndOrigin()
{
    // CMB: copy scale to see if it changes
    double origScaleX = m_scaleX;
    double origScaleY = m_scaleY;
    m_scaleX = m_logicalScaleX * m_userScaleX;
    m_scaleY = m_logicalScaleY * m_userScaleY;
    m_deviceOriginX = m_internalDeviceOriginX + m_externalDeviceOriginX;
    m_deviceOriginY = m_internalDeviceOriginY + m_externalDeviceOriginY;
    // CMB: if scale has changed call SetPen to recalulate the line width
    if (m_scaleX != origScaleX || m_scaleY != origScaleY)
    {
        // this is a bit artificial, but we need to force wxDC to think
        // the pen has changed
        wxPen* pen = & GetPen();
        wxPen tempPen;
        m_pen = tempPen;
        SetPen(* pen);
    }
}

void  wxDC::SetPalette( const wxPalette& palette )
{
}

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

void  wxDC::SetFont( const wxFont &font )
{
    m_font = font;
    m_macFontInstalled = false ;
}

void  wxDC::SetPen( const wxPen &pen )
{
    if ( m_pen == pen )
        return ;
    m_pen = pen;
    m_macPenInstalled = false ;
}

void  wxDC::SetBrush( const wxBrush &brush )
{
    if (m_brush == brush)
        return;
    m_brush = brush;
    m_macBrushInstalled = false ;
}

void  wxDC::SetBackground( const wxBrush &brush )
{
    if (m_backgroundBrush == brush)
        return;
    m_backgroundBrush = brush;
    if (!m_backgroundBrush.Ok())
        return;
    m_macBrushInstalled = false ;
}

void  wxDC::SetLogicalFunction( int function )
{
    if (m_logicalFunction == function)
        return;
    m_logicalFunction = function ;
    m_macFontInstalled = false ;
    m_macBrushInstalled = false ;
    m_macPenInstalled = false ;
}

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

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

bool  wxDC::DoGetPixel( wxCoord x, wxCoord y, wxColour *col ) const
{
    wxCHECK_MSG( Ok(), false, wxT("wxDC::DoGetPixel  Invalid DC") );
    wxMacFastPortSetter helper(this) ;
    RGBColor colour;
    GetCPixel( XLOG2DEVMAC(x), YLOG2DEVMAC(y), &colour );
    // Convert from Mac colour to wx
    col->Set( colour.red   >> 8,
        colour.green >> 8,
        colour.blue  >> 8);
    return true ;
}

void  wxDC::DoDrawLine( wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2 )
{
    wxCHECK_RET(Ok(), wxT("Invalid DC"));
    wxMacFastPortSetter helper(this) ;
    if (m_pen.GetStyle() != wxTRANSPARENT)
    {
        MacInstallPen() ;
        wxCoord offset = ( (m_pen.GetWidth() == 0 ? 1 :
        m_pen.GetWidth() ) * (wxCoord)m_scaleX - 1) / 2;
        wxCoord xx1 = XLOG2DEVMAC(x1) - offset;
        wxCoord yy1 = YLOG2DEVMAC(y1) - offset;
        wxCoord xx2 = XLOG2DEVMAC(x2) - offset;
        wxCoord yy2 = YLOG2DEVMAC(y2) - offset;
        if ((m_pen.GetCap() == wxCAP_ROUND) &&
            (m_pen.GetWidth() <= 1))
        {
            // Implement LAST_NOT for MAC at least for
            // orthogonal lines. RR.
            if (xx1 == xx2)
            {
                if (yy1 < yy2)
                    yy2--;
                if (yy1 > yy2)
                    yy2++;
            }
            if (yy1 == yy2)
            {
                if (xx1 < xx2)
                    xx2--;
                if (xx1 > xx2)
                    xx2++;
            }
        }
        ::MoveTo(xx1, yy1);
        ::LineTo(xx2, yy2);
    }