dc.cpp

很牛的GUI源码wxWidgets-2.8.0.zip 可在多种平台下运行.

            // the modes need this, otherwise we'll end up having really nice colors...
            RGBColor    white = { 0xFFFF, 0xFFFF,0xFFFF} ;
            RGBColor    black = { 0,0,0} ;
            RGBForeColor( &black ) ;
            RGBBackColor( &white ) ;
        }
        if ( useMask && source->m_macMask )
        {
            if ( mode == srcCopy )
            {
                if ( LockPixels( GetGWorldPixMap( MAC_WXHBITMAP(source->m_macMask) ) ) )
                {
                    CopyMask( GetPortBitMapForCopyBits( sourcePort ) ,
                        GetPortBitMapForCopyBits( MAC_WXHBITMAP(source->m_macMask) ) ,
                        GetPortBitMapForCopyBits( MAC_WXHBITMAP(m_macPort) ) ,
                        &srcrect, &srcrect , &dstrect ) ;
                    UnlockPixels( GetGWorldPixMap( MAC_WXHBITMAP(source->m_macMask) )  ) ;
                }
            }
            else
            {
                RgnHandle clipRgn = NewRgn() ;
                LockPixels( GetGWorldPixMap( MAC_WXHBITMAP(source->m_macMask) ) ) ;
                BitMapToRegion( clipRgn , (BitMap*) *GetGWorldPixMap( MAC_WXHBITMAP(source->m_macMask) ) ) ;
                UnlockPixels( GetGWorldPixMap( MAC_WXHBITMAP(source->m_macMask) ) ) ;
                OffsetRgn( clipRgn , -srcrect.left + dstrect.left, -srcrect.top +  dstrect.top ) ;
                if ( mode == kEmulatedMode )
                {
                    Pattern pat ;
                    ::PenPat(GetQDGlobalsBlack(&pat));
                    if ( logical_func == wxSET )
                    {
                        RGBColor col= { 0xFFFF, 0xFFFF, 0xFFFF } ;
                        ::RGBForeColor( &col  ) ;
                        ::PaintRgn( clipRgn ) ;
                    }
                    else if ( logical_func == wxCLEAR )
                    {
                        RGBColor col= { 0x0000, 0x0000, 0x0000 } ;
                        ::RGBForeColor( &col  ) ;
                        ::PaintRgn( clipRgn ) ;
                    }
                    else if ( logical_func == wxINVERT )
                    {
                        MacInvertRgn( clipRgn ) ;
                    }
                    else
                    {
                        for ( int y = 0 ; y < srcrect.right - srcrect.left ; ++y )
                        {
                            for ( int x = 0 ; x < srcrect.bottom - srcrect.top ; ++x )
                            {
                                Point dstPoint = { dstrect.top + y , dstrect.left + x } ;
                                Point srcPoint = { srcrect.top + y , srcrect.left + x } ;
                                if ( PtInRgn( dstPoint , clipRgn ) )
                                {
                                    RGBColor srcColor ;
                                    RGBColor dstColor ;
                                    SetPort( (GrafPtr) sourcePort ) ;
                                    GetCPixel(  srcPoint.h , srcPoint.v , &srcColor) ;
                                    SetPort( (GrafPtr) m_macPort ) ;
                                    GetCPixel( dstPoint.h , dstPoint.v , &dstColor ) ;
                                    wxMacCalculateColour( logical_func , srcColor ,  dstColor ) ;
                                    SetCPixel( dstPoint.h , dstPoint.v , &dstColor ) ;
                                }
                            }
                        }
                    }
                }
                else
                {
                    if ( invertDestinationFirst )
                    {
                        MacInvertRgn( clipRgn ) ;
                    }
                    CopyBits( GetPortBitMapForCopyBits( sourcePort ) ,
                        GetPortBitMapForCopyBits( MAC_WXHBITMAP(m_macPort) ) ,
                        &srcrect, &dstrect, mode, clipRgn ) ;
                }
                DisposeRgn( clipRgn ) ;
            }
        }
        else
        {
            RgnHandle clipRgn = NewRgn() ;
            SetRectRgn( clipRgn , dstrect.left , dstrect.top , dstrect.right , dstrect.bottom ) ;
            if ( mode == kEmulatedMode )
            {
                Pattern pat ;
                ::PenPat(GetQDGlobalsBlack(&pat));
                if ( logical_func == wxSET )
                {
                    RGBColor col= { 0xFFFF, 0xFFFF, 0xFFFF } ;
                    ::RGBForeColor( &col  ) ;
                    ::PaintRgn( clipRgn ) ;
                }
                else if ( logical_func == wxCLEAR )
                {
                    RGBColor col= { 0x0000, 0x0000, 0x0000 } ;
                    ::RGBForeColor( &col  ) ;
                    ::PaintRgn( clipRgn ) ;
                }
                else if ( logical_func == wxINVERT )
                {
                    MacInvertRgn( clipRgn ) ;
                }
                else
                {
                    for ( int y = 0 ; y < srcrect.right - srcrect.left ; ++y )
                    {
                        for ( int x = 0 ; x < srcrect.bottom - srcrect.top ; ++x )
                        {
                            Point dstPoint = { dstrect.top + y , dstrect.left + x } ;
                            Point srcPoint = { srcrect.top + y , srcrect.left + x } ;
                            {
                                RGBColor srcColor ;
                                RGBColor dstColor ;
                                SetPort( (GrafPtr) sourcePort ) ;
                                GetCPixel(  srcPoint.h , srcPoint.v , &srcColor) ;
                                SetPort( (GrafPtr) m_macPort ) ;
                                GetCPixel( dstPoint.h , dstPoint.v , &dstColor ) ;
                                wxMacCalculateColour( logical_func , srcColor ,  dstColor ) ;
                                SetCPixel( dstPoint.h , dstPoint.v , &dstColor ) ;
                            }
                        }
                    }
                }
            }
            else
            {
                if ( invertDestinationFirst )
                {
                    MacInvertRgn( clipRgn ) ;
                }
                CopyBits( GetPortBitMapForCopyBits( sourcePort ) ,
                    GetPortBitMapForCopyBits( MAC_WXHBITMAP(m_macPort) ) ,
                    &srcrect, &dstrect, mode, NULL ) ;
            }
            DisposeRgn( clipRgn ) ;
        }
        UnlockPixels( bmappixels ) ;
    }
    m_macPenInstalled = false ;
    m_macBrushInstalled = false ;
    m_macFontInstalled = false ;
    return true;
}

#ifndef FixedToInt
// as macro in FixMath.h for 10.3
inline Fixed    IntToFixed( int inInt )
{
    return (((SInt32) inInt) << 16);
}

inline int    FixedToInt( Fixed inFixed )
{
    return (((SInt32) inFixed) >> 16);
}
#endif

void  wxDC::DoDrawRotatedText(const wxString& str, wxCoord x, wxCoord y,
                              double angle)
{
    wxCHECK_RET( Ok(), wxT("wxDC::DoDrawRotatedText  Invalid window dc") );

    if (angle == 0.0 )
    {
        DrawText(str, x, y);
        return;
    }

    if ( str.length() == 0 )
        return ;

    wxMacFastPortSetter helper(this) ;
    MacInstallFont() ;

    if ( 0 )
    {
        m_macFormerAliasState = IsAntiAliasedTextEnabled(&m_macFormerAliasSize);
        SetAntiAliasedTextEnabled(true, SInt16(m_scaleY * m_font.GetMacFontSize()));
        m_macAliasWasEnabled = true ;
    }
    OSStatus status = noErr ;
    ATSUTextLayout atsuLayout ;
    UniCharCount chars = str.length() ;
#if wxUSE_UNICODE
    status = ::ATSUCreateTextLayoutWithTextPtr( (UniCharArrayPtr) (const wxChar*) str , 0 , str.length() , str.length() , 1 ,
        &chars , (ATSUStyle*) &m_macATSUIStyle , &atsuLayout ) ;
#else
    wxWCharBuffer wchar = str.wc_str( wxConvLocal ) ;
    int wlen = wxWcslen( wchar.data() ) ;
    status = ::ATSUCreateTextLayoutWithTextPtr( (UniCharArrayPtr) wchar.data() , 0 , wlen , wlen , 1 ,
        &chars , (ATSUStyle*) &m_macATSUIStyle , &atsuLayout ) ;
#endif
    wxASSERT_MSG( status == noErr , wxT("couldn't create the layout of the rotated text") );
    int iAngle = int( angle );
    int drawX = XLOG2DEVMAC(x) ;
    int drawY = YLOG2DEVMAC(y) ;

    ATSUTextMeasurement textBefore ;
    ATSUTextMeasurement textAfter ;
    ATSUTextMeasurement ascent ;
    ATSUTextMeasurement descent ;


    if ( abs(iAngle) > 0 )
    {
        Fixed atsuAngle = IntToFixed( iAngle ) ;
        ATSUAttributeTag atsuTags[] =
        {
            kATSULineRotationTag ,
        } ;
        ByteCount atsuSizes[sizeof(atsuTags)/sizeof(ATSUAttributeTag)] =
        {
            sizeof( Fixed ) ,
        } ;
        ATSUAttributeValuePtr    atsuValues[sizeof(atsuTags)/sizeof(ATSUAttributeTag)] =
        {
            &atsuAngle ,
        } ;
        status = ::ATSUSetLayoutControls(atsuLayout , sizeof(atsuTags)/sizeof(ATSUAttributeTag),
            atsuTags, atsuSizes, atsuValues ) ;
    }
    status = ::ATSUMeasureText( atsuLayout, kATSUFromTextBeginning, kATSUToTextEnd,
        &textBefore , &textAfter, &ascent , &descent );

    drawX += (int)(sin(angle/RAD2DEG) * FixedToInt(ascent));
    drawY += (int)(cos(angle/RAD2DEG) * FixedToInt(ascent));
    status = ::ATSUDrawText( atsuLayout, kATSUFromTextBeginning, kATSUToTextEnd,
        IntToFixed(drawX) , IntToFixed(drawY) );
    wxASSERT_MSG( status == noErr , wxT("couldn't draw the rotated text") );
    Rect rect ;
    status = ::ATSUMeasureTextImage( atsuLayout, kATSUFromTextBeginning, kATSUToTextEnd,
        IntToFixed(drawX) , IntToFixed(drawY) , &rect );
    wxASSERT_MSG( status == noErr , wxT("couldn't measure the rotated text") );
    OffsetRect( &rect , -m_macLocalOrigin.x , -m_macLocalOrigin.y ) ;
    CalcBoundingBox(XDEV2LOG(rect.left), YDEV2LOG(rect.top) );
    CalcBoundingBox(XDEV2LOG(rect.right), YDEV2LOG(rect.bottom) );
    ::ATSUDisposeTextLayout(atsuLayout);
}

void  wxDC::DoDrawText(const wxString& strtext, wxCoord x, wxCoord y)
{
    wxCHECK_RET(Ok(), wxT("wxDC::DoDrawText  Invalid DC"));

    wxMacFastPortSetter helper(this) ;
    long xx = XLOG2DEVMAC(x);
    long yy = YLOG2DEVMAC(y);
#if TARGET_CARBON
    bool useDrawThemeText = ( DrawThemeTextBox != (void*) kUnresolvedCFragSymbolAddress ) ;
    if ( UMAGetSystemVersion() < 0x1000 || IsKindOf(CLASSINFO( wxPrinterDC ) ) || m_font.GetNoAntiAliasing() )
        useDrawThemeText = false ;
#endif
    MacInstallFont() ;
    if ( 0 )
    {
        m_macFormerAliasState = IsAntiAliasedTextEnabled(&m_macFormerAliasSize);
        SetAntiAliasedTextEnabled(true, 8);
        m_macAliasWasEnabled = true ;
    }
    FontInfo fi ;
    ::GetFontInfo( &fi ) ;
#if TARGET_CARBON
    if ( !useDrawThemeText )
#endif
        yy += fi.ascent ;
    ::MoveTo( xx , yy );
    if (  m_backgroundMode == wxTRANSPARENT )
    {
        ::TextMode( srcOr) ;
    }
    else
    {
        ::TextMode( srcCopy ) ;
    }
    int length = strtext.length() ;

    int laststop = 0 ;
    int i = 0 ;
    int line = 0 ;
    {
#if 0 // we don't have to do all that here
        while( i < length )
        {
            if( strtext[i] == 13 || strtext[i] == 10)
            {
                wxString linetext = strtext.Mid( laststop , i - laststop ) ;
#if TARGET_CARBON
                if ( useDrawThemeText )
                {
                    Rect frame = { yy + line*(fi.descent + fi.ascent + fi.leading)  ,xx , yy + (line+1)*(fi.descent + fi.ascent + fi.leading) , xx + 10000 } ;
                    wxMacCFStringHolder mString( linetext , m_font.GetEncoding() ) ;
                    if ( m_backgroundMode != wxTRANSPARENT )
                    {
                        Point bounds={0,0} ;
                        Rect background = frame ;
                        SInt16 baseline ;
                        ::GetThemeTextDimensions( mString,
                            kThemeCurrentPortFont,
                            kThemeStateActive,
                            false,
                            &bounds,
                            &baseline );
                        background.right = background.left + bounds.h ;
                        background.bottom = background.top + bounds.v ;
                        ::EraseRect( &background ) ;
                    }
                    ::DrawThemeTextBox( mString,
                        kThemeCurrentPortFont,
                        kThemeStateActive,
                        false,
                        &frame,
                        teJustLeft,
                        nil );
                    line++ ;
                }
                else
#endif
                {
                    wxCharBuffer text = linetext.mb_str(wxConvLocal) ;
                    ::DrawText( text , 0 , strlen(text) ) ;
                    if ( m_backgroundMode != wxTRANSPARENT )
                    {
                        Point bounds={0,0} ;
                        Rect background = frame ;
                        SInt16 baseline ;
                        ::GetThemeTextDimensions( mString,
                            kThemeCurrentPortFont,
                            kThemeStateActive,
                            false,
                            &bounds,
                            &baseline );
                        background.right = background.left + bounds.h ;
                        background.bottom = background.top + bounds.v ;
                        ::EraseRect( &background ) ;
                    }
                    line++ ;
                    ::MoveTo( xx , yy + line*(fi.descent + fi.ascent + fi.leading) );
                }
                laststop = i+1 ;
            }
            i++ ;
        }
        wxString linetext = strtext.Mid( laststop , i - laststop ) ;
#endif // 0
        wxString linetext = strtext ;
#if TARGET_CARBON
        if ( useDrawThemeText )
        {
            Rect frame = { yy + line*(fi.descent + fi.ascent + fi.leading)  ,xx , yy + (line+1)*(fi.descent + fi.ascent + fi.leading) , xx + 10000 } ;
            wxMacCFStringHolder mString( linetext , m_font.GetEncoding()) ;

            if ( m_backgroundMode != wxTRANSPARENT )
            {
                Point bounds={0,0} ;
                Rect background = frame ;
                SInt16 baseline ;
                ::GetThemeTextDimensions( mString,
                    kThemeCurrentPortFont,
                    kThemeStateActive,
                    false,
                    &bounds,
                    &baseline );
                background.right = background.left + bounds.h ;
                background.bottom = background.top + bounds.v ;
                ::EraseRect( &background ) ;
            }
            ::DrawThemeTextBox( mString,
                kThemeCurrentPortFont,
                kThemeStateActive,
                false,
                &frame,
                teJustLeft,
                nil );
        }
        else
#endif
        {
            wxCharBuffer text = linetext.mb_str(wxConvLocal) ;
            if ( m_backgroundMode != wxTRANSPARENT )
            {
                Rect frame = { yy - fi.ascent + line*(fi.descent + fi.ascent + fi.leading)  ,xx , yy - fi.ascent + (line+1)*(fi.descent + fi.ascent + fi.leading) , xx + 10000 } ;
                short width = ::TextWidth( text , 0 , strlen(text) ) ;
                frame.right = frame.left + width ;

                ::EraseRect( &frame ) ;
            }
            ::DrawText( text , 0 , strlen(text) ) ;
         }
    }
    ::TextMode( srcOr ) ;
}