C++ wxBitmap::GetMask方法代码示例

void wxQtDCImpl::DoDrawBitmap(const wxBitmap &bmp, wxCoord x, wxCoord y,
                          bool useMask )
{
    QPixmap pix = *bmp.GetHandle();
    if (pix.depth() == 1) {
        //Monochrome bitmap, draw using text fore/background

        //Save pen/brush
        QBrush savedBrush = m_qtPainter->background();
        QPen savedPen = m_qtPainter->pen();

        //Use text colors
        m_qtPainter->setBackground(QBrush(m_textBackgroundColour.GetQColor()));
        m_qtPainter->setPen(QPen(m_textForegroundColour.GetQColor()));

        //Draw
        m_qtPainter->drawPixmap(x, y, pix);

        //Restore saved settings
        m_qtPainter->setBackground(savedBrush);
        m_qtPainter->setPen(savedPen);
    }
    else
    {
            if ( useMask && bmp.GetMask() && bmp.GetMask()->GetHandle() )
                pix.setMask(*bmp.GetMask()->GetHandle());
            m_qtPainter->drawPixmap(x, y, pix);
    }
}

 void SetPixmap(const wxBitmap& bitmap)
 {
     if (bitmap.Ok())
     {
         GdkBitmap *mask = bitmap.GetMask() ? bitmap.GetMask()->GetBitmap()
                                            : (GdkBitmap *)NULL;
         gtk_pixmap_set( GTK_PIXMAP(m_pixmap), bitmap.GetPixmap(), mask );
     }
 }

// Create a drag image from a bitmap and optional cursor
bool wxDragImage::Create(const wxBitmap& image, const wxCursor& cursor)
{
    if ( m_hImageList )
        ImageList_Destroy(GetHimageList());
    m_hImageList = 0;

#ifdef __WXWINCE__
    UINT flags = ILC_COLOR;
#else
    UINT flags wxDUMMY_INITIALIZE(0) ;
    if (image.GetDepth() <= 4)
        flags = ILC_COLOR4;
    else if (image.GetDepth() <= 8)
        flags = ILC_COLOR8;
    else if (image.GetDepth() <= 16)
        flags = ILC_COLOR16;
    else if (image.GetDepth() <= 24)
        flags = ILC_COLOR24;
    else
        flags = ILC_COLOR32;
#endif

    bool mask = (image.GetMask() != 0);

    // Curiously, even if the image doesn't have a mask,
    // we still have to use ILC_MASK or the image won't show
    // up when dragged.
//    if ( mask )
    flags |= ILC_MASK;

    m_hImageList = (WXHIMAGELIST) ImageList_Create(image.GetWidth(), image.GetHeight(), flags, 1, 1);

    int index;
    if (!mask)
    {
        HBITMAP hBitmap1 = (HBITMAP) image.GetHBITMAP();
        index = ImageList_Add(GetHimageList(), hBitmap1, 0);
    }
    else
    {
        HBITMAP hBitmap1 = (HBITMAP) image.GetHBITMAP();
        HBITMAP hBitmap2 = (HBITMAP) image.GetMask()->GetMaskBitmap();
        HBITMAP hbmpMask = wxInvertMask(hBitmap2);

        index = ImageList_Add(GetHimageList(), hBitmap1, hbmpMask);
        ::DeleteObject(hbmpMask);
    }
    if ( index == -1 )
    {
        wxLogError(_("Couldn't add an image to the image list."));
    }
    m_cursor = cursor; // Can only combine with drag image after calling BeginDrag.

    return (index != -1) ;
}

void wxGCDCImpl::DoDrawBitmap( const wxBitmap &bmp, wxCoord x, wxCoord y,
                               bool useMask )
{
    wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawBitmap - invalid DC") );
    wxCHECK_RET( bmp.IsOk(), wxT("wxGCDC(cg)::DoDrawBitmap - invalid bitmap") );

    int w = bmp.GetScaledWidth();
    int h = bmp.GetScaledHeight();
    if ( bmp.GetDepth() == 1 )
    {
        m_graphicContext->SetPen(*wxTRANSPARENT_PEN);
        m_graphicContext->SetBrush(m_textBackgroundColour);
        m_graphicContext->DrawRectangle( x, y, w, h );
        m_graphicContext->SetBrush(m_textForegroundColour);
        m_graphicContext->DrawBitmap( bmp, x, y, w, h );
        m_graphicContext->SetBrush( m_graphicContext->CreateBrush(m_brush));
        m_graphicContext->SetPen( m_graphicContext->CreatePen(m_pen));
    }
    else // not a monochrome bitmap, handle it normally
    {
        // make a copy in case we need to remove its mask, if we don't modify
        // it the copy is cheap as bitmaps are reference-counted
        wxBitmap bmpCopy(bmp);
        if ( !useMask && bmp.GetMask() )
            bmpCopy.SetMask(NULL);

        m_graphicContext->DrawBitmap( bmpCopy, x, y, w, h );
    }

    CalcBoundingBox(x, y);
    CalcBoundingBox(x + w, y + h);
}

void wxGenericBrush::SetStipple(const wxBitmap& stipple)
{
    wxCHECK_RET(Ok(), wxT("Invalid generic brush"));
    M_GBRUSHDATA->m_stipple = stipple;
    M_GBRUSHDATA->m_style = stipple.GetMask() ? wxSTIPPLE_MASK_OPAQUE : wxSTIPPLE;

}

void wxMemoryDC::SelectObject( const wxBitmap& bitmap )
{
    if ( m_selected.Ok() )
    {
        UnlockPixels( GetGWorldPixMap(MAC_WXHBITMAP(m_selected.GetHBITMAP())) );
    }
    m_selected = bitmap;
    if (m_selected.Ok())
    {
        if ( m_selected.GetHBITMAP() )
        {
            m_macPort = (GrafPtr) m_selected.GetHBITMAP() ;
            LockPixels( GetGWorldPixMap(  (CGrafPtr)  m_macPort ) ) ;
            wxMask * mask = bitmap.GetMask() ;
            if ( mask )
            {
                m_macMask = mask->GetMaskBitmap() ;
            }
            SetRectRgn( (RgnHandle) m_macBoundaryClipRgn , 0 , 0 , m_selected.GetWidth() , m_selected.GetHeight() ) ;
            CopyRgn( (RgnHandle) m_macBoundaryClipRgn ,(RgnHandle)  m_macCurrentClipRgn ) ;
            m_ok = TRUE ;
        }
        else
        {
            m_ok = FALSE;
        }
    }
    else
    {
        m_ok = FALSE;
    }
}

void wxDC::DoDrawSubBitmap(const wxBitmap &bmp,
                           wxCoord x, wxCoord y, wxCoord w, wxCoord h,
                           wxCoord destx, wxCoord desty, int rop, bool useMask)
{
    wxCHECK_RET( Ok(), wxT("invalid dc") );
    wxCHECK_RET( bmp.Ok(), wxT("invalid bitmap") );

    // NB: we could also support XOR here (via DSBLIT_XOR)
    //     and possibly others via SetSrc/DstBlendFunction()
    wxCHECK_RET( rop == wxCOPY, _T("only wxCOPY function supported") );

    if ( bmp.GetDepth() == 1 )
    {
        // Mono bitmaps are handled in special way -- all 1s are drawn in
        // foreground colours, all 0s in background colour.
        wxFAIL_MSG( _T("drawing mono bitmaps not implemented") );
        return;
    }

    if ( useMask && bmp.GetMask() )
    {
        // FIXME_DFB: see MGL sources for a way to do it, but it's not directly
        //            applicable because DirectFB doesn't implement ROPs; OTOH,
        //            it has blitting modes that can be useful; finally, see
        //            DFB's SetSrcBlendFunction() and SetSrcColorKey()
        wxFAIL_MSG( _T("drawing bitmaps with masks not implemented") );
        return;
    }

    DoBlitFromSurface(bmp.GetDirectFBSurface(),
                      x, y,
                      w, h,
                      destx, desty);
}

wxBrush::wxBrush( const wxBitmap &stippleBitmap )
{
    wxBrushStyle style = wxBRUSHSTYLE_STIPPLE;
    if (stippleBitmap.GetMask())
        style = wxBRUSHSTYLE_STIPPLE_MASK_OPAQUE;

    m_refData = new wxBrushRefData(*wxBLACK, style);
    M_BRUSHDATA->m_stipple = stippleBitmap;
}

void wxGenericBrush::Create( const wxBitmap &stipple )
{
    UnRef();
    wxCHECK_RET(stipple.Ok(), wxT("Invalid bitmap in wxGenericBrush::Create"));

    int style = stipple.GetMask() ? wxSTIPPLE_MASK_OPAQUE : wxSTIPPLE;
    m_refData = new wxGenericBrushRefData(wxNullGenericColour, style);
    M_GBRUSHDATA->m_stipple = stipple;
}

void wxBitmapToPixPattern(const wxBitmap& bitmap,
                          pixpattern24_t *pix, pattern_t *mask)
{
    wxMemoryDC mem;
    MGLDevCtx *dc;
    int x, y;

    if ( pix != NULL )
    {
        mem.SelectObjectAsSource(bitmap);
        dc = mem.GetMGLDC();
        wxCurrentDCSwitcher curDC(dc);
        dc->beginPixel();
        for (y = 0; y < 8; y++)
            for (x = 0; x < 8; x++)
                dc->unpackColorFast(dc->getPixelFast(x, y),
                                    pix->p[y][x][2],
                                    pix->p[y][x][1],
                                    pix->p[y][x][0]);
        dc->endPixel();
    }

    if ( mask && bitmap.GetMask() )
    {
        mem.SelectObjectAsSource(bitmap.GetMask()->GetBitmap());
        dc = mem.GetMGLDC();
        wxCurrentDCSwitcher curDC(dc);
        dc->beginPixel();
        for (y = 0; y < 8; y++)
        {
            mask->p[y] = 0;
            for (x = 0; x < 8; x++)
                if ( dc->getPixelFast(x, y) != 0 )
                    mask->p[y] = (uchar)(mask->p[y] | (1 << (7 - x)));
        }
        dc->endPixel();
    }
}

bool wxRegion::Union(const wxBitmap& bmp)
{
    if (bmp.GetMask())
    {
        wxImage image = bmp.ConvertToImage();
        wxASSERT_MSG( image.HasMask(), _T("wxBitmap::ConvertToImage doesn't preserve mask?") );
        return DoRegionUnion(*this, image,
                             image.GetMaskRed(),
                             image.GetMaskGreen(),
                             image.GetMaskBlue(),
                             0);
    }
    else
    {
        return Union(0, 0, bmp.GetWidth(), bmp.GetHeight());
    }
}

static HBITMAP GetMaskForImage(const wxBitmap& bitmap, const wxBitmap& mask)
{
#if wxUSE_IMAGE
    wxBitmap bitmapWithMask;
#endif // wxUSE_IMAGE

    HBITMAP hbmpMask;
    wxMask *pMask;
    bool deleteMask = false;

    if ( mask.IsOk() )
    {
        hbmpMask = GetHbitmapOf(mask);
        pMask = NULL;
    }
    else
    {
        pMask = bitmap.GetMask();

#if wxUSE_IMAGE
        // check if we don't have alpha in this bitmap -- we can create a mask
        // from it (and we need to do it for the older systems which don't
        // support 32bpp bitmaps natively)
        if ( !pMask )
        {
            wxImage img(bitmap.ConvertToImage());
            if ( img.HasAlpha() )
            {
                img.ConvertAlphaToMask();
                bitmapWithMask = wxBitmap(img);
                pMask = bitmapWithMask.GetMask();
            }
        }
#endif // wxUSE_IMAGE

        if ( !pMask )
        {
            // use the light grey count as transparent: the trouble here is
            // that the light grey might have been changed by Windows behind
            // our back, so use the standard colour map to get its real value
            wxCOLORMAP *cmap = wxGetStdColourMap();
            wxColour col;
            wxRGBToColour(col, cmap[wxSTD_COL_BTNFACE].from);

            pMask = new wxMask(bitmap, col);

            deleteMask = true;
        }

        hbmpMask = (HBITMAP)pMask->GetMaskBitmap();
    }

    // windows mask convention is opposite to the wxWidgets one
    HBITMAP hbmpMaskInv = wxInvertMask(hbmpMask);

    if ( deleteMask )
    {
        delete pMask;
    }

    return hbmpMaskInv;
}

void wxIcon::CopyFromBitmap(
  const wxBitmap&                   rBmp
)
{
    wxMask*                         pMask = rBmp.GetMask();
    HBITMAP                         hBmp = NULLHANDLE;
    HBITMAP                         hBmpMask = NULLHANDLE;
    HBITMAP                         hOldBitmap = NULLHANDLE;
    ERRORID                         vError;
    wxString                        sError;
    LONG                            lHits;

    if (!pMask)
    {
        //
        // We must have a mask for an icon, so even if it's probably incorrect,
        // do create it (grey is the "standard" transparent colour)
        //
        pMask = new wxMask( rBmp
                           ,*wxLIGHT_GREY
                          );
    }

    BITMAPINFOHEADER2               vHeader;
    SIZEL                           vSize = {0, 0};
    DEVOPENSTRUC                    vDop = {0L, "DISPLAY", NULL, 0L, 0L, 0L, 0L, 0L, 0L};
    HDC                             hDCSrc = ::DevOpenDC(vHabmain, OD_MEMORY, "*", 5L, (PDEVOPENDATA)&vDop, NULLHANDLE);
    HDC                             hDCDst = ::DevOpenDC(vHabmain, OD_MEMORY, "*", 5L, (PDEVOPENDATA)&vDop, NULLHANDLE);
    HPS                             hPSSrc = ::GpiCreatePS(vHabmain, hDCSrc, &vSize, PU_PELS | GPIA_ASSOC);
    HPS                             hPSDst = ::GpiCreatePS(vHabmain, hDCDst, &vSize, PU_PELS | GPIA_ASSOC);
    POINTL                          vPoint[4] = { {0, 0}, {rBmp.GetWidth(), rBmp.GetHeight()},
                                                  {0, 0}, {rBmp.GetWidth(), rBmp.GetHeight()}
                                                };
    POINTL                          vPointMask[4] = { {0, 0}, {rBmp.GetWidth(), rBmp.GetHeight() * 2},
                                                      {0, 0}, {rBmp.GetWidth(), rBmp.GetHeight()}
                                                    };

    POINTERINFO                     vIconInfo;

    memset(&vIconInfo, '\0', sizeof(POINTERINFO));
    vIconInfo.fPointer = FALSE;  // we want an icon, not a pointer

    memset(&vHeader, '\0', 16);
    vHeader.cbFix           = 16;
    vHeader.cx              = (ULONG)rBmp.GetWidth();
    vHeader.cy              = (ULONG)rBmp.GetHeight();
    vHeader.cPlanes         = 1L;
    vHeader.cBitCount       = 24;

    hBmp = ::GpiCreateBitmap( hPSDst
                             ,&vHeader
                             ,0L
                             ,NULL
                             ,NULL
                            );

    if ((hOldBitmap = ::GpiSetBitmap(hPSDst, hBmp)) == HBM_ERROR)
    {
        vError = ::WinGetLastError(vHabmain);
        sError = wxPMErrorToStr(vError);
    }
    if ((hOldBitmap = ::GpiSetBitmap(hPSSrc, (HBITMAP)rBmp.GetHBITMAP())) == HBM_ERROR)
    {
        vError = ::WinGetLastError(vHabmain);
        sError = wxPMErrorToStr(vError);
    }
    if ((lHits = ::GpiBitBlt( hPSDst
                             ,hPSSrc
                             ,4L
                             ,vPoint
                             ,ROP_SRCCOPY
                             ,BBO_IGNORE
                            )) == GPI_ERROR)
    {
        vError = ::WinGetLastError(vHabmain);
        sError = wxPMErrorToStr(vError);
    }
    if ((hOldBitmap = ::GpiSetBitmap(hPSDst, NULLHANDLE)) == HBM_ERROR)
    {
        vError = ::WinGetLastError(vHabmain);
        sError = wxPMErrorToStr(vError);
    }
    if ((hOldBitmap = ::GpiSetBitmap(hPSSrc, NULLHANDLE)) == HBM_ERROR)
    {
        vError = ::WinGetLastError(vHabmain);
        sError = wxPMErrorToStr(vError);
    }
    vIconInfo.hbmColor = hBmp;

    vHeader.cy              = (ULONG)rBmp.GetHeight() * 2;
    hBmpMask = ::GpiCreateBitmap( hPSDst
                                 ,&vHeader
                                 ,0L
                                 ,NULL
                                 ,NULL
                                );

    if ((hOldBitmap = ::GpiSetBitmap(hPSDst, hBmpMask)) == HBM_ERROR)
    {
        vError = ::WinGetLastError(vHabmain);
//.........这里部分代码省略.........