C++ wxBitmap类代码示例

void wxGTKCairoDCImpl::DoDrawBitmap(const wxBitmap& bitmap, int x, int y, bool useMask)
{
    wxCHECK_RET(IsOk(), "invalid DC");

    cairo_t* cr = NULL;
    if (m_graphicContext)
        cr = static_cast<cairo_t*>(m_graphicContext->GetNativeContext());
    if (cr)
    {
        cairo_save(cr);
        bitmap.Draw(cr, x, y, useMask, &m_textForegroundColour, &m_textBackgroundColour);
        cairo_restore(cr);
    }
}

void wxDC::DoDrawBitmap( const wxBitmap& bitmap, wxCoord x, wxCoord y, bool useMask )
{
    wxCHECK_RET( bitmap.Ok(), "invalid bitmap" );

    wxMemoryDC memDC;
    memDC.SelectObjectAsSource(bitmap);

#if 0
    // Not sure if we need this. The mask should leave the masked areas as per
    // the original background of this DC.
    if (useMask)
    {
        // There might be transparent areas, so make these the same colour as this
        // DC
        memDC.SetBackground(* GetBackground());
        memDC.Clear();
    }
#endif // 0

    Blit(x, y, bitmap.GetWidth(), bitmap.GetHeight(), &memDC, 0, 0, wxCOPY, useMask);

    memDC.SelectObject(wxNullBitmap);
}

bool wxBitmapButton::Create( wxWindow *parent,
                             wxWindowID id,
                             const wxBitmap& bitmap,
                             const wxPoint& pos,
                             const wxSize& size,
                             long style,
                             const wxValidator& validator,
                             const wxString &name )
{
    m_needParent = true;
    m_acceptsFocus = true;

    if (!PreCreation( parent, pos, size ) ||
        !CreateBase( parent, id, pos, size, style, validator, name ))
    {
        wxFAIL_MSG( wxT("wxBitmapButton creation failed") );
        return false;
    }

    m_bitmaps[State_Normal] = bitmap;

    m_widget = gtk_button_new();

    if (style & wxNO_BORDER)
       gtk_button_set_relief( GTK_BUTTON(m_widget), GTK_RELIEF_NONE );

    if (bitmap.IsOk())
    {
        OnSetBitmap();
    }

    gtk_signal_connect_after( GTK_OBJECT(m_widget), "clicked",
      GTK_SIGNAL_FUNC(gtk_bmpbutton_clicked_callback), (gpointer*)this );

    gtk_signal_connect( GTK_OBJECT(m_widget), "enter",
      GTK_SIGNAL_FUNC(gtk_bmpbutton_enter_callback), (gpointer*)this );
    gtk_signal_connect( GTK_OBJECT(m_widget), "leave",
      GTK_SIGNAL_FUNC(gtk_bmpbutton_leave_callback), (gpointer*)this );
    gtk_signal_connect( GTK_OBJECT(m_widget), "pressed",
      GTK_SIGNAL_FUNC(gtk_bmpbutton_press_callback), (gpointer*)this );
    gtk_signal_connect( GTK_OBJECT(m_widget), "released",
      GTK_SIGNAL_FUNC(gtk_bmpbutton_release_callback), (gpointer*)this );

    m_parent->DoAddChild( this );

    PostCreation(size);

    return true;
}

bool wxRegion::Union(const wxBitmap& bmp,
                     const wxColour& transColour,
                     int   tolerance)
{
#if (!defined(__WXMSW__) || wxUSE_WXDIB)
    wxImage image = bmp.ConvertToImage();
    return DoRegionUnion(*this, image,
                         transColour.Red(),
                         transColour.Green(),
                         transColour.Blue(),
                         tolerance);
#else
    return false;
#endif                         
}

wxSize clAuiSimpleTabArt::GetTabSize(wxDC& dc,
                                     wxWindow* WXUNUSED(wnd),
                                     const wxString& caption,
                                     const wxBitmap& bitmap,
                                     bool WXUNUSED(active),
                                     int close_button_state,
                                     int* x_extent)
{
	wxCoord measured_textx, measured_texty;

	dc.SetFont(m_measuring_font);
	dc.GetTextExtent(caption, &measured_textx, &measured_texty);

	wxCoord base_height = measured_texty;
	wxCoord base_width  = measured_textx;

	if(bitmap.IsOk()) {
		if(bitmap.GetHeight() > base_height)
			base_height = bitmap.GetHeight();
		base_width += bitmap.GetWidth() + 2;
	}

	wxCoord tab_height = base_height + 6;
	wxCoord tab_width  = base_width + tab_height + 5;

	if (close_button_state != wxAUI_BUTTON_STATE_HIDDEN)
		tab_width += m_active_close_bmp.GetWidth();

	if (m_flags & wxAUI_NB_TAB_FIXED_WIDTH) {
		tab_width = m_fixed_tab_width;
	}

	*x_extent = tab_width - (tab_height/2) - 1;

	return wxSize(tab_width, tab_height);
}

int wxGenericImageList::Add( const wxBitmap &bitmap )
{
    wxASSERT_MSG( (bitmap.GetWidth() >= m_width && bitmap.GetHeight() == m_height)
                  || (m_width == 0 && m_height == 0),
                  wxT("invalid bitmap size in wxImageList: this might work ")
                  wxT("on this platform but definitely won't under Windows.") );

    const int index = int(m_images.GetCount());

    if (bitmap.IsKindOf(wxCLASSINFO(wxIcon)))
    {
        m_images.Append( new wxIcon( (const wxIcon&) bitmap ) );
    }
    else
    {
        // Mimic behaviour of Windows ImageList_Add that automatically breaks up the added
        // bitmap into sub-images of the correct size
        if (m_width > 0 && bitmap.GetWidth() > m_width && bitmap.GetHeight() >= m_height)
        {
            int numImages = bitmap.GetWidth() / m_width;
            for (int subIndex = 0; subIndex < numImages; subIndex++)
            {
                wxRect rect(m_width * subIndex, 0, m_width, m_height);
                wxBitmap tmpBmp = bitmap.GetSubBitmap(rect);
                m_images.Append( new wxBitmap(tmpBmp) );
            }
        }
        else
        {
            m_images.Append( new wxBitmap(bitmap) );
        }
    }

    if (m_width == 0 && m_height == 0)
    {
        m_width = bitmap.GetWidth();
        m_height = bitmap.GetHeight();
    }

    return index;
}

static void wxDrawSplashBitmap(wxDC& dc, const wxBitmap& bitmap, int WXUNUSED(x), int WXUNUSED(y))
{
    wxMemoryDC dcMem;

#ifdef USE_PALETTE_IN_SPLASH
    bool hiColour = (wxDisplayDepth() >= 16) ;

    if (bitmap.GetPalette() && !hiColour)
    {
        dcMem.SetPalette(* bitmap.GetPalette());
    }
#endif // USE_PALETTE_IN_SPLASH

    dcMem.SelectObjectAsSource(bitmap);
    dc.Blit(0, 0, bitmap.GetWidth(), bitmap.GetHeight(), & dcMem, 0, 0);
    dcMem.SelectObject(wxNullBitmap);

#ifdef USE_PALETTE_IN_SPLASH
    if (bitmap.GetPalette() && !hiColour)
    {
        dcMem.SetPalette(wxNullPalette);
    }
#endif // USE_PALETTE_IN_SPLASH
}

bool
wxSVGBitmapFileHandler::ProcessBitmap(const wxBitmap& bmp,
                                      wxCoord x, wxCoord y,
                                      wxOutputStream& stream) const
{
    static int sub_images = 0;

    if ( wxImage::FindHandler(wxBITMAP_TYPE_PNG) == NULL )
        wxImage::AddHandler(new wxPNGHandler);

    // find a suitable file name
    wxString sPNG;
    do
    {
        sPNG = wxString::Format("image%d.png", sub_images++);
    }
    while (wxFile::Exists(sPNG));

    if ( !bmp.SaveFile(sPNG, wxBITMAP_TYPE_PNG) )
        return false;

    // reference the bitmap from the SVG doc using only filename & ext
    sPNG = sPNG.AfterLast(wxFileName::GetPathSeparator());

    // reference the bitmap from the SVG doc
    wxString s;
    s += wxString::Format("  <image x=\"%d\" y=\"%d\" width=\"%dpx\" height=\"%dpx\"",
                          x, y, bmp.GetWidth(), bmp.GetHeight());
    s += wxString::Format(" xlink:href=\"%s\"/>\n", sPNG);

    // write to the SVG file
    const wxCharBuffer buf = s.utf8_str();
    stream.Write(buf, strlen((const char *)buf));

    return stream.IsOk();
}

void wxPrinterDC::DoDrawBitmap(
  const wxBitmap&                   rBmp
, wxCoord                           vX
, wxCoord                           vY
, bool                              bUseMask
)
{
    wxCHECK_RET( rBmp.Ok(), _T("invalid bitmap in wxPrinterDC::DrawBitmap") );

//    int                             nWidth  = rBmp.GetWidth();
//    int                             nHeight = rBmp.GetHeight();

    // TODO:

} // end of wxPrinterDC::DoDrawBitmap

void Image::LoadImage(const wxBitmap &bitmap)
{
  // Convert the bitmap to a png image we can use as m_compressedImage
  wxImage image = bitmap.ConvertToImage();
  wxMemoryOutputStream stream;
  image.SaveFile(stream,wxBITMAP_TYPE_PNG);
  m_compressedImage.AppendData(stream.GetOutputStreamBuffer()->GetBufferStart(),
			       stream.GetOutputStreamBuffer()->GetBufferSize());

  // Set the info about the image.
  m_extension = wxT("png");
  m_originalWidth  = image.GetWidth();
  m_originalHeight = image.GetHeight();
  m_scaledBitmap.Create (1,1);
}

bool wxWizard::ResizeBitmap(wxBitmap& bmp)
{
    if (!GetBitmapPlacement())
        return false;

    if (bmp.Ok())
    {
        wxSize pageSize = m_sizerPage->GetSize();
        if (pageSize == wxSize(0,0))
            pageSize = GetPageSize();
        int bitmapWidth = wxMax(bmp.GetWidth(), GetMinimumBitmapWidth());
        int bitmapHeight = pageSize.y;

        if (!m_statbmp->GetBitmap().Ok() || m_statbmp->GetBitmap().GetHeight() != bitmapHeight)
        {
            wxBitmap bitmap(bitmapWidth, bitmapHeight);
            {
                wxMemoryDC dc;
                dc.SelectObject(bitmap);
                dc.SetBackground(wxBrush(m_bitmapBackgroundColour));
                dc.Clear();

                if (GetBitmapPlacement() & wxWIZARD_TILE)
                {
                    TileBitmap(wxRect(0, 0, bitmapWidth, bitmapHeight), dc, bmp);
                }
                else
                {
                    int x, y;

                    if (GetBitmapPlacement() & wxWIZARD_HALIGN_LEFT)
                        x = 0;
                    else if (GetBitmapPlacement() & wxWIZARD_HALIGN_RIGHT)
                        x = bitmapWidth - bmp.GetWidth();
                    else
                        x = (bitmapWidth - bmp.GetWidth())/2;

                    if (GetBitmapPlacement() & wxWIZARD_VALIGN_TOP)
                        y = 0;
                    else if (GetBitmapPlacement() & wxWIZARD_VALIGN_BOTTOM)
                        y = bitmapHeight - bmp.GetHeight();
                    else
                        y = (bitmapHeight - bmp.GetHeight())/2;

                    dc.DrawBitmap(bmp, x, y, true);
                    dc.SelectObject(wxNullBitmap);
                }
            }

            bmp = bitmap;
        }
    }

    return true;
}

OutputViewControlBarButton::OutputViewControlBarButton(wxWindow* win, const wxString& title, const wxBitmap& bmp, long style)
		: wxPanel(win)
		, m_state(Button_Normal)
		, m_text (title)
		, m_bmp  (bmp)
		, m_style (style)
{
	if ( title.IsEmpty() && bmp.IsOk() == false ) return;

	SetSizeHints(DoCalcButtonWidth( this,
	                                m_style & Button_UseText  ? m_text : wxT(""),
	                                m_bmp,
	                                m_style & Button_UseXSpacer ? BUTTON_SPACER_X : 1),

	             DoCalcButtonHeight(this, wxEmptyString, m_bmp, BUTTON_SPACER_Y));
}

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

    if ( bmp.GetDepth() == 1 )
    {
        m_graphicContext->SetPen(*wxTRANSPARENT_PEN);
        m_graphicContext->SetBrush( wxBrush( m_textBackgroundColour , wxSOLID ) );
        m_graphicContext->DrawRectangle( x , y , bmp.GetWidth() , bmp.GetHeight() );        
        m_graphicContext->SetBrush( wxBrush( m_textForegroundColour , wxSOLID ) );
        m_graphicContext->DrawBitmap( bmp, x , y , bmp.GetWidth() , bmp.GetHeight() );
        m_graphicContext->SetBrush( m_graphicContext->CreateBrush(m_brush));
        m_graphicContext->SetPen( m_graphicContext->CreatePen(m_pen));
    }
    else
        m_graphicContext->DrawBitmap( bmp, x , y , bmp.GetWidth() , bmp.GetHeight() );
}

wxBitmap KiScaledBitmap( const wxBitmap& aBitmap, EDA_BASE_FRAME* aWindow )
{
    const int scale = get_scale_factor( aWindow );

    if( scale == 4)
    {
        return wxBitmap( aBitmap );
    }
    else
    {
        wxImage image = aBitmap.ConvertToImage();
        image.Rescale( scale * image.GetWidth() / 4, scale * image.GetHeight() / 4,
            wxIMAGE_QUALITY_BILINEAR );

        return wxBitmap( image );
    }
}

bool BitmapFromWindow(wxWindow *window, wxBitmap& bitmap)
{
    bool ret;
    wxMemoryDC mdc;
    wxClientDC cdc(window);
    const wxSize& size=window->GetClientSize();

    window->Raise();
    wxTheApp->Yield();

    bitmap.Create(size.x, size.y);
    mdc.SelectObject(bitmap);
    ret=mdc.Blit(0, 0, size.x, size.y, &cdc, 0, 0);
    mdc.SelectObject(wxNullBitmap);

    return ret;
}