C++ OSGraphics类代码示例

void Win32Graphics::drawGraphics( const OSGraphics &rGraphics, int xSrc,
                                  int ySrc, int xDest, int yDest, int width,
                                  int height )
{
    if( width == -1 )
    {
        width = rGraphics.getWidth();
    }
    if( height == -1 )
    {
        height = rGraphics.getHeight();
    }

    // Create the mask for transparency
    HRGN mask = CreateRectRgn( xSrc, ySrc, xSrc + width, ySrc + height );
    CombineRgn( mask, ((Win32Graphics&)rGraphics).getMask(), mask, RGN_AND );
    OffsetRgn( mask, xDest - xSrc, yDest - ySrc );

    // Copy the image
    HDC srcDC = ((Win32Graphics&)rGraphics).getDC();
    SelectClipRgn( m_hDC, mask );
    BitBlt( m_hDC, xDest, yDest, width, height, srcDC, xSrc, ySrc, SRCCOPY );

    // Add the source mask to the mask of the graphics
    CombineRgn( m_mask, mask, m_mask, RGN_OR );
    DeleteObject( mask );
}

void Win32Graphics::drawGraphics( const OSGraphics &rGraphics, int xSrc,
                                  int ySrc, int xDest, int yDest, int width,
                                  int height )
{
    // check and adapt to source if needed
    if( !checkBoundaries( 0, 0, rGraphics.getWidth(), rGraphics.getHeight(),
                          xSrc, ySrc, width, height ) )
    {
        msg_Err( getIntf(), "nothing to draw from graphics source" );
        return;
    }

    // check destination
    if( !checkBoundaries( 0, 0, m_width, m_height,
                          xDest, yDest, width, height ) )
    {
        msg_Err( getIntf(), "out of reach destination! pls, debug your skin" );
        return;
    }

    // Create the mask for transparency
    HRGN mask = CreateRectRgn( xSrc, ySrc, xSrc + width, ySrc + height );
    CombineRgn( mask, ((Win32Graphics&)rGraphics).getMask(), mask, RGN_AND );
    OffsetRgn( mask, xDest - xSrc, yDest - ySrc );

    // Copy the image
    HDC srcDC = ((Win32Graphics&)rGraphics).getDC();
    SelectClipRgn( m_hDC, mask );
    BitBlt( m_hDC, xDest, yDest, width, height, srcDC, xSrc, ySrc, SRCCOPY );

    // Add the source mask to the mask of the graphics
    CombineRgn( m_mask, mask, m_mask, RGN_OR );
    DeleteObject( mask );
}

void TopWindow::updateShape()
{
    // Set the shape of the window
    if( m_pActiveLayout )
    {
        OSGraphics *pImage = m_pActiveLayout->getImage();
        if( pImage )
        {
            pImage->applyMaskToWindow( *getOSWindow() );
        }
    }
}

void Win32Tooltip::show( int left, int top, OSGraphics &rText )
{
    // Source drawable
    HDC srcDC = ((Win32Graphics&)rText).getDC();
    int width = rText.getWidth();
    int height = rText.getHeight();

    // Set the window on top, resize it and show it
    SetWindowPos( m_hWnd, HWND_TOPMOST, left, top, width, height, 0 );
    ShowWindow( m_hWnd, SW_SHOW );

    HDC wndDC = GetDC( m_hWnd );
    BitBlt( wndDC, 0, 0, width, height, srcDC, 0, 0, SRCCOPY );
    ReleaseDC( m_hWnd, wndDC );
}

void CtrlImage::draw( OSGraphics &rImage, int xDest, int yDest )
{
    const Position *pPos = getPosition();
    if( pPos )
    {
        int width = pPos->getWidth();
        int height = pPos->getHeight();

        if( m_resizeMethod == kScale )
        {
            // Use scaling method
            if( width > 0 && height > 0 )
            {
                if( width != m_pImage->getWidth() ||
                    height != m_pImage->getHeight() )
                {
                    OSFactory *pOsFactory = OSFactory::instance( getIntf() );
                    // Rescale the image with the actual size of the control
                    ScaledBitmap bmp( getIntf(), m_rBitmap, width, height );
                    SKINS_DELETE( m_pImage );
                    m_pImage = pOsFactory->createOSGraphics( width, height );
                    m_pImage->drawBitmap( bmp, 0, 0 );
                }
                rImage.drawGraphics( *m_pImage, 0, 0, xDest, yDest );
            }
        }
        else
        {
            // Use mosaic method
            while( width > 0 )
            {
                int curWidth = __MIN( width, m_pImage->getWidth() );
                height = pPos->getHeight();
                int curYDest = yDest;
                while( height > 0 )
                {
                    int curHeight = __MIN( height, m_pImage->getHeight() );
                    rImage.drawGraphics( *m_pImage, 0, 0, xDest, curYDest,
                                         curWidth, curHeight );
                    curYDest += curHeight;
                    height -= m_pImage->getHeight();
                }
                xDest += curWidth;
                width -= m_pImage->getWidth();
            }
        }
    }
}

void CtrlTree::draw( OSGraphics &rImage, int xDest, int yDest )
{
    if( m_pImage )
    {
        rImage.drawGraphics( *m_pImage, 0, 0, xDest, yDest );
    }
}

void CtrlSliderBg::draw( OSGraphics &rImage, int xDest, int yDest )
{
    if( m_pImgSeq )
    {
        if( m_bgWidth > 0 && m_bgHeight > 0 )
        {
            // Compute the resize factors
            float factorX, factorY;
            getResizeFactors( factorX, factorY );

            // Rescale the image with the actual size of the control
            ScaledBitmap bmp( getIntf(), *m_pImgSeq,
                 m_bgWidth * m_nbHoriz - (int)(m_padHoriz * factorX),
                 m_bgHeight * m_nbVert - (int)(m_padVert * factorY) );

            // Locate the right image in the background bitmap
            int x = m_bgWidth * ( m_position % m_nbHoriz );
            int y = m_bgHeight * ( m_position / m_nbHoriz );
            // Draw the background image
            rImage.drawBitmap( bmp, x, y, xDest, yDest,
                               m_bgWidth - (int)(m_padHoriz * factorX),
                               m_bgHeight - (int)(m_padVert * factorY) );
        }
    }
}

void CtrlButton::draw( OSGraphics &rImage, int xDest, int yDest )
{
    if( m_pImg )
    {
        // Draw the current image
        rImage.drawGraphics( *m_pImg, 0, 0, xDest, yDest );
    }
}

void CtrlVideo::draw( OSGraphics &rImage, int xDest, int yDest )
{
    const Position *pPos = getPosition();
    if( pPos )
    {
        // Draw a black rectangle under the video to avoid transparency
        rImage.fillRect( pPos->getLeft(), pPos->getTop(), pPos->getWidth(),
                         pPos->getHeight(), 0 );
    }
}

void CtrlRadialSlider::draw( OSGraphics &rImage, int xDest, int yDest, int w, int h )
{
    const Position *pPos = getPosition();
    rect region( pPos->getLeft(), pPos->getTop(), m_width, m_height );
    rect clip( xDest, yDest, w ,h );
    rect inter;
    if( rect::intersect( region, clip, &inter ) )
        rImage.drawGraphics( *m_pImgSeq,
                              inter.x - region.x,
                              inter.y - region.y + m_position * m_height,
                              inter.x, inter.y,
                              inter.width, inter.height );
}

void AnimBitmap::draw( OSGraphics &rImage, int xDest, int yDest )
{
    // Draw the current frame
    int height = m_pImage->getHeight() / m_nbFrames;
    int ySrc = height * m_curFrame;

    // The old way .... transparency was not taken care of
    // rImage.drawGraphics( *m_pImage, 0, ySrc, xDest, yDest,
    //                      m_pImage->getWidth(), height );

    // A new way .... needs to be tested thoroughly
    rImage.drawBitmap( m_rBitmap, 0, ySrc, xDest, yDest,
                       m_pImage->getWidth(), height, true );
}

void CtrlTree::draw( OSGraphics &rImage, int xDest, int yDest, int w, int h)
{
    const Position *pPos = getPosition();
    rect region( pPos->getLeft(), pPos->getTop(),
                 pPos->getWidth(), pPos->getHeight() );
    rect clip( xDest, yDest, w, h );
    rect inter;

    if( rect::intersect( region, clip, &inter ) && m_pImage )
        rImage.drawGraphics( *m_pImage,
                      inter.x - pPos->getLeft(),
                      inter.y - pPos->getTop(),
                      inter.x, inter.y, inter.width, inter.height );
}

void AnimBitmap::draw( OSGraphics &rImage, int xDest, int yDest, int w, int h,
                       int xOffset, int yOffset )
{
    // Draw the current frame
    int height = m_pImage->getHeight() / m_nbFrames;
    int ySrc = height * m_curFrame;

    // The old way .... transparency was not taken care of
    // rImage.drawGraphics( *m_pImage, 0, ySrc, xDest, yDest,
    //                      m_pImage->getWidth(), height );

    rImage.drawBitmap( m_rBitmap,
                       xOffset, ySrc + yOffset,
                       xDest, yDest, w, h, true );
}

void CtrlText::draw( OSGraphics &rImage, int xDest, int yDest, int w, int h )
{
    rect clip( xDest, yDest, w, h );
    const Position *pPos = getPosition();
    if( m_pCurrImg )
    {
        // Compute the dimensions to draw
        int width = min( m_pCurrImg->getWidth() + m_xPos,
                         getPosition()->getWidth() );
        int height = min( m_pCurrImg->getHeight(), getPosition()->getHeight() );
        // Draw the current image
        if( width > 0 && height > 0 )
        {
            int offset = 0;
            if( m_alignment == kLeft )
            {
                // We align to the left
                offset = 0;
            }
            else if( m_alignment == kRight &&
                     width < getPosition()->getWidth() )

            {
                // The text is shorter than the width of the control, so we
                // can align it to the right
                offset = getPosition()->getWidth() - width;
            }
            else if( m_alignment == kCenter &&
                     width < getPosition()->getWidth() )
            {
                // The text is shorter than the width of the control, so we
                // can center it
                offset = (getPosition()->getWidth() - width) / 2;
            }
            rect region( pPos->getLeft() + offset,
                         pPos->getTop(), width, height );
            rect inter;
            if( rect::intersect( region, clip, &inter ) )
                rImage.drawBitmap( *m_pCurrImg, -m_xPos + inter.x - region.x,
                                   inter.y - region.y,
                                   inter.x, inter.y,
                                   inter.width, inter.height, true );
        }
    }
}

void CtrlVideo::draw( OSGraphics &rImage, int xDest, int yDest, int w, int h)
{
    const Position *pPos = getPosition();
    rect region( pPos->getLeft(), pPos->getTop(),
                 pPos->getWidth(), pPos->getHeight() );
    rect clip( xDest, yDest, w, h );
    rect inter;

    if( rect::intersect( region, clip, &inter ) )
    {
        // Draw a black rectangle under the video to avoid transparency
        rImage.fillRect( inter.x, inter.y, inter.width, inter.height, 0 );
    }

    if( m_pVoutWindow )
    {
        m_pVoutWindow->show();
    }
}