background.cxx

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#include <vcl/virdev.hxx>

Color OutputDevice::GetBackgroundColor() const
{
    return GetBackground().GetColor();
}

void OutputDevice::SetBackground()
{

    maBackground = Wallpaper();
    mbBackground = false;

    if( mpAlphaVDev )
        mpAlphaVDev->SetBackground();
}

void OutputDevice::SetBackground( const Wallpaper& rBackground )
{

    maBackground = rBackground;

    if( rBackground.GetStyle() == WallpaperStyle::NONE )
        mbBackground = false;
    else
        mbBackground = true;

    if( mpAlphaVDev )
    {
        // Some of these are probably wrong (e.g. if the gradient has transparency),
        // but hopefully nobody uses that. If you do, feel free to implement it properly.
        if( rBackground.GetStyle() == WallpaperStyle::NONE )
        {
            mpAlphaVDev->SetBackground( rBackground );
        }
        else if( rBackground.IsBitmap())
        {
            BitmapEx bitmap = rBackground.GetBitmap();
            if( bitmap.IsAlpha())
                mpAlphaVDev->SetBackground( Wallpaper( BitmapEx( Bitmap( bitmap.GetAlpha()))));
            else
                mpAlphaVDev->SetBackground( Wallpaper( COL_BLACK ));
        }
        else if( rBackground.IsGradient())
        {
            mpAlphaVDev->SetBackground( Wallpaper( COL_BLACK ));
        }
        else
        {
            // Color background.
            int transparency = 255 - rBackground.GetColor().GetAlpha();
            mpAlphaVDev->SetBackground( Wallpaper( Color( transparency, transparency, transparency )));
        }
    }
}


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