background.cxx

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 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
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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 )
        return;
 
    // 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.GetAlphaMask()))));
        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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