The blend mode to be used when transparency is in use.
The BlendMode enumeration may take the following values:
- Normal - Normal.
- Multiply - Multiply source and backdrop colors.
- Screen - Multiply complements of souurce and backdrop colors
and then complement the output.
- Overlay - Multiplies of screens depending on backdrop.
- Darken - Minimum of source and backdrop.
- Lighten - Maximum of source and backdrop.
- ColorDodge - Brightens the backdrop.
- ColorBurn - Darkens the backdrop.
- HardLight - Like shining a spotlight on the backrop.
- SoftLight - Like shining a light on the backrop.
- Difference - Finds the difference between th colors.
- Exclusion - A lower contrast difference.
- Hue - Hue of source, saturation and luminescence of
backdrop.
- Saturation - Saturation of source, hue and luminescence of
backdrop.
- Color - Hue and saturation of source, luminescence of
backdrop.
- Luminosity - Luminosity of source, hue and saturation of
backdrop.
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