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public interface HMatte
HMatte
is the base interface for all
matte classes.
Where pixels in a component already have an alpha value (e.g. from
an image), the alpha value from the component and the alpha value
from the HMatte
are multiplied together
to obtain the actual alpha value to be used for that pixel.
The final displayed value of the component and its HMatte
is obviously subject to the capabilities
of the underlying hardware platform.
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