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The current stroking alpha constant, specifying the
constant shape or constant opacity value to be used
for stroking operations in the transparent imaging model.
The alpha source flag (alpha is shape), specifying
whether the current soft mask and alpha constant
are to be interpreted as shape values (true) or
opacity values (false).
The graphics transparency, with 0 being fully opaque and 1 being fully transparent.
This is a convenience method setting proper values for strokealpha and fillalpha.
The graphics opacity , with 1 being fully opaque and 0 being fully transparent.
This is a convenience method setting proper values for strokealpha and fillalpha.