pub struct SoftMask { /* private fields */ }
Expand description
A soft mask is used for transparent images such as PNG with an alpha component
The bytes range from 0xFF (opaque) to 0x00 (transparent). The alpha channel of a
PNG image have to be sorted out.
Can also be used for Vignettes, etc.
Beware of color spaces!
See PDF Reference Page 545 - Soft masks
Performs copy-assignment from
source
.
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Formats the value using the given formatter.
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This method tests for
self
and
other
values to be equal, and is used
by
==
.
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This method tests for
!=
. The default implementation is almost always
sufficient, and should not be overridden without very good reason.
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Immutably borrows from an owned value.
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Mutably borrows from an owned value.
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Returns the argument unchanged.
Calls U::from(self)
.
That is, this conversion is whatever the implementation of
From<T> for U
chooses to do.
Sets value
as a parameter of self
.
The resulting type after obtaining ownership.
Creates owned data from borrowed data, usually by cloning.
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Uses borrowed data to replace owned data, usually by cloning.
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The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.