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ClipMask

Struct ClipMask 

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pub struct ClipMask {
    pub width: u32,
    pub height: u32,
    pub bits: Vec<bool>,
}
Expand description

クリップ領域(clip())。画素ごとに「描いてよいか」を持つ。

走査線ベースの塗りに合わせて、パスをその場でラスタライズして持つ。 領域を式のまま持つと、交差のたびに判定が複雑になっていく。

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§width: u32§height: u32§bits: Vec<bool>

true の画素だけ描ける。長さは width * height

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impl ClipMask

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pub fn from_path( width: u32, height: u32, subpaths: &[SubPath], rule: FillRule, ) -> ClipMask

パスからクリップ領域を作る。塗りと同じ走査線・同じ巻き数規則を使う。

塗りとずれた判定をすると、クリップの縁に 1px の隙間や food が出る。

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pub fn intersect(&self, other: &ClipMask) -> ClipMask

2 つのクリップ領域の交わり。clip() は既存の領域を狭めるだけで、 広げることはできない(仕様)。

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pub fn allows(&self, x: i32, y: i32) -> bool

その画素に描いてよいか。範囲外は描けない。

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impl Clone for ClipMask

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fn clone(&self) -> ClipMask

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for ClipMask

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.