pub fn path_outline(path: &Path, width: f64, join: &Join, cap: &Cap) -> Path {
    assert_ne!(width, 0.0);
    let mut res = Vec::with_capacity(path.0.len() * 4);
    let mut tmp = Vec::with_capacity(4);
    for (pis, closed) in path.continuations() {
        if closed {
            // outer
            let mut it = pis.iter().filter(|pi| !pi.is_zero());
            let m = res.len();
            if let Some(pi) = it.next() {
                path_item_offset(&mut res, pi, width);
            } else {
                continue;
            }
            let first = res[m].left_point();
            for pi in it {
                path_item_offset(&mut tmp, pi, width);
                let s = res.last().unwrap().right_point();
                add_join(&mut res, join, pi.left_point(), s, tmp[0].left_point());
                res.extend(tmp.drain(..));
            }
            let s = res.last().unwrap().right_point();
            add_join(&mut res, join, pis[0].left_point(), s, first);
            res.push(PathItem::CloseAndJump);

            // inner
            let mut it = pis.iter().rev().filter(|pi| !pi.is_zero()).map(|pi| pi.flip());
            let m = res.len();
            path_item_offset(&mut res, &it.next().unwrap(), width);
            let first = res[m].left_point();
            for pi in it {
                path_item_offset(&mut tmp, &pi, width);
                let s = res.last().unwrap().right_point();
                add_join(&mut res, join, pi.left_point(), s, tmp[0].left_point());
                res.extend(tmp.drain(..));
            }
            let s = res.last().unwrap().right_point();
            add_join(&mut res, join, pis[0].left_point(), s, first);
            res.push(PathItem::CloseAndJump);
        } else {
            let mut it = pis.iter().filter(|pi| !pi.is_zero());
            let m = res.len();
            if let Some(pi) = it.next() {
                path_item_offset(&mut res, pi, width);
            } else {
                continue;
            }
            let first = res[m].left_point();
            for pi in it {
                path_item_offset(&mut tmp, pi, width);
                let s = res.last().unwrap().right_point();
                add_join(&mut res, join, pi.left_point(), s, tmp[0].left_point());
                res.extend(tmp.drain(..));
            }
            let mut it = pis.iter().rev().filter(|pi| !pi.is_zero()).map(|pi| pi.flip());
            path_item_offset(&mut tmp, &it.next().unwrap(), width);
            let s = res.last().unwrap().right_point();
            add_cap(&mut res, cap, s, tmp[0].left_point());
            res.extend(tmp.drain(..));
            for pi in it {
                path_item_offset(&mut tmp, &pi, width);
                let s = res.last().unwrap().right_point();
                add_join(&mut res, join, pi.left_point(), s, tmp[0].left_point());
                res.extend(tmp.drain(..));
            }
            let s = res.last().unwrap().right_point();
            add_cap(&mut res, cap, s, first);
            res.push(PathItem::CloseAndJump);
        }
    }
    Path(res)
}
/// Create a path that is outline of given path.
Create a path that is outline of given path.
Create a path that is outline of given path .
pub fn path_outline(path: &Path, width: f64, join: &Join, cap: &Cap) -> Path {
    assert_ne!(width, 0.0);
    let mut res = Vec::with_capacity(path.0.len() * 4);
    let mut tmp = Vec::with_capacity(4);
    for (pis, closed) in path.continuations() {
        if closed {
            // outer
            let mut it = pis.iter().filter(|pi| !pi.is_zero());
            let m = res.len();
            if let Some(pi) = it.next() {
                path_item_offset(&mut res, pi, width);
            } else {
                continue;
            }
            let first = res[m].left_point();
            for pi in it {
                path_item_offset(&mut tmp, pi, width);
                let s = res.last().unwrap().right_point();
                add_join(&mut res, join, pi.left_point(), s, tmp[0].left_point());
                res.extend(tmp.drain(..));
            }
            let s = res.last().unwrap().right_point();
            add_join(&mut res, join, pis[0].left_point(), s, first);
            res.push(PathItem::CloseAndJump);
            // inner
            let mut it = pis.iter().rev().filter(|pi| !pi.is_zero()).map(|pi| pi.flip());
            let m = res.len();
            path_item_offset(&mut res, &it.next().unwrap(), width);
            let first = res[m].left_point();
            for pi in it {
                path_item_offset(&mut tmp, &pi, width);
                let s = res.last().unwrap().right_point();
                add_join(&mut res, join, pi.left_point(), s, tmp[0].left_point());
                res.extend(tmp.drain(..));
            }
            let s = res.last().unwrap().right_point();
            add_join(&mut res, join, pis[0].left_point(), s, first);
            res.push(PathItem::CloseAndJump);
        } else {
            let mut it = pis.iter().filter(|pi| !pi.is_zero());
            let m = res.len();
            if let Some(pi) = it.next() {
                path_item_offset(&mut res, pi, width);
            } else {
                continue;
            }
            let first = res[m].left_point();
            for pi in it {
                path_item_offset(&mut tmp, pi, width);
                let s = res.last().unwrap().right_point();
                add_join(&mut res, join, pi.left_point(), s, tmp[0].left_point());
                res.extend(tmp.drain(..));
            }
            let mut it = pis.iter().rev().filter(|pi| !pi.is_zero()).map(|pi| pi.flip());
            path_item_offset(&mut tmp, &it.next().unwrap(), width);
            let s = res.last().unwrap().right_point();
            add_cap(&mut res, cap, s, tmp[0].left_point());
            res.extend(tmp.drain(..));
            for pi in it {
                path_item_offset(&mut tmp, &pi, width);
                let s = res.last().unwrap().right_point();
                add_join(&mut res, join, pi.left_point(), s, tmp[0].left_point());
                res.extend(tmp.drain(..));
            }
            let s = res.last().unwrap().right_point();
            add_cap(&mut res, cap, s, first);
            res.push(PathItem::CloseAndJump);
        }
    }
    Path(res)
}
pub fn path_outline ( path : & Path , width : f64 , join : & Join , cap : & Cap ) -> Path { assert_ne ! ( width 0.0 ) ; let mut res = Vec :: with_capacity ( path . 0 . len ( ) * 4 ) ; let mut tmp = Vec :: with_capacity ( 4 ) ; for ( pis , closed ) in path . continuations ( ) { if closed { // outer let mut it = pis . iter ( ) . filter ( | pi | ! pi . is_zero ( ) ) ; let m = res . len ( ) ; if let Some ( pi ) = it . next ( ) { path_item_offset ( & mut res , pi , width ) ; } else { continue ; } let first = res [ m ] . left_point ( ) ; for pi in it { path_item_offset ( & mut tmp , pi , width ) ; let s = res . last ( ) . unwrap ( ) . right_point ( ) ; add_join ( & mut res , join , pi . left_point ( ) , s , tmp [ 0 ] . left_point ( ) ) ; res . extend ( tmp . drain ( .. ) ) ; } let s = res . last ( ) . unwrap ( ) . right_point ( ) ; add_join ( & mut res , join , pis [ 0 ] . left_point ( ) , s , first ) ; res . push ( PathItem :: CloseAndJump ) ; // inner let mut it = pis . iter ( ) . rev ( ) . filter ( | pi | ! pi . is_zero ( ) ) . map ( | pi | pi . flip ( ) ) ; let m = res . len ( ) ; path_item_offset ( & mut res , & it . next ( ) . unwrap ( ) , width ) ; let first = res [ m ] . left_point ( ) ; for pi in it { path_item_offset ( & mut tmp , & pi , width ) ; let s = res . last ( ) . unwrap ( ) . right_point ( ) ; add_join ( & mut res , join , pi . left_point ( ) , s , tmp [ 0 ] . left_point ( ) ) ; res . extend ( tmp . drain ( .. ) ) ; } let s = res . last ( ) . unwrap ( ) . right_point ( ) ; add_join ( & mut res , join , pis [ 0 ] . left_point ( ) , s , first ) ; res . push ( PathItem :: CloseAndJump ) ; } else { let mut it = pis . iter ( ) . filter ( | pi | ! pi . is_zero ( ) ) ; let m = res . len ( ) ; if let Some ( pi ) = it . next ( ) { path_item_offset ( & mut res , pi , width ) ; } else { continue ; } let first = res [ m ] . left_point ( ) ; for pi in it { path_item_offset ( & mut tmp , pi , width ) ; let s = res . last ( ) . unwrap ( ) . right_point ( ) ; add_join ( & mut res , join , pi . left_point ( ) , s , tmp [ 0 ] . left_point ( ) ) ; res . extend ( tmp . drain ( .. ) ) ; } let mut it = pis . iter ( ) . rev ( ) . filter ( | pi | ! pi . is_zero ( ) ) . map ( | pi | pi . flip ( ) ) ; path_item_offset ( & mut tmp , & it . next ( ) . unwrap ( ) , width ) ; let s = res . last ( ) . unwrap ( ) . right_point ( ) ; add_cap ( & mut res , cap , s , tmp [ 0 ] . left_point ( ) ) ; res . extend ( tmp . drain ( .. ) ) ; for pi in it { path_item_offset ( & mut tmp , & pi , width ) ; let s = res . last ( ) . unwrap ( ) . right_point ( ) ; add_join ( & mut res , join , pi . left_point ( ) , s , tmp [ 0 ] . left_point ( ) ) ; res . extend ( tmp . drain ( .. ) ) ; } let s = res . last ( ) . unwrap ( ) . right_point ( ) ; add_cap ( & mut res , cap , s , first ) ; res . push ( PathItem :: CloseAndJump ) ; } } Path ( res ) }
Create a path that is outline of given path.
Create a path that is outline of given path .
path
&Path
width
f64
join
&Join
cap
&Cap