sugarloaf 0.2.27

Sugarloaf is Rio rendering engine, designed to be multiplatform. It is based on WebGPU, Rust library for Desktops and WebAssembly for Web (JavaScript). This project is created and maintained for Rio terminal purposes but feel free to use it.
Documentation 
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// font_introspector was retired from https://github.com/dfrg/swash
// which is licensed under MIT license

/// Macro for consistent implementation of font resource iterators.
macro_rules! impl_iter {
    ($name:ident, $item:ident) => {
        impl<'a> Iterator for $name<'a> {
            type Item = $item<'a>;

            fn size_hint(&self) -> (usize, Option<usize>) {
                let remaining = self.len - self.pos;
                (remaining, Some(remaining))
            }

            fn nth(&mut self, n: usize) -> Option<Self::Item> {
                let pos = self.pos.checked_add(n)?;
                if pos >= self.len {
                    self.pos = self.len;
                    None
                } else {
                    self.pos = pos + 1;
                    self.get(pos)
                }
            }

            fn next(&mut self) -> Option<Self::Item> {
                if self.pos >= self.len {
                    None
                } else {
                    let pos = self.pos;
                    self.pos += 1;
                    self.get(pos)
                }
            }
        }

        impl<'a> ExactSizeIterator for $name<'a> {
            fn len(&self) -> usize {
                self.len - self.pos
            }
        }
    };
}