Struct Evaluator

struct Evaluator<'a, S> {

    cff_data: &'a [u8],
    charstrings: Index<'a>,
    global_subrs: Index<'a>,
    subrs: Option<Index<'a>>,
    blend_state: Option<BlendState<'a>>,
    sink: &'a mut S,
    is_open: bool,
    have_read_width: bool,
    stem_count: usize,
    x: Fixed,
    y: Fixed,
    stack: Stack,
    stack_ix: usize,
}

Transient state for evaluating a charstring and handling recursive subroutine calls.

Fields

cff_data: &'a [u8]

charstrings: Index<'a>

global_subrs: Index<'a>

subrs: Option<Index<'a>>

blend_state: Option<BlendState<'a>>

sink: &'a mut S

is_open: bool

have_read_width: bool

stem_count: usize

x: Fixed

y: Fixed

stack: Stack

stack_ix: usize

Implementations

impl<'a, S> Evaluator<'a, S>

where S: CommandSink,

fn new( cff_data: &'a [u8], charstrings: Index<'a>, global_subrs: Index<'a>, subrs: Option<Index<'a>>, blend_state: Option<BlendState<'a>>, sink: &'a mut S, ) -> Self

fn evaluate( &mut self, charstring_data: &[u8], nesting_depth: u32, ) -> Result<(), Error>

fn evaluate_operator( &mut self, operator: Operator, cursor: &mut Cursor<'_>, nesting_depth: u32, ) -> Result<bool, Error>

Evaluates a single charstring operator.

Returns Ok(true) if evaluation should continue.

fn handle_seac(&mut self, nesting_depth: u32) -> Result<(), Error>

See endchar in Appendix C at https://adobe-type-tools.github.io/font-tech-notes/pdfs/5177.Type2.pdf#page=35

fn coords_remaining(&self) -> usize

fn emit_curves<const N: usize>( &mut self, modes: [PointMode; N], ) -> Result<(), Error>

fn reset_stack(&mut self)