Struct RetainedGraphicsState

pub struct RetainedGraphicsState {

    pub auto_flip: bool,
    pub control_value_cutin: F26Dot6,
    pub delta_base: u16,
    pub delta_shift: u16,
    pub instruct_control: u8,
    pub min_distance: F26Dot6,
    pub scan_control: bool,
    pub scan_type: i32,
    pub single_width_cutin: F26Dot6,
    pub single_width: F26Dot6,
    pub target: Target,
    pub scale: i32,
    pub ppem: i32,
    pub is_rotated: bool,
    pub is_stretched: bool,
}

The persistent graphics state.

Some of the graphics state is set by the control value program and persists between runs of the interpreter. This struct captures that state.

See https://developer.apple.com/fonts/TrueType-Reference-Manual/RM04/Chap4.html

Fields

auto_flip: bool

Controls whether the sign of control value table entries will be changed to match the sign of the actual distance measurement with which it is compared.

See https://developer.apple.com/fonts/TrueType-Reference-Manual/RM04/Chap4.html#auto%20flip

control_value_cutin: F26Dot6

Limits the regularizing effects of control value table entries to cases where the difference between the table value and the measurement taken from the original outline is sufficiently small.

See https://developer.apple.com/fonts/TrueType-Reference-Manual/RM04/Chap4.html#control_value_cut-in

delta_base: u16

Establishes the base value used to calculate the range of point sizes to which a given DELTAC[] or DELTAP[] instruction will apply.

See https://developer.apple.com/fonts/TrueType-Reference-Manual/RM04/Chap4.html#delta%20base

delta_shift: u16

Determines the range of movement and smallest magnitude of movement (the step) in a DELTAC[] or DELTAP[] instruction.

See https://developer.apple.com/fonts/TrueType-Reference-Manual/RM04/Chap4.html#delta%20shift

instruct_control: u8

Makes it possible to turn off instructions under some circumstances. When set to TRUE, no instructions will be executed

See https://developer.apple.com/fonts/TrueType-Reference-Manual/RM04/Chap4.html#instruct%20control

min_distance: F26Dot6

Establishes the smallest possible value to which a distance will be rounded.

See https://developer.apple.com/fonts/TrueType-Reference-Manual/RM04/Chap4.html#minimum%20distance

scan_control: bool

Determines whether the interpreter will activate dropout control for the current glyph.

See https://developer.apple.com/fonts/TrueType-Reference-Manual/RM04/Chap4.html#scan%20control

scan_type: i32

Type associated with scan_control.

single_width_cutin: F26Dot6

The distance difference below which the interpreter will replace a CVT distance or an actual distance in favor of the single width value.

See https://developer.apple.com/fonts/TrueType-Reference-Manual/RM04/Chap4.html#single_width_cut_in

single_width: F26Dot6

The value used in place of the control value table distance or the actual distance value when the difference between that distance and the single width value is less than the single width cut-in.

See https://developer.apple.com/fonts/TrueType-Reference-Manual/RM04/Chap4.html#single_width_value

target: Target

The user requested hinting target.

scale: i32

The scale factor for the current instance. Conversion from font units to 26.6 for current ppem.

ppem: i32

The nominal pixels per em value for the current instance.

is_rotated: bool

True if a rotation is being applied.

is_stretched: bool

True if a non-uniform scale is being applied.

Implementations

impl RetainedGraphicsState

pub fn new(scale: i32, ppem: i32, target: Target) -> Self

Trait Implementations

impl Clone for RetainedGraphicsState

fn clone(&self) -> RetainedGraphicsState

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RetainedGraphicsState

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

Formats the value using the given formatter.

impl Default for RetainedGraphicsState

fn default() -> Self

Returns the “default value” for a type.

impl Copy for RetainedGraphicsState