Enum printpdf::types::plugins::graphics::extgstate::HalftoneType

pub enum HalftoneType {
    Type1(f64, f64, SpotFunction),
    Type5(Vec<HalftoneType>),
    Type6(Vec<u8>),
    Type10(Vec<u8>),
    Type16(Vec<u16>),
}

In PDF 1.2, the graphics state includes a current halftone parameter, which determines the halftoning process to be used by the painting operators. It may be defined by either a dictionary or a stream, depending on the type of halftone; the term halftone dictionary is used generically throughout this section to refer to either a dictionary object or the dictionary portion of a stream object. (The halftones that are defined by streams are specifically identified as such in the descriptions of particular halftone types; unless otherwise stated, they are understood to be defined by simple dictionaries instead.) Deserialized into Integer: 1, 5, 6, 10 or 16

Variants

Type1(f64, f64, SpotFunction)

1: Defines a single halftone screen by a frequency, angle, and spot function

Type5(Vec<HalftoneType>)

5: Defines an arbitrary number of halftone screens, one for each colorant or color component (including both primary and spot colorants). The keys in this dictionary are names of colorants; the values are halftone dictionaries of other types, each defining the halftone screen for a single colorant.

Type6(Vec<u8>)

6: Defines a single halftone screen by a threshold array containing 8-bit sample values.

Type10(Vec<u8>)

10: Defines a single halftone screen by a threshold array containing 8-bit sample values, representing a halftone cell that may have a nonzero screen angle.

Type16(Vec<u16>)

16: (PDF 1.3) Defines a single halftone screen by a threshold array containing 16-bit sample values, representing a halftone cell that may have a nonzero screen angle.

Implementations

impl HalftoneType

pub fn get_type(&self) -> i64

Get the identifer integer of the HalftoneType

pub fn into_obj(self) -> Vec<Object>

Trait Implementations

impl Clone for HalftoneType

fn clone(&self) -> HalftoneType

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for HalftoneType

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

Formats the value using the given formatter.

impl PartialEq<HalftoneType> for HalftoneType

fn eq(&self, other: &HalftoneType) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &HalftoneType) -> bool

This method tests for !=.

impl StructuralPartialEq for HalftoneType