Enum BlendMode 

pub enum BlendMode {
    Normal,
    Compatible,
    Multiply,
    Screen,
    Overlay,
    Darken,
    Lighten,
    ColorDodge,
    ColorBurn,
    HardLight,
    SoftLight,
    Difference,
    Exclusion,
    Hue,
    Saturation,
    Color,
    Luminosity,
}

A separable blend mode (ISO 32000-1 table 136).

An unrecognised /BM name is Normal, not an error.

Variants

Normal

Paint the source over the backdrop.

Compatible

A synonym for Self::Normal kept for round-tripping.

Multiply

Multiply the two.

Screen

Multiply the complements.

Overlay

Multiply or screen depending on the backdrop.

Darken

Take the darker.

Lighten

Take the lighter.

ColorDodge

Brighten the backdrop to reflect the source.

ColorBurn

Darken the backdrop to reflect the source.

HardLight

Multiply or screen depending on the source.

SoftLight

Darken or lighten depending on the source.

Difference

The absolute difference.

Exclusion

A lower-contrast difference.

Hue

The source’s hue with the backdrop’s saturation and luminosity.

Saturation

The source’s saturation.

Color

The source’s hue and saturation.

Luminosity

The source’s luminosity.

Implementations

impl BlendMode

pub fn from_name(name: &[u8]) -> Self

The mode a /BM name denotes, defaulting to Self::Normal.

pub fn needs_backdrop(self) -> bool

Whether compositing in this mode needs the backdrop.

PDFium marks a holder as needing background alpha for any mode past Multiply, which is what this reproduces.

Trait Implementations

impl Clone for BlendMode

fn clone(&self) -> BlendMode

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for BlendMode

impl Debug for BlendMode

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

Formats the value using the given formatter.

impl Default for BlendMode

fn default() -> BlendMode

Returns the “default value” for a type.

impl Eq for BlendMode

impl Hash for BlendMode

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for BlendMode

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for BlendMode