Enum BlendMethod 

#[non_exhaustive]
#[repr(u8)]
pub enum BlendMethod {
    Normal = 0,
    Multiply = 1,
    Screen = 2,
    Overlay = 3,
    Darken = 4,
    Lighten = 5,
    ColorDodge = 6,
    ColorBurn = 7,
    HardLight = 8,
    SoftLight = 9,
    Difference = 10,
    Exclusion = 11,
    Hue = 12,
    Saturation = 13,
    Color = 14,
    Luminosity = 15,
    Add = 16,
}

Blending method for compositing paint objects.

Covers thorvg’s user-facing blend modes (Tvg_Blend_Method NORMAL..=ADD). The C enum’s TVG_BLEND_METHOD_COMPOSITION (= 255) is deliberately omitted: it is an internal value the engine uses for intermediate composition, not a mode callers select. Blend is write-only in the C API (there is no tvg_paint_get_blend_method), so the engine never hands a value back that would need mapping here — hence this enum has only to_raw and no from_raw.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Normal = 0

Source is drawn over the destination (the default, no blending).

Multiply = 1

Multiplies source and destination — always darkens.

Screen = 2

Inverse-multiplies — always lightens.

Overlay = 3

Multiply in dark areas, Screen in light areas.

Darken = 4

Keeps the darker of source and destination per channel.

Lighten = 5

Keeps the lighter of source and destination per channel.

ColorDodge = 6

Brightens the destination to reflect the source.

ColorBurn = 7

Darkens the destination to reflect the source.

HardLight = 8

Overlay with source and destination swapped.

SoftLight = 9

A softer variant of HardLight.

Difference = 10

Absolute difference of source and destination per channel.

Exclusion = 11

Like Difference but with lower contrast.

Hue = 12

Hue of the source with destination saturation and luminosity.

Saturation = 13

Saturation of the source with destination hue and luminosity.

Color = 14

Hue and saturation of the source with destination luminosity.

Luminosity = 15

Luminosity of the source with destination hue and saturation.

Add = 16

Additive blending — sums source and destination per channel.

Trait Implementations

impl Clone for BlendMethod

fn clone(&self) -> BlendMethod

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for BlendMethod

impl Debug for BlendMethod

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

Formats the value using the given formatter.

impl Eq for BlendMethod

impl Hash for BlendMethod

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 BlendMethod

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for BlendMethod