Enum CompOp 

#[repr(u8)]
pub enum CompOp {
    SrcOver = 0,
    SrcCopy = 1,
    SrcIn = 2,
    SrcOut = 3,
    SrcAtop = 4,
    DstOver = 5,
    DstCopy = 6,
    DstIn = 7,
    DstOut = 8,
    DstAtop = 9,
    Xor = 10,
    Clear = 11,
    Plus = 12,
    Minus = 13,
    Modulate = 14,
    Multiply = 15,
    Screen = 16,
    Overlay = 17,
    Darken = 18,
    Lighten = 19,
    ColorDodge = 20,
    ColorBurn = 21,
    LinearBurn = 22,
    LinearLight = 23,
    PinLight = 24,
    HardLight = 25,
    SoftLight = 26,
    Difference = 27,
    Exclusion = 28,
}

合成オペレーション。Blend2D の BLCompOp と値を合わせている。

Variants

SrcOver = 0

source を destination の上に Porter-Duff SrcOver で合成する。 out = src + dst * (1 - srcA)

SrcCopy = 1

destination を source で完全に置き換える。 out = src

SrcIn = 2

out = src * dstA

SrcOut = 3

out = src * (1 - dstA)

SrcAtop = 4

out = src * dstA + dst * (1 - srcA)

DstOver = 5

out = dst + src * (1 - dstA)

DstCopy = 6

out = dst (何もしない)

DstIn = 7

out = dst * srcA

DstOut = 8

out = dst * (1 - srcA)

DstAtop = 9

out = dst * srcA + src * (1 - dstA)

Xor = 10

out = src * (1 - dstA) + dst * (1 - srcA)

Clear = 11

out = 0

Plus = 12

out = min(src + dst, 1)

Minus = 13

out = max(dst - src, 0), alpha = SrcOver

Modulate = 14

out_c = src_c * dst_c / 255 (チャネル乗算、alpha も同様)

Multiply = 15

Multiply ブレンド。blend = srcdst, out = blend + src(1-dstA) + dst*(1-srcA)

Screen = 16

Screen ブレンド。out = src + dst - src*dst

Overlay = 17

Overlay ブレンド。条件分岐 (2*Dc < Da)

Darken = 18

Darken ブレンド。blend = min(srcdstA, dstsrcA)

Lighten = 19

Lighten ブレンド。blend = max(srcdstA, dstsrcA)

ColorDodge = 20

ColorDodge ブレンド。除算あり

ColorBurn = 21

ColorBurn ブレンド。除算あり

LinearBurn = 22

LinearBurn ブレンド。飽和減算

LinearLight = 23

LinearLight ブレンド。clamp + 条件

PinLight = 24

PinLight ブレンド。条件分岐 + min/max

HardLight = 25

HardLight ブレンド。条件分岐 (2*Sc < Sa)

SoftLight = 26

SoftLight ブレンド。除算 + sqrt + 条件分岐

Difference = 27

Difference ブレンド。abs 差分

Exclusion = 28

Exclusion ブレンド。単純な算術

Trait Implementations

impl Clone for CompOp

fn clone(&self) -> CompOp

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for CompOp

impl Debug for CompOp

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

Formats the value using the given formatter.

impl Default for CompOp

fn default() -> CompOp

Returns the “default value” for a type.

impl Eq for CompOp

impl Hash for CompOp

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 CompOp

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for CompOp