A BlendMode that uses Porter-Duff coefficients to blend colors.
A custom BlendMode can be created by providing custom coefficients to the PorterDuff constructor:
// Creates a custom blend mode that always returns zero.
final customBlendMode = PorterDuff(PorterDuff.zero, PorterDuff.one);
- Implemented types
Constructors
- PorterDuff(double _src(double, double), double _dst(double, double))
-
Creates a blend mode with Porter-Duff coefficients.
const
Properties
- hashCode → int
-
The hash code for this object.
no setterinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
getBlend<
S, T> (PixelFormat< S, void> srcFormat, PixelFormat<T, void> dstFormat) → T Function(S src, T dst) -
Returns a function that blends two pixels together.
override
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited
Static Methods
-
dst(
double srcAlpha, double dstAlpha) → double -
Returns the destination alpha channel (
dstAlpha). -
one(
double srcAlpha, double dstAlpha) → double -
Always returns one (
1.0). -
oneMinusDst(
double srcAlpha, double dstAlpha) → double -
Returns one minus the destination alpha channel (
1 - dstAlpha). -
oneMinusSrc(
double srcAlpha, double dstAlpha) → double -
Returns one minus the source alpha channel (
1 - srcAlpha). -
src(
double srcAlpha, double dstAlpha) → double -
Returns the source alpha channel (
srcAlpha). -
zero(
double srcAlpha, double dstAlpha) → double -
Always returns zero (
0.0).