Package org.gnome.gsk

Interface PathForeachFunc

All Superinterfaces:

FunctionPointer

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
@Generated("io.github.jwharm.JavaGI")
public interface PathForeachFunc
extends FunctionPointer

Functional interface declaration of the PathForeachFunc callback.

See Also:

• run(org.gnome.gsk.PathOperation, org.gnome.graphene.Point, long, float)

Method Summary

Modifier and Type	Method	Description
boolean	run(PathOperation op, Point pts, long nPts, float weight)	Prototype of the callback to iterate through the operations of a path.
default MemorySegment	toCallback(Arena arena)	Creates a native function pointer to the upcall(int, java.lang.foreign.MemorySegment, long, float, java.lang.foreign.MemorySegment) method.
default int	upcall(int op, MemorySegment pts, long nPts, float weight, MemorySegment userData)	The upcall method is called from native code.

Method Details

run

boolean run(PathOperation op,
 Point pts,
 long nPts,
 float weight)

Prototype of the callback to iterate through the operations of a path.

For each operation, the callback is given the op itself, the points that the operation is applied to in pts, and a weight for conic curves. The nPts argument is somewhat redundant, since the number of points can be inferred from the operation.

Each contour of the path starts with a GSKPATHMOVE operation. Closed contours end with a GSKPATHCLOSE operation.

upcall

default int upcall(int op,
 MemorySegment pts,
 long nPts,
 float weight,
 MemorySegment userData)

The upcall method is called from native code. The parameters are marshaled and run(org.gnome.gsk.PathOperation, org.gnome.graphene.Point, long, float) is executed.

toCallback

default MemorySegment toCallback(Arena arena)

Creates a native function pointer to the upcall(int, java.lang.foreign.MemorySegment, long, float, java.lang.foreign.MemorySegment) method.

Specified by:

toCallback in interface FunctionPointer

Parameters:

arena - the function pointer will be allocated in this arena

Returns:

the native function pointer