Interface ShapeRendererFunc

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("org.javagi.JavaGI")
public interface ShapeRendererFunc
extends FunctionPointer

Functional interface declaration of the ShapeRendererFunc callback.

See Also:

• run(Context, AttrShape, boolean)

Method Summary

Modifier and Type	Method	Description
void	run(org.freedesktop.cairo.Context cr, AttrShape attr, boolean doPath)	Function type for rendering attributes of type AttrType.SHAPE with Pango's Cairo renderer.
default MemorySegment	toCallback(Arena arena)	Creates a native function pointer to the upcall(MemorySegment, MemorySegment, int, MemorySegment) method.
default void	upcall(MemorySegment cr, MemorySegment attr, int doPath, MemorySegment data)	The upcall method is called from native code.

Method Details

run

void run(org.freedesktop.cairo.Context cr,
 AttrShape attr,
 boolean doPath)

Function type for rendering attributes of type AttrType.SHAPE with Pango's Cairo renderer.

Parameters:

cr - a Cairo context with current point set to where the shape should be rendered

attr - the AttrType.SHAPE to render

doPath - whether only the shape path should be appended to current path of cr and no filling/stroking done. This will be set to true when called from pango_cairo_layout_path() and pango_cairo_layout_line_path() rendering functions.

upcall

default void upcall(MemorySegment cr,
 MemorySegment attr,
 int doPath,
 MemorySegment data)

The upcall method is called from native code. The parameters are marshaled and run(Context, AttrShape, boolean) is executed.

toCallback

default MemorySegment toCallback(Arena arena)

Creates a native function pointer to the upcall(MemorySegment, MemorySegment, int, MemorySegment) method.

Specified by:

toCallback in interface FunctionPointer

Parameters:

arena - the arena in which the function pointer is allocated

Returns:

the native function pointer