Interface FontGetGlyphContourPointFunc

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 FontGetGlyphContourPointFunc
extends FunctionPointer

Functional interface declaration of the FontGetGlyphContourPointFunc callback.

See Also:

• run(Font, MemorySegment, Codepoint, int, Position, Position)

Method Summary

Modifier and Type	Method	Description
Bool	run(Font font, @Nullable MemorySegment fontData, Codepoint glyph, int pointIndex, Position x, Position y)	A virtual method for the hb_font_funcs_t of an hb_font_t object.
default MemorySegment	toCallback(Arena arena)	Creates a native function pointer to the upcall(MemorySegment, MemorySegment, int, int, MemorySegment, MemorySegment, MemorySegment) method.
default int	upcall(MemorySegment font, MemorySegment fontData, int glyph, int pointIndex, MemorySegment x, MemorySegment y, MemorySegment userData)	The upcall method is called from native code.

Method Details

run

Bool run(Font font,
 @Nullable MemorySegment fontData,
 Codepoint glyph,
 int pointIndex,
 Position x,
 Position y)

A virtual method for the hb_font_funcs_t of an hb_font_t object.

This method should retrieve the (X,Y) coordinates (in scaled units) for a specified contour point in a glyph. Each coordinate must be returned as an hb_position_t output parameter.

Parameters:

font - hb_font_t to work upon

fontData - font user data pointer

glyph - The glyph ID to query

pointIndex - The contour-point index to query

x - The X value retrieved for the contour point

y - The Y value retrieved for the contour point

Returns:

true if data found, false otherwise

upcall

default int upcall(MemorySegment font,
 MemorySegment fontData,
 int glyph,
 int pointIndex,
 MemorySegment x,
 MemorySegment y,
 MemorySegment userData)

The upcall method is called from native code. The parameters are marshaled and run(Font, MemorySegment, Codepoint, int, Position, Position) is executed.

toCallback

default MemorySegment toCallback(Arena arena)

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

Specified by:

toCallback in interface FunctionPointer

Parameters:

arena - the arena in which the function pointer is allocated

Returns:

the native function pointer