Interface FontGetGlyphKerningFunc

All Superinterfaces:

FunctionPointer

All Known Subinterfaces:

FontGetGlyphHKerningFunc, FontGetGlyphVKerningFunc

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 FontGetGlyphKerningFunc
extends FunctionPointer

Functional interface declaration of the FontGetGlyphKerningFunc callback.

See Also:

• run(Font, MemorySegment, Codepoint, Codepoint)

Method Summary

Modifier and Type	Method	Description
Position	run(Font font, @Nullable MemorySegment fontData, Codepoint firstGlyph, Codepoint secondGlyph)	This method should retrieve the kerning-adjustment value for a glyph-pair in the specified font, for horizontal text segments.
default MemorySegment	toCallback(Arena arena)	Creates a native function pointer to the upcall(MemorySegment, MemorySegment, int, int, MemorySegment) method.
default int	upcall(MemorySegment font, MemorySegment fontData, int firstGlyph, int secondGlyph, MemorySegment userData)	The upcall method is called from native code.

Method Details

run

Position run(Font font,
 @Nullable MemorySegment fontData,
 Codepoint firstGlyph,
 Codepoint secondGlyph)

This method should retrieve the kerning-adjustment value for a glyph-pair in the specified font, for horizontal text segments.

Parameters:

font - hb_font_t to work upon

fontData - font user data pointer

firstGlyph - The glyph ID of the first glyph in the glyph pair

secondGlyph - The glyph ID of the second glyph in the glyph pair

upcall

default int upcall(MemorySegment font,
 MemorySegment fontData,
 int firstGlyph,
 int secondGlyph,
 MemorySegment userData)

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

toCallback

default MemorySegment toCallback(Arena arena)

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