Interface FontGetGlyphAdvancesFunc

All Superinterfaces:

FunctionPointer

All Known Subinterfaces:

FontGetGlyphHAdvancesFunc, FontGetGlyphVAdvancesFunc

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 FontGetGlyphAdvancesFunc
extends FunctionPointer

Functional interface declaration of the FontGetGlyphAdvancesFunc callback.

See Also:

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

Method Summary

Modifier and Type	Method	Description
void	run(Font font, @Nullable MemorySegment fontData, int count, MemorySegment firstGlyph, int glyphStride, Position firstAdvance, int advanceStride)	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, MemorySegment, int, MemorySegment, int, MemorySegment) method.
default void	upcall(MemorySegment font, MemorySegment fontData, int count, MemorySegment firstGlyph, int glyphStride, MemorySegment firstAdvance, int advanceStride, MemorySegment userData)	The upcall method is called from native code.

Method Details

run

void run(Font font,
 @Nullable MemorySegment fontData,
 int count,
 MemorySegment firstGlyph,
 int glyphStride,
 Position firstAdvance,
 int advanceStride)

A virtual method for the hb_font_funcs_t of an hb_font_t object.

This method should retrieve the advances for a sequence of glyphs.

Parameters:

font - hb_font_t to work upon

fontData - font user data pointer

count - The number of glyph IDs in the sequence queried

firstGlyph - The first glyph ID to query

glyphStride - The stride between successive glyph IDs

firstAdvance - The first advance retrieved

advanceStride - The stride between successive advances

upcall

default void upcall(MemorySegment font,
 MemorySegment fontData,
 int count,
 MemorySegment firstGlyph,
 int glyphStride,
 MemorySegment firstAdvance,
 int advanceStride,
 MemorySegment userData)

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

toCallback

default MemorySegment toCallback(Arena arena)

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