Package org.freedesktop.harfbuzz

Interface FontGetGlyphExtentsFunc

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 FontGetGlyphExtentsFunc
extends FunctionPointer

Functional interface declaration of the FontGetGlyphExtentsFunc callback.

See Also:

• run(org.freedesktop.harfbuzz.Font, java.lang.foreign.MemorySegment, org.freedesktop.harfbuzz.Codepoint, org.freedesktop.harfbuzz.GlyphExtents)

Method Summary

Modifier and Type	Method	Description
Bool	run(Font font, @Nullable MemorySegment fontData, Codepoint glyph, GlyphExtents extents)	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(java.lang.foreign.MemorySegment, java.lang.foreign.MemorySegment, int, java.lang.foreign.MemorySegment, java.lang.foreign.MemorySegment) method.
default int	upcall(MemorySegment font, MemorySegment fontData, int glyph, MemorySegment extents, MemorySegment userData)	The upcall method is called from native code.

Method Details

run

Bool run(Font font,
 @Nullable MemorySegment fontData,
 Codepoint glyph,
 GlyphExtents extents)

A virtual method for the hb_font_funcs_t of an hb_font_t object.

This method should retrieve the extents for a specified glyph. Extents must be returned in an hb_glyph_extents output parameter.

upcall

default int upcall(MemorySegment font,
 MemorySegment fontData,
 int glyph,
 MemorySegment extents,
 MemorySegment userData)

The upcall method is called from native code. The parameters are marshaled and run(org.freedesktop.harfbuzz.Font, java.lang.foreign.MemorySegment, org.freedesktop.harfbuzz.Codepoint, org.freedesktop.harfbuzz.GlyphExtents) is executed.

toCallback

default MemorySegment toCallback(Arena arena)

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

Specified by:

toCallback in interface FunctionPointer

Parameters:

arena - the arena in which the function pointer is allocated

Returns:

the native function pointer