Interface FontGetGlyphOriginsFunc

All Superinterfaces:

FunctionPointer

All Known Subinterfaces:

FontGetGlyphHOriginsFunc, FontGetGlyphVOriginsFunc

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 FontGetGlyphOriginsFunc
extends FunctionPointer

Functional interface declaration of the FontGetGlyphOriginsFunc callback.

See Also:

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

Method Summary

Modifier and Type	Method	Description
Bool	run(Font font, @Nullable MemorySegment fontData, int count, MemorySegment firstGlyph, int glyphStride, Position firstX, int xStride, Position firstY, int yStride)	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, int, MemorySegment) method.
default int	upcall(MemorySegment font, MemorySegment fontData, int count, MemorySegment firstGlyph, int glyphStride, MemorySegment firstX, int xStride, MemorySegment firstY, int yStride, MemorySegment userData)	The upcall method is called from native code.

Method Details

run

Bool run(Font font,
 @Nullable MemorySegment fontData,
 int count,
 MemorySegment firstGlyph,
 int glyphStride,
 Position firstX,
 int xStride,
 Position firstY,
 int yStride)

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) of the origin for each requested glyph. Each coordinate value must be returned in an hb_position_t in the two output parameters.

Parameters:

font - hb_font_t to work upon

fontData - font user data pointer

count - number of glyphs to query

firstGlyph - The first glyph ID to query

glyphStride - The stride between successive glyph IDs

firstX - The first origin X coordinate retrieved

xStride - The stride between successive origin X coordinates

firstY - The first origin Y coordinate retrieved

yStride - The stride between successive origin Y coordinates

Returns:

true if data found, false otherwise

Since:

11.3.0

upcall

default int upcall(MemorySegment font,
 MemorySegment fontData,
 int count,
 MemorySegment firstGlyph,
 int glyphStride,
 MemorySegment firstX,
 int xStride,
 MemorySegment firstY,
 int yStride,
 MemorySegment userData)

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