Top Description Fields Methods
org.lwjgl.util.harfbuzz

public Interface hb_unicode_compose_func_tI

extends CallbackI
Known Direct Implementers
org.lwjgl.util.harfbuzz.hb_unicode_compose_func_t
Annotations
@FunctionalInterface
@NativeType:hb_unicode_compose_func_t
Imports
org.lwjgl.system.*, org.lwjgl.system.libffi.*

Type


hb_bool_t (*invoke) (
    hb_unicode_funcs_t *ufuncs,
    hb_codepoint_t a,
    hb_codepoint_t b,
    hb_codepoint_t *ab,
    void *user_data
)

Field Summary

Modifier and TypeField and Description
public static final FFICIF
CIF

Method Summary

Modifier and TypeMethod and Description
public default void
callback(long
a pointer to the memory used for the function's return value.

If the function is declared as returning void, then this value is garbage and should not be used.

Otherwise, the callback must fill the object to which this points, following the same special promotion behavior as LibFFI#ffi_call. That is, in most cases, ret points to an object of exactly the size of the type specified when CIF was constructed. However, integral types narrower than the system register size are widened. In these cases your program may assume that ret points to an ffi_arg object.

ret, long
a vector of pointers to memory holding the arguments to the function
args)

Implements org.lwjgl.system.CallbackI.callback.

The Java method that will be called from native code when the native callback function is invoked.
public default FFICIF
getCallInterface()

Implements org.lwjgl.system.CallbackI.getCallInterface.

Returns the libffi Call Interface for this callback function.
public int
invoke(long
a Unicode-functions structure
ufuncs, int
the first code point to compose
a, int
the second code point to compose
b, long
the composed code point
ab, long
user data pointer passed by the caller
user_data)

A virtual method for the hb_unicode_funcs_t structure.

Inherited from org.lwjgl.system.CallbackI:
address

Field Detail

CIFback to summary
public static final FFICIF CIF

Method Detail

callbackback to summary
public default void callback(long ret, long args)

Implements org.lwjgl.system.CallbackI.callback.

Doc from org.lwjgl.system.CallbackI.callback.

The Java method that will be called from native code when the native callback function is invoked.

Parameters
ret:long

a pointer to the memory used for the function's return value.

If the function is declared as returning void, then this value is garbage and should not be used.

Otherwise, the callback must fill the object to which this points, following the same special promotion behavior as LibFFI#ffi_call. That is, in most cases, ret points to an object of exactly the size of the type specified when CIF was constructed. However, integral types narrower than the system register size are widened. In these cases your program may assume that ret points to an ffi_arg object.

args:long

a vector of pointers to memory holding the arguments to the function

Annotations
@Override
getCallInterfaceback to summary
public default FFICIF getCallInterface()

Implements org.lwjgl.system.CallbackI.getCallInterface.

Doc from org.lwjgl.system.CallbackI.getCallInterface.

Returns the libffi Call Interface for this callback function. [INTERNAL API]

Returns:FFICIF

the CIF structure for this callback function

Annotations
@Override
invokeback to summary
public int invoke(long ufuncs, int a, int b, long ab, long user_data)

A virtual method for the hb_unicode_funcs_t structure.

This method should compose a sequence of two input Unicode code points by canonical equivalence, returning the composed code point in a hb_codepoint_t output parameter (if successful). The method must return an hb_bool_t indicating the success of the composition.

Return value: true is a,b composed, false otherwise

Parameters
ufuncs:long

a Unicode-functions structure

a:int

the first code point to compose

b:int

the second code point to compose

ab:long

the composed code point

user_data:long

user data pointer passed by the caller

Annotations
@NativeType:hb_bool_t