Top Description Fields Methods
org.lwjgl.util.harfbuzz

public Interface hb_draw_quadratic_to_func_tI

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

Type


void (*invoke) (
    hb_draw_funcs_t *dfuncs,
    void *draw_data,
    hb_draw_state_t *st,
    float control_x,
    float control_y,
    float to_x,
    float to_y,
    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 void
invoke(long
draw functions object
dfuncs, long
the data accompanying the draw functions in font_draw_glyph
draw_data, long
current draw state
st, float
X component of control point
control_x, float
Y component of control point
control_y, float
X component of target point
to_x, float
Y component of target point
to_y, long
user data pointer passed to draw_funcs_set_quadratic_to_func
user_data)

A virtual method for the hb_draw_funcs_t to perform a "quadratic-to" draw operation.

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 void invoke(long dfuncs, long draw_data, long st, float control_x, float control_y, float to_x, float to_y, long user_data)

A virtual method for the hb_draw_funcs_t to perform a "quadratic-to" draw operation.

Parameters
dfuncs:long

draw functions object

draw_data:long

the data accompanying the draw functions in font_draw_glyph

st:long

current draw state

control_x:float

X component of control point

control_y:float

Y component of control point

to_x:float

X component of target point

to_y:float

Y component of target point

user_data:long

user data pointer passed to draw_funcs_set_quadratic_to_func