public class Offset extends Effect
Effect.AccelType
Modifier and Type | Field and Description |
---|---|
private int |
xoff |
private int |
yoff |
DefaultInput
Constructor and Description |
---|
Offset(int xoff,
int yoff,
Effect input)
Constructs a new
Offset effect with the given x/y
adjustment values. |
Modifier and Type | Method and Description |
---|---|
ImageData |
filter(FilterContext fctx,
BaseTransform transform,
Rectangle outputClip,
java.lang.Object renderHelper,
Effect defaultInput)
Applies this filter effect to the series of images represented by
the input
Effect s and/or the given defaultInput
viewed under the given transform . |
Effect.AccelType |
getAccelType(FilterContext fctx)
Returns one of the
AccelType values, indicating
whether this Effect is accelerated in hardware for the
given FilterContext . |
BaseBounds |
getBounds(BaseTransform transform,
Effect defaultInput)
Returns the bounding box that will be affected by this filter
operation when viewed under the specified
transform ,
given its list of input Effect s and the specified
defaultInput effect. |
DirtyRegionContainer |
getDirtyRegions(Effect defaultInput,
DirtyRegionPool regionPool)
Returns the dirty region container containing dirty regions affected
by this filter operation.
|
Effect |
getInput()
Returns the input for this
Effect . |
(package private) static BaseTransform |
getOffsetTransform(BaseTransform transform,
double xoff,
double yoff) |
int |
getX()
Returns the offset in the x direction, in pixels.
|
int |
getY()
Returns the offset in the y direction, in pixels.
|
boolean |
reducesOpaquePixels()
Whether an opacity for any pixel is different (lower)
than the corresponding pixel in the default input.
|
void |
setInput(Effect input)
Sets the input for this
Effect to a specific
Effect or to the default input if input is
null . |
void |
setX(int xoff)
Sets the offset in the x direction, in pixels.
|
void |
setY(int yoff)
Sets the offset in the y direction, in pixels.
|
Point2D |
transform(Point2D p,
Effect defaultInput)
Transform the specified point
p from the coordinate space
of the primary content input to the coordinate space of the effect
output. |
Point2D |
untransform(Point2D p,
Effect defaultInput)
Transform the specified point
p from the coordinate space
of the output of the effect into the coordinate space of the
primary content input. |
combineBounds, combineBounds, createCompatibleImage, ensureTransform, getCompatibleImage, getDefaultedInput, getDefaultedInput, getInputs, getNumInputs, getResultBounds, getState, releaseCompatibleImage, setInput, transformBounds
public Offset(int xoff, int yoff, Effect input)
Offset
effect with the given x/y
adjustment values.xoff
- the offset in the x direction, in pixelsyoff
- the offset in the y direction, in pixelsinput
- the single input Effect
public final Effect getInput()
Effect
.Effect
public void setInput(Effect input)
Effect
to a specific
Effect
or to the default input if input
is
null
.input
- the input for this Effect
public int getX()
public void setX(int xoff)
Min: Integer.MIN_VALUE Max: Integer.MAX_VALUE Default: 0 Identity: 0
xoff
- the offset in the x direction, in pixelspublic int getY()
public void setY(int yoff)
Min: Integer.MIN_VALUE Max: Integer.MAX_VALUE Default: 0 Identity: 0
yoff
- the offset in the y direction, in pixelsstatic BaseTransform getOffsetTransform(BaseTransform transform, double xoff, double yoff)
public BaseBounds getBounds(BaseTransform transform, Effect defaultInput)
Effect
transform
,
given its list of input Effect
s and the specified
defaultInput
effect.
Note that the returned bounds can be smaller or larger than one
or more of the inputs.public ImageData filter(FilterContext fctx, BaseTransform transform, Rectangle outputClip, java.lang.Object renderHelper, Effect defaultInput)
Effect
Effect
s and/or the given defaultInput
viewed under the given transform
.
The filter does not need to create pixel data for any pixels that
fall outside of the destination device-space (pixel) bounds specified
by the outputClip
Rectangle
.
The filter might be able to use the renderHelper
object to
render the results directly on its own if the object is not null and
implements an interface, such as ImageHelper
, that the filter
recognizes.
If the effect renders itself then it will return a null
for
the ImageData
result.
Note that the ImageData
object returned by this method must be
validated prior to use with
ImageData.validate(com.sun.scenario.effect.FilterContext)
method.
boolean valid; do { ImageData res = filter(fctx, transform, clip, renderer, defaultInput); if (res == null) { break; } if (valid = res.validate(fctx)) { // Render res.getImage() to the appropriate destination // or use it as an input to another chain of effects. } res.unref(); } while (!valid);
filter
in class Effect
fctx
- the FilterContext
that determines the
environment (e.g. the graphics device or code path) on which
the filter operation will be performedtransform
- an optional transform under which the filter and
its inputs will be viewedoutputClip
- the device space (pixel) bounds of the output
image or window or clip into which the result of the Effect will
be rendered, or null if the output dimensions are not known.renderHelper
- an object which might be used to render
the results of the effect directly.defaultInput
- the default input Effect
to be used in
all cases where a filter has a null input.ImageData
holding the result of this filter
operation or null
if the filter had no output or used the
renderHelper
to render its results directly.public Point2D transform(Point2D p, Effect defaultInput)
Effect
p
from the coordinate space
of the primary content input to the coordinate space of the effect
output.
In essence, this method asks the question "Which output coordinate
is most affected by the data at the specified coordinate in the
primary source input?"
The definition of which input represents the primary content input
and how the coordinate space of that input compares to the coordinate
space of the result varies from effect to effect.
Note that some effects may have a reasonable definition of how to
map source coordinates to destination coordinates, but not the
reverse.
In particular, effects which map source coordinates discontiguously
into the result may have several output coordinates that are affected
by a given input coordinate and may choose to return one of many
equally valid answers, or an undefined result such as NaN
,
or some other anomalous value.
Most effects perform simple transformations of the color of each
pixel and so represent an identity transform and return the point
unchanged.
public Point2D untransform(Point2D p, Effect defaultInput)
Effect
p
from the coordinate space
of the output of the effect into the coordinate space of the
primary content input.
In essence, this method asks the question "Which source coordinate
contributes most to the definition of the output at the specified
coordinate?"
The definition of which input represents the primary content input
and how the coordinate space of that input compares to the coordinate
space of the result varies from effect to effect.
Note that some effects may have a reasonable definition of how to
map destination coordinates back to source coordinates, but not the
reverse.
In particular, effects which produce entirely synthetic results not
based on any content input may not be able to give a meaningful
result to this query and may return undefined coordinates such as
0
, Infinity
, or NaN
.
Most effects perform simple transformations of the color of each
pixel and so represent an identity transform and return the point
unchanged.
untransform
in class Effect
p
- the point in the coordinate space of the result output
to be transformeddefaultInput
- the default input Effect
to be used in
all cases where a filter has a null inputpublic Effect.AccelType getAccelType(FilterContext fctx)
Effect
AccelType
values, indicating
whether this Effect
is accelerated in hardware for the
given FilterContext
.getAccelType
in class Effect
AccelType
valuespublic boolean reducesOpaquePixels()
Effect
reducesOpaquePixels
in class Effect
public DirtyRegionContainer getDirtyRegions(Effect defaultInput, DirtyRegionPool regionPool)
Effect
getDirtyRegions
in class Effect
defaultInput
- the default input Effect
to be used in
all cases where a filter has a null inputregionPool
- the pool of dirty regions