public Class Identity

Implements abstract com.sun.scenario.effect.Effect.filter.

Doc from com.sun.scenario.effect.Effect.filter.

Applies this filter effect to the series of images represented by the input Effects 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);
      

Parameters

fctx:FilterContext

the FilterContext that determines the environment (e.g. the graphics device or code path) on which the filter operation will be performed

transform:BaseTransform

an optional transform under which the filter and its inputs will be viewed

outputClip:Rectangle

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:Object

an object which might be used to render the results of the effect directly.

defaultInput:Effect

the default input Effect to be used in all cases where a filter has a null input.

Returns:ImageData

the 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.

Annotations

@Override

Implements abstract com.sun.scenario.effect.Effect.getAccelType.

Doc from com.sun.scenario.effect.Effect.getAccelType.

Returns one of the AccelType values, indicating whether this Effect is accelerated in hardware for the given FilterContext.

Returns:Effect.AccelType

one of the AccelType values

Annotations

@Override

Implements abstract com.sun.scenario.effect.Effect.getBounds.

Doc from com.sun.scenario.effect.Effect.getBounds.

Returns the bounding box that will be affected by this filter operation when viewed under the specified transform, given its list of input Effects and the specified defaultInput effect. Note that the returned bounds can be smaller or larger than one or more of the inputs.

Parameters

transform:BaseTransform

the transform the effect will be viewed under

defaultInput:Effect

the default input Effect to be used in all cases where a filter has a null input

Returns:BaseBounds

the bounding box of this filter

Annotations

@Override

Overrides com.sun.scenario.effect.Effect.getDirtyRegions.

Doc from com.sun.scenario.effect.Effect.getDirtyRegions.

Returns the dirty region container containing dirty regions affected by this filter operation.

Parameters

defaultInput:Effect

the default input Effect to be used in all cases where a filter has a null input

regionPool:DirtyRegionPool

the pool of dirty regions

Returns:DirtyRegionContainer

the dirty region container

Annotations

@Override

Returns the location of the source image, relative to the untransformed source content bounds.

Returns:Point2D

the location of the source image

Returns the source image (can be null).

Returns:Filterable

the source image

Implements abstract com.sun.scenario.effect.Effect.reducesOpaquePixels.

Doc from com.sun.scenario.effect.Effect.reducesOpaquePixels.

Whether an opacity for any pixel is different (lower) than the corresponding pixel in the default input. It is always safe to return true from this method, though the consequences may be that the caller chooses to not utilize a planned optimization.

Returns:boolean

true if this effect may reduce opacity of some pixels of one of it's input (and thus the default input) or it's relevant input(s) might have reduced opaque pixels of the default input already.

Annotations

@Override

Sets the location of the source image, relative to the untransformed source content bounds.

Parameters

pt:Point2D

the new location of the source image

Exceptions

IllegalArgumentException:

if pt is null

Sets the source image.

Parameters

src:Filterable

the source image, or null