StreamingRenderer (Geotools modules 21.0 API)

Object
- StreamingRenderer

All Implemented Interfaces:

GTRenderer
```
public class StreamingRenderer
extends Object
implements GTRenderer
```
A streaming implementation of the GTRenderer interface.
- Uses as little memory as possible by processing features as they come from the data source, instead of accumulating them up-front
Use this class if you need a stateless renderer that provides low memory footprint and decent rendering performance on the first call but don't need good optimal performance on subsequent calls on the same data.
The streaming renderer is not thread safe
Author:

James Macgill, dblasby, jessie eichar, Simone Giannecchini, Andrea Aime, Alessio Fabiani

Nested Class Summary

Nested Classes
Modifier and Type	Class and Description
`protected class`	`StreamingRenderer.EndRequest` Marks the end of the request flow, instructs the painting thread to exit
`protected class`	`StreamingRenderer.FeatureRenderedRequest` A request to paint a shape with a specific Style2D
`protected class`	`StreamingRenderer.MargeCompositingGroupRequest`
`protected class`	`StreamingRenderer.MergeLayersRequest` A request to merge multiple back buffers to the main graphics
`protected class`	`StreamingRenderer.PaintShapeRequest` A request to paint a shape with a specific Style2D
`protected class`	`StreamingRenderer.RenderCoverageReaderRequest` A request to render a raster
`protected class`	`StreamingRenderer.RenderDirectLayerRequest`
`class`	`StreamingRenderer.RenderingBlockingQueue` A blocking queue subclass with a special behavior for the occasion when the rendering stop has been requested: puts are getting ignored, and take always returns an EndRequest
`protected class`	`StreamingRenderer.RenderingRequest` A request sent to the painting thread
`protected class`	`StreamingRenderer.RenderRasterRequest` A request to render a raster

Field Summary

Fields
Modifier and Type	Field and Description
`static String`	`ADVANCED_PROJECTION_HANDLING_KEY` Enables advanced reprojection handling.
`static String`	`BYLAYER_INTERPOLATION`
`static String`	`CONTINUOUS_MAP_WRAPPING` Enabled continuous cartographic wrapping for projections that can wrap around their edges (e.g., Mercator): this results in a continous horizontal map much like Google Maps
`static String`	`DECLARED_SCALE_DENOM_KEY`
`static String`	`DPI_KEY`
`protected static FilterFactory2`	`filterFactory` Filter factory for creating bounding box filters
`static String`	`FORCE_EPSG_AXIS_ORDER_KEY`
`static String`	`LABEL_CACHE_KEY`
`protected LabelCache`	`labelCache`
`static String`	`LINE_WIDTH_OPTIMIZATION_KEY` Whether the thin line width optimization should be used, or not.
`static String`	`OPTIMIZE_FTS_RENDERING_KEY` Boolean flag controlling a memory/speed trade off related to how multiple feature type styles are rendered.
`protected StyledShapePainter`	`painter` The painter class we use to depict shapes onto the screen
`static String`	`RENDERING_BUFFER` The rendering buffer grows the query area to account for features that are contributing to the requested area due to their large symbolizer, or long label
`static String`	`SCALE_ACCURATE` Computes the scale as the ratio between map distances and real world distances, assuming 90dpi and taking into consideration projection deformations and actual earth shape.
`static String`	`SCALE_COMPUTATION_METHOD_KEY`
`static String`	`SCALE_OGC` Very simple and lenient scale computation method that conforms to the OGC SLD specification 1.0, page 26.
`protected double`	`scaleDenominator` The ratio required to scale the features to be rendered so that they fit into the output space.
`static String`	`TEXT_RENDERING_ADAPTIVE` Will use STRING mode for horizontal labels, OUTLINE mode for all other labels.
`static String`	`TEXT_RENDERING_KEY` The text rendering method, either TEXT_RENDERING_OUTLINE or TEXT_RENDERING_STRING
`static String`	`TEXT_RENDERING_OUTLINE` Text will be rendered using the associated `GlyphVector` outline, that is, a `Shape`.
`static String`	`TEXT_RENDERING_STRING` Text will be rendered using the usual calls gc.drawString/drawGlyphVector.
`static String`	`VECTOR_RENDERING_KEY` Boolean flag indicating whether vector rendering should be preferred when painting graphic fills.

Constructor Summary

Constructors
Constructor and Description

StreamingRenderer()
Creates a new instance of LiteRenderer without a context.

Constructors
Constructor and Description
`StreamingRenderer()` Creates a new instance of LiteRenderer without a context.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods Deprecated Methods
Modifier and Type	Method and Description
`void`	`addRenderListener(RenderListener listener)` adds a listener that responds to error events of feature rendered events.
`boolean`	`getConcatTransforms()` Flag which controls behaviour for applying affine transformation to the graphics object.
`MapContext`	`getContext()` Deprecated. The `MapContext` class is being phased out. Please use `setMapContent(org.geotools.map.MapContent)`.
`double`	`getGeneralizationDistance()` Returns the generalization distance in the screen space.
`RenderingHints`	`getJava2DHints()` Hints used to configure Java2D Graphics prior to rendering.
`MapContent`	`getMapContent()` Gets the `MapContent` instance which contains the data being rendered.
`static MathTransform`	`getMathTransform(CoordinateReferenceSystem sourceCRS, CoordinateReferenceSystem destCRS)`
`int`	`getMaxBackBufferMemory(int width, int height)` When drawing in optimized mode a 32bit surface is created for each FeatureTypeStyle other than the first in order to draw features in parallel while respecting the feature draw ordering multiple FTS impose.
`Map`	`getRendererHints()` Hints used to configure rendering process
`protected BlockingQueue<StreamingRenderer.RenderingRequest>`	`getRequestsQueue()` Builds the blocking queue used to bridge between the data loading thread and the painting one
`boolean`	`isCanTransform()`
`boolean`	`isInteractive()` Getter for property interactive.
`void`	`paint(Graphics2D graphics, Rectangle paintArea, AffineTransform worldToScreen)` Deprecated. Use paint(Graphics2D graphics, Rectangle paintArea, ReferencedEnvelope mapArea) or paint(Graphics2D graphics, Rectangle paintArea, ReferencedEnvelope mapArea, AffineTransform worldToScreen) instead.
`void`	`paint(Graphics2D graphics, Rectangle paintArea, Envelope mapArea)` Deprecated. Use paint(Graphics2D graphics, Rectangle paintArea, ReferencedEnvelope mapArea) or paint(Graphics2D graphics, Rectangle paintArea, ReferencedEnvelope mapArea, AffineTransform worldToScreen) instead.
`void`	`paint(Graphics2D graphics, Rectangle paintArea, Envelope mapArea, AffineTransform worldToScreen)` Deprecated. Use paint(Graphics2D graphics, Rectangle paintArea, ReferencedEnvelope mapArea) or paint(Graphics2D graphics, Rectangle paintArea, ReferencedEnvelope mapArea, AffineTransform worldToScreen) instead.
`void`	`paint(Graphics2D graphics, Rectangle paintArea, ReferencedEnvelope mapArea)` Renders features based on the map layers and their styles as specified in the map context using `setContext`.
`void`	`paint(Graphics2D graphics, Rectangle paintArea, ReferencedEnvelope mapArea, AffineTransform worldToScreen)` Renders features based on the map layers and their styles as specified in the map context using `setContext`.
`void`	`removeRenderListener(RenderListener listener)` Removes a render listener.
`void`	`setConcatTransforms(boolean flag)` Sets the flag which controls behaviour for applying affine transformation to the graphics object.
`void`	`setContext(MapContext context)` Deprecated. The `MapContext` class is being phased out. Please use `setMapContent(org.geotools.map.MapContent)`.
`void`	`setGeneralizationDistance(double d)` Sets the generalizazion distance in the screen space.
`void`	`setInteractive(boolean interactive)` Sets the interactive status of the renderer.
`void`	`setJava2DHints(RenderingHints hints)` Hints used to configure Java2D Graphics prior to rendering.
`void`	`setMapContent(MapContent mapContent)` Sets the `MapContent` which contains the data to be rendered.
`void`	`setRendererHints(Map hints)` Hints used to configure rendering process.
`void`	`setThreadPool(ExecutorService threadPool)` Sets a thread pool to be used in parallel rendering
`void`	`stopRendering()` If you call this method from another thread than the one that called `paint` or `render` the rendering will be forcefully stopped before termination

Methods inherited from class Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - SCALE_ACCURATE
```
public static final String SCALE_ACCURATE
```
    Computes the scale as the ratio between map distances and real world distances, assuming 90dpi and taking into consideration projection deformations and actual earth shape.
    Use this method only when in need of accurate computation. Will break if the data extent is outside of the currenct projection definition area.
    
    See Also:
    
    Constant Field Values
  - SCALE_OGC
```
public static final String SCALE_OGC
```
    Very simple and lenient scale computation method that conforms to the OGC SLD specification 1.0, page 26.
    This method is quite approximative, but should never break and ensure constant scale even on lat/lon unprojected maps (because in that case scale is computed as if the area was along the equator no matter what the real position is).
    
    See Also:
    
    Constant Field Values
  - RENDERING_BUFFER
```
public static final String RENDERING_BUFFER
```
    The rendering buffer grows the query area to account for features that are contributing to the requested area due to their large symbolizer, or long label
    
    See Also:
    
    Constant Field Values
  - filterFactory
```
protected static final FilterFactory2 filterFactory
```
    Filter factory for creating bounding box filters
  - scaleDenominator
```
protected double scaleDenominator
```
    The ratio required to scale the features to be rendered so that they fit into the output space.
  - labelCache
```
protected LabelCache labelCache
```
  - painter
```
protected StyledShapePainter painter
```
    The painter class we use to depict shapes onto the screen
  - TEXT_RENDERING_STRING
```
public static final String TEXT_RENDERING_STRING
```
    Text will be rendered using the usual calls gc.drawString/drawGlyphVector. This is a little faster, and more consistent with how the platform renders the text in other applications. The downside is that on most platform the label and its eventual halo are not properly centered.
  - TEXT_RENDERING_OUTLINE
```
public static final String TEXT_RENDERING_OUTLINE
```
    Text will be rendered using the associated GlyphVector outline, that is, a Shape. This ensures perfect centering between the text and the halo, but introduces more text aliasing.
  - TEXT_RENDERING_ADAPTIVE
```
public static final String TEXT_RENDERING_ADAPTIVE
```
    Will use STRING mode for horizontal labels, OUTLINE mode for all other labels. Works best when coupled with RenderingHints.VALUE_FRACTIONALMETRICS_ON
  - TEXT_RENDERING_KEY
```
public static final String TEXT_RENDERING_KEY
```
    The text rendering method, either TEXT_RENDERING_OUTLINE or TEXT_RENDERING_STRING
    
    See Also:
    
    Constant Field Values
  - LINE_WIDTH_OPTIMIZATION_KEY
```
public static final String LINE_WIDTH_OPTIMIZATION_KEY
```
    Whether the thin line width optimization should be used, or not.
    When rendering non antialiased lines adopting a width of 0 makes the java2d renderer get into a fast path that generates the same output as a 1 pixel wide line
    Unfortunately for antialiased rendering that optimization does not help, and disallows controlling the width of thin lines. It is provided as an explicit option as the optimization has been hard coded for years, removing it when antialiasing is on by default will invalidate lots of existing styles (making lines appear thicker).
    
    See Also:
    
    Constant Field Values
  - OPTIMIZE_FTS_RENDERING_KEY
```
public static final String OPTIMIZE_FTS_RENDERING_KEY
```
    Boolean flag controlling a memory/speed trade off related to how multiple feature type styles are rendered.
    When enabled (by default) multiple feature type styles against the same data source will be rendered in separate memory back buffers in a way that allows the source to be scanned only once (each back buffer is as big as the image being rendered).
    When disabled no memory back buffers will be used but the feature source will be scanned once for every feature type style declared against it
    
    See Also:
    
    Constant Field Values
  - ADVANCED_PROJECTION_HANDLING_KEY
```
public static final String ADVANCED_PROJECTION_HANDLING_KEY
```
    Enables advanced reprojection handling. Geometries will be sliced to fit into the area of definition of the rendering projection.
    
    See Also:
    
    Constant Field Values
  - CONTINUOUS_MAP_WRAPPING
```
public static final String CONTINUOUS_MAP_WRAPPING
```
    Enabled continuous cartographic wrapping for projections that can wrap around their edges (e.g., Mercator): this results in a continous horizontal map much like Google Maps
    
    See Also:
    
    Constant Field Values
  - VECTOR_RENDERING_KEY
```
public static final String VECTOR_RENDERING_KEY
```
    Boolean flag indicating whether vector rendering should be preferred when painting graphic fills. See SLDStyleFactory.isVectorRenderingEnabled() for more details.
    
    See Also:
    
    Constant Field Values
  - LABEL_CACHE_KEY
```
public static final String LABEL_CACHE_KEY
```
    See Also:
    
    Constant Field Values
  - FORCE_EPSG_AXIS_ORDER_KEY
```
public static final String FORCE_EPSG_AXIS_ORDER_KEY
```
    See Also:
    
    Constant Field Values
  - DPI_KEY
```
public static final String DPI_KEY
```
    See Also:
    
    Constant Field Values
  - DECLARED_SCALE_DENOM_KEY
```
public static final String DECLARED_SCALE_DENOM_KEY
```
    See Also:
    
    Constant Field Values
  - SCALE_COMPUTATION_METHOD_KEY
```
public static final String SCALE_COMPUTATION_METHOD_KEY
```
    See Also:
    
    Constant Field Values
  - BYLAYER_INTERPOLATION
```
public static final String BYLAYER_INTERPOLATION
```
    See Also:
    
    Constant Field Values
- Constructor Detail
  - StreamingRenderer
```
public StreamingRenderer()
```
    Creates a new instance of LiteRenderer without a context. Use it only to gain access to utility methods of this class or if you want to render random feature collections instead of using the map context interface
- Method Detail
  - setThreadPool
```
public void setThreadPool(ExecutorService threadPool)
```
    Sets a thread pool to be used in parallel rendering
    
    Parameters:
    
    threadPool -
  - setConcatTransforms
```
public void setConcatTransforms(boolean flag)
```
    Sets the flag which controls behaviour for applying affine transformation to the graphics object.
    
    Parameters:
    
    flag - If true then the transform will be concatenated to the existing transform. If false it will be replaced.
  - getConcatTransforms
```
public boolean getConcatTransforms()
```
    Flag which controls behaviour for applying affine transformation to the graphics object.
    
    Returns:
    
    a boolean flag. If true then the transform will be concatenated to the existing transform. If false it will be replaced.
  - addRenderListener
```
public void addRenderListener(RenderListener listener)
```
    adds a listener that responds to error events of feature rendered events.
    
    Specified by:
    
    addRenderListener in interface GTRenderer
    
    Parameters:
    
    listener - the listener to add.
    
    See Also:
    
    RenderListener
  - removeRenderListener
```
public void removeRenderListener(RenderListener listener)
```
    Removes a render listener.
    
    Specified by:
    
    removeRenderListener in interface GTRenderer
    
    Parameters:
    
    listener - the listener to remove.
    
    See Also:
    
    RenderListener
  - stopRendering
```
public void stopRendering()
```
    If you call this method from another thread than the one that called paint or render the rendering will be forcefully stopped before termination
    
    Specified by:
    
    stopRendering in interface GTRenderer
  - paint
```
public void paint(Graphics2D graphics,
                  Rectangle paintArea,
                  AffineTransform worldToScreen)
```
    Deprecated. Use paint(Graphics2D graphics, Rectangle paintArea, ReferencedEnvelope mapArea) or paint(Graphics2D graphics, Rectangle paintArea, ReferencedEnvelope mapArea, AffineTransform worldToScreen) instead.
    
    Renders features based on the map layers and their styles as specified in the map context using setContext.
    This version of the method assumes that the size of the output area and the transformation from coordinates to pixels are known. The latter determines the map scale. The viewport (the visible part of the map) will be calculated internally.
    
    Specified by:
    
    paint in interface GTRenderer
    
    Parameters:
    
    graphics - The graphics object to draw to.
    
    paintArea - The size of the output area in output units (eg: pixels).
    
    worldToScreen - A transform which converts World coordinates to Screen coordinates.
    
    TODO:
    
    Need to check if the Layer CoordinateSystem is different to the BoundingBox rendering CoordinateSystem and if so, then transform the coordinates.
  - paint
```
public void paint(Graphics2D graphics,
                  Rectangle paintArea,
                  Envelope mapArea)
```
    Deprecated. Use paint(Graphics2D graphics, Rectangle paintArea, ReferencedEnvelope mapArea) or paint(Graphics2D graphics, Rectangle paintArea, ReferencedEnvelope mapArea, AffineTransform worldToScreen) instead.
    
    Renders features based on the map layers and their styles as specified in the map context using setContext.
    This version of the method assumes that the area of the visible part of the map and the size of the output area are known. The transform between the two is calculated internally.
    
    Specified by:
    
    paint in interface GTRenderer
    
    Parameters:
    
    graphics - The graphics object to draw to.
    
    paintArea - The size of the output area in output units (eg: pixels).
    
    mapArea - the map's visible area (viewport) in map coordinates.
  - paint
```
public void paint(Graphics2D graphics,
                  Rectangle paintArea,
                  ReferencedEnvelope mapArea)
```
    Renders features based on the map layers and their styles as specified in the map context using setContext.
    This version of the method assumes that the area of the visible part of the map and the size of the output area are known. The transform between the two is calculated internally.
    
    Specified by:
    
    paint in interface GTRenderer
    
    Parameters:
    
    graphics - The graphics object to draw to.
    
    paintArea - The size of the output area in output units (eg: pixels).
    
    mapArea - the map's visible area (viewport) in map coordinates.
  - paint
```
public void paint(Graphics2D graphics,
                  Rectangle paintArea,
                  Envelope mapArea,
                  AffineTransform worldToScreen)
```
    Deprecated. Use paint(Graphics2D graphics, Rectangle paintArea, ReferencedEnvelope mapArea) or paint(Graphics2D graphics, Rectangle paintArea, ReferencedEnvelope mapArea, AffineTransform worldToScreen) instead.
    
    Renders features based on the map layers and their styles as specified in the map context using setContext.
    This version of the method assumes that paint area, envelope and worldToScreen transform are already computed. Use this method to avoid recomputation. Note however that no check is performed that they are really in sync!
    
    Specified by:
    
    paint in interface GTRenderer
    
    Parameters:
    
    graphics - The graphics object to draw to.
    
    paintArea - The size of the output area in output units (eg: pixels).
    
    mapArea - the map's visible area (viewport) in map coordinates.
    
    worldToScreen - A transform which converts World coordinates to Screen coordinates.
  paint
  
  public void paint(Graphics2D graphics, Rectangle paintArea, ReferencedEnvelope mapArea, AffineTransform worldToScreen)
  
  Renders features based on the map layers and their styles as specified in the map context using setContext.
  This version of the method assumes that paint area, envelope and worldToScreen transform are already computed. Use this method to avoid recomputation. Note however that no check is performed that they are really in sync!
  
  Specified by:
  
  paint in interface GTRenderer
  
  Parameters:
  
  graphics - The graphics object to draw to.
  
  paintArea - The size of the output area in output units (eg: pixels).
  
  mapArea - the map's visible area (viewport) in map coordinates. Its associate CRS is ALWAYS 2D
  
  worldToScreen - A transform which converts World coordinates to Screen coordinates.
  
  getRequestsQueue
  
  protected BlockingQueue<StreamingRenderer.RenderingRequest> getRequestsQueue()
  
  Builds the blocking queue used to bridge between the data loading thread and the painting one
  
  Returns:
  
  getMaxBackBufferMemory
  
  public int getMaxBackBufferMemory(int width, int height)
  
  When drawing in optimized mode a 32bit surface is created for each FeatureTypeStyle other than the first in order to draw features in parallel while respecting the feature draw ordering multiple FTS impose. This method allows to estimate how many megabytes will be needed, in terms of back buffers, to draw the current MapContext, assuming the feature type style optimizations are turned on (in the case they are off, no extra memory will be used).
  
  Parameters:
  
  width - the image width
  
  height - the image height
  
  isInteractive
  
  public boolean isInteractive()
  
  Getter for property interactive.
  
  Returns:
  
  Value of property interactive.
  
  setInteractive
  
  public void setInteractive(boolean interactive)
  
  Sets the interactive status of the renderer. An interactive renderer won't wait for long image loading, preferring an alternative mark instead
  
  Parameters:
  
  interactive - new value for the interactive property
  
  getGeneralizationDistance
  
  public double getGeneralizationDistance()
  
  Returns the generalization distance in the screen space.
  
  setGeneralizationDistance
  
  public void setGeneralizationDistance(double d)
  
  Sets the generalizazion distance in the screen space.
  Default value is 0.8, meaning that two subsequent points are collapsed to one if their on screen distance is less than one pixel
  Set the distance to 0 if you don't want any kind of generalization
  
  Parameters:
  
  d -
  
  setJava2DHints
  
  public void setJava2DHints(RenderingHints hints)
  
  Description copied from interface: GTRenderer
  
  Hints used to configure Java2D Graphics prior to rendering.
  
  Specified by:
  
  setJava2DHints in interface GTRenderer
  
  getJava2DHints
  
  public RenderingHints getJava2DHints()
  
  Description copied from interface: GTRenderer
  
  Hints used to configure Java2D Graphics prior to rendering.
  
  Specified by:
  
  getJava2DHints in interface GTRenderer
  
  Returns:
  
  Hints
  
  setRendererHints
  
  public void setRendererHints(Map hints)
  
  Description copied from interface: GTRenderer
  
  Hints used to configure rendering process.
  
  Specified by:
  
  setRendererHints in interface GTRenderer
  
  getRendererHints
  
  public Map getRendererHints()
  
  Description copied from interface: GTRenderer
  
  Hints used to configure rendering process
  
  Specified by:
  
  getRendererHints in interface GTRenderer
  
  Returns:
  
  Hints used to configure rendering process
  
  setContext
  
  public void setContext(MapContext context)
  
  Deprecated. The MapContext class is being phased out. Please use setMapContent(org.geotools.map.MapContent).
  
  Map content to render.
  
  Specified by:
  
  setContext in interface GTRenderer
  
  getContext
  
  public MapContext getContext()
  
  Deprecated. The MapContext class is being phased out. Please use setMapContent(org.geotools.map.MapContent).
  
  Map content being rendered.
  
  Specified by:
  
  getContext in interface GTRenderer
  
  Returns:
  
  Map content being rendered.
  
  setMapContent
  
  public void setMapContent(MapContent mapContent)
  
  Description copied from interface: GTRenderer
  
  Sets the MapContent which contains the data to be rendered.
  
  Specified by:
  
  setMapContent in interface GTRenderer
  
  Parameters:
  
  mapContent - the map content
  
  getMapContent
  
  public MapContent getMapContent()
  
  Description copied from interface: GTRenderer
  
  Gets the MapContent instance which contains the data being rendered.
  
  Specified by:
  
  getMapContent in interface GTRenderer
  
  Returns:
  
  the MapContent instance
  
  isCanTransform
  
  public boolean isCanTransform()
  
  getMathTransform
  
  public static MathTransform getMathTransform(CoordinateReferenceSystem sourceCRS, CoordinateReferenceSystem destCRS)

Class StreamingRenderer

Nested Class Summary

Field Summary

Constructor Summary

Method Summary

Methods inherited from class Object

Field Detail

SCALE_ACCURATE

SCALE_OGC

RENDERING_BUFFER

filterFactory

scaleDenominator

labelCache

painter

TEXT_RENDERING_STRING

TEXT_RENDERING_OUTLINE

TEXT_RENDERING_ADAPTIVE

TEXT_RENDERING_KEY

LINE_WIDTH_OPTIMIZATION_KEY

OPTIMIZE_FTS_RENDERING_KEY

ADVANCED_PROJECTION_HANDLING_KEY

CONTINUOUS_MAP_WRAPPING

VECTOR_RENDERING_KEY

LABEL_CACHE_KEY

FORCE_EPSG_AXIS_ORDER_KEY

DPI_KEY

DECLARED_SCALE_DENOM_KEY

SCALE_COMPUTATION_METHOD_KEY

BYLAYER_INTERPOLATION

Constructor Detail

StreamingRenderer

Method Detail

setThreadPool

setConcatTransforms

getConcatTransforms

addRenderListener

removeRenderListener

stopRendering

paint

paint

paint

paint

paint

getRequestsQueue

getMaxBackBufferMemory

isInteractive

setInteractive

getGeneralizationDistance

setGeneralizationDistance

setJava2DHints

getJava2DHints

setRendererHints

getRendererHints

setContext

getContext

setMapContent

getMapContent

isCanTransform

getMathTransform