Scale (Apache Ant API)
Description: declaration: package: org.apache.tools.ant.types.optional.imageio, class: Scale

# Class Scale

java.lang.Object
org.apache.tools.ant.ProjectComponent
org.apache.tools.ant.types.DataType
org.apache.tools.ant.types.optional.imageio.ImageOperation
org.apache.tools.ant.types.optional.imageio.TransformOperation
org.apache.tools.ant.types.optional.imageio.Scale

All Implemented Interfaces:
  `Cloneable, DrawOperation`

public class Scale extends TransformOperation implements DrawOperation

See Also:
  - `ImageIOTask`

- ## Nested Class Summary

  Nested Classes
  Modifier and Type
  Class
  Description
  `static class`
  `Scale.ProportionsAttribute`
  Enumerated class for proportions attribute.

- ## Field Summary

  ### Fields inherited from class ImageOperation

  `instructions`
  Modifier and Type
  Field
  Description
  `protected final List<ImageOperation>`
  `instructions`

  ### Fields inherited from class DataType

  `checked, ref`
  Modifier and Type
  Field
  Description
  `protected boolean`
  `checked`
  Deprecated.
  since 1.7.
  `protected Reference`
  `ref`
  Deprecated.
  since 1.7.

  ### Fields inherited from class ProjectComponent

  `description, location, project`
  Modifier and Type
  Field
  Description
  `protected String`
  `description`
  Deprecated.
  since 1.6.x.
  `protected Location`
  `location`
  Deprecated.
  since 1.6.x.
  `protected Project`
  `project`
  Deprecated.
  since 1.6.x.

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `Scale()`

- ## Method Summary

  Modifier and Type
  Method
  Description
  `BufferedImage`
  `executeDrawOperation()`
  Abstract method which is intended to create an image buffer and return it so it can be drawn into another object.
  `BufferedImage`
  `executeTransformOperation(BufferedImage image)`
  Performs the transformations.
  `float`
  `getHeight()`
  Get the height.
  `float`
  `getWidth()`
  Get the width.
  `BufferedImage`
  `performScale(BufferedImage image)`
  Scale an image.
  `void`
  `setHeight(String height)`
  Sets the height of the image, either as an integer or a %.
  `void`
  `setProportions(Scale.ProportionsAttribute pa)`
  Sets the behaviour regarding the image proportions.
  `void`
  `setWidth(String width)`
  Sets the width of the image, either as an integer or a %.

  ### Methods inherited from class ImageOperation

  `addDraw, addRotate, addScale`
  Modifier and Type
  Method
  Description
  `void`
  `addDraw(Draw instr)`
  Add a draw to the operation.
  `void`
  `addRotate(Rotate instr)`
  Add a rotate to the operation.
  `void`
  `addScale(Scale instr)`
  Add a scale to the operation.

  ### Methods inherited from class DataType

  `checkAttributesAllowed, checkChildrenAllowed, circularReference, clone, dieOnCircularReference, dieOnCircularReference, dieOnCircularReference, getCheckedRef, getCheckedRef, getCheckedRef, getCheckedRef, getCheckedRef, getDataTypeName, getRefid, invokeCircularReferenceCheck, isChecked, isReference, noChildrenAllowed, pushAndInvokeCircularReferenceCheck, setChecked, setRefid, tooManyAttributes, toString`
  Modifier and Type
  Method
  Description
  `protected void`
  `checkAttributesAllowed()`
  check that it is ok to set attributes, i.e that no reference is defined
  `protected void`
  `checkChildrenAllowed()`
  check that it is ok to add children, i.e that no reference is defined
  `protected BuildException`
  `circularReference()`
  Creates an exception that indicates the user has generated a loop of data types referencing each other.
  `Object`
  `clone()`
  `protected void`
  `dieOnCircularReference()`
  Convenience method.
  `protected void`
  `dieOnCircularReference(Stack<Object> stack, Project project)`
  Check to see whether any DataType we hold references to is included in the Stack (which holds all DataType instances that directly or indirectly reference this instance, including this instance itself).
  `protected void`
  `dieOnCircularReference(Project p)`
  Convenience method.
  `protected <T> T`
  `getCheckedRef()`
  Deprecated.
  use getCheckedRef(Class)
  `protected <T> T`
  `getCheckedRef(Class<T> requiredClass)`
  Performs the check for circular references and returns the referenced object.
  `protected <T> T`
  `getCheckedRef(Class<T> requiredClass, String dataTypeName)`
  Performs the check for circular references and returns the referenced object.
  `protected <T> T`
  `getCheckedRef(Class<T> requiredClass, String dataTypeName, Project project)`
  Performs the check for circular references and returns the referenced object.
  `protected <T> T`
  `getCheckedRef(Project p)`
  Deprecated.
  use getCheckedRef(Class)
  `protected String`
  `getDataTypeName()`
  Gets as descriptive as possible a name used for this datatype instance.
  `Reference`
  `getRefid()`
  get the reference set on this object
  `static void`
  `invokeCircularReferenceCheck(DataType dt, Stack<Object> stk, Project p)`
  Allow DataTypes outside org.apache.tools.ant.types to indirectly call dieOnCircularReference on nested DataTypes.
  `protected boolean`
  `isChecked()`
  The flag that is used to indicate that circular references have been checked.
  `boolean`
  `isReference()`
  Has the refid attribute of this element been set?
  `protected BuildException`
  `noChildrenAllowed()`
  Creates an exception that indicates that this XML element must not have child elements if the refid attribute is set.
  `static void`
  `pushAndInvokeCircularReferenceCheck(DataType dt, Stack<Object> stk, Project p)`
  Allow DataTypes outside org.apache.tools.ant.types to indirectly call dieOnCircularReference on nested DataTypes.
  `protected void`
  `setChecked(boolean checked)`
  Set the flag that is used to indicate that circular references have been checked.
  `void`
  `setRefid(Reference ref)`
  Set the value of the refid attribute.
  `protected BuildException`
  `tooManyAttributes()`
  Creates an exception that indicates that refid has to be the only attribute if it is set.
  `String`
  `toString()`
  Basic DataType toString().

  ### Methods inherited from class ProjectComponent

  `getDescription, getLocation, getProject, log, log, setDescription, setLocation, setProject`
  Modifier and Type
  Method
  Description
  `String`
  `getDescription()`
  Returns the description of the current action.
  `Location`
  `getLocation()`
  Returns the file/location where this task was defined.
  `Project`
  `getProject()`
  Returns the project to which this component belongs.
  `void`
  `log(String msg)`
  Logs a message with the default (INFO) priority.
  `void`
  `log(String msg, int msgLevel)`
  Logs a message with the given priority.
  `void`
  `setDescription(String desc)`
  Sets a description of the current action.
  `void`
  `setLocation(Location location)`
  Sets the file/location where this task was defined.
  `void`
  `setProject(Project project)`
  Sets the project object of this component.

  ### Methods inherited from class Object

  `equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

- ## Constructor Details

  - ### Scale

    public Scale()

- ## Method Details

  - ### setProportions

    public void setProportions(Scale.ProportionsAttribute pa)
    Sets the behaviour regarding the image proportions.
    Parameters:
      `pa` - the enumerated value.

  - ### setWidth

    public void setWidth(String width)
    Sets the width of the image, either as an integer or a %. Defaults to 100%.
    Parameters:
      `width` - the value to use.

  - ### setHeight

    public void setHeight(String height)
    Sets the height of the image, either as an integer or a %. Defaults to 100%.
    Parameters:
      `height` - the value to use.

  - ### getWidth

    public float getWidth()
    Get the width.
    Returns:
      the value converted from the width string.

  - ### getHeight

    public float getHeight()
    Get the height.
    Returns:
      the value converted from the height string.

  - ### performScale

    public BufferedImage performScale(BufferedImage image)
    Scale an image.
    Parameters:
      `image` - the image to scale.
    Returns:
      the scaled image.

  - ### executeTransformOperation

    public BufferedImage executeTransformOperation(BufferedImage image)
    Performs the transformations..
    Specified by:
      `executeTransformOperation` in class `TransformOperation`
    Parameters:
      `image` - The image to perform the transformation on.
    Returns:
      the transformed image.

  - ### executeDrawOperation

    public BufferedImage executeDrawOperation()
    Abstract method which is intended to create an image buffer and return it so it can be drawn into another object. Use an Alpha channel for a "transparent" background..
    Specified by:
      `executeDrawOperation` in interface `DrawOperation`
    Returns:
      a planar image