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## org.apache.batik.ext.awt.image.codec.tiff
Class TIFFEncodeParam

    java.lang.Object
      org.apache.batik.ext.awt.image.codec.tiff.TIFFEncodeParam

All Implemented Interfaces:
  java.lang.Cloneable, ImageDecodeParam, ImageEncodeParam, java.io.Serializable

public class TIFFEncodeParam
extends java.lang.Object
implements ImageEncodeParam

An instance of `ImageEncodeParam` for encoding images in the TIFF format.

This class allows for the specification of encoding parameters. By default, the image is encoded without any compression, and is written out consisting of strips, not tiles. The particular compression scheme to be used can be specified by using the `setCompression()` method. The compression scheme specified will be honored only if it is compatible with the type of image being written out. For example, Group3 and Group4 compressions can only be used with Bilevel images. Writing of tiled TIFF images can be enabled by calling the `setWriteTiled()` method.

This class is not a committed part of the JAI API. It may be removed or changed in future releases of JAI.

See Also:
  Serialized Form

Field Summary
`static int` | `COMPRESSION_DEFLATE` DEFLATE lossless compression (also known as "Zip-in-TIFF").
`static int` | `COMPRESSION_GROUP3_1D` Modified Huffman Compression (CCITT Group 3 1D facsimile compression).
`static int` | `COMPRESSION_GROUP3_2D` CCITT T.4 bilevel compression (CCITT Group 3 2D facsimile compression).
`static int` | `COMPRESSION_GROUP4` CCITT T.6 bilevel compression (CCITT Group 4 facsimile compression).
`static int` | `COMPRESSION_JPEG_BROKEN` Code for original JPEG-in-TIFF compression which has been depricated (for many good reasons) in favor of Tech Note 2 JPEG compression (compression scheme 7).
`static int` | `COMPRESSION_JPEG_TTN2` JPEG-in-TIFF compression.
`static int` | `COMPRESSION_LZW` LZW compression.
`static int` | `COMPRESSION_NONE` No compression.
`static int` | `COMPRESSION_PACKBITS` Byte-oriented run-length encoding "PackBits" compression.

Constructor Summary
`TIFFEncodeParam()` Constructs a TIFFEncodeParam object with default values for all parameters.

Method Summary
`int` | `getCompression()` Returns the value of the compression parameter.
`int` | `getDeflateLevel()` Gets the compression level for DEFLATE compression.
`TIFFField[]` | `getExtraFields()` Returns the value set by `setExtraFields()`.
`java.util.Iterator` | `getExtraImages()` Returns the additional image `Iterator` specified via `setExtraImages()` or `null` if none was supplied or if a `null` value was supplied.
`boolean` | `getJPEGCompressRGBToYCbCr()` Whether RGB data will be converted to YCbCr when using JPEG compression.
`com.sun.image.codec.jpeg.JPEGEncodeParam` | `getJPEGEncodeParam()` Retrieves the JPEG compression parameters.
`int` | `getTileHeight()` Retrieves the tile height set via `setTileSize()`.
`int` | `getTileWidth()` Retrieves the tile width set via `setTileSize()`.
`boolean` | `getWriteTiled()` Returns the value of the writeTiled parameter.
`void` | `setCompression(int compression)` Specifies the type of compression to be used.
`void` | `setDeflateLevel(int deflateLevel)` Sets the compression level for DEFLATE-compressed data which should either be `java.util.Deflater.DEFAULT_COMPRESSION` or a value in the range [1,9] where larger values indicate more compression.
`void` | `setExtraFields(TIFFField[] extraFields)` Sets an array of extra fields to be written to the TIFF Image File Directory (IFD).
`void` | `setExtraImages(java.util.Iterator extraImages)` Sets an `Iterator` of additional images to be written after the image passed as an argument to the `ImageEncoder`.
`void` | `setJPEGCompressRGBToYCbCr(boolean convertJPEGRGBToYCbCr)` Sets flag indicating whether to convert RGB data to YCbCr when the compression type is JPEG.
`void` | `setJPEGEncodeParam(com.sun.image.codec.jpeg.JPEGEncodeParam jpegEncodeParam)` Sets the JPEG compression parameters.
`void` | `setTileSize(int tileWidth, int tileHeight)` Sets the dimensions of the tiles to be written.
`void` | `setWriteTiled(boolean writeTiled)` If set, the data will be written out in tiled format, instead of in strips.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### COMPRESSION_NONE

    public static final int COMPRESSION_NONE

  No compression.

  See Also:
    Constant Field Values

### COMPRESSION_GROUP3_1D

    public static final int COMPRESSION_GROUP3_1D

  Modified Huffman Compression (CCITT Group 3 1D facsimile compression).

  Not currently supported.

  See Also:
    Constant Field Values

### COMPRESSION_GROUP3_2D

    public static final int COMPRESSION_GROUP3_2D

  CCITT T.4 bilevel compression (CCITT Group 3 2D facsimile compression).

  Not currently supported.

  See Also:
    Constant Field Values

### COMPRESSION_GROUP4

    public static final int COMPRESSION_GROUP4

  CCITT T.6 bilevel compression (CCITT Group 4 facsimile compression).

  Not currently supported.

  See Also:
    Constant Field Values

### COMPRESSION_LZW

    public static final int COMPRESSION_LZW

  LZW compression.

  Not supported.

  See Also:
    Constant Field Values

### COMPRESSION_JPEG_BROKEN

    public static final int COMPRESSION_JPEG_BROKEN

  Code for original JPEG-in-TIFF compression which has been depricated (for many good reasons) in favor of Tech Note 2 JPEG compression (compression scheme 7).

  Not supported.

  See Also:
    Constant Field Values

### COMPRESSION_JPEG_TTN2

    public static final int COMPRESSION_JPEG_TTN2

  JPEG-in-TIFF compression.

  See Also:
    Constant Field Values

### COMPRESSION_PACKBITS

    public static final int COMPRESSION_PACKBITS

  Byte-oriented run-length encoding "PackBits" compression.

  See Also:
    Constant Field Values

### COMPRESSION_DEFLATE

    public static final int COMPRESSION_DEFLATE

  DEFLATE lossless compression (also known as "Zip-in-TIFF").

  See Also:
    Constant Field Values

Constructor Detail

### TIFFEncodeParam

    public TIFFEncodeParam()

  Constructs a TIFFEncodeParam object with default values for all parameters.

Method Detail

### getCompression

    public int getCompression()

  Returns the value of the compression parameter.

### setCompression

    public void setCompression(int compression)

  Specifies the type of compression to be used. The compression type specified will be honored only if it is compatible with the image being written out. Currently only PackBits, JPEG, and DEFLATE compression schemes are supported.

  If `compression` is set to any value but `COMPRESSION_NONE` and the `OutputStream` supplied to the `ImageEncoder` is not a `SeekableOutputStream`, then the encoder will use either a temporary file or a memory cache when compressing the data depending on whether the file system is accessible. Compression will therefore be more efficient if a `SeekableOutputStream` is supplied.

  Parameters:
    `compression` - The compression type.

### getWriteTiled

    public boolean getWriteTiled()

  Returns the value of the writeTiled parameter.

### setWriteTiled

    public void setWriteTiled(boolean writeTiled)

  If set, the data will be written out in tiled format, instead of in strips.

  Parameters:
    `writeTiled` - Specifies whether the image data should be wriiten out in tiled format.

### setTileSize

    public void setTileSize(int tileWidth,
                            int tileHeight)

  Sets the dimensions of the tiles to be written. If either value is non-positive, the encoder will use a default value.

  If the data are being written as tiles, i.e., `getWriteTiled()` returns `true`, then the default tile dimensions used by the encoder are those of the tiles of the image being encoded.

  If the data are being written as strips, i.e., `getWriteTiled()` returns `false`, the width of each strip is always the width of the image and the default number of rows per strip is 8.

  If JPEG compession is being used, the dimensions of the strips or tiles may be modified to conform to the JPEG-in-TIFF specification.

  Parameters:
    `tileWidth` - The tile width; ignored if strips are used.
    `tileHeight` - The tile height or number of rows per strip.

### getTileWidth

    public int getTileWidth()

  Retrieves the tile width set via `setTileSize()`.

### getTileHeight

    public int getTileHeight()

  Retrieves the tile height set via `setTileSize()`.

### setExtraImages

    public void setExtraImages(java.util.Iterator extraImages)

  Sets an `Iterator` of additional images to be written after the image passed as an argument to the `ImageEncoder`. The methods on the supplied `Iterator` must only be invoked by the `ImageEncoder` which will exhaust the available values unless an error occurs.

  The value returned by an invocation of `next()` on the `Iterator` must return either a `RenderedImage` or an `Object[]` of length 2 wherein the element at index zero is a `RenderedImage` amd the other element is a `TIFFEncodeParam`. If no `TIFFEncodeParam` is supplied in this manner for an additional image, the parameters used to create the `ImageEncoder` will be used. The extra image `Iterator` set on any `TIFFEncodeParam` of an additional image will in all cases be ignored.

### getExtraImages

    public java.util.Iterator getExtraImages()

  Returns the additional image `Iterator` specified via `setExtraImages()` or `null` if none was supplied or if a `null` value was supplied.

### setDeflateLevel

    public void setDeflateLevel(int deflateLevel)

  Sets the compression level for DEFLATE-compressed data which should either be `java.util.Deflater.DEFAULT_COMPRESSION` or a value in the range [1,9] where larger values indicate more compression. The default setting is `Deflater.DEFAULT_COMPRESSION`. This setting is ignored if the compression type is not DEFLATE.

### getDeflateLevel

    public int getDeflateLevel()

  Gets the compression level for DEFLATE compression.

### setJPEGCompressRGBToYCbCr

    public void setJPEGCompressRGBToYCbCr(boolean convertJPEGRGBToYCbCr)

  Sets flag indicating whether to convert RGB data to YCbCr when the compression type is JPEG. The default value is `true`. This flag is ignored if the compression type is not JPEG.

### getJPEGCompressRGBToYCbCr

    public boolean getJPEGCompressRGBToYCbCr()

  Whether RGB data will be converted to YCbCr when using JPEG compression.

### setJPEGEncodeParam

    public void setJPEGEncodeParam(com.sun.image.codec.jpeg.JPEGEncodeParam jpegEncodeParam)

  Sets the JPEG compression parameters. These parameters are ignored if the compression type is not JPEG. The argument may be `null` to indicate that default compression parameters are to be used. For maximum conformance with the specification it is recommended in most cases that only the quality compression parameter be set.

  The `writeTablesOnly` and `JFIFHeader` flags of the `JPEGEncodeParam` are ignored. The `writeImageOnly` flag is used to determine whether the JPEGTables field will be written to the TIFF stream: if `writeImageOnly` is `true`, then the JPEGTables field will be written and will contain a valid JPEG abbreviated table specification datastream. In this case the data in each data segment (strip or tile) will contain an abbreviated JPEG image datastream. If the `writeImageOnly` flag is `false`, then the JPEGTables field will not be written and each data segment will contain a complete JPEG interchange datastream.

### getJPEGEncodeParam

    public com.sun.image.codec.jpeg.JPEGEncodeParam getJPEGEncodeParam()

  Retrieves the JPEG compression parameters.

### setExtraFields

    public void setExtraFields(TIFFField[] extraFields)

  Sets an array of extra fields to be written to the TIFF Image File Directory (IFD). Fields with tags equal to the tag of any automatically generated fields are ignored. No error checking is performed with respect to the validity of the field contents or the appropriateness of the field for the image being encoded.

  Parameters:
    `extraFields` - An array of extra fields; the parameter is copied by reference.

### getExtraFields

    public TIFFField[] getExtraFields()

  Returns the value set by `setExtraFields()`.

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Copyright © 2004 Apache Software Foundation. All Rights Reserved.