Package org.libjpegturbo.turbojpeg

Class TJTransform

java.lang.Object

java.awt.geom.RectangularShape

java.awt.geom.Rectangle2D

java.awt.Rectangle

org.libjpegturbo.turbojpeg.TJTransform

All Implemented Interfaces:

java.awt.Shape, java.io.Serializable, java.lang.Cloneable

public class TJTransform
extends java.awt.Rectangle

Lossless transform parameters

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class java.awt.geom.Rectangle2D

java.awt.geom.Rectangle2D.Double, java.awt.geom.Rectangle2D.Float

Field Summary

Fields

Modifier and Type	Field	Description
TJCustomFilter	cf	Custom filter instance
static int	NUMOP	The number of lossless transform operations
int	op	Transform operation (one of OP_*)
static int	OP_HFLIP	Flip (mirror) image horizontally.
static int	OP_NONE	Do not transform the position of the image pixels.
static int	OP_ROT180	Rotate image 180 degrees.
static int	OP_ROT270	Rotate image counter-clockwise by 90 degrees.
static int	OP_ROT90	Rotate image clockwise by 90 degrees.
static int	OP_TRANSPOSE	Transpose image (flip/mirror along upper left to lower right axis).
static int	OP_TRANSVERSE	Transverse transpose image (flip/mirror along upper right to lower left axis).
static int	OP_VFLIP	Flip (mirror) image vertically.
static int	OPT_ARITHMETIC	This option will enable arithmetic entropy coding in the JPEG image generated by this particular transform.
static int	OPT_COPYNONE	This option will prevent TJTransformer.transform() from copying any extra markers (including EXIF and ICC profile data) from the source image to the destination image.
static int	OPT_CROP	This option will enable lossless cropping.
static int	OPT_GRAY	This option will discard the color data in the source image and produce a grayscale destination image.
static int	OPT_NOOUTPUT	This option will prevent TJTransformer.transform() from outputting a JPEG image for this particular transform.
static int	OPT_OPTIMIZE	This option will enable optimized baseline entropy coding in the JPEG image generated by this particular transform.
static int	OPT_PERFECT	This option will cause TJTransformer.transform() to throw an exception if the transform is not perfect.
static int	OPT_PROGRESSIVE	This option will enable progressive entropy coding in the JPEG image generated by this particular transform.
static int	OPT_TRIM	This option will discard any partial MCU blocks that cannot be transformed.
int	options	Transform options (bitwise OR of one or more of OPT_*)

Fields inherited from class java.awt.Rectangle

height, width, x, y

Fields inherited from class java.awt.geom.Rectangle2D

OUT_BOTTOM, OUT_LEFT, OUT_RIGHT, OUT_TOP

Constructor Summary

Constructors

Constructor	Description
TJTransform()	Create a new lossless transform instance.
TJTransform(int x, int y, int w, int h, int op, int options, TJCustomFilter cf)	Create a new lossless transform instance with the given parameters.
TJTransform(java.awt.Rectangle r, int op, int options, TJCustomFilter cf)	Create a new lossless transform instance with the given parameters.

Method Summary

Methods inherited from class java.awt.Rectangle

add, add, add, contains, contains, contains, contains, createIntersection, createUnion, equals, getBounds, getBounds2D, getHeight, getLocation, getSize, getWidth, getX, getY, grow, inside, intersection, intersects, isEmpty, move, outcode, reshape, resize, setBounds, setBounds, setLocation, setLocation, setRect, setSize, setSize, toString, translate, union

Methods inherited from class java.awt.geom.Rectangle2D

add, add, add, contains, contains, getPathIterator, getPathIterator, hashCode, intersect, intersects, intersectsLine, intersectsLine, outcode, setFrame, setRect, union

Methods inherited from class java.awt.geom.RectangularShape

clone, contains, contains, getCenterX, getCenterY, getFrame, getMaxX, getMaxY, getMinX, getMinY, intersects, setFrame, setFrame, setFrameFromCenter, setFrameFromCenter, setFrameFromDiagonal, setFrameFromDiagonal

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.awt.Shape

contains, contains, contains, contains, getPathIterator, getPathIterator, intersects, intersects

Field Detail

NUMOP

public static final int NUMOP

The number of lossless transform operations

See Also:

Constant Field Values

OP_NONE

public static final int OP_NONE

Do not transform the position of the image pixels.

See Also:

Constant Field Values

OP_HFLIP

public static final int OP_HFLIP

Flip (mirror) image horizontally. This transform is imperfect if there are any partial MCU blocks on the right edge.

See Also:

OPT_PERFECT, Constant Field Values

OP_VFLIP

public static final int OP_VFLIP

Flip (mirror) image vertically. This transform is imperfect if there are any partial MCU blocks on the bottom edge.

See Also:

OPT_PERFECT, Constant Field Values

OP_TRANSPOSE

public static final int OP_TRANSPOSE

Transpose image (flip/mirror along upper left to lower right axis). This transform is always perfect.

See Also:

OPT_PERFECT, Constant Field Values

OP_TRANSVERSE

public static final int OP_TRANSVERSE

Transverse transpose image (flip/mirror along upper right to lower left axis). This transform is imperfect if there are any partial MCU blocks in the image.

See Also:

OPT_PERFECT, Constant Field Values

OP_ROT90

public static final int OP_ROT90

Rotate image clockwise by 90 degrees. This transform is imperfect if there are any partial MCU blocks on the bottom edge.

See Also:

OPT_PERFECT, Constant Field Values

OP_ROT180

public static final int OP_ROT180

Rotate image 180 degrees. This transform is imperfect if there are any partial MCU blocks in the image.

See Also:

OPT_PERFECT, Constant Field Values

OP_ROT270

public static final int OP_ROT270

Rotate image counter-clockwise by 90 degrees. This transform is imperfect if there are any partial MCU blocks on the right edge.

See Also:

OPT_PERFECT, Constant Field Values

OPT_PERFECT

public static final int OPT_PERFECT

This option will cause TJTransformer.transform() to throw an exception if the transform is not perfect. Lossless transforms operate on MCU blocks, whose size depends on the level of chrominance subsampling used. If the image's width or height is not evenly divisible by the MCU block size (see TJ.getMCUWidth() and TJ.getMCUHeight()), then there will be partial MCU blocks on the right and/or bottom edges. It is not possible to move these partial MCU blocks to the top or left of the image, so any transform that would require that is "imperfect." If this option is not specified, then any partial MCU blocks that cannot be transformed will be left in place, which will create odd-looking strips on the right or bottom edge of the image.

See Also:

Constant Field Values

OPT_TRIM

public static final int OPT_TRIM

This option will discard any partial MCU blocks that cannot be transformed.

See Also:

Constant Field Values

OPT_CROP

public static final int OPT_CROP

This option will enable lossless cropping.

See Also:

Constant Field Values

OPT_GRAY

public static final int OPT_GRAY

This option will discard the color data in the source image and produce a grayscale destination image.

See Also:

Constant Field Values

OPT_NOOUTPUT

public static final int OPT_NOOUTPUT

This option will prevent TJTransformer.transform() from outputting a JPEG image for this particular transform. This can be used in conjunction with a custom filter to capture the transformed DCT coefficients without transcoding them.

See Also:

Constant Field Values

OPT_PROGRESSIVE

public static final int OPT_PROGRESSIVE

This option will enable progressive entropy coding in the JPEG image generated by this particular transform. Progressive entropy coding will generally improve compression relative to baseline entropy coding (the default), but it will reduce decompression performance considerably. Can be combined with OPT_ARITHMETIC. Implies OPT_OPTIMIZE unless OPT_ARITHMETIC is also specified.

See Also:

Constant Field Values

OPT_COPYNONE

public static final int OPT_COPYNONE

This option will prevent TJTransformer.transform() from copying any extra markers (including EXIF and ICC profile data) from the source image to the destination image.

See Also:

Constant Field Values

OPT_ARITHMETIC

public static final int OPT_ARITHMETIC

This option will enable arithmetic entropy coding in the JPEG image generated by this particular transform. Arithmetic entropy coding will generally improve compression relative to Huffman entropy coding (the default), but it will reduce decompression performance considerably. Can be combined with OPT_PROGRESSIVE.

See Also:

Constant Field Values

OPT_OPTIMIZE

public static final int OPT_OPTIMIZE

This option will enable optimized baseline entropy coding in the JPEG image generated by this particular transform. Optimized baseline entropy coding will improve compression slightly (generally 5% or less.)

See Also:

Constant Field Values

op

public int op

Transform operation (one of OP_*)

options

public int options

Transform options (bitwise OR of one or more of OPT_*)

cf

public TJCustomFilter cf

Custom filter instance

Constructor Detail

TJTransform

public TJTransform()

Create a new lossless transform instance.

TJTransform

public TJTransform(int x,
                   int y,
                   int w,
                   int h,
                   int op,
                   int options,
                   TJCustomFilter cf)

Create a new lossless transform instance with the given parameters.

Parameters:

x - the left boundary of the cropping region. This must be evenly divisible by the MCU block width (see TJ.getMCUWidth())

y - the upper boundary of the cropping region. This must be evenly divisible by the MCU block height (see TJ.getMCUHeight())

w - the width of the cropping region. Setting this to 0 is the equivalent of setting it to (width of the source JPEG image - x).

h - the height of the cropping region. Setting this to 0 is the equivalent of setting it to (height of the source JPEG image - y).

op - one of the transform operations (OP_*)

options - the bitwise OR of one or more of the transform options (OPT_*)

cf - an instance of an object that implements the TJCustomFilter interface, or null if no custom filter is needed

TJTransform

public TJTransform(java.awt.Rectangle r,
                   int op,
                   int options,
                   TJCustomFilter cf)

Create a new lossless transform instance with the given parameters.

Parameters:

r - a java.awt.Rectangle instance that specifies the cropping region. See TJTransform(int, int, int, int, int, int, TJCustomFilter) for more details.

op - one of the transform operations (OP_*)

options - the bitwise OR of one or more of the transform options (OPT_*)

cf - an instance of an object that implements the TJCustomFilter interface, or null if no custom filter is needed