Package com.twelvemonkeys.imageio.path

Class Paths

java.lang.Object

com.twelvemonkeys.imageio.path.Paths

public final class Paths
extends java.lang.Object

Support for various Adobe Photoshop Path related operations:

• Extract a path from an image input stream, readPath(javax.imageio.stream.ImageInputStream)
• Apply a given path to a given BufferedImage applyClippingPath(java.awt.Shape, java.awt.image.BufferedImage)
• Read an image with path applied readClipped(javax.imageio.stream.ImageInputStream)
• Write an image with embedded path writeClipped(java.awt.image.RenderedImage, java.awt.Shape, java.lang.String, javax.imageio.stream.ImageOutputStream)

Version:

$Id: Paths.java,v 1.0 08/12/14 harald.kuhr Exp$

See Also:

Adobe Photoshop Path resource format, AdobePathReader

Constructor Summary

Constructors

Modifier	Constructor	Description
private	Paths()

Method Summary

Modifier and Type	Method	Description
static java.awt.image.BufferedImage	applyClippingPath(java.awt.Shape clip, java.awt.image.BufferedImage image)	Applies the clipping path to the given image.
static java.awt.image.BufferedImage	applyClippingPath(java.awt.Shape clip, java.awt.image.BufferedImage image, java.awt.image.BufferedImage destination)	Applies the clipping path to the given image.
private static java.lang.String	arrayAsString(byte[] bytes)
static void	main(java.lang.String[] args)
static java.awt.image.BufferedImage	readClipped(javax.imageio.stream.ImageInputStream stream)	Reads the clipping path from the given input stream, if any, and applies it to the first image in the stream.
private static int	readMagic(javax.imageio.stream.ImageInputStream stream)
static java.awt.geom.Path2D	readPath(javax.imageio.stream.ImageInputStream stream)	Reads the clipping path from the given input stream, if any.
private static java.awt.geom.Path2D	readPathFromPhotoshopResources(javax.imageio.stream.ImageInputStream stream)
static boolean	writeClipped(java.awt.image.RenderedImage image, java.awt.Shape clipPath, java.lang.String formatName, javax.imageio.stream.ImageOutputStream output)	Writes the image along with a clipping path resource, in the given format, to the supplied output.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Paths

private Paths()

Method Detail

readPath

public static java.awt.geom.Path2D readPath(javax.imageio.stream.ImageInputStream stream)
                                     throws java.io.IOException

Reads the clipping path from the given input stream, if any. Supports PSD, JPEG and TIFF as container formats for Photoshop resources, or a "bare" PSD Image Resource Block.

Parameters:

stream - the input stream to read from, not null.

Returns:

the path, or null if no path is found

Throws:

java.io.IOException - if a general I/O exception occurs during reading.

javax.imageio.IIOException - if the input contains a bad path data.

java.lang.IllegalArgumentException - is stream is null.

See Also:

AdobePathReader

readMagic

private static int readMagic(javax.imageio.stream.ImageInputStream stream)
                      throws java.io.IOException

Throws:

java.io.IOException

readPathFromPhotoshopResources

private static java.awt.geom.Path2D readPathFromPhotoshopResources(javax.imageio.stream.ImageInputStream stream)
                                                            throws java.io.IOException

Throws:

java.io.IOException

applyClippingPath

public static java.awt.image.BufferedImage applyClippingPath(java.awt.Shape clip,
                                                             java.awt.image.BufferedImage image)

Applies the clipping path to the given image. All pixels outside the path will be transparent.

Parameters:

clip - the clipping path, not null

image - the image to clip, not null

Returns:

the clipped image.

Throws:

java.lang.IllegalArgumentException - if clip or image is null.

applyClippingPath

public static java.awt.image.BufferedImage applyClippingPath(java.awt.Shape clip,
                                                             java.awt.image.BufferedImage image,
                                                             java.awt.image.BufferedImage destination)

Applies the clipping path to the given image. Client code may decide the type of the destination image. The destination image is assumed to be fully transparent, and have same dimensions as image. All pixels outside the path will be transparent.

Parameters:

clip - the clipping path, not null.

image - the image to clip, not null.

destination - the destination image, may not be null or same instance as image.

Returns:

the clipped image.

Throws:

java.lang.IllegalArgumentException - if clip, image or destination is null, or if destination is the same instance as image.

readClipped

public static java.awt.image.BufferedImage readClipped(javax.imageio.stream.ImageInputStream stream)
                                                throws java.io.IOException

Reads the clipping path from the given input stream, if any, and applies it to the first image in the stream. If no path was found, the image is returned without any clipping. Supports PSD, JPEG and TIFF as container formats for Photoshop resources.

Parameters:

stream - the stream to read from, not null

Returns:

the clipped image

Throws:

java.io.IOException - if a general I/O exception occurs during reading.

javax.imageio.IIOException - if the input contains a bad image or path data.

java.lang.IllegalArgumentException - is stream is null.

writeClipped

public static boolean writeClipped(java.awt.image.RenderedImage image,
                                   java.awt.Shape clipPath,
                                   java.lang.String formatName,
                                   javax.imageio.stream.ImageOutputStream output)
                            throws java.io.IOException

Writes the image along with a clipping path resource, in the given format, to the supplied output. The image is written to the ImageOutputStream starting at the current stream pointer, overwriting existing stream data from that point forward, if present.

Note: As ImageIO.write(RenderedImage, String, ImageOutputStream), this method does not close the output stream. It is the responsibility of the caller to close the stream, if desired.

Implementation note: Only JPEG (using the "javax_imageio_jpeg_image_1.0" metadata format) and TIFF (using the "javax_imageio_tiff_image_1.0" or "com_sun_media_imageio_plugins_tiff_image_1.0" metadata formats) formats are currently supported.

Parameters:

image - the image to be written, may not be null.

clipPath - the clip path, may not be null.

formatName - the informal format name, may not be null.

output - the stream to write to, may not be null.

Returns:

true if the image was written, otherwise false (ie. no writer was found for the specified format).

Throws:

java.lang.IllegalArgumentException - if any parameter is null.

java.io.IOException - if an error occurs during writing.

arrayAsString

private static java.lang.String arrayAsString(byte[] bytes)

main

public static void main(java.lang.String[] args)
                 throws java.io.IOException,
                        java.lang.InterruptedException

Throws:

java.io.IOException

java.lang.InterruptedException