Package com.applitools.utils

Class ImageDeltaCompressor

java.lang.Object

com.applitools.utils.ImageDeltaCompressor

public class ImageDeltaCompressor
extends Object

Provides image compression based on delta between consecutive images.

Constructor Summary

Constructors

Constructor	Description
ImageDeltaCompressor()

Method Summary

Modifier and Type	Method	Description
static byte[]	compressByRawBlocks(BufferedImage target, byte[] targetEncoded, BufferedImage source)	Compresses a target image based on a difference from a source image.
static byte[]	compressByRawBlocks(BufferedImage target, byte[] targetEncoded, BufferedImage source, int blockSize)	Compresses a target image based on a difference from a source image.

Methods inherited from class java.lang.Object

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

Constructor Detail

ImageDeltaCompressor

public ImageDeltaCompressor()

Method Detail

compressByRawBlocks

public static byte[] compressByRawBlocks(BufferedImage target,
                                         byte[] targetEncoded,
                                         BufferedImage source,
                                         int blockSize)
                                  throws IOException

Compresses a target image based on a difference from a source image.

Parameters:

target - The image we want to compress. (type is TYPE_4BYTE_ABGR)

targetEncoded - The image we want to compress in its png bytes representation.

source - The baseline image by which a compression will be performed. (type is TYPE_4BYTE_ABGR)

blockSize - How many pixels per block.

Returns:

The compression result, or the targetEncoded if the compressed bytes count is greater than the uncompressed bytes count.

Throws:

IOException - If there was a problem reading/writing from/to the streams which are created during the process.

compressByRawBlocks

public static byte[] compressByRawBlocks(BufferedImage target,
                                         byte[] targetEncoded,
                                         BufferedImage source)
                                  throws IOException

Compresses a target image based on a difference from a source image. blockSize defaults to 10.

Parameters:

target - The image we want to compress.

targetEncoded - The image we want to compress in its png bytes representation.

source - The baseline image by which a compression will be performed.

Returns:

The compression result.

Throws:

IOException - If there was a problem reading/writing from/to the streams which are created during the process.