Package org.libjpegturbo.turbojpeg
Class TJTransformer
- java.lang.Object
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- org.libjpegturbo.turbojpeg.TJDecompressor
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- org.libjpegturbo.turbojpeg.TJTransformer
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- All Implemented Interfaces:
java.io.Closeable
,java.lang.AutoCloseable
public class TJTransformer extends TJDecompressor
TurboJPEG lossless transformer
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Constructor Summary
Constructors Constructor Description TJTransformer()
Create a TurboJPEG lossless transformer instance.TJTransformer(byte[] jpegImage)
Create a TurboJPEG lossless transformer instance and associate the JPEG source image stored injpegImage
with the newly created instance.TJTransformer(byte[] jpegImage, int imageSize)
Create a TurboJPEG lossless transformer instance and associate the JPEG source image of lengthimageSize
bytes stored injpegImage
with the newly created instance.
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Method Summary
All Methods Instance Methods Concrete Methods Deprecated Methods Modifier and Type Method Description int[]
getTransformedSizes()
Returns an array containing the sizes of the transformed JPEG images (in bytes) generated by the most recent transform operation.void
transform(byte[][] dstBufs, TJTransform[] transforms)
Losslessly transform the JPEG source image associated with this transformer instance into one or more JPEG images stored in the given destination buffers.void
transform(byte[][] dstBufs, TJTransform[] transforms, int flags)
Deprecated.UseTJDecompressor.set()
andtransform(byte[][], TJTransform[])
instead.TJDecompressor[]
transform(TJTransform[] transforms)
Losslessly transform the JPEG source image associated with this transformer instance and return an array ofTJDecompressor
instances, each of which has a transformed JPEG image associated with it.TJDecompressor[]
transform(TJTransform[] transforms, int flags)
Deprecated.UseTJDecompressor.set()
andtransform(TJTransform[])
instead.-
Methods inherited from class org.libjpegturbo.turbojpeg.TJDecompressor
close, decompress, decompress, decompress, decompress, decompress, decompress12, decompress12, decompress16, decompress16, decompress8, decompress8, decompress8, decompress8, decompress8, decompressToYUV, decompressToYUV, decompressToYUV, decompressToYUV, decompressToYUV, decompressToYUV, finalize, get, getColorspace, getHeight, getJPEGBuf, getJPEGSize, getScaledHeight, getScaledWidth, getSubsamp, getWidth, set, setCroppingRegion, setScalingFactor, setSourceImage, setSourceImage
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Constructor Detail
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TJTransformer
public TJTransformer() throws TJException
Create a TurboJPEG lossless transformer instance.- Throws:
TJException
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TJTransformer
public TJTransformer(byte[] jpegImage) throws TJException
Create a TurboJPEG lossless transformer instance and associate the JPEG source image stored injpegImage
with the newly created instance.- Parameters:
jpegImage
- buffer containing the JPEG source image to transform. (The size of the JPEG image is assumed to be the length of the array.) This buffer is not modified.- Throws:
TJException
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TJTransformer
public TJTransformer(byte[] jpegImage, int imageSize) throws TJException
Create a TurboJPEG lossless transformer instance and associate the JPEG source image of lengthimageSize
bytes stored injpegImage
with the newly created instance.- Parameters:
jpegImage
- buffer containing the JPEG source image to transform. This buffer is not modified.imageSize
- size of the JPEG source image (in bytes)- Throws:
TJException
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Method Detail
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transform
public void transform(byte[][] dstBufs, TJTransform[] transforms) throws TJException
Losslessly transform the JPEG source image associated with this transformer instance into one or more JPEG images stored in the given destination buffers. Lossless transforms work by moving the raw coefficients from one JPEG image structure to another without altering the values of the coefficients. While this is typically faster than decompressing the image, transforming it, and re-compressing it, lossless transforms are not free. Each lossless transform requires reading and performing Huffman decoding on all of the coefficients in the source image, regardless of the size of the destination image. Thus, this method provides a means of generating multiple transformed images from the same source or of applying multiple transformations simultaneously, in order to eliminate the need to read the source coefficients multiple times.- Parameters:
dstBufs
- an array of JPEG destination buffers.dstbufs[i]
will receive a JPEG image that has been transformed using the parameters intransforms[i]
. UseTJ.bufSize()
to determine the maximum size for each buffer based on the transformed or cropped width and height and the level of subsampling used in the source image.transforms
- an array ofTJTransform
instances, each of which specifies the transform parameters and/or cropping region for the corresponding transformed JPEG image- Throws:
TJException
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transform
@Deprecated public void transform(byte[][] dstBufs, TJTransform[] transforms, int flags) throws TJException
Deprecated.UseTJDecompressor.set()
andtransform(byte[][], TJTransform[])
instead.- Throws:
TJException
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transform
public TJDecompressor[] transform(TJTransform[] transforms) throws TJException
Losslessly transform the JPEG source image associated with this transformer instance and return an array ofTJDecompressor
instances, each of which has a transformed JPEG image associated with it.- Parameters:
transforms
- an array ofTJTransform
instances, each of which specifies the transform parameters and/or cropping region for the corresponding transformed JPEG image- Returns:
- an array of
TJDecompressor
instances, each of which has a transformed JPEG image associated with it. - Throws:
TJException
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transform
@Deprecated public TJDecompressor[] transform(TJTransform[] transforms, int flags) throws TJException
Deprecated.UseTJDecompressor.set()
andtransform(TJTransform[])
instead.- Throws:
TJException
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getTransformedSizes
public int[] getTransformedSizes()
Returns an array containing the sizes of the transformed JPEG images (in bytes) generated by the most recent transform operation.- Returns:
- an array containing the sizes of the transformed JPEG images (in bytes) generated by the most recent transform operation.
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