96bc40c1b3
This actually works and apparently always has worked. It only failed because the libjpeg code, which did not originally support arithmetic coding, assumed that optimize_coding should always be TRUE for 12-bit data precision.
248 lines
9.3 KiB
Java
248 lines
9.3 KiB
Java
/*
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* Copyright (C)2011, 2013, 2018, 2022-2023 D. R. Commander.
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* All Rights Reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* - Neither the name of the libjpeg-turbo Project nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS",
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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package org.libjpegturbo.turbojpeg;
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import java.awt.*;
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/**
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* Lossless transform parameters
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*/
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public class TJTransform extends Rectangle {
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private static final long serialVersionUID = -127367705761430371L;
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/**
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* The number of lossless transform operations
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*/
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public static final int NUMOP = 8;
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/**
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* Do not transform the position of the image pixels.
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*/
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public static final int OP_NONE = 0;
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/**
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* Flip (mirror) image horizontally. This transform is imperfect if there
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* are any partial MCU blocks on the right edge.
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* @see #OPT_PERFECT
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*/
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public static final int OP_HFLIP = 1;
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/**
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* Flip (mirror) image vertically. This transform is imperfect if there are
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* any partial MCU blocks on the bottom edge.
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* @see #OPT_PERFECT
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*/
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public static final int OP_VFLIP = 2;
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/**
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* Transpose image (flip/mirror along upper left to lower right axis). This
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* transform is always perfect.
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* @see #OPT_PERFECT
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*/
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public static final int OP_TRANSPOSE = 3;
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/**
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* Transverse transpose image (flip/mirror along upper right to lower left
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* axis). This transform is imperfect if there are any partial MCU blocks in
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* the image.
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* @see #OPT_PERFECT
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*/
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public static final int OP_TRANSVERSE = 4;
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/**
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* Rotate image clockwise by 90 degrees. This transform is imperfect if
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* there are any partial MCU blocks on the bottom edge.
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* @see #OPT_PERFECT
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*/
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public static final int OP_ROT90 = 5;
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/**
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* Rotate image 180 degrees. This transform is imperfect if there are any
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* partial MCU blocks in the image.
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* @see #OPT_PERFECT
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*/
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public static final int OP_ROT180 = 6;
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/**
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* Rotate image counter-clockwise by 90 degrees. This transform is imperfect
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* if there are any partial MCU blocks on the right edge.
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* @see #OPT_PERFECT
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*/
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public static final int OP_ROT270 = 7;
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/**
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* This option will cause {@link TJTransformer#transform
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* TJTransformer.transform()} to throw an exception if the transform is not
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* perfect. Lossless transforms operate on MCU blocks, whose size depends on
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* the level of chrominance subsampling used. If the image's width or height
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* is not evenly divisible by the MCU block size (see {@link TJ#getMCUWidth
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* TJ.getMCUWidth()} and {@link TJ#getMCUHeight TJ.getMCUHeight()}), then
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* there will be partial MCU blocks on the right and/or bottom edges. It is
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* not possible to move these partial MCU blocks to the top or left of the
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* image, so any transform that would require that is "imperfect." If this
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* option is not specified, then any partial MCU blocks that cannot be
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* transformed will be left in place, which will create odd-looking strips on
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* the right or bottom edge of the image.
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*/
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public static final int OPT_PERFECT = (1 << 0);
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/**
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* This option will discard any partial MCU blocks that cannot be
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* transformed.
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*/
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public static final int OPT_TRIM = (1 << 1);
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/**
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* This option will enable lossless cropping.
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*/
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public static final int OPT_CROP = (1 << 2);
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/**
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* This option will discard the color data in the source image and produce a
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* grayscale destination image.
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*/
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public static final int OPT_GRAY = (1 << 3);
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/**
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* This option will prevent {@link TJTransformer#transform
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* TJTransformer.transform()} from outputting a JPEG image for this
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* particular transform. This can be used in conjunction with a custom
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* filter to capture the transformed DCT coefficients without transcoding
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* them.
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*/
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public static final int OPT_NOOUTPUT = (1 << 4);
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/**
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* This option will enable progressive entropy coding in the JPEG image
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* generated by this particular transform. Progressive entropy coding will
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* generally improve compression relative to baseline entropy coding (the
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* default), but it will reduce decompression performance considerably.
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* Can be combined with {@link #OPT_ARITHMETIC}. Implies
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* {@link #OPT_OPTIMIZE} unless {@link #OPT_ARITHMETIC} is also specified.
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*/
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public static final int OPT_PROGRESSIVE = (1 << 5);
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/**
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* This option will prevent {@link TJTransformer#transform
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* TJTransformer.transform()} from copying any extra markers (including EXIF
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* and ICC profile data) from the source image to the destination image.
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*/
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public static final int OPT_COPYNONE = (1 << 6);
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/**
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* This option will enable arithmetic entropy coding in the JPEG image
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* generated by this particular transform. Arithmetic entropy coding will
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* generally improve compression relative to Huffman entropy coding (the
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* default), but it will reduce decompression performance considerably. Can
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* be combined with {@link #OPT_PROGRESSIVE}.
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*/
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public static final int OPT_ARITHMETIC = (1 << 7);
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/**
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* This option will enable optimized baseline entropy coding in the JPEG
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* image generated by this particular transform. Optimized baseline entropy
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* coding will improve compression slightly (generally 5% or less.)
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*/
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public static final int OPT_OPTIMIZE = (1 << 8);
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/**
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* Create a new lossless transform instance.
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*/
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public TJTransform() {
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}
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/**
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* Create a new lossless transform instance with the given parameters.
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*
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* @param x the left boundary of the cropping region. This must be evenly
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* divisible by the MCU block width (see {@link TJ#getMCUWidth
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* TJ.getMCUWidth()})
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*
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* @param y the upper boundary of the cropping region. This must be evenly
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* divisible by the MCU block height (see {@link TJ#getMCUHeight
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* TJ.getMCUHeight()})
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*
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* @param w the width of the cropping region. Setting this to 0 is the
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* equivalent of setting it to (width of the source JPEG image -
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* <code>x</code>).
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*
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* @param h the height of the cropping region. Setting this to 0 is the
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* equivalent of setting it to (height of the source JPEG image -
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* <code>y</code>).
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*
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* @param op one of the transform operations ({@link #OP_NONE OP_*})
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*
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* @param options the bitwise OR of one or more of the transform options
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* ({@link #OPT_PERFECT OPT_*})
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*
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* @param cf an instance of an object that implements the
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* {@link TJCustomFilter} interface, or null if no custom filter is needed
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*/
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@SuppressWarnings("checkstyle:HiddenField")
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public TJTransform(int x, int y, int w, int h, int op, int options,
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TJCustomFilter cf) {
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super(x, y, w, h);
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this.op = op;
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this.options = options;
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this.cf = cf;
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}
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/**
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* Create a new lossless transform instance with the given parameters.
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*
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* @param r a <code>java.awt.Rectangle</code> instance that specifies the
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* cropping region. See
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* {@link #TJTransform(int, int, int, int, int, int, TJCustomFilter)} for
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* more details.
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*
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* @param op one of the transform operations ({@link #OP_NONE OP_*})
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*
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* @param options the bitwise OR of one or more of the transform options
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* ({@link #OPT_PERFECT OPT_*})
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*
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* @param cf an instance of an object that implements the
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* {@link TJCustomFilter} interface, or null if no custom filter is needed
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*/
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@SuppressWarnings("checkstyle:HiddenField")
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public TJTransform(Rectangle r, int op, int options,
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TJCustomFilter cf) {
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super(r);
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this.op = op;
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this.options = options;
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this.cf = cf;
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}
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/**
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* Transform operation (one of {@link #OP_NONE OP_*})
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*/
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@SuppressWarnings("checkstyle:VisibilityModifier")
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public int op = 0;
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/**
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* Transform options (bitwise OR of one or more of
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* {@link #OPT_PERFECT OPT_*})
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*/
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@SuppressWarnings("checkstyle:VisibilityModifier")
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public int options = 0;
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/**
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* Custom filter instance
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*/
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@SuppressWarnings("checkstyle:VisibilityModifier")
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public TJCustomFilter cf = null;
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}
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