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mozjpeg/java/doc/org/libjpegturbo/turbojpeg/TJTransformer.html
DRC df9dbff830 TurboJPEG: New param to limit virt array mem usage 
This corresponds to max_memory_to_use in the jpeg_memory_mgr struct in
the libjpeg API, except that the TurboJPEG parameter is specified in
megabytes.  Because this is 2023 and computers with less than 1 MB of
memory are not a thing (at least not within the scope of libjpeg-turbo
support), it isn't useful to allow a limit less than 1 MB to be
specified.  Furthermore, because TurboJPEG parameters are signed
integers, if we allowed the memory limit to be specified in bytes, then
it would be impossible to specify a limit larger than 2 GB on 64-bit
machines.  Because max_memory_to_use is a long signed integer,
effectively we can specify a limit of up to 2 petabytes on 64-bit
machines if the TurboJPEG parameter is specified in megabytes.  (2 PB
should be enough for anybody, right?)

This commit also bumps the TurboJPEG API version to 3.0.1.  Since the
TurboJPEG API version no longer tracks the libjpeg-turbo version, it
makes sense to increment the API revision number when adding constants,
to increment the minor version number when adding functions, and to
increment the major version number for a complete overhaul.

This commit also removes the vestigial TJ_NUMPARAM macro, which was
never defined because it proved unnecessary.

Partially implements #735
2023-11-14 10:19:06 -05:00

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<div class="subTitle"><span class="packageLabelInType">Package</span>&nbsp;<a href="package-summary.html">org.libjpegturbo.turbojpeg</a></div>
<h2 title="Class TJTransformer" class="title">Class TJTransformer</h2>
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<ul class="inheritance">
<li>java.lang.Object</li>
<li>
<ul class="inheritance">
<li><a href="TJDecompressor.html" title="class in org.libjpegturbo.turbojpeg">org.libjpegturbo.turbojpeg.TJDecompressor</a></li>
<li>
<ul class="inheritance">
<li>org.libjpegturbo.turbojpeg.TJTransformer</li>
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<pre>public class <span class="typeNameLabel">TJTransformer</span>
extends <a href="TJDecompressor.html" title="class in org.libjpegturbo.turbojpeg">TJDecompressor</a></pre>
<div class="block">TurboJPEG lossless transformer</div>
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<th class="colFirst" scope="col">Constructor</th>
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<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E()">TJTransformer</a></span>()</code></th>
<td class="colLast">
<div class="block">Create a TurboJPEG lossless transformer instance.</div>
</td>
</tr>
<tr class="rowColor">
<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(byte%5B%5D)">TJTransformer</a></span>&#8203;(byte[]&nbsp;jpegImage)</code></th>
<td class="colLast">
<div class="block">Create a TurboJPEG lossless transformer instance and associate the JPEG
source image stored in <code>jpegImage</code> with the newly created
instance.</div>
</td>
</tr>
<tr class="altColor">
<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(byte%5B%5D,int)">TJTransformer</a></span>&#8203;(byte[]&nbsp;jpegImage,
int&nbsp;imageSize)</code></th>
<td class="colLast">
<div class="block">Create a TurboJPEG lossless transformer instance and associate the JPEG
source image of length <code>imageSize</code> bytes stored in
<code>jpegImage</code> with the newly created instance.</div>
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</tr>
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<td class="colFirst"><code>int[]</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getTransformedSizes()">getTransformedSizes</a></span>()</code></th>
<td class="colLast">
<div class="block">Returns an array containing the sizes of the transformed JPEG images
(in bytes) generated by the most recent transform operation.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#transform(byte%5B%5D%5B%5D,org.libjpegturbo.turbojpeg.TJTransform%5B%5D)">transform</a></span>&#8203;(byte[][]&nbsp;dstBufs,
<a href="TJTransform.html" title="class in org.libjpegturbo.turbojpeg">TJTransform</a>[]&nbsp;transforms)</code></th>
<td class="colLast">
<div class="block">Losslessly transform the JPEG source image associated with this
transformer instance into one or more JPEG images stored in the given
destination buffers.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#transform(byte%5B%5D%5B%5D,org.libjpegturbo.turbojpeg.TJTransform%5B%5D,int)">transform</a></span>&#8203;(byte[][]&nbsp;dstBufs,
<a href="TJTransform.html" title="class in org.libjpegturbo.turbojpeg">TJTransform</a>[]&nbsp;transforms,
int&nbsp;flags)</code></th>
<td class="colLast">
<div class="block"><span class="deprecatedLabel">Deprecated.</span>
<div class="deprecationComment">Use <a href="TJDecompressor.html#set(int,int)"><code>TJDecompressor.set()</code></a> and
<a href="#transform(byte%5B%5D%5B%5D,org.libjpegturbo.turbojpeg.TJTransform%5B%5D)"><code>transform(byte[][], TJTransform[])</code></a> instead.</div>
</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code><a href="TJDecompressor.html" title="class in org.libjpegturbo.turbojpeg">TJDecompressor</a>[]</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#transform(org.libjpegturbo.turbojpeg.TJTransform%5B%5D)">transform</a></span>&#8203;(<a href="TJTransform.html" title="class in org.libjpegturbo.turbojpeg">TJTransform</a>[]&nbsp;transforms)</code></th>
<td class="colLast">
<div class="block">Losslessly transform the JPEG source image associated with this
transformer instance and return an array of <a href="TJDecompressor.html" title="class in org.libjpegturbo.turbojpeg"><code>TJDecompressor</code></a>
instances, each of which has a transformed JPEG image associated with it.</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code><a href="TJDecompressor.html" title="class in org.libjpegturbo.turbojpeg">TJDecompressor</a>[]</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#transform(org.libjpegturbo.turbojpeg.TJTransform%5B%5D,int)">transform</a></span>&#8203;(<a href="TJTransform.html" title="class in org.libjpegturbo.turbojpeg">TJTransform</a>[]&nbsp;transforms,
int&nbsp;flags)</code></th>
<td class="colLast">
<div class="block"><span class="deprecatedLabel">Deprecated.</span>
<div class="deprecationComment">Use <a href="TJDecompressor.html#set(int,int)"><code>TJDecompressor.set()</code></a> and
<a href="#transform(org.libjpegturbo.turbojpeg.TJTransform%5B%5D)"><code>transform(TJTransform[])</code></a> instead.</div>
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<h3>Methods inherited from class&nbsp;org.libjpegturbo.turbojpeg.<a href="TJDecompressor.html" title="class in org.libjpegturbo.turbojpeg">TJDecompressor</a></h3>
<code><a href="TJDecompressor.html#close()">close</a>, <a href="TJDecompressor.html#decompress(byte%5B%5D,int,int,int,int,int,int,int)">decompress</a>, <a href="TJDecompressor.html#decompress(int%5B%5D,int,int,int,int,int,int,int)">decompress</a>, <a href="TJDecompressor.html#decompress(int,int,int,int)">decompress</a>, <a href="TJDecompressor.html#decompress(int,int,int,int,int)">decompress</a>, <a href="TJDecompressor.html#decompress(java.awt.image.BufferedImage,int)">decompress</a>, <a href="TJDecompressor.html#decompress12(int,int)">decompress12</a>, <a href="TJDecompressor.html#decompress12(short%5B%5D,int,int,int,int)">decompress12</a>, <a href="TJDecompressor.html#decompress16(int,int)">decompress16</a>, <a href="TJDecompressor.html#decompress16(short%5B%5D,int,int,int,int)">decompress16</a>, <a href="TJDecompressor.html#decompress8(byte%5B%5D,int,int,int,int)">decompress8</a>, <a href="TJDecompressor.html#decompress8(int)">decompress8</a>, <a href="TJDecompressor.html#decompress8(int%5B%5D,int,int,int,int)">decompress8</a>, <a href="TJDecompressor.html#decompress8(int,int)">decompress8</a>, <a href="TJDecompressor.html#decompress8(java.awt.image.BufferedImage)">decompress8</a>, <a href="TJDecompressor.html#decompressToYUV(int)">decompressToYUV</a>, <a href="TJDecompressor.html#decompressToYUV(int%5B%5D)">decompressToYUV</a>, <a href="TJDecompressor.html#decompressToYUV(int,int%5B%5D,int,int)">decompressToYUV</a>, <a href="TJDecompressor.html#decompressToYUV(int,int,int,int)">decompressToYUV</a>, <a href="TJDecompressor.html#decompressToYUV(org.libjpegturbo.turbojpeg.YUVImage)">decompressToYUV</a>, <a href="TJDecompressor.html#decompressToYUV(org.libjpegturbo.turbojpeg.YUVImage,int)">decompressToYUV</a>, <a href="TJDecompressor.html#finalize()">finalize</a>, <a href="TJDecompressor.html#get(int)">get</a>, <a href="TJDecompressor.html#getColorspace()">getColorspace</a>, <a href="TJDecompressor.html#getHeight()">getHeight</a>, <a href="TJDecompressor.html#getJPEGBuf()">getJPEGBuf</a>, <a href="TJDecompressor.html#getJPEGSize()">getJPEGSize</a>, <a href="TJDecompressor.html#getScaledHeight(int,int)">getScaledHeight</a>, <a href="TJDecompressor.html#getScaledWidth(int,int)">getScaledWidth</a>, <a href="TJDecompressor.html#getSubsamp()">getSubsamp</a>, <a href="TJDecompressor.html#getWidth()">getWidth</a>, <a href="TJDecompressor.html#set(int,int)">set</a>, <a href="TJDecompressor.html#setCroppingRegion(java.awt.Rectangle)">setCroppingRegion</a>, <a href="TJDecompressor.html#setScalingFactor(org.libjpegturbo.turbojpeg.TJScalingFactor)">setScalingFactor</a>, <a href="TJDecompressor.html#setSourceImage(byte%5B%5D,int)">setSourceImage</a>, <a href="TJDecompressor.html#setSourceImage(org.libjpegturbo.turbojpeg.YUVImage)">setSourceImage</a></code></li>
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<h3>Methods inherited from class&nbsp;java.lang.Object</h3>
<code>clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li>
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<h4>TJTransformer</h4>
<pre>public&nbsp;TJTransformer()
throws <a href="TJException.html" title="class in org.libjpegturbo.turbojpeg">TJException</a></pre>
<div class="block">Create a TurboJPEG lossless transformer instance.</div>
<dl>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="TJException.html" title="class in org.libjpegturbo.turbojpeg">TJException</a></code></dd>
</dl>
</li>
</ul>
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<h4>TJTransformer</h4>
<pre>public&nbsp;TJTransformer&#8203;(byte[]&nbsp;jpegImage)
throws <a href="TJException.html" title="class in org.libjpegturbo.turbojpeg">TJException</a></pre>
<div class="block">Create a TurboJPEG lossless transformer instance and associate the JPEG
source image stored in <code>jpegImage</code> with the newly created
instance.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>jpegImage</code> - 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.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="TJException.html" title="class in org.libjpegturbo.turbojpeg">TJException</a></code></dd>
</dl>
</li>
</ul>
<a id="&lt;init&gt;(byte[],int)">
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<h4>TJTransformer</h4>
<pre>public&nbsp;TJTransformer&#8203;(byte[]&nbsp;jpegImage,
int&nbsp;imageSize)
throws <a href="TJException.html" title="class in org.libjpegturbo.turbojpeg">TJException</a></pre>
<div class="block">Create a TurboJPEG lossless transformer instance and associate the JPEG
source image of length <code>imageSize</code> bytes stored in
<code>jpegImage</code> with the newly created instance.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>jpegImage</code> - buffer containing the JPEG source image to transform.
This buffer is not modified.</dd>
<dd><code>imageSize</code> - size of the JPEG source image (in bytes)</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="TJException.html" title="class in org.libjpegturbo.turbojpeg">TJException</a></code></dd>
</dl>
</li>
</ul>
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<a id="transform(byte[][],org.libjpegturbo.turbojpeg.TJTransform[])">
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<h4>transform</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;transform&#8203;(byte[][]&nbsp;dstBufs,
<a href="TJTransform.html" title="class in org.libjpegturbo.turbojpeg">TJTransform</a>[]&nbsp;transforms)
throws <a href="TJException.html" title="class in org.libjpegturbo.turbojpeg">TJException</a></pre>
<div class="block">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.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>dstBufs</code> - an array of JPEG destination buffers.
<code>dstbufs[i]</code> will receive a JPEG image that has been
transformed using the parameters in <code>transforms[i]</code>. Use
<a href="TJ.html#bufSize(int,int,int)"><code>TJ.bufSize()</code></a> 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.</dd>
<dd><code>transforms</code> - an array of <a href="TJTransform.html" title="class in org.libjpegturbo.turbojpeg"><code>TJTransform</code></a> instances, each of
which specifies the transform parameters and/or cropping region for the
corresponding transformed JPEG image</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="TJException.html" title="class in org.libjpegturbo.turbojpeg">TJException</a></code></dd>
</dl>
</li>
</ul>
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<h4>transform</h4>
<pre class="methodSignature">@Deprecated
public&nbsp;void&nbsp;transform&#8203;(byte[][]&nbsp;dstBufs,
<a href="TJTransform.html" title="class in org.libjpegturbo.turbojpeg">TJTransform</a>[]&nbsp;transforms,
int&nbsp;flags)
throws <a href="TJException.html" title="class in org.libjpegturbo.turbojpeg">TJException</a></pre>
<div class="deprecationBlock"><span class="deprecatedLabel">Deprecated.</span>
<div class="deprecationComment">Use <a href="TJDecompressor.html#set(int,int)"><code>TJDecompressor.set()</code></a> and
<a href="#transform(byte%5B%5D%5B%5D,org.libjpegturbo.turbojpeg.TJTransform%5B%5D)"><code>transform(byte[][], TJTransform[])</code></a> instead.</div>
</div>
<dl>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="TJException.html" title="class in org.libjpegturbo.turbojpeg">TJException</a></code></dd>
</dl>
</li>
</ul>
<a id="transform(org.libjpegturbo.turbojpeg.TJTransform[])">
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<ul class="blockList">
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<h4>transform</h4>
<pre class="methodSignature">public&nbsp;<a href="TJDecompressor.html" title="class in org.libjpegturbo.turbojpeg">TJDecompressor</a>[]&nbsp;transform&#8203;(<a href="TJTransform.html" title="class in org.libjpegturbo.turbojpeg">TJTransform</a>[]&nbsp;transforms)
throws <a href="TJException.html" title="class in org.libjpegturbo.turbojpeg">TJException</a></pre>
<div class="block">Losslessly transform the JPEG source image associated with this
transformer instance and return an array of <a href="TJDecompressor.html" title="class in org.libjpegturbo.turbojpeg"><code>TJDecompressor</code></a>
instances, each of which has a transformed JPEG image associated with it.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>transforms</code> - an array of <a href="TJTransform.html" title="class in org.libjpegturbo.turbojpeg"><code>TJTransform</code></a> instances, each of
which specifies the transform parameters and/or cropping region for the
corresponding transformed JPEG image</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>an array of <a href="TJDecompressor.html" title="class in org.libjpegturbo.turbojpeg"><code>TJDecompressor</code></a> instances, each of
which has a transformed JPEG image associated with it.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="TJException.html" title="class in org.libjpegturbo.turbojpeg">TJException</a></code></dd>
</dl>
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</ul>
<a id="transform(org.libjpegturbo.turbojpeg.TJTransform[],int)">
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<h4>transform</h4>
<pre class="methodSignature">@Deprecated
public&nbsp;<a href="TJDecompressor.html" title="class in org.libjpegturbo.turbojpeg">TJDecompressor</a>[]&nbsp;transform&#8203;(<a href="TJTransform.html" title="class in org.libjpegturbo.turbojpeg">TJTransform</a>[]&nbsp;transforms,
int&nbsp;flags)
throws <a href="TJException.html" title="class in org.libjpegturbo.turbojpeg">TJException</a></pre>
<div class="deprecationBlock"><span class="deprecatedLabel">Deprecated.</span>
<div class="deprecationComment">Use <a href="TJDecompressor.html#set(int,int)"><code>TJDecompressor.set()</code></a> and
<a href="#transform(org.libjpegturbo.turbojpeg.TJTransform%5B%5D)"><code>transform(TJTransform[])</code></a> instead.</div>
</div>
<dl>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="TJException.html" title="class in org.libjpegturbo.turbojpeg">TJException</a></code></dd>
</dl>
</li>
</ul>
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<h4>getTransformedSizes</h4>
<pre class="methodSignature">public&nbsp;int[]&nbsp;getTransformedSizes()</pre>
<div class="block">Returns an array containing the sizes of the transformed JPEG images
(in bytes) generated by the most recent transform operation.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>an array containing the sizes of the transformed JPEG images
(in bytes) generated by the most recent transform operation.</dd>
</dl>
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