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<div class="subTitle">org.libjpegturbo.turbojpeg</div>
<h2 title="Class TJ" class="title">Class TJ</h2>
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<ul class="inheritance">
<li>java.lang.Object</li>
<li>
<ul class="inheritance">
<li>org.libjpegturbo.turbojpeg.TJ</li>
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<pre>public final class <span class="strong">TJ</span>
extends java.lang.Object</pre>
<div class="block">TurboJPEG utility class (cannot be instantiated)</div>
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<h3>Field Summary</h3>
<table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" summary="Field Summary table, listing fields, and an explanation">
<caption><span>Fields</span><span class="tabEnd"> </span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Field and Description</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#CS_CMYK">CS_CMYK</a></strong></code>
<div class="block">CMYK colorspace.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#CS_GRAY">CS_GRAY</a></strong></code>
<div class="block">Grayscale colorspace.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#CS_RGB">CS_RGB</a></strong></code>
<div class="block">RGB colorspace.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#CS_YCbCr">CS_YCbCr</a></strong></code>
<div class="block">YCbCr colorspace.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#CS_YCCK">CS_YCCK</a></strong></code>
<div class="block">YCCK colorspace.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#FLAG_ACCURATEDCT">FLAG_ACCURATEDCT</a></strong></code>
<div class="block">Use the most accurate DCT/IDCT algorithm available in the underlying
codec.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#FLAG_BOTTOMUP">FLAG_BOTTOMUP</a></strong></code>
<div class="block">The uncompressed source/destination image is stored in bottom-up (Windows,
OpenGL) order, not top-down (X11) order.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#FLAG_FASTDCT">FLAG_FASTDCT</a></strong></code>
<div class="block">Use the fastest DCT/IDCT algorithm available in the underlying codec.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#FLAG_FASTUPSAMPLE">FLAG_FASTUPSAMPLE</a></strong></code>
<div class="block">When decompressing an image that was compressed using chrominance
subsampling, use the fastest chrominance upsampling algorithm available in
the underlying codec.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#FLAG_FORCEMMX">FLAG_FORCEMMX</a></strong></code>
<div class="block"><strong>Deprecated.</strong> </div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#FLAG_FORCESSE">FLAG_FORCESSE</a></strong></code>
<div class="block"><strong>Deprecated.</strong> </div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#FLAG_FORCESSE2">FLAG_FORCESSE2</a></strong></code>
<div class="block"><strong>Deprecated.</strong> </div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#FLAG_FORCESSE3">FLAG_FORCESSE3</a></strong></code>
<div class="block"><strong>Deprecated.</strong> </div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#NUMCS">NUMCS</a></strong></code>
<div class="block">The number of JPEG colorspaces</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#NUMPF">NUMPF</a></strong></code>
<div class="block">The number of pixel formats</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#NUMSAMP">NUMSAMP</a></strong></code>
<div class="block">The number of chrominance subsampling options</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#PF_ABGR">PF_ABGR</a></strong></code>
<div class="block">ABGR pixel format.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#PF_ARGB">PF_ARGB</a></strong></code>
<div class="block">ARGB pixel format.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#PF_BGR">PF_BGR</a></strong></code>
<div class="block">BGR pixel format.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#PF_BGRA">PF_BGRA</a></strong></code>
<div class="block">BGRA pixel format.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#PF_BGRX">PF_BGRX</a></strong></code>
<div class="block">BGRX pixel format.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#PF_CMYK">PF_CMYK</a></strong></code>
<div class="block">CMYK pixel format.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#PF_GRAY">PF_GRAY</a></strong></code>
<div class="block">Grayscale pixel format.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#PF_RGB">PF_RGB</a></strong></code>
<div class="block">RGB pixel format.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#PF_RGBA">PF_RGBA</a></strong></code>
<div class="block">RGBA pixel format.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#PF_RGBX">PF_RGBX</a></strong></code>
<div class="block">RGBX pixel format.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#PF_XBGR">PF_XBGR</a></strong></code>
<div class="block">XBGR pixel format.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#PF_XRGB">PF_XRGB</a></strong></code>
<div class="block">XRGB pixel format.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#SAMP_411">SAMP_411</a></strong></code>
<div class="block">4:1:1 chrominance subsampling.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#SAMP_420">SAMP_420</a></strong></code>
<div class="block">4:2:0 chrominance subsampling.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#SAMP_422">SAMP_422</a></strong></code>
<div class="block">4:2:2 chrominance subsampling.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#SAMP_440">SAMP_440</a></strong></code>
<div class="block">4:4:0 chrominance subsampling.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#SAMP_444">SAMP_444</a></strong></code>
<div class="block">4:4:4 chrominance subsampling (no chrominance subsampling).</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#SAMP_GRAY">SAMP_GRAY</a></strong></code>
<div class="block">Grayscale.</div>
</td>
</tr>
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<h3>Constructor Summary</h3>
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<caption><span>Constructors</span><span class="tabEnd"> </span></caption>
<tr>
<th class="colOne" scope="col">Constructor and Description</th>
</tr>
<tr class="altColor">
<td class="colOne"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#TJ()">TJ</a></strong>()</code> </td>
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<h3>Method Summary</h3>
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<caption><span>Methods</span><span class="tabEnd"> </span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#bufSize(int,%20int,%20int)">bufSize</a></strong>(int width,
int height,
int jpegSubsamp)</code>
<div class="block">Returns the maximum size of the buffer (in bytes) required to hold a JPEG
image with the given width, height, and level of chrominance subsampling.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#bufSizeYUV(int,%20int,%20int)">bufSizeYUV</a></strong>(int width,
int height,
int subsamp)</code>
<div class="block"><strong>Deprecated.</strong>
<div class="block"><i>Use <a href="../../../org/libjpegturbo/turbojpeg/TJ.html#bufSizeYUV(int,%20int,%20int,%20int)"><code>bufSizeYUV(int, int, int, int)</code></a> instead.</i></div>
</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#bufSizeYUV(int,%20int,%20int,%20int)">bufSizeYUV</a></strong>(int width,
int pad,
int height,
int subsamp)</code>
<div class="block">Returns the size of the buffer (in bytes) required to hold a YUV planar
image with the given width, height, and level of chrominance subsampling.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#getBlueOffset(int)">getBlueOffset</a></strong>(int pixelFormat)</code>
<div class="block">For the given pixel format, returns the number of bytes that the blue
component is offset from the start of the pixel.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#getGreenOffset(int)">getGreenOffset</a></strong>(int pixelFormat)</code>
<div class="block">For the given pixel format, returns the number of bytes that the green
component is offset from the start of the pixel.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#getMCUHeight(int)">getMCUHeight</a></strong>(int subsamp)</code>
<div class="block">Returns the MCU block height for the given level of chrominance
subsampling.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#getMCUWidth(int)">getMCUWidth</a></strong>(int subsamp)</code>
<div class="block">Returns the MCU block width for the given level of chrominance
subsampling.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#getPixelSize(int)">getPixelSize</a></strong>(int pixelFormat)</code>
<div class="block">Returns the pixel size (in bytes) for the given pixel format.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#getRedOffset(int)">getRedOffset</a></strong>(int pixelFormat)</code>
<div class="block">For the given pixel format, returns the number of bytes that the red
component is offset from the start of the pixel.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static <a href="../../../org/libjpegturbo/turbojpeg/TJScalingFactor.html" title="class in org.libjpegturbo.turbojpeg">TJScalingFactor</a>[]</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#getScalingFactors()">getScalingFactors</a></strong>()</code>
<div class="block">Returns a list of fractional scaling factors that the JPEG decompressor in
this implementation of TurboJPEG supports.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#planeHeight(int,%20int,%20int)">planeHeight</a></strong>(int componentID,
int height,
int subsamp)</code>
<div class="block">Returns the plane height of a YUV image plane with the given parameters.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#planeSizeYUV(int,%20int,%20int,%20int,%20int)">planeSizeYUV</a></strong>(int componentID,
int width,
int stride,
int height,
int subsamp)</code>
<div class="block">Returns the size of the buffer (in bytes) required to hold a YUV image
plane with the given parameters.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#planeWidth(int,%20int,%20int)">planeWidth</a></strong>(int componentID,
int width,
int subsamp)</code>
<div class="block">Returns the plane width of a YUV image plane with the given parameters.</div>
</td>
</tr>
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<h3>Methods inherited from class java.lang.Object</h3>
<code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li>
</ul>
</li>
</ul>
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<h3>Field Detail</h3>
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<h4>NUMSAMP</h4>
<pre>public static final int NUMSAMP</pre>
<div class="block">The number of chrominance subsampling options</div>
<dl><dt><span class="strong">See Also:</span></dt><dd><a href="../../../constant-values.html#org.libjpegturbo.turbojpeg.TJ.NUMSAMP">Constant Field Values</a></dd></dl>
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<h4>SAMP_444</h4>
<pre>public static final int SAMP_444</pre>
<div class="block">4:4:4 chrominance subsampling (no chrominance subsampling). The JPEG
or YUV image will contain one chrominance component for every pixel in the
source image.</div>
<dl><dt><span class="strong">See Also:</span></dt><dd><a href="../../../constant-values.html#org.libjpegturbo.turbojpeg.TJ.SAMP_444">Constant Field Values</a></dd></dl>
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<h4>SAMP_422</h4>
<pre>public static final int SAMP_422</pre>
<div class="block">4:2:2 chrominance subsampling. The JPEG or YUV image will contain one
chrominance component for every 2x1 block of pixels in the source image.</div>
<dl><dt><span class="strong">See Also:</span></dt><dd><a href="../../../constant-values.html#org.libjpegturbo.turbojpeg.TJ.SAMP_422">Constant Field Values</a></dd></dl>
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<h4>SAMP_420</h4>
<pre>public static final int SAMP_420</pre>
<div class="block">4:2:0 chrominance subsampling. The JPEG or YUV image will contain one
chrominance component for every 2x2 block of pixels in the source image.</div>
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<pre>public static final int SAMP_GRAY</pre>
<div class="block">Grayscale. The JPEG or YUV image will contain no chrominance components.</div>
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<pre>public static final int SAMP_440</pre>
<div class="block">4:4:0 chrominance subsampling. The JPEG or YUV image will contain one
chrominance component for every 1x2 block of pixels in the source image.
Note that 4:4:0 subsampling is not fully accelerated in libjpeg-turbo.</div>
<dl><dt><span class="strong">See Also:</span></dt><dd><a href="../../../constant-values.html#org.libjpegturbo.turbojpeg.TJ.SAMP_440">Constant Field Values</a></dd></dl>
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<pre>public static final int SAMP_411</pre>
<div class="block">4:1:1 chrominance subsampling. The JPEG or YUV image will contain one
chrominance component for every 4x1 block of pixels in the source image.
JPEG images compressed with 4:1:1 subsampling will be almost exactly the
same size as those compressed with 4:2:0 subsampling, and in the
aggregate, both subsampling methods produce approximately the same
perceptual quality. However, 4:1:1 is better able to reproduce sharp
horizontal features. Note that 4:1:1 subsampling is not fully accelerated
in libjpeg-turbo.</div>
<dl><dt><span class="strong">See Also:</span></dt><dd><a href="../../../constant-values.html#org.libjpegturbo.turbojpeg.TJ.SAMP_411">Constant Field Values</a></dd></dl>
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<pre>public static final int NUMPF</pre>
<div class="block">The number of pixel formats</div>
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<pre>public static final int PF_RGB</pre>
<div class="block">RGB pixel format. The red, green, and blue components in the image are
stored in 3-byte pixels in the order R, G, B from lowest to highest byte
address within each pixel.</div>
<dl><dt><span class="strong">See Also:</span></dt><dd><a href="../../../constant-values.html#org.libjpegturbo.turbojpeg.TJ.PF_RGB">Constant Field Values</a></dd></dl>
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<pre>public static final int PF_BGR</pre>
<div class="block">BGR pixel format. The red, green, and blue components in the image are
stored in 3-byte pixels in the order B, G, R from lowest to highest byte
address within each pixel.</div>
<dl><dt><span class="strong">See Also:</span></dt><dd><a href="../../../constant-values.html#org.libjpegturbo.turbojpeg.TJ.PF_BGR">Constant Field Values</a></dd></dl>
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<pre>public static final int PF_RGBX</pre>
<div class="block">RGBX pixel format. The red, green, and blue components in the image are
stored in 4-byte pixels in the order R, G, B from lowest to highest byte
address within each pixel. The X component is ignored when compressing
and undefined when decompressing.</div>
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<pre>public static final int PF_BGRX</pre>
<div class="block">BGRX pixel format. The red, green, and blue components in the image are
stored in 4-byte pixels in the order B, G, R from lowest to highest byte
address within each pixel. The X component is ignored when compressing
and undefined when decompressing.</div>
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<pre>public static final int PF_XBGR</pre>
<div class="block">XBGR pixel format. The red, green, and blue components in the image are
stored in 4-byte pixels in the order R, G, B from highest to lowest byte
address within each pixel. The X component is ignored when compressing
and undefined when decompressing.</div>
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<pre>public static final int PF_XRGB</pre>
<div class="block">XRGB pixel format. The red, green, and blue components in the image are
stored in 4-byte pixels in the order B, G, R from highest to lowest byte
address within each pixel. The X component is ignored when compressing
and undefined when decompressing.</div>
<dl><dt><span class="strong">See Also:</span></dt><dd><a href="../../../constant-values.html#org.libjpegturbo.turbojpeg.TJ.PF_XRGB">Constant Field Values</a></dd></dl>
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<pre>public static final int PF_GRAY</pre>
<div class="block">Grayscale pixel format. Each 1-byte pixel represents a luminance
(brightness) level from 0 to 255.</div>
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<pre>public static final int PF_RGBA</pre>
<div class="block">RGBA pixel format. This is the same as <a href="../../../org/libjpegturbo/turbojpeg/TJ.html#PF_RGBX"><code>PF_RGBX</code></a>, except that when
decompressing, the X byte is guaranteed to be 0xFF, which can be
interpreted as an opaque alpha channel.</div>
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<pre>public static final int PF_BGRA</pre>
<div class="block">BGRA pixel format. This is the same as <a href="../../../org/libjpegturbo/turbojpeg/TJ.html#PF_BGRX"><code>PF_BGRX</code></a>, except that when
decompressing, the X byte is guaranteed to be 0xFF, which can be
interpreted as an opaque alpha channel.</div>
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<pre>public static final int PF_ABGR</pre>
<div class="block">ABGR pixel format. This is the same as <a href="../../../org/libjpegturbo/turbojpeg/TJ.html#PF_XBGR"><code>PF_XBGR</code></a>, except that when
decompressing, the X byte is guaranteed to be 0xFF, which can be
interpreted as an opaque alpha channel.</div>
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<pre>public static final int PF_ARGB</pre>
<div class="block">ARGB pixel format. This is the same as <a href="../../../org/libjpegturbo/turbojpeg/TJ.html#PF_XRGB"><code>PF_XRGB</code></a>, except that when
decompressing, the X byte is guaranteed to be 0xFF, which can be
interpreted as an opaque alpha channel.</div>
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<pre>public static final int PF_CMYK</pre>
<div class="block">CMYK pixel format. Unlike RGB, which is an additive color model used
primarily for display, CMYK (Cyan/Magenta/Yellow/Key) is a subtractive
color model used primarily for printing. In the CMYK color model, the
value of each color component typically corresponds to an amount of cyan,
magenta, yellow, or black ink that is applied to a white background. In
order to convert between CMYK and RGB, it is necessary to use a color
management system (CMS.) A CMS will attempt to map colors within the
printer's gamut to perceptually similar colors in the display's gamut and
vice versa, but the mapping is typically not 1:1 or reversible, nor can it
be defined with a simple formula. Thus, such a conversion is out of scope
for a codec library. However, the TurboJPEG API allows for compressing
CMYK pixels into a YCCK JPEG image (see <a href="../../../org/libjpegturbo/turbojpeg/TJ.html#CS_YCCK"><code>CS_YCCK</code></a>) and
decompressing YCCK JPEG images into CMYK pixels.</div>
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<pre>public static final int NUMCS</pre>
<div class="block">The number of JPEG colorspaces</div>
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<pre>public static final int CS_RGB</pre>
<div class="block">RGB colorspace. When compressing the JPEG image, the R, G, and B
components in the source image are reordered into image planes, but no
colorspace conversion or subsampling is performed. RGB JPEG images can be
decompressed to any of the extended RGB pixel formats or grayscale, but
they cannot be decompressed to YUV images.</div>
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<pre>public static final int CS_YCbCr</pre>
<div class="block">YCbCr colorspace. YCbCr is not an absolute colorspace but rather a
mathematical transformation of RGB designed solely for storage and
transmission. YCbCr images must be converted to RGB before they can
actually be displayed. In the YCbCr colorspace, the Y (luminance)
component represents the black & white portion of the original image, and
the Cb and Cr (chrominance) components represent the color portion of the
original image. Originally, the analog equivalent of this transformation
allowed the same signal to drive both black & white and color televisions,
but JPEG images use YCbCr primarily because it allows the color data to be
optionally subsampled for the purposes of reducing bandwidth or disk
space. YCbCr is the most common JPEG colorspace, and YCbCr JPEG images
can be compressed from and decompressed to any of the extended RGB pixel
formats or grayscale, or they can be decompressed to YUV planar images.</div>
<dl><dt><span class="strong">See Also:</span></dt><dd><a href="../../../constant-values.html#org.libjpegturbo.turbojpeg.TJ.CS_YCbCr">Constant Field Values</a></dd></dl>
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<pre>public static final int CS_GRAY</pre>
<div class="block">Grayscale colorspace. The JPEG image retains only the luminance data (Y
component), and any color data from the source image is discarded.
Grayscale JPEG images can be compressed from and decompressed to any of
the extended RGB pixel formats or grayscale, or they can be decompressed
to YUV planar images.</div>
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<pre>public static final int CS_CMYK</pre>
<div class="block">CMYK colorspace. When compressing the JPEG image, the C, M, Y, and K
components in the source image are reordered into image planes, but no
colorspace conversion or subsampling is performed. CMYK JPEG images can
only be decompressed to CMYK pixels.</div>
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<pre>public static final int CS_YCCK</pre>
<div class="block">YCCK colorspace. YCCK (AKA "YCbCrK") is not an absolute colorspace but
rather a mathematical transformation of CMYK designed solely for storage
and transmission. It is to CMYK as YCbCr is to RGB. CMYK pixels can be
reversibly transformed into YCCK, and as with YCbCr, the chrominance
components in the YCCK pixels can be subsampled without incurring major
perceptual loss. YCCK JPEG images can only be compressed from and
decompressed to CMYK pixels.</div>
<dl><dt><span class="strong">See Also:</span></dt><dd><a href="../../../constant-values.html#org.libjpegturbo.turbojpeg.TJ.CS_YCCK">Constant Field Values</a></dd></dl>
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<pre>public static final int FLAG_BOTTOMUP</pre>
<div class="block">The uncompressed source/destination image is stored in bottom-up (Windows,
OpenGL) order, not top-down (X11) order.</div>
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<pre>@Deprecated
public static final int FLAG_FORCEMMX</pre>
<div class="block"><span class="strong">Deprecated.</span> </div>
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<pre>@Deprecated
public static final int FLAG_FORCESSE</pre>
<div class="block"><span class="strong">Deprecated.</span> </div>
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<pre>@Deprecated
public static final int FLAG_FORCESSE2</pre>
<div class="block"><span class="strong">Deprecated.</span> </div>
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<pre>@Deprecated
public static final int FLAG_FORCESSE3</pre>
<div class="block"><span class="strong">Deprecated.</span> </div>
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<pre>public static final int FLAG_FASTUPSAMPLE</pre>
<div class="block">When decompressing an image that was compressed using chrominance
subsampling, use the fastest chrominance upsampling algorithm available in
the underlying codec. The default is to use smooth upsampling, which
creates a smooth transition between neighboring chrominance components in
order to reduce upsampling artifacts in the decompressed image.</div>
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<pre>public static final int FLAG_FASTDCT</pre>
<div class="block">Use the fastest DCT/IDCT algorithm available in the underlying codec. The
default if this flag is not specified is implementation-specific. For
example, the implementation of TurboJPEG for libjpeg[-turbo] uses the fast
algorithm by default when compressing, because this has been shown to have
only a very slight effect on accuracy, but it uses the accurate algorithm
when decompressing, because this has been shown to have a larger effect.</div>
<dl><dt><span class="strong">See Also:</span></dt><dd><a href="../../../constant-values.html#org.libjpegturbo.turbojpeg.TJ.FLAG_FASTDCT">Constant Field Values</a></dd></dl>
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<pre>public static final int FLAG_ACCURATEDCT</pre>
<div class="block">Use the most accurate DCT/IDCT algorithm available in the underlying
codec. The default if this flag is not specified is
implementation-specific. For example, the implementation of TurboJPEG for
libjpeg[-turbo] uses the fast algorithm by default when compressing,
because this has been shown to have only a very slight effect on accuracy,
but it uses the accurate algorithm when decompressing, because this has
been shown to have a larger effect.</div>
<dl><dt><span class="strong">See Also:</span></dt><dd><a href="../../../constant-values.html#org.libjpegturbo.turbojpeg.TJ.FLAG_ACCURATEDCT">Constant Field Values</a></dd></dl>
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<pre>public TJ()</pre>
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<pre>public static int getMCUWidth(int subsamp)</pre>
<div class="block">Returns the MCU block width for the given level of chrominance
subsampling.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>subsamp</code> - the level of chrominance subsampling (one of
<code>SAMP_*</code>)</dd>
<dt><span class="strong">Returns:</span></dt><dd>the MCU block width for the given level of chrominance
subsampling.</dd></dl>
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<pre>public static int getMCUHeight(int subsamp)</pre>
<div class="block">Returns the MCU block height for the given level of chrominance
subsampling.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>subsamp</code> - the level of chrominance subsampling (one of
<code>SAMP_*</code>)</dd>
<dt><span class="strong">Returns:</span></dt><dd>the MCU block height for the given level of chrominance
subsampling.</dd></dl>
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<pre>public static int getPixelSize(int pixelFormat)</pre>
<div class="block">Returns the pixel size (in bytes) for the given pixel format.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>pixelFormat</code> - the pixel format (one of <code>PF_*</code>)</dd>
<dt><span class="strong">Returns:</span></dt><dd>the pixel size (in bytes) for the given pixel format.</dd></dl>
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<pre>public static int getRedOffset(int pixelFormat)</pre>
<div class="block">For the given pixel format, returns the number of bytes that the red
component is offset from the start of the pixel. For instance, if a pixel
of format <code>TJ.PF_BGRX</code> is stored in <code>char pixel[]</code>,
then the red component will be
<code>pixel[TJ.getRedOffset(TJ.PF_BGRX)]</code>.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>pixelFormat</code> - the pixel format (one of <code>PF_*</code>)</dd>
<dt><span class="strong">Returns:</span></dt><dd>the red offset for the given pixel format.</dd></dl>
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<pre>public static int getGreenOffset(int pixelFormat)</pre>
<div class="block">For the given pixel format, returns the number of bytes that the green
component is offset from the start of the pixel. For instance, if a pixel
of format <code>TJ.PF_BGRX</code> is stored in <code>char pixel[]</code>,
then the green component will be
<code>pixel[TJ.getGreenOffset(TJ.PF_BGRX)]</code>.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>pixelFormat</code> - the pixel format (one of <code>PF_*</code>)</dd>
<dt><span class="strong">Returns:</span></dt><dd>the green offset for the given pixel format.</dd></dl>
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<h4>getBlueOffset</h4>
<pre>public static int getBlueOffset(int pixelFormat)</pre>
<div class="block">For the given pixel format, returns the number of bytes that the blue
component is offset from the start of the pixel. For instance, if a pixel
of format <code>TJ.PF_BGRX</code> is stored in <code>char pixel[]</code>,
then the blue component will be
<code>pixel[TJ.getBlueOffset(TJ.PF_BGRX)]</code>.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>pixelFormat</code> - the pixel format (one of <code>PF_*</code>)</dd>
<dt><span class="strong">Returns:</span></dt><dd>the blue offset for the given pixel format.</dd></dl>
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<h4>bufSize</h4>
<pre>public static int bufSize(int width,
int height,
int jpegSubsamp)</pre>
<div class="block">Returns the maximum size of the buffer (in bytes) required to hold a JPEG
image with the given width, height, and level of chrominance subsampling.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>width</code> - the width (in pixels) of the JPEG image</dd><dd><code>height</code> - the height (in pixels) of the JPEG image</dd><dd><code>jpegSubsamp</code> - the level of chrominance subsampling to be used when
generating the JPEG image (one of <a href="../../../org/libjpegturbo/turbojpeg/TJ.html" title="class in org.libjpegturbo.turbojpeg"><code>TJ.SAMP_*</code></a>)</dd>
<dt><span class="strong">Returns:</span></dt><dd>the maximum size of the buffer (in bytes) required to hold a JPEG
image with the given width, height, and level of chrominance subsampling.</dd></dl>
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<h4>bufSizeYUV</h4>
<pre>public static int bufSizeYUV(int width,
int pad,
int height,
int subsamp)</pre>
<div class="block">Returns the size of the buffer (in bytes) required to hold a YUV planar
image with the given width, height, and level of chrominance subsampling.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>width</code> - the width (in pixels) of the YUV image</dd><dd><code>pad</code> - the width of each line in each plane of the image is padded to
the nearest multiple of this number of bytes (must be a power of 2.)</dd><dd><code>height</code> - the height (in pixels) of the YUV image</dd><dd><code>subsamp</code> - the level of chrominance subsampling used in the YUV
image (one of <a href="../../../org/libjpegturbo/turbojpeg/TJ.html" title="class in org.libjpegturbo.turbojpeg"><code>TJ.SAMP_*</code></a>)</dd>
<dt><span class="strong">Returns:</span></dt><dd>the size of the buffer (in bytes) required to hold a YUV planar
image with the given width, height, and level of chrominance subsampling.</dd></dl>
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<h4>bufSizeYUV</h4>
<pre>@Deprecated
public static int bufSizeYUV(int width,
int height,
int subsamp)</pre>
<div class="block"><span class="strong">Deprecated.</span> <i>Use <a href="../../../org/libjpegturbo/turbojpeg/TJ.html#bufSizeYUV(int,%20int,%20int,%20int)"><code>bufSizeYUV(int, int, int, int)</code></a> instead.</i></div>
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<h4>planeSizeYUV</h4>
<pre>public static int planeSizeYUV(int componentID,
int width,
int stride,
int height,
int subsamp)</pre>
<div class="block">Returns the size of the buffer (in bytes) required to hold a YUV image
plane with the given parameters.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>componentID</code> - ID number of the image plane (0 = Y, 1 = U/Cb,
2 = V/Cr)</dd><dd><code>width</code> - width (in pixels) of the YUV image. NOTE: this is the width
of the whole image, not the plane width.</dd><dd><code>stride</code> - bytes per line in the image plane.</dd><dd><code>height</code> - height (in pixels) of the YUV image. NOTE: this is the
height of the whole image, not the plane height.</dd><dd><code>subsamp</code> - the level of chrominance subsampling used in the YUV
image (one of <a href="../../../org/libjpegturbo/turbojpeg/TJ.html" title="class in org.libjpegturbo.turbojpeg"><code>TJ.SAMP_*</code></a>)</dd>
<dt><span class="strong">Returns:</span></dt><dd>the size of the buffer (in bytes) required to hold a YUV planar
image with the given parameters.</dd></dl>
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<h4>planeWidth</h4>
<pre>public static int planeWidth(int componentID,
int width,
int subsamp)</pre>
<div class="block">Returns the plane width of a YUV image plane with the given parameters.
Refer to <a href="../../../org/libjpegturbo/turbojpeg/YUVImage.html" title="class in org.libjpegturbo.turbojpeg"><code>YUVImage</code></a> for a description of plane width.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>componentID</code> - ID number of the image plane (0 = Y, 1 = U/Cb,
2 = V/Cr)</dd><dd><code>width</code> - width (in pixels) of the YUV image</dd><dd><code>subsamp</code> - the level of chrominance subsampling used in the YUV image
(one of <a href="../../../org/libjpegturbo/turbojpeg/TJ.html" title="class in org.libjpegturbo.turbojpeg"><code>TJ.SAMP_*</code></a>)</dd>
<dt><span class="strong">Returns:</span></dt><dd>the plane width of a YUV image plane with the given parameters.</dd></dl>
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<h4>planeHeight</h4>
<pre>public static int planeHeight(int componentID,
int height,
int subsamp)</pre>
<div class="block">Returns the plane height of a YUV image plane with the given parameters.
Refer to <a href="../../../org/libjpegturbo/turbojpeg/YUVImage.html" title="class in org.libjpegturbo.turbojpeg"><code>YUVImage</code></a> for a description of plane height.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>componentID</code> - ID number of the image plane (0 = Y, 1 = U/Cb,
2 = V/Cr)</dd><dd><code>height</code> - height (in pixels) of the YUV image</dd><dd><code>subsamp</code> - the level of chrominance subsampling used in the YUV image
(one of <a href="../../../org/libjpegturbo/turbojpeg/TJ.html" title="class in org.libjpegturbo.turbojpeg"><code>TJ.SAMP_*</code></a>)</dd>
<dt><span class="strong">Returns:</span></dt><dd>the plane height of a YUV image plane with the given parameters.</dd></dl>
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<h4>getScalingFactors</h4>
<pre>public static <a href="../../../org/libjpegturbo/turbojpeg/TJScalingFactor.html" title="class in org.libjpegturbo.turbojpeg">TJScalingFactor</a>[] getScalingFactors()</pre>
<div class="block">Returns a list of fractional scaling factors that the JPEG decompressor in
this implementation of TurboJPEG supports.</div>
<dl><dt><span class="strong">Returns:</span></dt><dd>a list of fractional scaling factors that the JPEG decompressor in
this implementation of TurboJPEG supports.</dd></dl>
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