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TurboJPEG: Add alpha offset array/method

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Also, set the red/green/blue offsets for TJPF_GRAY to -1 rather than 0.
It was undefined behavior for an application to use those arrays/methods
with TJPF_GRAY anyhow, and this makes it easier for applications to
programmatically detect whether a given pixel format has red, green, and
blue components.
This commit is contained in:
DRC
2017-11-16 20:43:12 -06:00
parent aa7459050d
commit dc4b900223
26 changed files with 265 additions and 81 deletions
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59
java/doc/org/libjpegturbo/turbojpeg/TJ.html
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@@ -7,8 +7,12 @@
</head>
<body>
<script type="text/javascript"><!--
if (location.href.indexOf('is-external=true') == -1) {
parent.document.title="TJ";
try {
if (location.href.indexOf('is-external=true') == -1) {
parent.document.title="TJ";
}
}
catch(err) {
}
//-->
</script>
@@ -417,53 +421,60 @@ extends java.lang.Object</pre>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJ.html#getAlphaOffset(int)">getAlphaOffset</a></strong>(int&nbsp;pixelFormat)</code>
<div class="block">For the given pixel format, returns the number of bytes that the alpha
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#getBlueOffset(int)">getBlueOffset</a></strong>(int&nbsp;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">
<tr class="rowColor">
<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&nbsp;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">
<tr class="altColor">
<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&nbsp;subsamp)</code>
<div class="block">Returns the MCU block height for the given level of chrominance
subsampling.</div>
</td>
</tr>
<tr class="altColor">
<tr class="rowColor">
<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&nbsp;subsamp)</code>
<div class="block">Returns the MCU block width for the given level of chrominance
subsampling.</div>
</td>
</tr>
<tr class="rowColor">
<tr class="altColor">
<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&nbsp;pixelFormat)</code>
<div class="block">Returns the pixel size (in bytes) for the given pixel format.</div>
</td>
</tr>
<tr class="altColor">
<tr class="rowColor">
<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&nbsp;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">
<tr class="altColor">
<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">
<tr class="rowColor">
<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&nbsp;componentID,
int&nbsp;height,
@@ -471,7 +482,7 @@ extends java.lang.Object</pre>
<div class="block">Returns the plane height of a YUV image plane with the given parameters.</div>
</td>
</tr>
<tr class="rowColor">
<tr class="altColor">
<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&nbsp;componentID,
int&nbsp;width,
@@ -482,7 +493,7 @@ extends java.lang.Object</pre>
plane with the given parameters.</div>
</td>
</tr>
<tr class="altColor">
<tr class="rowColor">
<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&nbsp;componentID,
int&nbsp;width,
@@ -1137,7 +1148,8 @@ public static final&nbsp;int FLAG_FORCESSE3</pre>
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>
<dt><span class="strong">Returns:</span></dt><dd>the red offset for the given pixel format, or -1 if the pixel
format does not have a red component.</dd></dl>
</li>
</ul>
<a name="getGreenOffset(int)">
@@ -1153,7 +1165,8 @@ public static final&nbsp;int FLAG_FORCESSE3</pre>
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>
<dt><span class="strong">Returns:</span></dt><dd>the green offset for the given pixel format, or -1 if the pixel
format does not have a green component.</dd></dl>
</li>
</ul>
<a name="getBlueOffset(int)">
@@ -1169,7 +1182,25 @@ public static final&nbsp;int FLAG_FORCESSE3</pre>
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>
<dt><span class="strong">Returns:</span></dt><dd>the blue offset for the given pixel format, or -1 if the pixel
format does not have a blue component.</dd></dl>
</li>
</ul>
<a name="getAlphaOffset(int)">
<!-- -->
</a>
<ul class="blockList">
<li class="blockList">
<h4>getAlphaOffset</h4>
<pre>public static&nbsp;int&nbsp;getAlphaOffset(int&nbsp;pixelFormat)</pre>
<div class="block">For the given pixel format, returns the number of bytes that the alpha
component is offset from the start of the pixel. For instance, if a pixel
of format <code>TJ.PF_BGRA</code> is stored in <code>char pixel[]</code>,
then the alpha component will be
<code>pixel[TJ.getAlphaOffset(TJ.PF_BGRA)]</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 alpha offset for the given pixel format, or -1 if the pixel
format does not have a alpha component.</dd></dl>
</li>
</ul>
<a name="bufSize(int, int, int)">

8
java/doc/org/libjpegturbo/turbojpeg/TJCompressor.html
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@@ -7,8 +7,12 @@
</head>
<body>
<script type="text/javascript"><!--
if (location.href.indexOf('is-external=true') == -1) {
parent.document.title="TJCompressor";
try {
if (location.href.indexOf('is-external=true') == -1) {
parent.document.title="TJCompressor";
}
}
catch(err) {
}
//-->
</script>

8
java/doc/org/libjpegturbo/turbojpeg/TJCustomFilter.html
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@@ -7,8 +7,12 @@
</head>
<body>
<script type="text/javascript"><!--
if (location.href.indexOf('is-external=true') == -1) {
parent.document.title="TJCustomFilter";
try {
if (location.href.indexOf('is-external=true') == -1) {
parent.document.title="TJCustomFilter";
}
}
catch(err) {
}
//-->
</script>

8
java/doc/org/libjpegturbo/turbojpeg/TJDecompressor.html
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@@ -7,8 +7,12 @@
</head>
<body>
<script type="text/javascript"><!--
if (location.href.indexOf('is-external=true') == -1) {
parent.document.title="TJDecompressor";
try {
if (location.href.indexOf('is-external=true') == -1) {
parent.document.title="TJDecompressor";
}
}
catch(err) {
}
//-->
</script>

8
java/doc/org/libjpegturbo/turbojpeg/TJException.html
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@@ -7,8 +7,12 @@
</head>
<body>
<script type="text/javascript"><!--
if (location.href.indexOf('is-external=true') == -1) {
parent.document.title="TJException";
try {
if (location.href.indexOf('is-external=true') == -1) {
parent.document.title="TJException";
}
}
catch(err) {
}
//-->
</script>

8
java/doc/org/libjpegturbo/turbojpeg/TJScalingFactor.html
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@@ -7,8 +7,12 @@
</head>
<body>
<script type="text/javascript"><!--
if (location.href.indexOf('is-external=true') == -1) {
parent.document.title="TJScalingFactor";
try {
if (location.href.indexOf('is-external=true') == -1) {
parent.document.title="TJScalingFactor";
}
}
catch(err) {
}
//-->
</script>

8
java/doc/org/libjpegturbo/turbojpeg/TJTransform.html
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@@ -7,8 +7,12 @@
</head>
<body>
<script type="text/javascript"><!--
if (location.href.indexOf('is-external=true') == -1) {
parent.document.title="TJTransform";
try {
if (location.href.indexOf('is-external=true') == -1) {
parent.document.title="TJTransform";
}
}
catch(err) {
}
//-->
</script>

8
java/doc/org/libjpegturbo/turbojpeg/TJTransformer.html
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@@ -7,8 +7,12 @@
</head>
<body>
<script type="text/javascript"><!--
if (location.href.indexOf('is-external=true') == -1) {
parent.document.title="TJTransformer";
try {
if (location.href.indexOf('is-external=true') == -1) {
parent.document.title="TJTransformer";
}
}
catch(err) {
}
//-->
</script>

8
java/doc/org/libjpegturbo/turbojpeg/YUVImage.html
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@@ -7,8 +7,12 @@
</head>
<body>
<script type="text/javascript"><!--
if (location.href.indexOf('is-external=true') == -1) {
parent.document.title="YUVImage";
try {
if (location.href.indexOf('is-external=true') == -1) {
parent.document.title="YUVImage";
}
}
catch(err) {
}
//-->
</script>

8
java/doc/org/libjpegturbo/turbojpeg/package-summary.html
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@@ -7,8 +7,12 @@
</head>
<body>
<script type="text/javascript"><!--
if (location.href.indexOf('is-external=true') == -1) {
parent.document.title="org.libjpegturbo.turbojpeg";
try {
if (location.href.indexOf('is-external=true') == -1) {
parent.document.title="org.libjpegturbo.turbojpeg";
}
}
catch(err) {
}
//-->
</script>

8
java/doc/org/libjpegturbo/turbojpeg/package-tree.html
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@@ -7,8 +7,12 @@
</head>
<body>
<script type="text/javascript"><!--
if (location.href.indexOf('is-external=true') == -1) {
parent.document.title="org.libjpegturbo.turbojpeg Class Hierarchy";
try {
if (location.href.indexOf('is-external=true') == -1) {
parent.document.title="org.libjpegturbo.turbojpeg Class Hierarchy";
}
}
catch(err) {
}
//-->
</script>