df9dbff830
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
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<h2 title="Class TJScalingFactor" class="title">Class TJScalingFactor</h2>
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<pre>public class <span class="typeNameLabel">TJScalingFactor</span>
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<div class="block">Fractional scaling factor</div>
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<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(int,int)">TJScalingFactor</a></span>​(int num,
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int denom)</code></th>
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<div class="block">Create a TurboJPEG scaling factor instance.</div>
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<td class="colFirst"><code>boolean</code></td>
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<td class="colFirst"><code>int</code></td>
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<div class="block">Returns denominator</div>
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<td class="colFirst"><code>int</code></td>
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<div class="block">Returns numerator</div>
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<td class="colFirst"><code>int</code></td>
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<div class="block">Returns the scaled value of <code>dimension</code>.</div>
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int denom)</pre>
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<div class="block">Create a TurboJPEG scaling factor instance.</div>
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<dl>
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<dt><span class="paramLabel">Parameters:</span></dt>
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<dd><code>num</code> - numerator</dd>
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<dd><code>denom</code> - denominator</dd>
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<dd>numerator</dd>
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<div class="block">Returns denominator</div>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>denominator</dd>
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<div class="block">Returns the scaled value of <code>dimension</code>. This function
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performs the integer equivalent of
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<code>ceil(dimension * scalingFactor)</code>.</div>
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<dt><span class="paramLabel">Parameters:</span></dt>
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<dd><code>dimension</code> - width or height to multiply by this scaling factor</dd>
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<dt><span class="returnLabel">Returns:</span></dt>
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<code>other</code> have the same numerator and denominator.</div>
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<dt><span class="paramLabel">Parameters:</span></dt>
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<dd><code>other</code> - the scaling factor against which to compare this one</dd>
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1/1.</div>
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<dt><span class="returnLabel">Returns:</span></dt>
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1/1.</dd>
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