267 lines
15 KiB
HTML
267 lines
15 KiB
HTML
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<ol class="chapter"><li class="chapter-item expanded "><a href="core.html"><strong aria-hidden="true">1.</strong> Core Documentation</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="core-design.html"><strong aria-hidden="true">1.1.</strong> Filament Design</a></li><li class="chapter-item expanded "><a href="core-materials.html"><strong aria-hidden="true">1.2.</strong> Materials Overview</a></li></ol></li><li class="chapter-item expanded "><a href="api.html"><strong aria-hidden="true">2.</strong> API Reference</a></li><li class="chapter-item expanded "><a href="ios.html"><strong aria-hidden="true">3.</strong> iOS</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="cocoapods.html"><strong aria-hidden="true">3.1.</strong> CocoaPods Hello Triangle</a></li></ol></li><li class="chapter-item expanded "><a href="web.html"><strong aria-hidden="true">4.</strong> Web</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="web-tutorials.html"><strong aria-hidden="true">4.1.</strong> Tutorials</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="web-tutorial-triangle.html"><strong aria-hidden="true">4.1.1.</strong> Triangle Tutorial</a></li><li class="chapter-item expanded "><a href="web-tutorial-redball.html"><strong aria-hidden="true">4.1.2.</strong> Redball Tutorial</a></li><li class="chapter-item expanded "><a href="web-tutorial-suzanne.html"><strong aria-hidden="true">4.1.3.</strong> Suzanne Tutorial</a></li></ol></li></ol></li><li class="chapter-item expanded "><a href="dev.html"><strong aria-hidden="true">5.</strong> Developing Filament</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="dev-debugging.html"><strong aria-hidden="true">5.1.</strong> Filament Debugging</a></li><li class="chapter-item expanded "><a href="dev-spirv-debugging.html"><strong aria-hidden="true">5.2.</strong> Investigating SPIRV Issues</a></li><li class="chapter-item expanded "><a href="dev-versioning.html" class="active"><strong aria-hidden="true">5.3.</strong> Versioning</a></li><li class="chapter-item expanded "><a href="dev-vulkan.html"><strong aria-hidden="true">5.4.</strong> Vulkan Backend</a></li></ol></li></ol>
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<main>
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<h1 id="versioning"><a class="header" href="#versioning">Versioning</a></h1>
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<p>Filament uses a 3-number versioning scheme that superficially resembles a <a href="https://semver.org/">semantic
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version</a> but is actually more interesting because of our material system. Here
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are the guidelines:</p>
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<ul>
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<li>Increment the <strong>most significant</strong> number only when making a non-backwards compatible API change,
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or when introducing a major new API.</li>
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<li>Increment the <strong>middle number</strong> only when making a non-backwards compatible change to the material
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system. When this number gets bumped, users need to rebuild their mat files. Reset the middle
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number to zero when the most significant number has been incremented.</li>
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<li>Increment the <strong>least significant</strong> number each time a new release is published. Reset this number
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to zero if one of the other two numbers have been incremented.</li>
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</ul>
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<h2 id="material-versioning"><a class="header" href="#material-versioning">Material Versioning</a></h2>
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<p>Additionally, the Filament renderer and material compiler internally contain a standalone integer
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called <code>MATERIAL_VERSION</code>, defined in <code>MaterialEnums.h</code>. This should be incremented every time we
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change the middle number in the public-facing version.</p>
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<p>When a material version mismatch is detected at run time, a panic is triggered, even in release
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builds. Therefore we should increment this only when making a serious breaking change to the
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material system (e.g. changing the size of a uniform block). Cosmetic shader changes usually do
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not merit a change to the material version number.</p>
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<p>Currently our material archives have two version chunks, one for "normal" materials and one for
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post-process materials. However for now these two numbers must be set to the same value.</p>
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