https://wiki.blender.jp/index.php?action=history&feed=atom&title=Dev%3ARef%2FProposals%2FCompositor2014_p1.1_TD 2026-09-10T19:46:36Z このウィキのこのページに関する変更履歴 MediaWiki 1.31.0 https://wiki.blender.jp/index.php?title=Dev:Ref/Proposals/Compositor2014_p1.1_TD&diff=146345&oldid=prev 2018-06-28T21:07:33Z

<p>1版 をインポートしました</p> <table class="diff diff-contentalign-left" data-mw="interface"> <tr class="diff-title" lang="ja"> <td colspan="1" style="background-color: #fff; color: #222; text-align: center;">← 古い版</td> <td colspan="1" style="background-color: #fff; color: #222; text-align: center;">2018年6月28日 (木) 21:07時点における版</td> </tr><tr><td colspan="2" class="diff-notice" lang="ja"><div class="mw-diff-empty">(相違点なし)</div> </td></tr></table>

Yamyam https://wiki.blender.jp/index.php?title=Dev:Ref/Proposals/Compositor2014_p1.1_TD&diff=146344&oldid=prev 2014-04-27T17:56:50Z

<p>‎<span dir="auto"><span class="autocomment">SOLL (target situation)</span></span></p> <p><b>新規ページ</b></p><div>= Compositor 2014 p1.1 Multiple buffer types technical design =<br /> <br /> == IST (current situation) ==<br /> <br /> In the current compositor all buffers are allocated with 4 floats per pixels. Even Vector and Value buffers allocates like it is a Color buffer. The reasoning behind this was memory alignment (aligned memory reads faster than unaligned) and the memory was easier to transfer to OpenCL devices.<br /> <br /> == Issues ==<br /> <br /> When doing 4k images the memory usage is large in real composite a lot of buffers are created. This made rendering on the BI renderfarm a bit of confusing. Some 4k images were not rendered on the farm at all.<br /> <br /> When [[Dev:Ref/Proposals/Compositor2014 p1.3 TD | P1.3 buffering intermediate results]] more memory is needed during editing. In order to be prepared for this new memory consumption we should reduce the memory.<br /> <br /> == SOLL (target situation) ==<br /> <br /> The compositor was prepared for this change by introducing the MemoryBuffer class. This class is responsible for Allocating and free-ing memory. In the new situation this class will be implemented abstract and for every Buffer type:<br /> <br /> * MemoryBufferColor<br /> * MemoryBufferVector<br /> * MemoryBufferValue<br /> <br /> By introducing these additional classes we will remove possible if-statements and complex unneeded code.<br /> <br /> The MemoryBufferColor will be the only class that supports EWA filtering. Currently in Blender this filtering type is not used for Vector and Value.<br /> <br /> The Linear/Bi-linear/Nearest filtering will also be supported by all other buffers classes. A complete takeover of the samplers/filtering will be done by the [[Dev:Ref/Proposals/Compositor2014 P2.1 TD | P2.1 PixelSamplers]] project. For now we will stick with the current implementation.<br /> <br /> == Additional benefits ==<br /> <br /> During development we case across several speedups. They were small, but they eventually should make the compositor overall a bit faster.<br /> Also less memory is used during OpenCL that should speedup the load/unload of data and save some device memory.</div>

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