<html><head><meta http-equiv="Content-Type" content="text/html charset=windows-1252"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">Hi,<div><br></div><div>I am not familiar with the nitty-gritty of the wrapping aspects, but as a Java-based user (<a href="http://icy.bioimageanalysis.org">icy.bioimageanalysis.org</a>), I believe the issue has to do with the fact that transferring some Java array down to a vtk structure (via any setJavaArray() method) always(?) implies a copy of said structure down to the C++ layer, hence the issue of duplication. This typically happens when your data/image structure is first handled on the Java side, then passed over to VTK for rendering purposes.</div><div><br></div><div>Does this make sense? Is there any way around this? I doubted that for a while, but then remembered the good old Unsafe class in Java that might help do “dirty but efficient” communication…</div><div><br></div><div>My 2 (unexperienced) cents. Very excited about this anyhow!!</div><div><br></div><div>Alexandre</div><div><div apple-content-edited="true"><div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div style="orphans: auto; text-align: start; text-indent: 0px; widows: auto; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div style="orphans: auto; text-align: start; text-indent: 0px; widows: auto; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div style="orphans: auto; text-align: start; text-indent: 0px; widows: auto; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div style="orphans: auto; text-align: start; text-indent: 0px; widows: auto; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div style="orphans: auto; text-align: start; text-indent: 0px; widows: auto; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div style="orphans: auto; text-align: start; text-indent: 0px; widows: auto; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div style="orphans: auto; text-align: start; text-indent: 0px; widows: auto; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div style="orphans: auto; text-align: start; text-indent: 0px; widows: auto; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div style="orphans: auto; text-align: start; text-indent: 0px; widows: auto; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div style="orphans: auto; text-align: start; text-indent: 0px; widows: auto; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div style="orphans: auto; text-align: start; text-indent: 0px; widows: auto; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div><div apple-content-edited="true"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div style="color: rgb(0, 0, 0); letter-spacing: normal; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; font-size: 8px;"><br style="font-size: 8px;"></div><div><div apple-content-edited="true"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div style="color: rgb(0, 0, 0); letter-spacing: normal; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><i>—</i></div><div><div style="color: rgb(0, 0, 0); letter-spacing: normal; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; font-size: 14px;"><div><b><i>Alexandre Dufour, PhD</i></b></div><div style="font-size: 8px;"><i style="font-size: 8px;"><br style="font-size: 8px;"></i></div></div><div style="color: rgb(0, 0, 0); letter-spacing: normal; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; font-size: 14px;"><i><span style="text-align: -webkit-auto;">Senior Research Fellow @ </span></i><a href="http://www.bioimageanalysis.org"><i>Biological Image Analysis</i></a><i><span style="text-align: -webkit-auto;"> group</span></i></div><div style="color: rgb(0, 0, 0); letter-spacing: normal; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; font-size: 14px;"><a href="http://www.pasteur.fr/en"><i>Institut Pasteur</i></a><i><span style="text-align: -webkit-auto;">, </span></i><i><span style="text-align: -webkit-auto;">Dpt. of Cell Biology & Infection, </span></i><i>Paris campus (France)</i></div><div><i><span style="font-size: 14px;">CNRS UMR 3691 “Pathological and Physiological Cell Dynamics” </span></i></div><div style="color: rgb(0, 0, 0); letter-spacing: normal; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><div style="font-size: 8px;"><div><i><br></i></div></div></div></div><div style="color: rgb(0, 0, 0); letter-spacing: normal; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; font-size: 14px;"><i>Meet </i><a href="http://icy.bioimageanalysis.org"><i>Icy</i></a><i>, the next-generation Bioimage Informatics platform</i></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div>
</div>
<br><div><div>On 30 Jun 2015, at 15:46, Utkarsh Ayachit <<a href="mailto:utkarsh.ayachit@kitware.com">utkarsh.ayachit@kitware.com</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div dir="ltr">Gerrick,<div><br></div><div>The *new* zero copy design literally started a week or two ago, so it is in its infancy, but I will write a design document soon. It doesn't however do anything new for access through wrapped languages. What exactly is your use-case. I am not sure what aspect is lacking in the current implementation in that regard.</div><div><br></div><div>Utkarsh<br><div><br><div class="gmail_quote"><div dir="ltr">On Mon, Jun 29, 2015 at 6:04 PM Gerrick Bivins <<a href="mailto:Gerrick.Bivins@halliburton.com">Gerrick.Bivins@halliburton.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div lang="EN-US" link="blue" vlink="purple"><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">“</span>* deprecate the existing zero copy array API in preparation for a significant refactoring that will come in 7.0. The refactor will make zero copy arrays
both simpler to use and perform better.”<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">Where can I find more information about this?<u></u><u></u></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Does the “Zero copy array refactor” expose this framework to wrapped languages, Java in particular?<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Currently the duplication of data is one of the things holding up adoption of VTK in our application.<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Gerrick<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> vtk-developers [mailto:<a href="mailto:vtk-developers-bounces@vtk.org" target="_blank">vtk-developers-bounces@vtk.org</a>]
<b>On Behalf Of </b>David E DeMarle<br>
<b>Sent:</b> Monday, June 29, 2015 9:42 AM<br>
<b>To:</b> vtkdev; <a href="mailto:vtkusers@vtk.org" target="_blank">vtkusers@vtk.org</a><br>
<b>Subject:</b> [EXTERNAL] [vtk-developers] vtk 6.3 and vtk 7.0<u></u><u></u></span></p><p class="MsoNormal"><u></u> <u></u></p>
</div><div lang="EN-US" link="blue" vlink="purple"><p class="MsoNormal">Hey vtkers,<u></u><u></u></p></div><div lang="EN-US" link="blue" vlink="purple">
<div><p class="MsoNormal"><u></u> <u></u></p>
</div>
<div><p class="MsoNormal">We are hoping to do a vtk 6.3 release in the next couple of weeks and then immediately follow that up with a 7.0 release.<u></u><u></u></p>
</div>
<div><p class="MsoNormal"><u></u> <u></u></p>
</div>
<div><p class="MsoNormal">We'd are putting out a 6.3 out in order to:<u></u><u></u></p>
</div>
<div>
<div><p class="MsoNormal">* deprecate the existing zero copy array API in preparation for a significant refactoring that will come in 7.0. The refactor will make zero copy arrays both simpler to use and perform better.<u></u><u></u></p>
</div>
</div>
<div><p class="MsoNormal">* package up all of the progress that has been made in the master branch's OpenGL2 surface and volume rendering. The vtkpython binaries will switch over to using the OpenGL2 back end this release.<u></u><u></u></p>
</div>
<div><p class="MsoNormal"><u></u> <u></u></p>
</div>
<div><p class="MsoNormal">Please let us know if you have any feedback, critical bugs especially, and developers let us know if there is any work you have in a partially finished state that we should be sure to get into 6.3.<u></u><u></u></p>
</div>
<div><p class="MsoNormal"><u></u> <u></u></p>
</div>
<div><p class="MsoNormal">If all goes well we'll have a release candidate for 6.3 next week.<u></u><u></u></p>
</div>
<div><p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<div>
<div><p class="MsoNormal">David E DeMarle<br>
Kitware, Inc.<br>
R&D Engineer<br>
21 Corporate Drive<br>
Clifton Park, NY 12065-8662<br>
Phone: 518-881-4909<u></u><u></u></p>
</div>
</div>
</div>
</div><div lang="EN-US" link="blue" vlink="purple">This e-mail, including any attached files, may contain confidential and privileged information for the sole use of the intended recipient. Any review, use, distribution, or disclosure by others is strictly prohibited. If you are not the intended recipient (or authorized to receive information for the intended recipient), please contact the sender by reply e-mail and delete all copies of this message.<br>
</div>
_______________________________________________<br>
Powered by <a href="http://www.kitware.com/" rel="noreferrer" target="_blank">www.kitware.com</a><br>
<br>
Visit other Kitware open-source projects at <a href="http://www.kitware.com/opensource/opensource.html" rel="noreferrer" target="_blank">http://www.kitware.com/opensource/opensource.html</a><br>
<br>
Search the list archives at: <a href="http://markmail.org/search/?q=vtk-developers" rel="noreferrer" target="_blank">http://markmail.org/search/?q=vtk-developers</a><br>
<br>
Follow this link to subscribe/unsubscribe:<br>
<a href="http://public.kitware.com/mailman/listinfo/vtk-developers" rel="noreferrer" target="_blank">http://public.kitware.com/mailman/listinfo/vtk-developers</a><br>
<br>
</blockquote></div></div></div></div>
_______________________________________________<br>Powered by <a href="http://www.kitware.com">www.kitware.com</a><br><br>Visit other Kitware open-source projects at <a href="http://www.kitware.com/opensource/opensource.html">http://www.kitware.com/opensource/opensource.html</a><br><br>Please keep messages on-topic and check the VTK FAQ at: <a href="http://www.vtk.org/Wiki/VTK_FAQ">http://www.vtk.org/Wiki/VTK_FAQ</a><br><br>Search the list archives at: <a href="http://markmail.org/search/?q=vtkusers">http://markmail.org/search/?q=vtkusers</a><br><br>Follow this link to subscribe/unsubscribe:<br><a href="http://public.kitware.com/mailman/listinfo/vtkusers">http://public.kitware.com/mailman/listinfo/vtkusers</a><br></blockquote></div><br></div></body></html>