Difference between revisions of "Documentation/Labs/VTK8"

Latest revision as of 21:32, 14 August 2017

This page documents the update of Slicer to use VTK 8.0.

Status on this page is out-of-date. Since VTK8 transition will happen in conjunction with Qt5, see detailed TODO lists on Documentation/Labs/Qt5-and-VTK8

Overview

It is planned to update the version of VTK that Slicer uses from 7.1 to 8.0.

Status

Builds on Linux and Windows.
Fails to build on Mac due to linker error in VTK introduced in https://gitlab.kitware.com/vtk/vtk/merge_requests/1713. Potential fix is in progress: https://gitlab.kitware.com/vtk/vtk/merge_requests/3014.
Windows shows OpenGL errors at exit with the OpenGL backend. Likely a regression from https://github.com/Kitware/VTK/commit/49802a3d15fac9dd64feb6e86fb8d0dfc2d31a05.

   Generic Warning: In C:\path\to\S\VTKv7\Rendering\OpenGL\vtkOpenGLDisplayListPainter.cxx, line 52
   failed after ReleaseAllLists 16 OpenGL errors detected
   0 : (1282) Invalid operation
   1 : (1282) Invalid operation
   ...
   15 : (1282) Invalid operation

~~VTK8 requires C++11. Because Slicer includes custom VTK classes, Slicer should also be compiled with C++11.~~
On Mac, if targeting 10.7 or 10.8, likely will need to set CMAKE_CXX_FLAGS=-stdlib=libc++ for C++11 support. Note that this would require Qt build with libc++, which is officially supported by Qt5. Note: Qt 5.7.1 minimum officially supported deployment target is 10.8. Resolution: target 10.9.
There may be picking issues with widgets. For example, the slice view ROI handles don't work correctly.
* Windows (VS2013) may have a dependency issue related to Python wrapping. At first, wrapping seems to not use the hierarchy files or runs before they are available. Building again generates the wrapped classes correctly. (resolved)
~~Update "VTKv7" project name to "VTKv8".~~
Add Slicer_VTK_VERSION_MAJOR option to support building with VTK7 and VTK8, as was done for VTK5/6 in https://github.com/Slicer/Slicer/commit/50281153c57c683106498295ea82472eaa20eee4. VTK7 wrapping should not build the hierarchy files.
~~EMSegment remote module will require updates to fix vtkDebugLeaks output.~~ (updated in r17131)

Branches/Merge Requests

VTK:

~~https://github.com/Slicer/VTK/commits/slicer-v8.0.0-2017-06-26-782d7ed~~

Slicer:

~~https://github.com/msmolens/Slicer/commits/support-vtk8~~

Outstanding VTK issues

~~Respect access specifier of using statements in wrapping: https://gitlab.kitware.com/vtk/vtk/merge_requests/2988~~
OpenGL errors occur when destroying vtkWin32OpenGLRenderWindow: https://gitlab.kitware.com/vtk/vtk/issues/17076
- Would be great to get a proper fix from the VTK team for this regression.
~~Can't build VTK on Mac with -DVTK_WRAP_PYTHON:BOOL=ON -DVTK_ENABLE_KITS:BOOL=ON because libvtkWrapping-8.1.1.dylib doesn't link.~~
Update Slicer/VTK branch to include upstreamed fixes

Slicer-specific VTK commits

Slicer's VTK 8.0 branch includes fixes/changes that aren't in upstream:

~~Fix linking libvtkWrapping with Python wrapping and kits enabled on Mac~~ (Merged upstream - Integrated in VTK as https://github.com/Kitware/VTK/commit/8a60be1)
- ~~https://github.com/Slicer/VTK/commit/cbb1269509cb32d3827adfce1795e51209132e73~~
~~Respect access specifier of using statements in wrapping~~ (Merged upstream - Integrated in VTK as https://github.com/Kitware/VTK/commit/5a4ddec)
- ~~https://github.com/Slicer/VTK/commit/93a7c677481259cf23121a053d82ba4b7c2286e6~~
~~ENH: Allow selection of seed points using vtkSeedWidget~~ (Merged upstream - Integrated in VTK as https://github.com/Kitware/VTK/commit/b684733)
- ~~https://github.com/Slicer/VTK/commit/734709ee38a0a25c92a9a0c7477cfddec5e12cf3~~
~~Ensure vtkVariant stream associated with << operator is set back to "dec".~~ (Merged upstream - Integrated in VTK as https://github.com/Kitware/VTK/commit/dc7c62a)
- ~~https://github.com/Slicer/VTK/commit/dbf5de60c0809ca6233fe428761ef19e561ef542~~
BUG: WIP: fix vtkPickingManager interaction with widgets
- https://github.com/Slicer/VTK/commit/2c55e994475b6568a5b3e7363ab70c4dd722cc5d

Test results

Windows:

Test results:

http://slicer.cdash.org/viewTest.php?onlyfailed&buildid=1058006 (Release configuration, OpenGL backend)

Linux:

Test results:

http://slicer.cdash.org/viewTest.php?onlyfailed&buildid=1053469 (Release configuration, OpenGL backend, Ubuntu 16.04)
- py_StandaloneEditorWidgetTest is vtkDebugLeaks; also occurs when built with VTK7.
http://slicer.cdash.org/viewTest.php?onlyfailed&buildid=1053471 (Release configuration, OpenGL2 backend, Ubuntu 16.04)

OS X:

Test results:

TBD

Rendering backend

Although VTK 7 changed the default setting of VTK_RENDERING_BACKEND to OpenGL2, Slicer still explicitly sets it to OpenGL. The rendering backend in Slicer is set using Slicer_VTK_RENDERING_BACKEND.

OpenGL2 backend known issues

Need to move OS X nightly build to new factory machine to be able to set CMAKE_OSX_DEPLOYMENT_TARGET:STRING=10.7. This will ensure that the required OpenGL version is found. See https://github.com/Slicer/Slicer/pull/595.
- WIP PR: https://github.com/Slicer/DashboardScripts/pull/12. Will need to be updated for Qt5.
4252: Slicer crashes on start when started through Windows Remote Desktop

Discussion

The transition plan was announced on the Slicer forum: https://discourse.slicer.org/t/transition-to-vtk-8-0/379.

Future work

Future work in Slicer related to VTK 8 could include:

Remove BTX/ETX markers.
Check for and resolve build warnings in Slicer VTK classes.
Check that settings in External_VTKv8.cmake are all still necessary, specifically VTK_USE_PARALLEL, and anything related to Qt.

@@ Line 1: / Line 1: @@
 This page documents the update of Slicer to use VTK 8.0.
+{{documentation/banner
+| text  = Status on this page is out-of-date. Since VTK8 transition will happen in conjunction with Qt5, see detailed TODO lists on [[Documentation/Labs/Qt5-and-VTK8]]}}
 ==Overview==
@@ Line 18: / Line 22: @@
 : (1282) Invalid operation
 </pre>
-* Likely will need to build Slicer with C++11 support.
+* <del>VTK8 requires C++11. Because Slicer includes custom VTK classes, Slicer should also be compiled with C++11.</del>
-* On Mac, if targeting 10.7 or 10.8, likely will need to set CMAKE_CXX_FLAGS=-stdlib=libc++ for C++11 support. Note that this would require Qt build with libc++, which is officially supported by Qt5. Note: Qt 5.7.1 minimum officially supported deployment target is 10.8.
+* <del>On Mac, if targeting 10.7 or 10.8, likely will need to set CMAKE_CXX_FLAGS=-stdlib=libc++ for C++11 support. Note that this would require Qt build with libc++, which is officially supported by Qt5. Note: Qt 5.7.1 minimum officially supported deployment target is 10.8.</del> Resolution: target 10.9.
 * There may be picking issues with widgets. For example, the slice view ROI handles don't work correctly.
 * <del>* Windows (VS2013) may have a dependency issue related to Python wrapping. At first, wrapping seems to not use the hierarchy files or runs before they are available. Building again generates the wrapped classes correctly.</del> (resolved)
@@ Line 30: / Line 34: @@
 <b>VTK:</b>
-* https://github.com/Slicer/VTK/commits/slicer-v8.0.0-2017-06-26-782d7ed
+* <del>https://github.com/Slicer/VTK/commits/slicer-v8.0.0-2017-06-26-782d7ed</del>
 <b>Slicer:</b>
-* https://github.com/msmolens/Slicer/commits/support-vtk8
+* <del>https://github.com/msmolens/Slicer/commits/support-vtk8</del>
 ====Outstanding VTK issues====
@@ Line 41: / Line 45: @@
 * OpenGL errors occur when destroying vtkWin32OpenGLRenderWindow: https://gitlab.kitware.com/vtk/vtk/issues/17076
 ** Would be great to get a proper fix from the VTK team for this regression.
-* Can't build VTK on Mac with <tt>-DVTK_WRAP_PYTHON:BOOL=ON -DVTK_ENABLE_KITS:BOOL=ON</tt> because libvtkWrapping-8.1.1.dylib doesn't link.
+* <del>Can't build VTK on Mac with <tt>-DVTK_WRAP_PYTHON:BOOL=ON -DVTK_ENABLE_KITS:BOOL=ON</tt> because libvtkWrapping-8.1.1.dylib doesn't link.</del>
 * Update Slicer/VTK branch to include upstreamed fixes
@@ Line 47: / Line 51: @@
 Slicer's VTK 8.0 branch includes fixes/changes that aren't in upstream:
-* Fix linking libvtkWrapping with Python wrapping and kits enabled on Mac
+* <del>Fix linking libvtkWrapping with Python wrapping and kits enabled on Mac</del> {{done}} (Merged upstream - Integrated in VTK as https://github.com/Kitware/VTK/commit/8a60be1)
-** https://github.com/Slicer/VTK/commit/cbb1269509cb32d3827adfce1795e51209132e73
+** <del>https://github.com/Slicer/VTK/commit/cbb1269509cb32d3827adfce1795e51209132e73</del>
-* <del>Respect access specifier of using statements in wrapping</del> (Merged upstream)
+* <del>Respect access specifier of using statements in wrapping</del> {{done}} (Merged upstream - Integrated in VTK as https://github.com/Kitware/VTK/commit/5a4ddec)
 ** <del>https://github.com/Slicer/VTK/commit/93a7c677481259cf23121a053d82ba4b7c2286e6</del>
-* ENH: Allow selection of seed points using vtkSeedWidget
+* <del>ENH: Allow selection of seed points using vtkSeedWidget</del> {{done}} (Merged upstream - Integrated in VTK as https://github.com/Kitware/VTK/commit/b684733)
-** https://github.com/Slicer/VTK/commit/734709ee38a0a25c92a9a0c7477cfddec5e12cf3
+** <del>https://github.com/Slicer/VTK/commit/734709ee38a0a25c92a9a0c7477cfddec5e12cf3</del>
-* Ensure vtkVariant stream associated with << operator is set back to "dec".
+* <del>Ensure vtkVariant stream associated with << operator is set back to "dec".</del> {{done}} (Merged upstream - Integrated in VTK as https://github.com/Kitware/VTK/commit/dc7c62a)
-** https://github.com/Slicer/VTK/commit/dbf5de60c0809ca6233fe428761ef19e561ef542
+** <del>https://github.com/Slicer/VTK/commit/dbf5de60c0809ca6233fe428761ef19e561ef542</del>
 * BUG: WIP: fix vtkPickingManager interaction with widgets
 ** https://github.com/Slicer/VTK/commit/2c55e994475b6568a5b3e7363ab70c4dd722cc5d
@@ Line 83: / Line 87: @@
 * Need to move OS X nightly build to new factory machine to be able to set <tt>CMAKE_OSX_DEPLOYMENT_TARGET:STRING=10.7</tt>. This will ensure that the required OpenGL version is found. See https://github.com/Slicer/Slicer/pull/595.
+** WIP PR: https://github.com/Slicer/DashboardScripts/pull/12. Will need to be updated for Qt5.
 * [http://www.na-mic.org/Bug/view.php?id=4252 4252: Slicer crashes on start when started through Windows Remote Desktop]
@@ Line 88: / Line 93: @@
 The transition plan was announced on the Slicer forum: https://discourse.slicer.org/t/transition-to-vtk-8-0/379.
-==Migration guide==
-This section lists categories of code changes necessary to build and run Slicer with VTK 8.0. Each category has a short description, a suggested upgrade path, and references to relevant commits (TBD once merged).
-===Use hierarchy files for VTK Python wrapping===
-In VTK8 it's necessary to generate hierarchy files for proper wrapping VTK classes in Python. Without the information provided by the hierarchy files, the Python wrapping tool lacks complete information about classes and types. In this case, the generated classes contain methods that shouldn't be wrapped and fail to compile, and include references to types such as <tt>vtkTypeBool</tt>. Once the hierarchy files are generated and provided to the Python wrapping tool, the generated classes compile and typedefs like <tt>vtkTypeBool</tt> are correctly resolved.
-Once the VTK8 changes are merged, generating hierarchy files is handled by https://github.com/Slicer/Slicer/blob/master/CMake/vtkMacroKitPythonWrap.cmake.
-<b>References:</b>
-* http://www.vtk.org/Wiki/VTK/WrapHierarchy
-===Call InitializeObjectBase() in vtkObject New() methods===
-In VTK8 it's necessary for <tt>vtkObject</tt> <tt>New()</tt> methods to call <tt>InitializeObjectBase()</tt> on the new object for proper tracking with <tt>vtkDebugLeaks</tt>. The standard macros (<tt>vtkStandardNewMacro</tt>, <tt>vtkObjectFactoryNewMacro</tt>) handle this. For those classes that don't use the macros, add a call to <tt>InitializeObjectBase()</tt> immediately after constructing the object by <tt>new vtkXXX()</tt>.
-Additionally, <tt>vtkObjectFactory::CreateInstance()</tt> now doesn't register the class name with vtkDebugLeaks if the factory fails to create the object. Therefore, it's no longer necessary to unregister the class name with vtkDebugLeaks. Remove calls to <tt>vtkDebugLeaks::DestructClass(className)</tt> following <tt>vtkObjectFactory::CreateInstance()</tt>.
-To support both VTK8 and earlier versions of VTK, wrap these changes in preprocessor checks for whether <tt>VTK_HAS_INITIALIZE_OBJECT_BASE</tt> is defined.
-<b>References:</b>
-* https://github.com/Kitware/VTK/commit/e5c793dbdf87e838bb2b60c6a5905ced0e5548f9
-* http://public.kitware.com/pipermail/vtk-developers/2016-September/034332.html
 ==Future work==

Difference between revisions of "Documentation/Labs/VTK8"

Latest revision as of 21:32, 14 August 2017

Contents

Overview

Status

Branches/Merge Requests

Outstanding VTK issues

Slicer-specific VTK commits

Test results

Rendering backend

OpenGL2 backend known issues

Discussion

Future work

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