Is it possible to build vtkGuiSupportQt in webassembly?

Web
1

I try to build vtk with qt in webassembly, this is my build command
*************** begain of command *************
emcmake cmake …\vtk-v9.1.0 -G “MinGW Makefiles” -DBUILD_SHARED_LIBS:BOOL=OFF -DCMAKE_BUILD_TYPE:STRING=Release -DCMAKE_PREFIX_PATH=D:/Qt2/Qt6.4.0/6.4.3/wasm_32 -DCMAKE_TOOLCHAIN_FILE=D:/Qt2/Qt6.4.0/6.4.3/wasm_32/lib/cmake/Qt6/qt.toolchain.cmake -DVTK_ENABLE_LOGGING:BOOL=OFF -DQt6Core_DIR:PATH=D:/Qt2/Qt6.4.0/6.4.3/wasm_32/lib/cmake/Qt6Core -DQt6OpenGL_DIR:PATH=D:/Qt2/Qt6.4.0/6.4.3/wasm_32/lib/cmake/Qt6OpenGL -DVTK_GROUP_ENABLE_Qt:STRING=YES -DVTK_QT_VERSION=6 -DQt6_DIR:PATH=D:/Qt2/Qt6.4.0/6.4.3/wasm_32/lib/cmake/Qt6 -DVTK_ENABLE_WRAPPING:BOOL=OFF -DVTK_LEGACY_REMOVE:BOOL=ON -DVTK_OPENGL_USE_GLES:BOOL=ON -DVTK_USE_SDL2:BOOL=ON -DVTK_NO_PLATFORM_SOCKETS:BOOL=ON -DVTK_MODULE_ENABLE_VTK_hdf5:STRING=NO -DOPENGL_INCLUDE_DIR:PATH=D:\myLibs\Emscripten\Install\emsdk\upstream\emscripten\system\include -DVTK_MODULE_ENABLE_VTK_RenderingContext2D=DONT_WANT -DVTK_MODULE_ENABLE_VTK_RenderingContextOpenGL2=DONT_WANT -DOPENGL_EGL_INCLUDE_DIR:PATH=D:\myLibs\Emscripten\Install\emsdk\upstream\emscripten\system\include -DOPENGL_GLES2_INCLUDE_DIR:PATH=D:\myLibs\Emscripten\Install\emsdk\upstream\emscripten\system\include -DOPENGL_GLES3_INCLUDE_DIR:PATH=D:\myLibs\Emscripten\Install\emsdk\upstream\emscripten\system\include -DVTK_OPENGL_USE_GLES=ON -DCMAKE_INSTALL_PREFIX:PATH=D:\myLibs\VTK\vtk-v9.1.0-wasm3.1.14-qt6-install
********* end of command ***********

Here is my problem:
when it come to vtkGuiSupportQt, it generate errors:

D:\myLibs\VTK\vtk-v9.1.0\GUISupport\Qt\QVTKOpenGLWindow.cxx:266:43: error: use of undeclared identifier ‘GL_BACK_LEFT’
this->defaultFramebufferObject(), GL_BACK_LEFT, QRect(QPoint(0, 0), deviceSize));
^
D:\myLibs\VTK\vtk-v9.1.0\GUISupport\Qt\QVTKOpenGLWindow.cxx:268:43: error: use of undeclared identifier ‘GL_BACK_RIGHT’
this->defaultFramebufferObject(), GL_BACK_RIGHT, QRect(QPoint(0, 0), deviceSize));
^
D:\myLibs\VTK\vtk-v9.1.0\GUISupport\Qt\QVTKOpenGLWindow.cxx:273:43: error: use of undeclared identifier ‘GL_BACK_LEFT’
this->defaultFramebufferObject(), GL_BACK_LEFT, QRect(QPoint(0, 0), deviceSize));

It seems missing GL.h header file.
I’m not sure how to solve this, does any one meet this error? or have some advice?
Thank you in advance!

2

The QVTKOpenGLWindow class uses some OpenGL functionality that’s incompatible with WebGL2.

3

Hi @wh0395,
Did you use vtkSDL2OPenGLRenderWindow?
I am also working on a project involving vtk wasm.
So I would like to share some problems with you

4

Hi @Miranda

yes, I’m using vtkSDL2OPenGLRenderWindow for now, it works fine.
But it seems I have to use other framework for GUI part on web. like vue or react.
And I’m not familiar with vue or react :worried:

5

ok i think you are right

don’t worry,
I can help with GUI development with vue or react anytime

please post the issues

6

ok, thank you for your willing to support!