VTK WASM Error – Uncaught TypeError: Cannot read properties of null (reading ‘bindFramebuffer’) at _glBindFramebuffer

There are some errors and warnings after I changed canvas for VTK wasm.

The related post: https://www.weiy.city/2023/11/change-canvas-for-vtk-wasm-project/

INVALID_OPERATION: UDesignCommonDataModel.js:8 WebGL: INVALID_OPERATION: delete: object does not belong to this context
_glDeleteTextures
GL_INVALID_OPERATION: Texture format does not support mipmap generation.


WebGL: INVALID_OPERATION: bindFramebuffer: object does not belong to this context
GL_INVALID_OPERATION: Blit feedback loop: the read and draw framebuffers are the same.


MyDataModel.js:8 Uncaught TypeError: Cannot read properties of null (reading 'bindFramebuffer')
    at _glBindFramebuffer (MyDataModel.js:8:211681)
    at MyDataModel.wasm:0x4f6ddb
    at MyDataModel.wasm:0x4e5e56

We need to free up graphics resources with the old window before we render again.

  /**
   * Free up any graphics resources associated with this window
   * a value of NULL means the context may already be destroyed
   */
  void ReleaseGraphicsResources(vtkWindow*) override;

worker.cpp:

void Worker::ChangeRenderWindow()
{
//...

    vtkSDL2OpenGLRenderWindow* oldSDLWin = vtkSDL2OpenGLRenderWindow::SafeDownCast( m_RenderWindow );
    oldSDLWin->ReleaseGraphicsResources( oldSDLWin ); 
/*
myDataModel;.js:8 Uncaught TypeError: Cannot read properties of null (reading 'bindFramebuffer')
    at _glBindFramebuffer (myDataModel;.js:8:211681)
    at UDesignCommonDataModel.wasm:0x4f6ddb
    at UDesignCommonDataModel.wasm:0x4e5e56
*/

    m_RenderWindow = newWin;
    m_RenderWindow->Render();

    m_RenderWindowInteractor->Start();
}