dgVoodoo index buffer lock fail with D3D12 \ VOGONS

dgVoodoo index buffer lock fail with D3D12

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First post, by shoober420

Posted on 2025-11-03, 18:26

shoober420 Offline

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when playing Max Payne with dgvoodoo2 2.86.3 and Output API set to "Direct3D 12 (feature level 11.0)" or "Direct3D 12 (feature level 12.0)", Max Payne crashes with this error.

1P_D3DIndexBufferManager: IndexBuffer->Lock : D3DERR_INVALIDCALL

when using Output API "Direct3D 11 (feature level 11.0)" the game wont crash

Reply 1 of 2, by lowenz

Posted on 2025-11-03, 18:47

lowenz Online

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Intel GPU ? It's normal

Reply 2 of 2, by Dege

Posted on 2025-11-29, 15:43

Dege Offline

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No, it's not. I got a new hw and I can also reproduce it with other stuffs.

It turns out to be a GPU-independent bug in dgVoodoo itself. Preconditions:
- D3D12 backend
- a D3D8/9 application trying to Lock a dynamic index buffer
- Win11 with D3D12 driver reporting Triangle Fan support

I fixed it. But I found another D3D12 problem with my new hw (I'm planning to do some extensive testing).
I'll release a cumulative bugfix version, I think.

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