KRkristianp·Mar 8, 2025
Looks like it's by design: https://github.com/microsoft/D3D9On12/issues/72#issuecomment...
I have no horse in this race, but it seems frustrating.
In High memory consumption or memory leak on Intel integrated graphicsmicrosoft
D3D9On12
C++2021–2025
microsoft / D3D9On12
D3D9On12
The Direct3D9-On-12 mapping layer
5Distinct people
5Mentions
0Explicit recommenders
406GitHub stars
What to know before exploring
What it is
The Direct3D9-On-12 mapping layer
GitHub
Where it is used
No documented product use has been verified yet.
What people are saying
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This week on Hacker News
Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 1:49:46 PM UTC.
No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.
Mentions over time
HN mentions by year5 dated mentions
Observed mentions: 2021-07-29 09:37:06 UTC to 2025-03-08 03:34:08 UTC.
Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.
View mention counts and date ranges
| Period | Start (UTC) | End (exclusive, UTC) | Mentions | Submissions | Comments |
|---|---|---|---|---|---|
| 2021 | 2021-01-01 00:00:00 UTC | 2022-01-01 00:00:00 UTC | 1 | 0 | 1 |
| 2022 | 2022-01-01 00:00:00 UTC | 2023-01-01 00:00:00 UTC | 1 | 0 | 1 |
| 2023 | 2023-01-01 00:00:00 UTC | 2024-01-01 00:00:00 UTC | 2 | 1 | 1 |
| 2024 | 2024-01-01 00:00:00 UTC | 2025-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2025 | 2025-01-01 00:00:00 UTC | 2026-01-01 00:00:00 UTC | 1 | 0 | 1 |
What Hacker News says
5 sourcesDirectX9 on DirectX12 Mapping Layer
2 points · Open discussionAh yeah, and it looks like this is what they're using: https://github.com/microsoft/D3D9On12
And it looks like DirectX 11 to DirectX 12 translation exists as well: https://github.com/microsoft/D3D11On12
In 3dfx: So powerful it’s kind of ridiculousMicrosoft seems to have provided some of that in the OS as open source here:
https://github.com/microsoft/D3D9On12
Unfortunately, it looks like it's up to the application developer to support it, unless I'm reading it wrong.
In Intel is using DXVK for their Windows Arc GPU DX9 drivers> rewrite d3d9.dll to emulate the API in user mode on top of D3D12.
There seem to be such a project actually, just released to open source:
https://github.com/microsoft/D3D9On12
https://devblogs.microsoft.com/directx/open-sourcing-direct3...
But it seems you have to actively enable it in the development time, the OS won't just silently do this on itself and I doubt Microsoft or anybody else is going to update their software to do so.
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