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Pouyou-pouyou: Hi Narzoul.
Your replacement dll makes wonders.
Back in 2019, there was an intermediate version between 0.2.1 and 0.3.0 but it's no longer available on your github. This particular one gave good results with Commandos - BEL (and probably BCD too) as I wrote here. Later ones don't work correctly on it. Maybe you should make it available again ?
Regards.

EDIT : it also gives better results than the 0.3.1 on Total Annihilation and Anno 1602.
Since you're on Windows 7, I assume you're hitting a known bug with vertical synchronization that only affects Vista and 7. There is a quick fix for it in this comment: https://github.com/narzoul/DDrawCompat/issues/104#issuecomment-869168178

I just checked Commandos on Windows 10 and there is another issue as well that I haven't noticed before, which was introduced in v0.3.1 (v0.3.0 works fine). I think that issue is specific to Commandos though, I wouldn't expect a lot of other games to be affected. I will fix it in the next release. Thanks for the report!
Yes, I didn't think of using archive.org, good idea.

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narzoul: Since you're on Windows 7, I assume you're hitting a known bug with vertical synchronization that only affects Vista and 7. There is a quick fix for it in this comment: https://github.com/narzoul/DDrawCompat/issues/104#issuecomment-869168178

I just checked Commandos on Windows 10 and there is another issue as well that I haven't noticed before, which was introduced in v0.3.1 (v0.3.0 works fine). I think that issue is specific to Commandos though, I wouldn't expect a lot of other games to be affected. I will fix it in the next release. Thanks for the report!
This one also works perfectly on my computer. So this is a modified 0.3.1 if I understand correctly ? So this should be the best one for me currently until you release a new one ? Will future releases include this Vista/7-specific bugfix as well ?

Thank you, your work on this dll is invaluable for old games !
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Pouyou-pouyou: This one also works perfectly on my computer. So this is a modified 0.3.1 if I understand correctly ? So this should be the best one for me currently until you release a new one ? Will future releases include this Vista/7-specific bugfix as well ?
Yes, it is a slight modification compared to v0.3.1. You can see the exact source code diff in the same comment. As a side effect, it does restrict refresh rate to ~60Hz (not the monitor refresh rate, just the rate at which DDrawCompat updates the screen and applies v-sync if requested by the game). But that probably make no difference for the mentioned games. The next release will have a "proper" fix without such restrictions. You can use whichever version works best for you until then.
I have a small question.

I was playing around with Commandos 2 and noticed that when I quit the game, all the window's positions are messed up because of the game menu's low resolution, so I tried your wrapper with the game to see if it changed something, however I noticed that alt-tabbing the game keeps the desktop at the resolution that the game has. And since modding the game's resolution above 1440*900 is unstable, this messes the desktop quite a bit. Can something be made about that ?

Thank you.
Post edited February 26, 2022 by Pouyou-pouyou
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Pouyou-pouyou: I have a small question.

I was playing around with Commandos 2 and noticed that when I quit the game, all the window's positions are messed up because of the game menu's low resolution, so I tried your wrapper with the game to see if it changed something, however I noticed that alt-tabbing the game keeps the desktop at the resolution that the game has. And since modding the game's resolution above 1440*900 is unstable, this messes the desktop quite a bit. Can something be made about that ?

Thank you.
This is the game's native behavior also. I guess this is why the GOG setup adds the IgnoreAltTab compatibility shim for it (which DDrawCompat overrides). From what I remember, the game watches for WM_DISPLAYCHANGE events and force-changes the resolution back to its internal one, screwing up its own alt-tabbing too.

The next release will have a "fix", as in it will have an option to override display resolution, preventing the game from changing it. Release date is probably still a couple months away, though.
This fixes the invisible cursor in Salammbo: Battle for Carthage. Thank you very much!
0.3.x.x
Extremely laggy for me on Win7 x64 Sp1 and Nvidia 950m 2 Gb with some older driver (starting from 4xx they drivers are sucks! even BSOD for many people incl me).
Every old games i tested tested - less than 1 FPS. 2-5 minutes to close the game (depand on intro sequences duartion).

0.2.x.x - work like a charm in every old game i test.
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QWEEDDYZ: 0.3.x.x
Extremely laggy for me on Win7 x64 Sp1 and Nvidia 950m 2 Gb with some older driver (starting from 4xx they drivers are sucks! even BSOD for many people incl me).
Every old games i tested tested - less than 1 FPS. 2-5 minutes to close the game (depand on intro sequences duartion).

0.2.x.x - work like a charm in every old game i test.
The Win 7 perf issue is known for v0.3.x. There is a quick-fixed version here:
https://github.com/narzoul/DDrawCompat/issues/104#issuecomment-869168178

It will be fixed properly in the next release.
Post edited March 29, 2022 by narzoul