Zhiyi Zhang (@zhiyi) commented about dlls/winex11.drv/window.c:
> return;
>
> xinerama_get_fullscreen_monitors( &data->rects.visible, monitors );
> + memcpy( data->desired_state.monitors, monitors, sizeof(monitors) );
> + if (!memcmp( old_monitors, monitors, sizeof(monitors) )) return; /* states are the same, nothing to update */
The reason why something like this didn't exist before is that after the monitor changes, the old Xinerama monitor index might be different than the new ones. For example, changing the secondary monitor from right to left and then making the secondary monitor primary using the host system's utilities. We can probably invalidate the old monitor Xinerama indices after a device change.
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https://gitlab.winehq.org/wine/wine/-/merge_requests/8123#note_104289
This consolidates the two separate `CGImage`s (`colorImage` and `shapeImage`) previously used in `WineContentView` into a single `IOSurface` that also holds the window mask information in its alpha channel now.
The alpha channel is now being updated in `macdrv_surface_flush`, whenever the shape changes (and stores that change for the next update, to also keep the front buffer in sync).
This reduces the delay from setting a `CGImage` to a layer from 50ms to about 1.5ms in the `IOSurface` case (also accounting for `vImageSelectChannels_ARGB8888` operation).
Based on a patch by @bshanks.
I am already putting it out for feedback, but I will so some more testing to see how the performance impact of this is and do more exhaustive testing with shaped windows.
Ideally the double buffer solution can be avoided as well... Also the `HBITMAP` for the windows is currently backed by a `CGDataProviderRef` and could also become an `IOSurface` I believe.
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https://gitlab.winehq.org/wine/wine/-/merge_requests/7938
1. For %fs/fsbase the patch follows the macOS logic with LDT descriptor registration and Linux with switching. One notable difference is that on 32->64 transition we set %fs to GSEL(GUFS32_SEL, SEL_UPL) before restoring fsbase, otherwise FreeBSD will just revert it by reloading the selector [at the first opportunity](https://github.com/freebsd/freebsd-src/blob/5673462af5330df207…. GSEL(GUFS32_SEL, SEL_UPL) is the default %fs value on FreeBSD and is special-cased to save/restore actual fsbase value to/from PCB.
2. I was told we could get rid of fsbase glitches in signal handlers by blocking signals with [sigfastblock(2)](https://man.freebsd.org/cgi/man.cgi?query=sigfastblock) between %fs reset to the default value and fsbase reset to pthread_teb. This is currently a part of internal API for libthr, which could be exposed as pthread_signal_block_np for Wine. I'm on the fence whether it's worth it.
3. I fully admit I have no idea what registers are worth preserving around fallback sysarch(AMD64_SET_FSBASE) syscalls and whether it's appropriate to push those registers to stack. ("Kernel" stack should be fine, I assume?) Syscalls definitely clobber r8-r11.
4. For %ss see https://lkml.org/lkml/2015/4/24/216. FreeBSD doesn't have a similar workaround in the kernel, so it goes into Wine.
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v5: ntdll: Unbreak new wow64 mode on FreeBSD.
https://gitlab.winehq.org/wine/wine/-/merge_requests/8073
1. For %fs/fsbase the patch follows the macOS logic with LDT descriptor registration and Linux with switching. One notable difference is that on 32->64 transition we set %fs to GSEL(GUFS32_SEL, SEL_UPL) before restoring fsbase, otherwise FreeBSD will just revert it by reloading the selector [at the first opportunity](https://github.com/freebsd/freebsd-src/blob/5673462af5330df207…. GSEL(GUFS32_SEL, SEL_UPL) is the default %fs value on FreeBSD and is special-cased to save/restore actual fsbase value to/from PCB.
2. I was told we could get rid of fsbase glitches in signal handlers by blocking signals with [sigfastblock(2)](https://man.freebsd.org/cgi/man.cgi?query=sigfastblock) between %fs reset to the default value and fsbase reset to pthread_teb. This is currently a part of internal API for libthr, which could be exposed as pthread_signal_block_np for Wine. I'm on the fence whether it's worth it.
3. I fully admit I have no idea what registers are worth preserving around fallback sysarch(AMD64_SET_FSBASE) syscalls and whether it's appropriate to push those registers to stack. ("Kernel" stack should be fine, I assume?) Syscalls definitely clobber r8-r11.
4. For %ss see https://lkml.org/lkml/2015/4/24/216. FreeBSD doesn't have a similar workaround in the kernel, so it goes into Wine.
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v4: ntdll: Unbreak new wow64 mode on FreeBSD.
https://gitlab.winehq.org/wine/wine/-/merge_requests/8073