## Summary of the Pull Request
Introduces a non-configurable version of mark mode to Windows Terminal. It has the following interactions defined:
- <kbd>ctrl+shift+m</kbd> --> Enter Mark Mode
- when in Mark Mode...
- <kbd>ESC</kbd> --> Exit Mark Mode
- arrow keys --> move "start"
- <kbd>shift</kbd> + arrow keys --> anchor "start", move "end"
- <kbd>ctrl+a</kbd> --> select all
- when a selection is active...
When in mark mode, the cursor does not blink.
## References
#4993 - [Epic] Keyboard Selection
## PR Checklist
* [X] Closes#715
* [X] Provides a resolution for #11985
## Detailed Description of the Pull Request / Additional comments
- `TermControl`:
- `TermControl.cpp` just adds logic to prevent the cursor from blinking when in mark mode
- `ControlCore`
- in the same place we handle quick edit, we add an entry point to mark mode
- `TerminalCore`
- this leverages `UpdateSelection()` and other quick edit functions to make mark mode happen
## Validation Steps Performed
- [x] Make selection, split pane, close pane
- NOTE: A similar scenario caused a crash at one point. Really weird. Keep an eye on it.
- [x] Cursor is off when in mark mode
- [x] general movement/selection
- [x] general movement/selection that forces the viewport to move
- [x] In mark mode, selectAll...
- [x] arrow keys --> move start
- [x] shift + arrow keys --> move end
- [x] (regardless of mark mode) if selection active, enter --> copy to clipboard
## Summary of the Pull Request
Add `Find` to tab context menu as describe in issue #5633.
## PR Checklist
* [x] Closes#5633
* [x] CLA signed. If not, go over [here](https://cla.opensource.microsoft.com/microsoft/Terminal) and sign the CLA
## Detailed Description of the Pull Request / Additional comments
Just wanted to solve `Easy Starter` issue, so any corrections/suggestions welcome. There's a couple of points I'm not sure of
* Placement of item within menu, currently it's at the end before close tab block.
* Should it be named longer, something like `Find in Tab` of just `Find` is fine?
* The workaround for focus similar to tab rename is a bit annoying, especially because it required adding a method to `TermControl` but without it find window obviously opens without focus which is bad.
## Validation Steps Performed
Open menu, press menu item try to find things via opened find dialog.
Fixes the following issues:
* `desktopWallpaper` not working
* switching tabs/panes causes the background to flicker
* settings preview having a transparent background
## PR Checklist
* [x] Closes#13002
* [x] I work here
* [x] Tests added/passed
## Validation Steps Performed
Tested the 3 cases above. ✅
Adds the `selectAll` action which can be used to select all text in the buffer (regardless of whether a selection is present).
## References
#3663 - Mark Mode
#4993 - [Scenario] Keyboard selection
## PR Checklist
* [x] Closes#1469
* [x] Tests added/passed
## Detailed Description of the Pull Request / Additional comments
I've made it such that selecting the "entire buffer" really just selects up to the mutable viewport. This seems like a nice QOL improvement since there's generally nothing past that.
When the user selects all, the viewport does not move. This is consistent with CMD behavior and is intended to allow the user to not lose context when selecting everything.
A minor change had to be made to the DxRenderer because this uncovered an underflow issue. Basically, the selection rects were handed to the DxEngine relative to the viewport (which means that some had a negative y-value). At some point, those rects were stored into `size_t`s, resulting in an underflow issue. This caused the renderer to behave strangely when rendering the selection. Generally, these kinds of issues weren't really noticed because selection would always modify a portion of the viewport.
Funny enough, in a way, this satisfies the "mark mode" scenario because the user now has a way to initiate a selection using only the keyboard. Though this isn't ideal, just a fun thing to point out (that's why I'm not closing the mark mode issue).
## Validation Steps Performed
- Verified using DxEngine and AtlasEngine
- select all --> keyboard selection --> start moving the top-left endpoint (and scroll to there)
- select all --> do not scroll automatically
Propagate show/hide window calls against the ConPTY pseudo window to the Terminal
## PR Checklist
* [x] Closes#12570
* [x] I work here
* [x] Manual Tests passed
* [x] Spec Link: →[Doc Link](https://github.com/microsoft/terminal/blob/dev/miniksa/msgs/doc/specs/%2312570%20-%20Show%20Hide%20operations%20on%20GetConsoleWindow%20via%20PTY.md)←
## Detailed Description of the Pull Request / Additional comments
- See the spec. It's pretty much everything I went through deciding on this.
## Validation Steps Performed
- [x] Manual validation against scratch application calling all of the `::ShowWindow` commands against the pseudo console "fake window" and observing the real terminal window state
<!-- Enter a brief description/summary of your PR here. What does it fix/what does it change/how was it tested (even manually, if necessary)? -->
## Summary of the Pull Request
Fixes#6028
Setting is "experimental.useBackgroundImageForWindow"
<!-- Other than the issue solved, is this relevant to any other issues/existing PRs? -->
## References
https://github.com/microsoft/terminal/issues/6028
<!-- Please review the items on the PR checklist before submitting-->
## PR Checklist
* [X] Closes#6028
* [X] CLA signed.
* [ ] Tests added/passed
* [ ] Documentation updated. I read CONTRIBUTING.md, but I'm not sure if a spec is needed for an experimental feature such as this one.
* [ ] Schema updated. I added a JSON key, not sure where I need to update it.
* [X] I've discussed this with core contributors already. Somewhat discussed in https://github.com/microsoft/terminal/issues/6028
<!-- Provide a more detailed description of the PR, other things fixed or any additional comments/features here
## Detailed Description of the Pull Request / Additional comments -->
<!-- Describe how you validated the behavior. Add automated tests wherever possible, but list manual validation steps taken as well -->
## Validation Steps Performed
Set ` "experimental.useBackgroundImageForWindow": true` and a bg image for one profile, then make splits and tabs and make sure the bg updates accordingly:
I also did the same with the setting off to make sure it still works correctly and didn't break. And I made sure opening the settings tab does not crash or show the bg image.
#4015 requires sweeping changes in order to allow a migration of our buffer
coordinates from `int16_t` to `int32_t`. This commit reduces the size of
future commits by using type inference wherever possible, dropping the
need to manually adjust types throughout the project later.
As an added bonus this commit standardizes the alignment of cv qualifiers
to be always left of the type (e.g. `const T&` instead of `T const&`).
The migration to type inference with `auto` was mostly done
using JetBrains Resharper with some manual intervention and the
standardization of cv qualifier alignment using clang-format 14.
## References
This is preparation work for #4015.
## Validation Steps Performed
* Tests pass ✅
## Window shenanigans, part the first:
This PR enables terminals to tell ConPTY what the owning window for the
pseudo window should be. This allows thigs like MessageBoxes created by
console applications to work. It also enables console apps to use
`GetAncestor(GetConsoleWindow(), GA_ROOT)` to get directly at the HWND
of the Terminal (but _don't please_).
This is tested with our internal partners and seems to work for their
scenario.
See #2988, #12799, #12515, #12570.
## PR Checklist
This is 1/3 of #2988.
<!-- Enter a brief description/summary of your PR here. What does it fix/what does it change/how was it tested (even manually, if necessary)? -->
## Summary of the Pull Request
This builds on top of #12707. As I understand it the primary motivation for using a git submodule instead of NuGet is just that it is too annoying to have to manage dozens of packages.config files and their corresponding import statements. Now that there is a single global nuget definition that is a nonissue and we can switch over.
This also updates to the latest version of WIL.
Now that the latest version of WIL is available it uses it to replace `winrt::resume_foreground` with `wil::resume_foreground`. See [492c01bb53) for a detailed explanation of the problems with `winrt::resume_foreground` and how WIL addresses them.
<!-- Other than the issue solved, is this relevant to any other issues/existing PRs? -->
## References
<!-- Please review the items on the PR checklist before submitting-->
## PR Checklist
* [ ] Closes#12776, Closes#12777
* [ ] CLA signed. If not, go over [here](https://cla.opensource.microsoft.com/microsoft/Terminal) and sign the CLA
* [ ] Tests added/passed
* [ ] Documentation updated. If checked, please file a pull request on [our docs repo](https://github.com/MicrosoftDocs/terminal) and link it here: #xxx
* [ ] Schema updated.
* [ ] I've discussed this with core contributors already. If not checked, I'm ready to accept this work might be rejected in favor of a different grand plan. Issue number where discussion took place: #xxx
<!-- Provide a more detailed description of the PR, other things fixed or any additional comments/features here -->
## Detailed Description of the Pull Request / Additional comments
<!-- Describe how you validated the behavior. Add automated tests wherever possible, but list manual validation steps taken as well -->
## Validation Steps Performed
Ran `git clean -fdx` to wipe my clone to be completely clean. Opened the solution in Visual Studio 2022 and build it. Used `razzle.cmd`, `b`, and `runut.cmd` to run the tests.
## Summary of the Pull Request
This change makes Windows Terminal raise a `RaiseNotificationEvent()` ([docs](https://docs.microsoft.com/en-us/uwp/api/windows.ui.xaml.automation.peers.automationpeer.raisenotificationevent?view=winrt-22000)) for new text output to the buffer.
This is intended to help Narrator identify what new output appears and reduce the workload of diffing the buffer when a `TextChanged` event occurs.
## Detailed Description of the Pull Request / Additional comments
The flow of the event occurs as follows:
- `Terminal::_WriteBuffer()`
- New text is output to the text buffer. Notify the renderer that we have new text (and what that text is).
- `Renderer::TriggerNewTextNotification()`
- Cycle through all the rendering engines and tell them to notify handle the new text output.
- None of the rendering engines _except_ `UiaEngine` has it implemented, so really we're just notifying UIA.
- `UiaEngine::NotifyNewText()`
- Concatenate any new output into a string.
- When we're done painting, tell the notification system to actually notify of new events occurring and clear any stored output text. That way, we're ready for the next renderer frame.
- `InteractivityAutomationPeer::NotifyNewOutput()` --> `TermControlAutomationPeer::NotifyNewOutput`
- NOTE: these are split because of the in-proc and out-of-proc separation of the buffer.
- Actually `RaiseNotificationEvent()` for the new text output.
Additionally, we had to handle the "local echo" problem: when a key is pressed, the character is said twice (once for the keyboard event, and again for the character being written to the buffer). To accomplish this, we did the following:
- `TermControl`:
- here, we already handle keyboard events, so I added a line saying "if we have an automation peer attached, record the keyboard event in the automation peer".
- `TermControlAutomationPeer`:
- just before the notification is dispatched, check if the string of recent keyboard events match the beginning of the string of new output. If that's the case, we can assume that the common prefix was the "local echo".
This is a fairly naive heuristic, but it's been working.
Closes the following ADO bugs:
- https://dev.azure.com/microsoft/OS/_workitems/edit/36506838
- (Probably) https://dev.azure.com/microsoft/OS/_workitems/edit/38011453
## Test cases
- [x] Base case: "echo hello"
- [x] Partial line change
- [x] Scrolling (should be unaffected)
- [x] Large output
- [x] "local echo": keyboard events read input character twice
This commit enables `/std:c++20` for local development under VS17.
Our CIs will continue to use VS16 and C++17 for now in order to reduce
the likelihood of regressions during the current development cycle.
It's expected that we'll migrate to VS17 soon, as this
is what conhost is already being built with anyways.
## PR Checklist
* [x] Closes#12510
* [x] I work here
* [x] Tests added/passed
## Validation Steps Performed
* Everything compiles under `/std:c++20` ✅
<!-- Enter a brief description/summary of your PR here. What does it fix/what does it change/how was it tested (even manually, if necessary)? -->
## Summary of the Pull Request
Fix typos found by codespell. Some of it in documentation and user-visible text, mostly in code comments. While I understand you might not be interested in fixing code comments, one of the reasons being extra noise in git history, kindly note that most spell checking tools do not discriminate between documentation and code comments. So it's easier to fix everything for long maintenance.
<!-- Other than the issue solved, is this relevant to any other issues/existing PRs? -->
## References
<!-- Please review the items on the PR checklist before submitting-->
## PR Checklist
* [ ] Closes #xxx
* [X] CLA signed. If not, go over [here](https://cla.opensource.microsoft.com/microsoft/Terminal) and sign the CLA
* [x] Tests added/passed
* [X] Documentation updated. If checked, please file a pull request on [our docs repo](https://github.com/MicrosoftDocs/terminal) and link it here: [#501](https://github.com/MicrosoftDocs/terminal/pull/501)
* [ ] Schema updated.
* [ ] I've discussed this with core contributors already. If not checked, I'm ready to accept this work might be rejected in favor of a different grand plan. Issue number where discussion took place: #xxx
<!-- Provide a more detailed description of the PR, other things fixed or any additional comments/features here -->
## Detailed Description of the Pull Request / Additional comments
<!-- Describe how you validated the behavior. Add automated tests wherever possible, but list manual validation steps taken as well -->
## Validation Steps Performed
I have checked and re-checked all changes.
Basically, this is the same as #12266, but for the `SearchBoxControl`. Trickily, the ControlCore is the one that knows if there were search results, but the TermControl has to be the one to announce it.
* [x] Will take care of #11973 once a11y team confirms
* [x] Tested manually with Narrator
* [x] Resolves a part of #6319, which I'm repurposing just to displaying the number of results in general.
* See also #3920
More fallout from the settings refactor. Probably because testing on a Windows
10 device is hard, because you actually need a physical machine to get acrylic
to behave correctly.
Basically, the code is simpler now, but we missed the windows 10 only edge case
where acrylic can get turned on, but we forget to enable the acrylic brush, so
it just stays off.
Refer to #11619 where this regressed, and #11643, #12229, because this is just a
hard problem apparently
* [x] Closes#11743. Technically OP is complaining about behavior that's
by-design, but it made me realize this regressed in 1.12.
* [ ] No tests on this part of the `TermControl` unfortunately.
* [x] Hauled out my old Win10 laptop to verify that opacity works right:
- [x] A fresh profile isn't created with any opacity
- [x] Mouse wheeling turns on acrylic
- [x] Using `opacity` only in the settings still stealthily enables acrylic
This commit correctly restores the previous opacity when the command palette
preview is cancelled. It includes an additional change in order to make the
`AdjustOpacity` setter consistent and symmetric with the `Opacity` getter.
## PR Checklist
* [x] Closes#12228
* [x] I work here
* [x] Tests added/passed
## Validation Steps Performed
* Open Windows Terminal command palette
* Choose "Set background opacity..."
* Cycle through the items without selecting one
* Press Escape
* Previous opacity is restored ✅
This commit makes the following changes to `til::point/size/rectangle`
for the following reasons:
* Rename `rectangle` into `rect`
This will make the naming consistent with a later `small_rect` struct
as well as the existing Win32 POINT/SIZE/RECT structs.
* Standardizes til wrappers on `int32_t` instead of `ptrdiff_t`
Provides a consistent behavior between x86 and x64, preventing accidental
errors on x86, as it's less rigorously tested than x64. Additionally it
improves interop with MIDL3 which only supports fixed width integer types.
* Standardizes til wrappers on throwing `gsl::narrow_error`
Makes the behavior of our code more consistent.
* Makes all eligible functions `constexpr`
Because why not.
* Removes implicit constructors and conversion operators
This is a complex and controversial topic. My reasons are: You can't Ctrl+F
for an implicit conversion. This breaks most non-IDE engines, like the one on
GitHub or those we have internally at MS. This is important for me as these
implicit conversion operators aren't cost free. Narrowing integers itself,
as well as the boundary checks that need to be done have a certain,
fixed overhead each time. Additionally the lack of noexcept prevents
many advanced compiler optimizations. Removing their use entirely
drops conhost's code segment size by around ~6.5%.
## References
Preliminary work for #4015.
## PR Checklist
* [x] I work here
* [x] Tests added/passed
## Validation Steps Performed
I'm mostly relying on our unit tests here. Both OpenConsole and WT appear to work fine.
Adds an action which can be used to change the opacity at runtime. This is a follow up to some of the other work I had been doing around opacity and settings previewing at the end of the year.
> edit: pseudo-spec
>
> * `adjustOpacity`:
> * `"opacity"`: (**required**) an integer number to set the opacity to.
> * `"relative"`: (defaults to `true`)
> * If false, set the opacity to the given value, which should be between [0, 100].
> * If true, then use `opacity` as a relative adjustment to the current opacity. So the implementation would get the current opacity for this pane, then add this action's opacity to that value. Should be between [-100, 100]
>
> This would allow both setting exactly 25% opacity with an action, and binding an action that increases/decreases the opacity one {amount}
It's preview-able too, which is neat.
* [x] Closes#11205
* [x] I work here
* [x] Docs updated: https://github.com/MicrosoftDocs/terminal/pull/477
I'm not 100% sure that this is the right solution, but it does seem to work well enough. This is unfortunately a classic heisenbug. It was already hard enough to repro originally, but attaching a debugger made it totally impossible to hit.
My theory is that it's possible for the GotFocus event to fire before the LayoutUpdated event does. If that were to occur, then we'd try to turn on the cursor timer before it exists, gracefully do nothing, then create the timer. In that case, we'd never get a subsequent message to start the blinking.
I tested that theory by just initializing the cursor blinker to our `_focused` state. In that case, if the control has already been focused at the time of the LayoutUpdated event, then we can init the cursor to the correct state. Testing that out, I couldn't once get this to repro, which makes me think this works. I've opened some 900 (<sup>hyperbole</sup>) tabs now, so I'm pretty confident I'd have seen it by now.
* Regressed in #10978
* [x] fixes#11411
* [x] I made sure I didn't regress #6586
* [x] I work here
This PR attempts to minimize the amount of fiddling we do with the alpha
color components, by storing all colors with a zero alpha (the default
for `COLORREF` values) and then leaving it up to the renderer to adjust
the final alpha value as required (which it was already doing anyway).
This gets rid of the `argb.h` header file, which was originally being
used to produce `COLORREF` values with custom alpha components, and thus
is no longer required. Anywhere that was using the `ARGB` macro is now
using a standard `RGB` macro with a 0 alpha.
The `Utils::SetColorTableAlpha` method has also been removed, since that
was only really used to force an alpha of 255 on all the color table
entries, which isn't necessary.
There were also a number of places where we were using
`til::color::with_alpha`, to switch alpha components back and forth
between 0 and 255, which have now been removed. Some of these were
essentially noops, because the `til::color` class already applied the
appropriate alpha changes when converting from or to a `COLORREF`.
I've manually run a few attribute rendering tests to check that the
colors were still working correctly, and the default background color is
appropriately transparent when in acrylic mode.
Closes#11885
## Summary of the Pull Request
Currently, the TermControl and ControlCore recieve a settings object that implements `IControlSettings`. They use for this for both reading the settings they should use, and also storing some runtime overrides to those settings (namely, `Opacity`). The object they recieve currently is a `T.S.M.TerminalSettings` object, as well as another `TerminalSettings` object if the user wants to have an `unfocusedAppearance`. All these are all hosted in the same process, so everything is fine and dandy.
With the upcoming move to having the Terminal split into multiple processes, this will no longer work. If the `ControlCore` in the Content Process is given a pointer to a `TerminalSettings` in a certain Window Process, and that control is subsequently moved to another window, then there's no guarantee that the original `TerminalSettings` object continues to exist. In this scenario, when window 1 is closed, now the Core is unable to read any settings, because the process that owned that object no longer exists.
The solution to this issue is to have the `ControlCore`'s own their own copy of the settings they were created with. that way, they can be confident those settings will always exist. Enter `ControlSettings`, a dumb struct for just storing all the contents of the Settings. I used x-macros for this, so that we don't need to copy-paste into this file every time we add a setting.
Changing this has all sorts of other fallout effects:
* Previewing a scheme/anything is a tad bit more annoying. Before, we could just sneak the previewed scheme into a `TerminalSettings` that lived between the settings we created the control with, and the settings they were actually using, and it would _just work_. Even explaining that here, it sounds like magic, because it was. However, now, the TermControl can't use a layered `TerminalSettings` for the settings anymore. Now we need to actually read out the current color table, and set the whole scheme when we change it. So now there's also a `Microsoft.Terminal.Core.Scheme` _struct_ for holding that data.
- Why a `struct`? Because that will go across the process boundary as a blob, rather than as a pointer to an object in the other process. That way we can transit the whole struct from window to core safely.
* A TermControl doesn't have a `IControlSettings` at all anymore - it initalizes itself via the settings in the `Core`. This will be useful for tear-out, when we need to have the `TermControl` initialize itself from just a `ControlCore`, without being able to rebuild the settings from scratch.
* The `TabTests` that were written under the assumption that the Control had a layered `TerminalSettings` obviously broke, as they were designed to. They've been modified to reflect the new reality.
* When we initialize the Control, we give it the settings and the `UnfocusedAppearance` all at once. If we don't give it an `unfocusedAppearance`, it will just use the focused appearance as the unfocused appearance.
* The Control no longer can _write_ settings to the `ControlSettings`. We don't want to be storing things in there. Pretty much everything we set in the control, we store somewhere other than in the settings object itself. However, `opacity` and `useAcrylic`, we need to store in a handy new `RUNTIME_SETTING` property. We can write those runtime overrides to those properties.
* We no longer store the color scheme for a pane in the persisted state. I'm tracking that in #9800. I don't think it's too hard to add back, but I wanted this in front of eyes sooner than later.
## References
* #1256
* #5000
* #9794 has the scheme previewing in it.
* #9818 is WAY more possible now.
## PR Checklist
* [x] Surprisingly there wasn't ever a card or issue for this one. This was only ever a bullet point in #5000.
* A bunch of these issues were fixed along the way, though I never intended to fix them:
* [x] Closes#11571
* [x] Closes#11586
* [x] Closes#7219
* [x] Closes#11067
* [x] I think #11623 actually ended up resolving this one, but I'm double tapping on it here: Closes#5703
* [x] I work here
* [x] Tests added/passed
* [n/a] Requires documentation to be updated
## Detailed Description of the Pull Request / Additional comments
Along the way I tried to clean up code where possible, but not too agressively.
I didn't end up converting the various `MockTerminalSettings` classes used in tests to the x macros quite yet. I wanted to merge this with #11416 in `main` before I went too crazy.
## Validation Steps Performed
* [x] Scheme previewing works
* [x] Adjusting the font size works
* [x] focused/unfocused appearances still work
* [x] mouse-wheeling opacity still works
* [x] acrylic & cleartype still does the right thing
* [x] saving the settings still works
* [x] going wild on sliding the opacity slider in the settings doesn't crash the terminal
* [x] toggling retro effects with a keybinding still works
* [x] toggling retro effects with the command palette works
* [x] The matrix of (`useAcrylic(true,false)`)x(`opacity(50,100)`)x(`antialiasingMode(cleartype, grayscale)`) works as expected. Slightly changed, falls back to grayscale more often, but looks more right.
Since the settings UI's input fields behave similarly to the terminal's input,
`TerminalPage::_KeyDownHandler` also needs to behave similarly to
`TermControl::_KeyHandler`. This commit copies all relevant code
over from the latter into the former, including the suppression
of AltGr keys for keychord/action handling.
## PR Checklist
* [x] Closes#11788
* [x] I work here
* [x] Tests added/passed
## Validation Steps Performed
* Use a German keyboard layout
* Open 2 regular tabs and 1 settings tab and focus an input field
* AltGr+2 produces the character ² ✔️
* Ctrl+Alt+2 opens the second tab ✔️
This commit introduces "AtlasEngine", a new text renderer based on DxEngine.
But unlike it, DirectWrite and Direct2D are only used to rasterize glyphs.
Blending and placing these glyphs into the target view is being done using
Direct3D and a simple HLSL shader. Since this new renderer more aggressively
assumes that the text is monospace, it simplifies the implementation:
The viewport is divided into cells, and its data is stored as a simple matrix.
Modifications to this matrix involve only simple pointer arithmetic and is easy
to understand. But just like with DxEngine however, DirectWrite
related code remains extremely complex and hard to understand.
Supported features:
* Basic text rendering with grayscale AA
* Foreground and background colors
* Emojis, including zero width joiners
* Underline, dotted underline, strikethrough
* Custom font axes and features
* Selections
* All cursor styles
* Full alpha support for all colors
* _Should_ work with Windows 7
Unsupported features:
* A more conservative GPU memory usage
The backing texture atlas for glyphs is grow-only and will not shrink.
After 256MB of memory is used up (~20k glyphs) text output
will be broken until the renderer is restarted.
* ClearType
* Remaining gridlines (left, right, top, bottom, double underline)
* Hyperlinks don't get full underlines if hovered in WT
* Softfonts
* Non-default line renditions
Performance:
* Runs at up to native display refresh rate
Unfortunately the frame rate often drops below refresh rate, due us
fighting over the buffer lock with other parts of the application.
* CPU consumption is up to halved compared to DxEngine
AtlasEngine is still highly unoptimized. Glyph hashing
consumes up to a third of the current CPU time.
* No regressions in WT performance
VT parsing and related buffer management takes up most of the CPU time (~85%),
due to which the AtlasEngine can't show any further improvements.
* ~2x improvement in raw text throughput in OpenConsole
compared to DxEngine running at 144 FPS
* ≥10x improvement in colored VT output in WT/OpenConsole
compared to DxEngine running at 144 FPS
