Replaces the (temporary) compile-time option to pass engine switches
with the ability to pass them temporarily at runtime via environment
variables.
This is enabled only for debug/profile to avoid potential issues with
tampering with released applicaitons, but if there is a need for that in
the future it could be added (potentially with a whitelist, as is
currently used for Dart VM flags).
Windows portion of:
https://github.com/flutter/flutter/issues/38569https://github.com/flutter/flutter/issues/60393
Originally font change notification was handled by forwarding
WM_FONTCHANGE to the Flutter HWND, to avoid adding new API surface, but
that's not a good solution in a multi-window scenario, and it would
require a completely different solution for UWP. It also requires
non-obvious plumbing in the runner.
This replaces that with an explicit API, so that there's a clean and
obvious way for the runner to trigger this event.
- Standardize on lowercase for windows.h
- Don't define NOMINMAX before including windows.h in (some) public
wrapper headers, since it causes a warning when combined with setting
NOMINMAX at the build level, which is the more robust way to avoid
issues with min/max and windows.h
Adds APIs for runners to delegate WindowProc handlers into the Flutter
engine, and for plugins to register as possible delegates.
This allows for plugins to alter top-level window behavior in ways that
can only be done from the WindowProc, such as resize control. This
functionality remains entirely on the native side, so is synchronous.
Part of https://github.com/flutter/flutter/issues/53168
Relands https://github.com/flutter/engine/pull/20399
Makes BinaryMessenger available from FlutterEngine, rather than just the plugin registrar. This allows for method channels directly in applications without building them as plugins, and matches the other platforms.
Requires some restructuring of code and GN targets in the client wrappers to make the internals in the shared section usable by the implementations of platform-specific parts of the wrappers. Also fixes a latent issue with EnableInputBlocking symbols being declared but not defined for Windows that came up during testing of the restructing.
Fixes https://github.com/flutter/flutter/issues/62871
Makes BinaryMessenger available from FlutterEngine, rather than just the plugin registrar. This allows for method channels directly in applications without building them as plugins, and matches the other platforms.
Requires some restructuring of code and GN targets in the client wrappers to make the internals in the shared section usable by the implementations of platform-specific parts of the wrappers. Also fixes a latent issue with EnableInputBlocking symbols being declared but not defined for Windows that came up during testing of the restructuring.
Fixes https://github.com/flutter/flutter/issues/62871
Changes the interaction between the view controller and engine in both the C API and
the engine API, so that there's always an engine (as on other platforms) rather than
the engine APIs being specific to headless mode.
While adjusting the C API, this does a large cleanup:
- Renames all methods to follow a `FlutterDesktop` (prefix) + "class" name + method-style name.
E.g., `FlutterDestkopViewControllerCreate` rather than `FlutterDesktopCreateViewController`.
This makes it easier to see what functions operate on which conceptual "object" in the API.
- Reorders and groups them by the object they operate on.
Fixes https://github.com/flutter/flutter/issues/61966
Refactors the Windows embedding internals to make an engine object that
owns things associated with the engine rather than the view, and updates
the API surface to allow using the engine directly.
This is an incremental step toward both a cleaner, non-struct-based
internal structure and a finalized API surface.
- Adds a way to provide an AOT library to the C API.
- Adds app.so to the information provided by DartProject.
- Fixes the engine to only do static snapshot linking for Windows in
debug mode, not all modes, so that the provided library is used.
Engine side of https://github.com/flutter/flutter/issues/38477
This is a step toward aligning the API with macOS, and will make it easier to add the precompiled library later for release mode (since it can just be added to the project directory, without any code changes required for wrapper clients).
At the C API, uses a struct instead of individual arguments, mirroring a change that was already made on the Linux side to make the C API cleaner.
Functional changes in addition to the restructuring:
adds relative path support, as was recently added for GLFW
Uses wstring, rather than string, for paths; the conversion to UTF-8 is actually a potential problem on Windows, so pushing it into the embedding allows us the possibility of removing it later (if we can figure out a good solution at the embedder.h layer) without API breakage.
The old APIs used by the standard runner are left in place for now to avoid breaking the template on an engine roll. Once the framework template has been updated, the old API paths will be removed.
This was only necessary when the Engine had to build in multiple buildroots
where the sources where checked out at different paths relative to the
buildroot. This is no longer the case and there are already cases GN rules
have been written that mix and match variable usage with the direct
specification of the path to the Flutter sources relative to the sole buildroot.
plugin_registrar_windows.h was never fully updated for the Win32 switch,
and didn't actually compile. This introduces FlutterView (parallel to
the GLFW wrapper's FlutterWindow) as a ways of holding view-specific
functionality to expose via the plugin registrar, and moves HWND access
from the FlutterViewController to the FlutterView so that it's
available to plugins. This allows the implementation of plugins that need
access to the native HWND (e.g., moving or resizing the top-level window).
Adds simple unit tests of the new wrapper functionality, ensuring that the
files actually compile, and that the passthroughs work as expected.
This is a breaking change for Windows runners due to moving
GetNativeWindow() in the wrapper. It's not being done as a multi-stage
change (addition + deprecation + later removal) since this API is explicitly
unstable.
Adds a task runner, and exposes API to allow application-level runloops to know when they need to next call the API to process engine events. Internally, sends null events to wake up the app runloop when new events are scheduled to ensure the wait time is updated accordingly.
Fixes#36420
Makes the plugin registration structure consistent with macOS. This will
be used in generated plugin registrant files rather than a specific
implemenation class, so this helps unblock the creation of generated
registrants on Windows and Linux.
* Begin API evolution to a more native win32 API
* Child-window based hosting
* Plumb through an initial size for child window to avoid reallocated surface on start
* Windows API cleanup part 1
* Fix wrapper tests
* Ensure flutter's HWND resources are destroyed
* Final API cleanup
* Fix dynamic DPI handling
* Cleanup
* Fix a bug that was causing engine to not be shutdown correctly
* CR feedback
* auto format
* CR feedback: combine FlutterView and FlutterViewController
* The one that clang-format seems to always get wrong
* expletive
* fix sources for licesnse file
* CR Feedback
* cleanup
* Update GetNativeWindow() to return an HWND rather than a long
* fix formatting
Start work on flutter/flutter#30726 by adding an alternative win32 shell platform implementation for Windows that is not based on GLFW and that uses LIBANGLE for rendering and native win32 windowing and input. This change does not replace the GLFW implementation but rather runs side by side with it producing a secondary flutter_windows_win32.dll artifact. The following items must be added to attain parity with the GLFW implementation:
- Custom task scheduling
- Support for keyboard modifier keys
- Async texture uploads
- Correct high DPI handling on Windows versions < 1703
and will be added in subsequent changes.
