* WIP - Make EL2 DPI changes and implement on Windows (#895)
* Modify DPI API publicly and on Windows
* Add generic Position and make dpi creation functions const
* Make examples work
* Fix fullscreen windows not appearing
* Replace Logical coordinates in window events with Physical coordinates
* Update HiDpiFactorChanged
* Document to_static
* On Windows, make AdjustRect calls DPI-aware when possible (#1015)
* Use AdjustWidowRectExForDPI when available
* Prioritize presevering logical size when handling WM_DPICHANGED
* Format
* Add changelog entry
* macOS: Dpi overhaul (#997)
* WIP - Make EL2 DPI changes and implement on Windows (#895)
* Modify DPI API publicly and on Windows
* Add generic Position and make dpi creation functions const
* Make examples work
* Fix fullscreen windows not appearing
* Replace Logical coordinates in window events with Physical coordinates
* Update HiDpiFactorChanged
* Document to_static
* fix app_state errors
* fixes hidpi related errors in window_delegate
* fix bad merge
* dpi_factor edits in window_delegate
* fixes type and lifetime errors in window and window_delegate
* applies fmt
* complies with @aleksijuvani requested changes
* modifies Handler lifetimes
* fixes lifetime isues, adds propper handling for HiDpiChanged
* applies fmt
* restore original lifetimes
* solution is somewhere out there
* applies fmt
* pass as references
* resolves issue with HANDLER
* crate visible type error
* fixes visibility issues
* applies fmt
* deals with warnings
* simplifies new_inner_size setting algorthm
* moves proxy instead of referencing it and removes double deref from proxy.ns_window
* makes @Osspial tests (https://github.com/rust-windowing/winit/pull/997\#discussion_r301852354) pass
* complies with @aleksijuvani suggested changes
* makes max window size std::f32::MAX
* On Windows, fix new DPI API not setting window size properly (#1130)
* First attempt
* Second attempt
* Maintain cursor horizontal ratio
* Fix DPI change handling when maximized
* Revert window example
* Make new DPI code more understandable
* Format
* Implement DPI Usability Upgrades for X11 and Wayland (#1098)
* Fix compile errors
* Use `mio` for the X11 event loop
* Removes `calloop` from the X11 event loop, as the method of draining a
source using a closure provided to the `calloop::EventLoop` instance
conflicts with the need to deliver events directly to the callback
provided to `EventLoop::run`, in order to respond to the value provided by
`WindowEvent::HiDpiFactorChanged`.
* Implement interactive `HiDpiFactorChanged` event for X11
* Implement interactive `HiDpiFactorChanged` event for Wayland
* Run cargo fmt
* Fix Wayland not processing events from EventQueue
* Backport #981
* some lifetime tinkering
* finishes lifetime tinkering
* fixes all type errors
* adds support ffi functions
* adds wrappers for nonstatic events
* replaces events with event wrappers
* reimplementing hidpichanged event in app_state
* implements HiDpiFactorChanged for iOS
* applies formatter
* complies with @aleksijuvani requested changes
* resolves conflicts
* applies fmt
* removes merge blurp
* corrects state of CHANGELOG
* fix fmt check error
* fixes hidpi_factor for armv7-apple-ios
* WIP - Make EL2 DPI changes and implement on Windows (#895)
* Modify DPI API publicly and on Windows
* Add generic Position and make dpi creation functions const
* Make examples work
* Fix fullscreen windows not appearing
* Replace Logical coordinates in window events with Physical coordinates
* Update HiDpiFactorChanged
* Document to_static
* fix app_state errors
* fixes hidpi related errors in window_delegate
* fix bad merge
* dpi_factor edits in window_delegate
* fixes type and lifetime errors in window and window_delegate
* applies fmt
* complies with @aleksijuvani requested changes
* modifies Handler lifetimes
* fixes lifetime isues, adds propper handling for HiDpiChanged
* applies fmt
* restore original lifetimes
* solution is somewhere out there
* applies fmt
* pass as references
* resolves issue with HANDLER
* crate visible type error
* fixes visibility issues
* applies fmt
* deals with warnings
* simplifies new_inner_size setting algorthm
* moves proxy instead of referencing it and removes double deref from proxy.ns_window
* makes @Osspial tests (https://github.com/rust-windowing/winit/pull/997\#discussion_r301852354) pass
* complies with @aleksijuvani suggested changes
* makes max window size std::f32::MAX
Changes from rebasing:
* fixes compile errors
* applies fmt
* reimplements HiDpiFactorChanged after #1173 merge
* uses EventWrappers
* Fix compile errors
* Use `mio` for the X11 event loop
* Removes `calloop` from the X11 event loop, as the method of draining a
source using a closure provided to the `calloop::EventLoop` instance
conflicts with the need to deliver events directly to the callback
provided to `EventLoop::run`, in order to respond to the value provided by
`WindowEvent::HiDpiFactorChanged`.
* Implement interactive `HiDpiFactorChanged` event for X11
* Implement interactive `HiDpiFactorChanged` event for Wayland
* Run cargo fmt
* Fix Wayland not processing events from EventQueue
* Backport #981
* First attempt
* Second attempt
* Maintain cursor horizontal ratio
* Fix DPI change handling when maximized
* Revert window example
* Make new DPI code more understandable
* Format
* Modify DPI API publicly and on Windows
* Add generic Position and make dpi creation functions const
* Make examples work
* Fix fullscreen windows not appearing
* Replace Logical coordinates in window events with Physical coordinates
* Update HiDpiFactorChanged
* Document to_static
* On X11, make `WINIT_HIDPI_FACTOR` dominate `Xft.dpi` in some cases
This commit makes `WINIT_HIDPI_FACTOR` dominate `Xft.dpi` in general and
adds a special value `0` for `WINIT_HIDPI_FACTOR` to use winit computed
DPI factor with randr over Xft.dpi.
* Use `randr` instead of `0` for auto dpi scaling
* Update CHANGELOG
* blow up on wrong env var
* Allow empty string for env var
* Move DeviceEvent handling to the message target window.
Previously, device events seem to have only been sent to one particular
window, and when that window was closed Winit would stop receiving
device events. This also allows users to create windowless event loops
that process device events - an intriguing idea, to say the least.
* Emit LWin and RWin VirtualKeyCodes on Windows
* Implement ModifiersChanged on Windows
* Make ModifiersChanged a tuple variant instead of a struct variant
* Add changelog entries
* Format
* Update changelog entry
* Fix AltGr handling
* Reformat
* Publicly expose ModifiersChanged and deprecate misc. modifiers fields
* Change ModifiersState to a bitflags struct
* Make examples work
* Add modifier state methods
* all things considered, only erroring out in one file throughout all of these changes is kinda impressive
* Make expansion plans more clear
* Move changelog entry
* Try to fix macos build
* Revert modifiers println in cursor_grab
* Make serde serialization less bug-prone
* X11: Sync key press/release with window focus
* When a window loses focus, key release events are issued for all pressed keys
* When a window gains focus, key press events are issued for all pressed keys
* Adds `is_synthetic` field to `WindowEvent` variant `KeyboardInput`
to indicate that these events are synthetic.
* Adds `is_synthetic: false` to `WindowEvent::KeyboardInput` events issued
on all other platforms
* Implement windows focus key press/release on Windows
* Docs
Co-authored-by: Murarth <murarth@gmail.com>
* Register windowWillExitFullScreen
* On macOS: Do not toggle fullscreen during fullscreen transition
* Add CHANGELOG
Co-authored-by: Freya Gentz <zegentzy@protonmail.com>
* Add support for Windows Dark Mode
* Add is_dark_mode() getter to WindowExtWindows
* Add WindowEvent::DarkModeChanged
* Add support for dark mode in Windows 10 builds > 18362
* Change strategy for querying windows 10 build version
* Drop window state before sending event
Co-Authored-By: daxpedda <daxpedda@gmail.com>
* Change implementation of windows dark mode support
* Expand supported range of windows 10 versions with dark mode
* Use get_function! macro where possible
* Minor style fixes
* Improve documentation for ThemeChanged
* Use `as` conversion for `BOOL`
* Correct CHANGELOG entry for dark mode
Co-authored-by: daxpedda <daxpedda@gmail.com>
Co-authored-by: Osspial <osspial@gmail.com>
* Implement revamped `RedrawRequested` on iOS
* Added RedrawEventsCleared to events_cleared logic
* Fixed from comments
* Added RedrawEventsCleared to draw_rect handler.
* Fixed out of order `RedrawEventsCleared` events.
* cargo fmt
* Implement changes to `RedrawRequested` event
Implements the changes described in #1041 for the X11 platform and for
platform-independent public-facing code.
* Fix `request_redraw` example
* Fix examples in lib docs
* Only issue `RedrawRequested` on final `Expose` event
Mutter can reposition window on resize, if it is behind mutter's "bounding box".
So, when you start winit window in maximized mode with CSD, mutter places its CSD
behind the GNOME's status bar initially, and then sends configure with the
exact same size as your current window. If winit decides to optimize calling
frame.resize(..) in this case, we won't call set_geometry(we're calling
it through resize) and GNOME won't reposition your window to be inside the
"bounding box", which is not a desired behavior for the end user.
* Add ModifiersChanged event for macOS
This implements the macOS portion of #1124.
* Fix ModifiersChanged event import
* Fix event passing window instead of device id
* X11: Report `CursorMoved` when touch event occurs
* Only trigger CursorMoved events for the first touch ID
* Fix testing for current touch events
* Fix first touch logic
* X11: Sync key press/release with window focus
* When a window loses focus, key release events are issued for all pressed keys
* When a window gains focus, key press events are issued for all pressed keys
* Adds `is_synthetic` field to `WindowEvent` variant `KeyboardInput`
to indicate that these events are synthetic.
* Adds `is_synthetic: false` to `WindowEvent::KeyboardInput` events issued
on all other platforms
* Clarify code with comments
* X11: Fix incorrect modifiers when events are missed
* Syncs modifier state with state data in X key/button/motion events.
* Fixes modifier state in XWayland, as xinput2 raw input events will
not be received when a window does not have focus.
* Removes `impl From<_> for ModifiersState` on X11/Wayland API types,
replacing them with `pub(crate)` methods.
* Cleanup modifier state update using a macro
* Remove keys from modifier state when updating
* X11: Fix window creation hangs when another application is fullscreen
Previously, the X11 backend would block until a `VisibilityNotify` event
is received when creating a Window that is visible or when calling
`set_visible(true)` on a Window that is not currently visible. This
could cause winit to hang in situations where the WM does not quickly
send this event to the application, such as another window being
fullscreen at the time.
This behavior existed to prevent an X protocol error caused by setting
fullscreen state on an invisible window. This fix instead stores desired
fullscreen state when `set_fullscreen` is called (iff the window is not
visible or not yet visible) and issues X commands to set fullscreen
state when a `VisibilityNotify` event is received through the normal
processing of events in the event loop.
* Add window_debug example to facilitate testing
* Add a CHANGELOG entry
* Call `XUnmapWindow` if `VisibilityNotify` is received on an invisible window
* Prevent EventLoop from getting initialized outside the main thread
This only applies to the cross-platform functions. We expose functions
to do this in a platform-specific manner, when available.
* Add CHANGELOG entry
* Formatting has changed since the latest stable update...
* Fix error spacing
* Unix: Prevent initializing EventLoop outside main thread
* Updates libc dependency to 0.2.64, as required by BSD platforms
* Update CHANGELOG.md for Linux implementation
* Finish sentence
* Consolidate documentation
* Fix so the compiler can infer msg_send! return type
Currently, due to a quirk in Rust's type inference interacting with the
structure of the msg_send! macro, a () return type will be inferred when
the compiler cannot otherwise determine the return type. This behavior
is expected to change, and in the future could resolve to a ! return
type, which results in undefined behavior.
Linting has previously been added for this in rust-lang/rust#39216, but
it did not catch these cases due to SSheldon/rust-objc#62. An upcoming
version of objc will be fixed to stop hiding these errors, at which
point they will become compile errors.
This change fixes these errors and allows winit to compile with the
fixed version of objc.
* Bump cocoa to 0.19.1
Adds fullscreen using native web APIs to the stdweb and web-sys backends.
Due to limitations of browser APIs, requests for fullscreen can only be fulfilled during a short-lived user-triggered event. This commit does automatically handle that under the hood, but it does introduce unavoidable latency in full-screening the canvas.
* Expose HINSTANCE now using a getter function
* Missing changes
* remove unused import
* Required changes for the PR
* Rust fmt
* Use GetWindowLong
* Use GetWindowLong
* Fixed relative_pointer not being set up when the "zwp_relative_pointer_manager_v1" callback comes after the "wl_seat" callback
* Ran cargo fmt
* Updated changelog
* Added wayland support for set_grab_cursor and set_cursor_visible
* Updated changelog
* Ran cargo fmt
* Fixed set_cursor_visible and set_cursor_grab so they can be called from any thread.
* Ran cargo_fmt
* Improved CHANGELOG
* Added workaround so that when cursor is hidden it takes effect before the cursor enters the surface. Making the cursor visible again still only happens once the cursor re-enters the surface
* Switched to using Rc<RefCell> instead of Arc<Mutex> since all accesses to the relative_pointer_manager_proxy will happen on the same thread.
* Forgot to run cargo fmt
* Switched to using Rc and RefCell instead of Arc and Mutex where applicable.
* Improved comments and documentation relating to changing a hidden cursor back to visible on wayland.
* Wayland: Fixed cursor not appearing immendiately when setting the cursor to visible.
* Forgot to run cargo fmt
* Switched to only storing the pointers in CursorManager as AutoPointer.
* Fixed typo and removed println
* Update CHANGELOG.md
Co-Authored-By: Kirill Chibisov <wchibisovkirill@gmail.com>
* Fixed relative_pointer not being set up when the "zwp_relative_pointer_manager_v1" callback comes after the "wl_seat" callback
* Ran cargo fmt
* Updated changelog
* Improved CHANGELOG
* Switched to using Rc<RefCell> instead of Arc<Mutex> since all accesses to the relative_pointer_manager_proxy will happen on the same thread.
* Forgot to run cargo fmt
* X11: Fix panic when no monitors are available
* Set dummy monitor's dimensions to `(1, 1)`
* X11: Avoid panicking when there are no monitors in Window::new
* Allow using multiple `XWindowType`s on X11 (#1140)
* Update documentation to make combining window types clearer
* Update build flags because X11 runs on more than just Linux
* Revert "Update build flags because X11 runs on more than just Linux"
This reverts commit 882b9100462a5ee0cf89dcd42891ebd0f709964f.
* Revert "Update documentation to make combining window types clearer"
This reverts commit da00ad391a8ce42cea08b577b216316b013f9e36.
* Revert "Allow using multiple `XWindowType`s on X11 (#1140)"
This reverts commit a23033345697463400286c4d297f5c1552369fc2.
* Allow using multiple `XWindowType`s on X11 (slice variant) (#1140)
* Multiple `XWindowType`s, with non-static lifetime.
* Multiple `XWindowType`s (#1140) (`Vec` variant)
* Append change to changelog.
* Fix formatting.
* Keep track of what windows have requested redraw
Instead of using request_animation_frame and sending redraw request
events, just keep track of all windows that have asked for a redraw.
This doesn't handle dispatching the events
* Issue redraw events to windows that request it
* Cargo fmt
* Use actual numeric IDs to differentiate Windows
This is generally important to identifying which window should
recieve which event, but is also specifically crucial for fixing
RedrawRequested on web.
* Cargo fmt
* Flush high surrogate if not followed by low surrogate
* Remove transmute from WM_CHAR handler
* Fix window_state being locked while dispatching ReceivedCharacter for surrogate codepoints.
* Format
Just before starting to poll/wait on calloop(mio), check if there
are already events pending in the internal buffer of our wayland
event queue. If so, dispatch them and force an instant wakeup from
the polling, in order to behave as if we were instantly woken up by
incoming wayland events.
When using OpenGL, mesa shares our wayland socket, and also reads
from it, especially if vsync is enabled as it'll do blocking reads.
When doing so, it may enqueue events in the internal buffer of our
event queue.
As the socket has been read, mio will thus not notify it to calloop
as read, and thus calloop will not know it needs to dispatch. In some
cases this can lead to some events being delivered much later than
they should. Combined with key repetition this can actually cause some
flooding of the event queue making this effect event worse.
Fixes#1148
* Add touch pressure information for touch events on Windows
* Modified CHANGELOG.md and FEATURES.md to reflect changes
* Updated documentation of struct Touch to reflect changes
* Replaced mem::uninitalized() with mem::MaybeUninit
Fixed warnings in platform_impl/windows/dpi.rs
* fix#1087. the CFRunLoopTimer was never started if the user never changed the controlflow.
* RedrawRequested ordering matches the new redraw api
consistent asserts
lots of appstate refactoring to rely less on unsafe, and hopefully make it easier to maintain
* ios: dpi bugfix. inputs to setContentScaleFactor are not to be trusted as iOS uses 0.0 as a sentinel value for "default device dpi".
the fix is to always go through the getter.
* move touch handling onto uiview
* update changelog
* rustfmt weirdness
* fix use option around nullable function pointers in ffi
* Document why gl and metal views don't use setNeedsDisplay
* change main events cleared observer priority to 0 instead of magic number
log when processing non-redraw events when we expect to only be processing redraw events
* X11: Fix performance issue with rapidly resetting cursor icon
* When setting cursor icon, if the new icon value is the same as the
current value, no messages are sent the X server.
* X11: Cache cursor objects in XConnection
* Add changelog entry
* iOS os version checking
* iOS, fix some incorrect msg_send return types
* address nits, and fix OS version check for unsupported os versions
* source for 60fps guarantee
* macOS/iOS: Fix auto trait impls of `EventLoopProxy`
`EventLoopProxy<T>` allows sending `T` from an arbitrary thread that
owns the proxy object. Thus, if `T` is `!Send`, `EventLoopProxy<T>` must
not be allowed to leave the main thread.
`EventLoopProxy<T>` uses `std::sync::mpsc::Sender` under the hood,
meaning the `!Sync` restriction of it also applies to
`EventLoopProxy<T>`. That is, even if `T` is thread-safe, a single
`EventLoopProxy` object cannot be shared between threads.
* Update `CHANGELOG.md`
* Stop appending canvas to document in web platform
* Remove `tabindex` TODO in web backend
* Return `OsError` instead of panicking on web canvas creation
* Add exclusive fullscreen mode
* Add `WindowExtMacOS::set_fullscreen_presentation_options`
* Capture display for exclusive fullscreen on macOS
* Fix applying video mode on macOS after a fullscreen cycle
* Fix compilation on iOS
* Set monitor appropriately for fullscreen on macOS
* Fix exclusive to borderless fullscreen transitions on macOS
* Fix borderless to exclusive fullscreen transition on macOS
* Sort video modes on Windows
* Fix fullscreen issues on Windows
* Fix video mode changes during exclusive fullscreen on Windows
* Add video mode sorting for macOS and iOS
* Fix monitor `ns_screen` returning `None` after video mode change
* Fix "multithreaded" example on macOS
* Restore video mode upon closing an exclusive fullscreen window
* Fix "multithreaded" example closing multiple windows at once
* Fix compilation on Linux
* Update FEATURES.md
* Don't care about logical monitor groups on X11
* Add exclusive fullscreen for X11
* Update FEATURES.md
* Fix transitions between exclusive and borderless fullscreen on X11
* Update CHANGELOG.md
* Document that Wayland doesn't support exclusive fullscreen
* Replace core-graphics display mode bindings on macOS
* Use `panic!()` instead of `unreachable!()` in "fullscreen" example
* Fix fullscreen "always on top" flag on Windows
* Track current monitor for fullscreen in "multithreaded" example
* Fix exclusive fullscreen sometimes not positioning window properly
* Format
* More formatting and fix CI issues
* Fix formatting
* Fix changelog formatting
* Process WM_SYSCOMMAND to forbid screen savers in fullscreen mode
Fixes#1047
* Update CHANGELOG.md and documentation to reflect changes from issue #1065
* Updated documentation of window.Window.set_fullscreen to match the documentation of window.WindowBuilder.with_fullscreen.
* Touch events emit screen coordinates instead of client coordinates on Windows
Fixes#1002
* Don't lose precision of WM_TOUCH events when converting from screen space to client space
* Updated CHANGELOG.md to reflect changes from issue: #1042
* Replace `std::mem::uninitialized` with `MaybeUninit`
* Avoid undefined behavior when using `MaybeUninit`
* Restore unused `PointerState` fields as internally public
* Zero-initialize some struct values in Xlib FFI calls
* Reform usage of `MaybeUninit` in Xlib FFI
* Prefer safe zero-initialization using `Default`, when possible
* Zero-initialize integers and floats using `0` or `0.0`
* Use `MaybeUninit::uninit` for large byte buffers and union types
* Use `MaybeUninit::uninit` when the resulting value is ignored
* Fix old `use` declarations
* Fix hidden lifetime parameter
* Fix missing methods in `web::Monitor`.
Originally fixed by @ryanisaacg in 94387c4bf5bca35f4e24562ce89a4f4badd53aa8.
* Disable some tests and examples on `wasm32`
* Fix issues with redraw_requested when called during EventsCleared
* Format
* Fix event dispatch after RedrawRequested but before EventsCleared
This could happen if the event queue was cleared, we processed WM_PAINT,
but the event queue got re-filled before we checked to see it was empty.
* Fix paint ordering issues when resizing window
* Format
* Make FileDropHandler::iterate_filenames more robust
by replacing the call to mem::uninitialized with mem::zeroed and change
file name retrieval to use buffers of exact length as reported
by DragQueryFileW instead of relying on MAX_PATH.
* Change remaining calls of uninitialized to zeroed
* Run rustfmt
* Add CHANGELOG entry and comment
Internally, `XFlush` calls `_XSend` to write data. It then calls
`XEventsQueued(display, QueuedAfterReading)`, which reads data from the
X server connection. This prevents the event loop source callback from
being run, as there is no longer data waiting on the socket.
Ideally, we would want to call `_XSend` directly to ensure that no
output is buffered by Xlib. However, this function is not exported as
part of Xlib's public API.
Testing with the `XFlush` call removed does not appear to adversely
affect the performance of an application. If any bugs should eventually
arise from this change, perhaps another function may be used in place of
`XFlush`, such as `XPending`, which writes buffered output but does not
so aggressively read from the X server connection.
Closes#865
* Add relative pointer movement for Wayland
* Format changed code with rustfmt
* Wayland: merge window and device event queues into one
* Replace map_or_else call for simplification
* Format everything and add rustfmt to travis
* Remove extern crate winit from examples and add force_multiline_blocks
* Format the code properly
* Fix inconsistent period in PULL_REQUEST_TEMPLATE.md
* Only run rustfmt on nightly
* Travis fixings
This decorelates the window management from the actual user content,
meaning:
- the created window no longer needs the user to draw something to
start existing
- it reduces our need to do roundtrips during initialization to
avoid protocol errors
* Support listing available video modes for a monitor
* Use derivative for Windows `MonitorHandle`
* Update FEATURES.md
* Fix multiline if statement
* Add documentation for `VideoMode` type
* Fix request_redraw with Poll and WaitUntil(time_in_the_past) on Windows
`Window::request_redraw` now fires a `RedrawRequested` event when
called from an `Event::EventsCleared` callback while the control
flow is set to `Poll`. A control flow of `WaitUntil(resume_time)`,
will now also fire the `RedrawRequested` event when `resume_time`
is in the past.
* Prevent panic on x11 when WaitUntil(resume_time) is in the past
* Prevent panic on wayland when WaitUntil(resume_time) is in the past
* First name consistency pass. More to come!
* Remove multitouch variable (hopefully this compiles!)
* Remove CreationError::NotSupported
* Add new error handling types
* Remove `get_` prefix from getters.
This is as per the Rust naming conventions recommended in
https://rust-lang-nursery.github.io/api-guidelines/naming.html#getter-names-follow-rust-convention-c-getter
* Make changes to Window position and size function signatures
* Remove CreationError in favor of OsError
* Begin updating iOS backend
* Change MonitorHandle::outer_position to just position
* Fix build on Windows and Linux
* Add Display and Error implementations to Error types
* Attempt to fix iOS build.
I can't actually check that this works since I can't cross-compile to
iOS on a Windows machine (thanks apple :/) but this should be one of
several commits to get it working.
* Attempt to fix iOS errors, and muck up Travis to make debugging easier
* More iOS fixins
* Add Debug and Display impls to OsError
* Fix Display impl
* Fix unused code warnings and travis
* Rename set_ime_spot to set_ime_position
* Add CHANGELOG entry
* Rename set_cursor to set_cursor_icon and MouseCursor to CursorIcon
* Organize Window functions into multiple, categorized impls
* Improve clarity of function ordering and docs in EventLoop
* port ios winit el2.0 implementation to the new rust-windowing repo
* unimplemented! => unreachable
trailing comma in CFRunLoopTimerCallback
* implement get_fullscreen
* add iOS specific platform documentation. Add a TODO about how to possibly extend the iOS backend to work have methods callable from more than just the main thread
* assert that window is only dropped from the main thread
* assert_main_thread called from fewer places
