Commit Graph

258 Commits

Author SHA1 Message Date
Christian Hergert
057bda6cd7 macos: register known clipboard types for drag destination 2021-06-17 13:23:18 -07:00
Zhi
5776fcd955 fix: make the new nsview as the first responder.
Make the new view as the first responder(focused) so the new view can
accept events from input method.

Fixes #3968.
2021-06-15 00:09:46 +08:00
Matthias Clasen
fff2b3c710 gdk: Clean up docs syntax
Replace leftover gtk-doc syntax (#Type) with backquotes.
2021-05-22 17:25:26 -04:00
Matthias Clasen
8ba16eb4f1 Documentation fixes
Mostly fixing up indentation of continuation lines,
and other small cleanups.
2021-05-20 19:17:49 -04:00
Tom Schoonjans
d5de73fb9d gdkmacosglcontext: fix compilation error
See https://developer.apple.com/documentation/appkit/nsopenglpixelformat/1436219-initwithattributes?language=occ
2021-03-24 10:08:11 +00:00
Emmanuele Bassi
6f93e63d21 docs: Move detached sections into their own content file 2021-03-11 16:37:30 +00:00
Matthias Clasen
e220b24b70 Merge branch 'wip/chergert/macos-gl-opaque-context' into 'master'
macos: make OpenGL context opaque when possible

See merge request GNOME/gtk!3226
2021-02-20 02:37:52 +00:00
Christian Hergert
ea0d487f0b macos: fix resizing of resizable windows on macOS 2021-02-19 15:43:49 -08:00
Christian Hergert
b2fd09625c macos: make OpenGL context opaque when possible
If our opaque region is the entire surface, then we can make the OpenGL
context opaque like we do for decorated windows. This improves performance
as the compositor does not need to blend the surface with the contents
behind the window.
2021-02-19 13:23:26 -08:00
Matthias Clasen
a4f17eaa8b macos: Apply popup shadow width 2021-02-14 10:52:33 -05:00
Emmanuele Bassi
435d12680d macos: Move from g_memdup() to g_memdup2()
The g_memdup() function is replaced by a safer version in newer versions
of GLib.
2021-02-11 14:22:22 +00:00
Christian Hergert
13e162c404 macos: improve use of swap rectangles with OpenGL 2021-02-08 11:30:11 -08:00
Christian Hergert
65296228d7 macos: only flush when not attached
This makes it so we only flush the context for the NSView, not the context
that is the center of our center of the GL context spokes.
2021-02-08 11:30:05 -08:00
Christian Hergert
443d199868 macos: mark region as unlikely 2021-02-08 11:29:56 -08:00
Thomas Holder
59806eee38 macOS: fix #2436 raise transient window on focus
Ported from gtk-3-24 e278f38905

Fixes https://gitlab.gnome.org/GNOME/gtk/-/issues/2436
2021-01-19 09:31:00 +01:00
Ignacio Casal Quinteiro
f5efb15cba Support stylus devices on macos 2021-01-11 11:41:00 +01:00
Christian Hergert
855b44f2ed macos: keep array of pasteboard types
To support Sierra, we need to have access to pasteboard types as a
NSString. Constants are provided in later versions of macOS, but we
can emulate that with an array which is initialized on first access.
2021-01-05 16:21:05 -08:00
Christian Hergert
7c9bc7a204 macos: supply NSPasteboardType when necessary
On older macOS systems, we might need to provide our own typedef
for the NSPasteboardType. It is just a NSString pointer anyway.
2021-01-05 13:54:07 -08:00
Christian Hergert
f4f104c9f9 macos: fix typedef on older macOS
On older systems, we don't have a typedef for gravity. They are a NSString
pointer and we can provide that manually just fine.
2021-01-05 13:53:22 -08:00
Christian Hergert
28a6f0df05 macos: handle point conversion on older macOS
On older systems, the availability of some methods seem to be incorrect
based on Apple documentation. This works around the issue by using
the rect conversion on older systems.
2021-01-05 13:52:11 -08:00
Christian Hergert
9320148d71 macos: implement compute_size and request_layout
These functions were not implemented when the sizing changes
landed before GTK 4 was released. This fixes an issue with non-
resizeable windows not reacting to layout changes.

Fixes #3532
2021-01-01 13:17:47 -08:00
Christian Hergert
ad617a0e06 macos: avoid setHasShadow unless shadow changes 2021-01-01 13:17:47 -08:00
Christian Hergert
62af8365f6 macos: fix toplevel present function prototype
No need to return anything here.
2021-01-01 13:17:47 -08:00
Christian Hergert
d888402bf9 macos: ensure GdkMacosWindow in surface discovery
We want to ignore windows that are not related to those controlled
by the GDK backend.

Fixes #3533
2020-12-31 10:55:50 -08:00
Ignacio Casal Quinteiro
4ad5e77907 macos: do not crash in mojave
The localizedName property is not available in Mojave
so just ifdef in that case the code out.
2020-12-31 11:35:04 +01:00
Tom Schoonjans
81c55b06d2 macos: fix typo that breaks compilation 2020-12-16 19:16:19 +00:00
Jonas Ådahl
142f7862ed gdk/toplevellayout: Change API to be about intent, not full state
When being fullscreen, and wanting to unfullscreen but not caring about
whether to go unmaximized or maximized (as this information is lost), if
the GdkToplevelLayout represents the full intended state, we won't be
able to do the right thing.

To avoid this issue, make the GdkToplevelLayout API intend based, where
if one e.g. doesn't call gdk_toplevel_set_maximized() with anything, the
backend will not attempt to change the maximized state.

This means we can also remove the old 'initially_maximized' and
'initially_fullscreen' fields from the private GtkWindow struct, as we
only deal with intents now.
2020-12-16 14:16:08 +01:00
Emmanuele Bassi
99e0929d6c build: Use a consistent style for Meson files 2020-12-15 12:46:59 +00:00
Emmanuele Bassi
7975bbfcaa build: Remove linker flags from static libraries
We only need hardening linker flags on the libgtk shared library;
internal static libraries don't really need them.
2020-12-15 11:36:20 +00:00
Christian Hergert
0236fe80c1 macos: fix macOS build breakage
Fixes breakages due to recent refactoring around sizing changes.
2020-12-08 11:29:31 -08:00
Matthias Clasen
1f141c1953 Merge branch 'wip/surface-state-rework' into 'master'
Rework surface state and geometry computation

See merge request GNOME/gtk!2885
2020-12-08 15:38:36 +00:00
Christian Hergert
6e0fffa0f8 macos: use CGLSetParameter and CGLEnable
We don't need to go through the NSOpenGLContext for these.
We can just use the C API directly. It's also clearer what is using
CGLEnable() vs CGLSetParameter().
2020-12-07 11:47:51 -08:00
Jonas Ådahl
d2c95a1b13 gdk: Replace 'WITHDRAWN' state with async 'is-mapped' boolean
It was used by all surfaces to track 'is-mapped', but still part of the
GdkToplevelState, and is now replaced with a separate boolean in the
GdkSurface structure.

It also caused issues when a widget was unmapped, and due to that
unmapped a popover which hid its corresponding surface. When this
surface was hidden, it emitted a state change event, which would then go
back into GTK and queue a resize on popover widget, which would travel
back down to the widget that was originally unmapped, causing confusino
when doing future allocations.

To summarize, one should not hide widgets during allocation, and to
avoid this, make this new is-mapped boolean asynchronous when hiding a
surface, meaning the notification event for the changed mapped state
will be emitted in an idle callback. This avoids the above described
reentry issue.
2020-12-07 20:37:30 +01:00
Jonas Ådahl
5eee1dfcd1 gdk/popup: Remove the popup-layout-changed signal
It was replaced with GdkSurface::layout.
2020-12-07 20:37:29 +01:00
Jonas Ådahl
6ee7535af0 gdk/toplevelsize: Rename 'margin' to 'shadow' and 'shadow_width'
This makes it more consistent with everywhere else.
2020-12-07 20:37:29 +01:00
Jonas Ådahl
42679f2903 gdk: Replace all GDK_CONFIGURE usage with GdkSurface::layout
This removes the GDK_CONFIGURE event and all related functions and data
types; it includes untested changes to the MacOSX, Win32 and Broadway
backends.
2020-12-07 20:37:29 +01:00
Christian Hergert
b431e39d4e macos: we only need 24-bit for color 2020-12-07 11:27:11 -08:00
Jonas Ådahl
3f96d4b6da gdk: Always get shadow width via GdkToplevelSize
This removes the gdk_surface_set_shadow_width() function and related
vfuncs. The point here is that the shadow width and surface size can now
be communicated to GDK atomically, meaning it's possible to avoid
intermediate stages where the surface size includes the shadow, but
without the shadow width set, or the other way around.
2020-12-07 09:46:39 +01:00
Christian Hergert
285781724f macos: set opengl view as opaque in opaque windows
We don't need the OpenGL view to be transparent if the window itself
is not transparent. This has the potential to speed up the compositing
of the GL view onto the NSWindow.
2020-12-06 20:14:52 -08:00
Emmanuele Bassi
f1ff8f9aad Merge branch 'wip/chergert/macos-decelerate' into 'master'
macos: fix typo when creating scroll events

Closes #3418

See merge request GNOME/gtk!2916
2020-12-03 22:54:46 +00:00
Christian Hergert
115ea624d9 macos: fix typo when creating scroll events
This fixes an issue where we would ignore events with Y delta
and no X delta while scrolling due to a typo when checking for
any delta.

This fixes deceleration of kinetic scrolling on the macOS backend.

Fixes #3418
2020-12-03 13:46:47 -08:00
Christian Hergert
92f0216605 macos: ensure element is part of queue
We don't want to risk decrementing length field unless this is actually
part of the queue.
2020-12-02 19:44:02 -08:00
Christian Hergert
e317b9be00 macos: maintain GList element consistency
We need to keep this consistent so that we can look things up
faster in other places. Therefore, just take the hit here and clear
the entire list ensuring prev/next poniters are cleared.
2020-12-02 19:44:01 -08:00
Christian Hergert
2e52386be5 macos: send focus-out event to windowing 2020-12-02 19:44:01 -08:00
Christian Hergert
9431c70a6a macos: freeze updates until surface is mapped
This more closely matches the X11 backend in terms of freezing
updates on the surface initially until we get mapped.
2020-12-02 19:44:01 -08:00
Christian Hergert
b38d0d7d9e macos: resign main/key when hiding window
This isn't done automatically for us, so we need to synthesize it in
our hide helper.

With this commit, we properly re-focus the new main/key window after
we have closed a transient-for window.
2020-12-02 11:36:38 -08:00
Christian Hergert
853a9c7a8c macos: disconnect frame clock when destroying surface 2020-12-02 11:35:02 -08:00
Christian Hergert
26b9254ac7 macos: track grab serial like other backends
This is what is done elsewhere, so copy that here too now that we actually
generate serials for events.
2020-12-02 11:34:31 -08:00
Christian Hergert
f11c23f407 Revert "macos: specify a window level for surfaces"
This reverts commit ca8b00e871.

This isn't needed and causes issues with other applications getting
stacked beneath our windows.
2020-12-02 11:15:57 -08:00
Christian Hergert
9b9fb4d7a3 macos: place above transient-for when presenting
We need to re-attach to the transient-for window whenever we present or
we risk getting placed behind the window by the display server. Apparently
that setting does not persist across a hide of the NSWindow.
2020-12-02 10:21:16 -08:00
Christian Hergert
ca8b00e871 macos: specify a window level for surfaces 2020-12-02 10:15:43 -08:00
Christian Hergert
27b9a9e7ef macos: glFlush() when switching GL contexts
The Mac OpenGL programming guide suggests that you glFlush() before changing
contexts to ensure that the commands have been submitted.
2020-12-01 16:19:04 -08:00
Christian Hergert
a020c901ba macos: treat some toplevel NSWindow like document windows
This makes the window animate in by the window manager like other
application windows on macOS. Currently ignored for transient windows.
2020-12-01 16:19:04 -08:00
Christian Hergert
f32ae2964a macos: fix various compiler warnings 2020-11-18 20:16:37 -08:00
Christian Hergert
dd7f52c59a macos: fix rendering artifacts with hover transitions
Using an image surface seems to fix some rendering artifacts when
performing cross-fade CSS transitions.
2020-11-17 18:20:55 -08:00
Christian Hergert
90141ef305 macos: use NSOpenGLContext directly for current tracking
We don't need to interact with GdkGLContext here to keep the
current context active.
2020-11-05 13:57:41 -08:00
Christian Hergert
bc05da8dc0 macos: explicitly request color and alpha sizes 2020-11-05 13:37:25 -08:00
Christian Hergert
bf3e1e5b40 macos: use opaque GL context when possible
This is better for situations where the window is decorated and therefore we can
rely on window system clipping of rounded corners.
2020-11-05 13:34:29 -08:00
Matthias Clasen
7f16067383 Merge branch 'wip/chergert/gdk-macos-gl-renderer' into 'master'
macos: gl context improvements and event cleanup

See merge request GNOME/gtk!2780
2020-11-05 02:21:02 +00:00
Christian Hergert
c31c3848df macos: fix calculation of mouse position
This fixes the calculation of the position of the pointer over the surface
which was incorrectly providing negative values.
2020-11-04 18:03:54 -08:00
Christian Hergert
65b2ea1888 macos: resize extra GL window/view when surface changes
Once we figure out what is going on with textures, changes are we'll be
able to let this stay a zero rect. But that is still a bit up in the air right now.
2020-11-04 17:21:21 -08:00
Christian Hergert
6309bd12ac macos: clip damage when swapping buffers
This ensures that we only copy the changed area.
2020-11-04 17:21:17 -08:00
Christian Hergert
7444a151b2 macos: remove synthesize_motion helper
We can use gdk_surface_request_motion() now instead of our extra
helper to do essentially the same thing.
2020-11-04 16:58:50 -08:00
Christian Hergert
ce9cc2db86 macos: always create dummy window/view for GL context
This simplifies the creation by always creating the dummy views, and then
removes it if necessary by detecting the begin_frame/end_frame pair.
2020-11-04 16:52:12 -08:00
Christian Hergert
d8192013f3 macos: add more aggressive clip to transparent subview
The Cairo implementation for the Macos backend uses a toplevel
window with full transparency and a series of NSView to create opaque
regions. This improves compositor performance because it allows the
display server to avoid costly blends.

However, we want to ensure we clip better when exposing the
transparent region so that we only expose the shadows/corners as
necessary.
2020-10-29 19:41:21 -07:00
Matthias Clasen
5a77994516 Merge branch 'matthiasc/for-master' into 'master'
Matthiasc/for master

See merge request GNOME/gtk!2760
2020-10-29 18:55:53 +00:00
Matthias Clasen
574a3a456d gdk: Drop GdkPoint from the api
This typedef was not used in any public APIs, and is
only used in the MacOS backend. It is not worth preserving
as public API, move it to the only user.
2020-10-29 14:23:46 -04:00
Christian Hergert
de9c9efa6f macos: implement GL context
This implements the basics for a GdkGLContext on macOS. Currently, rendering
only is fully working for the GskCairoRenderer case where we read back pixels
into a cairo surface for rendering. More work on synchronization is required for
the GL on GskGLRenderer case.

When we attempt to render a surface itself with GL, the context will ensure that
the new GdkMacosGLView is placed within the NSWindow. In other cases, we
use a dummy NSView and NSWindow for backing the NSOpenGLContext to
ensure that we can get accelerated drawing.

This gets GtkGLArea working when running with GSK_RENDERER=cairo.
2020-10-29 10:57:02 -07:00
Christian Hergert
eb809ba425 macos: tweak gravity while resizing
This helps a situation where the window contents has not changed
in time for a drawing. Setting the texture gravity helps that side or
corner to be less jittery while moving.

Ideally, we can get to a point where we are synchronized and keeping
up with drawing fast enough to not need this. That may require some
work to drive frame clocks from drawRect: though.
2020-10-29 10:57:02 -07:00
Christian Hergert
adf60fb3a1 macos: be tolerant of NULL GL context
Some code appears to unconditionally attempt to make the context current,
so this makes things tolerant to a NULL GdkGLContext and just return FALSE.
2020-10-29 10:57:02 -07:00
Christian Hergert
0040667965 macos: remove unused GL layer
This isn't being used, and instead we'll go the route of a NSView for
the OpenGL implementation.
2020-10-29 10:57:02 -07:00
Christian Hergert
60e67a62e6 macos: move setNeedsDisplay helper to GdkMacosCairoView
This isn't needed in the base class, which will eventually get a GL subclass.
2020-10-29 10:57:02 -07:00
Christian Hergert
eb82b2a9ca macos: fix discovery of surface under pointer 2020-10-19 12:35:41 -07:00
Christian Hergert
7ae8ed82c9 macos: fix fps calculation for frame timings
We need to mark the timings as complete after adding the
presentation time so that we have a valid FPS for the overlay
widget and/or fishbowl demo.
2020-10-15 21:04:51 -07:00
Christian Hergert
6e84c7c59e macos: fix discover of surface under cursor
This was incorrectly reporting the toplevel surface instead of the
popup surface that was placed above it. This fixes event delivery
to popups for selecting menu items and more.
2020-10-14 16:59:38 -07:00
Christian Hergert
0af3d21573 macos: only emit popup-layout-changed after initial present
Otherwise we risk being re-entrant where GtkPopover will not have a
GdkPopupLayout causing other issues.
2020-10-14 16:28:44 -07:00
Christian Hergert
e089bba4f5 macos: ensure we have access to a GdkMonitor 2020-10-14 16:28:44 -07:00
Christian Hergert
b462bc35c0 macos: allow pointer release event outside surface coords
This helps with grab situations so that we can end it when releasing
the pointer buttons outside of the window coordinates.
2020-10-14 15:45:50 -07:00
Christian Hergert
d700cfa2ef macos: break grabs after sending release event 2020-10-14 15:45:50 -07:00
Christian Hergert
cdb2c1698c macos: dont send crossing events during grab
Fixes an issue where we can't drag scrollbars or text selections while
outside of the application window.
2020-10-14 15:45:50 -07:00
Christian Hergert
9f01d4fe44 macos: fix coordinates and state when querying device
When querying a device, we need to ensure we are providing coordinates
in the coordinate system of the surface. Further, we need to actually
provide the button and keyboard state.

This fixes some issues related to dragging scrollbars and selecting list
box rows more reliably.
2020-10-14 11:34:44 -07:00
Christian Hergert
d5b5410b8f macos: use simple monotonic for event serial 2020-10-14 11:34:44 -07:00
Christian Hergert
d8ba916586 macos: add key equivalent helper
This is needed by quartz code in gtk/.
2020-10-09 20:03:52 -07:00
Christian Hergert
3f519e4d9b macos: remove workaround for scroll delta
This gets handled differently in gtk/ and so we shouldn't translate it here.
2020-10-09 20:02:38 -07:00
Christian Hergert
58f9413464 macos: track various changes in GDK 2020-10-09 20:02:18 -07:00
Christian Hergert
59cdd7ae69 macos: lookup NSEvent by translated GdkEvent
This will be needed by the quartz imcontext.
2020-10-09 19:59:21 -07:00
Christian Hergert
a30adfe1e0 macos: move input method names to private header 2020-10-09 19:56:21 -07:00
Matthias Clasen
929a56e53c Clean up lots of GTK+ -> GTK
Replace most remaining uses of GTK+ in the docs and
user-visible strings by GTK. Also remove some leftover
"Was added in 3.x" sentences from the docs.
2020-09-12 12:01:04 -04:00
Matthias Clasen
93078e52c0 gdk: Rename GdkSurfaceState to GdkToplevelState
That is what it is.

Fixes: #2790
2020-09-10 00:39:03 -04:00
Matthias Clasen
374c776749 macos: Stop setting the query_state vfunc 2020-08-26 17:56:41 -04:00
Matthias Clasen
b2c92392fc macos: Stop using _gdk_device_query_state
Directly use the backend implementation.
2020-08-26 17:56:41 -04:00
Björn Daase
6315cd977c *: Fix spelling mistakes found by codespell 2020-08-21 15:29:34 +02:00
Jonas Ådahl
2ff74eb667 gdk/toplevel: Negotiate surface size via a compute-size signal
GTK will not up front know how to correctly calculate a size, since it
will not be able to reliably predict the constraints that may exist
where it will be mapped.

Thus, to handle this, calculate the size of the toplevel by having GDK
emitting a signal called 'compute-size' that will contain information
needed for computing a toplevel window size.

This signal may be emitted at any time, e.g. during
gdk_toplevel_present(), or spontaneously if constraints change.

This also drops the max size from the toplevel layout, while moving the
min size from the toplevel layout struct to the struct passed via the
signal,

This needs changes to a test case where we make sure we process
GDK_CONFIGURE etc, which means we also needs to show the window and
process all pending events in the test-focus-chain test case.
2020-08-05 15:49:00 +02:00
Carlos Garnacho
46eb054337 gdk: Drop gdk_device_get_device_type()
There is no longer a hierarchy of devices, or none that is seen
on the outside.
2020-07-30 18:44:40 +02:00
Carlos Garnacho
398c1d1ad7 gdk/macos: Avoid gdk_device_get_associated_device()
Query the seat for that.
2020-07-30 18:17:42 +02:00
Benjamin Otte
13d3afa56e Remove unused GDK_HINT_POS 2020-07-30 17:06:15 +02:00
Benjamin Otte
3dd0e6d0b1 Remove gravity from GdkGeometry
It's always northwest
2020-07-30 17:06:15 +02:00
Benjamin Otte
11db6ad574 Remove aspect ratio from GdkGeometry
It's unused.
2020-07-30 17:06:15 +02:00
Benjamin Otte
ebcef256ab gdk: Remove unused flags 2020-07-30 17:06:15 +02:00
Benjamin Otte
b12b06e917 gdk: Remove base_size and increment from GdkGeometry
It's unused.
2020-07-30 16:55:45 +02:00
Jonas Ådahl
c7c71137b2 gdk/monitor: Remove gdk_monitor_work_area and GdkMonitor::work-area
It's not a portable API, so remove it. The corresponding backend
specific functions are still available, if they were implemented, e.g.
gdk_macos_monitor_get_workarea() and gdk_x11_monitor_get_workarea().
2020-07-29 17:57:30 +02:00
Carlos Garnacho
25ea17a6fc gdk: Drop source_device argument from _gdk_display_device_grab_update()
It's just passed around and used nowhere.
2020-07-29 01:27:51 +02:00
Carlos Garnacho
a2876b5cb4 gdkdevice: Remove gdk_device_get_state()
This is not needed nor recommended anymore, all reasons to maybe
need this were all kept within gdk.
2020-07-28 17:36:18 +02:00
Christian Hergert
0243736003 macos: support ARM/PowerPC time conversion for DisplayLink times
When converting DisplayLink frame presentation times, we need to take into
account the arch-specific types. This tracks changes in GNOME/GLib!1566 so
that precision is not lost.
2020-07-27 12:49:57 -07:00
Benjamin Otte
3078b180fe Replace "gdouble" with "double" 2020-07-25 00:47:36 +02:00
Benjamin Otte
d375dce9f5 Replace "gchar" with "char" 2020-07-25 00:47:36 +02:00
Benjamin Otte
d7266b25ba Replace "gint" with "int" 2020-07-25 00:47:36 +02:00
Christian Hergert
9dbf99d91a macos: prototype new GDK backend for macOS
This is fairly substantial rewrite of the GDK backend for quartz and
renamed to macOS to allow for a greenfield implementation.

Many things have come across from the quartz implementation fairly
intact such as the eventloop integration design and discovery of
event windows from the NSEvent.

However much has been changed to fit in with the new GDK design and
how removal of child GdkWindow have been completely eliminated.
Furthermore, the new GdkPopup allows for regular NSWindow to be used
to provide popovers unlike the previous implementation.

The object design more closely follows the ideal for a GDK backend.

Views have been broken out into subclasses so that we can support
multiple GSK renderer paths such as GL and Cairo (and Metal in the
future). However mixed mode GL and Cairo will not be supported. Currently
only the Cairo renderer has been implemented.

A new frame clock implementation using CVDisplayLink provides more
accurate information about when to draw drawing the next frame. Some
testing will need to be done here to understand the power implications
of this.

This implementation has also gained edge snapping for CSD windows. Some
work was also done to ensure that CSD windows have opaque regions
registered with the display server.

     ** This is still very much a work-in-progress **

Some outstanding work that needs to be done:

 - Finish a GL context for macOS and alternate NSView for GL rendering
   (possibly using speciailized CALayer for OpenGL).
 - Input rework to ensure that we don't loose remapping of keys that was
   dropped from GDK during GTK 4 development.
 - Make sure input methods continue to work.
 - Drag-n-Drop is still very much a work in progress
 - High resolution input scrolling needs various work in GDK to land
   first before we can plumb that to NSEvent.
 - gtk/ has a number of things based on GDK_WINDOWING_QUARTZ that need
   to be updated to use the macOS backend.

But this is good enough to start playing with and breaking things which
is what I'd like to see.
2020-07-21 14:45:12 -07:00