Instead of using the incomplete GTK-internal emulation, use the WM_CHAR
messages sent by Windows. Make the IME input method the default for all
languages on Windows.
If GLES support is enabled on Windows, force GLES mode if we are running
on a ARM64 version of Windows (i.e. Windows 10 for ARM).
This is required as ARM64 versions of Windows only provide a software
implementation of OpenGL 1.1/1.2, which is not enough for our purposes.
Thus, we could make instead use the GLES support provided via Google's
libANGLE (which emulates OpenGL/ES 3 with Direct3D 9/11), so that we
can run GtkGLArea programs under OpenGL/ES in ARM64 versions of Windows.
Note that eventually we could update the libepoxy build files for Windows
to not check nor enable WGL when building for ARM64 Windows, as the WGL
items do not work, although they do build.
Instead of hardcoding gtk-xft-antialias, use SPI_GETFONTSMOOTHING to
determine whether antialiasing is enabled.
Make gtk-xft-rgba query more complex - try to determine display
orientation, then use that to rotate subpixel structure. This
won't help with monitors that have naturally vertical subpixels,
but should improve things for monitors that are rotated (as long
as Windows display settings are adjusted accordingly).
Partially fixes#1774
This reverts commit fc2008f240.
Turns out, we *don't* have code to maintain Z-order. Restacking
code is not doint that, it just enforces a few weird Z-order-related
behaviours.
With C compilers defaulting to -fcommon, this isn't an issue, but
upcoming compilers (GCC 10 and Clang 11) will default to -fno-common,
ending up with duplicate definitions of this variable.
With some GL drivers, it may be the case that menus are not shown
correctly in fullscreen GL windows because DWM is deactivated in the
process.
Force WS_BORDER to be applied to the fullscreen GL window so that we have
a small 1px border when needed (by setting an envvar), so that DWM does
not get deactivated, hence enabling the menus to show. Also, when we
force WS_BORDER to be applied in this situation, we also deliberately
place the window just outside the top lefthand corner of the screen by
1px and make the window 1px larger than the screen size, so that we
effectively hide the 1px border from view.
Fixes issue #1702.
We also need to force redraw of the whole window when we are using
EGL/ANGLE during un-fullscreen, so that we do not get glitches in the
resulting window.
_gdk_win32_display_convert_selection() does not return anything,
it generates a selection notify event instead. Depending on how
successful it was, the event will have property=GDK_NONE or
property="GDK_SELECTION".
property="GDK_SELECTION" is the default return value for successful
cases, and it tells GTK to grab the data that GDK previously deposited
using selection_property_store().
The problem is that the clipboard branch of this function calls
open_clipboard_timeout(), which can't return anything meaningful (it's
normally a timeout function), and thus doesn't know whether the function
succeeded or failed. Due to my oversight, this resulted in GDK
generating two selection notification events - one from inside of
open_clipboard_timeout() (with the right property, if successful),
and one from the catch-all last line (always defaulting to "GDK_SELECTION").
This caused issue #2223, where GTK only expected exactly one
notification per request, and got confused because it was getting two.
I've looked at the code in open_clipboard_timeout(), and it seems to me
that it always generates a notification (a successful one or an
unsuccessful one). Thus the branch of the function that calls it
directly does not need to follow up with a catch-all notification and
can just return.
This seems to be fixing issue #2223, at least for me, but i'm not
entirely sure that this will not have any adverse side-effects.
Clipboard handling in GTK3 is a complicated mess.
Use RemoveClipboardFormatListener() and AddClipboardFormatListener().
These APIs remove the need for us to maintain the integrity of the
clipboard chain, which turned out to be problematic for some reason
that is yet to be identified.
Fixes#2215Fixes#442
This will ensure that the version info is easily visible from the
GDK/GTK+ DLLs, and ensure that the print dialogs will have a more modern
look and feel.
ImmIsIME() doesn't work (always returns TRUE) since Vista.
Use ITfActiveLanguageProfileNotifySink to detect TSF changes,
which are equal to IME changes for us.
Also make sure that IMMultiContext re-loads the IM when keyboard layout
changes, otherwise there's a subtle bug that could happen:
* Run GTK application with non-IME layout (US, for example)
* Focus on an editable widget (GtkEntry, for example)
* IM Context is initialized to use the simple IM
* Switch to an IME layout (such as Korean)
* Start typing
* Since IME module is not loaded yet, keypresses are handled
by a default MS IME handler
* Once IME commits a character, GDK will get a WM_KEYDOWN,
which will trigger a GdkKeyEvent, which will be handled by
an event filter in IM Context, which will finally re-evaluate
its status and load IME, and only after that GTK will get
to handle IME by itself - but by that point input would
already be broken.
To avoid this we can emit a dummy event (with Void keyval),
which will cause IM Context to load the appropriate module
immediately.
We need to call g_strdup() on the name that we pass in for notifying the
GDK_SETTING event so that when we do gdk_event_free() later we will not
get a crash (stack corruption) that results from attempting to g_free()
something that is not dynamically allocated.
This makes apps use "Segoe UI 9" by default instead of whatever matches "Sans 10".
It also cleans up the code and uses some new pango API while at it.
This was previously disabled in 9e686d1fb5 because it led to a poor glyph coverage
on certain versions of Windows which don't default to "Segoe UI 9" (Chinese, Korean, ..)
because the font fallback list was missing in pango.
This is about to get fixed in https://gitlab.gnome.org/GNOME/pango/merge_requests/34
so enable it again when we detect a new enough pango version.
Enables hinting, antialiasing and set the subpixel orientation according to the
active clear type setting. This ensures that font rendering with the fontconfig backend
looks similar to the win32 backend, at least with the default system font.
GTK widgets expect the scroll deltas to be 1 or -1 and calculate a scroll value from that.
Multiplying the delta by the Windows scroll line setting (which defaults to 3) results
in a much larger delta and vastly different behaviour for running a GTK app on Windows
vs on Linux. For example text view and tree view scroll by 9 lines per scroll wheel tick
per default this way while on Linux it is around 3.
Remove the multiplication for now.
Do not lie to W32 about the formats that we provide or accept.
Originally the logic behind such lies was that GdkPixbuf allows
us to convert any supported image to BMP or PNG, and therefore
we should announce that we always provide/accept BMP and PNG along
with other formats.
But that's not how it works. The conversion between formats happens
at GTK level in GtkClipboard or, if GtkClipboard is not used, with
gtk_target_list_add_image_targets() to announce all supported image
formats, and with gtk_selection_data_set_pixbuf() to convert from
any GdkPixbuf formats to the format requested by the selection, and
with gtk_selection_data_get_pixbuf() to convert from the selection
format to GdkPixbuf, if supported.
GDK simply does not play any role in this. Therefore W32 GDK backend
should only offer formats that it can actually do conversion for
by itself (such as image/bmp <-> CF_DIB,
or text/uri-list <-> CFSTR_SHELLIDLIST).
This leverages the normal input module switching mechanism in GTK
by making it think that the gtk-im-module setting changed.
The backend returns gtk-im-module value as "ime" if W32
IME API says that an IME is in use. Otherwise it returns
and empty string - this still triggers an input module
loading code, which, not being able to load the desired module
(which is and empty string), falls back to looking at current
keyboard layout.
Paired with the code that signals gtk-im-module change on keyboard layout
switches, this is sufficient to make GTK capable of loading appropriate
input modules at runtime. At least, the kinds of modules that specify
languages for which they are loaded automatically by default, and the
IME module.
Loading other kinds of input modules might still work via specifying
the gtk-im-module setting in gtk ini file, but doing so will likely
make GTK incapable of loading the IME input module that is used
for Korean, Chinese and Japanese (and some other languages).
Until someone figures out a way to actually change gtk-im-module
setting on Windows at runtime with meaningful values, the behaviour
introduced by this commit seems like a sufficient workaround.
Commit 359df028be changed the
code to send GDK_SCROLL_SMOOTH with deltas instead of
GDK_SCROLL_(UP|DOWN|LEFT|RIGHT).
Windows defines deltas inversed for vertical direction
(positive values mean the wheel was turned forward)
but not for horizontal direction
(positive values mean the wheel was turned towards the right).
This commit fixes behavior as both axes were inverted previously.
Commit 359df028be changed the
code to send GDK_SCROLL_SMOOTH with deltas instead of
GDK_SCROLL_(UP|DOWN|LEFT|RIGHT). Change it again, to send
both the GDK_SCROLL_SMOOTH and the GDK_SCROLL_(UP|DOWN|LEFT|RIGHT)
event separately (with the discrete event marked as emulated),
as this is what other backends (such as wayland) do.
Set delta_x or delta_y for GdkScrollEvent.
HIWORD (wParam) in WM_MOUSE(H)WHEEL is the scroll delta.
A delta value of WHEEL_DELTA (which is 120) means scrolling
one full unit of something (for example, a line).
The delta should also be multiplied by the value that the
SystemParametersInfo (SPI_GETWHEELSCROLL(LINES|CHARS), 0, &value, 0)
call gives back, unless it gives back 0xffffffff, in which case
it indicates that scrolling is page- or screen-based, not line-based
(GDK doesn't support that at the moment).
Also, all deltas should be inverted, since MS sends negative deltas
when scrolling down (rotating the wheel back, in the direction of
the user).
With deltas set the mode should be set to GDK_SCROLL_SMOOTH.
Fixes issue 1263.
gdk_win32_window_set_transient_for() behaves incorrectly when
called in sequence with the same arguments. This fix ensures it
always operates correctly.
In some cases this function gets called multiple times with the
same arguments, e.g. when tooltips are shown.
See issue #1214
We also need to invalidate the OpenGL/ES window when we resize the
window via a mouse drag operation, so that we don't get glitches in such
situations, because they are not covered in GdkWindow's
impl_class->move_resize().
Make sure that we only force the invalidation when necessary (as it is
expensive), and clean up the gdkevents-win32.c code so that we include
gdkglcontext-win32.h in the right place instead of using an extern, as
we need to invalidate the window accordingly.
We need to force redraws of the whole window when we are using EGL/ANGLE
during maximize, restore and Aerosnap ops so that we do not get glitches
in the resulting window.
This is for adding a EGL-based renderer which is done via the ANGLE
project, which translate EGL calls to Direct3D 9/11. This is done as a
possible solution to issue #105, especially for cases where the needed
full GL extensions to map OpenGL to Direc3D is unavailable or
unreliable, or when the OpenGL implementation from the graphics drivers
are problematic.
To enable this, do the following:
-Build ANGLE and ensure the ANGLE libEGL.dll and libGLESv2.dll are
available. A sufficiently-recent ANGLE is needed for things to
work correctly--note that the copy of ANGLE that is included in
qtbase-5.10.1 is sufficient. ANGLE is licensed under a BSD 3-clause
license. Note also that Visual Studio 2013 or later is required to
build ANGLE from QT-5.10.1, but the 2013-built ANGLE DLLs can work
without without problems for GTK+ that is built with Visual Studio
2008 or later.
-Build libepoxy on Windows with EGL support enabled.
-Define GDK_WIN32_ENABLE_EGL when building gdk-win32.lib when building
with Visual Studio, or pass in --enable-win32-gles during configure
when building with MinGW/mingw-w64.
-Prior to running GTK+ programs, the GDK_GL envvar needs to contain
gles.
Known issues:
-Only OpenGL ES 3 is supported, ANGLE's ES 2 does not support the needed
extensions, notably GL_OES_vertex_array_object, but its ES 3 support is
sufficient.
-There is no autodetection or fallback mechanism to enable using
EGL/Angle automatically yet. There is no plans to do this in this
commit.
Thanks to LRN for pointing out that we should #include
"win32/gdkwin32.h" instead of #include "gdkwin32.h" for gdkgl.c. LRN
also did the autotools portion of this patch.
Further notes about the autotools --enable-win32-gles option, fom LRN:
This adds --enable-win32-gles option, which enables the
code for GLES renderer. This commit also adds tests for WGL and
EGL in epoxy. The absence of WGL is highly unlikely (it's enabled
by default), but checking for EGL when GLES is enabled is necessary,
as EGL is disabled in Windows builds of epoxy by default.
There is no reason why we shouldn't pass this flag every time
Z-order changes. We have separate routines that are used to
maintain relative Z-order, so it should be completely OK to
pass SWP_NOOWNERZORDER to let the OS know that it shouldn't try
to maintain relative Z-order of the windows when raising them.
Pass SWP_NOOWNERZORDER when rising TEMP surfaces to the top. This ensures that
they don't drag anything else to the top with them. The use-case for this is
a tooltip (which must be on top) appearing for a non-foreground surface,
causing said surface to rise above other surfaces, some of which may
be foreground at the moment.
https://bugzilla.gnome.org/show_bug.cgi?id=784766
Fixes issue #852
