It apparently worked by chance in the past, but now causes e.g.
alphanumeric characters to be interpreted as half-width katakana
when using the Japanese IME.
Some GL drivers such as Mesa-D3D12 do not allow one to call SetPixelFormat() on
a given HDC if one pixel format has been already set for it, so first check the
HDC with GetPixelFormat() to see whether a pixel format has already been set
with the HDC, and only attempt to acquire the pixel format if one has not been
set.
This will fix running with GL on Windows using the Mesa drivers.
We can just group the code for the desktop GL codepath and the EGL
codepath a bit so that we can just have a single location where we
return TRUE upon a successful setup of our WGL/EGL context, and avoid
the C4715 warning that is considered an error when building with
GLib-2.68.x or later using Visual Studio, when we are building without
EGL support.
Partially fixes issue #2191 regarding switching to another app while
hovering a stylus over a drawing tablet causes subsequent mouse
clicks in the app to be ignored. I was not able to reproduce the
other behavior described in #2191 concerning tiling a window.
Intel OpenGL drivers have an issue where the results of a series of
glBlitFramebuffer() can delay updating the display, when we use GDK_GL=always,
which is manifested when attempting to enter text in text boxes.
This attempts to work around this issue by requiring a glFlush() call and a
retry to the same glBlitFramebuffer() calls to avoid delays in keystrokes when
using GDK_GL=always and when not using libANGLE OpenGL/ES emulation, when an
Intel OpenGL driver is being used.
Special thanks to Lukas K. for the analysis and coming up with a workaround,
which this patch builds upon.
Fixes issue 3487
In gdkdevice-win32.c we are interested in knowing which window
receives mouse input at a specific location.
Only WindowFromPoint is the right API for the task, other API's
(such as (Real)ChildWindowFromPoint(Ex)) have shortcomings because
they are really designed for other purposes. For example, only
WindowFromPoint is able to look through transparent layered windows.
So even if we want to find a direct child we have to use
WindowFromPoint and then walk up the hierarchy.
Fixes: #370, #417
See: !2767
Previously, a GDK application handled the Wintab cursors (stylus,
eraser, etc.) only during app initialization. If new cursors were
recognized by Wintab during app execution, the app would not know
about them.
This fix still handles Wintab cursors known during app initialization.
In addition, when Wintab recognizes new cursors and notifies the app
via a WT_CSRCHANGE message, the app handles the new cursors, creating
new Wintab device objects for them.
Closes#1549
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.
