MinGW-w64 CRT provides no 'hid.lib' file. Instead, it has 'libhid.a'
which can be linked with '-lhid' linker argument.
Also, we have to declare the '_LIBADD' variable and add 'LDADDS' to it,
or 'LDADDS' won't do anything for the build.
Note that gdk_monitor_get_geometry () returns DPI-scaled values,
while the screen offset should be unscaled, as scales are properties
of indivdual monitors.
An arithmetic operation involving a signed and an unsigned operand
of the same rank will have both operands converted to *unsigned*.
That's an issue if the signed operand actually has a negative value.
That was causing issues with the handling of monitor geometries that
had negative x / y positions.
...if GLES (libANGLE) support was enabled in the build. This way, we can
check whether the GL driver is capable enough to support the OpenGL
features that we use in GTK. If the driver is not capable enough, and
GLES support is enabled, we can try to create the GdkGLContext again as a
GLES context.
Group the WGL-specific code and GLES-specific code together, so that we
can reduce the number of #ifdef ... in the code, to make the code more
readable and easily maintained. This will pave the way to add a
fallback mode to use libANGLE (OpenGL/ES) in case the Desktop OpenGL
support is inadequte, if OpenGL/ES support is enabled in the build.
This is somewhat based on the updates that were done in GTK master, so
we are using one subclass for WGL-based GdkGLContexts, and another for
GLES-based GdkGLContexts.
Also remove the underscores in many of the functions in
gdkglcontext-win32.*.
Clean up the code a bit as a result.
Like the recent updates in GTK4, the HWND that we use to obtain the HDC
that we need for OpenGL/GLES operations should really be tied to
GdkWindow, not GdkDisplay, as that is where the Win32 HWND where we
originate from is located, so stop storing the GL HWND in
GdkWin32Display, but just grab them from the GdkWindow that is bound to
the GdkGLContext.
We are more conservative about freeing up GL resources in GTK3, so we
will continue to call ReleaseDC() as we did before.
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.
