...when we are using wglChoosePixelFormatARHB(). This ensures that we
hvae a HDC with a pixel format that will really support alpha bits, as
we did for the traditional ChoosePixelFormat().
Thanks to Patrick Zacharias for testing and pointing things out.
We were sending random junk to ChoosePixelFormat().
Also assert that we don't overflow the array. That might be usefu to
know if we carelessly add attributes later.
... for creating the actual WGL contexts, so that we can cut down on the
number of times where we need to create the base, legacy WGL contexts in
order to create the WGL contexts with attributes. We could just use the
dummy context that we have to make it current to create the needed
WGL contexts.
If we are querying the best supported pixel format for our HDC via
wglChoosePixelFormatARB() (i.e. we have the WGL_ARB_pixel_format extension),
it may return a pixel format that is different from the pixel format that we
used for the dummy context that we have setup, in order to, well, run
wglChoosePixelFormatARB(), which sadly requires a WGL context (HGLRC) to be
current in order to use it, which means the dummy HDC already has a pixel
format that has been set (notice that each HDC is only allowed to have its
pixel format to be set *once*). This is notably the case on Intel display
drivers.
Since we are emulating surfaceless GL contexts, we are using the dummy GL
context (and thus dummy HDC that is derived from the notification HWND used in
GdkWin32Display) for doing that, we would get into trouble if th actual HDC
from the GdkWin32Surface has a different pixel format set.
So, as a result, in order to fix this situation, we do the following:
* Create yet another dummy HWND in order to grab the HDC to query for the
capabilities the GL drivers support, and to call wglChoosePixelFormatARB() as
appropriate (or ChoosePixelFormat()) for the final pixel format that we use.
* Ditch the dummy GL context, HDC and HWND after obtaining the pixel format.
* Then set the final pixel format that we obtained onto the HDC that is derived
from the HWND used in GdkWin32Display for notifications, which will become our
new dummy HDC.
* Create a new dummy HGLRC for use with the new dummy HDC to emulate surfaceless
GL support.
We are currently using g_clear_pointer() on the intermediate WGL contexts
(HGLRC)'s that we need to create in the way, which means that we need to ensure
that the correct calling convention for wglDeleteContext() is being applied.
To be absolutely safe about it, use the gdk_win32_private_wglDeleteContext()
calls, which will in turn call wglDeleteContext() directly from opengl32.dll
(using the OpenGL headers from the Windows SDK) instead of going via libepoxy,
which will assure us that the correct calling convention is applied.
Fixes issue #5808.
In particular, we want to get the GL version, when the Windows box/VM
has an unsuitable GL implementation.
This is somewhat helpful in analyzing failures to bring up GL on
machines where users claim GL does work.
This way, we can realize it and either print success information about
it or return NULL if that fails.
This makes it more likely that we fail early, which means we can then
initialize EGL.
This refactor achieves the following:
* check GL version against proper matching context version
In particular, for legacy contexts, we now actually check
* make sure the actual version is set, even for legacy contexts
* make sure set_is_legacy() is set properly
[30/1038] Compiling C object gdk/win32/libgdk-win32.a.p/gdkmain-win32.c.obj
../gdk/win32/gdkmain-win32.c:146:1: warning: 'gdk_win32_finalize_ole' defined but not used [-Wunused-function]
146 | gdk_win32_finalize_ole (void)
| ^~~~~~~~~~~~~~~~~~~~~~
../gdk/win32/gdkmain-win32.c:113:1: warning: 'gdk_win32_finalize_com' defined but not used [-Wunused-function]
113 | gdk_win32_finalize_com (void)
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
A number of warnings are produced:
[23/1038] Compiling C object gdk/win32/libgdk-win32.a.p/gdkinput-dmanipulation.c.obj
../gdk/win32/gdkinput-dmanipulation.c: In function 'reset_viewport':
../gdk/win32/gdkinput-dmanipulation.c:354:11: warning: variable 'hr' set but not used [-Wunused-but-set-variable]
354 | HRESULT hr;
| ^~
Try to do something sensible instead.
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
../gdk/win32/gdkclipdrop-win32.c: In function 'transmute_cf_shell_id_list_to_text_uri_list':
C:/msys64/ucrt64/include/glib-2.0/glib/gstring.h:72:5: warning: ignoring return value of 'g_string_free_and_steal' declared with attribute 'warn_unused_result' [-Wunused-result]
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
In file included from ../gdk/win32/gdkdrag-win32.c:201:
../gdk/win32/gdkprivate-win32.h:45: warning: "GDK_NOTE" redefined
45 | #define GDK_NOTE(type,action) \
|
../gdk/win32/gdkdrag-win32.c:40: note: this is the location of the previous definition
40 | #define GDK_NOTE(a,b)
Fixes: bc159207bd ("gdk: Drop old debug macros")
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
When using GDK_DEBUG=gl-egl, we end up using GL, but that is not well supported:
Creating EGL context version 3.0 (debug:no, forward:no, legacy:yes, es:no)
Created EGL context[0000000000000004]
OpenGL version: 0.0 (legacy)
* GLSL version: (NULL)
* Max texture size: -1059701680
* Extensions checked:
- GL_KHR_debug: no
- GL_EXT_unpack_subimage: yes
- OES_vertex_half_float: no
** (gtk4-demo.exe:14324): WARNING **: 19:16:41.468: Compile failure in
vertex shader:
ERROR: 0:7: 'gl_Position' : undeclared identifier
---8<---
Use GLES when EGL implementation is ANGLE.
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
We might be dealing with GL contexts from different threads, which have more
gotchas when we are using libepoxy, so in case the function pointers for
these are invalidated by wglMakeCurrent() calls outside of GTK/GDK, such as
in GstGL, we want to use these functions that are directly linked to
opengl32.dll provided by the system/ICD, by linking to opengl32.lib.
This will ensure that we will indeed call the "correct" wgl* functions that
we need.
This should help fix issue #5685.
... and use this check in gdk_gl_context_make_current() and
gdk_gl_context_get_current() to make sure the context really is still
current.
The context no longer being current can happen when external GL
implementations make their own contexts current in the same threads GDK
contexts are used in.
And that can happen for example by WebKit.
Theoretically, this should also allow external EGL code to run in X11
applications when GDK chooses to use GLX, but I didn't try it.
Fixes#5392
GTK knows when a surface is modally blocked and automatically drops
button press and release events, so do not block input in advance
from WM_MOUSEACTIVATE.
This is largely adapted from commit 83027c68f1 ("11: Implement
inhibit_system_shortcuts API"), with similar rationale:
To implement the inhibit_system_shortcuts API on X11, we emulate the
same behavior using grabs on the keyboard.
To avoid keeping active grabs on the keyboard that would affect
other X11 applications even when the surface isn't focused, the X11
implementation takes care of releasing the grabs as soon as the
toplevel loses focus.
Note that Windows has low-level keyboard hooks that could help achieve
the expected behaviour. This is implemented by spice-gtk & gtk-vnc for
example, but correctness isn't obvious. I left a TODO comment.
This patch helps implementing remote desktop widgets with GTK4, since
currently on win32 backend Alt-Tab and such are always left to the
system unless there is keyboard grab (which can't be requested by the
client API anymore, afaict).
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
