The conversion of window icon image data involves unsigned char color
values being promoted to int and then shifted to the left by 24. For
32-bit ints this is just far enough to trigger undefined behavior.
It worked by accident because of how current compilers translate this
piece of code.
This was caught by @slimsag while working on [Zig bindings for GLFW][1],
and diagnosed together with @Andoryuuta, as described [in an
article][2]. Zig has UBSan enabled by default, which caught this
undefined behavior.
[1]: https://github.com/hexops/mach-glfw
[2]: https://devlog.hexops.com/2021/perfecting-glfw-for-zig-and-finding-undefined-behavior#finding-lurking-undefined-behavior-in-6-year-old-glfw-code
Thanks to Maato, martinhath, dcousens, drfuchs and Validark for helping
to refine the solution.
This commit message was rewritten by @elmindreda to hopefully reflect
the conclusions of the pull request thread.
Related to hexops/mach#20
Closes#1986
(cherry picked from commit 9cd4d2fa20)
The _glfwPlatformSetWindowFloating function would return without freeing
the state array if the window was already in the requested state.
(cherry picked from commit 071d7c0f46)
The window decoration window can go away between calls to XQueryPointer,
for example if the GLFW_DECORATED window attribute was just cleared.
(cherry picked from commit ceb20c7f97)
Background: The IM will filter out key events, instead sending exact
duplicate events that are not filtered. It does not send these for
every event, however, so the duplicate events cannot be relied on for
key input. Instead we need to identify and discard them. Since they
are identical, they have the same timestamp as the originals.
The previous duplicate event detection would consume unrelated key
events if the keys were pressed simultaneously, as it only tracked
a single timestamp.
This fixes that issue for any combination of keys, at the expense of
a 1 KB array per GLFW window.
This fix is a stopgap until explicit IME support is done.
Based on #1472 by @LucaRood.
Fixes#1112.
Fixes#1415.
Fixes#1616.
Fixes#1663.
Closes#1472.
(cherry picked from commit 9a3664b4a9)
The non-root parent window owned by the WM could be destroyed before we
process the ConfigureNotify event using the cached parent handle.
Bug was found by unmapping a decorated window.
This like all uses of the Xlib error handler is not thread safe and
there is nothing we can do about that short of moving to XCB.
Fixes#1633.
(cherry picked from commit e65de2941c)
This should have been initialized to the screen root, not None. This
issue was introduced by fe57e3c292.
Fixes#1620.
(cherry picked from commit 9372ba95fa)
When the WM does not support EWMH or there is no WM running, GLFW falls
back to XSetInputFocus, which will emit BadMatch if the window is not
viewable, which will terminate the program.
Bug spotted on IRC.
(cherry picked from commit aa5e313561)
A window resize action that also resulting in the window being moved did
not emit any window positions events, as the position of real
ConfigureNotify events was ignored. The real events use parent
coordinates instead of root coordinates so this adds parent tracking and
conditional translation.
Fixes#1613.
(cherry picked from commit fe57e3c292)
This fixes glfwMaximizeWindow having no effect on hidden windows by
manually appending the maximization states to the EWMH state property.
(cherry picked from commit 4837b78ffe)
This fixes the enabling of window decorations after creation. Instead
of removing the _MOTIF_WM_HINTS property, we now set or unset the
MWM_DECOR_ALL bit of the decorations field.
Fixes#1566.
(cherry picked from commit 5fc4c01302)
For users with multiple keyboard layouts configured, glfwGetKeyName
works fine only with the primary layout. Switching layouts results in
changing the group index. This commit querries the current group index
when initializing keyboard input and keeps track of any change to it.
As a result the scancode -> keyname mapping may change while the program
is running (needs to be documented).
Fixes#1462.
Closes#1528.
(cherry picked from commit 36f90800d8)
Files built for Win32 must use C89 style declarations for compatibility
with VS 2010 and 2012, which are still supported by GLFW.
(cherry picked from commit 56aad76b16)
This renames 'raw input' to 'raw mouse motion' as there are other kinds
of raw input. The update path is restructured to avoid reinitializing
all of disabled cursor mode. Modification of shared state is moved out
into shared code. Raw mouse motion is disabled by default for
compatibility.
Related to #1401.
click events would have an incorrect position after changing workspace,
if the mouse didn't move in between.
(Another example where this matters is a new window, if it appears under
the cursor, clicking would lead the application to think the user clicked
at 0,0)
This adds the GLFW_SCALE_TO_MONITOR window hint for automatically
resizing the content area of a window to the requested size times the
monitor content scale each time it is placed on a new monitor. This
only applies to windowed mode windows and includes the initial placement
at window creation.
This hint only has an effect on platforms where screen coordinates and
pixels always map 1:1 such as Windows and X11. Platforms like macOS
instead change the resolution of the framebuffer independently of the
window size.
Related to #676.
Related to #1115.
