src/video/windows


Log

Author Commit Date CI Message
Ozkan Sezer d1e4367f 2022-03-15T21:41:02 SDL_windowskeyboard.c: fix build with SDL_DISABLE_WINDOWS_IME defined. Fixes https://github.com/libsdl-org/SDL/issues/5408
Zach Reedy 363c3678 2022-03-10T17:12:33 Fixed: Incorrect assumption that mouse button is released when window is allocated
Ozkan Sezer 072db7b0 2022-03-12T01:56:40 SDL_windowskeyboard.c (IME_IsTextInputShown): remove unused local vars.
Zach Reedy d14a1263 2022-03-11T17:45:17 IME Composition Truncation + SDL_IsTextInputShown + SDL_ClearComposition (#5398) * Fixes for IME Composition Truncation + Addition of SDL_ClearComposition, SDL_IsTextInputShown * Fixed: Documentation and code style issues raised during code review.
Jo Bates 01d38e7a 2022-03-09T14:03:52 Make Win32 fullscreen and borderless windows minimizable
pionere 97269e14 2022-01-18T17:51:17 adjustments to ime_candidates - allocate ime_candidates on demand - allow write to the whole allocated memory of ime_candidates - ensure ime_candcount is set to zero in case the candidates can not be queried for any reason
pionere 6f404d0f 2022-01-18T17:49:33 cleanup IME_GetCandidateList / UILess_GetCandidateList - move IME_ShowCandidateList, ImmGetContext and ImmReleaseContext to this function - set ime_candpgsize to MAX_CANDLIST if dwPageSize is zero - comment out deselection of ime_candsel in case of korean language for the moment (LANG_CHT does not work anyway)
pionere 32c7d5d3 2022-01-18T17:44:51 cleanup IME_UpdateInputLocale - do not store the HKL in a static variable - always set the ime_candvertical value in case the HKL is changed
pionere 25aa7244 2022-01-18T17:43:31 cleanup IME_GetId - use assert instead of a check (it is a static function with constant parameter) - assume it is called with 0 first (simplifies the logic) - reuse dwLang value instead of a new 'call' to LANG()
pionere 3c85cef4 2022-01-17T09:58:16 cleanup SDL_RegisterApp - fix memory leak when RegisterClassEx fails - set style according to the documentation - eliminate duplicated SDL_Instance setter
pionere 014e2bbd 2022-01-12T16:40:52 use SDL_COMPILE_TIME_ASSERT instead of SDL_STATIC_ASSERT
pionere 942b01a5 2022-01-09T15:08:21 do not use RWOps in WIN_SetWindowIcon
ulatekh 57bc9040 2022-01-07T08:54:08 Add hint to optionally forcibly raise the window under MS Windows.
ulatekh d7873e65 2022-01-04T15:47:29 Disable tablet flicks under MS Windows.
ulatekh 53df0e66 2022-01-21T17:15:18 Fix the erroneous generation of mouse-down events from touch-move events. The issue is that MS Windows synthesizes a mouse-move event in response to touch-move events, and those mouse-move events are NOT labeled as coming from a touch (e.g. GetMouseMessageSource() will not return SDL_MOUSE_EVENT_SOURCE_TOUCH for those synthesized mouse-move events). In addition, there seems to be no way to prevent this from happening; https://gist.github.com/vbfox/1339671 claims to demonstrate a technique to prevent it, but in my experience, it doesn't work. Because of this, the "fallthrough" case can't test that the synthesized mouse-move came from a touch-move, and starts erroneously pressing down the mouse-button, leading to massive confusion in the client application.
Sam Lantinga 1085c317 2022-01-07T16:43:53 Use the requested cursor size instead of the default cursor size CopyImage() will scale based on the system accessibility settings automatically. Fixes https://github.com/libsdl-org/SDL/issues/5198
Sam Lantinga 957c48b4 2022-01-07T10:58:04 Fixed detecting focus change to child dialogs Fixes https://github.com/libsdl-org/SDL/issues/5157
Sam Lantinga 120c76c8 2022-01-03T09:40:00 Updated copyright for 2022
Sam Lantinga 8f816998 2021-12-31T08:46:54 Only clear IME display options if SDL_HINT_IME_SHOW_UI is off (thanks opxdo!) Fixes https://github.com/libsdl-org/SDL/issues/5153
Sam Lantinga ca18bf11 2021-12-16T12:01:18 Don't compare raw mouse button state with windows message button state When mouse buttons are swapped, right mouse button down is the same value as raw mouse button up, and conceptually the two systems use different button masks, so never cache state between the two. Fixes https://github.com/libsdl-org/SDL/issues/5108
Hanseul Jun e7f84c20 2021-12-09T10:40:53 Fix a typo in comment.
Cameron Gutman 715d4812 2021-11-29T22:43:25 windows: Fix GUI key state when grabbing the keyboard When our keyboard grab hook is installed, GetKeyState() will return 0 for the GUI keys even when they are pressed. This leads to spurious key up events when holding down the GUI keys and the inability to use any key combos involving those modifier keys.
Sam Lantinga 942973dd 2021-11-28T09:27:28 Use mouse ID 0 for raw mouse events We don't track state for each mouse individually, so we should just use the global mouse ID for all events. Fixes https://github.com/libsdl-org/SDL/issues/5026
Ozkan Sezer 8a6e48d4 2021-11-14T04:40:50 constified SDL_RegisterApp()
Misa 3bf7994f 2021-09-27T14:38:12 Add and use `SDL_FALLTHROUGH` for fallthroughs Case fallthrough warnings can be suppressed using the __fallthrough__ compiler attribute. Unfortunately, not all compilers have this attribute, or even have __has_attribute to check if they have the __fallthrough__ attribute. [[fallthrough]] is also available in C++17 and the next C2x, but not everyone uses C++17 or C2x. So define the SDL_FALLTHROUGH macro to deal with those problems - if we are using C++17 or C2x, it expands to [[fallthrough]]; else if the compiler has __has_attribute and has the __fallthrough__ attribute, then it expands to __attribute__((__fallthrough__)); else it expands to an empty statement, with a /* fallthrough */ comment (it's a do {} while (0) statement, because users of this macro need to use a semicolon, because [[fallthrough]] and __attribute__((__fallthrough__)) require a semicolon). Clang before Clang 10 and GCC before GCC 7 have problems with using __attribute__ as a sole statement and warn about a "declaration not declaring anything", so fall back to using the /* fallthrough */ comment if we are using those older compiler versions. Applications using SDL are also free to use this macro (because it is defined in begin_code.h). All existing /* fallthrough */ comments have been replaced with this macro. Some of them were unnecessary because they were the last case in a switch; using SDL_FALLTHROUGH in those cases would result in a compile error on compilers that support __fallthrough__, for having a __attribute__((__fallthrough__)) statement that didn't immediately precede a case label.
Sam Lantinga abc12a83 2021-11-11T15:58:44 Revert "Add and use `SDL_FALLTHROUGH` for fallthroughs" This reverts commit 66a08aa3914a98667f212e79b4f0b9453203d656. This causes problems with older compilers: https://github.com/libsdl-org/SDL/pull/4791#issuecomment-966630997
Misa 66a08aa3 2021-09-27T14:38:12 Add and use `SDL_FALLTHROUGH` for fallthroughs Case fallthrough warnings can be suppressed using the __fallthrough__ compiler attribute. Unfortunately, not all compilers have this attribute, or even have __has_attribute to check if they have the __fallthrough__ attribute. [[fallthrough]] is also available in C++17 and the next C2x, but not everyone uses C++17 or C2x. So define the SDL_FALLTHROUGH macro to deal with those problems - if we are using C++17 or C2x, it expands to [[fallthrough]]; else if the compiler has __has_attribute and has the __fallthrough__ attribute, then it expands to __attribute__((__fallthrough__)); else it expands to an empty statement, with a /* fallthrough */ comment (it's a do {} while (0) statement, because users of this macro need to use a semicolon, because [[fallthrough]] and __attribute__((__fallthrough__)) require a semicolon). Applications using SDL are also free to use this macro (because it is defined in begin_code.h). All existing /* fallthrough */ comments have been replaced with this macro. Some of them were unnecessary because they were the last case in a switch; using SDL_FALLTHROUGH in those cases would result in a compile error on compilers that support __fallthrough__, for having a __attribute__((__fallthrough__)) statement that didn't immediately precede a case label.
Sam Lantinga fed85778 2021-11-10T08:47:39 Update the orientation and display modes when the display settings change on Windows Fixes https://github.com/libsdl-org/SDL/issues/1061
Sam Lantinga c0f1109b 2021-11-10T06:03:01 Implemented querying the orientation of displays on Windows
Susko3 1fc25bd8 2021-11-08T22:04:34 Properly position the IME window(s) on windows
Yufei Huang 881f747d 2021-11-09T13:35:18 Always destroy icon
Yufei Huang 7fea557b 2021-11-09T12:03:09 SDL_windowsmouse.c: Remove LR_COPYDELETEORG flag
Sam Lantinga 67c42cb4 2021-11-08T22:16:01 Fixed Windows build
Sam Lantinga fd79607e 2021-11-08T21:34:48 Added SDL_GetWindowMouseRect() Also guarantee that we won't get mouse movement outside the confining area, even if the OS implementation allows it (e.g. macOS)
Sam Lantinga 4db546b0 2021-11-08T20:35:12 Implemented SDL_SetWindowMouseRect() on macOS
Sam Lantinga 2d23d66a 2021-11-08T16:33:50 Fixed SetWindowMouseRect return value on Windows
Sam Lantinga 7d21322d 2021-11-08T16:29:19 Implemented SDL_SetWindowMouseRect() on Windows
Yufei Huang 301819cd 2021-11-08T20:34:20 SDL_windowsmouse.c: Fix WIN_CreateCursor does not scale with system cursor size preference
Sam Lantinga 2248a549 2021-11-05T22:48:46 Update the focus in case we changed focus to a child window and then away from the application In this case we'll get WM_KILLFOCUS when the child window is focused, but we'll retain focus on the top level window, but when we Alt-Tab away, we won't get another WM_KILLFOCUS or WM_NCACTIVATE, we get WM_ACTIVATE instead, so we need to check for focus updates in response to that as well.
Cacodemon345 19dee1cd 2021-10-22T06:37:20 Add SDL_GetWindowICCProfile(). (#4314) * Add SDL_GetWindowICCProfile * Add new SDL display events * Implement ICC profile change event for macOS * Implement ICC profile notification for Windows * Fix SDL_GetWindowICCProfile() for X11 * Fix compile errors
Sam Lantinga bfd2f899 2021-10-19T17:29:23 Fixed grab handling when focus changes between windows in the same application
Sam Lantinga 7fb43643 2021-10-17T13:56:31 Don't process WM_INPUT when handling relative mode by warping the mouse cursor
DomGries 06824b18 2021-10-17T19:50:39 Cleanup windows events after recent changes Improves clarity without any functional changes
Sam Lantinga a70a94e0 2021-10-15T18:11:19 Don't send a mouse leave event if the mouse is outside the window when gaining focus and in relative mode.
Ozkan Sezer c583055a 2021-10-15T10:11:24 SDL_windowsevents.c (WIN_WindowProc): remove SAFE_AREA_X and SAFE_AREA_Y Not used since commit https://github.com/libsdl-org/SDL/commit/a1fabca162091b50d6f7dd71879d028319e09d80
Sam Lantinga a1fabca1 2021-10-14T16:52:21 Removed mouse warping for local mice and improved warp handling for mouse over RDP
Sam Lantinga 5e89b3c8 2021-10-14T11:46:07 Don't need to use raw input to track the mouse during mouse capture (thanks Brick!)
Brick 0b6a8211 2021-10-12T14:08:20 Messages posted on the same tick are not new
Rémy Tassoux 0789610c 2021-10-14T00:52:05 Add SDL_HINT_WINDOW_NO_ACTIVATION_WHEN_SHOWN
Ozkan Sezer 6149e601 2021-10-13T00:03:56 remove IsWin10FCUorNewer() -- not used since commit 40ed9f75c9e1ed
Ozkan Sezer 311671a0 2021-10-12T23:50:02 fixed build after commit 6e356e20ad
Rémy Tassoux 6e356e20 2021-10-12T18:35:52 Fix mouse focus being set to null when a captured mouse cursor leaves the window.
Sam Lantinga 40ed9f75 2021-10-08T10:05:27 Workaround for Windows occasionally ignoring SetCursorPos() calls Also, since we're flushing mouse motion before and including the warp, we don't need the isWin10FCUorNewer hack to simulate mouse warp motion. Fixes https://github.com/libsdl-org/SDL/issues/4339 and https://github.com/libsdl-org/SDL/issues/4165
Sam Lantinga 16aeb8d0 2021-10-07T15:04:06 Guarantee that we don't dispatch any mouse motion from before or including the last mouse warp
Sam Lantinga 649466f4 2021-10-07T13:28:44 Flush any pending mouse motion when warping the mouse cursor Fixes https://github.com/libsdl-org/SDL/issues/4165
Sam Lantinga dd95c9c8 2021-10-06T09:09:39 Moved focus click check into WIN_UpdateFocus() so we have the correct state when setting keyboard focus Fixes https://github.com/libsdl-org/SDL/issues/4817
DomGries 0d541e5a 2021-10-06T00:36:27 Revert "Fixed relative mode mouse events stopping if you click on the title bar" This has been better fixed by b28ed02 or another related relative mouse mode change of @slouken in SDL 2.0.17 and as such can be reverted to reduce unneeded processing in WM_MOUSEMOVE
Sam Lantinga c542de92 2021-10-05T14:08:36 React to WM_NCACTIVATE instead of WM_SETFOCUS or WM_ACTIVATE for focus changes See https://github.com/libsdl-org/SDL/pull/4293 and https://github.com/libsdl-org/SDL/issues/4450 for details
Sam Lantinga 632aca29 2021-10-01T16:17:38 Window input focus is based on WM_SETFOCUS and WM_KILLFOCUS as WM_ACTIVATE doesn't necessarily imply focus. Hopefully resolves https://github.com/libsdl-org/SDL/issues/4450 and https://github.com/libsdl-org/SDL/pull/4293
Sam Lantinga 477fcf52 2021-09-24T10:49:46 Fixed whitespace
Sam Lantinga db68af80 2021-09-24T10:49:44 Reduce the likelyhood that the mouse will hover over the taskbar or toast notification while in relative mode, which causes a mouse leave event. This will still happen occasionally as the mouse is whipped around, if there is a window overlapping the game window, but it should happen less often now. This could even happen with the original code that warped the mouse every frame, so this should be a good compromise where we don't warp the mouse continously and we still keep the mouse in the safe area of the game window. Note that notifications can be any size, so the safe area may need to be adjusted or even dynamically defined via a hint.
Sam Lantinga 287571fb 2021-09-22T17:40:57 Limit effect of in_title_click and focus_click_pending to only blocking cursor warping; without this all relative mouse motion was getting ignored when a window was activated via a mouse button
Sam Lantinga 5d455cab 2021-09-21T18:15:11 Don't process raw input when the window is being dragged or clicked on.
Sam Lantinga 0fd54f91 2021-09-21T18:15:11 Fixed using a tablet with raw input relative motion Tested with a Wacom Cintiq Pro 16"
Sam Lantinga 8fee82d1 2021-09-21T18:15:09 Improve relative motion handling over RDP CR and research: @danielj
Zach Reedy 2a8938f2 2021-09-15T12:40:22 Fixed: Whitespace being striped from the end of IME strings incorrectly + Regression with SDL_SetTextInputRect (#4752) * Fixed: Whitespace being striped from the end of IME strings incorrectly * Fixed: Google IME Candidate Window not placing correctly * Why are PostBuild events stored in the vcxproj and not a user file? * Revert SDL.vcxproj properly... * Remove whitespace as per code review * Fix Werror=declaration-after-statement error in code
Zach Reedy 6f972052 2021-08-30T12:21:05 Added: Support for showing the IME Candidate Window on Windows
Ozkan Sezer ccb06296 2021-08-19T03:15:02 SDL_windowsevents.c: fix build against older SDKs.
Sam Lantinga 91a55a02 2021-08-13T23:59:39 Relative mouse motion is delivered to the window with keyboard focus This was the original intent (note SDL_UpdateWindowGrab() in SDL_OnWindowFocusGained() and SDL_OnWindowFocusLost()) and fixes a bug where relative motion unexpectedly stops if the task bar is covering the bottom of the game window and the mouse happens to move over it while relative mode is enabled. Another alternative would be to confine the mouse when relative mode is enabled, but that generates mouse motion which would need to be ignored, and it's possible for the user moving the mouse to combine with the mouse moving into the confined area so you can't easily tell whether to ignore the mouse motion. See https://github.com/libsdl-org/SDL/issues/4165 for a case where this is problematic.
Sam Lantinga 4d9efcb5 2021-08-13T11:52:25 Fixed flag test for boolean correctness
Sam Lantinga b28ed028 2021-08-13T11:39:41 Don't warp the mouse for relative mode when the window doesn't have focus
Sam Lantinga cb1e20b0 2021-08-10T17:50:17 Added KMOD_SCROLL to track the scroll lock state Fixes https://github.com/libsdl-org/SDL/issues/4566
hgs3 cb0fd05e 2021-08-07T22:41:54 Adding a clarifying comment in case a programmer unfamiliar with UTF-16 and UTF-32's relationship chances upon the code.
Henry G. Stratmann III 34701129 2021-08-07T20:51:49 Optimizing the implementation.
Henry G. Stratmann III 712e0d1f 2021-08-07T16:23:15 Fixing WM_CHAR event handling for Unicode characters outside the Basic Multilingual Plane.
Ryan C. Gordon cc4ab101 2021-07-28T14:37:33 windows: convert "//" comment to "/**/", add a FIXME. Reference #4129 Reference #4177
Sam Lantinga 41e1a236 2021-07-27T16:50:06 Correct the maximized size and position for borderless resizable windows This fixes bug https://github.com/libsdl-org/SDL/issues/4043
Sam Lantinga 3b85e3fd 2021-07-24T15:47:11 Fixed internal Windows key state when using Windows+Space or Windows+G shortcuts This fixes bugs: https://github.com/libsdl-org/SDL/issues/4369 https://github.com/libsdl-org/SDL/issues/4500
Sam Lantinga f1633127 2021-07-24T13:41:55 Added a window flash operation to be explicit about window flash behavior
Sam Lantinga e1c3a250 2021-07-24T12:11:27 Changed SDL_FlashWindow() so it doesn't take a flash count, and added the hint SDL_HINT_WINDOW_FLASH_COUNT to control behavior on Windows
Brick 7fe6dbaf 2021-07-11T15:25:24 Reset rawInputEnableCount when RawInput is not supported
Hanseul Jun 557d0f82 2021-03-11T13:36:56 Commenting a false alarm in WIN_GLES_SetupWindow. When hint SDL_HINT_OPENGL_ES_DRIVER is set to "1" (e.g. for ANGLE support), assertion due to !_this->gl_config.driver_loaded can be causes while EGL is available.
Dean Herbert 4359a47b 2021-04-02T12:48:16 Simplify ClipCursor behaviour when RelativeMouseMode is enabled The implementation of clip logic for relative mode seemed to unnecessarily limit the usable area to the middle of the window, in a 2x2 pixel region. This has the adverse side effect of moving the operating system cursor to that location, even if it is in a valid location in the window. While in most scenarios this is handled correctly (by storing the original position of the cursor in the window and restoring when leaving relative mode), there are edge cases where this clip operation can cause WM_MOUSEMOVE to fire at a point in time where it counts as a relative delta from SDL's perspective.
Dean Herbert 3720e254 2021-04-02T12:48:02 Trim some stray whitespace
scribam c2e8a791 2021-06-12T16:20:47 SDL_windowsevents: add support for multiple mice
Cameron Gutman 85b51e6c 2021-06-05T11:46:47 Fall back to polling normally if not operating the win32 message loop In this condition, we cannot safely wait/wake on events.
Jupeyy 64724db0 2021-06-04T19:55:30 Implement bare minimum for SDL_FlashWindow
Francesco Abbate 0dd7024d 2021-03-12T21:58:20 Modifies WaitEvent and WaitEventTimeout to actually wait instead of polling When possible use native os functions to make a blocking call waiting for an incoming event. Previous behavior was to continuously poll the event queue with a small delay between each poll. The blocking call uses a new optional video driver event, WaitEventTimeout, if available. It is called only if an window already shown is available. If present the window is designated using the variable wakeup_window to receive a wakeup event if needed. The WaitEventTimeout function accept a timeout parameter. If positive the call will wait for an event or return if the timeout expired without any event. If the timeout is zero it will implement a polling behavior. If the timeout is negative the function will block indefinetely waiting for an event. To let the main thread sees events sent form a different thread a "wake-up" signal is sent to the main thread if the main thread is in a blocking state. The wake-up event is sent to the designated wakeup_window if present. The wake-up event is sent only if the PushEvent call is coming from a different thread. Before sending the wake-up event the ID of the thread making the blocking call is saved using the variable blocking_thread_id and it is compared to the current thread's id to decide if the wake-up event should be sent. Two new optional video device methods are introduced: WaitEventTimeout SendWakeupEvent in addition the mutex wakeup_lock which is defined and initialized but only for the drivers supporting the methods above. If the methods are not present the system behaves as previously performing a periodic polling of the events queue. The blocking call is disabled if a joystick or sensor is detected and falls back to previous behavior.
Sam Lantinga 157c3f80 2021-05-21T09:45:08 [SDL] Minimize number of system calls when handling WM_INPUT raw input messages. Details: Currently doing 4 system calls per WM_INPUT message, which can cause the thread handling the message loop to be swapped out several times: * GetProp - to get window data from the window handle * GetRawInputData - to retrieve the raw input data * 2 calls to GetMessageExtraInfo - to ignore synthetic mouse events generated for touchscreens In this change: * Replaced GetProp by iterating the list of windows maintained by SDL (with a fallback to GetProp). Note that this will affect all messages and not just WM_INPUT * only calling GetMessageExtraInfo if a touchscreen has been detected Fix for https://jira.valve.org/browse/CSGO-4855 @saml
Ozkan Sezer 227021b6 2021-04-30T11:25:20 SDL_windowsmessagebox.c (MessageBoxDialogProc): fix calling convention.
Joseph Lyncheski a0a5da5d 2021-04-19T07:13:38 Add SDL_SetWindowAlwaysOnTop()
Dean Herbert 89b62093 2021-04-01T14:17:53 Fix race condition that can lead to ENTER/LEAVE window events never firing On windows, when toggling the state of RelativeMode rapidly, there is a high chance that SDL_WINDOWEVENT_ENTER / SDL_WINDOWEVENT_LEAVE events will stop firing indefinitely. This aims to resolve that shortcoming by ensuring mouse focus state is correctly updated via WM_MOUSELEAVE events arriving via the windows event hook.
Nicholas "LB" Braden 3dbc4cf2 2021-03-30T17:49:51 Fix compilation error for Windows SDK 8.1+ https://docs.microsoft.com/en-us/windows/win32/api/shellscalingapi/ne-shellscalingapi-monitor_dpi_type
Cameron Gutman a78bce9e 2021-01-28T20:02:01 Properly handle keys already down when the hook is installed For keys that are already down when we install the keyboard hook, we need to allow the WM_KEYUP/WM_SYSKEYUP message to be processed normally. This ensures that other applications see the key up, which prevents the key from being stuck down from the perspective of other apps when our grab is released.
Cameron Gutman 6b057c67 2021-01-26T19:16:17 Expose separate keyboard and mouse grab support This adds SDL_SetWindowKeyboardGrab(), SDL_GetWindowKeyboardGrab(), SDL_SetWindowMouseGrab(), SDL_GetWindowMouseGrab(), and new SDL_WINDOW_KEYBOARD_GRABBED flag. It also updates the test harness to exercise this functionality and makes a minor fix to X11 that I missed in https://hg.libsdl.org/SDL/rev/02a2d609369b To fit in with this new support, SDL_WINDOW_INPUT_CAPTURE has been renamed to SDL_WINDOW_MOUSE_CAPTURE with the old name remaining as an alias for backwards compatibility with older code.
Cameron Gutman a0d3c6c6 2021-01-25T21:42:14 Rename SetWindowGrab() to SetWindowMouseGrab()
Cameron Gutman 2793c9cf 2021-01-25T18:40:26 Fix grabbing Alt+Tab and Alt+Esc on Windows 7
Cameron Gutman e1f73e64 2021-01-23T16:22:44 Refactor keyboard grab to be managed by the video core This gives us flexibility to add others hints to control keyboard grab behavior without having to touch all of the backends. It also allows us to possibly expose keyboard grab separately from mouse grab for applications that want to manage those independently.
Brandon DeRosier 141f4416 2021-01-24T03:55:04 fix build failure due to -Werror=declaration-after-statement (bug #5500)
Cameron Gutman 8c921d82 2021-01-22T19:40:26 Implement keyboard grab support for Windows This is implemented via a low-level keyboard hook. Unfortunately, this is rather invasive, but it's how Microsoft recommends that it be done [0]. We want to do as little as possible in the hook, so we only intercept a few crucial modifier keys there, while leaving other keys to the normal event processing flow. We will only install this hook if SDL_HINT_GRAB_KEYBOARD=1, which is not the default. This will reduce any compatibility concerns to just the SDL applications that explicitly ask for this behavior. We also remove the hook when the grab is terminated to ensure that we're not unnecessarily staying involved in key event processing when it's not required anymore. [0]: https://docs.microsoft.com/en-us/windows/win32/dxtecharts/disabling-shortcut-keys-in-games