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video: Add SDL_SetWindowMouseRect.

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This API and implementation comes from the Unreal Engine branch of SDL, which
originally called this "SDL_ConfineCursor".

Some minor cleanup and changes for consistency with the rest of SDL_video, but
there are two major changes:

1. The coordinate system has been changed so that `rect` is _window_ relative
   and not _screen_ relative, making it easier to implement without having
   global access to the display.
2. The UE version unset all rects when passing `NULL` as a parameter for
   `window`, this has been removed as it was an unused feature anyhow.

Currently this is only implemented for X, but can be supported on Wayland and
Windows at minimum too.
This commit is contained in:
Ethan Lee
2021-11-08 13:52:48 -05:00
committed by Sam Lantinga
parent 1a98dcb6aa
commit 4b42c05ba1
23 changed files with 437 additions and 3 deletions
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2
include/SDL_config.h.cmake
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@@ -413,6 +413,7 @@
#cmakedefine SDL_VIDEO_DRIVER_X11_DYNAMIC_XCURSOR @SDL_VIDEO_DRIVER_X11_DYNAMIC_XCURSOR@
#cmakedefine SDL_VIDEO_DRIVER_X11_DYNAMIC_XINERAMA @SDL_VIDEO_DRIVER_X11_DYNAMIC_XINERAMA@
#cmakedefine SDL_VIDEO_DRIVER_X11_DYNAMIC_XINPUT2 @SDL_VIDEO_DRIVER_X11_DYNAMIC_XINPUT2@
#cmakedefine SDL_VIDEO_DRIVER_X11_DYNAMIC_XFIXES @SDL_VIDEO_DRIVER_X11_DYNAMIC_XFIXES@
#cmakedefine SDL_VIDEO_DRIVER_X11_DYNAMIC_XRANDR @SDL_VIDEO_DRIVER_X11_DYNAMIC_XRANDR@
#cmakedefine SDL_VIDEO_DRIVER_X11_DYNAMIC_XSS @SDL_VIDEO_DRIVER_X11_DYNAMIC_XSS@
#cmakedefine SDL_VIDEO_DRIVER_X11_DYNAMIC_XVIDMODE @SDL_VIDEO_DRIVER_X11_DYNAMIC_XVIDMODE@
@@ -421,6 +422,7 @@
#cmakedefine SDL_VIDEO_DRIVER_X11_XINERAMA @SDL_VIDEO_DRIVER_X11_XINERAMA@
#cmakedefine SDL_VIDEO_DRIVER_X11_XINPUT2 @SDL_VIDEO_DRIVER_X11_XINPUT2@
#cmakedefine SDL_VIDEO_DRIVER_X11_XINPUT2_SUPPORTS_MULTITOUCH @SDL_VIDEO_DRIVER_X11_XINPUT2_SUPPORTS_MULTITOUCH@
#cmakedefine SDL_VIDEO_DRIVER_X11_XFIXES @SDL_VIDEO_DRIVER_X11_XFIXES@
#cmakedefine SDL_VIDEO_DRIVER_X11_XRANDR @SDL_VIDEO_DRIVER_X11_XRANDR@
#cmakedefine SDL_VIDEO_DRIVER_X11_XSCRNSAVER @SDL_VIDEO_DRIVER_X11_XSCRNSAVER@
#cmakedefine SDL_VIDEO_DRIVER_X11_XSHAPE @SDL_VIDEO_DRIVER_X11_XSHAPE@

2
include/SDL_config.h.in
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@@ -385,6 +385,7 @@
#undef SDL_VIDEO_DRIVER_X11_DYNAMIC_XCURSOR
#undef SDL_VIDEO_DRIVER_X11_DYNAMIC_XINERAMA
#undef SDL_VIDEO_DRIVER_X11_DYNAMIC_XINPUT2
#undef SDL_VIDEO_DRIVER_X11_DYNAMIC_XFIXES
#undef SDL_VIDEO_DRIVER_X11_DYNAMIC_XRANDR
#undef SDL_VIDEO_DRIVER_X11_DYNAMIC_XSS
#undef SDL_VIDEO_DRIVER_X11_DYNAMIC_XVIDMODE
@@ -393,6 +394,7 @@
#undef SDL_VIDEO_DRIVER_X11_XINERAMA
#undef SDL_VIDEO_DRIVER_X11_XINPUT2
#undef SDL_VIDEO_DRIVER_X11_XINPUT2_SUPPORTS_MULTITOUCH
#undef SDL_VIDEO_DRIVER_X11_XFIXES
#undef SDL_VIDEO_DRIVER_X11_XRANDR
#undef SDL_VIDEO_DRIVER_X11_XSCRNSAVER
#undef SDL_VIDEO_DRIVER_X11_XSHAPE

1
include/SDL_test_common.h
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@@ -73,6 +73,7 @@ typedef struct
int window_minH;
int window_maxW;
int window_maxH;
SDL_Rect confine;
int logical_w;
int logical_h;
float scale;

17
include/SDL_video.h
View File

@@ -1497,6 +1497,23 @@ extern DECLSPEC int SDLCALL SDL_SetWindowModalFor(SDL_Window * modal_window, SDL
*/
extern DECLSPEC int SDLCALL SDL_SetWindowInputFocus(SDL_Window * window);
/**
* Confines the cursor in the specified rect area of a window.
*
* Note that this does NOT grab the cursor, it only defines the area a cursor
* is restricted to when the window has mouse focus.
*
* \param window The window that will be associated with the barrier.
* \param rect A rectangle area in window-relative coordinates. If NULL the
* barrier for the specified window will be destroyed.
*
* \returns 0 on success or a negative error code on failure; call
* SDL_GetError() for more information.
*
* \sa SDL_SetWindowGrab
*/
extern DECLSPEC int SDLCALL SDL_SetWindowMouseRect(SDL_Window * window, const SDL_Rect * rect);
/**
* Set the gamma ramp for the display that owns a given window.
*