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Adds command line parameter -mousewarp to control the use of warping in place of grabbing. Works around bugs in certain versions of X.

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This commit is contained in:
ilag11111 2014-04-09 14:40:54 -07:00
parent 025523f3e3
commit c206d55568
1 changed files with 20 additions and 33 deletions
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53
src/sdl2/i_video.c
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@ -132,6 +132,7 @@ static Uint16 realheight = BASEVIDHEIGHT;
static const Uint32 surfaceFlagsW = 0/*|SDL_RESIZABLE*/;
static const Uint32 surfaceFlagsF = 0;
static SDL_bool mousegrabok = SDL_TRUE;
static SDL_bool mousewarp = SDL_FALSE;
#define HalfWarpMouse(x,y) SDL_WarpMouseInWindow(window, (Uint16)(x/2),(Uint16)(y/2))
static SDL_bool videoblitok = SDL_FALSE;
static SDL_bool exposevideo = SDL_FALSE;
@ -832,30 +833,7 @@ static void Impl_HandleMouseMotionEvent(SDL_MouseMotionEvent evt)
return;
}
// If LINUX64 is defined, LINUX isn't defined. This code or another
// fix needs to be put in a more proper spot.
#ifdef LINUX64
#ifndef LINUX
#define LINUX 1
#endif
#endif
#ifndef LINUX
// On most systems, grab the mouse and use relative input.
event.data2 = +evt.xrel;
event.data3 = -evt.yrel;
event.type = ev_mouse;
D_PostEvent(&event);
SDL_SetWindowGrab(window, mousegrabok);
SDL_SetRelativeMouseMode(SDL_TRUE);
#else
// On Linux, SDL_SetWindowGrab is bugged and will also grab keyboard
// input, which breaks alt-tabbing. Instead, we're warping the
// mouse as a workaround.
// If the event is from warping the pointer back to middle
// of the screen then ignore it.
if (((evt.x == wwidth/2) && (evt.y == wheight/2)))
if (mousewarp && (evt.x == wwidth/2) && (evt.y == wheight/2))
{
return;
}
@ -864,18 +842,24 @@ static void Impl_HandleMouseMotionEvent(SDL_MouseMotionEvent evt)
event.data2 = +evt.xrel;
event.data3 = -evt.yrel;
}
event.type = ev_mouse;
D_PostEvent(&event);
// Warp the pointer back to the middle of the window
// or we cannot move any further if it's at a border.
if ((evt.x < (wwidth/2 )-(wwidth/4 )) ||
(evt.y < (wheight/2)-(wheight/4)) ||
(evt.x > (wwidth/2 )+(wwidth/4 )) ||
(evt.y > (wheight/2)+(wheight/4) ) )
{
HalfWarpMouse(wwidth, wheight);
if (mousewarp){
// Warp the pointer back to the middle of the window
// or we cannot move any further if it's at a border.
if ((evt.x < (wwidth/2 )-(wwidth/4 )) ||
(evt.y < (wheight/2)-(wheight/4)) ||
(evt.x > (wwidth/2 )+(wwidth/4 )) ||
(evt.y > (wheight/2)+(wheight/4) ) )
{
HalfWarpMouse(wwidth, wheight);
}
} else {
SDL_SetWindowGrab(window, mousegrabok);
SDL_SetRelativeMouseMode(SDL_TRUE);
}
#endif
}
@ -2110,6 +2094,9 @@ void I_StartupGraphics(void)
}
if (M_CheckParm("-nomousegrab"))
mousegrabok = SDL_FALSE;
else if (M_CheckParm("-mousewarp")){
mousewarp = SDL_TRUE;
}
#if 0 // defined (_DEBUG)
else
{