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cf31ea1478
Volumetric In X11 the SDL error "Unknown touch device" can occur after which the application stops recognizing touch events. For a kiosk-type application this results in a hang as far as the user is concerned. This is reproducible on HP Z220/Z230/Z240 workstations by swapping USB cables for a while and it also occurs with no physical changes, probably due to USB device power management. A workaround is to make SDL re-enumerate the touch devices like it does at startup. A patch is attached.
55 lines
1.4 KiB
C
55 lines
1.4 KiB
C
/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2017 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#include "../../SDL_internal.h"
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#if SDL_VIDEO_DRIVER_X11
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#include "SDL_x11video.h"
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#include "SDL_x11touch.h"
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#include "SDL_x11xinput2.h"
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#include "../../events/SDL_touch_c.h"
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void
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X11_InitTouch(_THIS)
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{
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if (X11_Xinput2IsMultitouchSupported()) {
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X11_InitXinput2Multitouch(_this);
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}
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}
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void
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X11_QuitTouch(_THIS)
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{
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SDL_TouchQuit();
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}
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void
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X11_ResetTouch(_THIS)
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{
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X11_QuitTouch(_this);
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X11_InitTouch(_this);
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}
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#endif /* SDL_VIDEO_DRIVER_X11 */
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/* vi: set ts=4 sw=4 expandtab: */
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