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Fixed bug #1056 (Frequent crashes in Touch events by simply touching the screen)
Joseba García Echebarria 2010-12-15 01:55:22 PST
I believe the crash is caused by a check not being performed on wether an
SDL_Touch element is NULL before using it in the SDL_SendTouchMotion function
in src/events/SDL_touch.c around line 400.
Judging from the rest of the code, there's a missing
if (!touch) {
return 0;
}
before using "touch" as SDL_GetFinger(), SDL_GetFingerIndexId() use
touch->num_fingers without checking.
I can attach a patch if you like. It seems pretty straightforward, though.
I have yet to discover why touch is being returned as NULL as this error is
only triggered when an actual gesture has been performed, maybe something
related to SDL_AddTouch()?
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Fri, 28 Jan 2011 10:21:58 -0800 |
| parents | a0e096916474 |
| children |
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These are test programs for the SDL library: checkkeys Watch the key events to check the keyboard graywin Display a gray gradient and center mouse on spacebar loopwave Audio test -- loop playing a WAV file testalpha Display an alpha faded icon -- paint with mouse testaudioinfo Lists audio device capabilities testbitmap Test displaying 1-bit bitmaps testblitspeed Tests performance of SDL's blitters and converters. testcdrom Sample audio CD control program testcursor Tests custom mouse cursor testdyngl Tests dynamically loading OpenGL library testerror Tests multi-threaded error handling testfile Tests RWops layer testgamma Tests video device gamma ramp testgl A very simple example of using OpenGL with SDL testgl2 An even simpler example using the SDL 1.3 API testhread Hacked up test of multi-threading testiconv Tests international string conversion testjoystick List joysticks and watch joystick events testkeys List the available keyboard keys testloadso Tests the loadable library layer testlock Hacked up test of multi-threading and locking testmultiaudio Tests using several audio devices testoverlay Tests the software/hardware overlay functionality. testoverlay2 Tests the overlay flickering/scaling during playback. testpalette Tests palette color cycling testplatform Tests types, endianness and cpu capabilities testsem Tests SDL's semaphore implementation testshape Tests shaped windows testsprite Example of fast sprite movement on the screen testsprite2 Improved version of testsprite testtimer Test the timer facilities testver Check the version and dynamic loading and endianness testvidinfo Show the pixel format of the display and perfom the benchmark testwin Display a BMP image at various depths testwm Test window manager -- title, icon, events testwm2 Improved version of testwm threadwin Test multi-threaded event handling torturethread Simple test for thread creation/destruction