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Fixed bug 2054 - SDL_GetError: "Unknown touch device"

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The "Unknown touch device" message appears because the initial touch device setup loop uses SDL_GetTouch() as a guard for calling SDL_AddTouch().  SDL_GetTouch() will always report "Unknown touch device" since the device hasn't been added yet.  The SDL_GetTouch() call is unnecessary since SDL_AddTouch() calls SDL_GetTouchIndex() to verify that the device hasn't been added yet, and SDL_GetTouchIndex() has the benefit of not reporting an error for a device it can't find.
This commit is contained in:
Sam Lantinga 2015-05-28 12:55:01 -07:00
parent 32d6dcdb47
commit 6e67c949c1
5 changed files with 10 additions and 20 deletions
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2
src/video/cocoa/SDL_cocoawindow.m
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@ -951,11 +951,9 @@ SetWindowStyle(SDL_Window * window, unsigned int style)
for (NSTouch *touch in touches) { for (NSTouch *touch in touches) {
const SDL_TouchID touchId = (SDL_TouchID)(intptr_t)[touch device]; const SDL_TouchID touchId = (SDL_TouchID)(intptr_t)[touch device];
if (!SDL_GetTouch(touchId)) {
if (SDL_AddTouch(touchId, "") < 0) { if (SDL_AddTouch(touchId, "") < 0) {
return; return;
} }
}
const SDL_FingerID fingerId = (SDL_FingerID)(intptr_t)[touch identity]; const SDL_FingerID fingerId = (SDL_FingerID)(intptr_t)[touch identity];
float x = [touch normalizedPosition].x; float x = [touch normalizedPosition].x;

2
src/video/emscripten/SDL_emscriptenevents.c
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@ -376,11 +376,9 @@ Emscripten_HandleTouch(int eventType, const EmscriptenTouchEvent *touchEvent, vo
int i; int i;
SDL_TouchID deviceId = 0; SDL_TouchID deviceId = 0;
if (!SDL_GetTouch(deviceId)) {
if (SDL_AddTouch(deviceId, "") < 0) { if (SDL_AddTouch(deviceId, "") < 0) {
return 0; return 0;
} }
}
for (i = 0; i < touchEvent->numTouches; i++) { for (i = 0; i < touchEvent->numTouches; i++) {
SDL_FingerID id; SDL_FingerID id;

2
src/video/wayland/SDL_waylandtouch.c
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@ -89,11 +89,9 @@ touch_handle_touch(void *data,
*/ */
SDL_TouchID deviceId = 0; SDL_TouchID deviceId = 0;
if (!SDL_GetTouch(deviceId)) {
if (SDL_AddTouch(deviceId, "qt_touch_extension") < 0) { if (SDL_AddTouch(deviceId, "qt_touch_extension") < 0) {
SDL_Log("error: can't add touch %s, %d", __FILE__, __LINE__); SDL_Log("error: can't add touch %s, %d", __FILE__, __LINE__);
} }
}
switch (touchState) { switch (touchState) {
case QtWaylandTouchPointPressed: case QtWaylandTouchPointPressed:

2
src/video/windows/SDL_windowsevents.c
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@ -849,11 +849,9 @@ WIN_WindowProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
PTOUCHINPUT input = &inputs[i]; PTOUCHINPUT input = &inputs[i];
const SDL_TouchID touchId = (SDL_TouchID)((size_t)input->hSource); const SDL_TouchID touchId = (SDL_TouchID)((size_t)input->hSource);
if (!SDL_GetTouch(touchId)) {
if (SDL_AddTouch(touchId, "") < 0) { if (SDL_AddTouch(touchId, "") < 0) {
continue; continue;
} }
}
/* Get the normalized coordinates for the window */ /* Get the normalized coordinates for the window */
x = (float)(input->x - rect.left)/(rect.right - rect.left); x = (float)(input->x - rect.left)/(rect.right - rect.left);

2
src/video/x11/SDL_x11xinput2.c
View File

@ -197,11 +197,9 @@ X11_InitXinput2Multitouch(_THIS)
continue; continue;
touchId = t->sourceid; touchId = t->sourceid;
if (!SDL_GetTouch(touchId)) {
SDL_AddTouch(touchId, dev->name); SDL_AddTouch(touchId, dev->name);
} }
} }
}
X11_XIFreeDeviceInfo(info); X11_XIFreeDeviceInfo(info);
#endif #endif
} }