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Add SDL_TouchDeviceType enum and SDL_GetTouchDeviceType(SDL_TouchID id).

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Touch device types include SDL_TOUCH_DEVICE_DIRECT (a touch screen with window-relative coordinates for touches), SDL_TOUCH_DEVICE_INDIRECT_ABSOLUTE (a trackpad-style device with absolute device coordinates), and SDL_TOUCH_DEVICE_INDIRECT_RELATIVE (a trackpad-style device with screen cursor-relative coordinates).

Phone screens are an example of a direct device type. Mac trackpads are the indirect-absolute touch device type. The Apple TV remote is an indirect-relative touch device type.
This commit is contained in:
Alex Szpakowski 2018-11-10 16:15:48 -04:00
parent 2196e5765c
commit 5029d50ea8
15 changed files with 109 additions and 15 deletions
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1
src/core/linux/SDL_evdev.c
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@ -475,6 +475,7 @@ SDL_EVDEV_init_touchscreen(SDL_evdevlist_item* item)
}
ret = SDL_AddTouch(item->fd, /* I guess our fd is unique enough */
SDL_TOUCH_DEVICE_DIRECT,
item->touchscreen_data->name);
if (ret < 0) {
SDL_free(item->touchscreen_data->slots);