2020-11-11 19:14:34 -08:00
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/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
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Copyright (C) 2020 Collabora Ltd.
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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_evdev_capabilities.h"
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2020-11-11 19:14:52 -08:00
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#if HAVE_LIBUDEV_H || defined(SDL_JOYSTICK_LINUX)
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2020-11-11 19:14:34 -08:00
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extern int
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SDL_EVDEV_GuessDeviceClass(unsigned long bitmask_ev[NBITS(EV_MAX)],
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unsigned long bitmask_abs[NBITS(ABS_MAX)],
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unsigned long bitmask_key[NBITS(KEY_MAX)],
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unsigned long bitmask_rel[NBITS(REL_MAX)])
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{
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int devclass = 0;
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unsigned long keyboard_mask;
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if (test_bit(EV_ABS, bitmask_ev) &&
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test_bit(ABS_X, bitmask_abs) && test_bit(ABS_Y, bitmask_abs)) {
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if (test_bit(BTN_STYLUS, bitmask_key) || test_bit(BTN_TOOL_PEN, bitmask_key)) {
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; /* ID_INPUT_TABLET */
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} else if (test_bit(BTN_TOOL_FINGER, bitmask_key) && !test_bit(BTN_TOOL_PEN, bitmask_key)) {
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; /* ID_INPUT_TOUCHPAD */
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} else if (test_bit(BTN_MOUSE, bitmask_key)) {
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devclass |= SDL_UDEV_DEVICE_MOUSE; /* ID_INPUT_MOUSE */
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} else if (test_bit(BTN_TOUCH, bitmask_key)) {
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/* TODO: better determining between touchscreen and multitouch touchpad,
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see https://github.com/systemd/systemd/blob/master/src/udev/udev-builtin-input_id.c */
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devclass |= SDL_UDEV_DEVICE_TOUCHSCREEN; /* ID_INPUT_TOUCHSCREEN */
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}
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if (test_bit(BTN_TRIGGER, bitmask_key) ||
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test_bit(BTN_A, bitmask_key) ||
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test_bit(BTN_1, bitmask_key) ||
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test_bit(ABS_RX, bitmask_abs) ||
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test_bit(ABS_RY, bitmask_abs) ||
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test_bit(ABS_RZ, bitmask_abs) ||
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test_bit(ABS_THROTTLE, bitmask_abs) ||
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test_bit(ABS_RUDDER, bitmask_abs) ||
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test_bit(ABS_WHEEL, bitmask_abs) ||
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test_bit(ABS_GAS, bitmask_abs) ||
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test_bit(ABS_BRAKE, bitmask_abs)) {
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devclass |= SDL_UDEV_DEVICE_JOYSTICK; /* ID_INPUT_JOYSTICK */
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}
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}
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if (test_bit(EV_REL, bitmask_ev) &&
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test_bit(REL_X, bitmask_rel) && test_bit(REL_Y, bitmask_rel) &&
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test_bit(BTN_MOUSE, bitmask_key)) {
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devclass |= SDL_UDEV_DEVICE_MOUSE; /* ID_INPUT_MOUSE */
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}
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/* the first 32 bits are ESC, numbers, and Q to D; if we have any of
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* those, consider it a keyboard device; do not test KEY_RESERVED, though */
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keyboard_mask = 0xFFFFFFFE;
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if ((bitmask_key[0] & keyboard_mask) != 0)
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devclass |= SDL_UDEV_DEVICE_KEYBOARD; /* ID_INPUT_KEYBOARD */
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return devclass;
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}
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#endif
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