src/evdev.h

   1 /*
   2  * Copyright © 2011, 2012 Intel Corporation
   3  * Copyright © 2013 Jonas Ådahl
   4  *
   5  * Permission to use, copy, modify, distribute, and sell this software and
   6  * its documentation for any purpose is hereby granted without fee, provided
   7  * that the above copyright notice appear in all copies and that both that
   8  * copyright notice and this permission notice appear in supporting
   9  * documentation, and that the name of the copyright holders not be used in
  10  * advertising or publicity pertaining to distribution of the software
  11  * without specific, written prior permission.  The copyright holders make
  12  * no representations about the suitability of this software for any
  13  * purpose.  It is provided "as is" without express or implied warranty.
  14  *
  15  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
  16  * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
  17  * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
  18  * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
  19  * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
  20  * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  21  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  22  */
  23
  24 #ifndef EVDEV_H
  25 #define EVDEV_H
  26
  27 #include "config.h"
  28
  29 #include "linux/input.h"
  30 #include <libevdev/libevdev.h>
  31
  32 #include "libinput-private.h"
  33
  34 enum evdev_event_type {
  35         EVDEV_NONE,
  36         EVDEV_ABSOLUTE_TOUCH_DOWN,
  37         EVDEV_ABSOLUTE_MOTION,
  38         EVDEV_ABSOLUTE_TOUCH_UP,
  39         EVDEV_ABSOLUTE_MT_DOWN,
  40         EVDEV_ABSOLUTE_MT_MOTION,
  41         EVDEV_ABSOLUTE_MT_UP,
  42         EVDEV_RELATIVE_MOTION,
  43 };
  44
  45 enum evdev_device_seat_capability {
  46         EVDEV_DEVICE_POINTER = (1 << 0),
  47         EVDEV_DEVICE_KEYBOARD = (1 << 1),
  48         EVDEV_DEVICE_TOUCH = (1 << 2)
  49 };
  50
  51 struct mt_slot {
  52         int32_t seat_slot;
  53         int32_t x, y;
  54 };
  55
  56 struct evdev_device {
  57         struct libinput_device base;
  58
  59         struct libinput_source *source;
  60
  61         struct evdev_dispatch *dispatch;
  62         struct libevdev *evdev;
  63         char *output_name;
  64         char *devnode;
  65         char *sysname;
  66         const char *devname;
  67         int fd;
  68         struct {
  69                 const struct input_absinfo *absinfo_x, *absinfo_y;
  70                 int fake_resolution;
  71
  72                 int32_t x, y;
  73                 int32_t seat_slot;
  74
  75                 int apply_calibration;
  76                 float calibration[6];
  77         } abs;
  78
  79         struct {
  80                 int slot;
  81                 struct mt_slot *slots;
  82                 size_t slots_len;
  83         } mt;
  84         struct mtdev *mtdev;
  85
  86         struct {
  87                 int dx, dy;
  88         } rel;
  89
  90         enum evdev_event_type pending_event;
  91         enum evdev_device_seat_capability seat_caps;
  92
  93         int is_mt;
  94
  95         struct {
  96                 struct motion_filter *filter;
  97         } pointer;
  98
  99         /* Bitmask of pressed keys used to ignore initial release events from
 100          * the kernel. */
 101         unsigned long key_mask[NLONGS(KEY_CNT)];
 102         /* Key counter used for multiplexing button events internally in
 103          * libinput. */
 104         uint8_t key_count[KEY_CNT];
 105 };
 106
 107 #define EVDEV_UNHANDLED_DEVICE ((struct evdev_device *) 1)
 108
 109 struct evdev_dispatch;
 110
 111 struct evdev_dispatch_interface {
 112         /* Process an evdev input event. */
 113         void (*process)(struct evdev_dispatch *dispatch,
 114                         struct evdev_device *device,
 115                         struct input_event *event,
 116                         uint64_t time);
 117
 118         /* Destroy an event dispatch handler and free all its resources. */
 119         void (*destroy)(struct evdev_dispatch *dispatch);
 120 };
 121
 122 struct evdev_dispatch {
 123         struct evdev_dispatch_interface *interface;
 124 };
 125
 126 struct evdev_device *
 127 evdev_device_create(struct libinput_seat *seat,
 128                     const char *devnode,
 129                     const char *sysname);
 130
 131 struct evdev_dispatch *
 132 evdev_touchpad_create(struct evdev_device *device);
 133
 134 struct evdev_dispatch *
 135 evdev_mt_touchpad_create(struct evdev_device *device);
 136
 137 void
 138 evdev_device_proces_event(struct libinput_event *event);
 139
 140 void
 141 evdev_device_led_update(struct evdev_device *device, enum libinput_led leds);
 142
 143 int
 144 evdev_device_get_keys(struct evdev_device *device, char *keys, size_t size);
 145
 146 const char *
 147 evdev_device_get_output(struct evdev_device *device);
 148
 149 const char *
 150 evdev_device_get_sysname(struct evdev_device *device);
 151
 152 const char *
 153 evdev_device_get_name(struct evdev_device *device);
 154
 155 unsigned int
 156 evdev_device_get_id_product(struct evdev_device *device);
 157
 158 unsigned int
 159 evdev_device_get_id_vendor(struct evdev_device *device);
 160
 161 void
 162 evdev_device_calibrate(struct evdev_device *device, float calibration[6]);
 163
 164 int
 165 evdev_device_has_capability(struct evdev_device *device,
 166                             enum libinput_device_capability capability);
 167
 168 int
 169 evdev_device_get_size(struct evdev_device *device,
 170                       double *w,
 171                       double *h);
 172
 173 double
 174 evdev_device_transform_x(struct evdev_device *device,
 175                          double x,
 176                          uint32_t width);
 177
 178 double
 179 evdev_device_transform_y(struct evdev_device *device,
 180                          double y,
 181                          uint32_t height);
 182
 183 void
 184 evdev_keyboard_notify_key(struct evdev_device *device,
 185                           uint32_t time,
 186                           int key,
 187                           enum libinput_key_state state);
 188
 189 void
 190 evdev_pointer_notify_button(struct evdev_device *device,
 191                             uint32_t time,
 192                             int button,
 193                             enum libinput_button_state state);
 194
 195 void
 196 evdev_device_remove(struct evdev_device *device);
 197
 198 void
 199 evdev_device_destroy(struct evdev_device *device);
 200
 201 static inline double
 202 evdev_convert_to_mm(const struct input_absinfo *absinfo, double v)
 203 {
 204         double value = v - absinfo->minimum;
 205         return value/absinfo->resolution;
 206 }
 207
 208 #endif /* EVDEV_H */