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                 struct matrix calibration;
  77                 struct matrix usermatrix; /* as supplied by the caller */
  78         } abs;
  79
  80         struct {
  81                 int slot;
  82                 struct mt_slot *slots;
  83                 size_t slots_len;
  84         } mt;
  85         struct mtdev *mtdev;
  86
  87         struct {
  88                 int dx, dy;
  89         } rel;
  90
  91         enum evdev_event_type pending_event;
  92         enum evdev_device_seat_capability seat_caps;
  93
  94         int is_mt;
  95
  96         struct {
  97                 struct motion_filter *filter;
  98         } pointer;
  99
 100         /* Bitmask of pressed keys used to ignore initial release events from
 101          * the kernel. */
 102         unsigned long key_mask[NLONGS(KEY_CNT)];
 103         /* Key counter used for multiplexing button events internally in
 104          * libinput. */
 105         uint8_t key_count[KEY_CNT];
 106 };
 107
 108 #define EVDEV_UNHANDLED_DEVICE ((struct evdev_device *) 1)
 109
 110 struct evdev_dispatch;
 111
 112 struct evdev_dispatch_interface {
 113         /* Process an evdev input event. */
 114         void (*process)(struct evdev_dispatch *dispatch,
 115                         struct evdev_device *device,
 116                         struct input_event *event,
 117                         uint64_t time);
 118
 119         /* Destroy an event dispatch handler and free all its resources. */
 120         void (*destroy)(struct evdev_dispatch *dispatch);
 121 };
 122
 123 struct evdev_dispatch {
 124         struct evdev_dispatch_interface *interface;
 125         struct libinput_device_config_calibration calibration;
 126 };
 127
 128 struct evdev_device *
 129 evdev_device_create(struct libinput_seat *seat,
 130                     const char *devnode,
 131                     const char *sysname);
 132
 133 struct evdev_dispatch *
 134 evdev_touchpad_create(struct evdev_device *device);
 135
 136 struct evdev_dispatch *
 137 evdev_mt_touchpad_create(struct evdev_device *device);
 138
 139 void
 140 evdev_device_proces_event(struct libinput_event *event);
 141
 142 void
 143 evdev_device_led_update(struct evdev_device *device, enum libinput_led leds);
 144
 145 int
 146 evdev_device_get_keys(struct evdev_device *device, char *keys, size_t size);
 147
 148 const char *
 149 evdev_device_get_output(struct evdev_device *device);
 150
 151 const char *
 152 evdev_device_get_sysname(struct evdev_device *device);
 153
 154 const char *
 155 evdev_device_get_name(struct evdev_device *device);
 156
 157 unsigned int
 158 evdev_device_get_id_product(struct evdev_device *device);
 159
 160 unsigned int
 161 evdev_device_get_id_vendor(struct evdev_device *device);
 162
 163 void
 164 evdev_device_calibrate(struct evdev_device *device,
 165                        const float calibration[6]);
 166
 167 int
 168 evdev_device_has_capability(struct evdev_device *device,
 169                             enum libinput_device_capability capability);
 170
 171 int
 172 evdev_device_get_size(struct evdev_device *device,
 173                       double *w,
 174                       double *h);
 175
 176 double
 177 evdev_device_transform_x(struct evdev_device *device,
 178                          double x,
 179                          uint32_t width);
 180
 181 double
 182 evdev_device_transform_y(struct evdev_device *device,
 183                          double y,
 184                          uint32_t height);
 185
 186 void
 187 evdev_keyboard_notify_key(struct evdev_device *device,
 188                           uint32_t time,
 189                           int key,
 190                           enum libinput_key_state state);
 191
 192 void
 193 evdev_pointer_notify_button(struct evdev_device *device,
 194                             uint32_t time,
 195                             int button,
 196                             enum libinput_button_state state);
 197
 198 void
 199 evdev_device_remove(struct evdev_device *device);
 200
 201 void
 202 evdev_device_destroy(struct evdev_device *device);
 203
 204 static inline double
 205 evdev_convert_to_mm(const struct input_absinfo *absinfo, double v)
 206 {
 207         double value = v - absinfo->minimum;
 208         return value/absinfo->resolution;
 209 }
 210
 211 #endif /* EVDEV_H */