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 };
 103
 104 #define EVDEV_UNHANDLED_DEVICE ((struct evdev_device *) 1)
 105
 106 struct evdev_dispatch;
 107
 108 struct evdev_dispatch_interface {
 109         /* Process an evdev input event. */
 110         void (*process)(struct evdev_dispatch *dispatch,
 111                         struct evdev_device *device,
 112                         struct input_event *event,
 113                         uint64_t time);
 114
 115         /* Destroy an event dispatch handler and free all its resources. */
 116         void (*destroy)(struct evdev_dispatch *dispatch);
 117 };
 118
 119 struct evdev_dispatch {
 120         struct evdev_dispatch_interface *interface;
 121 };
 122
 123 struct evdev_device *
 124 evdev_device_create(struct libinput_seat *seat,
 125                     const char *devnode,
 126                     const char *sysname);
 127
 128 struct evdev_dispatch *
 129 evdev_touchpad_create(struct evdev_device *device);
 130
 131 struct evdev_dispatch *
 132 evdev_mt_touchpad_create(struct evdev_device *device);
 133
 134 void
 135 evdev_device_proces_event(struct libinput_event *event);
 136
 137 void
 138 evdev_device_led_update(struct evdev_device *device, enum libinput_led leds);
 139
 140 int
 141 evdev_device_get_keys(struct evdev_device *device, char *keys, size_t size);
 142
 143 const char *
 144 evdev_device_get_output(struct evdev_device *device);
 145
 146 const char *
 147 evdev_device_get_sysname(struct evdev_device *device);
 148
 149 const char *
 150 evdev_device_get_name(struct evdev_device *device);
 151
 152 unsigned int
 153 evdev_device_get_id_product(struct evdev_device *device);
 154
 155 unsigned int
 156 evdev_device_get_id_vendor(struct evdev_device *device);
 157
 158 void
 159 evdev_device_calibrate(struct evdev_device *device, float calibration[6]);
 160
 161 int
 162 evdev_device_has_capability(struct evdev_device *device,
 163                             enum libinput_device_capability capability);
 164
 165 int
 166 evdev_device_get_size(struct evdev_device *device,
 167                       double *w,
 168                       double *h);
 169
 170 double
 171 evdev_device_transform_x(struct evdev_device *device,
 172                          double x,
 173                          uint32_t width);
 174
 175 double
 176 evdev_device_transform_y(struct evdev_device *device,
 177                          double y,
 178                          uint32_t height);
 179
 180 void
 181 evdev_device_remove(struct evdev_device *device);
 182
 183 void
 184 evdev_device_destroy(struct evdev_device *device);
 185
 186 static inline double
 187 evdev_convert_to_mm(const struct input_absinfo *absinfo, double v)
 188 {
 189         double value = v - absinfo->minimum;
 190         return value/absinfo->resolution;
 191 }
 192
 193 #endif /* EVDEV_H */