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
  31 #include "libinput-private.h"
  32
  33 #define MAX_SLOTS 16
  34
  35 enum evdev_event_type {
  36         EVDEV_NONE,
  37         EVDEV_ABSOLUTE_TOUCH_DOWN,
  38         EVDEV_ABSOLUTE_MOTION,
  39         EVDEV_ABSOLUTE_TOUCH_UP,
  40         EVDEV_ABSOLUTE_MT_DOWN,
  41         EVDEV_ABSOLUTE_MT_MOTION,
  42         EVDEV_ABSOLUTE_MT_UP,
  43         EVDEV_RELATIVE_MOTION,
  44 };
  45
  46 enum evdev_device_seat_capability {
  47         EVDEV_DEVICE_POINTER = (1 << 0),
  48         EVDEV_DEVICE_KEYBOARD = (1 << 1),
  49         EVDEV_DEVICE_TOUCH = (1 << 2)
  50 };
  51
  52 struct evdev_device {
  53         struct libinput_device base;
  54
  55         struct libinput_source *source;
  56
  57         struct evdev_dispatch *dispatch;
  58         char *output_name;
  59         char *devnode;
  60         char *sysname;
  61         char *devname;
  62         int fd;
  63         struct {
  64                 int min_x, max_x, min_y, max_y;
  65                 int32_t x, y;
  66
  67                 int apply_calibration;
  68                 float calibration[6];
  69         } abs;
  70
  71         struct {
  72                 int slot;
  73                 struct {
  74                         int32_t x, y;
  75                 } slots[MAX_SLOTS];
  76         } mt;
  77         struct mtdev *mtdev;
  78
  79         struct {
  80                 li_fixed_t dx, dy;
  81         } rel;
  82
  83         enum evdev_event_type pending_event;
  84         enum evdev_device_seat_capability seat_caps;
  85
  86         int is_mt;
  87 };
  88
  89 /* copied from udev/extras/input_id/input_id.c */
  90 /* we must use this kernel-compatible implementation */
  91 #define BITS_PER_LONG (sizeof(unsigned long) * 8)
  92 #define NBITS(x) ((((x)-1)/BITS_PER_LONG)+1)
  93 #define OFF(x)  ((x)%BITS_PER_LONG)
  94 #define BIT(x)  (1UL<<OFF(x))
  95 #define LONG(x) ((x)/BITS_PER_LONG)
  96 #define TEST_BIT(array, bit)    ((array[LONG(bit)] >> OFF(bit)) & 1)
  97 /* end copied */
  98
  99 #define EVDEV_UNHANDLED_DEVICE ((struct evdev_device *) 1)
 100
 101 struct evdev_dispatch;
 102
 103 struct evdev_dispatch_interface {
 104         /* Process an evdev input event. */
 105         void (*process)(struct evdev_dispatch *dispatch,
 106                         struct evdev_device *device,
 107                         struct input_event *event,
 108                         uint32_t time);
 109
 110         /* Destroy an event dispatch handler and free all its resources. */
 111         void (*destroy)(struct evdev_dispatch *dispatch);
 112 };
 113
 114 struct evdev_dispatch {
 115         struct evdev_dispatch_interface *interface;
 116 };
 117
 118 struct evdev_device *
 119 evdev_device_create(struct libinput_seat *seat,
 120                     const char *devnode,
 121                     const char *sysname);
 122
 123 struct evdev_dispatch *
 124 evdev_touchpad_create(struct evdev_device *device);
 125
 126 void
 127 evdev_device_proces_event(struct libinput_event *event);
 128
 129 void
 130 evdev_device_led_update(struct evdev_device *device, enum libinput_led leds);
 131
 132 int
 133 evdev_device_get_keys(struct evdev_device *device, char *keys, size_t size);
 134
 135 const char *
 136 evdev_device_get_output(struct evdev_device *device);
 137
 138 const char *
 139 evdev_device_get_sysname(struct evdev_device *device);
 140
 141 void
 142 evdev_device_calibrate(struct evdev_device *device, float calibration[6]);
 143
 144 int
 145 evdev_device_has_capability(struct evdev_device *device,
 146                             enum libinput_device_capability capability);
 147
 148 li_fixed_t
 149 evdev_device_transform_x(struct evdev_device *device,
 150                          li_fixed_t x,
 151                          uint32_t width);
 152
 153 li_fixed_t
 154 evdev_device_transform_y(struct evdev_device *device,
 155                          li_fixed_t y,
 156                          uint32_t height);
 157
 158 void
 159 evdev_device_remove(struct evdev_device *device);
 160
 161 void
 162 evdev_device_destroy(struct evdev_device *device);
 163
 164 #endif /* EVDEV_H */