| 1 | /*
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| 2 | * Copyright (c) 2012 Martin Sucha
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | #ifndef ISDV4_H_
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| 30 | #define ISDV4_H_
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| 31 |
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| 32 | #include <async.h>
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| 33 |
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| 34 | typedef struct isdv4_event isdv4_event_t;
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| 35 |
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| 36 | typedef void (*isdv4_event_fn)(const isdv4_event_t *);
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| 37 |
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| 38 | typedef struct {
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| 39 | /* Stylus information */
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| 40 | unsigned int stylus_max_x;
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| 41 | unsigned int stylus_max_y;
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| 42 | unsigned int stylus_max_pressure;
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| 43 | unsigned int stylus_max_xtilt;
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| 44 | unsigned int stylus_max_ytilt;
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| 45 | bool stylus_tilt_supported;
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| 46 |
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| 47 | /* Touch information */
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| 48 | unsigned int touch_type;
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| 49 | unsigned int touch_max_x;
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| 50 | unsigned int touch_max_y;
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| 51 |
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| 52 | /* Event state */
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| 53 | bool stylus_in_proximity;
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| 54 | bool stylus_is_eraser;
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| 55 | bool tip_pressed; /* Reported as stylus button 1 */
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| 56 | bool button1_pressed; /* Reported as stylus button 2 */
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| 57 | bool button2_pressed; /* Reported as stylus button 3 */
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| 58 | bool finger1_pressed; /* Reported as touch button 1 */
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| 59 |
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| 60 | /* Session to the serial device */
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| 61 | async_sess_t *sess;
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| 62 |
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| 63 | /* Receive buffer state */
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| 64 | uint8_t *buf;
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| 65 | size_t buf_size;
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| 66 | size_t buf_end;
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| 67 |
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| 68 | /* Callbacks */
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| 69 | isdv4_event_fn emit_event_fn;
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| 70 | } isdv4_state_t;
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| 71 |
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| 72 | typedef enum {
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| 73 | UNKNOWN, PRESS, RELEASE, PROXIMITY_IN, PROXIMITY_OUT, MOVE
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| 74 | } isdv4_event_type_t;
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| 75 |
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| 76 | typedef enum {
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| 77 | STYLUS_TIP, STYLUS_ERASER, TOUCH
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| 78 | } isdv4_source_type_t;
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| 79 |
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| 80 | struct isdv4_event {
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| 81 | isdv4_event_type_t type;
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| 82 | isdv4_source_type_t source;
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| 83 | unsigned int x;
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| 84 | unsigned int y;
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| 85 | unsigned int pressure;
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| 86 | unsigned int button;
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| 87 | };
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| 88 |
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| 89 | extern int isdv4_init(isdv4_state_t *, async_sess_t *, isdv4_event_fn);
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| 90 | extern int isdv4_init_tablet(isdv4_state_t *);
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| 91 | extern int isdv4_read_events(isdv4_state_t *state);
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| 92 | extern void isdv4_fini(isdv4_state_t *);
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| 93 |
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| 94 | #endif
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