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1 | /* |
2 | * (C) GraÅžvydas "notaz" Ignotas, 2011 |
3 | * |
4 | * This work is licensed under the terms of any of these licenses |
5 | * (at your option): |
6 | * - GNU GPL, version 2 or later. |
7 | * - GNU LGPL, version 2.1 or later. |
8 | * See the COPYING file in the top-level directory. |
9 | */ |
10 | |
11 | #include <stdio.h> |
12 | #include <stdlib.h> |
13 | #include <dlfcn.h> |
14 | #include <tslib.h> |
15 | #include "plugin_lib.h" |
16 | #include "pl_gun_ts.h" |
17 | #include "menu.h" |
18 | #include "../plugins/dfinput/main.h" |
19 | |
20 | static int gun_x, gun_y, gun_in; |
21 | static int ts_multiplier_x, ts_multiplier_y, ts_offs_x, ts_offs_y; |
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22 | int (*pts_read)(struct tsdev *dev, struct ts_sample *sample, int nr); |
23 | int (*pts_fd)(struct tsdev *dev); |
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24 | |
25 | #define limit(v, min, max) \ |
26 | if (v < min) v = min; \ |
27 | else if (v > max) v = max |
28 | |
29 | void pl_gun_ts_update(struct tsdev *ts, int *x, int *y, int *in) |
30 | { |
31 | struct ts_sample sample; |
32 | int sx = 0, sy = 0, sp = 0, updated = 0; |
33 | |
34 | if (ts != NULL) { |
35 | while (pts_read(ts, &sample, 1) > 0) { |
36 | sx = sample.x; |
37 | sy = sample.y; |
38 | sp = sample.pressure; |
39 | updated = 1; |
40 | } |
41 | |
42 | if (updated) { |
43 | gun_x = (sx - ts_offs_x) * ts_multiplier_x >> 10; |
44 | gun_y = (sy - ts_offs_y) * ts_multiplier_y >> 10; |
45 | limit(gun_x, 0, 1023); |
46 | limit(gun_y, 0, 1023); |
47 | if (sp && !(g_opts & OPT_TSGUN_NOTRIGGER)) |
48 | gun_in |= GUNIN_TRIGGER; |
49 | else |
50 | gun_in &= ~GUNIN_TRIGGER; |
51 | } |
52 | } |
53 | |
54 | *x = gun_x; |
55 | *y = gun_y; |
56 | *in = gun_in | in_state_gun; |
57 | } |
58 | |
59 | void pl_set_gun_rect(int x, int y, int w, int h) |
60 | { |
61 | ts_offs_x = x; |
62 | ts_offs_y = y; |
63 | ts_multiplier_x = (1<<20) / w; |
64 | ts_multiplier_y = (1<<20) / h; |
65 | } |
66 | |
67 | struct tsdev *pl_gun_ts_init(void) |
68 | { |
69 | struct tsdev *(*pts_open)(const char *dev_name, int nonblock) = NULL; |
70 | int (*pts_config)(struct tsdev *) = NULL; |
71 | int (*pts_close)(struct tsdev *) = NULL; |
72 | const char *tsdevname; |
73 | struct tsdev *ts; |
74 | void *ltsh; |
75 | |
76 | tsdevname = getenv("TSLIB_TSDEVICE"); |
77 | if (tsdevname == NULL) |
78 | tsdevname = "/dev/input/touchscreen0"; |
79 | |
80 | // avoid hard dep on tslib |
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81 | ltsh = dlopen("/usr/lib/libts-1.0.so.0", RTLD_NOW|RTLD_GLOBAL); |
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82 | if (ltsh == NULL) |
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83 | ltsh = dlopen("/usr/lib/libts-0.0.so.0", RTLD_NOW|RTLD_GLOBAL); |
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84 | if (ltsh == NULL) { |
85 | fprintf(stderr, "%s\n", dlerror()); |
86 | goto fail; |
87 | } |
88 | |
89 | pts_open = dlsym(ltsh, "ts_open"); |
90 | pts_config = dlsym(ltsh, "ts_config"); |
91 | pts_read = dlsym(ltsh, "ts_read"); |
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92 | pts_fd = dlsym(ltsh, "ts_fd"); |
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93 | pts_close = dlsym(ltsh, "ts_close"); |
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94 | if (pts_open == NULL || pts_config == NULL || pts_read == NULL |
95 | || pts_fd == NULL || pts_close == NULL) { |
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96 | fprintf(stderr, "%s\n", dlerror()); |
97 | goto fail_dlsym; |
98 | } |
99 | |
100 | ts = pts_open(tsdevname, 1); |
101 | if (ts == NULL) |
102 | goto fail_open; |
103 | if (pts_config(ts) != 0) |
104 | goto fail_config; |
105 | |
106 | // FIXME: we should be able to get this somewhere |
107 | // the problem is this doesn't always match resolution due to different display modes |
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108 | #ifdef __ARM_ARCH_7A__ |
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109 | pl_set_gun_rect(0, 0, 800, 480); |
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110 | #else |
111 | pl_set_gun_rect(0, 0, 320, 240); |
112 | #endif |
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113 | return ts; |
114 | |
115 | fail_config: |
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116 | pts_close(ts); |
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117 | fail_open: |
118 | fail_dlsym: |
119 | dlclose(ltsh); |
120 | ltsh = NULL; |
121 | fail: |
122 | fprintf(stderr, "Could not open touchscreen\n"); |
123 | return NULL; |
124 | } |
125 | |