| 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; |
| 22 | int (*pts_read)(struct tsdev *dev, struct ts_sample *sample, int nr); |
| 23 | int (*pts_fd)(struct tsdev *dev); |
| 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 |
| 81 | ltsh = dlopen("/usr/lib/libts-1.0.so.0", RTLD_NOW|RTLD_GLOBAL); |
| 82 | if (ltsh == NULL) |
| 83 | ltsh = dlopen("/usr/lib/libts-0.0.so.0", RTLD_NOW|RTLD_GLOBAL); |
| 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"); |
| 92 | pts_fd = dlsym(ltsh, "ts_fd"); |
| 93 | pts_close = dlsym(ltsh, "ts_close"); |
| 94 | if (pts_open == NULL || pts_config == NULL || pts_read == NULL |
| 95 | || pts_fd == NULL || pts_close == NULL) { |
| 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 |
| 108 | #ifdef __ARM_ARCH_7A__ |
| 109 | pl_set_gun_rect(0, 0, 800, 480); |
| 110 | #else |
| 111 | pl_set_gun_rect(0, 0, 320, 240); |
| 112 | #endif |
| 113 | return ts; |
| 114 | |
| 115 | fail_config: |
| 116 | pts_close(ts); |
| 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 | |