Mercurial > sdl-ios-xcode
annotate src/video/fbcon/SDL_fbelo.c @ 4069:f19931785c42 SDL-1.2
An attempt at fixing Bugzilla #454.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Sun, 15 Jul 2007 14:14:45 +0000 |
| parents | d910939febfa |
| children | 782fd950bd46 c121d94672cb a1b03ba2fcd0 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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3 Copyright (C) 1997-2006 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
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6 modify it under the terms of the GNU Lesser General Public |
| 0 | 7 License as published by the Free Software Foundation; either |
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8 version 2.1 of the License, or (at your option) any later version. |
| 0 | 9 |
| 10 This library is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
|
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13 Lesser General Public License for more details. |
| 0 | 14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 0 | 18 |
| 19 Sam Lantinga | |
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20 slouken@libsdl.org |
| 0 | 21 */ |
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22 #include "SDL_config.h" |
| 0 | 23 |
| 24 #include <unistd.h> | |
| 25 #include <sys/time.h> | |
| 26 #include <ctype.h> | |
| 27 | |
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28 #include "SDL_stdinc.h" |
| 0 | 29 #include "SDL_fbvideo.h" |
| 30 #include "SDL_fbelo.h" | |
| 31 | |
| 32 /* | |
| 33 calibration default values | |
| 34 values are read from the following environment variables: | |
| 35 | |
| 36 SDL_ELO_MIN_X | |
| 37 SDL_ELO_MAX_X | |
| 38 SDL_ELO_MIN_Y | |
| 39 SDL_ELO_MAX_Y | |
| 40 */ | |
| 41 | |
| 42 static int ELO_MIN_X = 400; | |
| 43 static int ELO_MAX_X = 3670; | |
| 44 static int ELO_MIN_Y = 500; | |
| 45 static int ELO_MAX_Y = 3540; | |
| 46 | |
| 47 #define ELO_SNAP_SIZE 6 | |
| 48 #define ELO_TOUCH_BYTE 'T' | |
| 49 #define ELO_ID 'I' | |
| 50 #define ELO_MODE 'M' | |
| 51 #define ELO_PARAMETER 'P' | |
| 52 #define ELO_REPORT 'B' | |
| 53 #define ELO_ACK 'A' | |
| 54 | |
| 55 #define ELO_INIT_CHECKSUM 0xAA | |
| 56 | |
| 57 #define ELO_BTN_PRESS 0x01 | |
| 58 #define ELO_STREAM 0x02 | |
| 59 #define ELO_BTN_RELEASE 0x04 | |
| 60 | |
| 61 #define ELO_TOUCH_MODE 0x01 | |
| 62 #define ELO_STREAM_MODE 0x02 | |
| 63 #define ELO_UNTOUCH_MODE 0x04 | |
| 64 #define ELO_RANGE_CHECK_MODE 0x40 | |
| 65 #define ELO_TRIM_MODE 0x02 | |
| 66 #define ELO_CALIB_MODE 0x04 | |
| 67 #define ELO_SCALING_MODE 0x08 | |
| 68 #define ELO_TRACKING_MODE 0x40 | |
| 69 | |
| 70 #define ELO_SERIAL_MASK 0xF8 | |
| 71 | |
| 72 #define ELO_SERIAL_IO '0' | |
| 73 | |
| 74 #define ELO_MAX_TRIALS 3 | |
| 75 #define ELO_MAX_WAIT 100000 | |
| 76 #define ELO_UNTOUCH_DELAY 5 | |
| 77 #define ELO_REPORT_DELAY 1 | |
| 78 | |
| 79 /* eloParsePacket | |
| 80 */ | |
| 81 int eloParsePacket(unsigned char* mousebuf, int* dx, int* dy, int* button_state) { | |
| 82 static int elo_button = 0; | |
| 83 static int last_x = 0; | |
| 84 static int last_y = 0; | |
| 85 int x,y; | |
| 86 | |
| 87 /* Check if we have a touch packet */ | |
| 88 if (mousebuf[1] != ELO_TOUCH_BYTE) { | |
| 89 return 0; | |
| 90 } | |
| 91 | |
| 92 x = ((mousebuf[4] << 8) | mousebuf[3]); | |
| 93 y = ((mousebuf[6] << 8) | mousebuf[5]); | |
| 94 | |
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95 if((SDL_abs(x - last_x) > ELO_SNAP_SIZE) || (SDL_abs(y - last_y) > ELO_SNAP_SIZE)) { |
| 0 | 96 *dx = ((mousebuf[4] << 8) | mousebuf[3]); |
| 97 *dy = ((mousebuf[6] << 8) | mousebuf[5]); | |
| 98 } | |
| 99 else { | |
| 100 *dx = last_x; | |
| 101 *dy = last_y; | |
| 102 } | |
| 103 | |
| 104 last_x = *dx; | |
| 105 last_y = *dy; | |
| 106 | |
| 107 if ( (mousebuf[2] & 0x07) == ELO_BTN_PRESS ) { | |
| 108 elo_button = 1; | |
| 109 } | |
| 110 if ( (mousebuf[2] & 0x07) == ELO_BTN_RELEASE ) { | |
| 111 elo_button = 0; | |
| 112 } | |
| 113 | |
| 114 *button_state = elo_button; | |
| 115 return 1; | |
| 116 } | |
| 117 | |
| 118 /* Convert the raw coordinates from the ELO controller | |
| 119 to a screen position. | |
| 120 */ | |
| 121 void eloConvertXY(_THIS, int *dx, int *dy) { | |
| 122 int input_x = *dx; | |
| 123 int input_y = *dy; | |
| 124 int width = ELO_MAX_X - ELO_MIN_X; | |
| 125 int height = ELO_MAX_Y - ELO_MIN_Y; | |
| 126 | |
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127 *dx = ((int)cache_vinfo.xres - ((int)cache_vinfo.xres * (input_x - ELO_MIN_X)) / width); |
| 0 | 128 *dy = (cache_vinfo.yres * (input_y - ELO_MIN_Y)) / height; |
| 129 } | |
| 130 | |
| 131 | |
| 132 /* eloGetPacket | |
| 133 */ | |
| 134 int eloGetPacket(unsigned char* buffer, int* buffer_p, int* checksum, int fd) { | |
| 135 int num_bytes; | |
| 136 int ok; | |
| 137 | |
| 138 if(fd == 0) { | |
| 139 num_bytes = ELO_PACKET_SIZE; | |
| 140 } | |
| 141 else { | |
| 142 num_bytes = read(fd, | |
| 143 (char *) (buffer + *buffer_p), | |
| 144 ELO_PACKET_SIZE - *buffer_p); | |
| 145 } | |
| 146 | |
| 147 if (num_bytes < 0) { | |
| 148 #ifdef DEBUG_MOUSE | |
| 149 fprintf(stderr, "System error while reading from Elographics touchscreen.\n"); | |
| 150 #endif | |
| 151 return 0; | |
| 152 } | |
| 153 | |
| 154 while (num_bytes) { | |
| 155 if ((*buffer_p == 0) && (buffer[0] != ELO_START_BYTE)) { | |
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156 SDL_memcpy(&buffer[0], &buffer[1], num_bytes-1); |
| 0 | 157 } |
| 158 else { | |
| 159 if (*buffer_p < ELO_PACKET_SIZE-1) { | |
| 160 *checksum = *checksum + buffer[*buffer_p]; | |
| 161 *checksum = *checksum % 256; | |
| 162 } | |
| 163 (*buffer_p)++; | |
| 164 } | |
| 165 num_bytes--; | |
| 166 } | |
| 167 | |
| 168 if (*buffer_p == ELO_PACKET_SIZE) { | |
| 169 ok = (*checksum == buffer[ELO_PACKET_SIZE-1]); | |
| 170 *checksum = ELO_INIT_CHECKSUM; | |
| 171 *buffer_p = 0; | |
| 172 | |
| 173 if (!ok) { | |
| 174 return 0; | |
| 175 } | |
| 176 | |
| 177 return 1; | |
| 178 } | |
| 179 else { | |
| 180 return 0; | |
| 181 } | |
| 182 } | |
| 183 | |
| 184 /* eloSendPacket | |
| 185 */ | |
| 186 | |
| 187 int eloSendPacket(unsigned char* packet, int fd) | |
| 188 { | |
| 189 int i, result; | |
| 190 int sum = ELO_INIT_CHECKSUM; | |
| 191 | |
| 192 packet[0] = ELO_START_BYTE; | |
| 193 for (i = 0; i < ELO_PACKET_SIZE-1; i++) { | |
| 194 sum += packet[i]; | |
| 195 sum &= 0xFF; | |
| 196 } | |
| 197 packet[ELO_PACKET_SIZE-1] = sum; | |
| 198 | |
| 199 result = write(fd, packet, ELO_PACKET_SIZE); | |
| 200 | |
| 201 if (result != ELO_PACKET_SIZE) { | |
| 202 #ifdef DEBUG_MOUSE | |
| 203 printf("System error while sending to Elographics touchscreen.\n"); | |
| 204 #endif | |
| 205 return 0; | |
| 206 } | |
| 207 else { | |
| 208 return 1; | |
| 209 } | |
| 210 } | |
| 211 | |
| 212 | |
| 213 /* eloWaitForInput | |
| 214 */ | |
| 215 int eloWaitForInput(int fd, int timeout) | |
| 216 { | |
| 217 fd_set readfds; | |
| 218 struct timeval to; | |
| 219 int r; | |
| 220 | |
| 221 FD_ZERO(&readfds); | |
| 222 FD_SET(fd, &readfds); | |
| 223 to.tv_sec = 0; | |
| 224 to.tv_usec = timeout; | |
| 225 | |
| 226 r = select(FD_SETSIZE, &readfds, NULL, NULL, &to); | |
| 227 return r; | |
| 228 } | |
| 229 | |
| 230 /* eloWaitReply | |
| 231 */ | |
| 232 int eloWaitReply(unsigned char type, unsigned char *reply, int fd) { | |
| 233 int ok; | |
| 234 int i, result; | |
| 235 int reply_p = 0; | |
| 236 int sum = ELO_INIT_CHECKSUM; | |
| 237 | |
| 238 i = ELO_MAX_TRIALS; | |
| 239 do { | |
| 240 ok = 0; | |
| 241 | |
| 242 result = eloWaitForInput(fd, ELO_MAX_WAIT); | |
| 243 | |
| 244 if (result > 0) { | |
| 245 ok = eloGetPacket(reply, &reply_p, &sum, fd); | |
| 246 | |
| 247 if (ok && reply[1] != type && type != ELO_PARAMETER) { | |
| 248 #ifdef DEBUG_MOUSE | |
| 249 fprintf(stderr, "Wrong reply received\n"); | |
| 250 #endif | |
| 251 ok = 0; | |
| 252 } | |
| 253 } | |
| 254 else { | |
| 255 #ifdef DEBUG_MOUSE | |
| 256 fprintf(stderr, "No input!\n"); | |
| 257 #endif | |
| 258 } | |
| 259 | |
| 260 if (result == 0) { | |
| 261 i--; | |
| 262 } | |
| 263 } while(!ok && (i>0)); | |
| 264 | |
| 265 return ok; | |
| 266 } | |
| 267 | |
| 268 | |
| 269 /* eloWaitAck | |
| 270 */ | |
| 271 | |
| 272 int eloWaitAck(int fd) { | |
| 273 unsigned char packet[ELO_PACKET_SIZE]; | |
| 274 int i, nb_errors; | |
| 275 | |
| 276 if (eloWaitReply(ELO_ACK, packet, fd)) { | |
| 277 for (i = 0, nb_errors = 0; i < 4; i++) { | |
| 278 if (packet[2 + i] != '0') { | |
| 279 nb_errors++; | |
| 280 } | |
| 281 } | |
| 282 | |
| 283 if (nb_errors != 0) { | |
| 284 #ifdef DEBUG_MOUSE | |
| 285 fprintf(stderr, "Elographics acknowledge packet reports %d errors\n", nb_errors); | |
| 286 #endif | |
| 287 } | |
| 288 return 1; | |
| 289 } | |
| 290 else { | |
| 291 return 0; | |
| 292 } | |
| 293 } | |
| 294 | |
| 295 | |
| 296 /* eloSendQuery -- | |
| 297 */ | |
| 298 int eloSendQuery(unsigned char *request, unsigned char* reply, int fd) { | |
| 299 int ok; | |
| 300 | |
| 301 if (eloSendPacket(request, fd)) { | |
| 302 ok = eloWaitReply(toupper(request[1]), reply, fd); | |
| 303 if (ok) { | |
| 304 ok = eloWaitAck(fd); | |
| 305 } | |
| 306 return ok; | |
| 307 } | |
| 308 else { | |
| 309 return 0; | |
| 310 } | |
| 311 } | |
| 312 | |
| 313 | |
| 314 /* eloSendControl | |
| 315 */ | |
| 316 int eloSendControl(unsigned char* control, int fd) { | |
| 317 if (eloSendPacket(control, fd)) { | |
| 318 return eloWaitAck(fd); | |
| 319 } | |
| 320 else { | |
| 321 return 0; | |
| 322 } | |
| 323 } | |
| 324 | |
| 325 /* eloInitController | |
| 326 */ | |
| 327 int eloInitController(int fd) { | |
| 328 unsigned char req[ELO_PACKET_SIZE]; | |
| 329 unsigned char reply[ELO_PACKET_SIZE]; | |
| 330 const char *buffer = NULL; | |
| 331 int result = 0; | |
| 332 | |
| 333 struct termios mouse_termios; | |
| 334 | |
| 335 /* try to read the calibration values */ | |
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336 buffer = SDL_getenv("SDL_ELO_MIN_X"); |
| 0 | 337 if(buffer) { |
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338 ELO_MIN_X = SDL_atoi(buffer); |
| 0 | 339 } |
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340 buffer = SDL_getenv("SDL_ELO_MAX_X"); |
| 0 | 341 if(buffer) { |
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342 ELO_MAX_X = SDL_atoi(buffer); |
| 0 | 343 } |
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344 buffer = SDL_getenv("SDL_ELO_MIN_Y"); |
| 0 | 345 if(buffer) { |
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346 ELO_MIN_Y = SDL_atoi(buffer); |
| 0 | 347 } |
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348 buffer = SDL_getenv("SDL_ELO_MAX_Y"); |
| 0 | 349 if(buffer) { |
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350 ELO_MAX_Y = SDL_atoi(buffer); |
| 0 | 351 } |
| 352 | |
| 353 #ifdef DEBUG_MOUSE | |
| 354 fprintf( stderr, "ELO calibration values:\nmin_x: %i\nmax_x: %i\nmin_y: %i\nmax_y: %i\n", | |
| 355 ELO_MIN_X, | |
| 356 ELO_MAX_X, | |
| 357 ELO_MIN_Y, | |
| 358 ELO_MAX_Y); | |
| 359 #endif | |
| 360 | |
| 361 /* set comm params */ | |
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362 SDL_memset(&mouse_termios, 0, sizeof(mouse_termios)); |
| 0 | 363 mouse_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL; |
| 364 mouse_termios.c_cc[VMIN] = 1; | |
| 365 result = tcsetattr(fd, TCSANOW, &mouse_termios); | |
| 366 | |
| 367 if (result < 0) { | |
| 368 #ifdef DEBUG_MOUSE | |
| 369 fprintf( stderr, "Unable to configure Elographics touchscreen port\n"); | |
| 370 #endif | |
| 371 return 0; | |
| 372 } | |
| 373 | |
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374 SDL_memset(req, 0, ELO_PACKET_SIZE); |
| 0 | 375 req[1] = tolower(ELO_PARAMETER); |
| 376 if (!eloSendQuery(req, reply, fd)) { | |
| 377 #ifdef DEBUG_MOUSE | |
| 378 fprintf( stderr, "Not at the specified rate or model 2310, will continue\n"); | |
| 379 #endif | |
| 380 } | |
| 381 | |
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382 SDL_memset(req, 0, ELO_PACKET_SIZE); |
| 0 | 383 req[1] = tolower(ELO_ID); |
| 384 if (eloSendQuery(req, reply, fd)) { | |
| 385 #ifdef DEBUG_MOUSE | |
| 386 fprintf(stderr, "Ok, controller configured!\n"); | |
| 387 #endif | |
| 388 } | |
| 389 else { | |
| 390 #ifdef DEBUG_MOUSE | |
| 391 fprintf( stderr, "Unable to ask Elographics touchscreen identification\n"); | |
| 392 #endif | |
| 393 return 0; | |
| 394 } | |
| 395 | |
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396 SDL_memset(req, 0, ELO_PACKET_SIZE); |
| 0 | 397 req[1] = ELO_MODE; |
| 398 req[3] = ELO_TOUCH_MODE | ELO_STREAM_MODE | ELO_UNTOUCH_MODE; | |
| 399 req[4] = ELO_TRACKING_MODE; | |
| 400 if (!eloSendControl(req, fd)) { | |
| 401 #ifdef DEBUG_MOUSE | |
| 402 fprintf( stderr, "Unable to change Elographics touchscreen operating mode\n"); | |
| 403 #endif | |
| 404 return 0; | |
| 405 } | |
| 406 | |
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407 SDL_memset(req, 0, ELO_PACKET_SIZE); |
| 0 | 408 req[1] = ELO_REPORT; |
| 409 req[2] = ELO_UNTOUCH_DELAY; | |
| 410 req[3] = ELO_REPORT_DELAY; | |
| 411 if (!eloSendControl(req, fd)) { | |
| 412 #ifdef DEBUG_MOUSE | |
| 413 fprintf( stderr, "Unable to change Elographics touchscreen reports timings\n"); | |
| 414 #endif | |
| 415 return 0; | |
| 416 } | |
| 417 | |
| 418 return 1; | |
| 419 } | |
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420 |
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421 int eloReadPosition(_THIS, int fd, int* x, int* y, int* button_state, int* realx, int* realy) { |
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422 unsigned char buffer[ELO_PACKET_SIZE]; |
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423 int pointer = 0; |
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424 int checksum = ELO_INIT_CHECKSUM; |
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425 |
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426 while(pointer < ELO_PACKET_SIZE) { |
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427 if(eloGetPacket(buffer, &pointer, &checksum, fd)) { |
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428 break; |
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429 } |
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430 } |
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|
431 |
|
4f6c5f021323
Date: Thu, 26 Apr 2001 10:46:23 +0200
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
432 if(!eloParsePacket(buffer, realx, realy, button_state)) { |
|
4f6c5f021323
Date: Thu, 26 Apr 2001 10:46:23 +0200
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
433 return 0; |
|
4f6c5f021323
Date: Thu, 26 Apr 2001 10:46:23 +0200
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
434 } |
|
4f6c5f021323
Date: Thu, 26 Apr 2001 10:46:23 +0200
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
435 |
|
4f6c5f021323
Date: Thu, 26 Apr 2001 10:46:23 +0200
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
436 *x = *realx; |
|
4f6c5f021323
Date: Thu, 26 Apr 2001 10:46:23 +0200
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
437 *y = *realy; |
|
4f6c5f021323
Date: Thu, 26 Apr 2001 10:46:23 +0200
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
438 |
|
4f6c5f021323
Date: Thu, 26 Apr 2001 10:46:23 +0200
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
439 eloConvertXY(this, x, y); |
|
4f6c5f021323
Date: Thu, 26 Apr 2001 10:46:23 +0200
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
440 |
|
4f6c5f021323
Date: Thu, 26 Apr 2001 10:46:23 +0200
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
441 return 1; |
|
4f6c5f021323
Date: Thu, 26 Apr 2001 10:46:23 +0200
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
442 } |