Mercurial > sdl-ios-xcode
annotate src/video/fbcon/SDL_fbelo.c @ 1643:51038e80ae59
More general fix for bug #189
The clipping is done at a higher level, and the low level functions are
passed clipped rectangles. Drivers which don't support source clipping
have not been changed, so the image will be squished instead of clipped,
but at least they will no longer crash when the destination rect was out
of bounds.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 17 Apr 2006 06:47:23 +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 } |
|
4f6c5f021323
Date: Thu, 26 Apr 2001 10:46:23 +0200
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
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 } |