├── .gitignore ├── COPYING ├── Makefile ├── README ├── fbkeyboard.1 └── fbkeyboard.c /.gitignore: -------------------------------------------------------------------------------- 1 | fbkeyboard 2 | -------------------------------------------------------------------------------- /COPYING: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /Makefile: -------------------------------------------------------------------------------- 1 | fbkeyboard: fbkeyboard.c 2 | gcc -o fbkeyboard $(shell pkg-config --cflags freetype2) $(CPPFLAGS) $(CFLAGS) fbkeyboard.c $(LDFLAGS) $(shell pkg-config --libs freetype2) 3 | 4 | clean: 5 | rm -f fbkeyboard 6 | 7 | -------------------------------------------------------------------------------- /README: -------------------------------------------------------------------------------- 1 | fbkeyboard 2 | 3 | This is a framebuffer softkeyboard for use on devices with touchscreen input like smartphones. 4 | It was designed for the linux text console. 5 | It uses freetype2 lib to render fonts. 6 | Keystrokes will be send to the kernel using uinput. 7 | 8 | How to build: 9 | Just run make in this directory. 10 | 11 | How to run: 12 | # ./fbkeyboard [-h] [-d inputdevice] [-f font] [-r rotation] 13 | inputdevice has to be the device node of the touchscreen, eg: /dev/input/event1. 14 | If no inputdevice was given, the first device in /dev/input with absolute axes support will be used. 15 | font has to be a ttf file. If no font was given, "/usr/share/fonts/ttf-dejavu/DejaVuSans.ttf" will be used. 16 | rotation is a number between 0-3, 0 = normal, 1 = rotate CW, 2 = rotate 180 degrees, 3 = rotate CCW 17 | 18 | Useful tips: 19 | Use stty to adjust the console size to avoid overlapping the console and the keyboard. 20 | # stty rows 21 | 22 | -------------------------------------------------------------------------------- /fbkeyboard.1: -------------------------------------------------------------------------------- 1 | .TH FBKEYBOARD 1 "JUNE 2017" FBKEYBOARD "User Manuals" 2 | .SH NAME 3 | fbkeyboard \- on screen keyboard for fbdev 4 | .SH SYNOPSIS 5 | .B fbkeyboard 6 | [\fB\-d\fR \fIinputdevice\fR] 7 | [\fB\-f\fR \fIfont\fR] 8 | .SH DESCRIPTION 9 | This is a framebuffer softkeyboard for use on devices with 10 | touchscreen input like smartphones. It can be used on the linux 11 | text console. Before running \fBfbkeyboard\fR, use stty to reduce 12 | the console size to avoid overlapping the console and the keyboard. 13 | .PP 14 | .B stty 15 | rows \fInumber-of-rows 16 | 17 | .SH OPTIONS 18 | .TP 19 | .B \-d\fR \fIinputdevice\fR 20 | inputdevice has to be the device node of the touchscreen, 21 | eg: /dev/input/event1. If no inputdevice was given, the first 22 | device in /dev/input with absolute axes support will be used. 23 | .TP 24 | .B \-f\fR \fIfont\fR 25 | font has to be a ttf file. If no font was given, 26 | "/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf" will be used. 27 | .SH AUTHOR 28 | Julian Winkler 29 | .SH SEE ALSO 30 | .BR stty (1) 31 | 32 | -------------------------------------------------------------------------------- /fbkeyboard.c: -------------------------------------------------------------------------------- 1 | /* 2 | * fbkeyboard.c : framebuffer softkeyboard for touchscreen devices 3 | * 4 | * Copyright 2017 Julian Winkler 5 | * Copyright 2020 Ferenc Bakonyi 6 | * 7 | * This program is free software: you can redistribute it and/or modify 8 | * it under the terms of the GNU General Public License as published by 9 | * the Free Software Foundation, either version 3 of the License, or 10 | * (at your option) any later version. 11 | * 12 | * This program is distributed in the hope that it will be useful, 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 | * GNU General Public License for more details. 16 | * 17 | * You should have received a copy of the GNU General Public License 18 | * along with this program. If not, see . 19 | */ 20 | 21 | #include 22 | #include 23 | #include 24 | #include 25 | #include 26 | #include 27 | #include 28 | #include 29 | #include 30 | #include 31 | #include 32 | #include 33 | #include FT_FREETYPE_H 34 | 35 | volatile sig_atomic_t done = 0; 36 | 37 | char *font = "/usr/share/fonts/ttf-dejavu/DejaVuSans.ttf"; 38 | char *device = NULL; 39 | char *special[][7] = { 40 | { "Esc", "Tab", "F10", " / ", " - ", " . ", " \\ " }, 41 | { "Esc", "Tab", "F10", " ? ", " _ ", " > ", " | " }, 42 | }; 43 | 44 | char *layout[] = { 45 | "qwertyuiopasdfghjklzxcvbnm", 46 | "QWERTYUIOPASDFGHJKLZXCVBNM", 47 | "1234567890-=[];\'\\,.`/ ", 48 | "!@#$%^&*()_+{}:\"|<>~? " 49 | }; 50 | 51 | int layoutuse = 0; 52 | int ctrllock = 0; 53 | int altlock = 0; 54 | __u16 keys[][26] = { 55 | { KEY_ESC, KEY_TAB, KEY_F10, KEY_SLASH, KEY_MINUS, KEY_DOT, KEY_BACKSLASH }, 56 | { KEY_Q, KEY_W, KEY_E, KEY_R, KEY_T, KEY_Y, KEY_U, KEY_I, KEY_O, KEY_P, 57 | KEY_A, KEY_S, KEY_D, KEY_F, KEY_G, KEY_H, KEY_J, KEY_K, KEY_L, 58 | KEY_Z, KEY_X, KEY_C, KEY_V, KEY_B, KEY_N, KEY_M }, 59 | { KEY_1, KEY_2, KEY_3, KEY_4, KEY_5, KEY_6, KEY_7, KEY_8, KEY_9, KEY_0, 60 | KEY_MINUS, KEY_EQUAL, KEY_LEFTBRACE, KEY_RIGHTBRACE, KEY_SEMICOLON, KEY_APOSTROPHE, KEY_BACKSLASH, KEY_COMMA, KEY_DOT, 61 | KEY_GRAVE, KEY_SLASH, KEY_C, KEY_V, KEY_B, KEY_N, KEY_M }, 62 | { KEY_LEFTSHIFT, KEY_BACKSPACE }, 63 | { KEY_LEFTALT, KEY_SPACE, KEY_RIGHTCTRL, KEY_ENTER }, 64 | { KEY_HOME, KEY_UP, KEY_PAGEUP, 65 | KEY_LEFT, KEY_ENTER, KEY_RIGHT, 66 | KEY_END, KEY_DOWN, KEY_PAGEDOWN, 67 | KEY_RIGHTSHIFT } 68 | }; 69 | 70 | #define TOUCHCOLOR 0x4444ee 71 | #define BUTTONCOLOR 0x111122 72 | #define BACKLITCOLOR 0xff0000 73 | #define TERMCOLOR 0x000000 74 | int gap = 2; 75 | 76 | int rotate = 0; 77 | 78 | struct fb_var_screeninfo vinfo; 79 | struct fb_fix_screeninfo finfo; 80 | char *buf; 81 | unsigned int buflen; 82 | int fbheight; // of framebuffer 83 | int fbwidth; // of framebuffer 84 | int fblinelength; // of one line of framebuffer 85 | int height; // of one row of keys 86 | int width; // of keyboard (= width of screen) 87 | int linelength; // of one line of keyboard shape in bytes 88 | int landscape; // false = portrait 89 | 90 | FT_Face face; 91 | int advance; // offset to the next glyph 92 | 93 | int fduinput; 94 | struct input_event ie; 95 | int theight; // of touchscreen 96 | int twidth; // of touchscreen 97 | int trowh; // heigth of one keyboard row on touchscreen 98 | 99 | void fill_rect(int x, int y, int w, int h, int color) 100 | { 101 | int i, j, t; 102 | int32_t *line; 103 | switch (rotate) { 104 | case FB_ROTATE_UR: 105 | break; 106 | case FB_ROTATE_UD: 107 | x = width - x - w; 108 | y = (height * 5) - y - h; 109 | break; 110 | case FB_ROTATE_CW: 111 | y = (height * 5) - y - h; 112 | t = w; w = h; h = t; 113 | t = x; x = y; y = t; 114 | break; 115 | case FB_ROTATE_CCW: 116 | x = width - x - w; 117 | t = w; w = h; h = t; 118 | t = x; x = y; y = t; 119 | break; 120 | } 121 | for (i = 0; i < h; i++) { 122 | line = (int32_t *) (buf + linelength * (y + i)); 123 | for (j = 0; j < w; j++) { 124 | *(line + x + j) = color; 125 | } 126 | } 127 | } 128 | 129 | void draw_char(int x, int y, char c) 130 | { 131 | int i, j, t; 132 | int color; 133 | FT_Matrix matrix; 134 | switch (rotate) { 135 | case FB_ROTATE_UR: 136 | FT_Load_Char(face, c, FT_LOAD_RENDER); 137 | x += face->glyph->bitmap_left; 138 | y += (face->size->metrics.ascender >> 6) - face->glyph->bitmap_top; 139 | advance = face->glyph->advance.x >> 6; 140 | break; 141 | case FB_ROTATE_UD: 142 | matrix.xx = (FT_Fixed)(-1 * 0x10000L); 143 | matrix.xy = (FT_Fixed)(0); 144 | matrix.yx = (FT_Fixed)(0); 145 | matrix.yy = (FT_Fixed)(-1 * 0x10000L); 146 | FT_Set_Transform(face, &matrix, NULL); 147 | FT_Load_Char(face, c, FT_LOAD_RENDER); 148 | x = width - x; 149 | y = (height * 5) - y; 150 | x += (face->glyph->advance.x >> 6) - face->glyph->bitmap.width - face->glyph->bitmap_left; 151 | y -= (face->size->metrics.ascender >> 6) + face->glyph->bitmap_top; 152 | advance = -(face->glyph->advance.x >> 6); 153 | break; 154 | case FB_ROTATE_CW: 155 | matrix.xx = (FT_Fixed)(0); 156 | matrix.xy = (FT_Fixed)( 1 * 0x10000L); 157 | matrix.yx = (FT_Fixed)(-1 * 0x10000L); 158 | matrix.yy = (FT_Fixed)(0); 159 | FT_Set_Transform(face, &matrix, NULL); 160 | FT_Load_Char(face, c, FT_LOAD_RENDER); 161 | y = (height * 5) - y; 162 | x -= face->glyph->bitmap_top; 163 | y += face->glyph->bitmap_left - (face->size->metrics.ascender >> 6); 164 | t = x; x = y; y = t; 165 | advance = -(face->glyph->advance.y >> 6); 166 | break; 167 | case FB_ROTATE_CCW: 168 | matrix.xx = (FT_Fixed)(0); 169 | matrix.xy = (FT_Fixed)(-1 * 0x10000L); 170 | matrix.yx = (FT_Fixed)( 1 * 0x10000L); 171 | matrix.yy = (FT_Fixed)(0); 172 | FT_Set_Transform(face, &matrix, NULL); 173 | FT_Load_Char(face, c, FT_LOAD_RENDER); 174 | x = width - x; 175 | x -= face->glyph->bitmap_top; 176 | y += face->glyph->bitmap_left + (face->size->metrics.ascender >> 6); 177 | t = x; x = y; y = t; 178 | advance = face->glyph->advance.y >> 6; 179 | break; 180 | } 181 | for (i = 0; i < (face->glyph->bitmap.rows); i++) 182 | for (j = 0; j < face->glyph->bitmap.width; j++) { 183 | color = 184 | *(face->glyph->bitmap.buffer + 185 | face->glyph->bitmap.pitch * i + j); 186 | if (color) { 187 | *(buf + linelength * (i + y) + 188 | (j + x) * 4) = color; 189 | *(buf + linelength * (i + y) + 190 | (j + x) * 4 + 1) = color; 191 | *(buf + linelength * (i + y) + 192 | (j + x) * 4 + 2) = color; 193 | } 194 | } 195 | } 196 | 197 | void draw_text(int x, int y, char *text) 198 | { 199 | while (*text) { 200 | draw_char(x, y, *text); 201 | text++; 202 | x += advance; 203 | } 204 | } 205 | 206 | void draw_key(int x, int y, int w, int h, int color) 207 | { 208 | fill_rect(x + gap, y + gap, w - 2 * gap, 1, BACKLITCOLOR); 209 | fill_rect(x + gap, y + h - gap, w - 2 * gap, 1, BACKLITCOLOR); 210 | fill_rect(x + gap, y + gap, 1, h - 2 * gap, BACKLITCOLOR); 211 | fill_rect(x + w - gap, y + gap, 1, h - 2 * gap, BACKLITCOLOR); 212 | fill_rect(x + gap + 1, y + gap + 1, w - 2 * gap - 2, 213 | h - 2 * gap - 2, color); 214 | } 215 | 216 | void draw_textbutton(int x, int y, int w, int h, int color, char *text) 217 | { 218 | draw_key(x, y, w, h, color); 219 | draw_text(x + gap + 14, y + gap + 24, text); 220 | } 221 | 222 | void draw_button(int x, int y, int w, int h, int color, char chr) 223 | { 224 | draw_key(x, y, w, h, color); 225 | draw_char(x + gap + 7, y + gap + 7, chr); 226 | } 227 | 228 | void draw_keyboard(int row, int pressed) 229 | { 230 | int key; 231 | for (key = 0; key < 7; key++) { 232 | draw_textbutton(key * width / 7 + 1, 1, 233 | width / 7 - 1, height - 1, 234 | (row == 0 235 | && key == 236 | pressed) ? TOUCHCOLOR : 237 | BUTTONCOLOR, 238 | special[layoutuse & 1][key]); 239 | } 240 | for (key = 0; key < 10; key++) { 241 | draw_button(key * width / 10 + 1, height * 1, 242 | width / 10 - 1, height - 1, 243 | (row == 1 244 | && key == 245 | pressed) ? TOUCHCOLOR : BUTTONCOLOR, 246 | layout[layoutuse][key]); 247 | } 248 | for (key = 0; key < 9; key++) { 249 | draw_button(width / 20 + 250 | key * width / 10, height * 2, 251 | width / 10 - 1, height - 1, 252 | (row == 1 253 | && key + 10 == 254 | pressed) ? TOUCHCOLOR : BUTTONCOLOR, 255 | layout[layoutuse][key + 10]); 256 | } 257 | draw_textbutton(1, height * 3, width * 3 / 20 - 1, 258 | height - 1, 259 | (layoutuse & 1) ? TOUCHCOLOR : BUTTONCOLOR, 260 | "Shift"); 261 | for (key = 0; key < 7; key++) { 262 | draw_button(width * 3 / 20 + 263 | key * width / 10, height * 3, 264 | width / 10 - 1, height - 1, 265 | (row == 1 266 | && key + 19 == 267 | pressed) ? TOUCHCOLOR : BUTTONCOLOR, 268 | layout[layoutuse][key + 19]); 269 | } 270 | draw_textbutton(width * 17 / 20, height * 3, 271 | width * 3 / 20 - 1, height - 1, 272 | (row == 3 273 | && 1 == 274 | pressed) ? TOUCHCOLOR : BUTTONCOLOR, 275 | "Bcksp"); 276 | draw_textbutton(1, height * 4, width * 3 / 20 - 1, 277 | height - 1, 278 | (99 == pressed) ? TOUCHCOLOR : BUTTONCOLOR, 279 | (layoutuse & 2) ? "abcABC" : "123!@\""); 280 | draw_textbutton(width * 3 / 20, height * 4, 281 | width / 10 - 1, height - 1, 282 | (altlock) ? TOUCHCOLOR : BUTTONCOLOR, 283 | "Alt"); 284 | draw_button(width / 4, height * 4, width / 2 - 1, 285 | height - 1, (row == 4 286 | && 1 == 287 | pressed) ? TOUCHCOLOR : 288 | BUTTONCOLOR, ' '); 289 | draw_textbutton(width * 3 / 4, height * 4, 290 | width / 10 - 1, height - 1, 291 | (ctrllock) ? TOUCHCOLOR : BUTTONCOLOR, 292 | "Ctrl"); 293 | draw_textbutton(width * 17 / 20, height * 4, 294 | width * 3 / 20 - 1, height - 1, 295 | (row == 4 296 | && 3 == 297 | pressed) ? TOUCHCOLOR : BUTTONCOLOR, 298 | "Enter"); 299 | } 300 | 301 | void show_fbkeyboard(int fbfd) 302 | { 303 | switch (rotate) { 304 | case FB_ROTATE_UR: 305 | lseek(fbfd, fblinelength * (fbheight - height * 5), SEEK_SET); 306 | write(fbfd, buf, buflen); 307 | break; 308 | case FB_ROTATE_UD: 309 | lseek(fbfd, 0, SEEK_SET); 310 | write(fbfd, buf, buflen); 311 | break; 312 | case FB_ROTATE_CW: 313 | for (int i = 0; i < width; i++) { 314 | lseek(fbfd, fblinelength * i, SEEK_SET); 315 | write(fbfd, (int32_t *) (buf + linelength * i), linelength); 316 | } 317 | break; 318 | case FB_ROTATE_CCW: 319 | for (int i = 0; i < width; i++) { 320 | lseek(fbfd, fblinelength * i + (fbwidth - height * 5) * 4, SEEK_SET); 321 | write(fbfd, (int32_t *) (buf + linelength * i), linelength); 322 | } 323 | break; 324 | } 325 | } 326 | 327 | /* 328 | * Waits for a relevant input event. Returns 0 if touched, 1 if released. 329 | */ 330 | int check_input_events(int fdinput, int *x, int *y) 331 | { 332 | int released = 0; 333 | int key = 1; 334 | int absolute_x = -1, absolute_y = -1; 335 | while (!done && !released && (absolute_x == -1 || absolute_y == -1)) 336 | while (read(fdinput, &ie, sizeof(struct input_event)) 337 | && !(ie.type == EV_SYN && ie.code == SYN_REPORT)) { 338 | if (ie.type == EV_ABS) { 339 | switch (ie.code) { 340 | case ABS_MT_POSITION_X: 341 | absolute_x = ie.value; 342 | released = 0; 343 | key = 0; 344 | break; 345 | case ABS_MT_POSITION_Y: 346 | absolute_y = ie.value; 347 | released = 0; 348 | key = 0; 349 | break; 350 | case ABS_MT_TRACKING_ID: 351 | if (ie.value == -1) { 352 | released = 1; 353 | } 354 | break; 355 | } 356 | } 357 | if (ie.type == EV_SYN && ie.code == SYN_MT_REPORT && key) { 358 | released = 1; 359 | } 360 | } 361 | switch (rotate) { 362 | case FB_ROTATE_UR: 363 | *x = absolute_x * 0x10000 / twidth; 364 | *y = absolute_y * 0x10000 / theight; 365 | break; 366 | case FB_ROTATE_UD: 367 | *x = 0x10000 - absolute_x * 0x10000 / twidth; 368 | *y = 0x10000 - absolute_y * 0x10000 / theight; 369 | break; 370 | case FB_ROTATE_CW: 371 | *x = absolute_y * 0x10000 / theight; 372 | *y = 0x10000 - absolute_x * 0x10000 / twidth; 373 | break; 374 | case FB_ROTATE_CCW: 375 | *x = 0x10000 - absolute_y * 0x10000 / theight; 376 | *y = absolute_x * 0x10000 / twidth; 377 | break; 378 | } 379 | return released; 380 | } 381 | 382 | /* 383 | * x, y and trowh are scaled to 2^16 (e.g. min x = 0, max x = 65535) 384 | */ 385 | void identify_touched_key(int x, int y, int *row, int *pressed) 386 | { 387 | switch ((0x10000 - y) / trowh) { 388 | case 4: 389 | *row = 0; // Esc, Tab, F10, etc 390 | *pressed = x * 7 / 0x10000; 391 | break; 392 | case 3: 393 | *row = 1; // q - p 394 | *pressed = x * 10 / 0x10000; 395 | break; 396 | case 2: 397 | *row = 1; // a - l 398 | if (x > 0x10000 / 20 && x < 0x10000 * 19 / 20) 399 | *pressed = 10 + (x * 10 - 0x10000 / 2) / 0x10000; 400 | break; 401 | case 1: 402 | if (x < 0x10000 * 3 / 20) { 403 | *row = 3; 404 | *pressed = 0; // Left Shift 405 | } else if (x < 0x10000 * 17 / 20) { 406 | *row = 1; // z - m 407 | *pressed = 19 + (x * 10 - 0x10000 * 3 / 2) / 0x10000; 408 | } else { 409 | *row = 3; 410 | *pressed = 1; // Bcksp 411 | } 412 | break; 413 | case 0: 414 | *row = 4; 415 | if (x < 0x10000 * 3 / 20) 416 | *pressed = 99; // 123!@ 417 | else if (x < 0x10000 * 5 / 20) 418 | *pressed = 0; // Left Alt 419 | else if (x < 0x10000 * 15 / 20) 420 | *pressed = 1; // Space 421 | else if (x < 0x10000 * 17 / 20) 422 | *pressed = 2; // Right Ctrl 423 | else 424 | *pressed = 3; // Enter 425 | break; 426 | default: 427 | *row = 5; // cursor, Enter, Home, PgDn, etc 428 | *pressed = 3 * y / (0x10000 - trowh * 5); 429 | *pressed *= 3; 430 | *pressed += 3 * x / 0x10000; 431 | break; 432 | } 433 | } 434 | 435 | void send_key(__u16 code) 436 | { 437 | ie.type = EV_KEY; 438 | ie.code = code; 439 | ie.value = 1; 440 | if (write(fduinput, &ie, sizeof(ie)) != sizeof(ie)) 441 | fprintf(stderr, "error: sending uinput event\n"); 442 | ie.value = 0; 443 | if (write(fduinput, &ie, sizeof(ie)) != sizeof(ie)) 444 | fprintf(stderr, "error: sending uinput event\n"); 445 | // ie.code = KEY_RIGHTCTRL; 446 | // if(write(fduinput, &ie, sizeof(ie)) != sizeof(ie)) 447 | // fprintf(stderr, "error: sending uinput event\n"); 448 | ie.type = EV_SYN; 449 | ie.code = SYN_REPORT; 450 | if (write(fduinput, &ie, sizeof(ie)) != sizeof(ie)) 451 | fprintf(stderr, "error: sending uinput event\n"); 452 | } 453 | 454 | void send_uinput_event(int row, int pressed) 455 | { 456 | if (pressed == 99) // second page 457 | layoutuse ^= 2; 458 | else if (row == 1) { // normal keys (abc, 123, !@#) 459 | send_key(keys[row + (layoutuse >> 1)] 460 | [pressed]); 461 | } else if (row == 3 && pressed == 0) { // Left Shift 462 | layoutuse ^= 1; 463 | ie.type = EV_KEY; 464 | ie.code = KEY_LEFTSHIFT; 465 | ie.value = layoutuse & 1; 466 | if (write(fduinput, &ie, sizeof(ie)) != 467 | sizeof(ie)) 468 | fprintf(stderr, 469 | "error sending uinput event\n"); 470 | } else if (row == 4 && pressed == 0) { // Left Alt 471 | altlock ^= 1; 472 | ie.type = EV_KEY; 473 | ie.code = KEY_LEFTALT; 474 | ie.value = altlock; 475 | if (write(fduinput, &ie, sizeof(ie)) != 476 | sizeof(ie)) 477 | fprintf(stderr, 478 | "error sending uinput event\n"); 479 | } else if (row == 4 && pressed == 2) { // Right Ctrl 480 | ctrllock ^= 1; 481 | ie.type = EV_KEY; 482 | ie.code = KEY_RIGHTCTRL; 483 | ie.value = ctrllock; 484 | if (write(fduinput, &ie, sizeof(ie)) != 485 | sizeof(ie)) 486 | fprintf(stderr, 487 | "error sending uinput event\n"); 488 | } else { 489 | send_key(keys[row][pressed]); 490 | } 491 | } 492 | 493 | /* 494 | * return max of rows 495 | */ 496 | int reset_window_size(int fd) 497 | { 498 | struct winsize win = { 0, 0, 0, 0 }; 499 | 500 | if (ioctl(fd, TIOCGWINSZ, &win)) { 501 | if (errno != EINVAL) { 502 | perror("error resetting window size"); 503 | return 0; 504 | } 505 | memset(&win, 0, sizeof(win)); 506 | } 507 | 508 | win.ws_row += 2; 509 | if (!ioctl(fd, TIOCSWINSZ, (char *) &win)) { 510 | do { 511 | win.ws_row *= landscape ? 4 : 3; 512 | win.ws_row /= 2; 513 | } while (!ioctl(fd, TIOCSWINSZ, (char *) &win)); 514 | do { 515 | win.ws_row--; 516 | } while (ioctl(fd, TIOCSWINSZ, (char *) &win)); 517 | } 518 | return win.ws_row; 519 | } 520 | 521 | void set_window_size(int fd) 522 | { 523 | struct winsize win = { 0, 0, 0, 0 }; 524 | int rows; 525 | 526 | rows = reset_window_size(fd); 527 | if (ioctl(fd, TIOCGWINSZ, &win)) { 528 | if (errno != EINVAL) 529 | goto bail; 530 | memset(&win, 0, sizeof(win)); 531 | } 532 | 533 | win.ws_row *= 2; 534 | win.ws_row /= landscape ? 4 : 3; 535 | if (ioctl(fd, TIOCSWINSZ, (char *) &win)) 536 | bail: 537 | perror("error setting window size"); 538 | } 539 | 540 | void term(int signum) 541 | { 542 | done = 1; 543 | } 544 | 545 | int main(int argc, char *argv[]) 546 | { 547 | char *p = NULL; 548 | int fbfd, fdinput, fdcons; 549 | int tty = 0; 550 | int resized[MAX_NR_CONSOLES + 1]; 551 | struct input_absinfo abs_x, abs_y; 552 | FT_Library library; 553 | int x, y, row, pressed = -1, released, key; 554 | 555 | struct sigaction action; 556 | struct vt_stat ttyinfo; 557 | 558 | memset(&resized, 0, sizeof(resized)); 559 | 560 | fdcons = open("/dev/tty0", O_RDWR | O_NOCTTY); 561 | if (fdcons < 0) { 562 | perror("Error opening /dev/tty0"); 563 | exit(-1); 564 | } 565 | 566 | memset(&action, 0, sizeof(action)); 567 | action.sa_handler = term; 568 | sigaction(SIGTERM, &action, NULL); 569 | sigaction(SIGINT, &action, NULL); 570 | 571 | char c; 572 | while ((c = getopt(argc, argv, "d:f:r:h")) != (char) -1) { 573 | switch (c) { 574 | case 'd': 575 | device = optarg; 576 | break; 577 | case 'f': 578 | font = optarg; 579 | break; 580 | case 'r': 581 | errno = 0; 582 | rotate = strtol(optarg, &p, 10) % 4; 583 | if (errno != 0 || p == optarg || p == NULL || *p != '\0') { 584 | printf("Invalid numeric value for -r option\n"); 585 | exit(0); 586 | } 587 | break; 588 | case 'h': 589 | printf("usage: %s [options]\npossible options are:\n -h: print this help\n -d: set path to inputdevice\n -f: set path to font\n -r: set rotation\n", 590 | argv[0]); 591 | exit(0); 592 | break; 593 | case '?': 594 | fprintf(stderr, "unrecognized option -%c\n", 595 | optopt); 596 | break; 597 | } 598 | } 599 | 600 | fbfd = open("/dev/fb0", O_RDWR); 601 | if (fbfd == -1) { 602 | perror("error: opening framebuffer device /dev/fb0"); 603 | exit(-1); 604 | } 605 | if (ioctl(fbfd, FBIOGET_FSCREENINFO, &finfo) == -1) { 606 | perror("error: reading fixed framebuffer information"); 607 | exit(-1); 608 | } 609 | if (ioctl(fbfd, FBIOGET_VSCREENINFO, &vinfo) == -1) { 610 | perror("error: reading variable framebuffer information"); 611 | exit(-1); 612 | } 613 | fbwidth = vinfo.xres; 614 | fbheight = vinfo.yres; 615 | fblinelength = finfo.line_length; 616 | switch (rotate) { 617 | case FB_ROTATE_UR: 618 | case FB_ROTATE_UD: 619 | landscape = fbheight < fbwidth; 620 | width = fbwidth; 621 | height = fbheight / (landscape ? 2 : 3) / 5; // height of one row 622 | trowh = height * 0x10000 / fbheight; 623 | linelength = fblinelength; 624 | buflen = linelength * (height * 5 + 1); 625 | break; 626 | case FB_ROTATE_CW: 627 | case FB_ROTATE_CCW: 628 | landscape = fbheight > fbwidth; 629 | width = fbheight; 630 | height = fbwidth / (landscape ? 2 : 3) / 5; // height of one row 631 | trowh = height * 0x10000 / fbwidth; 632 | linelength = height * 5 * 4; 633 | buflen = width * 4 * (height * 5 + 1); 634 | break; 635 | } 636 | 637 | if (FT_Init_FreeType(&library)) { 638 | perror("error: freetype initialization"); 639 | exit(-1); 640 | } 641 | if (FT_New_Face(library, font, 0, &face)) { 642 | perror("unable to load font file"); 643 | exit(-1); 644 | } 645 | if (FT_Set_Pixel_Sizes(face, height * 1 / 4, height * 1 / 4)) { 646 | perror("FT_Set_Pixel_Sizes failed"); 647 | exit(-1); 648 | } 649 | 650 | if (device) { 651 | if ((fdinput = open(device, O_RDONLY)) == -1) { 652 | perror("failed to open input device node"); 653 | exit(-1); 654 | } 655 | } else { 656 | DIR *inputdevs = opendir("/dev/input"); 657 | struct dirent *dptr; 658 | fdinput = -1; 659 | while ((dptr = readdir(inputdevs))) { 660 | if ((fdinput = 661 | openat(dirfd(inputdevs), dptr->d_name, 662 | O_RDONLY)) != -1 663 | && ioctl(fdinput, EVIOCGBIT(0, sizeof(key)), 664 | &key) != -1 && key >> EV_ABS & 1) 665 | break; 666 | if (fdinput != -1) { 667 | close(fdinput); 668 | fdinput = -1; 669 | } 670 | } 671 | if (fdinput == -1) { 672 | fprintf(stderr, 673 | "no absolute axes device found in /dev/input\n"); 674 | exit(-1); 675 | } 676 | } 677 | if ((ioctl(fdinput, EVIOCGABS(ABS_MT_POSITION_X), &abs_x) == -1) || 678 | (ioctl(fdinput, EVIOCGABS(ABS_MT_POSITION_Y), &abs_y) == -1)) { 679 | perror("error: getting touchscreen size"); 680 | exit(-1); 681 | } 682 | twidth = abs_x.maximum; 683 | theight = abs_y.maximum; 684 | 685 | fduinput = open("/dev/uinput", O_WRONLY); 686 | if (fduinput == -1) { 687 | perror("error: cannot open uinput device /dev/uinput"); 688 | exit(-1); 689 | } 690 | if (ioctl(fduinput, UI_SET_EVBIT, EV_KEY) == -1) { 691 | perror("error: SET_EVBIT EV_KEY"); 692 | exit(-1); 693 | } 694 | if (ioctl(fduinput, UI_SET_EVBIT, EV_SYN) == -1) { 695 | perror("error: SET_EVBIT EV_SYN"); 696 | exit(-1); 697 | } 698 | for (row = 0; row < 6; row++) 699 | for (key = 0; key < sizeof(keys[row]); key++) 700 | ioctl(fduinput, UI_SET_KEYBIT, keys[row][key]); 701 | struct uinput_user_dev uidev; 702 | memset(&uidev, 0, sizeof(uidev)); 703 | snprintf(uidev.name, UINPUT_MAX_NAME_SIZE, "fbkeyboard"); 704 | uidev.id.bustype = BUS_USB; 705 | uidev.id.vendor = 1; 706 | uidev.id.product = 1; 707 | uidev.id.version = 1; 708 | if (write(fduinput, &uidev, sizeof(uidev)) != sizeof(uidev)) { 709 | fprintf(stderr, "error setting up uinput\n"); 710 | exit(-1); 711 | } 712 | if (ioctl(fduinput, UI_DEV_CREATE) == -1) { 713 | perror("error creating uinput dev"); 714 | exit(-1); 715 | } 716 | 717 | buf = malloc(buflen); 718 | if (buf == 0) { 719 | perror("malloc failed"); 720 | exit(-1); 721 | } 722 | fill_rect(0, 0, width - 1, height * 5, TERMCOLOR); 723 | 724 | 725 | while (!done) { 726 | if (!ioctl(fdcons, VT_GETSTATE, &ttyinfo)) { 727 | if (tty != ttyinfo.v_active) { 728 | tty = ttyinfo.v_active; 729 | close(fdcons); 730 | fdcons = open("/dev/tty0", O_RDWR | O_NOCTTY); 731 | set_window_size(fdcons); 732 | resized[tty] = 1; 733 | } 734 | } else { 735 | perror("VT_GETSTATE ioctl failed"); 736 | } 737 | 738 | draw_keyboard(row, pressed); 739 | show_fbkeyboard(fbfd); 740 | 741 | released = check_input_events(fdinput, &x, &y); 742 | if (released && pressed != -1) 743 | send_uinput_event(row, pressed); 744 | 745 | pressed = -1; 746 | if (!released) 747 | identify_touched_key(x, y, &row, &pressed); 748 | } 749 | 750 | int i; 751 | char buf[12]; 752 | for (i = 1; i <= MAX_NR_CONSOLES; i++) { 753 | snprintf(buf, 12, "/dev/tty%d", i); 754 | if (resized[i]) { 755 | close(fdcons); 756 | fdcons = open(buf, O_RDWR | O_NOCTTY); 757 | if (fdcons < 0) { 758 | perror("Error opening /dev/tty[i]"); 759 | exit(-1); 760 | } 761 | reset_window_size(fdcons); 762 | } 763 | } 764 | } 765 | --------------------------------------------------------------------------------