1 /* 2 * QEMU VNC display driver 3 * 4 * Copyright (C) 2006 Anthony Liguori <anthony@codemonkey.ws> 5 * Copyright (C) 2006 Fabrice Bellard 6 * Copyright (C) 2009 Red Hat, Inc 7 * 8 * Permission is hereby granted, free of charge, to any person obtaining a copy 9 * of this software and associated documentation files (the "Software"), to deal 10 * in the Software without restriction, including without limitation the rights 11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 12 * copies of the Software, and to permit persons to whom the Software is 13 * furnished to do so, subject to the following conditions: 14 * 15 * The above copyright notice and this permission notice shall be included in 16 * all copies or substantial portions of the Software. 17 * 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 21 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 24 * THE SOFTWARE. 25 */ 26 27 #ifndef __QEMU_VNC_H 28 #define __QEMU_VNC_H 29 30 #include "qemu-common.h" 31 #include "qemu/queue.h" 32 #include "qemu/thread.h" 33 #include "ui/console.h" 34 #include "monitor/monitor.h" 35 #include "audio/audio.h" 36 #include "qemu/bitmap.h" 37 #include <zlib.h> 38 #include <stdbool.h> 39 40 #include "keymaps.h" 41 #include "vnc-palette.h" 42 #include "vnc-enc-zrle.h" 43 44 // #define _VNC_DEBUG 1 45 46 #ifdef _VNC_DEBUG 47 #define VNC_DEBUG(fmt, ...) do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) 48 #else 49 #define VNC_DEBUG(fmt, ...) do { } while (0) 50 #endif 51 52 /***************************************************************************** 53 * 54 * Core data structures 55 * 56 *****************************************************************************/ 57 58 typedef struct Buffer 59 { 60 size_t capacity; 61 size_t offset; 62 uint8_t *buffer; 63 } Buffer; 64 65 typedef struct VncState VncState; 66 typedef struct VncJob VncJob; 67 typedef struct VncRect VncRect; 68 typedef struct VncRectEntry VncRectEntry; 69 70 typedef int VncReadEvent(VncState *vs, uint8_t *data, size_t len); 71 72 typedef void VncWritePixels(VncState *vs, void *data, int size); 73 74 typedef void VncSendHextileTile(VncState *vs, 75 int x, int y, int w, int h, 76 void *last_bg, 77 void *last_fg, 78 int *has_bg, int *has_fg); 79 80 /* VNC_MAX_WIDTH must be a multiple of 16. */ 81 #define VNC_MAX_WIDTH 2560 82 #define VNC_MAX_HEIGHT 2048 83 84 /* VNC_DIRTY_PIXELS_PER_BIT is the number of dirty pixels represented 85 * by one bit in the dirty bitmap */ 86 #define VNC_DIRTY_PIXELS_PER_BIT 16 87 88 /* VNC_DIRTY_BITS is the number of bits in the dirty bitmap. */ 89 #define VNC_DIRTY_BITS (VNC_MAX_WIDTH / VNC_DIRTY_PIXELS_PER_BIT) 90 91 /* VNC_DIRTY_BPL (BPL = bits per line) might be greater than 92 * VNC_DIRTY_BITS due to alignment */ 93 #define VNC_DIRTY_BPL(x) (sizeof((x)->dirty) / VNC_MAX_HEIGHT * BITS_PER_BYTE) 94 95 #define VNC_STAT_RECT 64 96 #define VNC_STAT_COLS (VNC_MAX_WIDTH / VNC_STAT_RECT) 97 #define VNC_STAT_ROWS (VNC_MAX_HEIGHT / VNC_STAT_RECT) 98 99 #define VNC_AUTH_CHALLENGE_SIZE 16 100 101 typedef struct VncDisplay VncDisplay; 102 103 #ifdef CONFIG_VNC_TLS 104 #include "vnc-tls.h" 105 #include "vnc-auth-vencrypt.h" 106 #endif 107 #ifdef CONFIG_VNC_SASL 108 #include "vnc-auth-sasl.h" 109 #endif 110 #ifdef CONFIG_VNC_WS 111 #include "vnc-ws.h" 112 #endif 113 114 struct VncRectStat 115 { 116 /* time of last 10 updates, to find update frequency */ 117 struct timeval times[10]; 118 int idx; 119 120 double freq; /* Update frequency (in Hz) */ 121 bool updated; /* Already updated during this refresh */ 122 }; 123 124 typedef struct VncRectStat VncRectStat; 125 126 struct VncSurface 127 { 128 struct timeval last_freq_check; 129 DECLARE_BITMAP(dirty[VNC_MAX_HEIGHT], VNC_MAX_WIDTH / 16); 130 VncRectStat stats[VNC_STAT_ROWS][VNC_STAT_COLS]; 131 pixman_image_t *fb; 132 pixman_format_code_t format; 133 }; 134 135 typedef enum VncShareMode { 136 VNC_SHARE_MODE_CONNECTING = 1, 137 VNC_SHARE_MODE_SHARED, 138 VNC_SHARE_MODE_EXCLUSIVE, 139 VNC_SHARE_MODE_DISCONNECTED, 140 } VncShareMode; 141 142 typedef enum VncSharePolicy { 143 VNC_SHARE_POLICY_IGNORE = 1, 144 VNC_SHARE_POLICY_ALLOW_EXCLUSIVE, 145 VNC_SHARE_POLICY_FORCE_SHARED, 146 } VncSharePolicy; 147 148 struct VncDisplay 149 { 150 QTAILQ_HEAD(, VncState) clients; 151 int num_exclusive; 152 VncSharePolicy share_policy; 153 int lsock; 154 #ifdef CONFIG_VNC_WS 155 int lwebsock; 156 bool websocket; 157 char *ws_display; 158 #endif 159 DisplaySurface *ds; 160 DisplayChangeListener dcl; 161 kbd_layout_t *kbd_layout; 162 int lock_key_sync; 163 QemuMutex mutex; 164 165 QEMUCursor *cursor; 166 int cursor_msize; 167 uint8_t *cursor_mask; 168 169 struct VncSurface guest; /* guest visible surface (aka ds->surface) */ 170 pixman_image_t *server; /* vnc server surface */ 171 172 char *display; 173 char *password; 174 time_t expires; 175 int auth; 176 bool lossy; 177 bool non_adaptive; 178 #ifdef CONFIG_VNC_TLS 179 int subauth; /* Used by VeNCrypt */ 180 VncDisplayTLS tls; 181 #endif 182 #ifdef CONFIG_VNC_SASL 183 VncDisplaySASL sasl; 184 #endif 185 }; 186 187 typedef struct VncTight { 188 int type; 189 uint8_t quality; 190 uint8_t compression; 191 uint8_t pixel24; 192 Buffer tight; 193 Buffer tmp; 194 Buffer zlib; 195 Buffer gradient; 196 #ifdef CONFIG_VNC_JPEG 197 Buffer jpeg; 198 #endif 199 #ifdef CONFIG_VNC_PNG 200 Buffer png; 201 #endif 202 int levels[4]; 203 z_stream stream[4]; 204 } VncTight; 205 206 typedef struct VncHextile { 207 VncSendHextileTile *send_tile; 208 } VncHextile; 209 210 typedef struct VncZlib { 211 Buffer zlib; 212 Buffer tmp; 213 z_stream stream; 214 int level; 215 } VncZlib; 216 217 typedef struct VncZrle { 218 int type; 219 Buffer fb; 220 Buffer zrle; 221 Buffer tmp; 222 Buffer zlib; 223 z_stream stream; 224 VncPalette palette; 225 } VncZrle; 226 227 typedef struct VncZywrle { 228 int buf[VNC_ZRLE_TILE_WIDTH * VNC_ZRLE_TILE_HEIGHT]; 229 } VncZywrle; 230 231 struct VncRect 232 { 233 int x; 234 int y; 235 int w; 236 int h; 237 }; 238 239 struct VncRectEntry 240 { 241 struct VncRect rect; 242 QLIST_ENTRY(VncRectEntry) next; 243 }; 244 245 struct VncJob 246 { 247 VncState *vs; 248 249 QLIST_HEAD(, VncRectEntry) rectangles; 250 QTAILQ_ENTRY(VncJob) next; 251 }; 252 253 struct VncState 254 { 255 int csock; 256 257 DECLARE_BITMAP(dirty[VNC_MAX_HEIGHT], VNC_DIRTY_BITS); 258 uint8_t **lossy_rect; /* Not an Array to avoid costly memcpy in 259 * vnc-jobs-async.c */ 260 261 VncDisplay *vd; 262 int need_update; 263 int force_update; 264 uint32_t features; 265 int absolute; 266 int last_x; 267 int last_y; 268 uint32_t last_bmask; 269 int client_width; 270 int client_height; 271 VncShareMode share_mode; 272 273 uint32_t vnc_encoding; 274 275 int major; 276 int minor; 277 278 int auth; 279 char challenge[VNC_AUTH_CHALLENGE_SIZE]; 280 #ifdef CONFIG_VNC_TLS 281 int subauth; /* Used by VeNCrypt */ 282 VncStateTLS tls; 283 #endif 284 #ifdef CONFIG_VNC_SASL 285 VncStateSASL sasl; 286 #endif 287 #ifdef CONFIG_VNC_WS 288 #ifdef CONFIG_VNC_TLS 289 VncStateTLS ws_tls; 290 #endif /* CONFIG_VNC_TLS */ 291 bool encode_ws; 292 bool websocket; 293 #endif /* CONFIG_VNC_WS */ 294 295 QObject *info; 296 297 Buffer output; 298 Buffer input; 299 #ifdef CONFIG_VNC_WS 300 Buffer ws_input; 301 Buffer ws_output; 302 #endif 303 /* current output mode information */ 304 VncWritePixels *write_pixels; 305 PixelFormat client_pf; 306 pixman_format_code_t client_format; 307 bool client_be; 308 309 CaptureVoiceOut *audio_cap; 310 struct audsettings as; 311 312 VncReadEvent *read_handler; 313 size_t read_handler_expect; 314 /* input */ 315 uint8_t modifiers_state[256]; 316 QEMUPutLEDEntry *led; 317 318 bool abort; 319 bool initialized; 320 QemuMutex output_mutex; 321 QEMUBH *bh; 322 Buffer jobs_buffer; 323 324 /* Encoding specific, if you add something here, don't forget to 325 * update vnc_async_encoding_start() 326 */ 327 VncTight tight; 328 VncZlib zlib; 329 VncHextile hextile; 330 VncZrle zrle; 331 VncZywrle zywrle; 332 333 Notifier mouse_mode_notifier; 334 335 QTAILQ_ENTRY(VncState) next; 336 }; 337 338 339 /***************************************************************************** 340 * 341 * Authentication modes 342 * 343 *****************************************************************************/ 344 345 enum { 346 VNC_AUTH_INVALID = 0, 347 VNC_AUTH_NONE = 1, 348 VNC_AUTH_VNC = 2, 349 VNC_AUTH_RA2 = 5, 350 VNC_AUTH_RA2NE = 6, 351 VNC_AUTH_TIGHT = 16, 352 VNC_AUTH_ULTRA = 17, 353 VNC_AUTH_TLS = 18, /* Supported in GTK-VNC & VINO */ 354 VNC_AUTH_VENCRYPT = 19, /* Supported in GTK-VNC & VeNCrypt */ 355 VNC_AUTH_SASL = 20, /* Supported in GTK-VNC & VINO */ 356 }; 357 358 enum { 359 VNC_AUTH_VENCRYPT_PLAIN = 256, 360 VNC_AUTH_VENCRYPT_TLSNONE = 257, 361 VNC_AUTH_VENCRYPT_TLSVNC = 258, 362 VNC_AUTH_VENCRYPT_TLSPLAIN = 259, 363 VNC_AUTH_VENCRYPT_X509NONE = 260, 364 VNC_AUTH_VENCRYPT_X509VNC = 261, 365 VNC_AUTH_VENCRYPT_X509PLAIN = 262, 366 VNC_AUTH_VENCRYPT_X509SASL = 263, 367 VNC_AUTH_VENCRYPT_TLSSASL = 264, 368 }; 369 370 371 /***************************************************************************** 372 * 373 * Encoding types 374 * 375 *****************************************************************************/ 376 377 #define VNC_ENCODING_RAW 0x00000000 378 #define VNC_ENCODING_COPYRECT 0x00000001 379 #define VNC_ENCODING_RRE 0x00000002 380 #define VNC_ENCODING_CORRE 0x00000004 381 #define VNC_ENCODING_HEXTILE 0x00000005 382 #define VNC_ENCODING_ZLIB 0x00000006 383 #define VNC_ENCODING_TIGHT 0x00000007 384 #define VNC_ENCODING_ZLIBHEX 0x00000008 385 #define VNC_ENCODING_TRLE 0x0000000f 386 #define VNC_ENCODING_ZRLE 0x00000010 387 #define VNC_ENCODING_ZYWRLE 0x00000011 388 #define VNC_ENCODING_COMPRESSLEVEL0 0xFFFFFF00 /* -256 */ 389 #define VNC_ENCODING_QUALITYLEVEL0 0xFFFFFFE0 /* -32 */ 390 #define VNC_ENCODING_XCURSOR 0xFFFFFF10 /* -240 */ 391 #define VNC_ENCODING_RICH_CURSOR 0xFFFFFF11 /* -239 */ 392 #define VNC_ENCODING_POINTER_POS 0xFFFFFF18 /* -232 */ 393 #define VNC_ENCODING_LASTRECT 0xFFFFFF20 /* -224 */ 394 #define VNC_ENCODING_DESKTOPRESIZE 0xFFFFFF21 /* -223 */ 395 #define VNC_ENCODING_POINTER_TYPE_CHANGE 0XFFFFFEFF /* -257 */ 396 #define VNC_ENCODING_EXT_KEY_EVENT 0XFFFFFEFE /* -258 */ 397 #define VNC_ENCODING_AUDIO 0XFFFFFEFD /* -259 */ 398 #define VNC_ENCODING_TIGHT_PNG 0xFFFFFEFC /* -260 */ 399 #define VNC_ENCODING_LED_STATE 0XFFFFFEFB /* -261 */ 400 #define VNC_ENCODING_WMVi 0x574D5669 401 402 /***************************************************************************** 403 * 404 * Other tight constants 405 * 406 *****************************************************************************/ 407 408 /* 409 * Vendors known by TightVNC: standard VNC/RealVNC, TridiaVNC, and TightVNC. 410 */ 411 412 #define VNC_TIGHT_CCB_RESET_MASK (0x0f) 413 #define VNC_TIGHT_CCB_TYPE_MASK (0x0f << 4) 414 #define VNC_TIGHT_CCB_TYPE_FILL (0x08 << 4) 415 #define VNC_TIGHT_CCB_TYPE_JPEG (0x09 << 4) 416 #define VNC_TIGHT_CCB_TYPE_PNG (0x0A << 4) 417 #define VNC_TIGHT_CCB_BASIC_MAX (0x07 << 4) 418 #define VNC_TIGHT_CCB_BASIC_ZLIB (0x03 << 4) 419 #define VNC_TIGHT_CCB_BASIC_FILTER (0x04 << 4) 420 421 /***************************************************************************** 422 * 423 * Features 424 * 425 *****************************************************************************/ 426 427 #define VNC_FEATURE_RESIZE 0 428 #define VNC_FEATURE_HEXTILE 1 429 #define VNC_FEATURE_POINTER_TYPE_CHANGE 2 430 #define VNC_FEATURE_WMVI 3 431 #define VNC_FEATURE_TIGHT 4 432 #define VNC_FEATURE_ZLIB 5 433 #define VNC_FEATURE_COPYRECT 6 434 #define VNC_FEATURE_RICH_CURSOR 7 435 #define VNC_FEATURE_TIGHT_PNG 8 436 #define VNC_FEATURE_ZRLE 9 437 #define VNC_FEATURE_ZYWRLE 10 438 #define VNC_FEATURE_LED_STATE 11 439 440 #define VNC_FEATURE_RESIZE_MASK (1 << VNC_FEATURE_RESIZE) 441 #define VNC_FEATURE_HEXTILE_MASK (1 << VNC_FEATURE_HEXTILE) 442 #define VNC_FEATURE_POINTER_TYPE_CHANGE_MASK (1 << VNC_FEATURE_POINTER_TYPE_CHANGE) 443 #define VNC_FEATURE_WMVI_MASK (1 << VNC_FEATURE_WMVI) 444 #define VNC_FEATURE_TIGHT_MASK (1 << VNC_FEATURE_TIGHT) 445 #define VNC_FEATURE_ZLIB_MASK (1 << VNC_FEATURE_ZLIB) 446 #define VNC_FEATURE_COPYRECT_MASK (1 << VNC_FEATURE_COPYRECT) 447 #define VNC_FEATURE_RICH_CURSOR_MASK (1 << VNC_FEATURE_RICH_CURSOR) 448 #define VNC_FEATURE_TIGHT_PNG_MASK (1 << VNC_FEATURE_TIGHT_PNG) 449 #define VNC_FEATURE_ZRLE_MASK (1 << VNC_FEATURE_ZRLE) 450 #define VNC_FEATURE_ZYWRLE_MASK (1 << VNC_FEATURE_ZYWRLE) 451 #define VNC_FEATURE_LED_STATE_MASK (1 << VNC_FEATURE_LED_STATE) 452 453 454 /* Client -> Server message IDs */ 455 #define VNC_MSG_CLIENT_SET_PIXEL_FORMAT 0 456 #define VNC_MSG_CLIENT_SET_ENCODINGS 2 457 #define VNC_MSG_CLIENT_FRAMEBUFFER_UPDATE_REQUEST 3 458 #define VNC_MSG_CLIENT_KEY_EVENT 4 459 #define VNC_MSG_CLIENT_POINTER_EVENT 5 460 #define VNC_MSG_CLIENT_CUT_TEXT 6 461 #define VNC_MSG_CLIENT_VMWARE_0 127 462 #define VNC_MSG_CLIENT_CALL_CONTROL 249 463 #define VNC_MSG_CLIENT_XVP 250 464 #define VNC_MSG_CLIENT_SET_DESKTOP_SIZE 251 465 #define VNC_MSG_CLIENT_TIGHT 252 466 #define VNC_MSG_CLIENT_GII 253 467 #define VNC_MSG_CLIENT_VMWARE_1 254 468 #define VNC_MSG_CLIENT_QEMU 255 469 470 /* Server -> Client message IDs */ 471 #define VNC_MSG_SERVER_FRAMEBUFFER_UPDATE 0 472 #define VNC_MSG_SERVER_SET_COLOUR_MAP_ENTRIES 1 473 #define VNC_MSG_SERVER_BELL 2 474 #define VNC_MSG_SERVER_CUT_TEXT 3 475 #define VNC_MSG_SERVER_VMWARE_0 127 476 #define VNC_MSG_SERVER_CALL_CONTROL 249 477 #define VNC_MSG_SERVER_XVP 250 478 #define VNC_MSG_SERVER_TIGHT 252 479 #define VNC_MSG_SERVER_GII 253 480 #define VNC_MSG_SERVER_VMWARE_1 254 481 #define VNC_MSG_SERVER_QEMU 255 482 483 484 485 /* QEMU client -> server message IDs */ 486 #define VNC_MSG_CLIENT_QEMU_EXT_KEY_EVENT 0 487 #define VNC_MSG_CLIENT_QEMU_AUDIO 1 488 489 /* QEMU server -> client message IDs */ 490 #define VNC_MSG_SERVER_QEMU_AUDIO 1 491 492 493 494 /* QEMU client -> server audio message IDs */ 495 #define VNC_MSG_CLIENT_QEMU_AUDIO_ENABLE 0 496 #define VNC_MSG_CLIENT_QEMU_AUDIO_DISABLE 1 497 #define VNC_MSG_CLIENT_QEMU_AUDIO_SET_FORMAT 2 498 499 /* QEMU server -> client audio message IDs */ 500 #define VNC_MSG_SERVER_QEMU_AUDIO_END 0 501 #define VNC_MSG_SERVER_QEMU_AUDIO_BEGIN 1 502 #define VNC_MSG_SERVER_QEMU_AUDIO_DATA 2 503 504 505 /***************************************************************************** 506 * 507 * Internal APIs 508 * 509 *****************************************************************************/ 510 511 /* Event loop functions */ 512 void vnc_client_read(void *opaque); 513 void vnc_client_write(void *opaque); 514 515 long vnc_client_read_buf(VncState *vs, uint8_t *data, size_t datalen); 516 long vnc_client_write_buf(VncState *vs, const uint8_t *data, size_t datalen); 517 518 /* Protocol I/O functions */ 519 void vnc_write(VncState *vs, const void *data, size_t len); 520 void vnc_write_u32(VncState *vs, uint32_t value); 521 void vnc_write_s32(VncState *vs, int32_t value); 522 void vnc_write_u16(VncState *vs, uint16_t value); 523 void vnc_write_u8(VncState *vs, uint8_t value); 524 void vnc_flush(VncState *vs); 525 void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting); 526 void vnc_disconnect_finish(VncState *vs); 527 void vnc_init_state(VncState *vs); 528 529 530 /* Buffer I/O functions */ 531 uint32_t read_u32(uint8_t *data, size_t offset); 532 533 /* Protocol stage functions */ 534 void vnc_client_error(VncState *vs); 535 int vnc_client_io_error(VncState *vs, int ret, int last_errno); 536 537 void start_client_init(VncState *vs); 538 void start_auth_vnc(VncState *vs); 539 540 /* Buffer management */ 541 void buffer_reserve(Buffer *buffer, size_t len); 542 void buffer_reset(Buffer *buffer); 543 void buffer_free(Buffer *buffer); 544 void buffer_append(Buffer *buffer, const void *data, size_t len); 545 void buffer_advance(Buffer *buf, size_t len); 546 uint8_t *buffer_end(Buffer *buffer); 547 548 549 /* Misc helpers */ 550 551 char *vnc_socket_local_addr(const char *format, int fd); 552 char *vnc_socket_remote_addr(const char *format, int fd); 553 554 static inline uint32_t vnc_has_feature(VncState *vs, int feature) { 555 return (vs->features & (1 << feature)); 556 } 557 558 /* Framebuffer */ 559 void vnc_framebuffer_update(VncState *vs, int x, int y, int w, int h, 560 int32_t encoding); 561 562 /* server fb is in PIXMAN_x8r8g8b8 */ 563 #define VNC_SERVER_FB_FORMAT PIXMAN_FORMAT(32, PIXMAN_TYPE_ARGB, 0, 8, 8, 8) 564 #define VNC_SERVER_FB_BITS (PIXMAN_FORMAT_BPP(VNC_SERVER_FB_FORMAT)) 565 #define VNC_SERVER_FB_BYTES ((VNC_SERVER_FB_BITS+7)/8) 566 567 void *vnc_server_fb_ptr(VncDisplay *vd, int x, int y); 568 int vnc_server_fb_stride(VncDisplay *vd); 569 570 void vnc_convert_pixel(VncState *vs, uint8_t *buf, uint32_t v); 571 double vnc_update_freq(VncState *vs, int x, int y, int w, int h); 572 void vnc_sent_lossy_rect(VncState *vs, int x, int y, int w, int h); 573 574 /* Encodings */ 575 int vnc_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); 576 577 int vnc_raw_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); 578 579 int vnc_hextile_send_framebuffer_update(VncState *vs, int x, 580 int y, int w, int h); 581 void vnc_hextile_set_pixel_conversion(VncState *vs, int generic); 582 583 void *vnc_zlib_zalloc(void *x, unsigned items, unsigned size); 584 void vnc_zlib_zfree(void *x, void *addr); 585 int vnc_zlib_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); 586 void vnc_zlib_clear(VncState *vs); 587 588 int vnc_tight_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); 589 int vnc_tight_png_send_framebuffer_update(VncState *vs, int x, int y, 590 int w, int h); 591 void vnc_tight_clear(VncState *vs); 592 593 int vnc_zrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); 594 int vnc_zywrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); 595 void vnc_zrle_clear(VncState *vs); 596 597 #endif /* __QEMU_VNC_H */ 598