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