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 <zlib.h> 37 #include <stdbool.h> 38 39 #include "keymaps.h" 40 #include "vnc-palette.h" 41 #include "vnc-enc-zrle.h" 42 #include "qapi-types.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_DIRTY_PIXELS_PER_BIT is the number of dirty pixels represented 81 * by one bit in the dirty bitmap, should be a power of 2 */ 82 #define VNC_DIRTY_PIXELS_PER_BIT 16 83 84 /* VNC_MAX_WIDTH must be a multiple of VNC_DIRTY_PIXELS_PER_BIT. */ 85 86 #define VNC_MAX_WIDTH ROUND_UP(2560, VNC_DIRTY_PIXELS_PER_BIT) 87 #define VNC_MAX_HEIGHT 2048 88 89 /* VNC_DIRTY_BITS is the number of bits in the dirty bitmap. */ 90 #define VNC_DIRTY_BITS (VNC_MAX_WIDTH / VNC_DIRTY_PIXELS_PER_BIT) 91 92 /* VNC_DIRTY_BPL (BPL = bits per line) might be greater than 93 * VNC_DIRTY_BITS due to alignment */ 94 #define VNC_DIRTY_BPL(x) (sizeof((x)->dirty) / VNC_MAX_HEIGHT * BITS_PER_BYTE) 95 96 #define VNC_STAT_RECT 64 97 #define VNC_STAT_COLS (VNC_MAX_WIDTH / VNC_STAT_RECT) 98 #define VNC_STAT_ROWS (VNC_MAX_HEIGHT / VNC_STAT_RECT) 99 100 #define VNC_AUTH_CHALLENGE_SIZE 16 101 102 typedef struct VncDisplay VncDisplay; 103 104 #ifdef CONFIG_VNC_TLS 105 #include "vnc-tls.h" 106 #include "vnc-auth-vencrypt.h" 107 #endif 108 #ifdef CONFIG_VNC_SASL 109 #include "vnc-auth-sasl.h" 110 #endif 111 #ifdef CONFIG_VNC_WS 112 #include "vnc-ws.h" 113 #endif 114 115 struct VncRectStat 116 { 117 /* time of last 10 updates, to find update frequency */ 118 struct timeval times[10]; 119 int idx; 120 121 double freq; /* Update frequency (in Hz) */ 122 bool updated; /* Already updated during this refresh */ 123 }; 124 125 typedef struct VncRectStat VncRectStat; 126 127 struct VncSurface 128 { 129 struct timeval last_freq_check; 130 DECLARE_BITMAP(dirty[VNC_MAX_HEIGHT], 131 VNC_MAX_WIDTH / VNC_DIRTY_PIXELS_PER_BIT); 132 VncRectStat stats[VNC_STAT_ROWS][VNC_STAT_COLS]; 133 pixman_image_t *fb; 134 pixman_format_code_t format; 135 }; 136 137 typedef enum VncShareMode { 138 VNC_SHARE_MODE_CONNECTING = 1, 139 VNC_SHARE_MODE_SHARED, 140 VNC_SHARE_MODE_EXCLUSIVE, 141 VNC_SHARE_MODE_DISCONNECTED, 142 } VncShareMode; 143 144 typedef enum VncSharePolicy { 145 VNC_SHARE_POLICY_IGNORE = 1, 146 VNC_SHARE_POLICY_ALLOW_EXCLUSIVE, 147 VNC_SHARE_POLICY_FORCE_SHARED, 148 } VncSharePolicy; 149 150 struct VncDisplay 151 { 152 QTAILQ_HEAD(, VncState) clients; 153 int num_exclusive; 154 VncSharePolicy share_policy; 155 int lsock; 156 #ifdef CONFIG_VNC_WS 157 int lwebsock; 158 bool websocket; 159 char *ws_display; 160 #endif 161 DisplaySurface *ds; 162 DisplayChangeListener dcl; 163 kbd_layout_t *kbd_layout; 164 int lock_key_sync; 165 QemuMutex mutex; 166 167 QEMUCursor *cursor; 168 int cursor_msize; 169 uint8_t *cursor_mask; 170 171 struct VncSurface guest; /* guest visible surface (aka ds->surface) */ 172 pixman_image_t *server; /* vnc server surface */ 173 174 char *display; 175 char *password; 176 time_t expires; 177 int auth; 178 bool lossy; 179 bool non_adaptive; 180 #ifdef CONFIG_VNC_TLS 181 int subauth; /* Used by VeNCrypt */ 182 VncDisplayTLS tls; 183 #endif 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 uint32_t features; 267 int absolute; 268 int last_x; 269 int last_y; 270 uint32_t last_bmask; 271 int client_width; 272 int client_height; 273 VncShareMode share_mode; 274 275 uint32_t vnc_encoding; 276 277 int major; 278 int minor; 279 280 int auth; 281 char challenge[VNC_AUTH_CHALLENGE_SIZE]; 282 #ifdef CONFIG_VNC_TLS 283 int subauth; /* Used by VeNCrypt */ 284 VncStateTLS tls; 285 #endif 286 #ifdef CONFIG_VNC_SASL 287 VncStateSASL sasl; 288 #endif 289 #ifdef CONFIG_VNC_WS 290 #ifdef CONFIG_VNC_TLS 291 VncStateTLS ws_tls; 292 #endif /* CONFIG_VNC_TLS */ 293 bool encode_ws; 294 bool websocket; 295 #endif /* CONFIG_VNC_WS */ 296 297 VncClientInfo *info; 298 299 Buffer output; 300 Buffer input; 301 #ifdef CONFIG_VNC_WS 302 Buffer ws_input; 303 Buffer ws_output; 304 #endif 305 /* current output mode information */ 306 VncWritePixels *write_pixels; 307 PixelFormat client_pf; 308 pixman_format_code_t client_format; 309 bool client_be; 310 311 CaptureVoiceOut *audio_cap; 312 struct audsettings as; 313 314 VncReadEvent *read_handler; 315 size_t read_handler_expect; 316 /* input */ 317 uint8_t modifiers_state[256]; 318 QEMUPutLEDEntry *led; 319 320 bool abort; 321 bool initialized; 322 QemuMutex output_mutex; 323 QEMUBH *bh; 324 Buffer jobs_buffer; 325 326 /* Encoding specific, if you add something here, don't forget to 327 * update vnc_async_encoding_start() 328 */ 329 VncTight tight; 330 VncZlib zlib; 331 VncHextile hextile; 332 VncZrle zrle; 333 VncZywrle zywrle; 334 335 Notifier mouse_mode_notifier; 336 337 QTAILQ_ENTRY(VncState) next; 338 }; 339 340 341 /***************************************************************************** 342 * 343 * Authentication modes 344 * 345 *****************************************************************************/ 346 347 enum { 348 VNC_AUTH_INVALID = 0, 349 VNC_AUTH_NONE = 1, 350 VNC_AUTH_VNC = 2, 351 VNC_AUTH_RA2 = 5, 352 VNC_AUTH_RA2NE = 6, 353 VNC_AUTH_TIGHT = 16, 354 VNC_AUTH_ULTRA = 17, 355 VNC_AUTH_TLS = 18, /* Supported in GTK-VNC & VINO */ 356 VNC_AUTH_VENCRYPT = 19, /* Supported in GTK-VNC & VeNCrypt */ 357 VNC_AUTH_SASL = 20, /* Supported in GTK-VNC & VINO */ 358 }; 359 360 enum { 361 VNC_AUTH_VENCRYPT_PLAIN = 256, 362 VNC_AUTH_VENCRYPT_TLSNONE = 257, 363 VNC_AUTH_VENCRYPT_TLSVNC = 258, 364 VNC_AUTH_VENCRYPT_TLSPLAIN = 259, 365 VNC_AUTH_VENCRYPT_X509NONE = 260, 366 VNC_AUTH_VENCRYPT_X509VNC = 261, 367 VNC_AUTH_VENCRYPT_X509PLAIN = 262, 368 VNC_AUTH_VENCRYPT_X509SASL = 263, 369 VNC_AUTH_VENCRYPT_TLSSASL = 264, 370 }; 371 372 373 /***************************************************************************** 374 * 375 * Encoding types 376 * 377 *****************************************************************************/ 378 379 #define VNC_ENCODING_RAW 0x00000000 380 #define VNC_ENCODING_COPYRECT 0x00000001 381 #define VNC_ENCODING_RRE 0x00000002 382 #define VNC_ENCODING_CORRE 0x00000004 383 #define VNC_ENCODING_HEXTILE 0x00000005 384 #define VNC_ENCODING_ZLIB 0x00000006 385 #define VNC_ENCODING_TIGHT 0x00000007 386 #define VNC_ENCODING_ZLIBHEX 0x00000008 387 #define VNC_ENCODING_TRLE 0x0000000f 388 #define VNC_ENCODING_ZRLE 0x00000010 389 #define VNC_ENCODING_ZYWRLE 0x00000011 390 #define VNC_ENCODING_COMPRESSLEVEL0 0xFFFFFF00 /* -256 */ 391 #define VNC_ENCODING_QUALITYLEVEL0 0xFFFFFFE0 /* -32 */ 392 #define VNC_ENCODING_XCURSOR 0xFFFFFF10 /* -240 */ 393 #define VNC_ENCODING_RICH_CURSOR 0xFFFFFF11 /* -239 */ 394 #define VNC_ENCODING_POINTER_POS 0xFFFFFF18 /* -232 */ 395 #define VNC_ENCODING_LASTRECT 0xFFFFFF20 /* -224 */ 396 #define VNC_ENCODING_DESKTOPRESIZE 0xFFFFFF21 /* -223 */ 397 #define VNC_ENCODING_POINTER_TYPE_CHANGE 0XFFFFFEFF /* -257 */ 398 #define VNC_ENCODING_EXT_KEY_EVENT 0XFFFFFEFE /* -258 */ 399 #define VNC_ENCODING_AUDIO 0XFFFFFEFD /* -259 */ 400 #define VNC_ENCODING_TIGHT_PNG 0xFFFFFEFC /* -260 */ 401 #define VNC_ENCODING_LED_STATE 0XFFFFFEFB /* -261 */ 402 #define VNC_ENCODING_WMVi 0x574D5669 403 404 /***************************************************************************** 405 * 406 * Other tight constants 407 * 408 *****************************************************************************/ 409 410 /* 411 * Vendors known by TightVNC: standard VNC/RealVNC, TridiaVNC, and TightVNC. 412 */ 413 414 #define VNC_TIGHT_CCB_RESET_MASK (0x0f) 415 #define VNC_TIGHT_CCB_TYPE_MASK (0x0f << 4) 416 #define VNC_TIGHT_CCB_TYPE_FILL (0x08 << 4) 417 #define VNC_TIGHT_CCB_TYPE_JPEG (0x09 << 4) 418 #define VNC_TIGHT_CCB_TYPE_PNG (0x0A << 4) 419 #define VNC_TIGHT_CCB_BASIC_MAX (0x07 << 4) 420 #define VNC_TIGHT_CCB_BASIC_ZLIB (0x03 << 4) 421 #define VNC_TIGHT_CCB_BASIC_FILTER (0x04 << 4) 422 423 /***************************************************************************** 424 * 425 * Features 426 * 427 *****************************************************************************/ 428 429 #define VNC_FEATURE_RESIZE 0 430 #define VNC_FEATURE_HEXTILE 1 431 #define VNC_FEATURE_POINTER_TYPE_CHANGE 2 432 #define VNC_FEATURE_WMVI 3 433 #define VNC_FEATURE_TIGHT 4 434 #define VNC_FEATURE_ZLIB 5 435 #define VNC_FEATURE_COPYRECT 6 436 #define VNC_FEATURE_RICH_CURSOR 7 437 #define VNC_FEATURE_TIGHT_PNG 8 438 #define VNC_FEATURE_ZRLE 9 439 #define VNC_FEATURE_ZYWRLE 10 440 #define VNC_FEATURE_LED_STATE 11 441 442 #define VNC_FEATURE_RESIZE_MASK (1 << VNC_FEATURE_RESIZE) 443 #define VNC_FEATURE_HEXTILE_MASK (1 << VNC_FEATURE_HEXTILE) 444 #define VNC_FEATURE_POINTER_TYPE_CHANGE_MASK (1 << VNC_FEATURE_POINTER_TYPE_CHANGE) 445 #define VNC_FEATURE_WMVI_MASK (1 << VNC_FEATURE_WMVI) 446 #define VNC_FEATURE_TIGHT_MASK (1 << VNC_FEATURE_TIGHT) 447 #define VNC_FEATURE_ZLIB_MASK (1 << VNC_FEATURE_ZLIB) 448 #define VNC_FEATURE_COPYRECT_MASK (1 << VNC_FEATURE_COPYRECT) 449 #define VNC_FEATURE_RICH_CURSOR_MASK (1 << VNC_FEATURE_RICH_CURSOR) 450 #define VNC_FEATURE_TIGHT_PNG_MASK (1 << VNC_FEATURE_TIGHT_PNG) 451 #define VNC_FEATURE_ZRLE_MASK (1 << VNC_FEATURE_ZRLE) 452 #define VNC_FEATURE_ZYWRLE_MASK (1 << VNC_FEATURE_ZYWRLE) 453 #define VNC_FEATURE_LED_STATE_MASK (1 << VNC_FEATURE_LED_STATE) 454 455 456 /* Client -> Server message IDs */ 457 #define VNC_MSG_CLIENT_SET_PIXEL_FORMAT 0 458 #define VNC_MSG_CLIENT_SET_ENCODINGS 2 459 #define VNC_MSG_CLIENT_FRAMEBUFFER_UPDATE_REQUEST 3 460 #define VNC_MSG_CLIENT_KEY_EVENT 4 461 #define VNC_MSG_CLIENT_POINTER_EVENT 5 462 #define VNC_MSG_CLIENT_CUT_TEXT 6 463 #define VNC_MSG_CLIENT_VMWARE_0 127 464 #define VNC_MSG_CLIENT_CALL_CONTROL 249 465 #define VNC_MSG_CLIENT_XVP 250 466 #define VNC_MSG_CLIENT_SET_DESKTOP_SIZE 251 467 #define VNC_MSG_CLIENT_TIGHT 252 468 #define VNC_MSG_CLIENT_GII 253 469 #define VNC_MSG_CLIENT_VMWARE_1 254 470 #define VNC_MSG_CLIENT_QEMU 255 471 472 /* Server -> Client message IDs */ 473 #define VNC_MSG_SERVER_FRAMEBUFFER_UPDATE 0 474 #define VNC_MSG_SERVER_SET_COLOUR_MAP_ENTRIES 1 475 #define VNC_MSG_SERVER_BELL 2 476 #define VNC_MSG_SERVER_CUT_TEXT 3 477 #define VNC_MSG_SERVER_VMWARE_0 127 478 #define VNC_MSG_SERVER_CALL_CONTROL 249 479 #define VNC_MSG_SERVER_XVP 250 480 #define VNC_MSG_SERVER_TIGHT 252 481 #define VNC_MSG_SERVER_GII 253 482 #define VNC_MSG_SERVER_VMWARE_1 254 483 #define VNC_MSG_SERVER_QEMU 255 484 485 486 487 /* QEMU client -> server message IDs */ 488 #define VNC_MSG_CLIENT_QEMU_EXT_KEY_EVENT 0 489 #define VNC_MSG_CLIENT_QEMU_AUDIO 1 490 491 /* QEMU server -> client message IDs */ 492 #define VNC_MSG_SERVER_QEMU_AUDIO 1 493 494 495 496 /* QEMU client -> server audio message IDs */ 497 #define VNC_MSG_CLIENT_QEMU_AUDIO_ENABLE 0 498 #define VNC_MSG_CLIENT_QEMU_AUDIO_DISABLE 1 499 #define VNC_MSG_CLIENT_QEMU_AUDIO_SET_FORMAT 2 500 501 /* QEMU server -> client audio message IDs */ 502 #define VNC_MSG_SERVER_QEMU_AUDIO_END 0 503 #define VNC_MSG_SERVER_QEMU_AUDIO_BEGIN 1 504 #define VNC_MSG_SERVER_QEMU_AUDIO_DATA 2 505 506 507 /***************************************************************************** 508 * 509 * Internal APIs 510 * 511 *****************************************************************************/ 512 513 /* Event loop functions */ 514 void vnc_client_read(void *opaque); 515 void vnc_client_write(void *opaque); 516 517 long vnc_client_read_buf(VncState *vs, uint8_t *data, size_t datalen); 518 long vnc_client_write_buf(VncState *vs, const uint8_t *data, size_t datalen); 519 520 /* Protocol I/O functions */ 521 void vnc_write(VncState *vs, const void *data, size_t len); 522 void vnc_write_u32(VncState *vs, uint32_t value); 523 void vnc_write_s32(VncState *vs, int32_t value); 524 void vnc_write_u16(VncState *vs, uint16_t value); 525 void vnc_write_u8(VncState *vs, uint8_t value); 526 void vnc_flush(VncState *vs); 527 void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting); 528 void vnc_disconnect_finish(VncState *vs); 529 void vnc_init_state(VncState *vs); 530 531 532 /* Buffer I/O functions */ 533 uint32_t read_u32(uint8_t *data, size_t offset); 534 535 /* Protocol stage functions */ 536 void vnc_client_error(VncState *vs); 537 int vnc_client_io_error(VncState *vs, int ret, int last_errno); 538 539 void start_client_init(VncState *vs); 540 void start_auth_vnc(VncState *vs); 541 542 /* Buffer management */ 543 void buffer_reserve(Buffer *buffer, size_t len); 544 void buffer_reset(Buffer *buffer); 545 void buffer_free(Buffer *buffer); 546 void buffer_append(Buffer *buffer, const void *data, size_t len); 547 void buffer_advance(Buffer *buf, size_t len); 548 uint8_t *buffer_end(Buffer *buffer); 549 550 551 /* Misc helpers */ 552 553 char *vnc_socket_local_addr(const char *format, int fd); 554 char *vnc_socket_remote_addr(const char *format, int fd); 555 556 static inline uint32_t vnc_has_feature(VncState *vs, int feature) { 557 return (vs->features & (1 << feature)); 558 } 559 560 /* Framebuffer */ 561 void vnc_framebuffer_update(VncState *vs, int x, int y, int w, int h, 562 int32_t encoding); 563 564 /* server fb is in PIXMAN_x8r8g8b8 */ 565 #define VNC_SERVER_FB_FORMAT PIXMAN_FORMAT(32, PIXMAN_TYPE_ARGB, 0, 8, 8, 8) 566 #define VNC_SERVER_FB_BITS (PIXMAN_FORMAT_BPP(VNC_SERVER_FB_FORMAT)) 567 #define VNC_SERVER_FB_BYTES ((VNC_SERVER_FB_BITS+7)/8) 568 569 void *vnc_server_fb_ptr(VncDisplay *vd, int x, int y); 570 int vnc_server_fb_stride(VncDisplay *vd); 571 572 void vnc_convert_pixel(VncState *vs, uint8_t *buf, uint32_t v); 573 double vnc_update_freq(VncState *vs, int x, int y, int w, int h); 574 void vnc_sent_lossy_rect(VncState *vs, int x, int y, int w, int h); 575 576 /* Encodings */ 577 int vnc_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); 578 579 int vnc_raw_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); 580 581 int vnc_hextile_send_framebuffer_update(VncState *vs, int x, 582 int y, int w, int h); 583 void vnc_hextile_set_pixel_conversion(VncState *vs, int generic); 584 585 void *vnc_zlib_zalloc(void *x, unsigned items, unsigned size); 586 void vnc_zlib_zfree(void *x, void *addr); 587 int vnc_zlib_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); 588 void vnc_zlib_clear(VncState *vs); 589 590 int vnc_tight_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); 591 int vnc_tight_png_send_framebuffer_update(VncState *vs, int x, int y, 592 int w, int h); 593 void vnc_tight_clear(VncState *vs); 594 595 int vnc_zrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); 596 int vnc_zywrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); 597 void vnc_zrle_clear(VncState *vs); 598 599 #endif /* __QEMU_VNC_H */ 600