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 "qemu/buffer.h" 38 #include "io/channel-socket.h" 39 #include "io/channel-tls.h" 40 #include "io/net-listener.h" 41 #include <zlib.h> 42 43 #include "keymaps.h" 44 #include "vnc-palette.h" 45 #include "vnc-enc-zrle.h" 46 47 // #define _VNC_DEBUG 1 48 49 #ifdef _VNC_DEBUG 50 #define VNC_DEBUG(fmt, ...) do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) 51 #else 52 #define VNC_DEBUG(fmt, ...) do { } while (0) 53 #endif 54 55 /***************************************************************************** 56 * 57 * Core data structures 58 * 59 *****************************************************************************/ 60 61 typedef struct VncState VncState; 62 typedef struct VncJob VncJob; 63 typedef struct VncRect VncRect; 64 typedef struct VncRectEntry VncRectEntry; 65 66 typedef int VncReadEvent(VncState *vs, uint8_t *data, size_t len); 67 68 typedef void VncWritePixels(VncState *vs, void *data, int size); 69 70 typedef void VncSendHextileTile(VncState *vs, 71 int x, int y, int w, int h, 72 void *last_bg, 73 void *last_fg, 74 int *has_bg, int *has_fg); 75 76 /* VNC_DIRTY_PIXELS_PER_BIT is the number of dirty pixels represented 77 * by one bit in the dirty bitmap, should be a power of 2 */ 78 #define VNC_DIRTY_PIXELS_PER_BIT 16 79 80 /* VNC_MAX_WIDTH must be a multiple of VNC_DIRTY_PIXELS_PER_BIT. */ 81 82 #define VNC_MAX_WIDTH ROUND_UP(2560, VNC_DIRTY_PIXELS_PER_BIT) 83 #define VNC_MAX_HEIGHT 2048 84 85 /* VNC_DIRTY_BITS is the number of bits in the dirty bitmap. */ 86 #define VNC_DIRTY_BITS (VNC_MAX_WIDTH / VNC_DIRTY_PIXELS_PER_BIT) 87 88 /* VNC_DIRTY_BPL (BPL = bits per line) might be greater than 89 * VNC_DIRTY_BITS due to alignment */ 90 #define VNC_DIRTY_BPL(x) (sizeof((x)->dirty) / VNC_MAX_HEIGHT * BITS_PER_BYTE) 91 92 #define VNC_STAT_RECT 64 93 #define VNC_STAT_COLS (VNC_MAX_WIDTH / VNC_STAT_RECT) 94 #define VNC_STAT_ROWS (VNC_MAX_HEIGHT / VNC_STAT_RECT) 95 96 #define VNC_AUTH_CHALLENGE_SIZE 16 97 98 typedef struct VncDisplay VncDisplay; 99 100 #include "vnc-auth-vencrypt.h" 101 #ifdef CONFIG_VNC_SASL 102 #include "vnc-auth-sasl.h" 103 #endif 104 #include "vnc-ws.h" 105 106 struct VncRectStat 107 { 108 /* time of last 10 updates, to find update frequency */ 109 struct timeval times[10]; 110 int idx; 111 112 double freq; /* Update frequency (in Hz) */ 113 bool updated; /* Already updated during this refresh */ 114 }; 115 116 typedef struct VncRectStat VncRectStat; 117 118 struct VncSurface 119 { 120 struct timeval last_freq_check; 121 DECLARE_BITMAP(dirty[VNC_MAX_HEIGHT], 122 VNC_MAX_WIDTH / VNC_DIRTY_PIXELS_PER_BIT); 123 VncRectStat stats[VNC_STAT_ROWS][VNC_STAT_COLS]; 124 pixman_image_t *fb; 125 pixman_format_code_t format; 126 }; 127 128 typedef enum VncShareMode { 129 VNC_SHARE_MODE_CONNECTING = 1, 130 VNC_SHARE_MODE_SHARED, 131 VNC_SHARE_MODE_EXCLUSIVE, 132 VNC_SHARE_MODE_DISCONNECTED, 133 } VncShareMode; 134 135 typedef enum VncSharePolicy { 136 VNC_SHARE_POLICY_IGNORE = 1, 137 VNC_SHARE_POLICY_ALLOW_EXCLUSIVE, 138 VNC_SHARE_POLICY_FORCE_SHARED, 139 } VncSharePolicy; 140 141 struct VncDisplay 142 { 143 QTAILQ_HEAD(, VncState) clients; 144 int num_connecting; 145 int num_shared; 146 int num_exclusive; 147 int connections_limit; 148 VncSharePolicy share_policy; 149 QIONetListener *listener; 150 QIONetListener *wslistener; 151 DisplaySurface *ds; 152 DisplayChangeListener dcl; 153 kbd_layout_t *kbd_layout; 154 int lock_key_sync; 155 QEMUPutLEDEntry *led; 156 int ledstate; 157 int key_delay_ms; 158 QemuMutex mutex; 159 160 QEMUCursor *cursor; 161 int cursor_msize; 162 uint8_t *cursor_mask; 163 164 struct VncSurface guest; /* guest visible surface (aka ds->surface) */ 165 pixman_image_t *server; /* vnc server surface */ 166 167 const char *id; 168 QTAILQ_ENTRY(VncDisplay) next; 169 bool is_unix; 170 char *password; 171 time_t expires; 172 int auth; 173 int subauth; /* Used by VeNCrypt */ 174 int ws_auth; /* Used by websockets */ 175 int ws_subauth; /* Used by websockets */ 176 bool lossy; 177 bool non_adaptive; 178 QCryptoTLSCreds *tlscreds; 179 char *tlsaclname; 180 #ifdef CONFIG_VNC_SASL 181 VncDisplaySASL sasl; 182 #endif 183 }; 184 185 typedef struct VncTight { 186 int type; 187 uint8_t quality; 188 uint8_t compression; 189 uint8_t pixel24; 190 Buffer tight; 191 Buffer tmp; 192 Buffer zlib; 193 Buffer gradient; 194 #ifdef CONFIG_VNC_JPEG 195 Buffer jpeg; 196 #endif 197 #ifdef CONFIG_VNC_PNG 198 Buffer png; 199 #endif 200 int levels[4]; 201 z_stream stream[4]; 202 } VncTight; 203 204 typedef struct VncHextile { 205 VncSendHextileTile *send_tile; 206 } VncHextile; 207 208 typedef struct VncZlib { 209 Buffer zlib; 210 Buffer tmp; 211 z_stream stream; 212 int level; 213 } VncZlib; 214 215 typedef struct VncZrle { 216 int type; 217 Buffer fb; 218 Buffer zrle; 219 Buffer tmp; 220 Buffer zlib; 221 z_stream stream; 222 VncPalette palette; 223 } VncZrle; 224 225 typedef struct VncZywrle { 226 int buf[VNC_ZRLE_TILE_WIDTH * VNC_ZRLE_TILE_HEIGHT]; 227 } VncZywrle; 228 229 struct VncRect 230 { 231 int x; 232 int y; 233 int w; 234 int h; 235 }; 236 237 struct VncRectEntry 238 { 239 struct VncRect rect; 240 QLIST_ENTRY(VncRectEntry) next; 241 }; 242 243 struct VncJob 244 { 245 VncState *vs; 246 247 QLIST_HEAD(, VncRectEntry) rectangles; 248 QTAILQ_ENTRY(VncJob) next; 249 }; 250 251 typedef enum { 252 VNC_STATE_UPDATE_NONE, 253 VNC_STATE_UPDATE_INCREMENTAL, 254 VNC_STATE_UPDATE_FORCE, 255 } VncStateUpdate; 256 257 struct VncState 258 { 259 QIOChannelSocket *sioc; /* The underlying socket */ 260 QIOChannel *ioc; /* The channel currently used for I/O */ 261 guint ioc_tag; 262 gboolean disconnecting; 263 264 DECLARE_BITMAP(dirty[VNC_MAX_HEIGHT], VNC_DIRTY_BITS); 265 uint8_t **lossy_rect; /* Not an Array to avoid costly memcpy in 266 * vnc-jobs-async.c */ 267 268 VncDisplay *vd; 269 VncStateUpdate update; /* Most recent pending request from client */ 270 VncStateUpdate job_update; /* Currently processed by job thread */ 271 int has_dirty; 272 uint32_t features; 273 int absolute; 274 int last_x; 275 int last_y; 276 uint32_t last_bmask; 277 size_t client_width; /* limited to u16 by RFB proto */ 278 size_t client_height; /* limited to u16 by RFB proto */ 279 VncShareMode share_mode; 280 281 uint32_t vnc_encoding; 282 283 int major; 284 int minor; 285 286 int auth; 287 int subauth; /* Used by VeNCrypt */ 288 char challenge[VNC_AUTH_CHALLENGE_SIZE]; 289 QCryptoTLSSession *tls; /* Borrowed pointer from channel, don't free */ 290 #ifdef CONFIG_VNC_SASL 291 VncStateSASL sasl; 292 #endif 293 bool encode_ws; 294 bool websocket; 295 296 VncClientInfo *info; 297 298 /* Job thread bottom half has put data for a forced update 299 * into the output buffer. This offset points to the end of 300 * the update data in the output buffer. This lets us determine 301 * when a force update is fully sent to the client, allowing 302 * us to process further forced updates. */ 303 size_t force_update_offset; 304 /* We allow multiple incremental updates or audio capture 305 * samples to be queued in output buffer, provided the 306 * buffer size doesn't exceed this threshold. The value 307 * is calculating dynamically based on framebuffer size 308 * and audio sample settings in vnc_update_throttle_offset() */ 309 size_t throttle_output_offset; 310 Buffer output; 311 Buffer input; 312 /* current output mode information */ 313 VncWritePixels *write_pixels; 314 PixelFormat client_pf; 315 pixman_format_code_t client_format; 316 bool client_be; 317 318 CaptureVoiceOut *audio_cap; 319 struct audsettings as; 320 321 VncReadEvent *read_handler; 322 size_t read_handler_expect; 323 /* input */ 324 uint8_t modifiers_state[256]; 325 326 bool abort; 327 QemuMutex output_mutex; 328 QEMUBH *bh; 329 Buffer jobs_buffer; 330 331 /* Encoding specific, if you add something here, don't forget to 332 * update vnc_async_encoding_start() 333 */ 334 VncTight tight; 335 VncZlib zlib; 336 VncHextile hextile; 337 VncZrle zrle; 338 VncZywrle zywrle; 339 340 Notifier mouse_mode_notifier; 341 342 QTAILQ_ENTRY(VncState) next; 343 }; 344 345 346 /***************************************************************************** 347 * 348 * Authentication modes 349 * 350 *****************************************************************************/ 351 352 enum { 353 VNC_AUTH_INVALID = 0, 354 VNC_AUTH_NONE = 1, 355 VNC_AUTH_VNC = 2, 356 VNC_AUTH_RA2 = 5, 357 VNC_AUTH_RA2NE = 6, 358 VNC_AUTH_TIGHT = 16, 359 VNC_AUTH_ULTRA = 17, 360 VNC_AUTH_TLS = 18, /* Supported in GTK-VNC & VINO */ 361 VNC_AUTH_VENCRYPT = 19, /* Supported in GTK-VNC & VeNCrypt */ 362 VNC_AUTH_SASL = 20, /* Supported in GTK-VNC & VINO */ 363 }; 364 365 enum { 366 VNC_AUTH_VENCRYPT_PLAIN = 256, 367 VNC_AUTH_VENCRYPT_TLSNONE = 257, 368 VNC_AUTH_VENCRYPT_TLSVNC = 258, 369 VNC_AUTH_VENCRYPT_TLSPLAIN = 259, 370 VNC_AUTH_VENCRYPT_X509NONE = 260, 371 VNC_AUTH_VENCRYPT_X509VNC = 261, 372 VNC_AUTH_VENCRYPT_X509PLAIN = 262, 373 VNC_AUTH_VENCRYPT_X509SASL = 263, 374 VNC_AUTH_VENCRYPT_TLSSASL = 264, 375 }; 376 377 378 /***************************************************************************** 379 * 380 * Encoding types 381 * 382 *****************************************************************************/ 383 384 #define VNC_ENCODING_RAW 0x00000000 385 #define VNC_ENCODING_COPYRECT 0x00000001 386 #define VNC_ENCODING_RRE 0x00000002 387 #define VNC_ENCODING_CORRE 0x00000004 388 #define VNC_ENCODING_HEXTILE 0x00000005 389 #define VNC_ENCODING_ZLIB 0x00000006 390 #define VNC_ENCODING_TIGHT 0x00000007 391 #define VNC_ENCODING_ZLIBHEX 0x00000008 392 #define VNC_ENCODING_TRLE 0x0000000f 393 #define VNC_ENCODING_ZRLE 0x00000010 394 #define VNC_ENCODING_ZYWRLE 0x00000011 395 #define VNC_ENCODING_COMPRESSLEVEL0 0xFFFFFF00 /* -256 */ 396 #define VNC_ENCODING_QUALITYLEVEL0 0xFFFFFFE0 /* -32 */ 397 #define VNC_ENCODING_XCURSOR 0xFFFFFF10 /* -240 */ 398 #define VNC_ENCODING_RICH_CURSOR 0xFFFFFF11 /* -239 */ 399 #define VNC_ENCODING_POINTER_POS 0xFFFFFF18 /* -232 */ 400 #define VNC_ENCODING_LASTRECT 0xFFFFFF20 /* -224 */ 401 #define VNC_ENCODING_DESKTOPRESIZE 0xFFFFFF21 /* -223 */ 402 #define VNC_ENCODING_POINTER_TYPE_CHANGE 0XFFFFFEFF /* -257 */ 403 #define VNC_ENCODING_EXT_KEY_EVENT 0XFFFFFEFE /* -258 */ 404 #define VNC_ENCODING_AUDIO 0XFFFFFEFD /* -259 */ 405 #define VNC_ENCODING_TIGHT_PNG 0xFFFFFEFC /* -260 */ 406 #define VNC_ENCODING_LED_STATE 0XFFFFFEFB /* -261 */ 407 #define VNC_ENCODING_WMVi 0x574D5669 408 409 /***************************************************************************** 410 * 411 * Other tight constants 412 * 413 *****************************************************************************/ 414 415 /* 416 * Vendors known by TightVNC: standard VNC/RealVNC, TridiaVNC, and TightVNC. 417 */ 418 419 #define VNC_TIGHT_CCB_RESET_MASK (0x0f) 420 #define VNC_TIGHT_CCB_TYPE_MASK (0x0f << 4) 421 #define VNC_TIGHT_CCB_TYPE_FILL (0x08 << 4) 422 #define VNC_TIGHT_CCB_TYPE_JPEG (0x09 << 4) 423 #define VNC_TIGHT_CCB_TYPE_PNG (0x0A << 4) 424 #define VNC_TIGHT_CCB_BASIC_MAX (0x07 << 4) 425 #define VNC_TIGHT_CCB_BASIC_ZLIB (0x03 << 4) 426 #define VNC_TIGHT_CCB_BASIC_FILTER (0x04 << 4) 427 428 /***************************************************************************** 429 * 430 * Features 431 * 432 *****************************************************************************/ 433 434 #define VNC_FEATURE_RESIZE 0 435 #define VNC_FEATURE_HEXTILE 1 436 #define VNC_FEATURE_POINTER_TYPE_CHANGE 2 437 #define VNC_FEATURE_WMVI 3 438 #define VNC_FEATURE_TIGHT 4 439 #define VNC_FEATURE_ZLIB 5 440 #define VNC_FEATURE_COPYRECT 6 441 #define VNC_FEATURE_RICH_CURSOR 7 442 #define VNC_FEATURE_TIGHT_PNG 8 443 #define VNC_FEATURE_ZRLE 9 444 #define VNC_FEATURE_ZYWRLE 10 445 #define VNC_FEATURE_LED_STATE 11 446 447 #define VNC_FEATURE_RESIZE_MASK (1 << VNC_FEATURE_RESIZE) 448 #define VNC_FEATURE_HEXTILE_MASK (1 << VNC_FEATURE_HEXTILE) 449 #define VNC_FEATURE_POINTER_TYPE_CHANGE_MASK (1 << VNC_FEATURE_POINTER_TYPE_CHANGE) 450 #define VNC_FEATURE_WMVI_MASK (1 << VNC_FEATURE_WMVI) 451 #define VNC_FEATURE_TIGHT_MASK (1 << VNC_FEATURE_TIGHT) 452 #define VNC_FEATURE_ZLIB_MASK (1 << VNC_FEATURE_ZLIB) 453 #define VNC_FEATURE_COPYRECT_MASK (1 << VNC_FEATURE_COPYRECT) 454 #define VNC_FEATURE_RICH_CURSOR_MASK (1 << VNC_FEATURE_RICH_CURSOR) 455 #define VNC_FEATURE_TIGHT_PNG_MASK (1 << VNC_FEATURE_TIGHT_PNG) 456 #define VNC_FEATURE_ZRLE_MASK (1 << VNC_FEATURE_ZRLE) 457 #define VNC_FEATURE_ZYWRLE_MASK (1 << VNC_FEATURE_ZYWRLE) 458 #define VNC_FEATURE_LED_STATE_MASK (1 << VNC_FEATURE_LED_STATE) 459 460 461 /* Client -> Server message IDs */ 462 #define VNC_MSG_CLIENT_SET_PIXEL_FORMAT 0 463 #define VNC_MSG_CLIENT_SET_ENCODINGS 2 464 #define VNC_MSG_CLIENT_FRAMEBUFFER_UPDATE_REQUEST 3 465 #define VNC_MSG_CLIENT_KEY_EVENT 4 466 #define VNC_MSG_CLIENT_POINTER_EVENT 5 467 #define VNC_MSG_CLIENT_CUT_TEXT 6 468 #define VNC_MSG_CLIENT_VMWARE_0 127 469 #define VNC_MSG_CLIENT_CALL_CONTROL 249 470 #define VNC_MSG_CLIENT_XVP 250 471 #define VNC_MSG_CLIENT_SET_DESKTOP_SIZE 251 472 #define VNC_MSG_CLIENT_TIGHT 252 473 #define VNC_MSG_CLIENT_GII 253 474 #define VNC_MSG_CLIENT_VMWARE_1 254 475 #define VNC_MSG_CLIENT_QEMU 255 476 477 /* Server -> Client message IDs */ 478 #define VNC_MSG_SERVER_FRAMEBUFFER_UPDATE 0 479 #define VNC_MSG_SERVER_SET_COLOUR_MAP_ENTRIES 1 480 #define VNC_MSG_SERVER_BELL 2 481 #define VNC_MSG_SERVER_CUT_TEXT 3 482 #define VNC_MSG_SERVER_VMWARE_0 127 483 #define VNC_MSG_SERVER_CALL_CONTROL 249 484 #define VNC_MSG_SERVER_XVP 250 485 #define VNC_MSG_SERVER_TIGHT 252 486 #define VNC_MSG_SERVER_GII 253 487 #define VNC_MSG_SERVER_VMWARE_1 254 488 #define VNC_MSG_SERVER_QEMU 255 489 490 491 492 /* QEMU client -> server message IDs */ 493 #define VNC_MSG_CLIENT_QEMU_EXT_KEY_EVENT 0 494 #define VNC_MSG_CLIENT_QEMU_AUDIO 1 495 496 /* QEMU server -> client message IDs */ 497 #define VNC_MSG_SERVER_QEMU_AUDIO 1 498 499 500 501 /* QEMU client -> server audio message IDs */ 502 #define VNC_MSG_CLIENT_QEMU_AUDIO_ENABLE 0 503 #define VNC_MSG_CLIENT_QEMU_AUDIO_DISABLE 1 504 #define VNC_MSG_CLIENT_QEMU_AUDIO_SET_FORMAT 2 505 506 /* QEMU server -> client audio message IDs */ 507 #define VNC_MSG_SERVER_QEMU_AUDIO_END 0 508 #define VNC_MSG_SERVER_QEMU_AUDIO_BEGIN 1 509 #define VNC_MSG_SERVER_QEMU_AUDIO_DATA 2 510 511 512 /***************************************************************************** 513 * 514 * Internal APIs 515 * 516 *****************************************************************************/ 517 518 /* Event loop functions */ 519 gboolean vnc_client_io(QIOChannel *ioc, 520 GIOCondition condition, 521 void *opaque); 522 523 size_t vnc_client_read_buf(VncState *vs, uint8_t *data, size_t datalen); 524 size_t vnc_client_write_buf(VncState *vs, const uint8_t *data, size_t datalen); 525 526 /* Protocol I/O functions */ 527 void vnc_write(VncState *vs, const void *data, size_t len); 528 void vnc_write_u32(VncState *vs, uint32_t value); 529 void vnc_write_s32(VncState *vs, int32_t value); 530 void vnc_write_u16(VncState *vs, uint16_t value); 531 void vnc_write_u8(VncState *vs, uint8_t value); 532 void vnc_flush(VncState *vs); 533 void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting); 534 void vnc_disconnect_finish(VncState *vs); 535 void vnc_start_protocol(VncState *vs); 536 537 538 /* Buffer I/O functions */ 539 uint32_t read_u32(uint8_t *data, size_t offset); 540 541 /* Protocol stage functions */ 542 void vnc_client_error(VncState *vs); 543 size_t vnc_client_io_error(VncState *vs, ssize_t ret, Error **errp); 544 545 void start_client_init(VncState *vs); 546 void start_auth_vnc(VncState *vs); 547 548 549 /* Misc helpers */ 550 551 static inline uint32_t vnc_has_feature(VncState *vs, int feature) { 552 return (vs->features & (1 << feature)); 553 } 554 555 /* Framebuffer */ 556 void vnc_framebuffer_update(VncState *vs, int x, int y, int w, int h, 557 int32_t encoding); 558 559 /* server fb is in PIXMAN_x8r8g8b8 */ 560 #define VNC_SERVER_FB_FORMAT PIXMAN_FORMAT(32, PIXMAN_TYPE_ARGB, 0, 8, 8, 8) 561 #define VNC_SERVER_FB_BITS (PIXMAN_FORMAT_BPP(VNC_SERVER_FB_FORMAT)) 562 #define VNC_SERVER_FB_BYTES ((VNC_SERVER_FB_BITS+7)/8) 563 564 void *vnc_server_fb_ptr(VncDisplay *vd, int x, int y); 565 int vnc_server_fb_stride(VncDisplay *vd); 566 567 void vnc_convert_pixel(VncState *vs, uint8_t *buf, uint32_t v); 568 double vnc_update_freq(VncState *vs, int x, int y, int w, int h); 569 void vnc_sent_lossy_rect(VncState *vs, int x, int y, int w, int h); 570 571 /* Encodings */ 572 int vnc_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); 573 574 int vnc_raw_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); 575 576 int vnc_hextile_send_framebuffer_update(VncState *vs, int x, 577 int y, int w, int h); 578 void vnc_hextile_set_pixel_conversion(VncState *vs, int generic); 579 580 void *vnc_zlib_zalloc(void *x, unsigned items, unsigned size); 581 void vnc_zlib_zfree(void *x, void *addr); 582 int vnc_zlib_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); 583 void vnc_zlib_clear(VncState *vs); 584 585 int vnc_tight_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); 586 int vnc_tight_png_send_framebuffer_update(VncState *vs, int x, int y, 587 int w, int h); 588 void vnc_tight_clear(VncState *vs); 589 590 int vnc_zrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); 591 int vnc_zywrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); 592 void vnc_zrle_clear(VncState *vs); 593 594 #endif /* QEMU_VNC_H */ 595