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 <zlib.h> 41 42 #include "keymaps.h" 43 #include "vnc-palette.h" 44 #include "vnc-enc-zrle.h" 45 #include "qapi-types.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 size_t nlsock; 150 QIOChannelSocket **lsock; 151 guint *lsock_tag; 152 size_t nlwebsock; 153 QIOChannelSocket **lwebsock; 154 guint *lwebsock_tag; 155 DisplaySurface *ds; 156 DisplayChangeListener dcl; 157 kbd_layout_t *kbd_layout; 158 int lock_key_sync; 159 QEMUPutLEDEntry *led; 160 int ledstate; 161 int key_delay_ms; 162 QemuMutex mutex; 163 164 QEMUCursor *cursor; 165 int cursor_msize; 166 uint8_t *cursor_mask; 167 168 struct VncSurface guest; /* guest visible surface (aka ds->surface) */ 169 pixman_image_t *server; /* vnc server surface */ 170 171 const char *id; 172 QTAILQ_ENTRY(VncDisplay) next; 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 int ws_subauth; /* 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 typedef enum { 256 VNC_STATE_UPDATE_NONE, 257 VNC_STATE_UPDATE_INCREMENTAL, 258 VNC_STATE_UPDATE_FORCE, 259 } VncStateUpdate; 260 261 struct VncState 262 { 263 QIOChannelSocket *sioc; /* The underlying socket */ 264 QIOChannel *ioc; /* The channel currently used for I/O */ 265 guint ioc_tag; 266 gboolean disconnecting; 267 268 DECLARE_BITMAP(dirty[VNC_MAX_HEIGHT], VNC_DIRTY_BITS); 269 uint8_t **lossy_rect; /* Not an Array to avoid costly memcpy in 270 * vnc-jobs-async.c */ 271 272 VncDisplay *vd; 273 VncStateUpdate update; /* Most recent pending request from client */ 274 VncStateUpdate job_update; /* Currently processed by job thread */ 275 int has_dirty; 276 uint32_t features; 277 int absolute; 278 int last_x; 279 int last_y; 280 uint32_t last_bmask; 281 int client_width; 282 int client_height; 283 VncShareMode share_mode; 284 285 uint32_t vnc_encoding; 286 287 int major; 288 int minor; 289 290 int auth; 291 int subauth; /* Used by VeNCrypt */ 292 char challenge[VNC_AUTH_CHALLENGE_SIZE]; 293 QCryptoTLSSession *tls; /* Borrowed pointer from channel, don't free */ 294 #ifdef CONFIG_VNC_SASL 295 VncStateSASL sasl; 296 #endif 297 bool encode_ws; 298 bool websocket; 299 300 VncClientInfo *info; 301 302 /* Job thread bottom half has put data for a forced update 303 * into the output buffer. This offset points to the end of 304 * the update data in the output buffer. This lets us determine 305 * when a force update is fully sent to the client, allowing 306 * us to process further forced updates. */ 307 size_t force_update_offset; 308 /* We allow multiple incremental updates or audio capture 309 * samples to be queued in output buffer, provided the 310 * buffer size doesn't exceed this threshold. The value 311 * is calculating dynamically based on framebuffer size 312 * and audio sample settings in vnc_update_throttle_offset() */ 313 size_t throttle_output_offset; 314 Buffer output; 315 Buffer input; 316 /* current output mode information */ 317 VncWritePixels *write_pixels; 318 PixelFormat client_pf; 319 pixman_format_code_t client_format; 320 bool client_be; 321 322 CaptureVoiceOut *audio_cap; 323 struct audsettings as; 324 325 VncReadEvent *read_handler; 326 size_t read_handler_expect; 327 /* input */ 328 uint8_t modifiers_state[256]; 329 330 bool abort; 331 QemuMutex output_mutex; 332 QEMUBH *bh; 333 Buffer jobs_buffer; 334 335 /* Encoding specific, if you add something here, don't forget to 336 * update vnc_async_encoding_start() 337 */ 338 VncTight tight; 339 VncZlib zlib; 340 VncHextile hextile; 341 VncZrle zrle; 342 VncZywrle zywrle; 343 344 Notifier mouse_mode_notifier; 345 346 QTAILQ_ENTRY(VncState) next; 347 }; 348 349 350 /***************************************************************************** 351 * 352 * Authentication modes 353 * 354 *****************************************************************************/ 355 356 enum { 357 VNC_AUTH_INVALID = 0, 358 VNC_AUTH_NONE = 1, 359 VNC_AUTH_VNC = 2, 360 VNC_AUTH_RA2 = 5, 361 VNC_AUTH_RA2NE = 6, 362 VNC_AUTH_TIGHT = 16, 363 VNC_AUTH_ULTRA = 17, 364 VNC_AUTH_TLS = 18, /* Supported in GTK-VNC & VINO */ 365 VNC_AUTH_VENCRYPT = 19, /* Supported in GTK-VNC & VeNCrypt */ 366 VNC_AUTH_SASL = 20, /* Supported in GTK-VNC & VINO */ 367 }; 368 369 enum { 370 VNC_AUTH_VENCRYPT_PLAIN = 256, 371 VNC_AUTH_VENCRYPT_TLSNONE = 257, 372 VNC_AUTH_VENCRYPT_TLSVNC = 258, 373 VNC_AUTH_VENCRYPT_TLSPLAIN = 259, 374 VNC_AUTH_VENCRYPT_X509NONE = 260, 375 VNC_AUTH_VENCRYPT_X509VNC = 261, 376 VNC_AUTH_VENCRYPT_X509PLAIN = 262, 377 VNC_AUTH_VENCRYPT_X509SASL = 263, 378 VNC_AUTH_VENCRYPT_TLSSASL = 264, 379 }; 380 381 382 /***************************************************************************** 383 * 384 * Encoding types 385 * 386 *****************************************************************************/ 387 388 #define VNC_ENCODING_RAW 0x00000000 389 #define VNC_ENCODING_COPYRECT 0x00000001 390 #define VNC_ENCODING_RRE 0x00000002 391 #define VNC_ENCODING_CORRE 0x00000004 392 #define VNC_ENCODING_HEXTILE 0x00000005 393 #define VNC_ENCODING_ZLIB 0x00000006 394 #define VNC_ENCODING_TIGHT 0x00000007 395 #define VNC_ENCODING_ZLIBHEX 0x00000008 396 #define VNC_ENCODING_TRLE 0x0000000f 397 #define VNC_ENCODING_ZRLE 0x00000010 398 #define VNC_ENCODING_ZYWRLE 0x00000011 399 #define VNC_ENCODING_COMPRESSLEVEL0 0xFFFFFF00 /* -256 */ 400 #define VNC_ENCODING_QUALITYLEVEL0 0xFFFFFFE0 /* -32 */ 401 #define VNC_ENCODING_XCURSOR 0xFFFFFF10 /* -240 */ 402 #define VNC_ENCODING_RICH_CURSOR 0xFFFFFF11 /* -239 */ 403 #define VNC_ENCODING_POINTER_POS 0xFFFFFF18 /* -232 */ 404 #define VNC_ENCODING_LASTRECT 0xFFFFFF20 /* -224 */ 405 #define VNC_ENCODING_DESKTOPRESIZE 0xFFFFFF21 /* -223 */ 406 #define VNC_ENCODING_POINTER_TYPE_CHANGE 0XFFFFFEFF /* -257 */ 407 #define VNC_ENCODING_EXT_KEY_EVENT 0XFFFFFEFE /* -258 */ 408 #define VNC_ENCODING_AUDIO 0XFFFFFEFD /* -259 */ 409 #define VNC_ENCODING_TIGHT_PNG 0xFFFFFEFC /* -260 */ 410 #define VNC_ENCODING_LED_STATE 0XFFFFFEFB /* -261 */ 411 #define VNC_ENCODING_WMVi 0x574D5669 412 413 /***************************************************************************** 414 * 415 * Other tight constants 416 * 417 *****************************************************************************/ 418 419 /* 420 * Vendors known by TightVNC: standard VNC/RealVNC, TridiaVNC, and TightVNC. 421 */ 422 423 #define VNC_TIGHT_CCB_RESET_MASK (0x0f) 424 #define VNC_TIGHT_CCB_TYPE_MASK (0x0f << 4) 425 #define VNC_TIGHT_CCB_TYPE_FILL (0x08 << 4) 426 #define VNC_TIGHT_CCB_TYPE_JPEG (0x09 << 4) 427 #define VNC_TIGHT_CCB_TYPE_PNG (0x0A << 4) 428 #define VNC_TIGHT_CCB_BASIC_MAX (0x07 << 4) 429 #define VNC_TIGHT_CCB_BASIC_ZLIB (0x03 << 4) 430 #define VNC_TIGHT_CCB_BASIC_FILTER (0x04 << 4) 431 432 /***************************************************************************** 433 * 434 * Features 435 * 436 *****************************************************************************/ 437 438 #define VNC_FEATURE_RESIZE 0 439 #define VNC_FEATURE_HEXTILE 1 440 #define VNC_FEATURE_POINTER_TYPE_CHANGE 2 441 #define VNC_FEATURE_WMVI 3 442 #define VNC_FEATURE_TIGHT 4 443 #define VNC_FEATURE_ZLIB 5 444 #define VNC_FEATURE_COPYRECT 6 445 #define VNC_FEATURE_RICH_CURSOR 7 446 #define VNC_FEATURE_TIGHT_PNG 8 447 #define VNC_FEATURE_ZRLE 9 448 #define VNC_FEATURE_ZYWRLE 10 449 #define VNC_FEATURE_LED_STATE 11 450 451 #define VNC_FEATURE_RESIZE_MASK (1 << VNC_FEATURE_RESIZE) 452 #define VNC_FEATURE_HEXTILE_MASK (1 << VNC_FEATURE_HEXTILE) 453 #define VNC_FEATURE_POINTER_TYPE_CHANGE_MASK (1 << VNC_FEATURE_POINTER_TYPE_CHANGE) 454 #define VNC_FEATURE_WMVI_MASK (1 << VNC_FEATURE_WMVI) 455 #define VNC_FEATURE_TIGHT_MASK (1 << VNC_FEATURE_TIGHT) 456 #define VNC_FEATURE_ZLIB_MASK (1 << VNC_FEATURE_ZLIB) 457 #define VNC_FEATURE_COPYRECT_MASK (1 << VNC_FEATURE_COPYRECT) 458 #define VNC_FEATURE_RICH_CURSOR_MASK (1 << VNC_FEATURE_RICH_CURSOR) 459 #define VNC_FEATURE_TIGHT_PNG_MASK (1 << VNC_FEATURE_TIGHT_PNG) 460 #define VNC_FEATURE_ZRLE_MASK (1 << VNC_FEATURE_ZRLE) 461 #define VNC_FEATURE_ZYWRLE_MASK (1 << VNC_FEATURE_ZYWRLE) 462 #define VNC_FEATURE_LED_STATE_MASK (1 << VNC_FEATURE_LED_STATE) 463 464 465 /* Client -> Server message IDs */ 466 #define VNC_MSG_CLIENT_SET_PIXEL_FORMAT 0 467 #define VNC_MSG_CLIENT_SET_ENCODINGS 2 468 #define VNC_MSG_CLIENT_FRAMEBUFFER_UPDATE_REQUEST 3 469 #define VNC_MSG_CLIENT_KEY_EVENT 4 470 #define VNC_MSG_CLIENT_POINTER_EVENT 5 471 #define VNC_MSG_CLIENT_CUT_TEXT 6 472 #define VNC_MSG_CLIENT_VMWARE_0 127 473 #define VNC_MSG_CLIENT_CALL_CONTROL 249 474 #define VNC_MSG_CLIENT_XVP 250 475 #define VNC_MSG_CLIENT_SET_DESKTOP_SIZE 251 476 #define VNC_MSG_CLIENT_TIGHT 252 477 #define VNC_MSG_CLIENT_GII 253 478 #define VNC_MSG_CLIENT_VMWARE_1 254 479 #define VNC_MSG_CLIENT_QEMU 255 480 481 /* Server -> Client message IDs */ 482 #define VNC_MSG_SERVER_FRAMEBUFFER_UPDATE 0 483 #define VNC_MSG_SERVER_SET_COLOUR_MAP_ENTRIES 1 484 #define VNC_MSG_SERVER_BELL 2 485 #define VNC_MSG_SERVER_CUT_TEXT 3 486 #define VNC_MSG_SERVER_VMWARE_0 127 487 #define VNC_MSG_SERVER_CALL_CONTROL 249 488 #define VNC_MSG_SERVER_XVP 250 489 #define VNC_MSG_SERVER_TIGHT 252 490 #define VNC_MSG_SERVER_GII 253 491 #define VNC_MSG_SERVER_VMWARE_1 254 492 #define VNC_MSG_SERVER_QEMU 255 493 494 495 496 /* QEMU client -> server message IDs */ 497 #define VNC_MSG_CLIENT_QEMU_EXT_KEY_EVENT 0 498 #define VNC_MSG_CLIENT_QEMU_AUDIO 1 499 500 /* QEMU server -> client message IDs */ 501 #define VNC_MSG_SERVER_QEMU_AUDIO 1 502 503 504 505 /* QEMU client -> server audio message IDs */ 506 #define VNC_MSG_CLIENT_QEMU_AUDIO_ENABLE 0 507 #define VNC_MSG_CLIENT_QEMU_AUDIO_DISABLE 1 508 #define VNC_MSG_CLIENT_QEMU_AUDIO_SET_FORMAT 2 509 510 /* QEMU server -> client audio message IDs */ 511 #define VNC_MSG_SERVER_QEMU_AUDIO_END 0 512 #define VNC_MSG_SERVER_QEMU_AUDIO_BEGIN 1 513 #define VNC_MSG_SERVER_QEMU_AUDIO_DATA 2 514 515 516 /***************************************************************************** 517 * 518 * Internal APIs 519 * 520 *****************************************************************************/ 521 522 /* Event loop functions */ 523 gboolean vnc_client_io(QIOChannel *ioc, 524 GIOCondition condition, 525 void *opaque); 526 527 size_t vnc_client_read_buf(VncState *vs, uint8_t *data, size_t datalen); 528 size_t vnc_client_write_buf(VncState *vs, const uint8_t *data, size_t datalen); 529 530 /* Protocol I/O functions */ 531 void vnc_write(VncState *vs, const void *data, size_t len); 532 void vnc_write_u32(VncState *vs, uint32_t value); 533 void vnc_write_s32(VncState *vs, int32_t value); 534 void vnc_write_u16(VncState *vs, uint16_t value); 535 void vnc_write_u8(VncState *vs, uint8_t value); 536 void vnc_flush(VncState *vs); 537 void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting); 538 void vnc_disconnect_finish(VncState *vs); 539 void vnc_start_protocol(VncState *vs); 540 541 542 /* Buffer I/O functions */ 543 uint32_t read_u32(uint8_t *data, size_t offset); 544 545 /* Protocol stage functions */ 546 void vnc_client_error(VncState *vs); 547 size_t vnc_client_io_error(VncState *vs, ssize_t ret, Error **errp); 548 549 void start_client_init(VncState *vs); 550 void start_auth_vnc(VncState *vs); 551 552 553 /* Misc helpers */ 554 555 static inline uint32_t vnc_has_feature(VncState *vs, int feature) { 556 return (vs->features & (1 << feature)); 557 } 558 559 /* Framebuffer */ 560 void vnc_framebuffer_update(VncState *vs, int x, int y, int w, int h, 561 int32_t encoding); 562 563 /* server fb is in PIXMAN_x8r8g8b8 */ 564 #define VNC_SERVER_FB_FORMAT PIXMAN_FORMAT(32, PIXMAN_TYPE_ARGB, 0, 8, 8, 8) 565 #define VNC_SERVER_FB_BITS (PIXMAN_FORMAT_BPP(VNC_SERVER_FB_FORMAT)) 566 #define VNC_SERVER_FB_BYTES ((VNC_SERVER_FB_BITS+7)/8) 567 568 void *vnc_server_fb_ptr(VncDisplay *vd, int x, int y); 569 int vnc_server_fb_stride(VncDisplay *vd); 570 571 void vnc_convert_pixel(VncState *vs, uint8_t *buf, uint32_t v); 572 double vnc_update_freq(VncState *vs, int x, int y, int w, int h); 573 void vnc_sent_lossy_rect(VncState *vs, int x, int y, int w, int h); 574 575 /* Encodings */ 576 int vnc_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); 577 578 int vnc_raw_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); 579 580 int vnc_hextile_send_framebuffer_update(VncState *vs, int x, 581 int y, int w, int h); 582 void vnc_hextile_set_pixel_conversion(VncState *vs, int generic); 583 584 void *vnc_zlib_zalloc(void *x, unsigned items, unsigned size); 585 void vnc_zlib_zfree(void *x, void *addr); 586 int vnc_zlib_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); 587 void vnc_zlib_clear(VncState *vs); 588 589 int vnc_tight_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); 590 int vnc_tight_png_send_framebuffer_update(VncState *vs, int x, int y, 591 int w, int h); 592 void vnc_tight_clear(VncState *vs); 593 594 int vnc_zrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); 595 int vnc_zywrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); 596 void vnc_zrle_clear(VncState *vs); 597 598 #endif /* QEMU_VNC_H */ 599