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