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/queue.h" 31 #include "qemu/thread.h" 32 #include "ui/console.h" 33 #include "audio/audio.h" 34 #include "qemu/bitmap.h" 35 #include "crypto/tlssession.h" 36 #include "qemu/buffer.h" 37 #include "io/channel-socket.h" 38 #include "io/channel-tls.h" 39 #include "io/net-listener.h" 40 #include "authz/base.h" 41 #include <zlib.h> 42 43 #include "keymaps.h" 44 #include "vnc-palette.h" 45 #include "vnc-enc-zrle.h" 46 #include "ui/kbd-state.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 QKbdState *kbd; 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 QAuthZ *tlsauthz; 181 char *tlsauthzid; 182 #ifdef CONFIG_VNC_SASL 183 VncDisplaySASL sasl; 184 #endif 185 186 AudioState *audio_state; 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 #define VNC_MAGIC ((uint64_t)0x05b3f069b3d204bb) 262 263 struct VncState 264 { 265 uint64_t magic; 266 QIOChannelSocket *sioc; /* The underlying socket */ 267 QIOChannel *ioc; /* The channel currently used for I/O */ 268 guint ioc_tag; 269 gboolean disconnecting; 270 271 DECLARE_BITMAP(dirty[VNC_MAX_HEIGHT], VNC_DIRTY_BITS); 272 uint8_t **lossy_rect; /* Not an Array to avoid costly memcpy in 273 * vnc-jobs-async.c */ 274 275 VncDisplay *vd; 276 VncStateUpdate update; /* Most recent pending request from client */ 277 VncStateUpdate job_update; /* Currently processed by job thread */ 278 int has_dirty; 279 uint32_t features; 280 int absolute; 281 int last_x; 282 int last_y; 283 uint32_t last_bmask; 284 size_t client_width; /* limited to u16 by RFB proto */ 285 size_t client_height; /* limited to u16 by RFB proto */ 286 VncShareMode share_mode; 287 288 uint32_t vnc_encoding; 289 290 int major; 291 int minor; 292 293 int auth; 294 int subauth; /* Used by VeNCrypt */ 295 char challenge[VNC_AUTH_CHALLENGE_SIZE]; 296 QCryptoTLSSession *tls; /* Borrowed pointer from channel, don't free */ 297 #ifdef CONFIG_VNC_SASL 298 VncStateSASL sasl; 299 #endif 300 bool encode_ws; 301 bool websocket; 302 303 #ifdef CONFIG_VNC 304 VncClientInfo *info; 305 #endif 306 307 /* Job thread bottom half has put data for a forced update 308 * into the output buffer. This offset points to the end of 309 * the update data in the output buffer. This lets us determine 310 * when a force update is fully sent to the client, allowing 311 * us to process further forced updates. */ 312 size_t force_update_offset; 313 /* We allow multiple incremental updates or audio capture 314 * samples to be queued in output buffer, provided the 315 * buffer size doesn't exceed this threshold. The value 316 * is calculating dynamically based on framebuffer size 317 * and audio sample settings in vnc_update_throttle_offset() */ 318 size_t throttle_output_offset; 319 Buffer output; 320 Buffer input; 321 /* current output mode information */ 322 VncWritePixels *write_pixels; 323 PixelFormat client_pf; 324 pixman_format_code_t client_format; 325 bool client_be; 326 327 CaptureVoiceOut *audio_cap; 328 struct audsettings as; 329 330 VncReadEvent *read_handler; 331 size_t read_handler_expect; 332 333 bool abort; 334 QemuMutex output_mutex; 335 QEMUBH *bh; 336 Buffer jobs_buffer; 337 338 /* Encoding specific, if you add something here, don't forget to 339 * update vnc_async_encoding_start() 340 */ 341 VncTight *tight; 342 VncZlib zlib; 343 VncHextile hextile; 344 VncZrle *zrle; 345 VncZywrle zywrle; 346 347 Notifier mouse_mode_notifier; 348 349 QTAILQ_ENTRY(VncState) next; 350 }; 351 352 353 /***************************************************************************** 354 * 355 * Authentication modes 356 * 357 *****************************************************************************/ 358 359 enum { 360 VNC_AUTH_INVALID = 0, 361 VNC_AUTH_NONE = 1, 362 VNC_AUTH_VNC = 2, 363 VNC_AUTH_RA2 = 5, 364 VNC_AUTH_RA2NE = 6, 365 VNC_AUTH_TIGHT = 16, 366 VNC_AUTH_ULTRA = 17, 367 VNC_AUTH_TLS = 18, /* Supported in GTK-VNC & VINO */ 368 VNC_AUTH_VENCRYPT = 19, /* Supported in GTK-VNC & VeNCrypt */ 369 VNC_AUTH_SASL = 20, /* Supported in GTK-VNC & VINO */ 370 }; 371 372 enum { 373 VNC_AUTH_VENCRYPT_PLAIN = 256, 374 VNC_AUTH_VENCRYPT_TLSNONE = 257, 375 VNC_AUTH_VENCRYPT_TLSVNC = 258, 376 VNC_AUTH_VENCRYPT_TLSPLAIN = 259, 377 VNC_AUTH_VENCRYPT_X509NONE = 260, 378 VNC_AUTH_VENCRYPT_X509VNC = 261, 379 VNC_AUTH_VENCRYPT_X509PLAIN = 262, 380 VNC_AUTH_VENCRYPT_X509SASL = 263, 381 VNC_AUTH_VENCRYPT_TLSSASL = 264, 382 }; 383 384 385 /***************************************************************************** 386 * 387 * Encoding types 388 * 389 *****************************************************************************/ 390 391 #define VNC_ENCODING_RAW 0x00000000 392 #define VNC_ENCODING_COPYRECT 0x00000001 393 #define VNC_ENCODING_RRE 0x00000002 394 #define VNC_ENCODING_CORRE 0x00000004 395 #define VNC_ENCODING_HEXTILE 0x00000005 396 #define VNC_ENCODING_ZLIB 0x00000006 397 #define VNC_ENCODING_TIGHT 0x00000007 398 #define VNC_ENCODING_ZLIBHEX 0x00000008 399 #define VNC_ENCODING_TRLE 0x0000000f 400 #define VNC_ENCODING_ZRLE 0x00000010 401 #define VNC_ENCODING_ZYWRLE 0x00000011 402 #define VNC_ENCODING_COMPRESSLEVEL0 0xFFFFFF00 /* -256 */ 403 #define VNC_ENCODING_QUALITYLEVEL0 0xFFFFFFE0 /* -32 */ 404 #define VNC_ENCODING_XCURSOR 0xFFFFFF10 /* -240 */ 405 #define VNC_ENCODING_RICH_CURSOR 0xFFFFFF11 /* -239 */ 406 #define VNC_ENCODING_POINTER_POS 0xFFFFFF18 /* -232 */ 407 #define VNC_ENCODING_LASTRECT 0xFFFFFF20 /* -224 */ 408 #define VNC_ENCODING_DESKTOPRESIZE 0xFFFFFF21 /* -223 */ 409 #define VNC_ENCODING_POINTER_TYPE_CHANGE 0XFFFFFEFF /* -257 */ 410 #define VNC_ENCODING_EXT_KEY_EVENT 0XFFFFFEFE /* -258 */ 411 #define VNC_ENCODING_AUDIO 0XFFFFFEFD /* -259 */ 412 #define VNC_ENCODING_TIGHT_PNG 0xFFFFFEFC /* -260 */ 413 #define VNC_ENCODING_LED_STATE 0XFFFFFEFB /* -261 */ 414 #define VNC_ENCODING_WMVi 0x574D5669 415 416 /***************************************************************************** 417 * 418 * Other tight constants 419 * 420 *****************************************************************************/ 421 422 /* 423 * Vendors known by TightVNC: standard VNC/RealVNC, TridiaVNC, and TightVNC. 424 */ 425 426 #define VNC_TIGHT_CCB_RESET_MASK (0x0f) 427 #define VNC_TIGHT_CCB_TYPE_MASK (0x0f << 4) 428 #define VNC_TIGHT_CCB_TYPE_FILL (0x08 << 4) 429 #define VNC_TIGHT_CCB_TYPE_JPEG (0x09 << 4) 430 #define VNC_TIGHT_CCB_TYPE_PNG (0x0A << 4) 431 #define VNC_TIGHT_CCB_BASIC_MAX (0x07 << 4) 432 #define VNC_TIGHT_CCB_BASIC_ZLIB (0x03 << 4) 433 #define VNC_TIGHT_CCB_BASIC_FILTER (0x04 << 4) 434 435 /***************************************************************************** 436 * 437 * Features 438 * 439 *****************************************************************************/ 440 441 #define VNC_FEATURE_RESIZE 0 442 #define VNC_FEATURE_HEXTILE 1 443 #define VNC_FEATURE_POINTER_TYPE_CHANGE 2 444 #define VNC_FEATURE_WMVI 3 445 #define VNC_FEATURE_TIGHT 4 446 #define VNC_FEATURE_ZLIB 5 447 #define VNC_FEATURE_COPYRECT 6 448 #define VNC_FEATURE_RICH_CURSOR 7 449 #define VNC_FEATURE_TIGHT_PNG 8 450 #define VNC_FEATURE_ZRLE 9 451 #define VNC_FEATURE_ZYWRLE 10 452 #define VNC_FEATURE_LED_STATE 11 453 454 #define VNC_FEATURE_RESIZE_MASK (1 << VNC_FEATURE_RESIZE) 455 #define VNC_FEATURE_HEXTILE_MASK (1 << VNC_FEATURE_HEXTILE) 456 #define VNC_FEATURE_POINTER_TYPE_CHANGE_MASK (1 << VNC_FEATURE_POINTER_TYPE_CHANGE) 457 #define VNC_FEATURE_WMVI_MASK (1 << VNC_FEATURE_WMVI) 458 #define VNC_FEATURE_TIGHT_MASK (1 << VNC_FEATURE_TIGHT) 459 #define VNC_FEATURE_ZLIB_MASK (1 << VNC_FEATURE_ZLIB) 460 #define VNC_FEATURE_COPYRECT_MASK (1 << VNC_FEATURE_COPYRECT) 461 #define VNC_FEATURE_RICH_CURSOR_MASK (1 << VNC_FEATURE_RICH_CURSOR) 462 #define VNC_FEATURE_TIGHT_PNG_MASK (1 << VNC_FEATURE_TIGHT_PNG) 463 #define VNC_FEATURE_ZRLE_MASK (1 << VNC_FEATURE_ZRLE) 464 #define VNC_FEATURE_ZYWRLE_MASK (1 << VNC_FEATURE_ZYWRLE) 465 #define VNC_FEATURE_LED_STATE_MASK (1 << VNC_FEATURE_LED_STATE) 466 467 468 /* Client -> Server message IDs */ 469 #define VNC_MSG_CLIENT_SET_PIXEL_FORMAT 0 470 #define VNC_MSG_CLIENT_SET_ENCODINGS 2 471 #define VNC_MSG_CLIENT_FRAMEBUFFER_UPDATE_REQUEST 3 472 #define VNC_MSG_CLIENT_KEY_EVENT 4 473 #define VNC_MSG_CLIENT_POINTER_EVENT 5 474 #define VNC_MSG_CLIENT_CUT_TEXT 6 475 #define VNC_MSG_CLIENT_VMWARE_0 127 476 #define VNC_MSG_CLIENT_CALL_CONTROL 249 477 #define VNC_MSG_CLIENT_XVP 250 478 #define VNC_MSG_CLIENT_SET_DESKTOP_SIZE 251 479 #define VNC_MSG_CLIENT_TIGHT 252 480 #define VNC_MSG_CLIENT_GII 253 481 #define VNC_MSG_CLIENT_VMWARE_1 254 482 #define VNC_MSG_CLIENT_QEMU 255 483 484 /* Server -> Client message IDs */ 485 #define VNC_MSG_SERVER_FRAMEBUFFER_UPDATE 0 486 #define VNC_MSG_SERVER_SET_COLOUR_MAP_ENTRIES 1 487 #define VNC_MSG_SERVER_BELL 2 488 #define VNC_MSG_SERVER_CUT_TEXT 3 489 #define VNC_MSG_SERVER_VMWARE_0 127 490 #define VNC_MSG_SERVER_CALL_CONTROL 249 491 #define VNC_MSG_SERVER_XVP 250 492 #define VNC_MSG_SERVER_TIGHT 252 493 #define VNC_MSG_SERVER_GII 253 494 #define VNC_MSG_SERVER_VMWARE_1 254 495 #define VNC_MSG_SERVER_QEMU 255 496 497 498 499 /* QEMU client -> server message IDs */ 500 #define VNC_MSG_CLIENT_QEMU_EXT_KEY_EVENT 0 501 #define VNC_MSG_CLIENT_QEMU_AUDIO 1 502 503 /* QEMU server -> client message IDs */ 504 #define VNC_MSG_SERVER_QEMU_AUDIO 1 505 506 507 508 /* QEMU client -> server audio message IDs */ 509 #define VNC_MSG_CLIENT_QEMU_AUDIO_ENABLE 0 510 #define VNC_MSG_CLIENT_QEMU_AUDIO_DISABLE 1 511 #define VNC_MSG_CLIENT_QEMU_AUDIO_SET_FORMAT 2 512 513 /* QEMU server -> client audio message IDs */ 514 #define VNC_MSG_SERVER_QEMU_AUDIO_END 0 515 #define VNC_MSG_SERVER_QEMU_AUDIO_BEGIN 1 516 #define VNC_MSG_SERVER_QEMU_AUDIO_DATA 2 517 518 519 /***************************************************************************** 520 * 521 * Internal APIs 522 * 523 *****************************************************************************/ 524 525 /* Event loop functions */ 526 gboolean vnc_client_io(QIOChannel *ioc, 527 GIOCondition condition, 528 void *opaque); 529 530 size_t vnc_client_read_buf(VncState *vs, uint8_t *data, size_t datalen); 531 size_t vnc_client_write_buf(VncState *vs, const uint8_t *data, size_t datalen); 532 533 /* Protocol I/O functions */ 534 void vnc_write(VncState *vs, const void *data, size_t len); 535 void vnc_write_u32(VncState *vs, uint32_t value); 536 void vnc_write_s32(VncState *vs, int32_t value); 537 void vnc_write_u16(VncState *vs, uint16_t value); 538 void vnc_write_u8(VncState *vs, uint8_t value); 539 void vnc_flush(VncState *vs); 540 void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting); 541 void vnc_disconnect_finish(VncState *vs); 542 void vnc_start_protocol(VncState *vs); 543 544 545 /* Buffer I/O functions */ 546 uint32_t read_u32(uint8_t *data, size_t offset); 547 548 /* Protocol stage functions */ 549 void vnc_client_error(VncState *vs); 550 size_t vnc_client_io_error(VncState *vs, ssize_t ret, Error **errp); 551 552 void start_client_init(VncState *vs); 553 void start_auth_vnc(VncState *vs); 554 555 556 /* Misc helpers */ 557 558 static inline uint32_t vnc_has_feature(VncState *vs, int feature) { 559 return (vs->features & (1 << feature)); 560 } 561 562 /* Framebuffer */ 563 void vnc_framebuffer_update(VncState *vs, int x, int y, int w, int h, 564 int32_t encoding); 565 566 /* server fb is in PIXMAN_x8r8g8b8 */ 567 #define VNC_SERVER_FB_FORMAT PIXMAN_FORMAT(32, PIXMAN_TYPE_ARGB, 0, 8, 8, 8) 568 #define VNC_SERVER_FB_BITS (PIXMAN_FORMAT_BPP(VNC_SERVER_FB_FORMAT)) 569 #define VNC_SERVER_FB_BYTES ((VNC_SERVER_FB_BITS+7)/8) 570 571 void *vnc_server_fb_ptr(VncDisplay *vd, int x, int y); 572 int vnc_server_fb_stride(VncDisplay *vd); 573 574 void vnc_convert_pixel(VncState *vs, uint8_t *buf, uint32_t v); 575 double vnc_update_freq(VncState *vs, int x, int y, int w, int h); 576 void vnc_sent_lossy_rect(VncState *vs, int x, int y, int w, int h); 577 578 /* Encodings */ 579 int vnc_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); 580 581 int vnc_raw_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); 582 583 int vnc_hextile_send_framebuffer_update(VncState *vs, int x, 584 int y, int w, int h); 585 void vnc_hextile_set_pixel_conversion(VncState *vs, int generic); 586 587 void *vnc_zlib_zalloc(void *x, unsigned items, unsigned size); 588 void vnc_zlib_zfree(void *x, void *addr); 589 int vnc_zlib_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); 590 void vnc_zlib_clear(VncState *vs); 591 592 int vnc_tight_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); 593 int vnc_tight_png_send_framebuffer_update(VncState *vs, int x, int y, 594 int w, int h); 595 void vnc_tight_clear(VncState *vs); 596 597 int vnc_zrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); 598 int vnc_zywrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); 599 void vnc_zrle_clear(VncState *vs); 600 601 #endif /* QEMU_VNC_H */ 602