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 "qapi/qapi-types-ui.h" 32 #include "qemu/queue.h" 33 #include "qemu/thread.h" 34 #include "ui/console.h" 35 #include "audio/audio.h" 36 #include "qemu/bitmap.h" 37 #include "crypto/tlssession.h" 38 #include "qemu/buffer.h" 39 #include "io/channel-socket.h" 40 #include "io/channel-tls.h" 41 #include "io/net-listener.h" 42 #include <zlib.h> 43 44 #include "keymaps.h" 45 #include "vnc-palette.h" 46 #include "vnc-enc-zrle.h" 47 #include "ui/kbd-state.h" 48 49 // #define _VNC_DEBUG 1 50 51 #ifdef _VNC_DEBUG 52 #define VNC_DEBUG(fmt, ...) do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) 53 #else 54 #define VNC_DEBUG(fmt, ...) do { } while (0) 55 #endif 56 57 /***************************************************************************** 58 * 59 * Core data structures 60 * 61 *****************************************************************************/ 62 63 typedef struct VncState VncState; 64 typedef struct VncJob VncJob; 65 typedef struct VncRect VncRect; 66 typedef struct VncRectEntry VncRectEntry; 67 68 typedef int VncReadEvent(VncState *vs, uint8_t *data, size_t len); 69 70 typedef void VncWritePixels(VncState *vs, void *data, int size); 71 72 typedef void VncSendHextileTile(VncState *vs, 73 int x, int y, int w, int h, 74 void *last_bg, 75 void *last_fg, 76 int *has_bg, int *has_fg); 77 78 /* VNC_DIRTY_PIXELS_PER_BIT is the number of dirty pixels represented 79 * by one bit in the dirty bitmap, should be a power of 2 */ 80 #define VNC_DIRTY_PIXELS_PER_BIT 16 81 82 /* VNC_MAX_WIDTH must be a multiple of VNC_DIRTY_PIXELS_PER_BIT. */ 83 84 #define VNC_MAX_WIDTH ROUND_UP(2560, VNC_DIRTY_PIXELS_PER_BIT) 85 #define VNC_MAX_HEIGHT 2048 86 87 /* VNC_DIRTY_BITS is the number of bits in the dirty bitmap. */ 88 #define VNC_DIRTY_BITS (VNC_MAX_WIDTH / VNC_DIRTY_PIXELS_PER_BIT) 89 90 /* VNC_DIRTY_BPL (BPL = bits per line) might be greater than 91 * VNC_DIRTY_BITS due to alignment */ 92 #define VNC_DIRTY_BPL(x) (sizeof((x)->dirty) / VNC_MAX_HEIGHT * BITS_PER_BYTE) 93 94 #define VNC_STAT_RECT 64 95 #define VNC_STAT_COLS (VNC_MAX_WIDTH / VNC_STAT_RECT) 96 #define VNC_STAT_ROWS (VNC_MAX_HEIGHT / VNC_STAT_RECT) 97 98 #define VNC_AUTH_CHALLENGE_SIZE 16 99 100 typedef struct VncDisplay VncDisplay; 101 102 #include "vnc-auth-vencrypt.h" 103 #ifdef CONFIG_VNC_SASL 104 #include "vnc-auth-sasl.h" 105 #endif 106 #include "vnc-ws.h" 107 108 struct VncRectStat 109 { 110 /* time of last 10 updates, to find update frequency */ 111 struct timeval times[10]; 112 int idx; 113 114 double freq; /* Update frequency (in Hz) */ 115 bool updated; /* Already updated during this refresh */ 116 }; 117 118 typedef struct VncRectStat VncRectStat; 119 120 struct VncSurface 121 { 122 struct timeval last_freq_check; 123 DECLARE_BITMAP(dirty[VNC_MAX_HEIGHT], 124 VNC_MAX_WIDTH / VNC_DIRTY_PIXELS_PER_BIT); 125 VncRectStat stats[VNC_STAT_ROWS][VNC_STAT_COLS]; 126 pixman_image_t *fb; 127 pixman_format_code_t format; 128 }; 129 130 typedef enum VncShareMode { 131 VNC_SHARE_MODE_CONNECTING = 1, 132 VNC_SHARE_MODE_SHARED, 133 VNC_SHARE_MODE_EXCLUSIVE, 134 VNC_SHARE_MODE_DISCONNECTED, 135 } VncShareMode; 136 137 typedef enum VncSharePolicy { 138 VNC_SHARE_POLICY_IGNORE = 1, 139 VNC_SHARE_POLICY_ALLOW_EXCLUSIVE, 140 VNC_SHARE_POLICY_FORCE_SHARED, 141 } VncSharePolicy; 142 143 struct VncDisplay 144 { 145 QTAILQ_HEAD(, VncState) clients; 146 int num_connecting; 147 int num_shared; 148 int num_exclusive; 149 int connections_limit; 150 VncSharePolicy share_policy; 151 QIONetListener *listener; 152 QIONetListener *wslistener; 153 DisplaySurface *ds; 154 DisplayChangeListener dcl; 155 kbd_layout_t *kbd_layout; 156 int lock_key_sync; 157 QEMUPutLEDEntry *led; 158 int ledstate; 159 QKbdState *kbd; 160 QemuMutex mutex; 161 162 QEMUCursor *cursor; 163 int cursor_msize; 164 uint8_t *cursor_mask; 165 166 struct VncSurface guest; /* guest visible surface (aka ds->surface) */ 167 pixman_image_t *server; /* vnc server surface */ 168 169 const char *id; 170 QTAILQ_ENTRY(VncDisplay) next; 171 bool is_unix; 172 char *password; 173 time_t expires; 174 int auth; 175 int subauth; /* Used by VeNCrypt */ 176 int ws_auth; /* Used by websockets */ 177 int ws_subauth; /* Used by websockets */ 178 bool lossy; 179 bool non_adaptive; 180 QCryptoTLSCreds *tlscreds; 181 char *tlsaclname; 182 #ifdef CONFIG_VNC_SASL 183 VncDisplaySASL sasl; 184 #endif 185 }; 186 187 typedef struct VncTight { 188 int type; 189 uint8_t quality; 190 uint8_t compression; 191 uint8_t pixel24; 192 Buffer tight; 193 Buffer tmp; 194 Buffer zlib; 195 Buffer gradient; 196 #ifdef CONFIG_VNC_JPEG 197 Buffer jpeg; 198 #endif 199 #ifdef CONFIG_VNC_PNG 200 Buffer png; 201 #endif 202 int levels[4]; 203 z_stream stream[4]; 204 } VncTight; 205 206 typedef struct VncHextile { 207 VncSendHextileTile *send_tile; 208 } VncHextile; 209 210 typedef struct VncZlib { 211 Buffer zlib; 212 Buffer tmp; 213 z_stream stream; 214 int level; 215 } VncZlib; 216 217 typedef struct VncZrle { 218 int type; 219 Buffer fb; 220 Buffer zrle; 221 Buffer tmp; 222 Buffer zlib; 223 z_stream stream; 224 VncPalette palette; 225 } VncZrle; 226 227 typedef struct VncZywrle { 228 int buf[VNC_ZRLE_TILE_WIDTH * VNC_ZRLE_TILE_HEIGHT]; 229 } VncZywrle; 230 231 struct VncRect 232 { 233 int x; 234 int y; 235 int w; 236 int h; 237 }; 238 239 struct VncRectEntry 240 { 241 struct VncRect rect; 242 QLIST_ENTRY(VncRectEntry) next; 243 }; 244 245 struct VncJob 246 { 247 VncState *vs; 248 249 QLIST_HEAD(, VncRectEntry) rectangles; 250 QTAILQ_ENTRY(VncJob) next; 251 }; 252 253 typedef enum { 254 VNC_STATE_UPDATE_NONE, 255 VNC_STATE_UPDATE_INCREMENTAL, 256 VNC_STATE_UPDATE_FORCE, 257 } VncStateUpdate; 258 259 #define VNC_MAGIC ((uint64_t)0x05b3f069b3d204bb) 260 261 struct VncState 262 { 263 uint64_t magic; 264 QIOChannelSocket *sioc; /* The underlying socket */ 265 QIOChannel *ioc; /* The channel currently used for I/O */ 266 guint ioc_tag; 267 gboolean disconnecting; 268 269 DECLARE_BITMAP(dirty[VNC_MAX_HEIGHT], VNC_DIRTY_BITS); 270 uint8_t **lossy_rect; /* Not an Array to avoid costly memcpy in 271 * vnc-jobs-async.c */ 272 273 VncDisplay *vd; 274 VncStateUpdate update; /* Most recent pending request from client */ 275 VncStateUpdate job_update; /* Currently processed by job thread */ 276 int has_dirty; 277 uint32_t features; 278 int absolute; 279 int last_x; 280 int last_y; 281 uint32_t last_bmask; 282 size_t client_width; /* limited to u16 by RFB proto */ 283 size_t client_height; /* limited to u16 by RFB proto */ 284 VncShareMode share_mode; 285 286 uint32_t vnc_encoding; 287 288 int major; 289 int minor; 290 291 int auth; 292 int subauth; /* Used by VeNCrypt */ 293 char challenge[VNC_AUTH_CHALLENGE_SIZE]; 294 QCryptoTLSSession *tls; /* Borrowed pointer from channel, don't free */ 295 #ifdef CONFIG_VNC_SASL 296 VncStateSASL sasl; 297 #endif 298 bool encode_ws; 299 bool websocket; 300 301 #ifdef CONFIG_VNC 302 VncClientInfo *info; 303 #endif 304 305 /* Job thread bottom half has put data for a forced update 306 * into the output buffer. This offset points to the end of 307 * the update data in the output buffer. This lets us determine 308 * when a force update is fully sent to the client, allowing 309 * us to process further forced updates. */ 310 size_t force_update_offset; 311 /* We allow multiple incremental updates or audio capture 312 * samples to be queued in output buffer, provided the 313 * buffer size doesn't exceed this threshold. The value 314 * is calculating dynamically based on framebuffer size 315 * and audio sample settings in vnc_update_throttle_offset() */ 316 size_t throttle_output_offset; 317 Buffer output; 318 Buffer input; 319 /* current output mode information */ 320 VncWritePixels *write_pixels; 321 PixelFormat client_pf; 322 pixman_format_code_t client_format; 323 bool client_be; 324 325 CaptureVoiceOut *audio_cap; 326 struct audsettings as; 327 328 VncReadEvent *read_handler; 329 size_t read_handler_expect; 330 331 bool abort; 332 QemuMutex output_mutex; 333 QEMUBH *bh; 334 Buffer jobs_buffer; 335 336 /* Encoding specific, if you add something here, don't forget to 337 * update vnc_async_encoding_start() 338 */ 339 VncTight tight; 340 VncZlib zlib; 341 VncHextile hextile; 342 VncZrle zrle; 343 VncZywrle zywrle; 344 345 Notifier mouse_mode_notifier; 346 347 QTAILQ_ENTRY(VncState) next; 348 }; 349 350 351 /***************************************************************************** 352 * 353 * Authentication modes 354 * 355 *****************************************************************************/ 356 357 enum { 358 VNC_AUTH_INVALID = 0, 359 VNC_AUTH_NONE = 1, 360 VNC_AUTH_VNC = 2, 361 VNC_AUTH_RA2 = 5, 362 VNC_AUTH_RA2NE = 6, 363 VNC_AUTH_TIGHT = 16, 364 VNC_AUTH_ULTRA = 17, 365 VNC_AUTH_TLS = 18, /* Supported in GTK-VNC & VINO */ 366 VNC_AUTH_VENCRYPT = 19, /* Supported in GTK-VNC & VeNCrypt */ 367 VNC_AUTH_SASL = 20, /* Supported in GTK-VNC & VINO */ 368 }; 369 370 enum { 371 VNC_AUTH_VENCRYPT_PLAIN = 256, 372 VNC_AUTH_VENCRYPT_TLSNONE = 257, 373 VNC_AUTH_VENCRYPT_TLSVNC = 258, 374 VNC_AUTH_VENCRYPT_TLSPLAIN = 259, 375 VNC_AUTH_VENCRYPT_X509NONE = 260, 376 VNC_AUTH_VENCRYPT_X509VNC = 261, 377 VNC_AUTH_VENCRYPT_X509PLAIN = 262, 378 VNC_AUTH_VENCRYPT_X509SASL = 263, 379 VNC_AUTH_VENCRYPT_TLSSASL = 264, 380 }; 381 382 383 /***************************************************************************** 384 * 385 * Encoding types 386 * 387 *****************************************************************************/ 388 389 #define VNC_ENCODING_RAW 0x00000000 390 #define VNC_ENCODING_COPYRECT 0x00000001 391 #define VNC_ENCODING_RRE 0x00000002 392 #define VNC_ENCODING_CORRE 0x00000004 393 #define VNC_ENCODING_HEXTILE 0x00000005 394 #define VNC_ENCODING_ZLIB 0x00000006 395 #define VNC_ENCODING_TIGHT 0x00000007 396 #define VNC_ENCODING_ZLIBHEX 0x00000008 397 #define VNC_ENCODING_TRLE 0x0000000f 398 #define VNC_ENCODING_ZRLE 0x00000010 399 #define VNC_ENCODING_ZYWRLE 0x00000011 400 #define VNC_ENCODING_COMPRESSLEVEL0 0xFFFFFF00 /* -256 */ 401 #define VNC_ENCODING_QUALITYLEVEL0 0xFFFFFFE0 /* -32 */ 402 #define VNC_ENCODING_XCURSOR 0xFFFFFF10 /* -240 */ 403 #define VNC_ENCODING_RICH_CURSOR 0xFFFFFF11 /* -239 */ 404 #define VNC_ENCODING_POINTER_POS 0xFFFFFF18 /* -232 */ 405 #define VNC_ENCODING_LASTRECT 0xFFFFFF20 /* -224 */ 406 #define VNC_ENCODING_DESKTOPRESIZE 0xFFFFFF21 /* -223 */ 407 #define VNC_ENCODING_POINTER_TYPE_CHANGE 0XFFFFFEFF /* -257 */ 408 #define VNC_ENCODING_EXT_KEY_EVENT 0XFFFFFEFE /* -258 */ 409 #define VNC_ENCODING_AUDIO 0XFFFFFEFD /* -259 */ 410 #define VNC_ENCODING_TIGHT_PNG 0xFFFFFEFC /* -260 */ 411 #define VNC_ENCODING_LED_STATE 0XFFFFFEFB /* -261 */ 412 #define VNC_ENCODING_WMVi 0x574D5669 413 414 /***************************************************************************** 415 * 416 * Other tight constants 417 * 418 *****************************************************************************/ 419 420 /* 421 * Vendors known by TightVNC: standard VNC/RealVNC, TridiaVNC, and TightVNC. 422 */ 423 424 #define VNC_TIGHT_CCB_RESET_MASK (0x0f) 425 #define VNC_TIGHT_CCB_TYPE_MASK (0x0f << 4) 426 #define VNC_TIGHT_CCB_TYPE_FILL (0x08 << 4) 427 #define VNC_TIGHT_CCB_TYPE_JPEG (0x09 << 4) 428 #define VNC_TIGHT_CCB_TYPE_PNG (0x0A << 4) 429 #define VNC_TIGHT_CCB_BASIC_MAX (0x07 << 4) 430 #define VNC_TIGHT_CCB_BASIC_ZLIB (0x03 << 4) 431 #define VNC_TIGHT_CCB_BASIC_FILTER (0x04 << 4) 432 433 /***************************************************************************** 434 * 435 * Features 436 * 437 *****************************************************************************/ 438 439 #define VNC_FEATURE_RESIZE 0 440 #define VNC_FEATURE_HEXTILE 1 441 #define VNC_FEATURE_POINTER_TYPE_CHANGE 2 442 #define VNC_FEATURE_WMVI 3 443 #define VNC_FEATURE_TIGHT 4 444 #define VNC_FEATURE_ZLIB 5 445 #define VNC_FEATURE_COPYRECT 6 446 #define VNC_FEATURE_RICH_CURSOR 7 447 #define VNC_FEATURE_TIGHT_PNG 8 448 #define VNC_FEATURE_ZRLE 9 449 #define VNC_FEATURE_ZYWRLE 10 450 #define VNC_FEATURE_LED_STATE 11 451 452 #define VNC_FEATURE_RESIZE_MASK (1 << VNC_FEATURE_RESIZE) 453 #define VNC_FEATURE_HEXTILE_MASK (1 << VNC_FEATURE_HEXTILE) 454 #define VNC_FEATURE_POINTER_TYPE_CHANGE_MASK (1 << VNC_FEATURE_POINTER_TYPE_CHANGE) 455 #define VNC_FEATURE_WMVI_MASK (1 << VNC_FEATURE_WMVI) 456 #define VNC_FEATURE_TIGHT_MASK (1 << VNC_FEATURE_TIGHT) 457 #define VNC_FEATURE_ZLIB_MASK (1 << VNC_FEATURE_ZLIB) 458 #define VNC_FEATURE_COPYRECT_MASK (1 << VNC_FEATURE_COPYRECT) 459 #define VNC_FEATURE_RICH_CURSOR_MASK (1 << VNC_FEATURE_RICH_CURSOR) 460 #define VNC_FEATURE_TIGHT_PNG_MASK (1 << VNC_FEATURE_TIGHT_PNG) 461 #define VNC_FEATURE_ZRLE_MASK (1 << VNC_FEATURE_ZRLE) 462 #define VNC_FEATURE_ZYWRLE_MASK (1 << VNC_FEATURE_ZYWRLE) 463 #define VNC_FEATURE_LED_STATE_MASK (1 << VNC_FEATURE_LED_STATE) 464 465 466 /* Client -> Server message IDs */ 467 #define VNC_MSG_CLIENT_SET_PIXEL_FORMAT 0 468 #define VNC_MSG_CLIENT_SET_ENCODINGS 2 469 #define VNC_MSG_CLIENT_FRAMEBUFFER_UPDATE_REQUEST 3 470 #define VNC_MSG_CLIENT_KEY_EVENT 4 471 #define VNC_MSG_CLIENT_POINTER_EVENT 5 472 #define VNC_MSG_CLIENT_CUT_TEXT 6 473 #define VNC_MSG_CLIENT_VMWARE_0 127 474 #define VNC_MSG_CLIENT_CALL_CONTROL 249 475 #define VNC_MSG_CLIENT_XVP 250 476 #define VNC_MSG_CLIENT_SET_DESKTOP_SIZE 251 477 #define VNC_MSG_CLIENT_TIGHT 252 478 #define VNC_MSG_CLIENT_GII 253 479 #define VNC_MSG_CLIENT_VMWARE_1 254 480 #define VNC_MSG_CLIENT_QEMU 255 481 482 /* Server -> Client message IDs */ 483 #define VNC_MSG_SERVER_FRAMEBUFFER_UPDATE 0 484 #define VNC_MSG_SERVER_SET_COLOUR_MAP_ENTRIES 1 485 #define VNC_MSG_SERVER_BELL 2 486 #define VNC_MSG_SERVER_CUT_TEXT 3 487 #define VNC_MSG_SERVER_VMWARE_0 127 488 #define VNC_MSG_SERVER_CALL_CONTROL 249 489 #define VNC_MSG_SERVER_XVP 250 490 #define VNC_MSG_SERVER_TIGHT 252 491 #define VNC_MSG_SERVER_GII 253 492 #define VNC_MSG_SERVER_VMWARE_1 254 493 #define VNC_MSG_SERVER_QEMU 255 494 495 496 497 /* QEMU client -> server message IDs */ 498 #define VNC_MSG_CLIENT_QEMU_EXT_KEY_EVENT 0 499 #define VNC_MSG_CLIENT_QEMU_AUDIO 1 500 501 /* QEMU server -> client message IDs */ 502 #define VNC_MSG_SERVER_QEMU_AUDIO 1 503 504 505 506 /* QEMU client -> server audio message IDs */ 507 #define VNC_MSG_CLIENT_QEMU_AUDIO_ENABLE 0 508 #define VNC_MSG_CLIENT_QEMU_AUDIO_DISABLE 1 509 #define VNC_MSG_CLIENT_QEMU_AUDIO_SET_FORMAT 2 510 511 /* QEMU server -> client audio message IDs */ 512 #define VNC_MSG_SERVER_QEMU_AUDIO_END 0 513 #define VNC_MSG_SERVER_QEMU_AUDIO_BEGIN 1 514 #define VNC_MSG_SERVER_QEMU_AUDIO_DATA 2 515 516 517 /***************************************************************************** 518 * 519 * Internal APIs 520 * 521 *****************************************************************************/ 522 523 /* Event loop functions */ 524 gboolean vnc_client_io(QIOChannel *ioc, 525 GIOCondition condition, 526 void *opaque); 527 528 size_t vnc_client_read_buf(VncState *vs, uint8_t *data, size_t datalen); 529 size_t vnc_client_write_buf(VncState *vs, const uint8_t *data, size_t datalen); 530 531 /* Protocol I/O functions */ 532 void vnc_write(VncState *vs, const void *data, size_t len); 533 void vnc_write_u32(VncState *vs, uint32_t value); 534 void vnc_write_s32(VncState *vs, int32_t value); 535 void vnc_write_u16(VncState *vs, uint16_t value); 536 void vnc_write_u8(VncState *vs, uint8_t value); 537 void vnc_flush(VncState *vs); 538 void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting); 539 void vnc_disconnect_finish(VncState *vs); 540 void vnc_start_protocol(VncState *vs); 541 542 543 /* Buffer I/O functions */ 544 uint32_t read_u32(uint8_t *data, size_t offset); 545 546 /* Protocol stage functions */ 547 void vnc_client_error(VncState *vs); 548 size_t vnc_client_io_error(VncState *vs, ssize_t ret, Error **errp); 549 550 void start_client_init(VncState *vs); 551 void start_auth_vnc(VncState *vs); 552 553 554 /* Misc helpers */ 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