ui/vnc.h

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