LXR qemu/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 "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
  61typedef struct VncState VncState;
  62typedef struct VncJob VncJob;
  63typedef struct VncRect VncRect;
  64typedef struct VncRectEntry VncRectEntry;
  65
  66typedef int VncReadEvent(VncState *vs, uint8_t *data, size_t len);
  67
  68typedef void VncWritePixels(VncState *vs, void *data, int size);
  69
  70typedef 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
  98typedef 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
 106struct 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
 116typedef struct VncRectStat VncRectStat;
 117
 118struct 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
 128typedef 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
 135typedef enum VncSharePolicy {
 136    VNC_SHARE_POLICY_IGNORE = 1,
 137    VNC_SHARE_POLICY_ALLOW_EXCLUSIVE,
 138    VNC_SHARE_POLICY_FORCE_SHARED,
 139} VncSharePolicy;
 140
 141struct 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    QIOChannelSocket *lsock;
 150    guint lsock_tag;
 151    QIOChannelSocket *lwebsock;
 152    guint lwebsock_tag;
 153    bool ws_enabled;
 154    DisplaySurface *ds;
 155    DisplayChangeListener dcl;
 156    kbd_layout_t *kbd_layout;
 157    int lock_key_sync;
 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 enabled;
 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    bool ws_tls; /* 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
 187typedef 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
 206typedef struct VncHextile {
 207    VncSendHextileTile *send_tile;
 208} VncHextile;
 209
 210typedef struct VncZlib {
 211    Buffer zlib;
 212    Buffer tmp;
 213    z_stream stream;
 214    int level;
 215} VncZlib;
 216
 217typedef 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
 227typedef struct VncZywrle {
 228    int buf[VNC_ZRLE_TILE_WIDTH * VNC_ZRLE_TILE_HEIGHT];
 229} VncZywrle;
 230
 231struct VncRect
 232{
 233    int x;
 234    int y;
 235    int w;
 236    int h;
 237};
 238
 239struct VncRectEntry
 240{
 241    struct VncRect rect;
 242    QLIST_ENTRY(VncRectEntry) next;
 243};
 244
 245struct VncJob
 246{
 247    VncState *vs;
 248
 249    QLIST_HEAD(, VncRectEntry) rectangles;
 250    QTAILQ_ENTRY(VncJob) next;
 251};
 252
 253struct VncState
 254{
 255    QIOChannelSocket *sioc; /* The underlying socket */
 256    QIOChannel *ioc; /* The channel currently used for I/O */
 257    guint ioc_tag;
 258    gboolean disconnecting;
 259
 260    DECLARE_BITMAP(dirty[VNC_MAX_HEIGHT], VNC_DIRTY_BITS);
 261    uint8_t **lossy_rect; /* Not an Array to avoid costly memcpy in
 262                           * vnc-jobs-async.c */
 263
 264    VncDisplay *vd;
 265    int need_update;
 266    int force_update;
 267    int has_dirty;
 268    uint32_t features;
 269    int absolute;
 270    int last_x;
 271    int last_y;
 272    uint32_t last_bmask;
 273    int client_width;
 274    int client_height;
 275    VncShareMode share_mode;
 276
 277    uint32_t vnc_encoding;
 278
 279    int major;
 280    int minor;
 281
 282    int auth;
 283    int subauth; /* Used by VeNCrypt */
 284    char challenge[VNC_AUTH_CHALLENGE_SIZE];
 285    QCryptoTLSSession *tls; /* Borrowed pointer from channel, don't free */
 286#ifdef CONFIG_VNC_SASL
 287    VncStateSASL sasl;
 288#endif
 289    bool encode_ws;
 290    bool websocket;
 291
 292    VncClientInfo *info;
 293
 294    Buffer output;
 295    Buffer input;
 296    /* current output mode information */
 297    VncWritePixels *write_pixels;
 298    PixelFormat client_pf;
 299    pixman_format_code_t client_format;
 300    bool client_be;
 301
 302    CaptureVoiceOut *audio_cap;
 303    struct audsettings as;
 304
 305    VncReadEvent *read_handler;
 306    size_t read_handler_expect;
 307    /* input */
 308    uint8_t modifiers_state[256];
 309    QEMUPutLEDEntry *led;
 310
 311    bool abort;
 312    bool initialized;
 313    QemuMutex output_mutex;
 314    QEMUBH *bh;
 315    Buffer jobs_buffer;
 316
 317    /* Encoding specific, if you add something here, don't forget to
 318     *  update vnc_async_encoding_start()
 319     */
 320    VncTight tight;
 321    VncZlib zlib;
 322    VncHextile hextile;
 323    VncZrle zrle;
 324    VncZywrle zywrle;
 325
 326    Notifier mouse_mode_notifier;
 327
 328    QTAILQ_ENTRY(VncState) next;
 329};
 330
 331
 332/*****************************************************************************
 333 *
 334 * Authentication modes
 335 *
 336 *****************************************************************************/
 337
 338enum {
 339    VNC_AUTH_INVALID = 0,
 340    VNC_AUTH_NONE = 1,
 341    VNC_AUTH_VNC = 2,
 342    VNC_AUTH_RA2 = 5,
 343    VNC_AUTH_RA2NE = 6,
 344    VNC_AUTH_TIGHT = 16,
 345    VNC_AUTH_ULTRA = 17,
 346    VNC_AUTH_TLS = 18,      /* Supported in GTK-VNC & VINO */
 347    VNC_AUTH_VENCRYPT = 19, /* Supported in GTK-VNC & VeNCrypt */
 348    VNC_AUTH_SASL = 20,     /* Supported in GTK-VNC & VINO */
 349};
 350
 351enum {
 352    VNC_AUTH_VENCRYPT_PLAIN = 256,
 353    VNC_AUTH_VENCRYPT_TLSNONE = 257,
 354    VNC_AUTH_VENCRYPT_TLSVNC = 258,
 355    VNC_AUTH_VENCRYPT_TLSPLAIN = 259,
 356    VNC_AUTH_VENCRYPT_X509NONE = 260,
 357    VNC_AUTH_VENCRYPT_X509VNC = 261,
 358    VNC_AUTH_VENCRYPT_X509PLAIN = 262,
 359    VNC_AUTH_VENCRYPT_X509SASL = 263,
 360    VNC_AUTH_VENCRYPT_TLSSASL = 264,
 361};
 362
 363
 364/*****************************************************************************
 365 *
 366 * Encoding types
 367 *
 368 *****************************************************************************/
 369
 370#define VNC_ENCODING_RAW                  0x00000000
 371#define VNC_ENCODING_COPYRECT             0x00000001
 372#define VNC_ENCODING_RRE                  0x00000002
 373#define VNC_ENCODING_CORRE                0x00000004
 374#define VNC_ENCODING_HEXTILE              0x00000005
 375#define VNC_ENCODING_ZLIB                 0x00000006
 376#define VNC_ENCODING_TIGHT                0x00000007
 377#define VNC_ENCODING_ZLIBHEX              0x00000008
 378#define VNC_ENCODING_TRLE                 0x0000000f
 379#define VNC_ENCODING_ZRLE                 0x00000010
 380#define VNC_ENCODING_ZYWRLE               0x00000011
 381#define VNC_ENCODING_COMPRESSLEVEL0       0xFFFFFF00 /* -256 */
 382#define VNC_ENCODING_QUALITYLEVEL0        0xFFFFFFE0 /* -32  */
 383#define VNC_ENCODING_XCURSOR              0xFFFFFF10 /* -240 */
 384#define VNC_ENCODING_RICH_CURSOR          0xFFFFFF11 /* -239 */
 385#define VNC_ENCODING_POINTER_POS          0xFFFFFF18 /* -232 */
 386#define VNC_ENCODING_LASTRECT             0xFFFFFF20 /* -224 */
 387#define VNC_ENCODING_DESKTOPRESIZE        0xFFFFFF21 /* -223 */
 388#define VNC_ENCODING_POINTER_TYPE_CHANGE  0XFFFFFEFF /* -257 */
 389#define VNC_ENCODING_EXT_KEY_EVENT        0XFFFFFEFE /* -258 */
 390#define VNC_ENCODING_AUDIO                0XFFFFFEFD /* -259 */
 391#define VNC_ENCODING_TIGHT_PNG            0xFFFFFEFC /* -260 */
 392#define VNC_ENCODING_LED_STATE            0XFFFFFEFB /* -261 */
 393#define VNC_ENCODING_WMVi                 0x574D5669
 394
 395/*****************************************************************************
 396 *
 397 * Other tight constants
 398 *
 399 *****************************************************************************/
 400
 401/*
 402 * Vendors known by TightVNC: standard VNC/RealVNC, TridiaVNC, and TightVNC.
 403 */
 404
 405#define VNC_TIGHT_CCB_RESET_MASK   (0x0f)
 406#define VNC_TIGHT_CCB_TYPE_MASK    (0x0f << 4)
 407#define VNC_TIGHT_CCB_TYPE_FILL    (0x08 << 4)
 408#define VNC_TIGHT_CCB_TYPE_JPEG    (0x09 << 4)
 409#define VNC_TIGHT_CCB_TYPE_PNG     (0x0A << 4)
 410#define VNC_TIGHT_CCB_BASIC_MAX    (0x07 << 4)
 411#define VNC_TIGHT_CCB_BASIC_ZLIB   (0x03 << 4)
 412#define VNC_TIGHT_CCB_BASIC_FILTER (0x04 << 4)
 413
 414/*****************************************************************************
 415 *
 416 * Features
 417 *
 418 *****************************************************************************/
 419
 420#define VNC_FEATURE_RESIZE                   0
 421#define VNC_FEATURE_HEXTILE                  1
 422#define VNC_FEATURE_POINTER_TYPE_CHANGE      2
 423#define VNC_FEATURE_WMVI                     3
 424#define VNC_FEATURE_TIGHT                    4
 425#define VNC_FEATURE_ZLIB                     5
 426#define VNC_FEATURE_COPYRECT                 6
 427#define VNC_FEATURE_RICH_CURSOR              7
 428#define VNC_FEATURE_TIGHT_PNG                8
 429#define VNC_FEATURE_ZRLE                     9
 430#define VNC_FEATURE_ZYWRLE                  10
 431#define VNC_FEATURE_LED_STATE               11
 432
 433#define VNC_FEATURE_RESIZE_MASK              (1 << VNC_FEATURE_RESIZE)
 434#define VNC_FEATURE_HEXTILE_MASK             (1 << VNC_FEATURE_HEXTILE)
 435#define VNC_FEATURE_POINTER_TYPE_CHANGE_MASK (1 << VNC_FEATURE_POINTER_TYPE_CHANGE)
 436#define VNC_FEATURE_WMVI_MASK                (1 << VNC_FEATURE_WMVI)
 437#define VNC_FEATURE_TIGHT_MASK               (1 << VNC_FEATURE_TIGHT)
 438#define VNC_FEATURE_ZLIB_MASK                (1 << VNC_FEATURE_ZLIB)
 439#define VNC_FEATURE_COPYRECT_MASK            (1 << VNC_FEATURE_COPYRECT)
 440#define VNC_FEATURE_RICH_CURSOR_MASK         (1 << VNC_FEATURE_RICH_CURSOR)
 441#define VNC_FEATURE_TIGHT_PNG_MASK           (1 << VNC_FEATURE_TIGHT_PNG)
 442#define VNC_FEATURE_ZRLE_MASK                (1 << VNC_FEATURE_ZRLE)
 443#define VNC_FEATURE_ZYWRLE_MASK              (1 << VNC_FEATURE_ZYWRLE)
 444#define VNC_FEATURE_LED_STATE_MASK           (1 << VNC_FEATURE_LED_STATE)
 445
 446
 447/* Client -> Server message IDs */
 448#define VNC_MSG_CLIENT_SET_PIXEL_FORMAT           0
 449#define VNC_MSG_CLIENT_SET_ENCODINGS              2
 450#define VNC_MSG_CLIENT_FRAMEBUFFER_UPDATE_REQUEST 3
 451#define VNC_MSG_CLIENT_KEY_EVENT                  4
 452#define VNC_MSG_CLIENT_POINTER_EVENT              5
 453#define VNC_MSG_CLIENT_CUT_TEXT                   6
 454#define VNC_MSG_CLIENT_VMWARE_0                   127
 455#define VNC_MSG_CLIENT_CALL_CONTROL               249
 456#define VNC_MSG_CLIENT_XVP                        250
 457#define VNC_MSG_CLIENT_SET_DESKTOP_SIZE           251
 458#define VNC_MSG_CLIENT_TIGHT                      252
 459#define VNC_MSG_CLIENT_GII                        253
 460#define VNC_MSG_CLIENT_VMWARE_1                   254
 461#define VNC_MSG_CLIENT_QEMU                       255
 462
 463/* Server -> Client message IDs */
 464#define VNC_MSG_SERVER_FRAMEBUFFER_UPDATE         0
 465#define VNC_MSG_SERVER_SET_COLOUR_MAP_ENTRIES     1
 466#define VNC_MSG_SERVER_BELL                       2
 467#define VNC_MSG_SERVER_CUT_TEXT                   3
 468#define VNC_MSG_SERVER_VMWARE_0                   127
 469#define VNC_MSG_SERVER_CALL_CONTROL               249
 470#define VNC_MSG_SERVER_XVP                        250
 471#define VNC_MSG_SERVER_TIGHT                      252
 472#define VNC_MSG_SERVER_GII                        253
 473#define VNC_MSG_SERVER_VMWARE_1                   254
 474#define VNC_MSG_SERVER_QEMU                       255
 475
 476
 477
 478/* QEMU client -> server message IDs */
 479#define VNC_MSG_CLIENT_QEMU_EXT_KEY_EVENT         0
 480#define VNC_MSG_CLIENT_QEMU_AUDIO                 1
 481
 482/* QEMU server -> client message IDs */
 483#define VNC_MSG_SERVER_QEMU_AUDIO                 1
 484
 485
 486
 487/* QEMU client -> server audio message IDs */
 488#define VNC_MSG_CLIENT_QEMU_AUDIO_ENABLE          0
 489#define VNC_MSG_CLIENT_QEMU_AUDIO_DISABLE         1
 490#define VNC_MSG_CLIENT_QEMU_AUDIO_SET_FORMAT      2
 491
 492/* QEMU server -> client audio message IDs */
 493#define VNC_MSG_SERVER_QEMU_AUDIO_END             0
 494#define VNC_MSG_SERVER_QEMU_AUDIO_BEGIN           1
 495#define VNC_MSG_SERVER_QEMU_AUDIO_DATA            2
 496
 497
 498/*****************************************************************************
 499 *
 500 * Internal APIs
 501 *
 502 *****************************************************************************/
 503
 504/* Event loop functions */
 505gboolean vnc_client_io(QIOChannel *ioc,
 506                       GIOCondition condition,
 507                       void *opaque);
 508
 509ssize_t vnc_client_read_buf(VncState *vs, uint8_t *data, size_t datalen);
 510ssize_t vnc_client_write_buf(VncState *vs, const uint8_t *data, size_t datalen);
 511
 512/* Protocol I/O functions */
 513void vnc_write(VncState *vs, const void *data, size_t len);
 514void vnc_write_u32(VncState *vs, uint32_t value);
 515void vnc_write_s32(VncState *vs, int32_t value);
 516void vnc_write_u16(VncState *vs, uint16_t value);
 517void vnc_write_u8(VncState *vs, uint8_t value);
 518void vnc_flush(VncState *vs);
 519void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting);
 520void vnc_disconnect_finish(VncState *vs);
 521void vnc_init_state(VncState *vs);
 522
 523
 524/* Buffer I/O functions */
 525uint32_t read_u32(uint8_t *data, size_t offset);
 526
 527/* Protocol stage functions */
 528void vnc_client_error(VncState *vs);
 529ssize_t vnc_client_io_error(VncState *vs, ssize_t ret, Error **errp);
 530
 531void start_client_init(VncState *vs);
 532void start_auth_vnc(VncState *vs);
 533
 534
 535/* Misc helpers */
 536
 537static inline uint32_t vnc_has_feature(VncState *vs, int feature) {
 538    return (vs->features & (1 << feature));
 539}
 540
 541/* Framebuffer */
 542void vnc_framebuffer_update(VncState *vs, int x, int y, int w, int h,
 543                            int32_t encoding);
 544
 545/* server fb is in PIXMAN_x8r8g8b8 */
 546#define VNC_SERVER_FB_FORMAT PIXMAN_FORMAT(32, PIXMAN_TYPE_ARGB, 0, 8, 8, 8)
 547#define VNC_SERVER_FB_BITS   (PIXMAN_FORMAT_BPP(VNC_SERVER_FB_FORMAT))
 548#define VNC_SERVER_FB_BYTES  ((VNC_SERVER_FB_BITS+7)/8)
 549
 550void *vnc_server_fb_ptr(VncDisplay *vd, int x, int y);
 551int vnc_server_fb_stride(VncDisplay *vd);
 552
 553void vnc_convert_pixel(VncState *vs, uint8_t *buf, uint32_t v);
 554double vnc_update_freq(VncState *vs, int x, int y, int w, int h);
 555void vnc_sent_lossy_rect(VncState *vs, int x, int y, int w, int h);
 556
 557/* Encodings */
 558int vnc_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 559
 560int vnc_raw_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 561
 562int vnc_hextile_send_framebuffer_update(VncState *vs, int x,
 563                                         int y, int w, int h);
 564void vnc_hextile_set_pixel_conversion(VncState *vs, int generic);
 565
 566void *vnc_zlib_zalloc(void *x, unsigned items, unsigned size);
 567void vnc_zlib_zfree(void *x, void *addr);
 568int vnc_zlib_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 569void vnc_zlib_clear(VncState *vs);
 570
 571int vnc_tight_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 572int vnc_tight_png_send_framebuffer_update(VncState *vs, int x, int y,
 573                                          int w, int h);
 574void vnc_tight_clear(VncState *vs);
 575
 576int vnc_zrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 577int vnc_zywrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 578void vnc_zrle_clear(VncState *vs);
 579
 580#endif /* QEMU_VNC_H */
 581