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 <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
  60typedef struct VncState VncState;
  61typedef struct VncJob VncJob;
  62typedef struct VncRect VncRect;
  63typedef struct VncRectEntry VncRectEntry;
  64
  65typedef int VncReadEvent(VncState *vs, uint8_t *data, size_t len);
  66
  67typedef void VncWritePixels(VncState *vs, void *data, int size);
  68
  69typedef 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
  97typedef 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
 105struct 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
 115typedef struct VncRectStat VncRectStat;
 116
 117struct 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
 127typedef 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
 134typedef enum VncSharePolicy {
 135    VNC_SHARE_POLICY_IGNORE = 1,
 136    VNC_SHARE_POLICY_ALLOW_EXCLUSIVE,
 137    VNC_SHARE_POLICY_FORCE_SHARED,
 138} VncSharePolicy;
 139
 140struct 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
 183typedef 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
 202typedef struct VncHextile {
 203    VncSendHextileTile *send_tile;
 204} VncHextile;
 205
 206typedef struct VncZlib {
 207    Buffer zlib;
 208    Buffer tmp;
 209    z_stream stream;
 210    int level;
 211} VncZlib;
 212
 213typedef 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
 223typedef struct VncZywrle {
 224    int buf[VNC_ZRLE_TILE_WIDTH * VNC_ZRLE_TILE_HEIGHT];
 225} VncZywrle;
 226
 227struct VncRect
 228{
 229    int x;
 230    int y;
 231    int w;
 232    int h;
 233};
 234
 235struct VncRectEntry
 236{
 237    struct VncRect rect;
 238    QLIST_ENTRY(VncRectEntry) next;
 239};
 240
 241struct VncJob
 242{
 243    VncState *vs;
 244
 245    QLIST_HEAD(, VncRectEntry) rectangles;
 246    QTAILQ_ENTRY(VncJob) next;
 247};
 248
 249struct 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
 335enum {
 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
 348enum {
 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 */
 502void vnc_client_read(void *opaque);
 503void vnc_client_write(void *opaque);
 504
 505ssize_t vnc_client_read_buf(VncState *vs, uint8_t *data, size_t datalen);
 506ssize_t vnc_client_write_buf(VncState *vs, const uint8_t *data, size_t datalen);
 507ssize_t vnc_tls_pull(char *buf, size_t len, void *opaque);
 508ssize_t vnc_tls_push(const char *buf, size_t len, void *opaque);
 509
 510/* Protocol I/O functions */
 511void vnc_write(VncState *vs, const void *data, size_t len);
 512void vnc_write_u32(VncState *vs, uint32_t value);
 513void vnc_write_s32(VncState *vs, int32_t value);
 514void vnc_write_u16(VncState *vs, uint16_t value);
 515void vnc_write_u8(VncState *vs, uint8_t value);
 516void vnc_flush(VncState *vs);
 517void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting);
 518void vnc_disconnect_finish(VncState *vs);
 519void vnc_init_state(VncState *vs);
 520
 521
 522/* Buffer I/O functions */
 523uint32_t read_u32(uint8_t *data, size_t offset);
 524
 525/* Protocol stage functions */
 526void vnc_client_error(VncState *vs);
 527ssize_t vnc_client_io_error(VncState *vs, ssize_t ret, int last_errno);
 528
 529void start_client_init(VncState *vs);
 530void start_auth_vnc(VncState *vs);
 531
 532
 533/* Misc helpers */
 534
 535char *vnc_socket_local_addr(const char *format, int fd);
 536char *vnc_socket_remote_addr(const char *format, int fd);
 537
 538static inline uint32_t vnc_has_feature(VncState *vs, int feature) {
 539    return (vs->features & (1 << feature));
 540}
 541
 542/* Framebuffer */
 543void 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
 551void *vnc_server_fb_ptr(VncDisplay *vd, int x, int y);
 552int vnc_server_fb_stride(VncDisplay *vd);
 553
 554void vnc_convert_pixel(VncState *vs, uint8_t *buf, uint32_t v);
 555double vnc_update_freq(VncState *vs, int x, int y, int w, int h);
 556void vnc_sent_lossy_rect(VncState *vs, int x, int y, int w, int h);
 557
 558/* Encodings */
 559int vnc_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 560
 561int vnc_raw_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 562
 563int vnc_hextile_send_framebuffer_update(VncState *vs, int x,
 564                                         int y, int w, int h);
 565void vnc_hextile_set_pixel_conversion(VncState *vs, int generic);
 566
 567void *vnc_zlib_zalloc(void *x, unsigned items, unsigned size);
 568void vnc_zlib_zfree(void *x, void *addr);
 569int vnc_zlib_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 570void vnc_zlib_clear(VncState *vs);
 571
 572int vnc_tight_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 573int vnc_tight_png_send_framebuffer_update(VncState *vs, int x, int y,
 574                                          int w, int h);
 575void vnc_tight_clear(VncState *vs);
 576
 577int vnc_zrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 578int vnc_zywrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 579void vnc_zrle_clear(VncState *vs);
 580
 581#endif /* __QEMU_VNC_H */
 582