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 "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
  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
  62typedef struct VncState VncState;
  63typedef struct VncJob VncJob;
  64typedef struct VncRect VncRect;
  65typedef struct VncRectEntry VncRectEntry;
  66
  67typedef int VncReadEvent(VncState *vs, uint8_t *data, size_t len);
  68
  69typedef void VncWritePixels(VncState *vs, void *data, int size);
  70
  71typedef 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
  99typedef 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
 107struct 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
 117typedef struct VncRectStat VncRectStat;
 118
 119struct 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
 129typedef 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
 136typedef enum VncSharePolicy {
 137    VNC_SHARE_POLICY_IGNORE = 1,
 138    VNC_SHARE_POLICY_ALLOW_EXCLUSIVE,
 139    VNC_SHARE_POLICY_FORCE_SHARED,
 140} VncSharePolicy;
 141
 142struct 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    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 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    char *tlsaclname;
 181#ifdef CONFIG_VNC_SASL
 182    VncDisplaySASL sasl;
 183#endif
 184};
 185
 186typedef struct VncTight {
 187    int type;
 188    uint8_t quality;
 189    uint8_t compression;
 190    uint8_t pixel24;
 191    Buffer tight;
 192    Buffer tmp;
 193    Buffer zlib;
 194    Buffer gradient;
 195#ifdef CONFIG_VNC_JPEG
 196    Buffer jpeg;
 197#endif
 198#ifdef CONFIG_VNC_PNG
 199    Buffer png;
 200#endif
 201    int levels[4];
 202    z_stream stream[4];
 203} VncTight;
 204
 205typedef struct VncHextile {
 206    VncSendHextileTile *send_tile;
 207} VncHextile;
 208
 209typedef struct VncZlib {
 210    Buffer zlib;
 211    Buffer tmp;
 212    z_stream stream;
 213    int level;
 214} VncZlib;
 215
 216typedef struct VncZrle {
 217    int type;
 218    Buffer fb;
 219    Buffer zrle;
 220    Buffer tmp;
 221    Buffer zlib;
 222    z_stream stream;
 223    VncPalette palette;
 224} VncZrle;
 225
 226typedef struct VncZywrle {
 227    int buf[VNC_ZRLE_TILE_WIDTH * VNC_ZRLE_TILE_HEIGHT];
 228} VncZywrle;
 229
 230struct VncRect
 231{
 232    int x;
 233    int y;
 234    int w;
 235    int h;
 236};
 237
 238struct VncRectEntry
 239{
 240    struct VncRect rect;
 241    QLIST_ENTRY(VncRectEntry) next;
 242};
 243
 244struct VncJob
 245{
 246    VncState *vs;
 247
 248    QLIST_HEAD(, VncRectEntry) rectangles;
 249    QTAILQ_ENTRY(VncJob) next;
 250};
 251
 252typedef enum {
 253    VNC_STATE_UPDATE_NONE,
 254    VNC_STATE_UPDATE_INCREMENTAL,
 255    VNC_STATE_UPDATE_FORCE,
 256} VncStateUpdate;
 257
 258struct VncState
 259{
 260    QIOChannelSocket *sioc; /* The underlying socket */
 261    QIOChannel *ioc; /* The channel currently used for I/O */
 262    guint ioc_tag;
 263    gboolean disconnecting;
 264
 265    DECLARE_BITMAP(dirty[VNC_MAX_HEIGHT], VNC_DIRTY_BITS);
 266    uint8_t **lossy_rect; /* Not an Array to avoid costly memcpy in
 267                           * vnc-jobs-async.c */
 268
 269    VncDisplay *vd;
 270    VncStateUpdate update; /* Most recent pending request from client */
 271    VncStateUpdate job_update; /* Currently processed by job thread */
 272    int has_dirty;
 273    uint32_t features;
 274    int absolute;
 275    int last_x;
 276    int last_y;
 277    uint32_t last_bmask;
 278    size_t client_width; /* limited to u16 by RFB proto */
 279    size_t client_height; /* limited to u16 by RFB proto */
 280    VncShareMode share_mode;
 281
 282    uint32_t vnc_encoding;
 283
 284    int major;
 285    int minor;
 286
 287    int auth;
 288    int subauth; /* Used by VeNCrypt */
 289    char challenge[VNC_AUTH_CHALLENGE_SIZE];
 290    QCryptoTLSSession *tls; /* Borrowed pointer from channel, don't free */
 291#ifdef CONFIG_VNC_SASL
 292    VncStateSASL sasl;
 293#endif
 294    bool encode_ws;
 295    bool websocket;
 296
 297    VncClientInfo *info;
 298
 299    /* Job thread bottom half has put data for a forced update
 300     * into the output buffer. This offset points to the end of
 301     * the update data in the output buffer. This lets us determine
 302     * when a force update is fully sent to the client, allowing
 303     * us to process further forced updates. */
 304    size_t force_update_offset;
 305    /* We allow multiple incremental updates or audio capture
 306     * samples to be queued in output buffer, provided the
 307     * buffer size doesn't exceed this threshold. The value
 308     * is calculating dynamically based on framebuffer size
 309     * and audio sample settings in vnc_update_throttle_offset() */
 310    size_t throttle_output_offset;
 311    Buffer output;
 312    Buffer input;
 313    /* current output mode information */
 314    VncWritePixels *write_pixels;
 315    PixelFormat client_pf;
 316    pixman_format_code_t client_format;
 317    bool client_be;
 318
 319    CaptureVoiceOut *audio_cap;
 320    struct audsettings as;
 321
 322    VncReadEvent *read_handler;
 323    size_t read_handler_expect;
 324    /* input */
 325    uint8_t modifiers_state[256];
 326
 327    bool abort;
 328    QemuMutex output_mutex;
 329    QEMUBH *bh;
 330    Buffer jobs_buffer;
 331
 332    /* Encoding specific, if you add something here, don't forget to
 333     *  update vnc_async_encoding_start()
 334     */
 335    VncTight tight;
 336    VncZlib zlib;
 337    VncHextile hextile;
 338    VncZrle zrle;
 339    VncZywrle zywrle;
 340
 341    Notifier mouse_mode_notifier;
 342
 343    QTAILQ_ENTRY(VncState) next;
 344};
 345
 346
 347/*****************************************************************************
 348 *
 349 * Authentication modes
 350 *
 351 *****************************************************************************/
 352
 353enum {
 354    VNC_AUTH_INVALID = 0,
 355    VNC_AUTH_NONE = 1,
 356    VNC_AUTH_VNC = 2,
 357    VNC_AUTH_RA2 = 5,
 358    VNC_AUTH_RA2NE = 6,
 359    VNC_AUTH_TIGHT = 16,
 360    VNC_AUTH_ULTRA = 17,
 361    VNC_AUTH_TLS = 18,      /* Supported in GTK-VNC & VINO */
 362    VNC_AUTH_VENCRYPT = 19, /* Supported in GTK-VNC & VeNCrypt */
 363    VNC_AUTH_SASL = 20,     /* Supported in GTK-VNC & VINO */
 364};
 365
 366enum {
 367    VNC_AUTH_VENCRYPT_PLAIN = 256,
 368    VNC_AUTH_VENCRYPT_TLSNONE = 257,
 369    VNC_AUTH_VENCRYPT_TLSVNC = 258,
 370    VNC_AUTH_VENCRYPT_TLSPLAIN = 259,
 371    VNC_AUTH_VENCRYPT_X509NONE = 260,
 372    VNC_AUTH_VENCRYPT_X509VNC = 261,
 373    VNC_AUTH_VENCRYPT_X509PLAIN = 262,
 374    VNC_AUTH_VENCRYPT_X509SASL = 263,
 375    VNC_AUTH_VENCRYPT_TLSSASL = 264,
 376};
 377
 378
 379/*****************************************************************************
 380 *
 381 * Encoding types
 382 *
 383 *****************************************************************************/
 384
 385#define VNC_ENCODING_RAW                  0x00000000
 386#define VNC_ENCODING_COPYRECT             0x00000001
 387#define VNC_ENCODING_RRE                  0x00000002
 388#define VNC_ENCODING_CORRE                0x00000004
 389#define VNC_ENCODING_HEXTILE              0x00000005
 390#define VNC_ENCODING_ZLIB                 0x00000006
 391#define VNC_ENCODING_TIGHT                0x00000007
 392#define VNC_ENCODING_ZLIBHEX              0x00000008
 393#define VNC_ENCODING_TRLE                 0x0000000f
 394#define VNC_ENCODING_ZRLE                 0x00000010
 395#define VNC_ENCODING_ZYWRLE               0x00000011
 396#define VNC_ENCODING_COMPRESSLEVEL0       0xFFFFFF00 /* -256 */
 397#define VNC_ENCODING_QUALITYLEVEL0        0xFFFFFFE0 /* -32  */
 398#define VNC_ENCODING_XCURSOR              0xFFFFFF10 /* -240 */
 399#define VNC_ENCODING_RICH_CURSOR          0xFFFFFF11 /* -239 */
 400#define VNC_ENCODING_POINTER_POS          0xFFFFFF18 /* -232 */
 401#define VNC_ENCODING_LASTRECT             0xFFFFFF20 /* -224 */
 402#define VNC_ENCODING_DESKTOPRESIZE        0xFFFFFF21 /* -223 */
 403#define VNC_ENCODING_POINTER_TYPE_CHANGE  0XFFFFFEFF /* -257 */
 404#define VNC_ENCODING_EXT_KEY_EVENT        0XFFFFFEFE /* -258 */
 405#define VNC_ENCODING_AUDIO                0XFFFFFEFD /* -259 */
 406#define VNC_ENCODING_TIGHT_PNG            0xFFFFFEFC /* -260 */
 407#define VNC_ENCODING_LED_STATE            0XFFFFFEFB /* -261 */
 408#define VNC_ENCODING_WMVi                 0x574D5669
 409
 410/*****************************************************************************
 411 *
 412 * Other tight constants
 413 *
 414 *****************************************************************************/
 415
 416/*
 417 * Vendors known by TightVNC: standard VNC/RealVNC, TridiaVNC, and TightVNC.
 418 */
 419
 420#define VNC_TIGHT_CCB_RESET_MASK   (0x0f)
 421#define VNC_TIGHT_CCB_TYPE_MASK    (0x0f << 4)
 422#define VNC_TIGHT_CCB_TYPE_FILL    (0x08 << 4)
 423#define VNC_TIGHT_CCB_TYPE_JPEG    (0x09 << 4)
 424#define VNC_TIGHT_CCB_TYPE_PNG     (0x0A << 4)
 425#define VNC_TIGHT_CCB_BASIC_MAX    (0x07 << 4)
 426#define VNC_TIGHT_CCB_BASIC_ZLIB   (0x03 << 4)
 427#define VNC_TIGHT_CCB_BASIC_FILTER (0x04 << 4)
 428
 429/*****************************************************************************
 430 *
 431 * Features
 432 *
 433 *****************************************************************************/
 434
 435#define VNC_FEATURE_RESIZE                   0
 436#define VNC_FEATURE_HEXTILE                  1
 437#define VNC_FEATURE_POINTER_TYPE_CHANGE      2
 438#define VNC_FEATURE_WMVI                     3
 439#define VNC_FEATURE_TIGHT                    4
 440#define VNC_FEATURE_ZLIB                     5
 441#define VNC_FEATURE_COPYRECT                 6
 442#define VNC_FEATURE_RICH_CURSOR              7
 443#define VNC_FEATURE_TIGHT_PNG                8
 444#define VNC_FEATURE_ZRLE                     9
 445#define VNC_FEATURE_ZYWRLE                  10
 446#define VNC_FEATURE_LED_STATE               11
 447
 448#define VNC_FEATURE_RESIZE_MASK              (1 << VNC_FEATURE_RESIZE)
 449#define VNC_FEATURE_HEXTILE_MASK             (1 << VNC_FEATURE_HEXTILE)
 450#define VNC_FEATURE_POINTER_TYPE_CHANGE_MASK (1 << VNC_FEATURE_POINTER_TYPE_CHANGE)
 451#define VNC_FEATURE_WMVI_MASK                (1 << VNC_FEATURE_WMVI)
 452#define VNC_FEATURE_TIGHT_MASK               (1 << VNC_FEATURE_TIGHT)
 453#define VNC_FEATURE_ZLIB_MASK                (1 << VNC_FEATURE_ZLIB)
 454#define VNC_FEATURE_COPYRECT_MASK            (1 << VNC_FEATURE_COPYRECT)
 455#define VNC_FEATURE_RICH_CURSOR_MASK         (1 << VNC_FEATURE_RICH_CURSOR)
 456#define VNC_FEATURE_TIGHT_PNG_MASK           (1 << VNC_FEATURE_TIGHT_PNG)
 457#define VNC_FEATURE_ZRLE_MASK                (1 << VNC_FEATURE_ZRLE)
 458#define VNC_FEATURE_ZYWRLE_MASK              (1 << VNC_FEATURE_ZYWRLE)
 459#define VNC_FEATURE_LED_STATE_MASK           (1 << VNC_FEATURE_LED_STATE)
 460
 461
 462/* Client -> Server message IDs */
 463#define VNC_MSG_CLIENT_SET_PIXEL_FORMAT           0
 464#define VNC_MSG_CLIENT_SET_ENCODINGS              2
 465#define VNC_MSG_CLIENT_FRAMEBUFFER_UPDATE_REQUEST 3
 466#define VNC_MSG_CLIENT_KEY_EVENT                  4
 467#define VNC_MSG_CLIENT_POINTER_EVENT              5
 468#define VNC_MSG_CLIENT_CUT_TEXT                   6
 469#define VNC_MSG_CLIENT_VMWARE_0                   127
 470#define VNC_MSG_CLIENT_CALL_CONTROL               249
 471#define VNC_MSG_CLIENT_XVP                        250
 472#define VNC_MSG_CLIENT_SET_DESKTOP_SIZE           251
 473#define VNC_MSG_CLIENT_TIGHT                      252
 474#define VNC_MSG_CLIENT_GII                        253
 475#define VNC_MSG_CLIENT_VMWARE_1                   254
 476#define VNC_MSG_CLIENT_QEMU                       255
 477
 478/* Server -> Client message IDs */
 479#define VNC_MSG_SERVER_FRAMEBUFFER_UPDATE         0
 480#define VNC_MSG_SERVER_SET_COLOUR_MAP_ENTRIES     1
 481#define VNC_MSG_SERVER_BELL                       2
 482#define VNC_MSG_SERVER_CUT_TEXT                   3
 483#define VNC_MSG_SERVER_VMWARE_0                   127
 484#define VNC_MSG_SERVER_CALL_CONTROL               249
 485#define VNC_MSG_SERVER_XVP                        250
 486#define VNC_MSG_SERVER_TIGHT                      252
 487#define VNC_MSG_SERVER_GII                        253
 488#define VNC_MSG_SERVER_VMWARE_1                   254
 489#define VNC_MSG_SERVER_QEMU                       255
 490
 491
 492
 493/* QEMU client -> server message IDs */
 494#define VNC_MSG_CLIENT_QEMU_EXT_KEY_EVENT         0
 495#define VNC_MSG_CLIENT_QEMU_AUDIO                 1
 496
 497/* QEMU server -> client message IDs */
 498#define VNC_MSG_SERVER_QEMU_AUDIO                 1
 499
 500
 501
 502/* QEMU client -> server audio message IDs */
 503#define VNC_MSG_CLIENT_QEMU_AUDIO_ENABLE          0
 504#define VNC_MSG_CLIENT_QEMU_AUDIO_DISABLE         1
 505#define VNC_MSG_CLIENT_QEMU_AUDIO_SET_FORMAT      2
 506
 507/* QEMU server -> client audio message IDs */
 508#define VNC_MSG_SERVER_QEMU_AUDIO_END             0
 509#define VNC_MSG_SERVER_QEMU_AUDIO_BEGIN           1
 510#define VNC_MSG_SERVER_QEMU_AUDIO_DATA            2
 511
 512
 513/*****************************************************************************
 514 *
 515 * Internal APIs
 516 *
 517 *****************************************************************************/
 518
 519/* Event loop functions */
 520gboolean vnc_client_io(QIOChannel *ioc,
 521                       GIOCondition condition,
 522                       void *opaque);
 523
 524size_t vnc_client_read_buf(VncState *vs, uint8_t *data, size_t datalen);
 525size_t vnc_client_write_buf(VncState *vs, const uint8_t *data, size_t datalen);
 526
 527/* Protocol I/O functions */
 528void vnc_write(VncState *vs, const void *data, size_t len);
 529void vnc_write_u32(VncState *vs, uint32_t value);
 530void vnc_write_s32(VncState *vs, int32_t value);
 531void vnc_write_u16(VncState *vs, uint16_t value);
 532void vnc_write_u8(VncState *vs, uint8_t value);
 533void vnc_flush(VncState *vs);
 534void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting);
 535void vnc_disconnect_finish(VncState *vs);
 536void vnc_start_protocol(VncState *vs);
 537
 538
 539/* Buffer I/O functions */
 540uint32_t read_u32(uint8_t *data, size_t offset);
 541
 542/* Protocol stage functions */
 543void vnc_client_error(VncState *vs);
 544size_t vnc_client_io_error(VncState *vs, ssize_t ret, Error **errp);
 545
 546void start_client_init(VncState *vs);
 547void start_auth_vnc(VncState *vs);
 548
 549
 550/* Misc helpers */
 551
 552static inline uint32_t vnc_has_feature(VncState *vs, int feature) {
 553    return (vs->features & (1 << feature));
 554}
 555
 556/* Framebuffer */
 557void vnc_framebuffer_update(VncState *vs, int x, int y, int w, int h,
 558                            int32_t encoding);
 559
 560/* server fb is in PIXMAN_x8r8g8b8 */
 561#define VNC_SERVER_FB_FORMAT PIXMAN_FORMAT(32, PIXMAN_TYPE_ARGB, 0, 8, 8, 8)
 562#define VNC_SERVER_FB_BITS   (PIXMAN_FORMAT_BPP(VNC_SERVER_FB_FORMAT))
 563#define VNC_SERVER_FB_BYTES  ((VNC_SERVER_FB_BITS+7)/8)
 564
 565void *vnc_server_fb_ptr(VncDisplay *vd, int x, int y);
 566int vnc_server_fb_stride(VncDisplay *vd);
 567
 568void vnc_convert_pixel(VncState *vs, uint8_t *buf, uint32_t v);
 569double vnc_update_freq(VncState *vs, int x, int y, int w, int h);
 570void vnc_sent_lossy_rect(VncState *vs, int x, int y, int w, int h);
 571
 572/* Encodings */
 573int vnc_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 574
 575int vnc_raw_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 576
 577int vnc_hextile_send_framebuffer_update(VncState *vs, int x,
 578                                         int y, int w, int h);
 579void vnc_hextile_set_pixel_conversion(VncState *vs, int generic);
 580
 581void *vnc_zlib_zalloc(void *x, unsigned items, unsigned size);
 582void vnc_zlib_zfree(void *x, void *addr);
 583int vnc_zlib_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 584void vnc_zlib_clear(VncState *vs);
 585
 586int vnc_tight_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 587int vnc_tight_png_send_framebuffer_update(VncState *vs, int x, int y,
 588                                          int w, int h);
 589void vnc_tight_clear(VncState *vs);
 590
 591int vnc_zrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 592int vnc_zywrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 593void vnc_zrle_clear(VncState *vs);
 594
 595#endif /* QEMU_VNC_H */
 596