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 "qapi/qapi-types-ui.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 "io/net-listener.h"
  41#include "authz/base.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
  63typedef struct VncState VncState;
  64typedef struct VncJob VncJob;
  65typedef struct VncRect VncRect;
  66typedef struct VncRectEntry VncRectEntry;
  67
  68typedef int VncReadEvent(VncState *vs, uint8_t *data, size_t len);
  69
  70typedef void VncWritePixels(VncState *vs, void *data, int size);
  71
  72typedef 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
 100typedef 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
 108struct 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
 118typedef struct VncRectStat VncRectStat;
 119
 120struct 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
 130typedef 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
 137typedef enum VncSharePolicy {
 138    VNC_SHARE_POLICY_IGNORE = 1,
 139    VNC_SHARE_POLICY_ALLOW_EXCLUSIVE,
 140    VNC_SHARE_POLICY_FORCE_SHARED,
 141} VncSharePolicy;
 142
 143struct 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    QAuthZ *tlsauthz;
 182    char *tlsauthzid;
 183#ifdef CONFIG_VNC_SASL
 184    VncDisplaySASL sasl;
 185#endif
 186};
 187
 188typedef struct VncTight {
 189    int type;
 190    uint8_t quality;
 191    uint8_t compression;
 192    uint8_t pixel24;
 193    Buffer tight;
 194    Buffer tmp;
 195    Buffer zlib;
 196    Buffer gradient;
 197#ifdef CONFIG_VNC_JPEG
 198    Buffer jpeg;
 199#endif
 200#ifdef CONFIG_VNC_PNG
 201    Buffer png;
 202#endif
 203    int levels[4];
 204    z_stream stream[4];
 205} VncTight;
 206
 207typedef struct VncHextile {
 208    VncSendHextileTile *send_tile;
 209} VncHextile;
 210
 211typedef struct VncZlib {
 212    Buffer zlib;
 213    Buffer tmp;
 214    z_stream stream;
 215    int level;
 216} VncZlib;
 217
 218typedef struct VncZrle {
 219    int type;
 220    Buffer fb;
 221    Buffer zrle;
 222    Buffer tmp;
 223    Buffer zlib;
 224    z_stream stream;
 225    VncPalette palette;
 226} VncZrle;
 227
 228typedef struct VncZywrle {
 229    int buf[VNC_ZRLE_TILE_WIDTH * VNC_ZRLE_TILE_HEIGHT];
 230} VncZywrle;
 231
 232struct VncRect
 233{
 234    int x;
 235    int y;
 236    int w;
 237    int h;
 238};
 239
 240struct VncRectEntry
 241{
 242    struct VncRect rect;
 243    QLIST_ENTRY(VncRectEntry) next;
 244};
 245
 246struct VncJob
 247{
 248    VncState *vs;
 249
 250    QLIST_HEAD(, VncRectEntry) rectangles;
 251    QTAILQ_ENTRY(VncJob) next;
 252};
 253
 254typedef enum {
 255    VNC_STATE_UPDATE_NONE,
 256    VNC_STATE_UPDATE_INCREMENTAL,
 257    VNC_STATE_UPDATE_FORCE,
 258} VncStateUpdate;
 259
 260#define VNC_MAGIC ((uint64_t)0x05b3f069b3d204bb)
 261
 262struct VncState
 263{
 264    uint64_t magic;
 265    QIOChannelSocket *sioc; /* The underlying socket */
 266    QIOChannel *ioc; /* The channel currently used for I/O */
 267    guint ioc_tag;
 268    gboolean disconnecting;
 269
 270    DECLARE_BITMAP(dirty[VNC_MAX_HEIGHT], VNC_DIRTY_BITS);
 271    uint8_t **lossy_rect; /* Not an Array to avoid costly memcpy in
 272                           * vnc-jobs-async.c */
 273
 274    VncDisplay *vd;
 275    VncStateUpdate update; /* Most recent pending request from client */
 276    VncStateUpdate job_update; /* Currently processed by job thread */
 277    int has_dirty;
 278    uint32_t features;
 279    int absolute;
 280    int last_x;
 281    int last_y;
 282    uint32_t last_bmask;
 283    size_t client_width; /* limited to u16 by RFB proto */
 284    size_t client_height; /* limited to u16 by RFB proto */
 285    VncShareMode share_mode;
 286
 287    uint32_t vnc_encoding;
 288
 289    int major;
 290    int minor;
 291
 292    int auth;
 293    int subauth; /* Used by VeNCrypt */
 294    char challenge[VNC_AUTH_CHALLENGE_SIZE];
 295    QCryptoTLSSession *tls; /* Borrowed pointer from channel, don't free */
 296#ifdef CONFIG_VNC_SASL
 297    VncStateSASL sasl;
 298#endif
 299    bool encode_ws;
 300    bool websocket;
 301
 302#ifdef CONFIG_VNC
 303    VncClientInfo *info;
 304#endif
 305
 306    /* Job thread bottom half has put data for a forced update
 307     * into the output buffer. This offset points to the end of
 308     * the update data in the output buffer. This lets us determine
 309     * when a force update is fully sent to the client, allowing
 310     * us to process further forced updates. */
 311    size_t force_update_offset;
 312    /* We allow multiple incremental updates or audio capture
 313     * samples to be queued in output buffer, provided the
 314     * buffer size doesn't exceed this threshold. The value
 315     * is calculating dynamically based on framebuffer size
 316     * and audio sample settings in vnc_update_throttle_offset() */
 317    size_t throttle_output_offset;
 318    Buffer output;
 319    Buffer input;
 320    /* current output mode information */
 321    VncWritePixels *write_pixels;
 322    PixelFormat client_pf;
 323    pixman_format_code_t client_format;
 324    bool client_be;
 325
 326    CaptureVoiceOut *audio_cap;
 327    struct audsettings as;
 328
 329    VncReadEvent *read_handler;
 330    size_t read_handler_expect;
 331
 332    bool abort;
 333    QemuMutex output_mutex;
 334    QEMUBH *bh;
 335    Buffer jobs_buffer;
 336
 337    /* Encoding specific, if you add something here, don't forget to
 338     *  update vnc_async_encoding_start()
 339     */
 340    VncTight tight;
 341    VncZlib zlib;
 342    VncHextile hextile;
 343    VncZrle zrle;
 344    VncZywrle zywrle;
 345
 346    Notifier mouse_mode_notifier;
 347
 348    QTAILQ_ENTRY(VncState) next;
 349};
 350
 351
 352/*****************************************************************************
 353 *
 354 * Authentication modes
 355 *
 356 *****************************************************************************/
 357
 358enum {
 359    VNC_AUTH_INVALID = 0,
 360    VNC_AUTH_NONE = 1,
 361    VNC_AUTH_VNC = 2,
 362    VNC_AUTH_RA2 = 5,
 363    VNC_AUTH_RA2NE = 6,
 364    VNC_AUTH_TIGHT = 16,
 365    VNC_AUTH_ULTRA = 17,
 366    VNC_AUTH_TLS = 18,      /* Supported in GTK-VNC & VINO */
 367    VNC_AUTH_VENCRYPT = 19, /* Supported in GTK-VNC & VeNCrypt */
 368    VNC_AUTH_SASL = 20,     /* Supported in GTK-VNC & VINO */
 369};
 370
 371enum {
 372    VNC_AUTH_VENCRYPT_PLAIN = 256,
 373    VNC_AUTH_VENCRYPT_TLSNONE = 257,
 374    VNC_AUTH_VENCRYPT_TLSVNC = 258,
 375    VNC_AUTH_VENCRYPT_TLSPLAIN = 259,
 376    VNC_AUTH_VENCRYPT_X509NONE = 260,
 377    VNC_AUTH_VENCRYPT_X509VNC = 261,
 378    VNC_AUTH_VENCRYPT_X509PLAIN = 262,
 379    VNC_AUTH_VENCRYPT_X509SASL = 263,
 380    VNC_AUTH_VENCRYPT_TLSSASL = 264,
 381};
 382
 383
 384/*****************************************************************************
 385 *
 386 * Encoding types
 387 *
 388 *****************************************************************************/
 389
 390#define VNC_ENCODING_RAW                  0x00000000
 391#define VNC_ENCODING_COPYRECT             0x00000001
 392#define VNC_ENCODING_RRE                  0x00000002
 393#define VNC_ENCODING_CORRE                0x00000004
 394#define VNC_ENCODING_HEXTILE              0x00000005
 395#define VNC_ENCODING_ZLIB                 0x00000006
 396#define VNC_ENCODING_TIGHT                0x00000007
 397#define VNC_ENCODING_ZLIBHEX              0x00000008
 398#define VNC_ENCODING_TRLE                 0x0000000f
 399#define VNC_ENCODING_ZRLE                 0x00000010
 400#define VNC_ENCODING_ZYWRLE               0x00000011
 401#define VNC_ENCODING_COMPRESSLEVEL0       0xFFFFFF00 /* -256 */
 402#define VNC_ENCODING_QUALITYLEVEL0        0xFFFFFFE0 /* -32  */
 403#define VNC_ENCODING_XCURSOR              0xFFFFFF10 /* -240 */
 404#define VNC_ENCODING_RICH_CURSOR          0xFFFFFF11 /* -239 */
 405#define VNC_ENCODING_POINTER_POS          0xFFFFFF18 /* -232 */
 406#define VNC_ENCODING_LASTRECT             0xFFFFFF20 /* -224 */
 407#define VNC_ENCODING_DESKTOPRESIZE        0xFFFFFF21 /* -223 */
 408#define VNC_ENCODING_POINTER_TYPE_CHANGE  0XFFFFFEFF /* -257 */
 409#define VNC_ENCODING_EXT_KEY_EVENT        0XFFFFFEFE /* -258 */
 410#define VNC_ENCODING_AUDIO                0XFFFFFEFD /* -259 */
 411#define VNC_ENCODING_TIGHT_PNG            0xFFFFFEFC /* -260 */
 412#define VNC_ENCODING_LED_STATE            0XFFFFFEFB /* -261 */
 413#define VNC_ENCODING_WMVi                 0x574D5669
 414
 415/*****************************************************************************
 416 *
 417 * Other tight constants
 418 *
 419 *****************************************************************************/
 420
 421/*
 422 * Vendors known by TightVNC: standard VNC/RealVNC, TridiaVNC, and TightVNC.
 423 */
 424
 425#define VNC_TIGHT_CCB_RESET_MASK   (0x0f)
 426#define VNC_TIGHT_CCB_TYPE_MASK    (0x0f << 4)
 427#define VNC_TIGHT_CCB_TYPE_FILL    (0x08 << 4)
 428#define VNC_TIGHT_CCB_TYPE_JPEG    (0x09 << 4)
 429#define VNC_TIGHT_CCB_TYPE_PNG     (0x0A << 4)
 430#define VNC_TIGHT_CCB_BASIC_MAX    (0x07 << 4)
 431#define VNC_TIGHT_CCB_BASIC_ZLIB   (0x03 << 4)
 432#define VNC_TIGHT_CCB_BASIC_FILTER (0x04 << 4)
 433
 434/*****************************************************************************
 435 *
 436 * Features
 437 *
 438 *****************************************************************************/
 439
 440#define VNC_FEATURE_RESIZE                   0
 441#define VNC_FEATURE_HEXTILE                  1
 442#define VNC_FEATURE_POINTER_TYPE_CHANGE      2
 443#define VNC_FEATURE_WMVI                     3
 444#define VNC_FEATURE_TIGHT                    4
 445#define VNC_FEATURE_ZLIB                     5
 446#define VNC_FEATURE_COPYRECT                 6
 447#define VNC_FEATURE_RICH_CURSOR              7
 448#define VNC_FEATURE_TIGHT_PNG                8
 449#define VNC_FEATURE_ZRLE                     9
 450#define VNC_FEATURE_ZYWRLE                  10
 451#define VNC_FEATURE_LED_STATE               11
 452
 453#define VNC_FEATURE_RESIZE_MASK              (1 << VNC_FEATURE_RESIZE)
 454#define VNC_FEATURE_HEXTILE_MASK             (1 << VNC_FEATURE_HEXTILE)
 455#define VNC_FEATURE_POINTER_TYPE_CHANGE_MASK (1 << VNC_FEATURE_POINTER_TYPE_CHANGE)
 456#define VNC_FEATURE_WMVI_MASK                (1 << VNC_FEATURE_WMVI)
 457#define VNC_FEATURE_TIGHT_MASK               (1 << VNC_FEATURE_TIGHT)
 458#define VNC_FEATURE_ZLIB_MASK                (1 << VNC_FEATURE_ZLIB)
 459#define VNC_FEATURE_COPYRECT_MASK            (1 << VNC_FEATURE_COPYRECT)
 460#define VNC_FEATURE_RICH_CURSOR_MASK         (1 << VNC_FEATURE_RICH_CURSOR)
 461#define VNC_FEATURE_TIGHT_PNG_MASK           (1 << VNC_FEATURE_TIGHT_PNG)
 462#define VNC_FEATURE_ZRLE_MASK                (1 << VNC_FEATURE_ZRLE)
 463#define VNC_FEATURE_ZYWRLE_MASK              (1 << VNC_FEATURE_ZYWRLE)
 464#define VNC_FEATURE_LED_STATE_MASK           (1 << VNC_FEATURE_LED_STATE)
 465
 466
 467/* Client -> Server message IDs */
 468#define VNC_MSG_CLIENT_SET_PIXEL_FORMAT           0
 469#define VNC_MSG_CLIENT_SET_ENCODINGS              2
 470#define VNC_MSG_CLIENT_FRAMEBUFFER_UPDATE_REQUEST 3
 471#define VNC_MSG_CLIENT_KEY_EVENT                  4
 472#define VNC_MSG_CLIENT_POINTER_EVENT              5
 473#define VNC_MSG_CLIENT_CUT_TEXT                   6
 474#define VNC_MSG_CLIENT_VMWARE_0                   127
 475#define VNC_MSG_CLIENT_CALL_CONTROL               249
 476#define VNC_MSG_CLIENT_XVP                        250
 477#define VNC_MSG_CLIENT_SET_DESKTOP_SIZE           251
 478#define VNC_MSG_CLIENT_TIGHT                      252
 479#define VNC_MSG_CLIENT_GII                        253
 480#define VNC_MSG_CLIENT_VMWARE_1                   254
 481#define VNC_MSG_CLIENT_QEMU                       255
 482
 483/* Server -> Client message IDs */
 484#define VNC_MSG_SERVER_FRAMEBUFFER_UPDATE         0
 485#define VNC_MSG_SERVER_SET_COLOUR_MAP_ENTRIES     1
 486#define VNC_MSG_SERVER_BELL                       2
 487#define VNC_MSG_SERVER_CUT_TEXT                   3
 488#define VNC_MSG_SERVER_VMWARE_0                   127
 489#define VNC_MSG_SERVER_CALL_CONTROL               249
 490#define VNC_MSG_SERVER_XVP                        250
 491#define VNC_MSG_SERVER_TIGHT                      252
 492#define VNC_MSG_SERVER_GII                        253
 493#define VNC_MSG_SERVER_VMWARE_1                   254
 494#define VNC_MSG_SERVER_QEMU                       255
 495
 496
 497
 498/* QEMU client -> server message IDs */
 499#define VNC_MSG_CLIENT_QEMU_EXT_KEY_EVENT         0
 500#define VNC_MSG_CLIENT_QEMU_AUDIO                 1
 501
 502/* QEMU server -> client message IDs */
 503#define VNC_MSG_SERVER_QEMU_AUDIO                 1
 504
 505
 506
 507/* QEMU client -> server audio message IDs */
 508#define VNC_MSG_CLIENT_QEMU_AUDIO_ENABLE          0
 509#define VNC_MSG_CLIENT_QEMU_AUDIO_DISABLE         1
 510#define VNC_MSG_CLIENT_QEMU_AUDIO_SET_FORMAT      2
 511
 512/* QEMU server -> client audio message IDs */
 513#define VNC_MSG_SERVER_QEMU_AUDIO_END             0
 514#define VNC_MSG_SERVER_QEMU_AUDIO_BEGIN           1
 515#define VNC_MSG_SERVER_QEMU_AUDIO_DATA            2
 516
 517
 518/*****************************************************************************
 519 *
 520 * Internal APIs
 521 *
 522 *****************************************************************************/
 523
 524/* Event loop functions */
 525gboolean vnc_client_io(QIOChannel *ioc,
 526                       GIOCondition condition,
 527                       void *opaque);
 528
 529size_t vnc_client_read_buf(VncState *vs, uint8_t *data, size_t datalen);
 530size_t vnc_client_write_buf(VncState *vs, const uint8_t *data, size_t datalen);
 531
 532/* Protocol I/O functions */
 533void vnc_write(VncState *vs, const void *data, size_t len);
 534void vnc_write_u32(VncState *vs, uint32_t value);
 535void vnc_write_s32(VncState *vs, int32_t value);
 536void vnc_write_u16(VncState *vs, uint16_t value);
 537void vnc_write_u8(VncState *vs, uint8_t value);
 538void vnc_flush(VncState *vs);
 539void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting);
 540void vnc_disconnect_finish(VncState *vs);
 541void vnc_start_protocol(VncState *vs);
 542
 543
 544/* Buffer I/O functions */
 545uint32_t read_u32(uint8_t *data, size_t offset);
 546
 547/* Protocol stage functions */
 548void vnc_client_error(VncState *vs);
 549size_t vnc_client_io_error(VncState *vs, ssize_t ret, Error **errp);
 550
 551void start_client_init(VncState *vs);
 552void start_auth_vnc(VncState *vs);
 553
 554
 555/* Misc helpers */
 556
 557static inline uint32_t vnc_has_feature(VncState *vs, int feature) {
 558    return (vs->features & (1 << feature));
 559}
 560
 561/* Framebuffer */
 562void vnc_framebuffer_update(VncState *vs, int x, int y, int w, int h,
 563                            int32_t encoding);
 564
 565/* server fb is in PIXMAN_x8r8g8b8 */
 566#define VNC_SERVER_FB_FORMAT PIXMAN_FORMAT(32, PIXMAN_TYPE_ARGB, 0, 8, 8, 8)
 567#define VNC_SERVER_FB_BITS   (PIXMAN_FORMAT_BPP(VNC_SERVER_FB_FORMAT))
 568#define VNC_SERVER_FB_BYTES  ((VNC_SERVER_FB_BITS+7)/8)
 569
 570void *vnc_server_fb_ptr(VncDisplay *vd, int x, int y);
 571int vnc_server_fb_stride(VncDisplay *vd);
 572
 573void vnc_convert_pixel(VncState *vs, uint8_t *buf, uint32_t v);
 574double vnc_update_freq(VncState *vs, int x, int y, int w, int h);
 575void vnc_sent_lossy_rect(VncState *vs, int x, int y, int w, int h);
 576
 577/* Encodings */
 578int vnc_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 579
 580int vnc_raw_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 581
 582int vnc_hextile_send_framebuffer_update(VncState *vs, int x,
 583                                         int y, int w, int h);
 584void vnc_hextile_set_pixel_conversion(VncState *vs, int generic);
 585
 586void *vnc_zlib_zalloc(void *x, unsigned items, unsigned size);
 587void vnc_zlib_zfree(void *x, void *addr);
 588int vnc_zlib_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 589void vnc_zlib_clear(VncState *vs);
 590
 591int vnc_tight_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 592int vnc_tight_png_send_framebuffer_update(VncState *vs, int x, int y,
 593                                          int w, int h);
 594void vnc_tight_clear(VncState *vs);
 595
 596int vnc_zrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 597int vnc_zywrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 598void vnc_zrle_clear(VncState *vs);
 599
 600#endif /* QEMU_VNC_H */
 601