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    size_t nlsock;
 150    QIOChannelSocket **lsock;
 151    guint *lsock_tag;
 152    size_t nlwebsock;
 153    QIOChannelSocket **lwebsock;
 154    guint *lwebsock_tag;
 155    DisplaySurface *ds;
 156    DisplayChangeListener dcl;
 157    kbd_layout_t *kbd_layout;
 158    int lock_key_sync;
 159    QEMUPutLEDEntry *led;
 160    int ledstate;
 161    int key_delay_ms;
 162    QemuMutex mutex;
 163
 164    QEMUCursor *cursor;
 165    int cursor_msize;
 166    uint8_t *cursor_mask;
 167
 168    struct VncSurface guest;   /* guest visible surface (aka ds->surface) */
 169    pixman_image_t *server;    /* vnc server surface */
 170
 171    const char *id;
 172    QTAILQ_ENTRY(VncDisplay) next;
 173    bool is_unix;
 174    char *password;
 175    time_t expires;
 176    int auth;
 177    int subauth; /* Used by VeNCrypt */
 178    int ws_auth; /* Used by websockets */
 179    int ws_subauth; /* Used by websockets */
 180    bool lossy;
 181    bool non_adaptive;
 182    QCryptoTLSCreds *tlscreds;
 183    char *tlsaclname;
 184#ifdef CONFIG_VNC_SASL
 185    VncDisplaySASL sasl;
 186#endif
 187};
 188
 189typedef struct VncTight {
 190    int type;
 191    uint8_t quality;
 192    uint8_t compression;
 193    uint8_t pixel24;
 194    Buffer tight;
 195    Buffer tmp;
 196    Buffer zlib;
 197    Buffer gradient;
 198#ifdef CONFIG_VNC_JPEG
 199    Buffer jpeg;
 200#endif
 201#ifdef CONFIG_VNC_PNG
 202    Buffer png;
 203#endif
 204    int levels[4];
 205    z_stream stream[4];
 206} VncTight;
 207
 208typedef struct VncHextile {
 209    VncSendHextileTile *send_tile;
 210} VncHextile;
 211
 212typedef struct VncZlib {
 213    Buffer zlib;
 214    Buffer tmp;
 215    z_stream stream;
 216    int level;
 217} VncZlib;
 218
 219typedef struct VncZrle {
 220    int type;
 221    Buffer fb;
 222    Buffer zrle;
 223    Buffer tmp;
 224    Buffer zlib;
 225    z_stream stream;
 226    VncPalette palette;
 227} VncZrle;
 228
 229typedef struct VncZywrle {
 230    int buf[VNC_ZRLE_TILE_WIDTH * VNC_ZRLE_TILE_HEIGHT];
 231} VncZywrle;
 232
 233struct VncRect
 234{
 235    int x;
 236    int y;
 237    int w;
 238    int h;
 239};
 240
 241struct VncRectEntry
 242{
 243    struct VncRect rect;
 244    QLIST_ENTRY(VncRectEntry) next;
 245};
 246
 247struct VncJob
 248{
 249    VncState *vs;
 250
 251    QLIST_HEAD(, VncRectEntry) rectangles;
 252    QTAILQ_ENTRY(VncJob) next;
 253};
 254
 255typedef enum {
 256    VNC_STATE_UPDATE_NONE,
 257    VNC_STATE_UPDATE_INCREMENTAL,
 258    VNC_STATE_UPDATE_FORCE,
 259} VncStateUpdate;
 260
 261struct VncState
 262{
 263    QIOChannelSocket *sioc; /* The underlying socket */
 264    QIOChannel *ioc; /* The channel currently used for I/O */
 265    guint ioc_tag;
 266    gboolean disconnecting;
 267
 268    DECLARE_BITMAP(dirty[VNC_MAX_HEIGHT], VNC_DIRTY_BITS);
 269    uint8_t **lossy_rect; /* Not an Array to avoid costly memcpy in
 270                           * vnc-jobs-async.c */
 271
 272    VncDisplay *vd;
 273    VncStateUpdate update; /* Most recent pending request from client */
 274    VncStateUpdate job_update; /* Currently processed by job thread */
 275    int has_dirty;
 276    uint32_t features;
 277    int absolute;
 278    int last_x;
 279    int last_y;
 280    uint32_t last_bmask;
 281    size_t client_width; /* limited to u16 by RFB proto */
 282    size_t client_height; /* limited to u16 by RFB proto */
 283    VncShareMode share_mode;
 284
 285    uint32_t vnc_encoding;
 286
 287    int major;
 288    int minor;
 289
 290    int auth;
 291    int subauth; /* Used by VeNCrypt */
 292    char challenge[VNC_AUTH_CHALLENGE_SIZE];
 293    QCryptoTLSSession *tls; /* Borrowed pointer from channel, don't free */
 294#ifdef CONFIG_VNC_SASL
 295    VncStateSASL sasl;
 296#endif
 297    bool encode_ws;
 298    bool websocket;
 299
 300    VncClientInfo *info;
 301
 302    /* Job thread bottom half has put data for a forced update
 303     * into the output buffer. This offset points to the end of
 304     * the update data in the output buffer. This lets us determine
 305     * when a force update is fully sent to the client, allowing
 306     * us to process further forced updates. */
 307    size_t force_update_offset;
 308    /* We allow multiple incremental updates or audio capture
 309     * samples to be queued in output buffer, provided the
 310     * buffer size doesn't exceed this threshold. The value
 311     * is calculating dynamically based on framebuffer size
 312     * and audio sample settings in vnc_update_throttle_offset() */
 313    size_t throttle_output_offset;
 314    Buffer output;
 315    Buffer input;
 316    /* current output mode information */
 317    VncWritePixels *write_pixels;
 318    PixelFormat client_pf;
 319    pixman_format_code_t client_format;
 320    bool client_be;
 321
 322    CaptureVoiceOut *audio_cap;
 323    struct audsettings as;
 324
 325    VncReadEvent *read_handler;
 326    size_t read_handler_expect;
 327    /* input */
 328    uint8_t modifiers_state[256];
 329
 330    bool abort;
 331    QemuMutex output_mutex;
 332    QEMUBH *bh;
 333    Buffer jobs_buffer;
 334
 335    /* Encoding specific, if you add something here, don't forget to
 336     *  update vnc_async_encoding_start()
 337     */
 338    VncTight tight;
 339    VncZlib zlib;
 340    VncHextile hextile;
 341    VncZrle zrle;
 342    VncZywrle zywrle;
 343
 344    Notifier mouse_mode_notifier;
 345
 346    QTAILQ_ENTRY(VncState) next;
 347};
 348
 349
 350/*****************************************************************************
 351 *
 352 * Authentication modes
 353 *
 354 *****************************************************************************/
 355
 356enum {
 357    VNC_AUTH_INVALID = 0,
 358    VNC_AUTH_NONE = 1,
 359    VNC_AUTH_VNC = 2,
 360    VNC_AUTH_RA2 = 5,
 361    VNC_AUTH_RA2NE = 6,
 362    VNC_AUTH_TIGHT = 16,
 363    VNC_AUTH_ULTRA = 17,
 364    VNC_AUTH_TLS = 18,      /* Supported in GTK-VNC & VINO */
 365    VNC_AUTH_VENCRYPT = 19, /* Supported in GTK-VNC & VeNCrypt */
 366    VNC_AUTH_SASL = 20,     /* Supported in GTK-VNC & VINO */
 367};
 368
 369enum {
 370    VNC_AUTH_VENCRYPT_PLAIN = 256,
 371    VNC_AUTH_VENCRYPT_TLSNONE = 257,
 372    VNC_AUTH_VENCRYPT_TLSVNC = 258,
 373    VNC_AUTH_VENCRYPT_TLSPLAIN = 259,
 374    VNC_AUTH_VENCRYPT_X509NONE = 260,
 375    VNC_AUTH_VENCRYPT_X509VNC = 261,
 376    VNC_AUTH_VENCRYPT_X509PLAIN = 262,
 377    VNC_AUTH_VENCRYPT_X509SASL = 263,
 378    VNC_AUTH_VENCRYPT_TLSSASL = 264,
 379};
 380
 381
 382/*****************************************************************************
 383 *
 384 * Encoding types
 385 *
 386 *****************************************************************************/
 387
 388#define VNC_ENCODING_RAW                  0x00000000
 389#define VNC_ENCODING_COPYRECT             0x00000001
 390#define VNC_ENCODING_RRE                  0x00000002
 391#define VNC_ENCODING_CORRE                0x00000004
 392#define VNC_ENCODING_HEXTILE              0x00000005
 393#define VNC_ENCODING_ZLIB                 0x00000006
 394#define VNC_ENCODING_TIGHT                0x00000007
 395#define VNC_ENCODING_ZLIBHEX              0x00000008
 396#define VNC_ENCODING_TRLE                 0x0000000f
 397#define VNC_ENCODING_ZRLE                 0x00000010
 398#define VNC_ENCODING_ZYWRLE               0x00000011
 399#define VNC_ENCODING_COMPRESSLEVEL0       0xFFFFFF00 /* -256 */
 400#define VNC_ENCODING_QUALITYLEVEL0        0xFFFFFFE0 /* -32  */
 401#define VNC_ENCODING_XCURSOR              0xFFFFFF10 /* -240 */
 402#define VNC_ENCODING_RICH_CURSOR          0xFFFFFF11 /* -239 */
 403#define VNC_ENCODING_POINTER_POS          0xFFFFFF18 /* -232 */
 404#define VNC_ENCODING_LASTRECT             0xFFFFFF20 /* -224 */
 405#define VNC_ENCODING_DESKTOPRESIZE        0xFFFFFF21 /* -223 */
 406#define VNC_ENCODING_POINTER_TYPE_CHANGE  0XFFFFFEFF /* -257 */
 407#define VNC_ENCODING_EXT_KEY_EVENT        0XFFFFFEFE /* -258 */
 408#define VNC_ENCODING_AUDIO                0XFFFFFEFD /* -259 */
 409#define VNC_ENCODING_TIGHT_PNG            0xFFFFFEFC /* -260 */
 410#define VNC_ENCODING_LED_STATE            0XFFFFFEFB /* -261 */
 411#define VNC_ENCODING_WMVi                 0x574D5669
 412
 413/*****************************************************************************
 414 *
 415 * Other tight constants
 416 *
 417 *****************************************************************************/
 418
 419/*
 420 * Vendors known by TightVNC: standard VNC/RealVNC, TridiaVNC, and TightVNC.
 421 */
 422
 423#define VNC_TIGHT_CCB_RESET_MASK   (0x0f)
 424#define VNC_TIGHT_CCB_TYPE_MASK    (0x0f << 4)
 425#define VNC_TIGHT_CCB_TYPE_FILL    (0x08 << 4)
 426#define VNC_TIGHT_CCB_TYPE_JPEG    (0x09 << 4)
 427#define VNC_TIGHT_CCB_TYPE_PNG     (0x0A << 4)
 428#define VNC_TIGHT_CCB_BASIC_MAX    (0x07 << 4)
 429#define VNC_TIGHT_CCB_BASIC_ZLIB   (0x03 << 4)
 430#define VNC_TIGHT_CCB_BASIC_FILTER (0x04 << 4)
 431
 432/*****************************************************************************
 433 *
 434 * Features
 435 *
 436 *****************************************************************************/
 437
 438#define VNC_FEATURE_RESIZE                   0
 439#define VNC_FEATURE_HEXTILE                  1
 440#define VNC_FEATURE_POINTER_TYPE_CHANGE      2
 441#define VNC_FEATURE_WMVI                     3
 442#define VNC_FEATURE_TIGHT                    4
 443#define VNC_FEATURE_ZLIB                     5
 444#define VNC_FEATURE_COPYRECT                 6
 445#define VNC_FEATURE_RICH_CURSOR              7
 446#define VNC_FEATURE_TIGHT_PNG                8
 447#define VNC_FEATURE_ZRLE                     9
 448#define VNC_FEATURE_ZYWRLE                  10
 449#define VNC_FEATURE_LED_STATE               11
 450
 451#define VNC_FEATURE_RESIZE_MASK              (1 << VNC_FEATURE_RESIZE)
 452#define VNC_FEATURE_HEXTILE_MASK             (1 << VNC_FEATURE_HEXTILE)
 453#define VNC_FEATURE_POINTER_TYPE_CHANGE_MASK (1 << VNC_FEATURE_POINTER_TYPE_CHANGE)
 454#define VNC_FEATURE_WMVI_MASK                (1 << VNC_FEATURE_WMVI)
 455#define VNC_FEATURE_TIGHT_MASK               (1 << VNC_FEATURE_TIGHT)
 456#define VNC_FEATURE_ZLIB_MASK                (1 << VNC_FEATURE_ZLIB)
 457#define VNC_FEATURE_COPYRECT_MASK            (1 << VNC_FEATURE_COPYRECT)
 458#define VNC_FEATURE_RICH_CURSOR_MASK         (1 << VNC_FEATURE_RICH_CURSOR)
 459#define VNC_FEATURE_TIGHT_PNG_MASK           (1 << VNC_FEATURE_TIGHT_PNG)
 460#define VNC_FEATURE_ZRLE_MASK                (1 << VNC_FEATURE_ZRLE)
 461#define VNC_FEATURE_ZYWRLE_MASK              (1 << VNC_FEATURE_ZYWRLE)
 462#define VNC_FEATURE_LED_STATE_MASK           (1 << VNC_FEATURE_LED_STATE)
 463
 464
 465/* Client -> Server message IDs */
 466#define VNC_MSG_CLIENT_SET_PIXEL_FORMAT           0
 467#define VNC_MSG_CLIENT_SET_ENCODINGS              2
 468#define VNC_MSG_CLIENT_FRAMEBUFFER_UPDATE_REQUEST 3
 469#define VNC_MSG_CLIENT_KEY_EVENT                  4
 470#define VNC_MSG_CLIENT_POINTER_EVENT              5
 471#define VNC_MSG_CLIENT_CUT_TEXT                   6
 472#define VNC_MSG_CLIENT_VMWARE_0                   127
 473#define VNC_MSG_CLIENT_CALL_CONTROL               249
 474#define VNC_MSG_CLIENT_XVP                        250
 475#define VNC_MSG_CLIENT_SET_DESKTOP_SIZE           251
 476#define VNC_MSG_CLIENT_TIGHT                      252
 477#define VNC_MSG_CLIENT_GII                        253
 478#define VNC_MSG_CLIENT_VMWARE_1                   254
 479#define VNC_MSG_CLIENT_QEMU                       255
 480
 481/* Server -> Client message IDs */
 482#define VNC_MSG_SERVER_FRAMEBUFFER_UPDATE         0
 483#define VNC_MSG_SERVER_SET_COLOUR_MAP_ENTRIES     1
 484#define VNC_MSG_SERVER_BELL                       2
 485#define VNC_MSG_SERVER_CUT_TEXT                   3
 486#define VNC_MSG_SERVER_VMWARE_0                   127
 487#define VNC_MSG_SERVER_CALL_CONTROL               249
 488#define VNC_MSG_SERVER_XVP                        250
 489#define VNC_MSG_SERVER_TIGHT                      252
 490#define VNC_MSG_SERVER_GII                        253
 491#define VNC_MSG_SERVER_VMWARE_1                   254
 492#define VNC_MSG_SERVER_QEMU                       255
 493
 494
 495
 496/* QEMU client -> server message IDs */
 497#define VNC_MSG_CLIENT_QEMU_EXT_KEY_EVENT         0
 498#define VNC_MSG_CLIENT_QEMU_AUDIO                 1
 499
 500/* QEMU server -> client message IDs */
 501#define VNC_MSG_SERVER_QEMU_AUDIO                 1
 502
 503
 504
 505/* QEMU client -> server audio message IDs */
 506#define VNC_MSG_CLIENT_QEMU_AUDIO_ENABLE          0
 507#define VNC_MSG_CLIENT_QEMU_AUDIO_DISABLE         1
 508#define VNC_MSG_CLIENT_QEMU_AUDIO_SET_FORMAT      2
 509
 510/* QEMU server -> client audio message IDs */
 511#define VNC_MSG_SERVER_QEMU_AUDIO_END             0
 512#define VNC_MSG_SERVER_QEMU_AUDIO_BEGIN           1
 513#define VNC_MSG_SERVER_QEMU_AUDIO_DATA            2
 514
 515
 516/*****************************************************************************
 517 *
 518 * Internal APIs
 519 *
 520 *****************************************************************************/
 521
 522/* Event loop functions */
 523gboolean vnc_client_io(QIOChannel *ioc,
 524                       GIOCondition condition,
 525                       void *opaque);
 526
 527size_t vnc_client_read_buf(VncState *vs, uint8_t *data, size_t datalen);
 528size_t vnc_client_write_buf(VncState *vs, const uint8_t *data, size_t datalen);
 529
 530/* Protocol I/O functions */
 531void vnc_write(VncState *vs, const void *data, size_t len);
 532void vnc_write_u32(VncState *vs, uint32_t value);
 533void vnc_write_s32(VncState *vs, int32_t value);
 534void vnc_write_u16(VncState *vs, uint16_t value);
 535void vnc_write_u8(VncState *vs, uint8_t value);
 536void vnc_flush(VncState *vs);
 537void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting);
 538void vnc_disconnect_finish(VncState *vs);
 539void vnc_start_protocol(VncState *vs);
 540
 541
 542/* Buffer I/O functions */
 543uint32_t read_u32(uint8_t *data, size_t offset);
 544
 545/* Protocol stage functions */
 546void vnc_client_error(VncState *vs);
 547size_t vnc_client_io_error(VncState *vs, ssize_t ret, Error **errp);
 548
 549void start_client_init(VncState *vs);
 550void start_auth_vnc(VncState *vs);
 551
 552
 553/* Misc helpers */
 554
 555static inline uint32_t vnc_has_feature(VncState *vs, int feature) {
 556    return (vs->features & (1 << feature));
 557}
 558
 559/* Framebuffer */
 560void vnc_framebuffer_update(VncState *vs, int x, int y, int w, int h,
 561                            int32_t encoding);
 562
 563/* server fb is in PIXMAN_x8r8g8b8 */
 564#define VNC_SERVER_FB_FORMAT PIXMAN_FORMAT(32, PIXMAN_TYPE_ARGB, 0, 8, 8, 8)
 565#define VNC_SERVER_FB_BITS   (PIXMAN_FORMAT_BPP(VNC_SERVER_FB_FORMAT))
 566#define VNC_SERVER_FB_BYTES  ((VNC_SERVER_FB_BITS+7)/8)
 567
 568void *vnc_server_fb_ptr(VncDisplay *vd, int x, int y);
 569int vnc_server_fb_stride(VncDisplay *vd);
 570
 571void vnc_convert_pixel(VncState *vs, uint8_t *buf, uint32_t v);
 572double vnc_update_freq(VncState *vs, int x, int y, int w, int h);
 573void vnc_sent_lossy_rect(VncState *vs, int x, int y, int w, int h);
 574
 575/* Encodings */
 576int vnc_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 577
 578int vnc_raw_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 579
 580int vnc_hextile_send_framebuffer_update(VncState *vs, int x,
 581                                         int y, int w, int h);
 582void vnc_hextile_set_pixel_conversion(VncState *vs, int generic);
 583
 584void *vnc_zlib_zalloc(void *x, unsigned items, unsigned size);
 585void vnc_zlib_zfree(void *x, void *addr);
 586int vnc_zlib_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 587void vnc_zlib_clear(VncState *vs);
 588
 589int vnc_tight_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 590int vnc_tight_png_send_framebuffer_update(VncState *vs, int x, int y,
 591                                          int w, int h);
 592void vnc_tight_clear(VncState *vs);
 593
 594int vnc_zrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 595int vnc_zywrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 596void vnc_zrle_clear(VncState *vs);
 597
 598#endif /* QEMU_VNC_H */
 599