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 <zlib.h>
  37#include <stdbool.h>
  38
  39#include "keymaps.h"
  40#include "vnc-palette.h"
  41#include "vnc-enc-zrle.h"
  42#include "qapi-types.h"
  43
  44// #define _VNC_DEBUG 1
  45
  46#ifdef _VNC_DEBUG
  47#define VNC_DEBUG(fmt, ...) do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
  48#else
  49#define VNC_DEBUG(fmt, ...) do { } while (0)
  50#endif
  51
  52/*****************************************************************************
  53 *
  54 * Core data structures
  55 *
  56 *****************************************************************************/
  57
  58typedef struct Buffer
  59{
  60    size_t capacity;
  61    size_t offset;
  62    uint8_t *buffer;
  63} Buffer;
  64
  65typedef struct VncState VncState;
  66typedef struct VncJob VncJob;
  67typedef struct VncRect VncRect;
  68typedef struct VncRectEntry VncRectEntry;
  69
  70typedef int VncReadEvent(VncState *vs, uint8_t *data, size_t len);
  71
  72typedef void VncWritePixels(VncState *vs, void *data, int size);
  73
  74typedef void VncSendHextileTile(VncState *vs,
  75                                int x, int y, int w, int h,
  76                                void *last_bg,
  77                                void *last_fg,
  78                                int *has_bg, int *has_fg);
  79
  80/* VNC_DIRTY_PIXELS_PER_BIT is the number of dirty pixels represented
  81 * by one bit in the dirty bitmap, should be a power of 2 */
  82#define VNC_DIRTY_PIXELS_PER_BIT 16
  83
  84/* VNC_MAX_WIDTH must be a multiple of VNC_DIRTY_PIXELS_PER_BIT. */
  85
  86#define VNC_MAX_WIDTH ROUND_UP(2560, VNC_DIRTY_PIXELS_PER_BIT)
  87#define VNC_MAX_HEIGHT 2048
  88
  89/* VNC_DIRTY_BITS is the number of bits in the dirty bitmap. */
  90#define VNC_DIRTY_BITS (VNC_MAX_WIDTH / VNC_DIRTY_PIXELS_PER_BIT)
  91
  92/* VNC_DIRTY_BPL (BPL = bits per line) might be greater than
  93 * VNC_DIRTY_BITS due to alignment */
  94#define VNC_DIRTY_BPL(x) (sizeof((x)->dirty) / VNC_MAX_HEIGHT * BITS_PER_BYTE)
  95
  96#define VNC_STAT_RECT  64
  97#define VNC_STAT_COLS (VNC_MAX_WIDTH / VNC_STAT_RECT)
  98#define VNC_STAT_ROWS (VNC_MAX_HEIGHT / VNC_STAT_RECT)
  99
 100#define VNC_AUTH_CHALLENGE_SIZE 16
 101
 102typedef struct VncDisplay VncDisplay;
 103
 104#ifdef CONFIG_VNC_TLS
 105#include "vnc-tls.h"
 106#include "vnc-auth-vencrypt.h"
 107#endif
 108#ifdef CONFIG_VNC_SASL
 109#include "vnc-auth-sasl.h"
 110#endif
 111#ifdef CONFIG_VNC_WS
 112#include "vnc-ws.h"
 113#endif
 114
 115struct VncRectStat
 116{
 117    /* time of last 10 updates, to find update frequency */
 118    struct timeval times[10];
 119    int idx;
 120
 121    double freq;        /* Update frequency (in Hz) */
 122    bool updated;       /* Already updated during this refresh */
 123};
 124
 125typedef struct VncRectStat VncRectStat;
 126
 127struct VncSurface
 128{
 129    struct timeval last_freq_check;
 130    DECLARE_BITMAP(dirty[VNC_MAX_HEIGHT],
 131                   VNC_MAX_WIDTH / VNC_DIRTY_PIXELS_PER_BIT);
 132    VncRectStat stats[VNC_STAT_ROWS][VNC_STAT_COLS];
 133    pixman_image_t *fb;
 134    pixman_format_code_t format;
 135};
 136
 137typedef enum VncShareMode {
 138    VNC_SHARE_MODE_CONNECTING = 1,
 139    VNC_SHARE_MODE_SHARED,
 140    VNC_SHARE_MODE_EXCLUSIVE,
 141    VNC_SHARE_MODE_DISCONNECTED,
 142} VncShareMode;
 143
 144typedef enum VncSharePolicy {
 145    VNC_SHARE_POLICY_IGNORE = 1,
 146    VNC_SHARE_POLICY_ALLOW_EXCLUSIVE,
 147    VNC_SHARE_POLICY_FORCE_SHARED,
 148} VncSharePolicy;
 149
 150struct VncDisplay
 151{
 152    QTAILQ_HEAD(, VncState) clients;
 153    int num_exclusive;
 154    VncSharePolicy share_policy;
 155    int lsock;
 156#ifdef CONFIG_VNC_WS
 157    int lwebsock;
 158    bool websocket;
 159    char *ws_display;
 160#endif
 161    DisplaySurface *ds;
 162    DisplayChangeListener dcl;
 163    kbd_layout_t *kbd_layout;
 164    int lock_key_sync;
 165    QemuMutex mutex;
 166
 167    QEMUCursor *cursor;
 168    int cursor_msize;
 169    uint8_t *cursor_mask;
 170
 171    struct VncSurface guest;   /* guest visible surface (aka ds->surface) */
 172    pixman_image_t *server;    /* vnc server surface */
 173
 174    char *display;
 175    char *password;
 176    time_t expires;
 177    int auth;
 178    bool lossy;
 179    bool non_adaptive;
 180#ifdef CONFIG_VNC_TLS
 181    int subauth; /* Used by VeNCrypt */
 182    VncDisplayTLS tls;
 183#endif
 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
 255struct VncState
 256{
 257    int csock;
 258
 259    DECLARE_BITMAP(dirty[VNC_MAX_HEIGHT], VNC_DIRTY_BITS);
 260    uint8_t **lossy_rect; /* Not an Array to avoid costly memcpy in
 261                           * vnc-jobs-async.c */
 262
 263    VncDisplay *vd;
 264    int need_update;
 265    int force_update;
 266    int has_dirty;
 267    uint32_t features;
 268    int absolute;
 269    int last_x;
 270    int last_y;
 271    uint32_t last_bmask;
 272    int client_width;
 273    int client_height;
 274    VncShareMode share_mode;
 275
 276    uint32_t vnc_encoding;
 277
 278    int major;
 279    int minor;
 280
 281    int auth;
 282    char challenge[VNC_AUTH_CHALLENGE_SIZE];
 283#ifdef CONFIG_VNC_TLS
 284    int subauth; /* Used by VeNCrypt */
 285    VncStateTLS tls;
 286#endif
 287#ifdef CONFIG_VNC_SASL
 288    VncStateSASL sasl;
 289#endif
 290#ifdef CONFIG_VNC_WS
 291#ifdef CONFIG_VNC_TLS
 292    VncStateTLS ws_tls;
 293#endif /* CONFIG_VNC_TLS */
 294    bool encode_ws;
 295    bool websocket;
 296#endif /* CONFIG_VNC_WS */
 297
 298    VncClientInfo *info;
 299
 300    Buffer output;
 301    Buffer input;
 302#ifdef CONFIG_VNC_WS
 303    Buffer ws_input;
 304    Buffer ws_output;
 305#endif
 306    /* current output mode information */
 307    VncWritePixels *write_pixels;
 308    PixelFormat client_pf;
 309    pixman_format_code_t client_format;
 310    bool client_be;
 311
 312    CaptureVoiceOut *audio_cap;
 313    struct audsettings as;
 314
 315    VncReadEvent *read_handler;
 316    size_t read_handler_expect;
 317    /* input */
 318    uint8_t modifiers_state[256];
 319    QEMUPutLEDEntry *led;
 320
 321    bool abort;
 322    bool initialized;
 323    QemuMutex output_mutex;
 324    QEMUBH *bh;
 325    Buffer jobs_buffer;
 326
 327    /* Encoding specific, if you add something here, don't forget to
 328     *  update vnc_async_encoding_start()
 329     */
 330    VncTight tight;
 331    VncZlib zlib;
 332    VncHextile hextile;
 333    VncZrle zrle;
 334    VncZywrle zywrle;
 335
 336    Notifier mouse_mode_notifier;
 337
 338    QTAILQ_ENTRY(VncState) next;
 339};
 340
 341
 342/*****************************************************************************
 343 *
 344 * Authentication modes
 345 *
 346 *****************************************************************************/
 347
 348enum {
 349    VNC_AUTH_INVALID = 0,
 350    VNC_AUTH_NONE = 1,
 351    VNC_AUTH_VNC = 2,
 352    VNC_AUTH_RA2 = 5,
 353    VNC_AUTH_RA2NE = 6,
 354    VNC_AUTH_TIGHT = 16,
 355    VNC_AUTH_ULTRA = 17,
 356    VNC_AUTH_TLS = 18,      /* Supported in GTK-VNC & VINO */
 357    VNC_AUTH_VENCRYPT = 19, /* Supported in GTK-VNC & VeNCrypt */
 358    VNC_AUTH_SASL = 20,     /* Supported in GTK-VNC & VINO */
 359};
 360
 361enum {
 362    VNC_AUTH_VENCRYPT_PLAIN = 256,
 363    VNC_AUTH_VENCRYPT_TLSNONE = 257,
 364    VNC_AUTH_VENCRYPT_TLSVNC = 258,
 365    VNC_AUTH_VENCRYPT_TLSPLAIN = 259,
 366    VNC_AUTH_VENCRYPT_X509NONE = 260,
 367    VNC_AUTH_VENCRYPT_X509VNC = 261,
 368    VNC_AUTH_VENCRYPT_X509PLAIN = 262,
 369    VNC_AUTH_VENCRYPT_X509SASL = 263,
 370    VNC_AUTH_VENCRYPT_TLSSASL = 264,
 371};
 372
 373
 374/*****************************************************************************
 375 *
 376 * Encoding types
 377 *
 378 *****************************************************************************/
 379
 380#define VNC_ENCODING_RAW                  0x00000000
 381#define VNC_ENCODING_COPYRECT             0x00000001
 382#define VNC_ENCODING_RRE                  0x00000002
 383#define VNC_ENCODING_CORRE                0x00000004
 384#define VNC_ENCODING_HEXTILE              0x00000005
 385#define VNC_ENCODING_ZLIB                 0x00000006
 386#define VNC_ENCODING_TIGHT                0x00000007
 387#define VNC_ENCODING_ZLIBHEX              0x00000008
 388#define VNC_ENCODING_TRLE                 0x0000000f
 389#define VNC_ENCODING_ZRLE                 0x00000010
 390#define VNC_ENCODING_ZYWRLE               0x00000011
 391#define VNC_ENCODING_COMPRESSLEVEL0       0xFFFFFF00 /* -256 */
 392#define VNC_ENCODING_QUALITYLEVEL0        0xFFFFFFE0 /* -32  */
 393#define VNC_ENCODING_XCURSOR              0xFFFFFF10 /* -240 */
 394#define VNC_ENCODING_RICH_CURSOR          0xFFFFFF11 /* -239 */
 395#define VNC_ENCODING_POINTER_POS          0xFFFFFF18 /* -232 */
 396#define VNC_ENCODING_LASTRECT             0xFFFFFF20 /* -224 */
 397#define VNC_ENCODING_DESKTOPRESIZE        0xFFFFFF21 /* -223 */
 398#define VNC_ENCODING_POINTER_TYPE_CHANGE  0XFFFFFEFF /* -257 */
 399#define VNC_ENCODING_EXT_KEY_EVENT        0XFFFFFEFE /* -258 */
 400#define VNC_ENCODING_AUDIO                0XFFFFFEFD /* -259 */
 401#define VNC_ENCODING_TIGHT_PNG            0xFFFFFEFC /* -260 */
 402#define VNC_ENCODING_LED_STATE            0XFFFFFEFB /* -261 */
 403#define VNC_ENCODING_WMVi                 0x574D5669
 404
 405/*****************************************************************************
 406 *
 407 * Other tight constants
 408 *
 409 *****************************************************************************/
 410
 411/*
 412 * Vendors known by TightVNC: standard VNC/RealVNC, TridiaVNC, and TightVNC.
 413 */
 414
 415#define VNC_TIGHT_CCB_RESET_MASK   (0x0f)
 416#define VNC_TIGHT_CCB_TYPE_MASK    (0x0f << 4)
 417#define VNC_TIGHT_CCB_TYPE_FILL    (0x08 << 4)
 418#define VNC_TIGHT_CCB_TYPE_JPEG    (0x09 << 4)
 419#define VNC_TIGHT_CCB_TYPE_PNG     (0x0A << 4)
 420#define VNC_TIGHT_CCB_BASIC_MAX    (0x07 << 4)
 421#define VNC_TIGHT_CCB_BASIC_ZLIB   (0x03 << 4)
 422#define VNC_TIGHT_CCB_BASIC_FILTER (0x04 << 4)
 423
 424/*****************************************************************************
 425 *
 426 * Features
 427 *
 428 *****************************************************************************/
 429
 430#define VNC_FEATURE_RESIZE                   0
 431#define VNC_FEATURE_HEXTILE                  1
 432#define VNC_FEATURE_POINTER_TYPE_CHANGE      2
 433#define VNC_FEATURE_WMVI                     3
 434#define VNC_FEATURE_TIGHT                    4
 435#define VNC_FEATURE_ZLIB                     5
 436#define VNC_FEATURE_COPYRECT                 6
 437#define VNC_FEATURE_RICH_CURSOR              7
 438#define VNC_FEATURE_TIGHT_PNG                8
 439#define VNC_FEATURE_ZRLE                     9
 440#define VNC_FEATURE_ZYWRLE                  10
 441#define VNC_FEATURE_LED_STATE               11
 442
 443#define VNC_FEATURE_RESIZE_MASK              (1 << VNC_FEATURE_RESIZE)
 444#define VNC_FEATURE_HEXTILE_MASK             (1 << VNC_FEATURE_HEXTILE)
 445#define VNC_FEATURE_POINTER_TYPE_CHANGE_MASK (1 << VNC_FEATURE_POINTER_TYPE_CHANGE)
 446#define VNC_FEATURE_WMVI_MASK                (1 << VNC_FEATURE_WMVI)
 447#define VNC_FEATURE_TIGHT_MASK               (1 << VNC_FEATURE_TIGHT)
 448#define VNC_FEATURE_ZLIB_MASK                (1 << VNC_FEATURE_ZLIB)
 449#define VNC_FEATURE_COPYRECT_MASK            (1 << VNC_FEATURE_COPYRECT)
 450#define VNC_FEATURE_RICH_CURSOR_MASK         (1 << VNC_FEATURE_RICH_CURSOR)
 451#define VNC_FEATURE_TIGHT_PNG_MASK           (1 << VNC_FEATURE_TIGHT_PNG)
 452#define VNC_FEATURE_ZRLE_MASK                (1 << VNC_FEATURE_ZRLE)
 453#define VNC_FEATURE_ZYWRLE_MASK              (1 << VNC_FEATURE_ZYWRLE)
 454#define VNC_FEATURE_LED_STATE_MASK           (1 << VNC_FEATURE_LED_STATE)
 455
 456
 457/* Client -> Server message IDs */
 458#define VNC_MSG_CLIENT_SET_PIXEL_FORMAT           0
 459#define VNC_MSG_CLIENT_SET_ENCODINGS              2
 460#define VNC_MSG_CLIENT_FRAMEBUFFER_UPDATE_REQUEST 3
 461#define VNC_MSG_CLIENT_KEY_EVENT                  4
 462#define VNC_MSG_CLIENT_POINTER_EVENT              5
 463#define VNC_MSG_CLIENT_CUT_TEXT                   6
 464#define VNC_MSG_CLIENT_VMWARE_0                   127
 465#define VNC_MSG_CLIENT_CALL_CONTROL               249
 466#define VNC_MSG_CLIENT_XVP                        250
 467#define VNC_MSG_CLIENT_SET_DESKTOP_SIZE           251
 468#define VNC_MSG_CLIENT_TIGHT                      252
 469#define VNC_MSG_CLIENT_GII                        253
 470#define VNC_MSG_CLIENT_VMWARE_1                   254
 471#define VNC_MSG_CLIENT_QEMU                       255
 472
 473/* Server -> Client message IDs */
 474#define VNC_MSG_SERVER_FRAMEBUFFER_UPDATE         0
 475#define VNC_MSG_SERVER_SET_COLOUR_MAP_ENTRIES     1
 476#define VNC_MSG_SERVER_BELL                       2
 477#define VNC_MSG_SERVER_CUT_TEXT                   3
 478#define VNC_MSG_SERVER_VMWARE_0                   127
 479#define VNC_MSG_SERVER_CALL_CONTROL               249
 480#define VNC_MSG_SERVER_XVP                        250
 481#define VNC_MSG_SERVER_TIGHT                      252
 482#define VNC_MSG_SERVER_GII                        253
 483#define VNC_MSG_SERVER_VMWARE_1                   254
 484#define VNC_MSG_SERVER_QEMU                       255
 485
 486
 487
 488/* QEMU client -> server message IDs */
 489#define VNC_MSG_CLIENT_QEMU_EXT_KEY_EVENT         0
 490#define VNC_MSG_CLIENT_QEMU_AUDIO                 1
 491
 492/* QEMU server -> client message IDs */
 493#define VNC_MSG_SERVER_QEMU_AUDIO                 1
 494
 495
 496
 497/* QEMU client -> server audio message IDs */
 498#define VNC_MSG_CLIENT_QEMU_AUDIO_ENABLE          0
 499#define VNC_MSG_CLIENT_QEMU_AUDIO_DISABLE         1
 500#define VNC_MSG_CLIENT_QEMU_AUDIO_SET_FORMAT      2
 501
 502/* QEMU server -> client audio message IDs */
 503#define VNC_MSG_SERVER_QEMU_AUDIO_END             0
 504#define VNC_MSG_SERVER_QEMU_AUDIO_BEGIN           1
 505#define VNC_MSG_SERVER_QEMU_AUDIO_DATA            2
 506
 507
 508/*****************************************************************************
 509 *
 510 * Internal APIs
 511 *
 512 *****************************************************************************/
 513
 514/* Event loop functions */
 515void vnc_client_read(void *opaque);
 516void vnc_client_write(void *opaque);
 517
 518long vnc_client_read_buf(VncState *vs, uint8_t *data, size_t datalen);
 519long vnc_client_write_buf(VncState *vs, const uint8_t *data, size_t datalen);
 520
 521/* Protocol I/O functions */
 522void vnc_write(VncState *vs, const void *data, size_t len);
 523void vnc_write_u32(VncState *vs, uint32_t value);
 524void vnc_write_s32(VncState *vs, int32_t value);
 525void vnc_write_u16(VncState *vs, uint16_t value);
 526void vnc_write_u8(VncState *vs, uint8_t value);
 527void vnc_flush(VncState *vs);
 528void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting);
 529void vnc_disconnect_finish(VncState *vs);
 530void vnc_init_state(VncState *vs);
 531
 532
 533/* Buffer I/O functions */
 534uint32_t read_u32(uint8_t *data, size_t offset);
 535
 536/* Protocol stage functions */
 537void vnc_client_error(VncState *vs);
 538int vnc_client_io_error(VncState *vs, int ret, int last_errno);
 539
 540void start_client_init(VncState *vs);
 541void start_auth_vnc(VncState *vs);
 542
 543/* Buffer management */
 544void buffer_reserve(Buffer *buffer, size_t len);
 545void buffer_reset(Buffer *buffer);
 546void buffer_free(Buffer *buffer);
 547void buffer_append(Buffer *buffer, const void *data, size_t len);
 548void buffer_advance(Buffer *buf, size_t len);
 549uint8_t *buffer_end(Buffer *buffer);
 550
 551
 552/* Misc helpers */
 553
 554char *vnc_socket_local_addr(const char *format, int fd);
 555char *vnc_socket_remote_addr(const char *format, int fd);
 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