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