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