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