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 <zlib.h>
  38 #include <stdbool.h>
  39
  40 #include "keymaps.h"
  41 #include "vnc-palette.h"
  42 #include "vnc-enc-zrle.h"
  43 #include "qapi-types.h"
  44
  45 // #define _VNC_DEBUG 1
  46
  47 #ifdef _VNC_DEBUG
  48 #define VNC_DEBUG(fmt, ...) do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
  49 #else
  50 #define VNC_DEBUG(fmt, ...) do { } while (0)
  51 #endif
  52
  53 /*****************************************************************************
  54  *
  55  * Core data structures
  56  *
  57  *****************************************************************************/
  58
  59 typedef struct Buffer
  60 {
  61     size_t capacity;
  62     size_t offset;
  63     uint8_t *buffer;
  64 } Buffer;
  65
  66 typedef struct VncState VncState;
  67 typedef struct VncJob VncJob;
  68 typedef struct VncRect VncRect;
  69 typedef struct VncRectEntry VncRectEntry;
  70
  71 typedef int VncReadEvent(VncState *vs, uint8_t *data, size_t len);
  72
  73 typedef void VncWritePixels(VncState *vs, void *data, int size);
  74
  75 typedef void VncSendHextileTile(VncState *vs,
  76                                 int x, int y, int w, int h,
  77                                 void *last_bg,
  78                                 void *last_fg,
  79                                 int *has_bg, int *has_fg);
  80
  81 /* VNC_DIRTY_PIXELS_PER_BIT is the number of dirty pixels represented
  82  * by one bit in the dirty bitmap, should be a power of 2 */
  83 #define VNC_DIRTY_PIXELS_PER_BIT 16
  84
  85 /* VNC_MAX_WIDTH must be a multiple of VNC_DIRTY_PIXELS_PER_BIT. */
  86
  87 #define VNC_MAX_WIDTH ROUND_UP(2560, VNC_DIRTY_PIXELS_PER_BIT)
  88 #define VNC_MAX_HEIGHT 2048
  89
  90 /* VNC_DIRTY_BITS is the number of bits in the dirty bitmap. */
  91 #define VNC_DIRTY_BITS (VNC_MAX_WIDTH / VNC_DIRTY_PIXELS_PER_BIT)
  92
  93 /* VNC_DIRTY_BPL (BPL = bits per line) might be greater than
  94  * VNC_DIRTY_BITS due to alignment */
  95 #define VNC_DIRTY_BPL(x) (sizeof((x)->dirty) / VNC_MAX_HEIGHT * BITS_PER_BYTE)
  96
  97 #define VNC_STAT_RECT  64
  98 #define VNC_STAT_COLS (VNC_MAX_WIDTH / VNC_STAT_RECT)
  99 #define VNC_STAT_ROWS (VNC_MAX_HEIGHT / VNC_STAT_RECT)
 100
 101 #define VNC_AUTH_CHALLENGE_SIZE 16
 102
 103 typedef struct VncDisplay VncDisplay;
 104
 105 #include "vnc-auth-vencrypt.h"
 106 #ifdef CONFIG_VNC_SASL
 107 #include "vnc-auth-sasl.h"
 108 #endif
 109 #include "vnc-ws.h"
 110
 111 struct VncRectStat
 112 {
 113     /* time of last 10 updates, to find update frequency */
 114     struct timeval times[10];
 115     int idx;
 116
 117     double freq;        /* Update frequency (in Hz) */
 118     bool updated;       /* Already updated during this refresh */
 119 };
 120
 121 typedef struct VncRectStat VncRectStat;
 122
 123 struct VncSurface
 124 {
 125     struct timeval last_freq_check;
 126     DECLARE_BITMAP(dirty[VNC_MAX_HEIGHT],
 127                    VNC_MAX_WIDTH / VNC_DIRTY_PIXELS_PER_BIT);
 128     VncRectStat stats[VNC_STAT_ROWS][VNC_STAT_COLS];
 129     pixman_image_t *fb;
 130     pixman_format_code_t format;
 131 };
 132
 133 typedef enum VncShareMode {
 134     VNC_SHARE_MODE_CONNECTING = 1,
 135     VNC_SHARE_MODE_SHARED,
 136     VNC_SHARE_MODE_EXCLUSIVE,
 137     VNC_SHARE_MODE_DISCONNECTED,
 138 } VncShareMode;
 139
 140 typedef enum VncSharePolicy {
 141     VNC_SHARE_POLICY_IGNORE = 1,
 142     VNC_SHARE_POLICY_ALLOW_EXCLUSIVE,
 143     VNC_SHARE_POLICY_FORCE_SHARED,
 144 } VncSharePolicy;
 145
 146 struct VncDisplay
 147 {
 148     QTAILQ_HEAD(, VncState) clients;
 149     int num_connecting;
 150     int num_shared;
 151     int num_exclusive;
 152     int connections_limit;
 153     VncSharePolicy share_policy;
 154     int lsock;
 155     int lwebsock;
 156     bool ws_enabled;
 157     DisplaySurface *ds;
 158     DisplayChangeListener dcl;
 159     kbd_layout_t *kbd_layout;
 160     int lock_key_sync;
 161     QemuMutex mutex;
 162
 163     QEMUCursor *cursor;
 164     int cursor_msize;
 165     uint8_t *cursor_mask;
 166
 167     struct VncSurface guest;   /* guest visible surface (aka ds->surface) */
 168     pixman_image_t *server;    /* vnc server surface */
 169
 170     const char *id;
 171     QTAILQ_ENTRY(VncDisplay) next;
 172     bool enabled;
 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     bool ws_tls; /* 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 struct 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     int subauth; /* Used by VeNCrypt */
 283     char challenge[VNC_AUTH_CHALLENGE_SIZE];
 284     QCryptoTLSSession *tls;
 285 #ifdef CONFIG_VNC_SASL
 286     VncStateSASL sasl;
 287 #endif
 288     bool encode_ws;
 289     bool websocket;
 290
 291     VncClientInfo *info;
 292
 293     Buffer output;
 294     Buffer input;
 295     Buffer ws_input;
 296     Buffer ws_output;
 297     size_t ws_payload_remain;
 298     WsMask ws_payload_mask;
 299     /* current output mode information */
 300     VncWritePixels *write_pixels;
 301     PixelFormat client_pf;
 302     pixman_format_code_t client_format;
 303     bool client_be;
 304
 305     CaptureVoiceOut *audio_cap;
 306     struct audsettings as;
 307
 308     VncReadEvent *read_handler;
 309     size_t read_handler_expect;
 310     /* input */
 311     uint8_t modifiers_state[256];
 312     QEMUPutLEDEntry *led;
 313
 314     bool abort;
 315     bool initialized;
 316     QemuMutex output_mutex;
 317     QEMUBH *bh;
 318     Buffer jobs_buffer;
 319
 320     /* Encoding specific, if you add something here, don't forget to
 321      *  update vnc_async_encoding_start()
 322      */
 323     VncTight tight;
 324     VncZlib zlib;
 325     VncHextile hextile;
 326     VncZrle zrle;
 327     VncZywrle zywrle;
 328
 329     Notifier mouse_mode_notifier;
 330
 331     QTAILQ_ENTRY(VncState) next;
 332 };
 333
 334
 335 /*****************************************************************************
 336  *
 337  * Authentication modes
 338  *
 339  *****************************************************************************/
 340
 341 enum {
 342     VNC_AUTH_INVALID = 0,
 343     VNC_AUTH_NONE = 1,
 344     VNC_AUTH_VNC = 2,
 345     VNC_AUTH_RA2 = 5,
 346     VNC_AUTH_RA2NE = 6,
 347     VNC_AUTH_TIGHT = 16,
 348     VNC_AUTH_ULTRA = 17,
 349     VNC_AUTH_TLS = 18,      /* Supported in GTK-VNC & VINO */
 350     VNC_AUTH_VENCRYPT = 19, /* Supported in GTK-VNC & VeNCrypt */
 351     VNC_AUTH_SASL = 20,     /* Supported in GTK-VNC & VINO */
 352 };
 353
 354 enum {
 355     VNC_AUTH_VENCRYPT_PLAIN = 256,
 356     VNC_AUTH_VENCRYPT_TLSNONE = 257,
 357     VNC_AUTH_VENCRYPT_TLSVNC = 258,
 358     VNC_AUTH_VENCRYPT_TLSPLAIN = 259,
 359     VNC_AUTH_VENCRYPT_X509NONE = 260,
 360     VNC_AUTH_VENCRYPT_X509VNC = 261,
 361     VNC_AUTH_VENCRYPT_X509PLAIN = 262,
 362     VNC_AUTH_VENCRYPT_X509SASL = 263,
 363     VNC_AUTH_VENCRYPT_TLSSASL = 264,
 364 };
 365
 366
 367 /*****************************************************************************
 368  *
 369  * Encoding types
 370  *
 371  *****************************************************************************/
 372
 373 #define VNC_ENCODING_RAW                  0x00000000
 374 #define VNC_ENCODING_COPYRECT             0x00000001
 375 #define VNC_ENCODING_RRE                  0x00000002
 376 #define VNC_ENCODING_CORRE                0x00000004
 377 #define VNC_ENCODING_HEXTILE              0x00000005
 378 #define VNC_ENCODING_ZLIB                 0x00000006
 379 #define VNC_ENCODING_TIGHT                0x00000007
 380 #define VNC_ENCODING_ZLIBHEX              0x00000008
 381 #define VNC_ENCODING_TRLE                 0x0000000f
 382 #define VNC_ENCODING_ZRLE                 0x00000010
 383 #define VNC_ENCODING_ZYWRLE               0x00000011
 384 #define VNC_ENCODING_COMPRESSLEVEL0       0xFFFFFF00 /* -256 */
 385 #define VNC_ENCODING_QUALITYLEVEL0        0xFFFFFFE0 /* -32  */
 386 #define VNC_ENCODING_XCURSOR              0xFFFFFF10 /* -240 */
 387 #define VNC_ENCODING_RICH_CURSOR          0xFFFFFF11 /* -239 */
 388 #define VNC_ENCODING_POINTER_POS          0xFFFFFF18 /* -232 */
 389 #define VNC_ENCODING_LASTRECT             0xFFFFFF20 /* -224 */
 390 #define VNC_ENCODING_DESKTOPRESIZE        0xFFFFFF21 /* -223 */
 391 #define VNC_ENCODING_POINTER_TYPE_CHANGE  0XFFFFFEFF /* -257 */
 392 #define VNC_ENCODING_EXT_KEY_EVENT        0XFFFFFEFE /* -258 */
 393 #define VNC_ENCODING_AUDIO                0XFFFFFEFD /* -259 */
 394 #define VNC_ENCODING_TIGHT_PNG            0xFFFFFEFC /* -260 */
 395 #define VNC_ENCODING_LED_STATE            0XFFFFFEFB /* -261 */
 396 #define VNC_ENCODING_WMVi                 0x574D5669
 397
 398 /*****************************************************************************
 399  *
 400  * Other tight constants
 401  *
 402  *****************************************************************************/
 403
 404 /*
 405  * Vendors known by TightVNC: standard VNC/RealVNC, TridiaVNC, and TightVNC.
 406  */
 407
 408 #define VNC_TIGHT_CCB_RESET_MASK   (0x0f)
 409 #define VNC_TIGHT_CCB_TYPE_MASK    (0x0f << 4)
 410 #define VNC_TIGHT_CCB_TYPE_FILL    (0x08 << 4)
 411 #define VNC_TIGHT_CCB_TYPE_JPEG    (0x09 << 4)
 412 #define VNC_TIGHT_CCB_TYPE_PNG     (0x0A << 4)
 413 #define VNC_TIGHT_CCB_BASIC_MAX    (0x07 << 4)
 414 #define VNC_TIGHT_CCB_BASIC_ZLIB   (0x03 << 4)
 415 #define VNC_TIGHT_CCB_BASIC_FILTER (0x04 << 4)
 416
 417 /*****************************************************************************
 418  *
 419  * Features
 420  *
 421  *****************************************************************************/
 422
 423 #define VNC_FEATURE_RESIZE                   0
 424 #define VNC_FEATURE_HEXTILE                  1
 425 #define VNC_FEATURE_POINTER_TYPE_CHANGE      2
 426 #define VNC_FEATURE_WMVI                     3
 427 #define VNC_FEATURE_TIGHT                    4
 428 #define VNC_FEATURE_ZLIB                     5
 429 #define VNC_FEATURE_COPYRECT                 6
 430 #define VNC_FEATURE_RICH_CURSOR              7
 431 #define VNC_FEATURE_TIGHT_PNG                8
 432 #define VNC_FEATURE_ZRLE                     9
 433 #define VNC_FEATURE_ZYWRLE                  10
 434 #define VNC_FEATURE_LED_STATE               11
 435
 436 #define VNC_FEATURE_RESIZE_MASK              (1 << VNC_FEATURE_RESIZE)
 437 #define VNC_FEATURE_HEXTILE_MASK             (1 << VNC_FEATURE_HEXTILE)
 438 #define VNC_FEATURE_POINTER_TYPE_CHANGE_MASK (1 << VNC_FEATURE_POINTER_TYPE_CHANGE)
 439 #define VNC_FEATURE_WMVI_MASK                (1 << VNC_FEATURE_WMVI)
 440 #define VNC_FEATURE_TIGHT_MASK               (1 << VNC_FEATURE_TIGHT)
 441 #define VNC_FEATURE_ZLIB_MASK                (1 << VNC_FEATURE_ZLIB)
 442 #define VNC_FEATURE_COPYRECT_MASK            (1 << VNC_FEATURE_COPYRECT)
 443 #define VNC_FEATURE_RICH_CURSOR_MASK         (1 << VNC_FEATURE_RICH_CURSOR)
 444 #define VNC_FEATURE_TIGHT_PNG_MASK           (1 << VNC_FEATURE_TIGHT_PNG)
 445 #define VNC_FEATURE_ZRLE_MASK                (1 << VNC_FEATURE_ZRLE)
 446 #define VNC_FEATURE_ZYWRLE_MASK              (1 << VNC_FEATURE_ZYWRLE)
 447 #define VNC_FEATURE_LED_STATE_MASK           (1 << VNC_FEATURE_LED_STATE)
 448
 449
 450 /* Client -> Server message IDs */
 451 #define VNC_MSG_CLIENT_SET_PIXEL_FORMAT           0
 452 #define VNC_MSG_CLIENT_SET_ENCODINGS              2
 453 #define VNC_MSG_CLIENT_FRAMEBUFFER_UPDATE_REQUEST 3
 454 #define VNC_MSG_CLIENT_KEY_EVENT                  4
 455 #define VNC_MSG_CLIENT_POINTER_EVENT              5
 456 #define VNC_MSG_CLIENT_CUT_TEXT                   6
 457 #define VNC_MSG_CLIENT_VMWARE_0                   127
 458 #define VNC_MSG_CLIENT_CALL_CONTROL               249
 459 #define VNC_MSG_CLIENT_XVP                        250
 460 #define VNC_MSG_CLIENT_SET_DESKTOP_SIZE           251
 461 #define VNC_MSG_CLIENT_TIGHT                      252
 462 #define VNC_MSG_CLIENT_GII                        253
 463 #define VNC_MSG_CLIENT_VMWARE_1                   254
 464 #define VNC_MSG_CLIENT_QEMU                       255
 465
 466 /* Server -> Client message IDs */
 467 #define VNC_MSG_SERVER_FRAMEBUFFER_UPDATE         0
 468 #define VNC_MSG_SERVER_SET_COLOUR_MAP_ENTRIES     1
 469 #define VNC_MSG_SERVER_BELL                       2
 470 #define VNC_MSG_SERVER_CUT_TEXT                   3
 471 #define VNC_MSG_SERVER_VMWARE_0                   127
 472 #define VNC_MSG_SERVER_CALL_CONTROL               249
 473 #define VNC_MSG_SERVER_XVP                        250
 474 #define VNC_MSG_SERVER_TIGHT                      252
 475 #define VNC_MSG_SERVER_GII                        253
 476 #define VNC_MSG_SERVER_VMWARE_1                   254
 477 #define VNC_MSG_SERVER_QEMU                       255
 478
 479
 480
 481 /* QEMU client -> server message IDs */
 482 #define VNC_MSG_CLIENT_QEMU_EXT_KEY_EVENT         0
 483 #define VNC_MSG_CLIENT_QEMU_AUDIO                 1
 484
 485 /* QEMU server -> client message IDs */
 486 #define VNC_MSG_SERVER_QEMU_AUDIO                 1
 487
 488
 489
 490 /* QEMU client -> server audio message IDs */
 491 #define VNC_MSG_CLIENT_QEMU_AUDIO_ENABLE          0
 492 #define VNC_MSG_CLIENT_QEMU_AUDIO_DISABLE         1
 493 #define VNC_MSG_CLIENT_QEMU_AUDIO_SET_FORMAT      2
 494
 495 /* QEMU server -> client audio message IDs */
 496 #define VNC_MSG_SERVER_QEMU_AUDIO_END             0
 497 #define VNC_MSG_SERVER_QEMU_AUDIO_BEGIN           1
 498 #define VNC_MSG_SERVER_QEMU_AUDIO_DATA            2
 499
 500
 501 /*****************************************************************************
 502  *
 503  * Internal APIs
 504  *
 505  *****************************************************************************/
 506
 507 /* Event loop functions */
 508 void vnc_client_read(void *opaque);
 509 void vnc_client_write(void *opaque);
 510
 511 ssize_t vnc_client_read_buf(VncState *vs, uint8_t *data, size_t datalen);
 512 ssize_t vnc_client_write_buf(VncState *vs, const uint8_t *data, size_t datalen);
 513 ssize_t vnc_tls_pull(char *buf, size_t len, void *opaque);
 514 ssize_t vnc_tls_push(const char *buf, size_t len, void *opaque);
 515
 516 /* Protocol I/O functions */
 517 void vnc_write(VncState *vs, const void *data, size_t len);
 518 void vnc_write_u32(VncState *vs, uint32_t value);
 519 void vnc_write_s32(VncState *vs, int32_t value);
 520 void vnc_write_u16(VncState *vs, uint16_t value);
 521 void vnc_write_u8(VncState *vs, uint8_t value);
 522 void vnc_flush(VncState *vs);
 523 void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting);
 524 void vnc_disconnect_finish(VncState *vs);
 525 void vnc_init_state(VncState *vs);
 526
 527
 528 /* Buffer I/O functions */
 529 uint32_t read_u32(uint8_t *data, size_t offset);
 530
 531 /* Protocol stage functions */
 532 void vnc_client_error(VncState *vs);
 533 ssize_t vnc_client_io_error(VncState *vs, ssize_t ret, int last_errno);
 534
 535 void start_client_init(VncState *vs);
 536 void start_auth_vnc(VncState *vs);
 537
 538 /* Buffer management */
 539 void buffer_reserve(Buffer *buffer, size_t len);
 540 void buffer_reset(Buffer *buffer);
 541 void buffer_free(Buffer *buffer);
 542 void buffer_append(Buffer *buffer, const void *data, size_t len);
 543 void buffer_advance(Buffer *buf, size_t len);
 544 uint8_t *buffer_end(Buffer *buffer);
 545
 546
 547 /* Misc helpers */
 548
 549 char *vnc_socket_local_addr(const char *format, int fd);
 550 char *vnc_socket_remote_addr(const char *format, int fd);
 551
 552 static inline uint32_t vnc_has_feature(VncState *vs, int feature) {
 553     return (vs->features & (1 << feature));
 554 }
 555
 556 /* Framebuffer */
 557 void vnc_framebuffer_update(VncState *vs, int x, int y, int w, int h,
 558                             int32_t encoding);
 559
 560 /* server fb is in PIXMAN_x8r8g8b8 */
 561 #define VNC_SERVER_FB_FORMAT PIXMAN_FORMAT(32, PIXMAN_TYPE_ARGB, 0, 8, 8, 8)
 562 #define VNC_SERVER_FB_BITS   (PIXMAN_FORMAT_BPP(VNC_SERVER_FB_FORMAT))
 563 #define VNC_SERVER_FB_BYTES  ((VNC_SERVER_FB_BITS+7)/8)
 564
 565 void *vnc_server_fb_ptr(VncDisplay *vd, int x, int y);
 566 int vnc_server_fb_stride(VncDisplay *vd);
 567
 568 void vnc_convert_pixel(VncState *vs, uint8_t *buf, uint32_t v);
 569 double vnc_update_freq(VncState *vs, int x, int y, int w, int h);
 570 void vnc_sent_lossy_rect(VncState *vs, int x, int y, int w, int h);
 571
 572 /* Encodings */
 573 int vnc_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 574
 575 int vnc_raw_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 576
 577 int vnc_hextile_send_framebuffer_update(VncState *vs, int x,
 578                                          int y, int w, int h);
 579 void vnc_hextile_set_pixel_conversion(VncState *vs, int generic);
 580
 581 void *vnc_zlib_zalloc(void *x, unsigned items, unsigned size);
 582 void vnc_zlib_zfree(void *x, void *addr);
 583 int vnc_zlib_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 584 void vnc_zlib_clear(VncState *vs);
 585
 586 int vnc_tight_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 587 int vnc_tight_png_send_framebuffer_update(VncState *vs, int x, int y,
 588                                           int w, int h);
 589 void vnc_tight_clear(VncState *vs);
 590
 591 int vnc_zrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 592 int vnc_zywrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 593 void vnc_zrle_clear(VncState *vs);
 594
 595 #endif /* __QEMU_VNC_H */