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 "monitor/monitor.h"
  35 #include "audio/audio.h"
  36 #include "qemu/bitmap.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
  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
  58 typedef struct Buffer
  59 {
  60     size_t capacity;
  61     size_t offset;
  62     uint8_t *buffer;
  63 } Buffer;
  64
  65 typedef struct VncState VncState;
  66 typedef struct VncJob VncJob;
  67 typedef struct VncRect VncRect;
  68 typedef struct VncRectEntry VncRectEntry;
  69
  70 typedef int VncReadEvent(VncState *vs, uint8_t *data, size_t len);
  71
  72 typedef void VncWritePixels(VncState *vs, void *data, int size);
  73
  74 typedef 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_MAX_WIDTH must be a multiple of 16. */
  81 #define VNC_MAX_WIDTH 2560
  82 #define VNC_MAX_HEIGHT 2048
  83
  84 /* VNC_DIRTY_PIXELS_PER_BIT is the number of dirty pixels represented
  85  * by one bit in the dirty bitmap */
  86 #define VNC_DIRTY_PIXELS_PER_BIT 16
  87
  88 /* VNC_DIRTY_BITS is the number of bits in the dirty bitmap. */
  89 #define VNC_DIRTY_BITS (VNC_MAX_WIDTH / VNC_DIRTY_PIXELS_PER_BIT)
  90
  91 /* VNC_DIRTY_BPL (BPL = bits per line) might be greater than
  92  * VNC_DIRTY_BITS due to alignment */
  93 #define VNC_DIRTY_BPL(x) (sizeof((x)->dirty) / VNC_MAX_HEIGHT * BITS_PER_BYTE)
  94
  95 #define VNC_STAT_RECT  64
  96 #define VNC_STAT_COLS (VNC_MAX_WIDTH / VNC_STAT_RECT)
  97 #define VNC_STAT_ROWS (VNC_MAX_HEIGHT / VNC_STAT_RECT)
  98
  99 #define VNC_AUTH_CHALLENGE_SIZE 16
 100
 101 typedef struct VncDisplay VncDisplay;
 102
 103 #ifdef CONFIG_VNC_TLS
 104 #include "vnc-tls.h"
 105 #include "vnc-auth-vencrypt.h"
 106 #endif
 107 #ifdef CONFIG_VNC_SASL
 108 #include "vnc-auth-sasl.h"
 109 #endif
 110 #ifdef CONFIG_VNC_WS
 111 #include "vnc-ws.h"
 112 #endif
 113
 114 struct VncRectStat
 115 {
 116     /* time of last 10 updates, to find update frequency */
 117     struct timeval times[10];
 118     int idx;
 119
 120     double freq;        /* Update frequency (in Hz) */
 121     bool updated;       /* Already updated during this refresh */
 122 };
 123
 124 typedef struct VncRectStat VncRectStat;
 125
 126 struct VncSurface
 127 {
 128     struct timeval last_freq_check;
 129     DECLARE_BITMAP(dirty[VNC_MAX_HEIGHT], VNC_MAX_WIDTH / 16);
 130     VncRectStat stats[VNC_STAT_ROWS][VNC_STAT_COLS];
 131     pixman_image_t *fb;
 132     pixman_format_code_t format;
 133 };
 134
 135 typedef enum VncShareMode {
 136     VNC_SHARE_MODE_CONNECTING = 1,
 137     VNC_SHARE_MODE_SHARED,
 138     VNC_SHARE_MODE_EXCLUSIVE,
 139     VNC_SHARE_MODE_DISCONNECTED,
 140 } VncShareMode;
 141
 142 typedef enum VncSharePolicy {
 143     VNC_SHARE_POLICY_IGNORE = 1,
 144     VNC_SHARE_POLICY_ALLOW_EXCLUSIVE,
 145     VNC_SHARE_POLICY_FORCE_SHARED,
 146 } VncSharePolicy;
 147
 148 struct VncDisplay
 149 {
 150     QTAILQ_HEAD(, VncState) clients;
 151     int num_exclusive;
 152     VncSharePolicy share_policy;
 153     int lsock;
 154 #ifdef CONFIG_VNC_WS
 155     int lwebsock;
 156     bool websocket;
 157     char *ws_display;
 158 #endif
 159     DisplaySurface *ds;
 160     DisplayChangeListener dcl;
 161     kbd_layout_t *kbd_layout;
 162     int lock_key_sync;
 163     QemuMutex mutex;
 164
 165     QEMUCursor *cursor;
 166     int cursor_msize;
 167     uint8_t *cursor_mask;
 168
 169     struct VncSurface guest;   /* guest visible surface (aka ds->surface) */
 170     pixman_image_t *server;    /* vnc server surface */
 171
 172     char *display;
 173     char *password;
 174     time_t expires;
 175     int auth;
 176     bool lossy;
 177     bool non_adaptive;
 178 #ifdef CONFIG_VNC_TLS
 179     int subauth; /* Used by VeNCrypt */
 180     VncDisplayTLS tls;
 181 #endif
 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     int csock;
 256
 257     DECLARE_BITMAP(dirty[VNC_MAX_HEIGHT], VNC_DIRTY_BITS);
 258     uint8_t **lossy_rect; /* Not an Array to avoid costly memcpy in
 259                            * vnc-jobs-async.c */
 260
 261     VncDisplay *vd;
 262     int need_update;
 263     int force_update;
 264     uint32_t features;
 265     int absolute;
 266     int last_x;
 267     int last_y;
 268     uint32_t last_bmask;
 269     int client_width;
 270     int client_height;
 271     VncShareMode share_mode;
 272
 273     uint32_t vnc_encoding;
 274
 275     int major;
 276     int minor;
 277
 278     int auth;
 279     char challenge[VNC_AUTH_CHALLENGE_SIZE];
 280 #ifdef CONFIG_VNC_TLS
 281     int subauth; /* Used by VeNCrypt */
 282     VncStateTLS tls;
 283 #endif
 284 #ifdef CONFIG_VNC_SASL
 285     VncStateSASL sasl;
 286 #endif
 287 #ifdef CONFIG_VNC_WS
 288 #ifdef CONFIG_VNC_TLS
 289     VncStateTLS ws_tls;
 290 #endif /* CONFIG_VNC_TLS */
 291     bool encode_ws;
 292     bool websocket;
 293 #endif /* CONFIG_VNC_WS */
 294
 295     QObject *info;
 296
 297     Buffer output;
 298     Buffer input;
 299 #ifdef CONFIG_VNC_WS
 300     Buffer ws_input;
 301     Buffer ws_output;
 302 #endif
 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     QEMUPutLEDEntry *led;
 317
 318     bool abort;
 319     bool initialized;
 320     QemuMutex output_mutex;
 321     QEMUBH *bh;
 322     Buffer jobs_buffer;
 323
 324     /* Encoding specific, if you add something here, don't forget to
 325      *  update vnc_async_encoding_start()
 326      */
 327     VncTight tight;
 328     VncZlib zlib;
 329     VncHextile hextile;
 330     VncZrle zrle;
 331     VncZywrle zywrle;
 332
 333     Notifier mouse_mode_notifier;
 334
 335     QTAILQ_ENTRY(VncState) next;
 336 };
 337
 338
 339 /*****************************************************************************
 340  *
 341  * Authentication modes
 342  *
 343  *****************************************************************************/
 344
 345 enum {
 346     VNC_AUTH_INVALID = 0,
 347     VNC_AUTH_NONE = 1,
 348     VNC_AUTH_VNC = 2,
 349     VNC_AUTH_RA2 = 5,
 350     VNC_AUTH_RA2NE = 6,
 351     VNC_AUTH_TIGHT = 16,
 352     VNC_AUTH_ULTRA = 17,
 353     VNC_AUTH_TLS = 18,      /* Supported in GTK-VNC & VINO */
 354     VNC_AUTH_VENCRYPT = 19, /* Supported in GTK-VNC & VeNCrypt */
 355     VNC_AUTH_SASL = 20,     /* Supported in GTK-VNC & VINO */
 356 };
 357
 358 enum {
 359     VNC_AUTH_VENCRYPT_PLAIN = 256,
 360     VNC_AUTH_VENCRYPT_TLSNONE = 257,
 361     VNC_AUTH_VENCRYPT_TLSVNC = 258,
 362     VNC_AUTH_VENCRYPT_TLSPLAIN = 259,
 363     VNC_AUTH_VENCRYPT_X509NONE = 260,
 364     VNC_AUTH_VENCRYPT_X509VNC = 261,
 365     VNC_AUTH_VENCRYPT_X509PLAIN = 262,
 366     VNC_AUTH_VENCRYPT_X509SASL = 263,
 367     VNC_AUTH_VENCRYPT_TLSSASL = 264,
 368 };
 369
 370
 371 /*****************************************************************************
 372  *
 373  * Encoding types
 374  *
 375  *****************************************************************************/
 376
 377 #define VNC_ENCODING_RAW                  0x00000000
 378 #define VNC_ENCODING_COPYRECT             0x00000001
 379 #define VNC_ENCODING_RRE                  0x00000002
 380 #define VNC_ENCODING_CORRE                0x00000004
 381 #define VNC_ENCODING_HEXTILE              0x00000005
 382 #define VNC_ENCODING_ZLIB                 0x00000006
 383 #define VNC_ENCODING_TIGHT                0x00000007
 384 #define VNC_ENCODING_ZLIBHEX              0x00000008
 385 #define VNC_ENCODING_TRLE                 0x0000000f
 386 #define VNC_ENCODING_ZRLE                 0x00000010
 387 #define VNC_ENCODING_ZYWRLE               0x00000011
 388 #define VNC_ENCODING_COMPRESSLEVEL0       0xFFFFFF00 /* -256 */
 389 #define VNC_ENCODING_QUALITYLEVEL0        0xFFFFFFE0 /* -32  */
 390 #define VNC_ENCODING_XCURSOR              0xFFFFFF10 /* -240 */
 391 #define VNC_ENCODING_RICH_CURSOR          0xFFFFFF11 /* -239 */
 392 #define VNC_ENCODING_POINTER_POS          0xFFFFFF18 /* -232 */
 393 #define VNC_ENCODING_LASTRECT             0xFFFFFF20 /* -224 */
 394 #define VNC_ENCODING_DESKTOPRESIZE        0xFFFFFF21 /* -223 */
 395 #define VNC_ENCODING_POINTER_TYPE_CHANGE  0XFFFFFEFF /* -257 */
 396 #define VNC_ENCODING_EXT_KEY_EVENT        0XFFFFFEFE /* -258 */
 397 #define VNC_ENCODING_AUDIO                0XFFFFFEFD /* -259 */
 398 #define VNC_ENCODING_TIGHT_PNG            0xFFFFFEFC /* -260 */
 399 #define VNC_ENCODING_LED_STATE            0XFFFFFEFB /* -261 */
 400 #define VNC_ENCODING_WMVi                 0x574D5669
 401
 402 /*****************************************************************************
 403  *
 404  * Other tight constants
 405  *
 406  *****************************************************************************/
 407
 408 /*
 409  * Vendors known by TightVNC: standard VNC/RealVNC, TridiaVNC, and TightVNC.
 410  */
 411
 412 #define VNC_TIGHT_CCB_RESET_MASK   (0x0f)
 413 #define VNC_TIGHT_CCB_TYPE_MASK    (0x0f << 4)
 414 #define VNC_TIGHT_CCB_TYPE_FILL    (0x08 << 4)
 415 #define VNC_TIGHT_CCB_TYPE_JPEG    (0x09 << 4)
 416 #define VNC_TIGHT_CCB_TYPE_PNG     (0x0A << 4)
 417 #define VNC_TIGHT_CCB_BASIC_MAX    (0x07 << 4)
 418 #define VNC_TIGHT_CCB_BASIC_ZLIB   (0x03 << 4)
 419 #define VNC_TIGHT_CCB_BASIC_FILTER (0x04 << 4)
 420
 421 /*****************************************************************************
 422  *
 423  * Features
 424  *
 425  *****************************************************************************/
 426
 427 #define VNC_FEATURE_RESIZE                   0
 428 #define VNC_FEATURE_HEXTILE                  1
 429 #define VNC_FEATURE_POINTER_TYPE_CHANGE      2
 430 #define VNC_FEATURE_WMVI                     3
 431 #define VNC_FEATURE_TIGHT                    4
 432 #define VNC_FEATURE_ZLIB                     5
 433 #define VNC_FEATURE_COPYRECT                 6
 434 #define VNC_FEATURE_RICH_CURSOR              7
 435 #define VNC_FEATURE_TIGHT_PNG                8
 436 #define VNC_FEATURE_ZRLE                     9
 437 #define VNC_FEATURE_ZYWRLE                  10
 438 #define VNC_FEATURE_LED_STATE               11
 439
 440 #define VNC_FEATURE_RESIZE_MASK              (1 << VNC_FEATURE_RESIZE)
 441 #define VNC_FEATURE_HEXTILE_MASK             (1 << VNC_FEATURE_HEXTILE)
 442 #define VNC_FEATURE_POINTER_TYPE_CHANGE_MASK (1 << VNC_FEATURE_POINTER_TYPE_CHANGE)
 443 #define VNC_FEATURE_WMVI_MASK                (1 << VNC_FEATURE_WMVI)
 444 #define VNC_FEATURE_TIGHT_MASK               (1 << VNC_FEATURE_TIGHT)
 445 #define VNC_FEATURE_ZLIB_MASK                (1 << VNC_FEATURE_ZLIB)
 446 #define VNC_FEATURE_COPYRECT_MASK            (1 << VNC_FEATURE_COPYRECT)
 447 #define VNC_FEATURE_RICH_CURSOR_MASK         (1 << VNC_FEATURE_RICH_CURSOR)
 448 #define VNC_FEATURE_TIGHT_PNG_MASK           (1 << VNC_FEATURE_TIGHT_PNG)
 449 #define VNC_FEATURE_ZRLE_MASK                (1 << VNC_FEATURE_ZRLE)
 450 #define VNC_FEATURE_ZYWRLE_MASK              (1 << VNC_FEATURE_ZYWRLE)
 451 #define VNC_FEATURE_LED_STATE_MASK           (1 << VNC_FEATURE_LED_STATE)
 452
 453
 454 /* Client -> Server message IDs */
 455 #define VNC_MSG_CLIENT_SET_PIXEL_FORMAT           0
 456 #define VNC_MSG_CLIENT_SET_ENCODINGS              2
 457 #define VNC_MSG_CLIENT_FRAMEBUFFER_UPDATE_REQUEST 3
 458 #define VNC_MSG_CLIENT_KEY_EVENT                  4
 459 #define VNC_MSG_CLIENT_POINTER_EVENT              5
 460 #define VNC_MSG_CLIENT_CUT_TEXT                   6
 461 #define VNC_MSG_CLIENT_VMWARE_0                   127
 462 #define VNC_MSG_CLIENT_CALL_CONTROL               249
 463 #define VNC_MSG_CLIENT_XVP                        250
 464 #define VNC_MSG_CLIENT_SET_DESKTOP_SIZE           251
 465 #define VNC_MSG_CLIENT_TIGHT                      252
 466 #define VNC_MSG_CLIENT_GII                        253
 467 #define VNC_MSG_CLIENT_VMWARE_1                   254
 468 #define VNC_MSG_CLIENT_QEMU                       255
 469
 470 /* Server -> Client message IDs */
 471 #define VNC_MSG_SERVER_FRAMEBUFFER_UPDATE         0
 472 #define VNC_MSG_SERVER_SET_COLOUR_MAP_ENTRIES     1
 473 #define VNC_MSG_SERVER_BELL                       2
 474 #define VNC_MSG_SERVER_CUT_TEXT                   3
 475 #define VNC_MSG_SERVER_VMWARE_0                   127
 476 #define VNC_MSG_SERVER_CALL_CONTROL               249
 477 #define VNC_MSG_SERVER_XVP                        250
 478 #define VNC_MSG_SERVER_TIGHT                      252
 479 #define VNC_MSG_SERVER_GII                        253
 480 #define VNC_MSG_SERVER_VMWARE_1                   254
 481 #define VNC_MSG_SERVER_QEMU                       255
 482
 483
 484
 485 /* QEMU client -> server message IDs */
 486 #define VNC_MSG_CLIENT_QEMU_EXT_KEY_EVENT         0
 487 #define VNC_MSG_CLIENT_QEMU_AUDIO                 1
 488
 489 /* QEMU server -> client message IDs */
 490 #define VNC_MSG_SERVER_QEMU_AUDIO                 1
 491
 492
 493
 494 /* QEMU client -> server audio message IDs */
 495 #define VNC_MSG_CLIENT_QEMU_AUDIO_ENABLE          0
 496 #define VNC_MSG_CLIENT_QEMU_AUDIO_DISABLE         1
 497 #define VNC_MSG_CLIENT_QEMU_AUDIO_SET_FORMAT      2
 498
 499 /* QEMU server -> client audio message IDs */
 500 #define VNC_MSG_SERVER_QEMU_AUDIO_END             0
 501 #define VNC_MSG_SERVER_QEMU_AUDIO_BEGIN           1
 502 #define VNC_MSG_SERVER_QEMU_AUDIO_DATA            2
 503
 504
 505 /*****************************************************************************
 506  *
 507  * Internal APIs
 508  *
 509  *****************************************************************************/
 510
 511 /* Event loop functions */
 512 void vnc_client_read(void *opaque);
 513 void vnc_client_write(void *opaque);
 514
 515 long vnc_client_read_buf(VncState *vs, uint8_t *data, size_t datalen);
 516 long vnc_client_write_buf(VncState *vs, const uint8_t *data, size_t datalen);
 517
 518 /* Protocol I/O functions */
 519 void vnc_write(VncState *vs, const void *data, size_t len);
 520 void vnc_write_u32(VncState *vs, uint32_t value);
 521 void vnc_write_s32(VncState *vs, int32_t value);
 522 void vnc_write_u16(VncState *vs, uint16_t value);
 523 void vnc_write_u8(VncState *vs, uint8_t value);
 524 void vnc_flush(VncState *vs);
 525 void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting);
 526 void vnc_disconnect_finish(VncState *vs);
 527 void vnc_init_state(VncState *vs);
 528
 529
 530 /* Buffer I/O functions */
 531 uint32_t read_u32(uint8_t *data, size_t offset);
 532
 533 /* Protocol stage functions */
 534 void vnc_client_error(VncState *vs);
 535 int vnc_client_io_error(VncState *vs, int ret, int last_errno);
 536
 537 void start_client_init(VncState *vs);
 538 void start_auth_vnc(VncState *vs);
 539
 540 /* Buffer management */
 541 void buffer_reserve(Buffer *buffer, size_t len);
 542 void buffer_reset(Buffer *buffer);
 543 void buffer_free(Buffer *buffer);
 544 void buffer_append(Buffer *buffer, const void *data, size_t len);
 545 void buffer_advance(Buffer *buf, size_t len);
 546 uint8_t *buffer_end(Buffer *buffer);
 547
 548
 549 /* Misc helpers */
 550
 551 char *vnc_socket_local_addr(const char *format, int fd);
 552 char *vnc_socket_remote_addr(const char *format, int fd);
 553
 554 static inline uint32_t vnc_has_feature(VncState *vs, int feature) {
 555     return (vs->features & (1 << feature));
 556 }
 557
 558 /* Framebuffer */
 559 void vnc_framebuffer_update(VncState *vs, int x, int y, int w, int h,
 560                             int32_t encoding);
 561
 562 /* server fb is in PIXMAN_x8r8g8b8 */
 563 #define VNC_SERVER_FB_FORMAT PIXMAN_FORMAT(32, PIXMAN_TYPE_ARGB, 0, 8, 8, 8)
 564 #define VNC_SERVER_FB_BITS   (PIXMAN_FORMAT_BPP(VNC_SERVER_FB_FORMAT))
 565 #define VNC_SERVER_FB_BYTES  ((VNC_SERVER_FB_BITS+7)/8)
 566
 567 void *vnc_server_fb_ptr(VncDisplay *vd, int x, int y);
 568 int vnc_server_fb_stride(VncDisplay *vd);
 569
 570 void vnc_convert_pixel(VncState *vs, uint8_t *buf, uint32_t v);
 571 double vnc_update_freq(VncState *vs, int x, int y, int w, int h);
 572 void vnc_sent_lossy_rect(VncState *vs, int x, int y, int w, int h);
 573
 574 /* Encodings */
 575 int vnc_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 576
 577 int vnc_raw_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 578
 579 int vnc_hextile_send_framebuffer_update(VncState *vs, int x,
 580                                          int y, int w, int h);
 581 void vnc_hextile_set_pixel_conversion(VncState *vs, int generic);
 582
 583 void *vnc_zlib_zalloc(void *x, unsigned items, unsigned size);
 584 void vnc_zlib_zfree(void *x, void *addr);
 585 int vnc_zlib_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 586 void vnc_zlib_clear(VncState *vs);
 587
 588 int vnc_tight_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 589 int vnc_tight_png_send_framebuffer_update(VncState *vs, int x, int y,
 590                                           int w, int h);
 591 void vnc_tight_clear(VncState *vs);
 592
 593 int vnc_zrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 594 int vnc_zywrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 595 void vnc_zrle_clear(VncState *vs);
 596
 597 #endif /* __QEMU_VNC_H */