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 <zlib.h>
  37 #include <stdbool.h>
  38
  39 #include "keymaps.h"
  40 #include "vnc-palette.h"
  41 #include "vnc-enc-zrle.h"
  42 #include "qapi-types.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_DIRTY_PIXELS_PER_BIT is the number of dirty pixels represented
  81  * by one bit in the dirty bitmap, should be a power of 2 */
  82 #define VNC_DIRTY_PIXELS_PER_BIT 16
  83
  84 /* VNC_MAX_WIDTH must be a multiple of VNC_DIRTY_PIXELS_PER_BIT. */
  85
  86 #define VNC_MAX_WIDTH ROUND_UP(2560, VNC_DIRTY_PIXELS_PER_BIT)
  87 #define VNC_MAX_HEIGHT 2048
  88
  89 /* VNC_DIRTY_BITS is the number of bits in the dirty bitmap. */
  90 #define VNC_DIRTY_BITS (VNC_MAX_WIDTH / VNC_DIRTY_PIXELS_PER_BIT)
  91
  92 /* VNC_DIRTY_BPL (BPL = bits per line) might be greater than
  93  * VNC_DIRTY_BITS due to alignment */
  94 #define VNC_DIRTY_BPL(x) (sizeof((x)->dirty) / VNC_MAX_HEIGHT * BITS_PER_BYTE)
  95
  96 #define VNC_STAT_RECT  64
  97 #define VNC_STAT_COLS (VNC_MAX_WIDTH / VNC_STAT_RECT)
  98 #define VNC_STAT_ROWS (VNC_MAX_HEIGHT / VNC_STAT_RECT)
  99
 100 #define VNC_AUTH_CHALLENGE_SIZE 16
 101
 102 typedef struct VncDisplay VncDisplay;
 103
 104 #ifdef CONFIG_VNC_TLS
 105 #include "vnc-tls.h"
 106 #include "vnc-auth-vencrypt.h"
 107 #endif
 108 #ifdef CONFIG_VNC_SASL
 109 #include "vnc-auth-sasl.h"
 110 #endif
 111 #include "vnc-ws.h"
 112
 113 struct VncRectStat
 114 {
 115     /* time of last 10 updates, to find update frequency */
 116     struct timeval times[10];
 117     int idx;
 118
 119     double freq;        /* Update frequency (in Hz) */
 120     bool updated;       /* Already updated during this refresh */
 121 };
 122
 123 typedef struct VncRectStat VncRectStat;
 124
 125 struct VncSurface
 126 {
 127     struct timeval last_freq_check;
 128     DECLARE_BITMAP(dirty[VNC_MAX_HEIGHT],
 129                    VNC_MAX_WIDTH / VNC_DIRTY_PIXELS_PER_BIT);
 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_connecting;
 152     int num_shared;
 153     int num_exclusive;
 154     int connections_limit;
 155     VncSharePolicy share_policy;
 156     int lsock;
 157     int lwebsock;
 158     bool ws_enabled;
 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     const char *id;
 173     QTAILQ_ENTRY(VncDisplay) next;
 174     bool enabled;
 175     bool is_unix;
 176     char *password;
 177     time_t expires;
 178     int auth;
 179     int subauth; /* Used by VeNCrypt */
 180     int ws_auth; /* Used by websockets */
 181     bool ws_tls; /* Used by websockets */
 182     bool lossy;
 183     bool non_adaptive;
 184 #ifdef CONFIG_VNC_TLS
 185     VncDisplayTLS tls;
 186 #endif
 187 #ifdef CONFIG_VNC_SASL
 188     VncDisplaySASL sasl;
 189 #endif
 190 };
 191
 192 typedef struct VncTight {
 193     int type;
 194     uint8_t quality;
 195     uint8_t compression;
 196     uint8_t pixel24;
 197     Buffer tight;
 198     Buffer tmp;
 199     Buffer zlib;
 200     Buffer gradient;
 201 #ifdef CONFIG_VNC_JPEG
 202     Buffer jpeg;
 203 #endif
 204 #ifdef CONFIG_VNC_PNG
 205     Buffer png;
 206 #endif
 207     int levels[4];
 208     z_stream stream[4];
 209 } VncTight;
 210
 211 typedef struct VncHextile {
 212     VncSendHextileTile *send_tile;
 213 } VncHextile;
 214
 215 typedef struct VncZlib {
 216     Buffer zlib;
 217     Buffer tmp;
 218     z_stream stream;
 219     int level;
 220 } VncZlib;
 221
 222 typedef struct VncZrle {
 223     int type;
 224     Buffer fb;
 225     Buffer zrle;
 226     Buffer tmp;
 227     Buffer zlib;
 228     z_stream stream;
 229     VncPalette palette;
 230 } VncZrle;
 231
 232 typedef struct VncZywrle {
 233     int buf[VNC_ZRLE_TILE_WIDTH * VNC_ZRLE_TILE_HEIGHT];
 234 } VncZywrle;
 235
 236 struct VncRect
 237 {
 238     int x;
 239     int y;
 240     int w;
 241     int h;
 242 };
 243
 244 struct VncRectEntry
 245 {
 246     struct VncRect rect;
 247     QLIST_ENTRY(VncRectEntry) next;
 248 };
 249
 250 struct VncJob
 251 {
 252     VncState *vs;
 253
 254     QLIST_HEAD(, VncRectEntry) rectangles;
 255     QTAILQ_ENTRY(VncJob) next;
 256 };
 257
 258 struct VncState
 259 {
 260     int csock;
 261
 262     DECLARE_BITMAP(dirty[VNC_MAX_HEIGHT], VNC_DIRTY_BITS);
 263     uint8_t **lossy_rect; /* Not an Array to avoid costly memcpy in
 264                            * vnc-jobs-async.c */
 265
 266     VncDisplay *vd;
 267     int need_update;
 268     int force_update;
 269     int has_dirty;
 270     uint32_t features;
 271     int absolute;
 272     int last_x;
 273     int last_y;
 274     uint32_t last_bmask;
 275     int client_width;
 276     int client_height;
 277     VncShareMode share_mode;
 278
 279     uint32_t vnc_encoding;
 280
 281     int major;
 282     int minor;
 283
 284     int auth;
 285     int subauth; /* Used by VeNCrypt */
 286     char challenge[VNC_AUTH_CHALLENGE_SIZE];
 287 #ifdef CONFIG_VNC_TLS
 288     VncStateTLS tls;
 289 #endif
 290 #ifdef CONFIG_VNC_SASL
 291     VncStateSASL sasl;
 292 #endif
 293     bool encode_ws;
 294     bool websocket;
 295
 296     VncClientInfo *info;
 297
 298     Buffer output;
 299     Buffer input;
 300     Buffer ws_input;
 301     Buffer ws_output;
 302     size_t ws_payload_remain;
 303     WsMask ws_payload_mask;
 304     /* current output mode information */
 305     VncWritePixels *write_pixels;
 306     PixelFormat client_pf;
 307     pixman_format_code_t client_format;
 308     bool client_be;
 309
 310     CaptureVoiceOut *audio_cap;
 311     struct audsettings as;
 312
 313     VncReadEvent *read_handler;
 314     size_t read_handler_expect;
 315     /* input */
 316     uint8_t modifiers_state[256];
 317     QEMUPutLEDEntry *led;
 318
 319     bool abort;
 320     bool initialized;
 321     QemuMutex output_mutex;
 322     QEMUBH *bh;
 323     Buffer jobs_buffer;
 324
 325     /* Encoding specific, if you add something here, don't forget to
 326      *  update vnc_async_encoding_start()
 327      */
 328     VncTight tight;
 329     VncZlib zlib;
 330     VncHextile hextile;
 331     VncZrle zrle;
 332     VncZywrle zywrle;
 333
 334     Notifier mouse_mode_notifier;
 335
 336     QTAILQ_ENTRY(VncState) next;
 337 };
 338
 339
 340 /*****************************************************************************
 341  *
 342  * Authentication modes
 343  *
 344  *****************************************************************************/
 345
 346 enum {
 347     VNC_AUTH_INVALID = 0,
 348     VNC_AUTH_NONE = 1,
 349     VNC_AUTH_VNC = 2,
 350     VNC_AUTH_RA2 = 5,
 351     VNC_AUTH_RA2NE = 6,
 352     VNC_AUTH_TIGHT = 16,
 353     VNC_AUTH_ULTRA = 17,
 354     VNC_AUTH_TLS = 18,      /* Supported in GTK-VNC & VINO */
 355     VNC_AUTH_VENCRYPT = 19, /* Supported in GTK-VNC & VeNCrypt */
 356     VNC_AUTH_SASL = 20,     /* Supported in GTK-VNC & VINO */
 357 };
 358
 359 enum {
 360     VNC_AUTH_VENCRYPT_PLAIN = 256,
 361     VNC_AUTH_VENCRYPT_TLSNONE = 257,
 362     VNC_AUTH_VENCRYPT_TLSVNC = 258,
 363     VNC_AUTH_VENCRYPT_TLSPLAIN = 259,
 364     VNC_AUTH_VENCRYPT_X509NONE = 260,
 365     VNC_AUTH_VENCRYPT_X509VNC = 261,
 366     VNC_AUTH_VENCRYPT_X509PLAIN = 262,
 367     VNC_AUTH_VENCRYPT_X509SASL = 263,
 368     VNC_AUTH_VENCRYPT_TLSSASL = 264,
 369 };
 370
 371
 372 /*****************************************************************************
 373  *
 374  * Encoding types
 375  *
 376  *****************************************************************************/
 377
 378 #define VNC_ENCODING_RAW                  0x00000000
 379 #define VNC_ENCODING_COPYRECT             0x00000001
 380 #define VNC_ENCODING_RRE                  0x00000002
 381 #define VNC_ENCODING_CORRE                0x00000004
 382 #define VNC_ENCODING_HEXTILE              0x00000005
 383 #define VNC_ENCODING_ZLIB                 0x00000006
 384 #define VNC_ENCODING_TIGHT                0x00000007
 385 #define VNC_ENCODING_ZLIBHEX              0x00000008
 386 #define VNC_ENCODING_TRLE                 0x0000000f
 387 #define VNC_ENCODING_ZRLE                 0x00000010
 388 #define VNC_ENCODING_ZYWRLE               0x00000011
 389 #define VNC_ENCODING_COMPRESSLEVEL0       0xFFFFFF00 /* -256 */
 390 #define VNC_ENCODING_QUALITYLEVEL0        0xFFFFFFE0 /* -32  */
 391 #define VNC_ENCODING_XCURSOR              0xFFFFFF10 /* -240 */
 392 #define VNC_ENCODING_RICH_CURSOR          0xFFFFFF11 /* -239 */
 393 #define VNC_ENCODING_POINTER_POS          0xFFFFFF18 /* -232 */
 394 #define VNC_ENCODING_LASTRECT             0xFFFFFF20 /* -224 */
 395 #define VNC_ENCODING_DESKTOPRESIZE        0xFFFFFF21 /* -223 */
 396 #define VNC_ENCODING_POINTER_TYPE_CHANGE  0XFFFFFEFF /* -257 */
 397 #define VNC_ENCODING_EXT_KEY_EVENT        0XFFFFFEFE /* -258 */
 398 #define VNC_ENCODING_AUDIO                0XFFFFFEFD /* -259 */
 399 #define VNC_ENCODING_TIGHT_PNG            0xFFFFFEFC /* -260 */
 400 #define VNC_ENCODING_LED_STATE            0XFFFFFEFB /* -261 */
 401 #define VNC_ENCODING_WMVi                 0x574D5669
 402
 403 /*****************************************************************************
 404  *
 405  * Other tight constants
 406  *
 407  *****************************************************************************/
 408
 409 /*
 410  * Vendors known by TightVNC: standard VNC/RealVNC, TridiaVNC, and TightVNC.
 411  */
 412
 413 #define VNC_TIGHT_CCB_RESET_MASK   (0x0f)
 414 #define VNC_TIGHT_CCB_TYPE_MASK    (0x0f << 4)
 415 #define VNC_TIGHT_CCB_TYPE_FILL    (0x08 << 4)
 416 #define VNC_TIGHT_CCB_TYPE_JPEG    (0x09 << 4)
 417 #define VNC_TIGHT_CCB_TYPE_PNG     (0x0A << 4)
 418 #define VNC_TIGHT_CCB_BASIC_MAX    (0x07 << 4)
 419 #define VNC_TIGHT_CCB_BASIC_ZLIB   (0x03 << 4)
 420 #define VNC_TIGHT_CCB_BASIC_FILTER (0x04 << 4)
 421
 422 /*****************************************************************************
 423  *
 424  * Features
 425  *
 426  *****************************************************************************/
 427
 428 #define VNC_FEATURE_RESIZE                   0
 429 #define VNC_FEATURE_HEXTILE                  1
 430 #define VNC_FEATURE_POINTER_TYPE_CHANGE      2
 431 #define VNC_FEATURE_WMVI                     3
 432 #define VNC_FEATURE_TIGHT                    4
 433 #define VNC_FEATURE_ZLIB                     5
 434 #define VNC_FEATURE_COPYRECT                 6
 435 #define VNC_FEATURE_RICH_CURSOR              7
 436 #define VNC_FEATURE_TIGHT_PNG                8
 437 #define VNC_FEATURE_ZRLE                     9
 438 #define VNC_FEATURE_ZYWRLE                  10
 439 #define VNC_FEATURE_LED_STATE               11
 440
 441 #define VNC_FEATURE_RESIZE_MASK              (1 << VNC_FEATURE_RESIZE)
 442 #define VNC_FEATURE_HEXTILE_MASK             (1 << VNC_FEATURE_HEXTILE)
 443 #define VNC_FEATURE_POINTER_TYPE_CHANGE_MASK (1 << VNC_FEATURE_POINTER_TYPE_CHANGE)
 444 #define VNC_FEATURE_WMVI_MASK                (1 << VNC_FEATURE_WMVI)
 445 #define VNC_FEATURE_TIGHT_MASK               (1 << VNC_FEATURE_TIGHT)
 446 #define VNC_FEATURE_ZLIB_MASK                (1 << VNC_FEATURE_ZLIB)
 447 #define VNC_FEATURE_COPYRECT_MASK            (1 << VNC_FEATURE_COPYRECT)
 448 #define VNC_FEATURE_RICH_CURSOR_MASK         (1 << VNC_FEATURE_RICH_CURSOR)
 449 #define VNC_FEATURE_TIGHT_PNG_MASK           (1 << VNC_FEATURE_TIGHT_PNG)
 450 #define VNC_FEATURE_ZRLE_MASK                (1 << VNC_FEATURE_ZRLE)
 451 #define VNC_FEATURE_ZYWRLE_MASK              (1 << VNC_FEATURE_ZYWRLE)
 452 #define VNC_FEATURE_LED_STATE_MASK           (1 << VNC_FEATURE_LED_STATE)
 453
 454
 455 /* Client -> Server message IDs */
 456 #define VNC_MSG_CLIENT_SET_PIXEL_FORMAT           0
 457 #define VNC_MSG_CLIENT_SET_ENCODINGS              2
 458 #define VNC_MSG_CLIENT_FRAMEBUFFER_UPDATE_REQUEST 3
 459 #define VNC_MSG_CLIENT_KEY_EVENT                  4
 460 #define VNC_MSG_CLIENT_POINTER_EVENT              5
 461 #define VNC_MSG_CLIENT_CUT_TEXT                   6
 462 #define VNC_MSG_CLIENT_VMWARE_0                   127
 463 #define VNC_MSG_CLIENT_CALL_CONTROL               249
 464 #define VNC_MSG_CLIENT_XVP                        250
 465 #define VNC_MSG_CLIENT_SET_DESKTOP_SIZE           251
 466 #define VNC_MSG_CLIENT_TIGHT                      252
 467 #define VNC_MSG_CLIENT_GII                        253
 468 #define VNC_MSG_CLIENT_VMWARE_1                   254
 469 #define VNC_MSG_CLIENT_QEMU                       255
 470
 471 /* Server -> Client message IDs */
 472 #define VNC_MSG_SERVER_FRAMEBUFFER_UPDATE         0
 473 #define VNC_MSG_SERVER_SET_COLOUR_MAP_ENTRIES     1
 474 #define VNC_MSG_SERVER_BELL                       2
 475 #define VNC_MSG_SERVER_CUT_TEXT                   3
 476 #define VNC_MSG_SERVER_VMWARE_0                   127
 477 #define VNC_MSG_SERVER_CALL_CONTROL               249
 478 #define VNC_MSG_SERVER_XVP                        250
 479 #define VNC_MSG_SERVER_TIGHT                      252
 480 #define VNC_MSG_SERVER_GII                        253
 481 #define VNC_MSG_SERVER_VMWARE_1                   254
 482 #define VNC_MSG_SERVER_QEMU                       255
 483
 484
 485
 486 /* QEMU client -> server message IDs */
 487 #define VNC_MSG_CLIENT_QEMU_EXT_KEY_EVENT         0
 488 #define VNC_MSG_CLIENT_QEMU_AUDIO                 1
 489
 490 /* QEMU server -> client message IDs */
 491 #define VNC_MSG_SERVER_QEMU_AUDIO                 1
 492
 493
 494
 495 /* QEMU client -> server audio message IDs */
 496 #define VNC_MSG_CLIENT_QEMU_AUDIO_ENABLE          0
 497 #define VNC_MSG_CLIENT_QEMU_AUDIO_DISABLE         1
 498 #define VNC_MSG_CLIENT_QEMU_AUDIO_SET_FORMAT      2
 499
 500 /* QEMU server -> client audio message IDs */
 501 #define VNC_MSG_SERVER_QEMU_AUDIO_END             0
 502 #define VNC_MSG_SERVER_QEMU_AUDIO_BEGIN           1
 503 #define VNC_MSG_SERVER_QEMU_AUDIO_DATA            2
 504
 505
 506 /*****************************************************************************
 507  *
 508  * Internal APIs
 509  *
 510  *****************************************************************************/
 511
 512 /* Event loop functions */
 513 void vnc_client_read(void *opaque);
 514 void vnc_client_write(void *opaque);
 515
 516 long vnc_client_read_buf(VncState *vs, uint8_t *data, size_t datalen);
 517 long vnc_client_write_buf(VncState *vs, const uint8_t *data, size_t datalen);
 518
 519 /* Protocol I/O functions */
 520 void vnc_write(VncState *vs, const void *data, size_t len);
 521 void vnc_write_u32(VncState *vs, uint32_t value);
 522 void vnc_write_s32(VncState *vs, int32_t value);
 523 void vnc_write_u16(VncState *vs, uint16_t value);
 524 void vnc_write_u8(VncState *vs, uint8_t value);
 525 void vnc_flush(VncState *vs);
 526 void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting);
 527 void vnc_disconnect_finish(VncState *vs);
 528 void vnc_init_state(VncState *vs);
 529
 530
 531 /* Buffer I/O functions */
 532 uint32_t read_u32(uint8_t *data, size_t offset);
 533
 534 /* Protocol stage functions */
 535 void vnc_client_error(VncState *vs);
 536 int vnc_client_io_error(VncState *vs, int ret, int last_errno);
 537
 538 void start_client_init(VncState *vs);
 539 void start_auth_vnc(VncState *vs);
 540
 541 /* Buffer management */
 542 void buffer_reserve(Buffer *buffer, size_t len);
 543 void buffer_reset(Buffer *buffer);
 544 void buffer_free(Buffer *buffer);
 545 void buffer_append(Buffer *buffer, const void *data, size_t len);
 546 void buffer_advance(Buffer *buf, size_t len);
 547 uint8_t *buffer_end(Buffer *buffer);
 548
 549
 550 /* Misc helpers */
 551
 552 char *vnc_socket_local_addr(const char *format, int fd);
 553 char *vnc_socket_remote_addr(const char *format, int fd);
 554
 555 static inline uint32_t vnc_has_feature(VncState *vs, int feature) {
 556     return (vs->features & (1 << feature));
 557 }
 558
 559 /* Framebuffer */
 560 void vnc_framebuffer_update(VncState *vs, int x, int y, int w, int h,
 561                             int32_t encoding);
 562
 563 /* server fb is in PIXMAN_x8r8g8b8 */
 564 #define VNC_SERVER_FB_FORMAT PIXMAN_FORMAT(32, PIXMAN_TYPE_ARGB, 0, 8, 8, 8)
 565 #define VNC_SERVER_FB_BITS   (PIXMAN_FORMAT_BPP(VNC_SERVER_FB_FORMAT))
 566 #define VNC_SERVER_FB_BYTES  ((VNC_SERVER_FB_BITS+7)/8)
 567
 568 void *vnc_server_fb_ptr(VncDisplay *vd, int x, int y);
 569 int vnc_server_fb_stride(VncDisplay *vd);
 570
 571 void vnc_convert_pixel(VncState *vs, uint8_t *buf, uint32_t v);
 572 double vnc_update_freq(VncState *vs, int x, int y, int w, int h);
 573 void vnc_sent_lossy_rect(VncState *vs, int x, int y, int w, int h);
 574
 575 /* Encodings */
 576 int vnc_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 577
 578 int vnc_raw_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 579
 580 int vnc_hextile_send_framebuffer_update(VncState *vs, int x,
 581                                          int y, int w, int h);
 582 void vnc_hextile_set_pixel_conversion(VncState *vs, int generic);
 583
 584 void *vnc_zlib_zalloc(void *x, unsigned items, unsigned size);
 585 void vnc_zlib_zfree(void *x, void *addr);
 586 int vnc_zlib_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 587 void vnc_zlib_clear(VncState *vs);
 588
 589 int vnc_tight_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 590 int vnc_tight_png_send_framebuffer_update(VncState *vs, int x, int y,
 591                                           int w, int h);
 592 void vnc_tight_clear(VncState *vs);
 593
 594 int vnc_zrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 595 int vnc_zywrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
 596 void vnc_zrle_clear(VncState *vs);
 597
 598 #endif /* __QEMU_VNC_H */