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 #ifdef CONFIG_VNC_WS 112 #include "vnc-ws.h" 113 #endif 114 115 struct VncRectStat 116 { 117 /* time of last 10 updates, to find update frequency */ 118 struct timeval times[10]; 119 int idx; 120 121 double freq; /* Update frequency (in Hz) */ 122 bool updated; /* Already updated during this refresh */ 123 }; 124 125 typedef struct VncRectStat VncRectStat; 126 127 struct VncSurface 128 { 129 struct timeval last_freq_check; 130 DECLARE_BITMAP(dirty[VNC_MAX_HEIGHT], 131 VNC_MAX_WIDTH / VNC_DIRTY_PIXELS_PER_BIT); 132 VncRectStat stats[VNC_STAT_ROWS][VNC_STAT_COLS]; 133 pixman_image_t *fb; 134 pixman_format_code_t format; 135 }; 136 137 typedef enum VncShareMode { 138 VNC_SHARE_MODE_CONNECTING = 1, 139 VNC_SHARE_MODE_SHARED, 140 VNC_SHARE_MODE_EXCLUSIVE, 141 VNC_SHARE_MODE_DISCONNECTED, 142 } VncShareMode; 143 144 typedef enum VncSharePolicy { 145 VNC_SHARE_POLICY_IGNORE = 1, 146 VNC_SHARE_POLICY_ALLOW_EXCLUSIVE, 147 VNC_SHARE_POLICY_FORCE_SHARED, 148 } VncSharePolicy; 149 150 struct VncDisplay 151 { 152 QTAILQ_HEAD(, VncState) clients; 153 int num_connecting; 154 int num_shared; 155 int num_exclusive; 156 int connections_limit; 157 VncSharePolicy share_policy; 158 int lsock; 159 #ifdef CONFIG_VNC_WS 160 int lwebsock; 161 bool ws_enabled; 162 #endif 163 DisplaySurface *ds; 164 DisplayChangeListener dcl; 165 kbd_layout_t *kbd_layout; 166 int lock_key_sync; 167 QemuMutex mutex; 168 169 QEMUCursor *cursor; 170 int cursor_msize; 171 uint8_t *cursor_mask; 172 173 struct VncSurface guest; /* guest visible surface (aka ds->surface) */ 174 pixman_image_t *server; /* vnc server surface */ 175 176 const char *id; 177 QTAILQ_ENTRY(VncDisplay) next; 178 bool enabled; 179 bool is_unix; 180 char *password; 181 time_t expires; 182 int auth; 183 int subauth; /* Used by VeNCrypt */ 184 int ws_auth; /* Used by websockets */ 185 bool ws_tls; /* Used by websockets */ 186 bool lossy; 187 bool non_adaptive; 188 #ifdef CONFIG_VNC_TLS 189 VncDisplayTLS tls; 190 #endif 191 #ifdef CONFIG_VNC_SASL 192 VncDisplaySASL sasl; 193 #endif 194 }; 195 196 typedef struct VncTight { 197 int type; 198 uint8_t quality; 199 uint8_t compression; 200 uint8_t pixel24; 201 Buffer tight; 202 Buffer tmp; 203 Buffer zlib; 204 Buffer gradient; 205 #ifdef CONFIG_VNC_JPEG 206 Buffer jpeg; 207 #endif 208 #ifdef CONFIG_VNC_PNG 209 Buffer png; 210 #endif 211 int levels[4]; 212 z_stream stream[4]; 213 } VncTight; 214 215 typedef struct VncHextile { 216 VncSendHextileTile *send_tile; 217 } VncHextile; 218 219 typedef struct VncZlib { 220 Buffer zlib; 221 Buffer tmp; 222 z_stream stream; 223 int level; 224 } VncZlib; 225 226 typedef struct VncZrle { 227 int type; 228 Buffer fb; 229 Buffer zrle; 230 Buffer tmp; 231 Buffer zlib; 232 z_stream stream; 233 VncPalette palette; 234 } VncZrle; 235 236 typedef struct VncZywrle { 237 int buf[VNC_ZRLE_TILE_WIDTH * VNC_ZRLE_TILE_HEIGHT]; 238 } VncZywrle; 239 240 struct VncRect 241 { 242 int x; 243 int y; 244 int w; 245 int h; 246 }; 247 248 struct VncRectEntry 249 { 250 struct VncRect rect; 251 QLIST_ENTRY(VncRectEntry) next; 252 }; 253 254 struct VncJob 255 { 256 VncState *vs; 257 258 QLIST_HEAD(, VncRectEntry) rectangles; 259 QTAILQ_ENTRY(VncJob) next; 260 }; 261 262 struct VncState 263 { 264 int csock; 265 266 DECLARE_BITMAP(dirty[VNC_MAX_HEIGHT], VNC_DIRTY_BITS); 267 uint8_t **lossy_rect; /* Not an Array to avoid costly memcpy in 268 * vnc-jobs-async.c */ 269 270 VncDisplay *vd; 271 int need_update; 272 int force_update; 273 int has_dirty; 274 uint32_t features; 275 int absolute; 276 int last_x; 277 int last_y; 278 uint32_t last_bmask; 279 int client_width; 280 int client_height; 281 VncShareMode share_mode; 282 283 uint32_t vnc_encoding; 284 285 int major; 286 int minor; 287 288 int auth; 289 int subauth; /* Used by VeNCrypt */ 290 char challenge[VNC_AUTH_CHALLENGE_SIZE]; 291 #ifdef CONFIG_VNC_TLS 292 VncStateTLS tls; 293 #endif 294 #ifdef CONFIG_VNC_SASL 295 VncStateSASL sasl; 296 #endif 297 #ifdef CONFIG_VNC_WS 298 bool encode_ws; 299 bool websocket; 300 #endif /* CONFIG_VNC_WS */ 301 302 VncClientInfo *info; 303 304 Buffer output; 305 Buffer input; 306 #ifdef CONFIG_VNC_WS 307 Buffer ws_input; 308 Buffer ws_output; 309 size_t ws_payload_remain; 310 WsMask ws_payload_mask; 311 #endif 312 /* current output mode information */ 313 VncWritePixels *write_pixels; 314 PixelFormat client_pf; 315 pixman_format_code_t client_format; 316 bool client_be; 317 318 CaptureVoiceOut *audio_cap; 319 struct audsettings as; 320 321 VncReadEvent *read_handler; 322 size_t read_handler_expect; 323 /* input */ 324 uint8_t modifiers_state[256]; 325 QEMUPutLEDEntry *led; 326 327 bool abort; 328 bool initialized; 329 QemuMutex output_mutex; 330 QEMUBH *bh; 331 Buffer jobs_buffer; 332 333 /* Encoding specific, if you add something here, don't forget to 334 * update vnc_async_encoding_start() 335 */ 336 VncTight tight; 337 VncZlib zlib; 338 VncHextile hextile; 339 VncZrle zrle; 340 VncZywrle zywrle; 341 342 Notifier mouse_mode_notifier; 343 344 QTAILQ_ENTRY(VncState) next; 345 }; 346 347 348 /***************************************************************************** 349 * 350 * Authentication modes 351 * 352 *****************************************************************************/ 353 354 enum { 355 VNC_AUTH_INVALID = 0, 356 VNC_AUTH_NONE = 1, 357 VNC_AUTH_VNC = 2, 358 VNC_AUTH_RA2 = 5, 359 VNC_AUTH_RA2NE = 6, 360 VNC_AUTH_TIGHT = 16, 361 VNC_AUTH_ULTRA = 17, 362 VNC_AUTH_TLS = 18, /* Supported in GTK-VNC & VINO */ 363 VNC_AUTH_VENCRYPT = 19, /* Supported in GTK-VNC & VeNCrypt */ 364 VNC_AUTH_SASL = 20, /* Supported in GTK-VNC & VINO */ 365 }; 366 367 enum { 368 VNC_AUTH_VENCRYPT_PLAIN = 256, 369 VNC_AUTH_VENCRYPT_TLSNONE = 257, 370 VNC_AUTH_VENCRYPT_TLSVNC = 258, 371 VNC_AUTH_VENCRYPT_TLSPLAIN = 259, 372 VNC_AUTH_VENCRYPT_X509NONE = 260, 373 VNC_AUTH_VENCRYPT_X509VNC = 261, 374 VNC_AUTH_VENCRYPT_X509PLAIN = 262, 375 VNC_AUTH_VENCRYPT_X509SASL = 263, 376 VNC_AUTH_VENCRYPT_TLSSASL = 264, 377 }; 378 379 380 /***************************************************************************** 381 * 382 * Encoding types 383 * 384 *****************************************************************************/ 385 386 #define VNC_ENCODING_RAW 0x00000000 387 #define VNC_ENCODING_COPYRECT 0x00000001 388 #define VNC_ENCODING_RRE 0x00000002 389 #define VNC_ENCODING_CORRE 0x00000004 390 #define VNC_ENCODING_HEXTILE 0x00000005 391 #define VNC_ENCODING_ZLIB 0x00000006 392 #define VNC_ENCODING_TIGHT 0x00000007 393 #define VNC_ENCODING_ZLIBHEX 0x00000008 394 #define VNC_ENCODING_TRLE 0x0000000f 395 #define VNC_ENCODING_ZRLE 0x00000010 396 #define VNC_ENCODING_ZYWRLE 0x00000011 397 #define VNC_ENCODING_COMPRESSLEVEL0 0xFFFFFF00 /* -256 */ 398 #define VNC_ENCODING_QUALITYLEVEL0 0xFFFFFFE0 /* -32 */ 399 #define VNC_ENCODING_XCURSOR 0xFFFFFF10 /* -240 */ 400 #define VNC_ENCODING_RICH_CURSOR 0xFFFFFF11 /* -239 */ 401 #define VNC_ENCODING_POINTER_POS 0xFFFFFF18 /* -232 */ 402 #define VNC_ENCODING_LASTRECT 0xFFFFFF20 /* -224 */ 403 #define VNC_ENCODING_DESKTOPRESIZE 0xFFFFFF21 /* -223 */ 404 #define VNC_ENCODING_POINTER_TYPE_CHANGE 0XFFFFFEFF /* -257 */ 405 #define VNC_ENCODING_EXT_KEY_EVENT 0XFFFFFEFE /* -258 */ 406 #define VNC_ENCODING_AUDIO 0XFFFFFEFD /* -259 */ 407 #define VNC_ENCODING_TIGHT_PNG 0xFFFFFEFC /* -260 */ 408 #define VNC_ENCODING_LED_STATE 0XFFFFFEFB /* -261 */ 409 #define VNC_ENCODING_WMVi 0x574D5669 410 411 /***************************************************************************** 412 * 413 * Other tight constants 414 * 415 *****************************************************************************/ 416 417 /* 418 * Vendors known by TightVNC: standard VNC/RealVNC, TridiaVNC, and TightVNC. 419 */ 420 421 #define VNC_TIGHT_CCB_RESET_MASK (0x0f) 422 #define VNC_TIGHT_CCB_TYPE_MASK (0x0f << 4) 423 #define VNC_TIGHT_CCB_TYPE_FILL (0x08 << 4) 424 #define VNC_TIGHT_CCB_TYPE_JPEG (0x09 << 4) 425 #define VNC_TIGHT_CCB_TYPE_PNG (0x0A << 4) 426 #define VNC_TIGHT_CCB_BASIC_MAX (0x07 << 4) 427 #define VNC_TIGHT_CCB_BASIC_ZLIB (0x03 << 4) 428 #define VNC_TIGHT_CCB_BASIC_FILTER (0x04 << 4) 429 430 /***************************************************************************** 431 * 432 * Features 433 * 434 *****************************************************************************/ 435 436 #define VNC_FEATURE_RESIZE 0 437 #define VNC_FEATURE_HEXTILE 1 438 #define VNC_FEATURE_POINTER_TYPE_CHANGE 2 439 #define VNC_FEATURE_WMVI 3 440 #define VNC_FEATURE_TIGHT 4 441 #define VNC_FEATURE_ZLIB 5 442 #define VNC_FEATURE_COPYRECT 6 443 #define VNC_FEATURE_RICH_CURSOR 7 444 #define VNC_FEATURE_TIGHT_PNG 8 445 #define VNC_FEATURE_ZRLE 9 446 #define VNC_FEATURE_ZYWRLE 10 447 #define VNC_FEATURE_LED_STATE 11 448 449 #define VNC_FEATURE_RESIZE_MASK (1 << VNC_FEATURE_RESIZE) 450 #define VNC_FEATURE_HEXTILE_MASK (1 << VNC_FEATURE_HEXTILE) 451 #define VNC_FEATURE_POINTER_TYPE_CHANGE_MASK (1 << VNC_FEATURE_POINTER_TYPE_CHANGE) 452 #define VNC_FEATURE_WMVI_MASK (1 << VNC_FEATURE_WMVI) 453 #define VNC_FEATURE_TIGHT_MASK (1 << VNC_FEATURE_TIGHT) 454 #define VNC_FEATURE_ZLIB_MASK (1 << VNC_FEATURE_ZLIB) 455 #define VNC_FEATURE_COPYRECT_MASK (1 << VNC_FEATURE_COPYRECT) 456 #define VNC_FEATURE_RICH_CURSOR_MASK (1 << VNC_FEATURE_RICH_CURSOR) 457 #define VNC_FEATURE_TIGHT_PNG_MASK (1 << VNC_FEATURE_TIGHT_PNG) 458 #define VNC_FEATURE_ZRLE_MASK (1 << VNC_FEATURE_ZRLE) 459 #define VNC_FEATURE_ZYWRLE_MASK (1 << VNC_FEATURE_ZYWRLE) 460 #define VNC_FEATURE_LED_STATE_MASK (1 << VNC_FEATURE_LED_STATE) 461 462 463 /* Client -> Server message IDs */ 464 #define VNC_MSG_CLIENT_SET_PIXEL_FORMAT 0 465 #define VNC_MSG_CLIENT_SET_ENCODINGS 2 466 #define VNC_MSG_CLIENT_FRAMEBUFFER_UPDATE_REQUEST 3 467 #define VNC_MSG_CLIENT_KEY_EVENT 4 468 #define VNC_MSG_CLIENT_POINTER_EVENT 5 469 #define VNC_MSG_CLIENT_CUT_TEXT 6 470 #define VNC_MSG_CLIENT_VMWARE_0 127 471 #define VNC_MSG_CLIENT_CALL_CONTROL 249 472 #define VNC_MSG_CLIENT_XVP 250 473 #define VNC_MSG_CLIENT_SET_DESKTOP_SIZE 251 474 #define VNC_MSG_CLIENT_TIGHT 252 475 #define VNC_MSG_CLIENT_GII 253 476 #define VNC_MSG_CLIENT_VMWARE_1 254 477 #define VNC_MSG_CLIENT_QEMU 255 478 479 /* Server -> Client message IDs */ 480 #define VNC_MSG_SERVER_FRAMEBUFFER_UPDATE 0 481 #define VNC_MSG_SERVER_SET_COLOUR_MAP_ENTRIES 1 482 #define VNC_MSG_SERVER_BELL 2 483 #define VNC_MSG_SERVER_CUT_TEXT 3 484 #define VNC_MSG_SERVER_VMWARE_0 127 485 #define VNC_MSG_SERVER_CALL_CONTROL 249 486 #define VNC_MSG_SERVER_XVP 250 487 #define VNC_MSG_SERVER_TIGHT 252 488 #define VNC_MSG_SERVER_GII 253 489 #define VNC_MSG_SERVER_VMWARE_1 254 490 #define VNC_MSG_SERVER_QEMU 255 491 492 493 494 /* QEMU client -> server message IDs */ 495 #define VNC_MSG_CLIENT_QEMU_EXT_KEY_EVENT 0 496 #define VNC_MSG_CLIENT_QEMU_AUDIO 1 497 498 /* QEMU server -> client message IDs */ 499 #define VNC_MSG_SERVER_QEMU_AUDIO 1 500 501 502 503 /* QEMU client -> server audio message IDs */ 504 #define VNC_MSG_CLIENT_QEMU_AUDIO_ENABLE 0 505 #define VNC_MSG_CLIENT_QEMU_AUDIO_DISABLE 1 506 #define VNC_MSG_CLIENT_QEMU_AUDIO_SET_FORMAT 2 507 508 /* QEMU server -> client audio message IDs */ 509 #define VNC_MSG_SERVER_QEMU_AUDIO_END 0 510 #define VNC_MSG_SERVER_QEMU_AUDIO_BEGIN 1 511 #define VNC_MSG_SERVER_QEMU_AUDIO_DATA 2 512 513 514 /***************************************************************************** 515 * 516 * Internal APIs 517 * 518 *****************************************************************************/ 519 520 /* Event loop functions */ 521 void vnc_client_read(void *opaque); 522 void vnc_client_write(void *opaque); 523 524 long vnc_client_read_buf(VncState *vs, uint8_t *data, size_t datalen); 525 long vnc_client_write_buf(VncState *vs, const uint8_t *data, size_t datalen); 526 527 /* Protocol I/O functions */ 528 void vnc_write(VncState *vs, const void *data, size_t len); 529 void vnc_write_u32(VncState *vs, uint32_t value); 530 void vnc_write_s32(VncState *vs, int32_t value); 531 void vnc_write_u16(VncState *vs, uint16_t value); 532 void vnc_write_u8(VncState *vs, uint8_t value); 533 void vnc_flush(VncState *vs); 534 void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting); 535 void vnc_disconnect_finish(VncState *vs); 536 void vnc_init_state(VncState *vs); 537 538 539 /* Buffer I/O functions */ 540 uint32_t read_u32(uint8_t *data, size_t offset); 541 542 /* Protocol stage functions */ 543 void vnc_client_error(VncState *vs); 544 int vnc_client_io_error(VncState *vs, int ret, int last_errno); 545 546 void start_client_init(VncState *vs); 547 void start_auth_vnc(VncState *vs); 548 549 /* Buffer management */ 550 void buffer_reserve(Buffer *buffer, size_t len); 551 void buffer_reset(Buffer *buffer); 552 void buffer_free(Buffer *buffer); 553 void buffer_append(Buffer *buffer, const void *data, size_t len); 554 void buffer_advance(Buffer *buf, size_t len); 555 uint8_t *buffer_end(Buffer *buffer); 556 557 558 /* Misc helpers */ 559 560 char *vnc_socket_local_addr(const char *format, int fd); 561 char *vnc_socket_remote_addr(const char *format, int fd); 562 563 static inline uint32_t vnc_has_feature(VncState *vs, int feature) { 564 return (vs->features & (1 << feature)); 565 } 566 567 /* Framebuffer */ 568 void vnc_framebuffer_update(VncState *vs, int x, int y, int w, int h, 569 int32_t encoding); 570 571 /* server fb is in PIXMAN_x8r8g8b8 */ 572 #define VNC_SERVER_FB_FORMAT PIXMAN_FORMAT(32, PIXMAN_TYPE_ARGB, 0, 8, 8, 8) 573 #define VNC_SERVER_FB_BITS (PIXMAN_FORMAT_BPP(VNC_SERVER_FB_FORMAT)) 574 #define VNC_SERVER_FB_BYTES ((VNC_SERVER_FB_BITS+7)/8) 575 576 void *vnc_server_fb_ptr(VncDisplay *vd, int x, int y); 577 int vnc_server_fb_stride(VncDisplay *vd); 578 579 void vnc_convert_pixel(VncState *vs, uint8_t *buf, uint32_t v); 580 double vnc_update_freq(VncState *vs, int x, int y, int w, int h); 581 void vnc_sent_lossy_rect(VncState *vs, int x, int y, int w, int h); 582 583 /* Encodings */ 584 int vnc_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); 585 586 int vnc_raw_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); 587 588 int vnc_hextile_send_framebuffer_update(VncState *vs, int x, 589 int y, int w, int h); 590 void vnc_hextile_set_pixel_conversion(VncState *vs, int generic); 591 592 void *vnc_zlib_zalloc(void *x, unsigned items, unsigned size); 593 void vnc_zlib_zfree(void *x, void *addr); 594 int vnc_zlib_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); 595 void vnc_zlib_clear(VncState *vs); 596 597 int vnc_tight_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); 598 int vnc_tight_png_send_framebuffer_update(VncState *vs, int x, int y, 599 int w, int h); 600 void vnc_tight_clear(VncState *vs); 601 602 int vnc_zrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); 603 int vnc_zywrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); 604 void vnc_zrle_clear(VncState *vs); 605 606 #endif /* __QEMU_VNC_H */ 607