Merge remote-tracking branch 'remotes/ehabkost/tags/python-next-pull-request' into...
[qemu.git] / 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/queue.h"
31 #include "qemu/thread.h"
32 #include "ui/console.h"
33 #include "audio/audio.h"
34 #include "qemu/bitmap.h"
35 #include "crypto/tlssession.h"
36 #include "qemu/buffer.h"
37 #include "io/channel-socket.h"
38 #include "io/channel-tls.h"
39 #include "io/net-listener.h"
40 #include "authz/base.h"
41 #include <zlib.h>
42
43 #include "keymaps.h"
44 #include "vnc-palette.h"
45 #include "vnc-enc-zrle.h"
46 #include "ui/kbd-state.h"
47
48 // #define _VNC_DEBUG 1
49
50 #ifdef _VNC_DEBUG
51 #define VNC_DEBUG(fmt, ...) do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
52 #else
53 #define VNC_DEBUG(fmt, ...) do { } while (0)
54 #endif
55
56 /*****************************************************************************
57 *
58 * Core data structures
59 *
60 *****************************************************************************/
61
62 typedef struct VncState VncState;
63 typedef struct VncJob VncJob;
64 typedef struct VncRect VncRect;
65 typedef struct VncRectEntry VncRectEntry;
66
67 typedef int VncReadEvent(VncState *vs, uint8_t *data, size_t len);
68
69 typedef void VncWritePixels(VncState *vs, void *data, int size);
70
71 typedef void VncSendHextileTile(VncState *vs,
72 int x, int y, int w, int h,
73 void *last_bg,
74 void *last_fg,
75 int *has_bg, int *has_fg);
76
77 /* VNC_DIRTY_PIXELS_PER_BIT is the number of dirty pixels represented
78 * by one bit in the dirty bitmap, should be a power of 2 */
79 #define VNC_DIRTY_PIXELS_PER_BIT 16
80
81 /* VNC_MAX_WIDTH must be a multiple of VNC_DIRTY_PIXELS_PER_BIT. */
82
83 #define VNC_MAX_WIDTH ROUND_UP(2560, VNC_DIRTY_PIXELS_PER_BIT)
84 #define VNC_MAX_HEIGHT 2048
85
86 /* VNC_DIRTY_BITS is the number of bits in the dirty bitmap. */
87 #define VNC_DIRTY_BITS (VNC_MAX_WIDTH / VNC_DIRTY_PIXELS_PER_BIT)
88
89 /* VNC_DIRTY_BPL (BPL = bits per line) might be greater than
90 * VNC_DIRTY_BITS due to alignment */
91 #define VNC_DIRTY_BPL(x) (sizeof((x)->dirty) / VNC_MAX_HEIGHT * BITS_PER_BYTE)
92
93 #define VNC_STAT_RECT 64
94 #define VNC_STAT_COLS (VNC_MAX_WIDTH / VNC_STAT_RECT)
95 #define VNC_STAT_ROWS (VNC_MAX_HEIGHT / VNC_STAT_RECT)
96
97 #define VNC_AUTH_CHALLENGE_SIZE 16
98
99 typedef struct VncDisplay VncDisplay;
100
101 #include "vnc-auth-vencrypt.h"
102 #ifdef CONFIG_VNC_SASL
103 #include "vnc-auth-sasl.h"
104 #endif
105 #include "vnc-ws.h"
106
107 struct VncRectStat
108 {
109 /* time of last 10 updates, to find update frequency */
110 struct timeval times[10];
111 int idx;
112
113 double freq; /* Update frequency (in Hz) */
114 bool updated; /* Already updated during this refresh */
115 };
116
117 typedef struct VncRectStat VncRectStat;
118
119 struct VncSurface
120 {
121 struct timeval last_freq_check;
122 DECLARE_BITMAP(dirty[VNC_MAX_HEIGHT],
123 VNC_MAX_WIDTH / VNC_DIRTY_PIXELS_PER_BIT);
124 VncRectStat stats[VNC_STAT_ROWS][VNC_STAT_COLS];
125 pixman_image_t *fb;
126 pixman_format_code_t format;
127 };
128
129 typedef enum VncShareMode {
130 VNC_SHARE_MODE_CONNECTING = 1,
131 VNC_SHARE_MODE_SHARED,
132 VNC_SHARE_MODE_EXCLUSIVE,
133 VNC_SHARE_MODE_DISCONNECTED,
134 } VncShareMode;
135
136 typedef enum VncSharePolicy {
137 VNC_SHARE_POLICY_IGNORE = 1,
138 VNC_SHARE_POLICY_ALLOW_EXCLUSIVE,
139 VNC_SHARE_POLICY_FORCE_SHARED,
140 } VncSharePolicy;
141
142 struct VncDisplay
143 {
144 QTAILQ_HEAD(, VncState) clients;
145 int num_connecting;
146 int num_shared;
147 int num_exclusive;
148 int connections_limit;
149 VncSharePolicy share_policy;
150 QIONetListener *listener;
151 QIONetListener *wslistener;
152 DisplaySurface *ds;
153 DisplayChangeListener dcl;
154 kbd_layout_t *kbd_layout;
155 int lock_key_sync;
156 QEMUPutLEDEntry *led;
157 int ledstate;
158 QKbdState *kbd;
159 QemuMutex mutex;
160
161 QEMUCursor *cursor;
162 int cursor_msize;
163 uint8_t *cursor_mask;
164
165 struct VncSurface guest; /* guest visible surface (aka ds->surface) */
166 pixman_image_t *server; /* vnc server surface */
167
168 const char *id;
169 QTAILQ_ENTRY(VncDisplay) next;
170 bool is_unix;
171 char *password;
172 time_t expires;
173 int auth;
174 int subauth; /* Used by VeNCrypt */
175 int ws_auth; /* Used by websockets */
176 int ws_subauth; /* Used by websockets */
177 bool lossy;
178 bool non_adaptive;
179 QCryptoTLSCreds *tlscreds;
180 QAuthZ *tlsauthz;
181 char *tlsauthzid;
182 #ifdef CONFIG_VNC_SASL
183 VncDisplaySASL sasl;
184 #endif
185
186 AudioState *audio_state;
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 typedef enum {
256 VNC_STATE_UPDATE_NONE,
257 VNC_STATE_UPDATE_INCREMENTAL,
258 VNC_STATE_UPDATE_FORCE,
259 } VncStateUpdate;
260
261 #define VNC_MAGIC ((uint64_t)0x05b3f069b3d204bb)
262
263 struct VncState
264 {
265 uint64_t magic;
266 QIOChannelSocket *sioc; /* The underlying socket */
267 QIOChannel *ioc; /* The channel currently used for I/O */
268 guint ioc_tag;
269 gboolean disconnecting;
270
271 DECLARE_BITMAP(dirty[VNC_MAX_HEIGHT], VNC_DIRTY_BITS);
272 uint8_t **lossy_rect; /* Not an Array to avoid costly memcpy in
273 * vnc-jobs-async.c */
274
275 VncDisplay *vd;
276 VncStateUpdate update; /* Most recent pending request from client */
277 VncStateUpdate job_update; /* Currently processed by job thread */
278 int has_dirty;
279 uint32_t features;
280 int absolute;
281 int last_x;
282 int last_y;
283 uint32_t last_bmask;
284 size_t client_width; /* limited to u16 by RFB proto */
285 size_t client_height; /* limited to u16 by RFB proto */
286 VncShareMode share_mode;
287
288 uint32_t vnc_encoding;
289
290 int major;
291 int minor;
292
293 int auth;
294 int subauth; /* Used by VeNCrypt */
295 char challenge[VNC_AUTH_CHALLENGE_SIZE];
296 QCryptoTLSSession *tls; /* Borrowed pointer from channel, don't free */
297 #ifdef CONFIG_VNC_SASL
298 VncStateSASL sasl;
299 #endif
300 bool encode_ws;
301 bool websocket;
302
303 #ifdef CONFIG_VNC
304 VncClientInfo *info;
305 #endif
306
307 /* Job thread bottom half has put data for a forced update
308 * into the output buffer. This offset points to the end of
309 * the update data in the output buffer. This lets us determine
310 * when a force update is fully sent to the client, allowing
311 * us to process further forced updates. */
312 size_t force_update_offset;
313 /* We allow multiple incremental updates or audio capture
314 * samples to be queued in output buffer, provided the
315 * buffer size doesn't exceed this threshold. The value
316 * is calculating dynamically based on framebuffer size
317 * and audio sample settings in vnc_update_throttle_offset() */
318 size_t throttle_output_offset;
319 Buffer output;
320 Buffer input;
321 /* current output mode information */
322 VncWritePixels *write_pixels;
323 PixelFormat client_pf;
324 pixman_format_code_t client_format;
325 bool client_be;
326
327 CaptureVoiceOut *audio_cap;
328 struct audsettings as;
329
330 VncReadEvent *read_handler;
331 size_t read_handler_expect;
332
333 bool abort;
334 QemuMutex output_mutex;
335 QEMUBH *bh;
336 Buffer jobs_buffer;
337
338 /* Encoding specific, if you add something here, don't forget to
339 * update vnc_async_encoding_start()
340 */
341 VncTight *tight;
342 VncZlib zlib;
343 VncHextile hextile;
344 VncZrle *zrle;
345 VncZywrle zywrle;
346
347 Notifier mouse_mode_notifier;
348
349 QTAILQ_ENTRY(VncState) next;
350 };
351
352
353 /*****************************************************************************
354 *
355 * Authentication modes
356 *
357 *****************************************************************************/
358
359 enum {
360 VNC_AUTH_INVALID = 0,
361 VNC_AUTH_NONE = 1,
362 VNC_AUTH_VNC = 2,
363 VNC_AUTH_RA2 = 5,
364 VNC_AUTH_RA2NE = 6,
365 VNC_AUTH_TIGHT = 16,
366 VNC_AUTH_ULTRA = 17,
367 VNC_AUTH_TLS = 18, /* Supported in GTK-VNC & VINO */
368 VNC_AUTH_VENCRYPT = 19, /* Supported in GTK-VNC & VeNCrypt */
369 VNC_AUTH_SASL = 20, /* Supported in GTK-VNC & VINO */
370 };
371
372 enum {
373 VNC_AUTH_VENCRYPT_PLAIN = 256,
374 VNC_AUTH_VENCRYPT_TLSNONE = 257,
375 VNC_AUTH_VENCRYPT_TLSVNC = 258,
376 VNC_AUTH_VENCRYPT_TLSPLAIN = 259,
377 VNC_AUTH_VENCRYPT_X509NONE = 260,
378 VNC_AUTH_VENCRYPT_X509VNC = 261,
379 VNC_AUTH_VENCRYPT_X509PLAIN = 262,
380 VNC_AUTH_VENCRYPT_X509SASL = 263,
381 VNC_AUTH_VENCRYPT_TLSSASL = 264,
382 };
383
384
385 /*****************************************************************************
386 *
387 * Encoding types
388 *
389 *****************************************************************************/
390
391 #define VNC_ENCODING_RAW 0x00000000
392 #define VNC_ENCODING_COPYRECT 0x00000001
393 #define VNC_ENCODING_RRE 0x00000002
394 #define VNC_ENCODING_CORRE 0x00000004
395 #define VNC_ENCODING_HEXTILE 0x00000005
396 #define VNC_ENCODING_ZLIB 0x00000006
397 #define VNC_ENCODING_TIGHT 0x00000007
398 #define VNC_ENCODING_ZLIBHEX 0x00000008
399 #define VNC_ENCODING_TRLE 0x0000000f
400 #define VNC_ENCODING_ZRLE 0x00000010
401 #define VNC_ENCODING_ZYWRLE 0x00000011
402 #define VNC_ENCODING_COMPRESSLEVEL0 0xFFFFFF00 /* -256 */
403 #define VNC_ENCODING_QUALITYLEVEL0 0xFFFFFFE0 /* -32 */
404 #define VNC_ENCODING_XCURSOR 0xFFFFFF10 /* -240 */
405 #define VNC_ENCODING_RICH_CURSOR 0xFFFFFF11 /* -239 */
406 #define VNC_ENCODING_POINTER_POS 0xFFFFFF18 /* -232 */
407 #define VNC_ENCODING_LASTRECT 0xFFFFFF20 /* -224 */
408 #define VNC_ENCODING_DESKTOPRESIZE 0xFFFFFF21 /* -223 */
409 #define VNC_ENCODING_POINTER_TYPE_CHANGE 0XFFFFFEFF /* -257 */
410 #define VNC_ENCODING_EXT_KEY_EVENT 0XFFFFFEFE /* -258 */
411 #define VNC_ENCODING_AUDIO 0XFFFFFEFD /* -259 */
412 #define VNC_ENCODING_TIGHT_PNG 0xFFFFFEFC /* -260 */
413 #define VNC_ENCODING_LED_STATE 0XFFFFFEFB /* -261 */
414 #define VNC_ENCODING_WMVi 0x574D5669
415
416 /*****************************************************************************
417 *
418 * Other tight constants
419 *
420 *****************************************************************************/
421
422 /*
423 * Vendors known by TightVNC: standard VNC/RealVNC, TridiaVNC, and TightVNC.
424 */
425
426 #define VNC_TIGHT_CCB_RESET_MASK (0x0f)
427 #define VNC_TIGHT_CCB_TYPE_MASK (0x0f << 4)
428 #define VNC_TIGHT_CCB_TYPE_FILL (0x08 << 4)
429 #define VNC_TIGHT_CCB_TYPE_JPEG (0x09 << 4)
430 #define VNC_TIGHT_CCB_TYPE_PNG (0x0A << 4)
431 #define VNC_TIGHT_CCB_BASIC_MAX (0x07 << 4)
432 #define VNC_TIGHT_CCB_BASIC_ZLIB (0x03 << 4)
433 #define VNC_TIGHT_CCB_BASIC_FILTER (0x04 << 4)
434
435 /*****************************************************************************
436 *
437 * Features
438 *
439 *****************************************************************************/
440
441 #define VNC_FEATURE_RESIZE 0
442 #define VNC_FEATURE_HEXTILE 1
443 #define VNC_FEATURE_POINTER_TYPE_CHANGE 2
444 #define VNC_FEATURE_WMVI 3
445 #define VNC_FEATURE_TIGHT 4
446 #define VNC_FEATURE_ZLIB 5
447 #define VNC_FEATURE_COPYRECT 6
448 #define VNC_FEATURE_RICH_CURSOR 7
449 #define VNC_FEATURE_TIGHT_PNG 8
450 #define VNC_FEATURE_ZRLE 9
451 #define VNC_FEATURE_ZYWRLE 10
452 #define VNC_FEATURE_LED_STATE 11
453
454 #define VNC_FEATURE_RESIZE_MASK (1 << VNC_FEATURE_RESIZE)
455 #define VNC_FEATURE_HEXTILE_MASK (1 << VNC_FEATURE_HEXTILE)
456 #define VNC_FEATURE_POINTER_TYPE_CHANGE_MASK (1 << VNC_FEATURE_POINTER_TYPE_CHANGE)
457 #define VNC_FEATURE_WMVI_MASK (1 << VNC_FEATURE_WMVI)
458 #define VNC_FEATURE_TIGHT_MASK (1 << VNC_FEATURE_TIGHT)
459 #define VNC_FEATURE_ZLIB_MASK (1 << VNC_FEATURE_ZLIB)
460 #define VNC_FEATURE_COPYRECT_MASK (1 << VNC_FEATURE_COPYRECT)
461 #define VNC_FEATURE_RICH_CURSOR_MASK (1 << VNC_FEATURE_RICH_CURSOR)
462 #define VNC_FEATURE_TIGHT_PNG_MASK (1 << VNC_FEATURE_TIGHT_PNG)
463 #define VNC_FEATURE_ZRLE_MASK (1 << VNC_FEATURE_ZRLE)
464 #define VNC_FEATURE_ZYWRLE_MASK (1 << VNC_FEATURE_ZYWRLE)
465 #define VNC_FEATURE_LED_STATE_MASK (1 << VNC_FEATURE_LED_STATE)
466
467
468 /* Client -> Server message IDs */
469 #define VNC_MSG_CLIENT_SET_PIXEL_FORMAT 0
470 #define VNC_MSG_CLIENT_SET_ENCODINGS 2
471 #define VNC_MSG_CLIENT_FRAMEBUFFER_UPDATE_REQUEST 3
472 #define VNC_MSG_CLIENT_KEY_EVENT 4
473 #define VNC_MSG_CLIENT_POINTER_EVENT 5
474 #define VNC_MSG_CLIENT_CUT_TEXT 6
475 #define VNC_MSG_CLIENT_VMWARE_0 127
476 #define VNC_MSG_CLIENT_CALL_CONTROL 249
477 #define VNC_MSG_CLIENT_XVP 250
478 #define VNC_MSG_CLIENT_SET_DESKTOP_SIZE 251
479 #define VNC_MSG_CLIENT_TIGHT 252
480 #define VNC_MSG_CLIENT_GII 253
481 #define VNC_MSG_CLIENT_VMWARE_1 254
482 #define VNC_MSG_CLIENT_QEMU 255
483
484 /* Server -> Client message IDs */
485 #define VNC_MSG_SERVER_FRAMEBUFFER_UPDATE 0
486 #define VNC_MSG_SERVER_SET_COLOUR_MAP_ENTRIES 1
487 #define VNC_MSG_SERVER_BELL 2
488 #define VNC_MSG_SERVER_CUT_TEXT 3
489 #define VNC_MSG_SERVER_VMWARE_0 127
490 #define VNC_MSG_SERVER_CALL_CONTROL 249
491 #define VNC_MSG_SERVER_XVP 250
492 #define VNC_MSG_SERVER_TIGHT 252
493 #define VNC_MSG_SERVER_GII 253
494 #define VNC_MSG_SERVER_VMWARE_1 254
495 #define VNC_MSG_SERVER_QEMU 255
496
497
498
499 /* QEMU client -> server message IDs */
500 #define VNC_MSG_CLIENT_QEMU_EXT_KEY_EVENT 0
501 #define VNC_MSG_CLIENT_QEMU_AUDIO 1
502
503 /* QEMU server -> client message IDs */
504 #define VNC_MSG_SERVER_QEMU_AUDIO 1
505
506
507
508 /* QEMU client -> server audio message IDs */
509 #define VNC_MSG_CLIENT_QEMU_AUDIO_ENABLE 0
510 #define VNC_MSG_CLIENT_QEMU_AUDIO_DISABLE 1
511 #define VNC_MSG_CLIENT_QEMU_AUDIO_SET_FORMAT 2
512
513 /* QEMU server -> client audio message IDs */
514 #define VNC_MSG_SERVER_QEMU_AUDIO_END 0
515 #define VNC_MSG_SERVER_QEMU_AUDIO_BEGIN 1
516 #define VNC_MSG_SERVER_QEMU_AUDIO_DATA 2
517
518
519 /*****************************************************************************
520 *
521 * Internal APIs
522 *
523 *****************************************************************************/
524
525 /* Event loop functions */
526 gboolean vnc_client_io(QIOChannel *ioc,
527 GIOCondition condition,
528 void *opaque);
529
530 size_t vnc_client_read_buf(VncState *vs, uint8_t *data, size_t datalen);
531 size_t vnc_client_write_buf(VncState *vs, const uint8_t *data, size_t datalen);
532
533 /* Protocol I/O functions */
534 void vnc_write(VncState *vs, const void *data, size_t len);
535 void vnc_write_u32(VncState *vs, uint32_t value);
536 void vnc_write_s32(VncState *vs, int32_t value);
537 void vnc_write_u16(VncState *vs, uint16_t value);
538 void vnc_write_u8(VncState *vs, uint8_t value);
539 void vnc_flush(VncState *vs);
540 void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting);
541 void vnc_disconnect_finish(VncState *vs);
542 void vnc_start_protocol(VncState *vs);
543
544
545 /* Buffer I/O functions */
546 uint32_t read_u32(uint8_t *data, size_t offset);
547
548 /* Protocol stage functions */
549 void vnc_client_error(VncState *vs);
550 size_t vnc_client_io_error(VncState *vs, ssize_t ret, Error *err);
551
552 void start_client_init(VncState *vs);
553 void start_auth_vnc(VncState *vs);
554
555
556 /* Misc helpers */
557
558 static inline uint32_t vnc_has_feature(VncState *vs, int feature) {
559 return (vs->features & (1 << feature));
560 }
561
562 /* Framebuffer */
563 void vnc_framebuffer_update(VncState *vs, int x, int y, int w, int h,
564 int32_t encoding);
565
566 /* server fb is in PIXMAN_x8r8g8b8 */
567 #define VNC_SERVER_FB_FORMAT PIXMAN_FORMAT(32, PIXMAN_TYPE_ARGB, 0, 8, 8, 8)
568 #define VNC_SERVER_FB_BITS (PIXMAN_FORMAT_BPP(VNC_SERVER_FB_FORMAT))
569 #define VNC_SERVER_FB_BYTES ((VNC_SERVER_FB_BITS+7)/8)
570
571 void *vnc_server_fb_ptr(VncDisplay *vd, int x, int y);
572 int vnc_server_fb_stride(VncDisplay *vd);
573
574 void vnc_convert_pixel(VncState *vs, uint8_t *buf, uint32_t v);
575 double vnc_update_freq(VncState *vs, int x, int y, int w, int h);
576 void vnc_sent_lossy_rect(VncState *vs, int x, int y, int w, int h);
577
578 /* Encodings */
579 int vnc_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
580
581 int vnc_raw_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
582
583 int vnc_hextile_send_framebuffer_update(VncState *vs, int x,
584 int y, int w, int h);
585 void vnc_hextile_set_pixel_conversion(VncState *vs, int generic);
586
587 void *vnc_zlib_zalloc(void *x, unsigned items, unsigned size);
588 void vnc_zlib_zfree(void *x, void *addr);
589 int vnc_zlib_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
590 void vnc_zlib_clear(VncState *vs);
591
592 int vnc_tight_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
593 int vnc_tight_png_send_framebuffer_update(VncState *vs, int x, int y,
594 int w, int h);
595 void vnc_tight_clear(VncState *vs);
596
597 int vnc_zrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
598 int vnc_zywrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
599 void vnc_zrle_clear(VncState *vs);
600
601 #endif /* QEMU_VNC_H */