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/clipboard.h"
33 #include "ui/console.h"
34 #include "audio/audio.h"
35 #include "qemu/bitmap.h"
36 #include "crypto/tlssession.h"
37 #include "qemu/buffer.h"
38 #include "io/channel-socket.h"
39 #include "io/channel-tls.h"
40 #include "io/net-listener.h"
41 #include "authz/base.h"
42 #include <zlib.h>
43
44 #include "keymaps.h"
45 #include "vnc-palette.h"
46 #include "vnc-enc-zrle.h"
47 #include "ui/kbd-state.h"
48
49 // #define _VNC_DEBUG 1
50
51 #ifdef _VNC_DEBUG
52 #define VNC_DEBUG(fmt, ...) do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
53 #else
54 #define VNC_DEBUG(fmt, ...) do { } while (0)
55 #endif
56
57 /*****************************************************************************
58 *
59 * Core data structures
60 *
61 *****************************************************************************/
62
63 typedef struct VncState VncState;
64 typedef struct VncJob VncJob;
65 typedef struct VncRect VncRect;
66 typedef struct VncRectEntry VncRectEntry;
67
68 typedef int VncReadEvent(VncState *vs, uint8_t *data, size_t len);
69
70 typedef void VncWritePixels(VncState *vs, void *data, int size);
71
72 typedef void VncSendHextileTile(VncState *vs,
73 int x, int y, int w, int h,
74 void *last_bg,
75 void *last_fg,
76 int *has_bg, int *has_fg);
77
78 /* VNC_DIRTY_PIXELS_PER_BIT is the number of dirty pixels represented
79 * by one bit in the dirty bitmap, should be a power of 2 */
80 #define VNC_DIRTY_PIXELS_PER_BIT 16
81
82 /* VNC_MAX_WIDTH must be a multiple of VNC_DIRTY_PIXELS_PER_BIT. */
83
84 #define VNC_MAX_WIDTH ROUND_UP(5120, VNC_DIRTY_PIXELS_PER_BIT)
85 #define VNC_MAX_HEIGHT 2160
86
87 /* VNC_DIRTY_BITS is the number of bits in the dirty bitmap. */
88 #define VNC_DIRTY_BITS (VNC_MAX_WIDTH / VNC_DIRTY_PIXELS_PER_BIT)
89
90 /* VNC_DIRTY_BPL (BPL = bits per line) might be greater than
91 * VNC_DIRTY_BITS due to alignment */
92 #define VNC_DIRTY_BPL(x) (sizeof((x)->dirty) / VNC_MAX_HEIGHT * BITS_PER_BYTE)
93
94 #define VNC_STAT_RECT 64
95 #define VNC_STAT_COLS (VNC_MAX_WIDTH / VNC_STAT_RECT)
96 #define VNC_STAT_ROWS (VNC_MAX_HEIGHT / VNC_STAT_RECT)
97
98 #define VNC_AUTH_CHALLENGE_SIZE 16
99
100 typedef struct VncDisplay VncDisplay;
101
102 #include "vnc-auth-vencrypt.h"
103 #ifdef CONFIG_VNC_SASL
104 #include "vnc-auth-sasl.h"
105 #endif
106 #include "vnc-ws.h"
107
108 struct VncRectStat
109 {
110 /* time of last 10 updates, to find update frequency */
111 struct timeval times[10];
112 int idx;
113
114 double freq; /* Update frequency (in Hz) */
115 bool updated; /* Already updated during this refresh */
116 };
117
118 typedef struct VncRectStat VncRectStat;
119
120 struct VncSurface
121 {
122 struct timeval last_freq_check;
123 DECLARE_BITMAP(dirty[VNC_MAX_HEIGHT],
124 VNC_MAX_WIDTH / VNC_DIRTY_PIXELS_PER_BIT);
125 VncRectStat stats[VNC_STAT_ROWS][VNC_STAT_COLS];
126 pixman_image_t *fb;
127 pixman_format_code_t format;
128 };
129
130 typedef enum VncShareMode {
131 VNC_SHARE_MODE_CONNECTING = 1,
132 VNC_SHARE_MODE_SHARED,
133 VNC_SHARE_MODE_EXCLUSIVE,
134 VNC_SHARE_MODE_DISCONNECTED,
135 } VncShareMode;
136
137 typedef enum VncSharePolicy {
138 VNC_SHARE_POLICY_IGNORE = 1,
139 VNC_SHARE_POLICY_ALLOW_EXCLUSIVE,
140 VNC_SHARE_POLICY_FORCE_SHARED,
141 } VncSharePolicy;
142
143 struct VncDisplay
144 {
145 QTAILQ_HEAD(, VncState) clients;
146 int num_connecting;
147 int num_shared;
148 int num_exclusive;
149 int connections_limit;
150 VncSharePolicy share_policy;
151 QIONetListener *listener;
152 QIONetListener *wslistener;
153 DisplaySurface *ds;
154 DisplayChangeListener dcl;
155 kbd_layout_t *kbd_layout;
156 int lock_key_sync;
157 QEMUPutLEDEntry *led;
158 int ledstate;
159 QKbdState *kbd;
160 QemuMutex mutex;
161
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 int true_width; /* server surface width before rounding up */
168
169 const char *id;
170 QTAILQ_ENTRY(VncDisplay) next;
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 bool power_control;
180 QCryptoTLSCreds *tlscreds;
181 QAuthZ *tlsauthz;
182 char *tlsauthzid;
183 #ifdef CONFIG_VNC_SASL
184 VncDisplaySASL sasl;
185 #endif
186
187 AudioState *audio_state;
188 };
189
190 typedef struct VncTight {
191 int type;
192 uint8_t quality;
193 uint8_t compression;
194 uint8_t pixel24;
195 Buffer tight;
196 Buffer tmp;
197 Buffer zlib;
198 Buffer gradient;
199 #ifdef CONFIG_VNC_JPEG
200 Buffer jpeg;
201 #endif
202 #ifdef CONFIG_PNG
203 Buffer png;
204 #endif
205 int levels[4];
206 z_stream stream[4];
207 } VncTight;
208
209 typedef struct VncHextile {
210 VncSendHextileTile *send_tile;
211 } VncHextile;
212
213 typedef struct VncZlib {
214 Buffer zlib;
215 Buffer tmp;
216 z_stream stream;
217 int level;
218 } VncZlib;
219
220 typedef struct VncZrle {
221 int type;
222 Buffer fb;
223 Buffer zrle;
224 Buffer tmp;
225 Buffer zlib;
226 z_stream stream;
227 VncPalette palette;
228 } VncZrle;
229
230 typedef struct VncZywrle {
231 int buf[VNC_ZRLE_TILE_WIDTH * VNC_ZRLE_TILE_HEIGHT];
232 } VncZywrle;
233
234 struct VncRect
235 {
236 int x;
237 int y;
238 int w;
239 int h;
240 };
241
242 struct VncRectEntry
243 {
244 struct VncRect rect;
245 QLIST_ENTRY(VncRectEntry) next;
246 };
247
248 struct VncJob
249 {
250 VncState *vs;
251
252 QLIST_HEAD(, VncRectEntry) rectangles;
253 QTAILQ_ENTRY(VncJob) next;
254 };
255
256 typedef enum {
257 VNC_STATE_UPDATE_NONE,
258 VNC_STATE_UPDATE_INCREMENTAL,
259 VNC_STATE_UPDATE_FORCE,
260 } VncStateUpdate;
261
262 #define VNC_MAGIC ((uint64_t)0x05b3f069b3d204bb)
263
264 struct VncState
265 {
266 uint64_t magic;
267 QIOChannelSocket *sioc; /* The underlying socket */
268 QIOChannel *ioc; /* The channel currently used for I/O */
269 guint ioc_tag;
270 gboolean disconnecting;
271
272 DECLARE_BITMAP(dirty[VNC_MAX_HEIGHT], VNC_DIRTY_BITS);
273 uint8_t **lossy_rect; /* Not an Array to avoid costly memcpy in
274 * vnc-jobs-async.c */
275
276 VncDisplay *vd;
277 VncStateUpdate update; /* Most recent pending request from client */
278 VncStateUpdate job_update; /* Currently processed by job thread */
279 int has_dirty;
280 uint32_t features;
281 int absolute;
282 int last_x;
283 int last_y;
284 uint32_t last_bmask;
285 size_t client_width; /* limited to u16 by RFB proto */
286 size_t client_height; /* limited to u16 by RFB proto */
287 VncShareMode share_mode;
288
289 uint32_t vnc_encoding;
290
291 int major;
292 int minor;
293
294 int auth;
295 int subauth; /* Used by VeNCrypt */
296 char challenge[VNC_AUTH_CHALLENGE_SIZE];
297 QCryptoTLSSession *tls; /* Borrowed pointer from channel, don't free */
298 #ifdef CONFIG_VNC_SASL
299 VncStateSASL sasl;
300 #endif
301 bool encode_ws;
302 bool websocket;
303
304 #ifdef CONFIG_VNC
305 VncClientInfo *info;
306 #endif
307
308 /* Job thread bottom half has put data for a forced update
309 * into the output buffer. This offset points to the end of
310 * the update data in the output buffer. This lets us determine
311 * when a force update is fully sent to the client, allowing
312 * us to process further forced updates. */
313 size_t force_update_offset;
314 /* We allow multiple incremental updates or audio capture
315 * samples to be queued in output buffer, provided the
316 * buffer size doesn't exceed this threshold. The value
317 * is calculating dynamically based on framebuffer size
318 * and audio sample settings in vnc_update_throttle_offset() */
319 size_t throttle_output_offset;
320 Buffer output;
321 Buffer input;
322 /* current output mode information */
323 VncWritePixels *write_pixels;
324 PixelFormat client_pf;
325 pixman_format_code_t client_format;
326 bool client_be;
327
328 CaptureVoiceOut *audio_cap;
329 struct audsettings as;
330
331 VncReadEvent *read_handler;
332 size_t read_handler_expect;
333
334 bool abort;
335 QemuMutex output_mutex;
336 QEMUBH *bh;
337 Buffer jobs_buffer;
338
339 /* Encoding specific, if you add something here, don't forget to
340 * update vnc_async_encoding_start()
341 */
342 VncTight *tight;
343 VncZlib zlib;
344 VncHextile hextile;
345 VncZrle *zrle;
346 VncZywrle zywrle;
347
348 Notifier mouse_mode_notifier;
349
350 QemuClipboardPeer cbpeer;
351 QemuClipboardInfo *cbinfo;
352 uint32_t cbpending;
353
354 QTAILQ_ENTRY(VncState) next;
355 };
356
357
358 /*****************************************************************************
359 *
360 * Authentication modes
361 *
362 *****************************************************************************/
363
364 enum {
365 VNC_AUTH_INVALID = 0,
366 VNC_AUTH_NONE = 1,
367 VNC_AUTH_VNC = 2,
368 VNC_AUTH_RA2 = 5,
369 VNC_AUTH_RA2NE = 6,
370 VNC_AUTH_TIGHT = 16,
371 VNC_AUTH_ULTRA = 17,
372 VNC_AUTH_TLS = 18, /* Supported in GTK-VNC & VINO */
373 VNC_AUTH_VENCRYPT = 19, /* Supported in GTK-VNC & VeNCrypt */
374 VNC_AUTH_SASL = 20, /* Supported in GTK-VNC & VINO */
375 };
376
377 enum {
378 VNC_AUTH_VENCRYPT_PLAIN = 256,
379 VNC_AUTH_VENCRYPT_TLSNONE = 257,
380 VNC_AUTH_VENCRYPT_TLSVNC = 258,
381 VNC_AUTH_VENCRYPT_TLSPLAIN = 259,
382 VNC_AUTH_VENCRYPT_X509NONE = 260,
383 VNC_AUTH_VENCRYPT_X509VNC = 261,
384 VNC_AUTH_VENCRYPT_X509PLAIN = 262,
385 VNC_AUTH_VENCRYPT_X509SASL = 263,
386 VNC_AUTH_VENCRYPT_TLSSASL = 264,
387 };
388
389
390 /*****************************************************************************
391 *
392 * Encoding types
393 *
394 *****************************************************************************/
395
396 #define VNC_ENCODING_RAW 0x00000000
397 #define VNC_ENCODING_COPYRECT 0x00000001
398 #define VNC_ENCODING_RRE 0x00000002
399 #define VNC_ENCODING_CORRE 0x00000004
400 #define VNC_ENCODING_HEXTILE 0x00000005
401 #define VNC_ENCODING_ZLIB 0x00000006
402 #define VNC_ENCODING_TIGHT 0x00000007
403 #define VNC_ENCODING_ZLIBHEX 0x00000008
404 #define VNC_ENCODING_TRLE 0x0000000f
405 #define VNC_ENCODING_ZRLE 0x00000010
406 #define VNC_ENCODING_ZYWRLE 0x00000011
407 #define VNC_ENCODING_COMPRESSLEVEL0 0xFFFFFF00 /* -256 */
408 #define VNC_ENCODING_QUALITYLEVEL0 0xFFFFFFE0 /* -32 */
409 #define VNC_ENCODING_XCURSOR 0xFFFFFF10 /* -240 */
410 #define VNC_ENCODING_RICH_CURSOR 0xFFFFFF11 /* -239 */
411 #define VNC_ENCODING_POINTER_POS 0xFFFFFF18 /* -232 */
412 #define VNC_ENCODING_LASTRECT 0xFFFFFF20 /* -224 */
413 #define VNC_ENCODING_DESKTOPRESIZE 0xFFFFFF21 /* -223 */
414 #define VNC_ENCODING_POINTER_TYPE_CHANGE 0XFFFFFEFF /* -257 */
415 #define VNC_ENCODING_EXT_KEY_EVENT 0XFFFFFEFE /* -258 */
416 #define VNC_ENCODING_AUDIO 0XFFFFFEFD /* -259 */
417 #define VNC_ENCODING_TIGHT_PNG 0xFFFFFEFC /* -260 */
418 #define VNC_ENCODING_LED_STATE 0XFFFFFEFB /* -261 */
419 #define VNC_ENCODING_DESKTOP_RESIZE_EXT 0XFFFFFECC /* -308 */
420 #define VNC_ENCODING_XVP 0XFFFFFECB /* -309 */
421 #define VNC_ENCODING_ALPHA_CURSOR 0XFFFFFEC6 /* -314 */
422 #define VNC_ENCODING_WMVi 0x574D5669
423 #define VNC_ENCODING_CLIPBOARD_EXT 0xc0a1e5ce
424
425 /*****************************************************************************
426 *
427 * Other tight constants
428 *
429 *****************************************************************************/
430
431 /*
432 * Vendors known by TightVNC: standard VNC/RealVNC, TridiaVNC, and TightVNC.
433 */
434
435 #define VNC_TIGHT_CCB_RESET_MASK (0x0f)
436 #define VNC_TIGHT_CCB_TYPE_MASK (0x0f << 4)
437 #define VNC_TIGHT_CCB_TYPE_FILL (0x08 << 4)
438 #define VNC_TIGHT_CCB_TYPE_JPEG (0x09 << 4)
439 #define VNC_TIGHT_CCB_TYPE_PNG (0x0A << 4)
440 #define VNC_TIGHT_CCB_BASIC_MAX (0x07 << 4)
441 #define VNC_TIGHT_CCB_BASIC_ZLIB (0x03 << 4)
442 #define VNC_TIGHT_CCB_BASIC_FILTER (0x04 << 4)
443
444 /*****************************************************************************
445 *
446 * Features
447 *
448 *****************************************************************************/
449
450 enum VncFeatures {
451 VNC_FEATURE_RESIZE,
452 VNC_FEATURE_RESIZE_EXT,
453 VNC_FEATURE_HEXTILE,
454 VNC_FEATURE_POINTER_TYPE_CHANGE,
455 VNC_FEATURE_WMVI,
456 VNC_FEATURE_TIGHT,
457 VNC_FEATURE_ZLIB,
458 VNC_FEATURE_RICH_CURSOR,
459 VNC_FEATURE_ALPHA_CURSOR,
460 VNC_FEATURE_TIGHT_PNG,
461 VNC_FEATURE_ZRLE,
462 VNC_FEATURE_ZYWRLE,
463 VNC_FEATURE_LED_STATE,
464 VNC_FEATURE_XVP,
465 VNC_FEATURE_CLIPBOARD_EXT,
466 VNC_FEATURE_AUDIO,
467 };
468
469
470 /* Client -> Server message IDs */
471 #define VNC_MSG_CLIENT_SET_PIXEL_FORMAT 0
472 #define VNC_MSG_CLIENT_SET_ENCODINGS 2
473 #define VNC_MSG_CLIENT_FRAMEBUFFER_UPDATE_REQUEST 3
474 #define VNC_MSG_CLIENT_KEY_EVENT 4
475 #define VNC_MSG_CLIENT_POINTER_EVENT 5
476 #define VNC_MSG_CLIENT_CUT_TEXT 6
477 #define VNC_MSG_CLIENT_VMWARE_0 127
478 #define VNC_MSG_CLIENT_CALL_CONTROL 249
479 #define VNC_MSG_CLIENT_XVP 250
480 #define VNC_MSG_CLIENT_SET_DESKTOP_SIZE 251
481 #define VNC_MSG_CLIENT_TIGHT 252
482 #define VNC_MSG_CLIENT_GII 253
483 #define VNC_MSG_CLIENT_VMWARE_1 254
484 #define VNC_MSG_CLIENT_QEMU 255
485
486 /* Server -> Client message IDs */
487 #define VNC_MSG_SERVER_FRAMEBUFFER_UPDATE 0
488 #define VNC_MSG_SERVER_SET_COLOUR_MAP_ENTRIES 1
489 #define VNC_MSG_SERVER_BELL 2
490 #define VNC_MSG_SERVER_CUT_TEXT 3
491 #define VNC_MSG_SERVER_VMWARE_0 127
492 #define VNC_MSG_SERVER_CALL_CONTROL 249
493 #define VNC_MSG_SERVER_XVP 250
494 #define VNC_MSG_SERVER_TIGHT 252
495 #define VNC_MSG_SERVER_GII 253
496 #define VNC_MSG_SERVER_VMWARE_1 254
497 #define VNC_MSG_SERVER_QEMU 255
498
499
500
501 /* QEMU client -> server message IDs */
502 #define VNC_MSG_CLIENT_QEMU_EXT_KEY_EVENT 0
503 #define VNC_MSG_CLIENT_QEMU_AUDIO 1
504
505 /* QEMU server -> client message IDs */
506 #define VNC_MSG_SERVER_QEMU_AUDIO 1
507
508
509
510 /* QEMU client -> server audio message IDs */
511 #define VNC_MSG_CLIENT_QEMU_AUDIO_ENABLE 0
512 #define VNC_MSG_CLIENT_QEMU_AUDIO_DISABLE 1
513 #define VNC_MSG_CLIENT_QEMU_AUDIO_SET_FORMAT 2
514
515 /* QEMU server -> client audio message IDs */
516 #define VNC_MSG_SERVER_QEMU_AUDIO_END 0
517 #define VNC_MSG_SERVER_QEMU_AUDIO_BEGIN 1
518 #define VNC_MSG_SERVER_QEMU_AUDIO_DATA 2
519
520 /* XVP server -> client status code */
521 #define VNC_XVP_CODE_FAIL 0
522 #define VNC_XVP_CODE_INIT 1
523
524 /* XVP client -> server action request */
525 #define VNC_XVP_ACTION_SHUTDOWN 2
526 #define VNC_XVP_ACTION_REBOOT 3
527 #define VNC_XVP_ACTION_RESET 4
528
529 /* extended clipboard flags */
530 #define VNC_CLIPBOARD_TEXT (1 << 0)
531 #define VNC_CLIPBOARD_RTF (1 << 1)
532 #define VNC_CLIPBOARD_HTML (1 << 2)
533 #define VNC_CLIPBOARD_DIB (1 << 3)
534 #define VNC_CLIPBOARD_FILES (1 << 4)
535 #define VNC_CLIPBOARD_CAPS (1 << 24)
536 #define VNC_CLIPBOARD_REQUEST (1 << 25)
537 #define VNC_CLIPBOARD_PEEK (1 << 26)
538 #define VNC_CLIPBOARD_NOTIFY (1 << 27)
539 #define VNC_CLIPBOARD_PROVIDE (1 << 28)
540
541 /*****************************************************************************
542 *
543 * Internal APIs
544 *
545 *****************************************************************************/
546
547 /* Event loop functions */
548 gboolean vnc_client_io(QIOChannel *ioc,
549 GIOCondition condition,
550 void *opaque);
551
552 size_t vnc_client_read_buf(VncState *vs, uint8_t *data, size_t datalen);
553 size_t vnc_client_write_buf(VncState *vs, const uint8_t *data, size_t datalen);
554
555 /* Protocol I/O functions */
556 void vnc_write(VncState *vs, const void *data, size_t len);
557 void vnc_write_u32(VncState *vs, uint32_t value);
558 void vnc_write_s32(VncState *vs, int32_t value);
559 void vnc_write_u16(VncState *vs, uint16_t value);
560 void vnc_write_u8(VncState *vs, uint8_t value);
561 void vnc_flush(VncState *vs);
562 void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting);
563 void vnc_disconnect_finish(VncState *vs);
564 void vnc_start_protocol(VncState *vs);
565
566
567 /* Buffer I/O functions */
568 uint32_t read_u32(uint8_t *data, size_t offset);
569
570 /* Protocol stage functions */
571 void vnc_client_error(VncState *vs);
572 size_t vnc_client_io_error(VncState *vs, ssize_t ret, Error *err);
573
574 void start_client_init(VncState *vs);
575 void start_auth_vnc(VncState *vs);
576
577
578 /* Misc helpers */
579
vnc_has_feature(VncState * vs,int feature)580 static inline uint32_t vnc_has_feature(VncState *vs, int feature) {
581 return (vs->features & (1 << feature));
582 }
583
vnc_set_feature(VncState * vs,enum VncFeatures feature)584 static inline void vnc_set_feature(VncState *vs, enum VncFeatures feature)
585 {
586 vs->features |= (1 << feature);
587 }
588
589 /* Framebuffer */
590 void vnc_framebuffer_update(VncState *vs, int x, int y, int w, int h,
591 int32_t encoding);
592
593 /* server fb is in PIXMAN_x8r8g8b8 */
594 #define VNC_SERVER_FB_FORMAT PIXMAN_FORMAT(32, PIXMAN_TYPE_ARGB, 0, 8, 8, 8)
595 #define VNC_SERVER_FB_BITS (PIXMAN_FORMAT_BPP(VNC_SERVER_FB_FORMAT))
596 #define VNC_SERVER_FB_BYTES ((VNC_SERVER_FB_BITS+7)/8)
597
598 void *vnc_server_fb_ptr(VncDisplay *vd, int x, int y);
599 int vnc_server_fb_stride(VncDisplay *vd);
600
601 void vnc_convert_pixel(VncState *vs, uint8_t *buf, uint32_t v);
602 double vnc_update_freq(VncState *vs, int x, int y, int w, int h);
603 void vnc_sent_lossy_rect(VncState *vs, int x, int y, int w, int h);
604
605 /* Encodings */
606 int vnc_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
607
608 int vnc_raw_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
609
610 int vnc_hextile_send_framebuffer_update(VncState *vs, int x,
611 int y, int w, int h);
612 void vnc_hextile_set_pixel_conversion(VncState *vs, int generic);
613
614 void *vnc_zlib_zalloc(void *x, unsigned items, unsigned size);
615 void vnc_zlib_zfree(void *x, void *addr);
616 int vnc_zlib_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
617 void vnc_zlib_clear(VncState *vs);
618
619 int vnc_tight_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
620 int vnc_tight_png_send_framebuffer_update(VncState *vs, int x, int y,
621 int w, int h);
622 void vnc_tight_clear(VncState *vs);
623
624 int vnc_zrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
625 int vnc_zywrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
626 void vnc_zrle_clear(VncState *vs);
627
628 /* vnc-clipboard.c */
629 void vnc_server_cut_text_caps(VncState *vs);
630 void vnc_client_cut_text(VncState *vs, size_t len, uint8_t *text);
631 void vnc_client_cut_text_ext(VncState *vs, int32_t len, uint32_t flags, uint8_t *data);
632
633 #endif /* QEMU_VNC_H */
634