xref: /openbmc/qemu/ui/vnc.h (revision 1f1736a8)
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     bool is_unix;
172     char *password;
173     time_t expires;
174     int auth;
175     int subauth; /* Used by VeNCrypt */
176     int ws_auth; /* Used by websockets */
177     int ws_subauth; /* Used by websockets */
178     bool lossy;
179     bool non_adaptive;
180     bool power_control;
181     QCryptoTLSCreds *tlscreds;
182     QAuthZ *tlsauthz;
183     char *tlsauthzid;
184 #ifdef CONFIG_VNC_SASL
185     VncDisplaySASL sasl;
186 #endif
187 
188     AudioState *audio_state;
189 };
190 
191 typedef struct VncTight {
192     int type;
193     uint8_t quality;
194     uint8_t compression;
195     uint8_t pixel24;
196     Buffer tight;
197     Buffer tmp;
198     Buffer zlib;
199     Buffer gradient;
200 #ifdef CONFIG_VNC_JPEG
201     Buffer jpeg;
202 #endif
203 #ifdef CONFIG_PNG
204     Buffer png;
205 #endif
206     int levels[4];
207     z_stream stream[4];
208 } VncTight;
209 
210 typedef struct VncHextile {
211     VncSendHextileTile *send_tile;
212 } VncHextile;
213 
214 typedef struct VncZlib {
215     Buffer zlib;
216     Buffer tmp;
217     z_stream stream;
218     int level;
219 } VncZlib;
220 
221 typedef struct VncZrle {
222     int type;
223     Buffer fb;
224     Buffer zrle;
225     Buffer tmp;
226     Buffer zlib;
227     z_stream stream;
228     VncPalette palette;
229 } VncZrle;
230 
231 typedef struct VncZywrle {
232     int buf[VNC_ZRLE_TILE_WIDTH * VNC_ZRLE_TILE_HEIGHT];
233 } VncZywrle;
234 
235 struct VncRect
236 {
237     int x;
238     int y;
239     int w;
240     int h;
241 };
242 
243 struct VncRectEntry
244 {
245     struct VncRect rect;
246     QLIST_ENTRY(VncRectEntry) next;
247 };
248 
249 struct VncJob
250 {
251     VncState *vs;
252 
253     QLIST_HEAD(, VncRectEntry) rectangles;
254     QTAILQ_ENTRY(VncJob) next;
255 };
256 
257 typedef enum {
258     VNC_STATE_UPDATE_NONE,
259     VNC_STATE_UPDATE_INCREMENTAL,
260     VNC_STATE_UPDATE_FORCE,
261 } VncStateUpdate;
262 
263 #define VNC_MAGIC ((uint64_t)0x05b3f069b3d204bb)
264 
265 struct VncState
266 {
267     uint64_t magic;
268     QIOChannelSocket *sioc; /* The underlying socket */
269     QIOChannel *ioc; /* The channel currently used for I/O */
270     guint ioc_tag;
271     gboolean disconnecting;
272 
273     DECLARE_BITMAP(dirty[VNC_MAX_HEIGHT], VNC_DIRTY_BITS);
274     uint8_t **lossy_rect; /* Not an Array to avoid costly memcpy in
275                            * vnc-jobs-async.c */
276 
277     VncDisplay *vd;
278     VncStateUpdate update; /* Most recent pending request from client */
279     VncStateUpdate job_update; /* Currently processed by job thread */
280     int has_dirty;
281     uint32_t features;
282     int absolute;
283     int last_x;
284     int last_y;
285     uint32_t last_bmask;
286     size_t client_width; /* limited to u16 by RFB proto */
287     size_t client_height; /* limited to u16 by RFB proto */
288     VncShareMode share_mode;
289 
290     uint32_t vnc_encoding;
291 
292     int major;
293     int minor;
294 
295     int auth;
296     int subauth; /* Used by VeNCrypt */
297     char challenge[VNC_AUTH_CHALLENGE_SIZE];
298     QCryptoTLSSession *tls; /* Borrowed pointer from channel, don't free */
299 #ifdef CONFIG_VNC_SASL
300     VncStateSASL sasl;
301 #endif
302     bool encode_ws;
303     bool websocket;
304 
305 #ifdef CONFIG_VNC
306     VncClientInfo *info;
307 #endif
308 
309     /* Job thread bottom half has put data for a forced update
310      * into the output buffer. This offset points to the end of
311      * the update data in the output buffer. This lets us determine
312      * when a force update is fully sent to the client, allowing
313      * us to process further forced updates. */
314     size_t force_update_offset;
315     /* We allow multiple incremental updates or audio capture
316      * samples to be queued in output buffer, provided the
317      * buffer size doesn't exceed this threshold. The value
318      * is calculating dynamically based on framebuffer size
319      * and audio sample settings in vnc_update_throttle_offset() */
320     size_t throttle_output_offset;
321     Buffer output;
322     Buffer input;
323     /* current output mode information */
324     VncWritePixels *write_pixels;
325     PixelFormat client_pf;
326     pixman_format_code_t client_format;
327     bool client_be;
328 
329     CaptureVoiceOut *audio_cap;
330     struct audsettings as;
331 
332     VncReadEvent *read_handler;
333     size_t read_handler_expect;
334 
335     bool abort;
336     QemuMutex output_mutex;
337     QEMUBH *bh;
338     Buffer jobs_buffer;
339 
340     /* Encoding specific, if you add something here, don't forget to
341      *  update vnc_async_encoding_start()
342      */
343     VncTight *tight;
344     VncZlib zlib;
345     VncHextile hextile;
346     VncZrle *zrle;
347     VncZywrle zywrle;
348 
349     Notifier mouse_mode_notifier;
350 
351     QemuClipboardPeer cbpeer;
352     QemuClipboardInfo *cbinfo;
353     uint32_t cbpending;
354 
355     QTAILQ_ENTRY(VncState) next;
356 };
357 
358 
359 /*****************************************************************************
360  *
361  * Authentication modes
362  *
363  *****************************************************************************/
364 
365 enum {
366     VNC_AUTH_INVALID = 0,
367     VNC_AUTH_NONE = 1,
368     VNC_AUTH_VNC = 2,
369     VNC_AUTH_RA2 = 5,
370     VNC_AUTH_RA2NE = 6,
371     VNC_AUTH_TIGHT = 16,
372     VNC_AUTH_ULTRA = 17,
373     VNC_AUTH_TLS = 18,      /* Supported in GTK-VNC & VINO */
374     VNC_AUTH_VENCRYPT = 19, /* Supported in GTK-VNC & VeNCrypt */
375     VNC_AUTH_SASL = 20,     /* Supported in GTK-VNC & VINO */
376 };
377 
378 enum {
379     VNC_AUTH_VENCRYPT_PLAIN = 256,
380     VNC_AUTH_VENCRYPT_TLSNONE = 257,
381     VNC_AUTH_VENCRYPT_TLSVNC = 258,
382     VNC_AUTH_VENCRYPT_TLSPLAIN = 259,
383     VNC_AUTH_VENCRYPT_X509NONE = 260,
384     VNC_AUTH_VENCRYPT_X509VNC = 261,
385     VNC_AUTH_VENCRYPT_X509PLAIN = 262,
386     VNC_AUTH_VENCRYPT_X509SASL = 263,
387     VNC_AUTH_VENCRYPT_TLSSASL = 264,
388 };
389 
390 
391 /*****************************************************************************
392  *
393  * Encoding types
394  *
395  *****************************************************************************/
396 
397 #define VNC_ENCODING_RAW                  0x00000000
398 #define VNC_ENCODING_COPYRECT             0x00000001
399 #define VNC_ENCODING_RRE                  0x00000002
400 #define VNC_ENCODING_CORRE                0x00000004
401 #define VNC_ENCODING_HEXTILE              0x00000005
402 #define VNC_ENCODING_ZLIB                 0x00000006
403 #define VNC_ENCODING_TIGHT                0x00000007
404 #define VNC_ENCODING_ZLIBHEX              0x00000008
405 #define VNC_ENCODING_TRLE                 0x0000000f
406 #define VNC_ENCODING_ZRLE                 0x00000010
407 #define VNC_ENCODING_ZYWRLE               0x00000011
408 #define VNC_ENCODING_COMPRESSLEVEL0       0xFFFFFF00 /* -256 */
409 #define VNC_ENCODING_QUALITYLEVEL0        0xFFFFFFE0 /* -32  */
410 #define VNC_ENCODING_XCURSOR              0xFFFFFF10 /* -240 */
411 #define VNC_ENCODING_RICH_CURSOR          0xFFFFFF11 /* -239 */
412 #define VNC_ENCODING_POINTER_POS          0xFFFFFF18 /* -232 */
413 #define VNC_ENCODING_LASTRECT             0xFFFFFF20 /* -224 */
414 #define VNC_ENCODING_DESKTOPRESIZE        0xFFFFFF21 /* -223 */
415 #define VNC_ENCODING_POINTER_TYPE_CHANGE  0XFFFFFEFF /* -257 */
416 #define VNC_ENCODING_EXT_KEY_EVENT        0XFFFFFEFE /* -258 */
417 #define VNC_ENCODING_AUDIO                0XFFFFFEFD /* -259 */
418 #define VNC_ENCODING_TIGHT_PNG            0xFFFFFEFC /* -260 */
419 #define VNC_ENCODING_LED_STATE            0XFFFFFEFB /* -261 */
420 #define VNC_ENCODING_DESKTOP_RESIZE_EXT   0XFFFFFECC /* -308 */
421 #define VNC_ENCODING_XVP                  0XFFFFFECB /* -309 */
422 #define VNC_ENCODING_ALPHA_CURSOR         0XFFFFFEC6 /* -314 */
423 #define VNC_ENCODING_WMVi                 0x574D5669
424 #define VNC_ENCODING_CLIPBOARD_EXT        0xc0a1e5ce
425 
426 /*****************************************************************************
427  *
428  * Other tight constants
429  *
430  *****************************************************************************/
431 
432 /*
433  * Vendors known by TightVNC: standard VNC/RealVNC, TridiaVNC, and TightVNC.
434  */
435 
436 #define VNC_TIGHT_CCB_RESET_MASK   (0x0f)
437 #define VNC_TIGHT_CCB_TYPE_MASK    (0x0f << 4)
438 #define VNC_TIGHT_CCB_TYPE_FILL    (0x08 << 4)
439 #define VNC_TIGHT_CCB_TYPE_JPEG    (0x09 << 4)
440 #define VNC_TIGHT_CCB_TYPE_PNG     (0x0A << 4)
441 #define VNC_TIGHT_CCB_BASIC_MAX    (0x07 << 4)
442 #define VNC_TIGHT_CCB_BASIC_ZLIB   (0x03 << 4)
443 #define VNC_TIGHT_CCB_BASIC_FILTER (0x04 << 4)
444 
445 /*****************************************************************************
446  *
447  * Features
448  *
449  *****************************************************************************/
450 
451 enum VncFeatures {
452     VNC_FEATURE_RESIZE,
453     VNC_FEATURE_RESIZE_EXT,
454     VNC_FEATURE_HEXTILE,
455     VNC_FEATURE_POINTER_TYPE_CHANGE,
456     VNC_FEATURE_WMVI,
457     VNC_FEATURE_TIGHT,
458     VNC_FEATURE_ZLIB,
459     VNC_FEATURE_RICH_CURSOR,
460     VNC_FEATURE_ALPHA_CURSOR,
461     VNC_FEATURE_TIGHT_PNG,
462     VNC_FEATURE_ZRLE,
463     VNC_FEATURE_ZYWRLE,
464     VNC_FEATURE_LED_STATE,
465     VNC_FEATURE_XVP,
466     VNC_FEATURE_CLIPBOARD_EXT,
467     VNC_FEATURE_AUDIO,
468 };
469 
470 
471 /* Client -> Server message IDs */
472 #define VNC_MSG_CLIENT_SET_PIXEL_FORMAT           0
473 #define VNC_MSG_CLIENT_SET_ENCODINGS              2
474 #define VNC_MSG_CLIENT_FRAMEBUFFER_UPDATE_REQUEST 3
475 #define VNC_MSG_CLIENT_KEY_EVENT                  4
476 #define VNC_MSG_CLIENT_POINTER_EVENT              5
477 #define VNC_MSG_CLIENT_CUT_TEXT                   6
478 #define VNC_MSG_CLIENT_VMWARE_0                   127
479 #define VNC_MSG_CLIENT_CALL_CONTROL               249
480 #define VNC_MSG_CLIENT_XVP                        250
481 #define VNC_MSG_CLIENT_SET_DESKTOP_SIZE           251
482 #define VNC_MSG_CLIENT_TIGHT                      252
483 #define VNC_MSG_CLIENT_GII                        253
484 #define VNC_MSG_CLIENT_VMWARE_1                   254
485 #define VNC_MSG_CLIENT_QEMU                       255
486 
487 /* Server -> Client message IDs */
488 #define VNC_MSG_SERVER_FRAMEBUFFER_UPDATE         0
489 #define VNC_MSG_SERVER_SET_COLOUR_MAP_ENTRIES     1
490 #define VNC_MSG_SERVER_BELL                       2
491 #define VNC_MSG_SERVER_CUT_TEXT                   3
492 #define VNC_MSG_SERVER_VMWARE_0                   127
493 #define VNC_MSG_SERVER_CALL_CONTROL               249
494 #define VNC_MSG_SERVER_XVP                        250
495 #define VNC_MSG_SERVER_TIGHT                      252
496 #define VNC_MSG_SERVER_GII                        253
497 #define VNC_MSG_SERVER_VMWARE_1                   254
498 #define VNC_MSG_SERVER_QEMU                       255
499 
500 
501 
502 /* QEMU client -> server message IDs */
503 #define VNC_MSG_CLIENT_QEMU_EXT_KEY_EVENT         0
504 #define VNC_MSG_CLIENT_QEMU_AUDIO                 1
505 
506 /* QEMU server -> client message IDs */
507 #define VNC_MSG_SERVER_QEMU_AUDIO                 1
508 
509 
510 
511 /* QEMU client -> server audio message IDs */
512 #define VNC_MSG_CLIENT_QEMU_AUDIO_ENABLE          0
513 #define VNC_MSG_CLIENT_QEMU_AUDIO_DISABLE         1
514 #define VNC_MSG_CLIENT_QEMU_AUDIO_SET_FORMAT      2
515 
516 /* QEMU server -> client audio message IDs */
517 #define VNC_MSG_SERVER_QEMU_AUDIO_END             0
518 #define VNC_MSG_SERVER_QEMU_AUDIO_BEGIN           1
519 #define VNC_MSG_SERVER_QEMU_AUDIO_DATA            2
520 
521 /* XVP server -> client status code */
522 #define VNC_XVP_CODE_FAIL 0
523 #define VNC_XVP_CODE_INIT 1
524 
525 /* XVP client -> server action request  */
526 #define VNC_XVP_ACTION_SHUTDOWN 2
527 #define VNC_XVP_ACTION_REBOOT 3
528 #define VNC_XVP_ACTION_RESET 4
529 
530 /* extended clipboard flags  */
531 #define VNC_CLIPBOARD_TEXT     (1 << 0)
532 #define VNC_CLIPBOARD_RTF      (1 << 1)
533 #define VNC_CLIPBOARD_HTML     (1 << 2)
534 #define VNC_CLIPBOARD_DIB      (1 << 3)
535 #define VNC_CLIPBOARD_FILES    (1 << 4)
536 #define VNC_CLIPBOARD_CAPS     (1 << 24)
537 #define VNC_CLIPBOARD_REQUEST  (1 << 25)
538 #define VNC_CLIPBOARD_PEEK     (1 << 26)
539 #define VNC_CLIPBOARD_NOTIFY   (1 << 27)
540 #define VNC_CLIPBOARD_PROVIDE  (1 << 28)
541 
542 /*****************************************************************************
543  *
544  * Internal APIs
545  *
546  *****************************************************************************/
547 
548 /* Event loop functions */
549 gboolean vnc_client_io(QIOChannel *ioc,
550                        GIOCondition condition,
551                        void *opaque);
552 
553 size_t vnc_client_read_buf(VncState *vs, uint8_t *data, size_t datalen);
554 size_t vnc_client_write_buf(VncState *vs, const uint8_t *data, size_t datalen);
555 
556 /* Protocol I/O functions */
557 void vnc_write(VncState *vs, const void *data, size_t len);
558 void vnc_write_u32(VncState *vs, uint32_t value);
559 void vnc_write_s32(VncState *vs, int32_t value);
560 void vnc_write_u16(VncState *vs, uint16_t value);
561 void vnc_write_u8(VncState *vs, uint8_t value);
562 void vnc_flush(VncState *vs);
563 void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting);
564 void vnc_disconnect_finish(VncState *vs);
565 void vnc_start_protocol(VncState *vs);
566 
567 
568 /* Buffer I/O functions */
569 uint32_t read_u32(uint8_t *data, size_t offset);
570 
571 /* Protocol stage functions */
572 void vnc_client_error(VncState *vs);
573 size_t vnc_client_io_error(VncState *vs, ssize_t ret, Error *err);
574 
575 void start_client_init(VncState *vs);
576 void start_auth_vnc(VncState *vs);
577 
578 
579 /* Misc helpers */
580 
vnc_has_feature(VncState * vs,int feature)581 static inline uint32_t vnc_has_feature(VncState *vs, int feature) {
582     return (vs->features & (1 << feature));
583 }
584 
vnc_set_feature(VncState * vs,enum VncFeatures feature)585 static inline void vnc_set_feature(VncState *vs, enum VncFeatures feature)
586 {
587     vs->features |= (1 << feature);
588 }
589 
590 /* Framebuffer */
591 void vnc_framebuffer_update(VncState *vs, int x, int y, int w, int h,
592                             int32_t encoding);
593 
594 /* server fb is in PIXMAN_x8r8g8b8 */
595 #define VNC_SERVER_FB_FORMAT PIXMAN_FORMAT(32, PIXMAN_TYPE_ARGB, 0, 8, 8, 8)
596 #define VNC_SERVER_FB_BITS   (PIXMAN_FORMAT_BPP(VNC_SERVER_FB_FORMAT))
597 #define VNC_SERVER_FB_BYTES  ((VNC_SERVER_FB_BITS+7)/8)
598 
599 void *vnc_server_fb_ptr(VncDisplay *vd, int x, int y);
600 int vnc_server_fb_stride(VncDisplay *vd);
601 
602 void vnc_convert_pixel(VncState *vs, uint8_t *buf, uint32_t v);
603 double vnc_update_freq(VncState *vs, int x, int y, int w, int h);
604 void vnc_sent_lossy_rect(VncState *vs, int x, int y, int w, int h);
605 
606 /* Encodings */
607 int vnc_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
608 
609 int vnc_raw_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
610 
611 int vnc_hextile_send_framebuffer_update(VncState *vs, int x,
612                                          int y, int w, int h);
613 void vnc_hextile_set_pixel_conversion(VncState *vs, int generic);
614 
615 void *vnc_zlib_zalloc(void *x, unsigned items, unsigned size);
616 void vnc_zlib_zfree(void *x, void *addr);
617 int vnc_zlib_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
618 void vnc_zlib_clear(VncState *vs);
619 
620 int vnc_tight_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
621 int vnc_tight_png_send_framebuffer_update(VncState *vs, int x, int y,
622                                           int w, int h);
623 void vnc_tight_clear(VncState *vs);
624 
625 int vnc_zrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
626 int vnc_zywrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h);
627 void vnc_zrle_clear(VncState *vs);
628 
629 /* vnc-clipboard.c */
630 void vnc_server_cut_text_caps(VncState *vs);
631 void vnc_client_cut_text(VncState *vs, size_t len, uint8_t *text);
632 void vnc_client_cut_text_ext(VncState *vs, int32_t len, uint32_t flags, uint8_t *data);
633 
634 #endif /* QEMU_VNC_H */
635