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vnc-enc-tight: fix off-by-one bug
[mirror_qemu.git] / ui / vnc-enc-tight.c
CommitLineData
380282b0
CC		 1/*
2 * QEMU VNC display driver: tight encoding
3 *
4 * From libvncserver/libvncserver/tight.c
5 * Copyright (C) 2000, 2001 Const Kaplinsky. All Rights Reserved.
6 * Copyright (C) 1999 AT&T Laboratories Cambridge. All Rights Reserved.
7 *
8 * Copyright (C) 2010 Corentin Chary <corentin.chary@gmail.com>
9 *
10 * Permission is hereby granted, free of charge, to any person obtaining a copy
11 * of this software and associated documentation files (the "Software"), to deal
12 * in the Software without restriction, including without limitation the rights
13 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
14 * copies of the Software, and to permit persons to whom the Software is
15 * furnished to do so, subject to the following conditions:
16 *
17 * The above copyright notice and this permission notice shall be included in
18 * all copies or substantial portions of the Software.
19 *
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
21 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
23 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
24 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
25 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
26 * THE SOFTWARE.
27 */
28
e16f4c87 29#include "qemu/osdep.h"
2f6f5c7a 30
f26e428d
RT		 31/* This needs to be before jpeglib.h line because of conflict with
32 INT32 definitions between jmorecfg.h (included by jpeglib.h) and
33 Win32 basetsd.h (included by windows.h). */
34#include "qemu-common.h"
35
efe556ad 36#ifdef CONFIG_VNC_PNG
2fb0c09f
SW		 37/* The following define is needed by pngconf.h. Otherwise it won't compile,
38 because setjmp.h was already included by qemu-common.h. */
39#define PNG_SKIP_SETJMP_CHECK
efe556ad
CC		 40#include <png.h>
41#endif
2f6f5c7a 42#ifdef CONFIG_VNC_JPEG
2f6f5c7a
CC		 43#include <jpeglib.h>
44#endif
45
1de7afc9 46#include "qemu/bswap.h"
7b1b5d19 47#include "qapi/qmp/qint.h"
380282b0 48#include "vnc.h"
245f7b51 49#include "vnc-enc-tight.h"
5136a052 50#include "vnc-palette.h"
380282b0
CC		 51
52/* Compression level stuff. The following array contains various
53 encoder parameters for each of 10 compression levels (0..9).
54 Last three parameters correspond to JPEG quality levels (0..9). */
55
56static const struct {
57 int max_rect_size, max_rect_width;
58 int mono_min_rect_size, gradient_min_rect_size;
59 int idx_zlib_level, mono_zlib_level, raw_zlib_level, gradient_zlib_level;
60 int gradient_threshold, gradient_threshold24;
61 int idx_max_colors_divisor;
62 int jpeg_quality, jpeg_threshold, jpeg_threshold24;
63} tight_conf[] = {
64 { 512, 32, 6, 65536, 0, 0, 0, 0, 0, 0, 4, 5, 10000, 23000 },
65 { 2048, 128, 6, 65536, 1, 1, 1, 0, 0, 0, 8, 10, 8000, 18000 },
66 { 6144, 256, 8, 65536, 3, 3, 2, 0, 0, 0, 24, 15, 6500, 15000 },
67 { 10240, 1024, 12, 65536, 5, 5, 3, 0, 0, 0, 32, 25, 5000, 12000 },
68 { 16384, 2048, 12, 65536, 6, 6, 4, 0, 0, 0, 32, 37, 4000, 10000 },
69 { 32768, 2048, 12, 4096, 7, 7, 5, 4, 150, 380, 32, 50, 3000, 8000 },
70 { 65536, 2048, 16, 4096, 7, 7, 6, 4, 170, 420, 48, 60, 2000, 5000 },
71 { 65536, 2048, 16, 4096, 8, 8, 7, 5, 180, 450, 64, 70, 1000, 2500 },
72 { 65536, 2048, 32, 8192, 9, 9, 8, 6, 190, 475, 64, 75, 500, 1200 },
73 { 65536, 2048, 32, 8192, 9, 9, 9, 6, 200, 500, 96, 80, 200, 500 }
74};
75
efe556ad
CC		 76
77static int tight_send_framebuffer_update(VncState *vs, int x, int y,
78 int w, int h);
79
ce702e93
CC		 80#ifdef CONFIG_VNC_JPEG
81static const struct {
82 double jpeg_freq_min; /* Don't send JPEG if the freq is bellow */
83 double jpeg_freq_threshold; /* Always send JPEG if the freq is above */
84 int jpeg_idx; /* Allow indexed JPEG */
85 int jpeg_full; /* Allow full color JPEG */
86} tight_jpeg_conf[] = {
8cb4a6b7
CC		 87 { 0, 8, 1, 1 },
88 { 0, 8, 1, 1 },
89 { 0, 8, 1, 1 },
90 { 0, 8, 1, 1 },
91 { 0, 10, 1, 1 },
92 { 0.1, 10, 1, 1 },
93 { 0.2, 10, 1, 1 },
94 { 0.3, 12, 0, 0 },
95 { 0.4, 14, 0, 0 },
96 { 0.5, 16, 0, 0 },
ce702e93
CC		 97};
98#endif
99
efe556ad 100#ifdef CONFIG_VNC_PNG
3941bf6f
CC		 101static const struct {
102 int png_zlib_level, png_filters;
103} tight_png_conf[] = {
104 { 0, PNG_NO_FILTERS },
105 { 1, PNG_NO_FILTERS },
106 { 2, PNG_NO_FILTERS },
107 { 3, PNG_NO_FILTERS },
108 { 4, PNG_NO_FILTERS },
109 { 5, PNG_ALL_FILTERS },
110 { 6, PNG_ALL_FILTERS },
111 { 7, PNG_ALL_FILTERS },
112 { 8, PNG_ALL_FILTERS },
113 { 9, PNG_ALL_FILTERS },
114};
115
efe556ad 116static int send_png_rect(VncState *vs, int x, int y, int w, int h,
5136a052 117 VncPalette *palette);
efe556ad
CC		 118
119static bool tight_can_send_png_rect(VncState *vs, int w, int h)
120{
d1af0e05 121 if (vs->tight.type != VNC_ENCODING_TIGHT_PNG) {
efe556ad
CC		 122 return false;
123 }
124
d39fa6d8 125 if (surface_bytes_per_pixel(vs->vd->ds) == 1 ||
9f64916d 126 vs->client_pf.bytes_per_pixel == 1) {
efe556ad
CC		 127 return false;
128 }
129
130 return true;
131}
132#endif
133
2f6f5c7a
CC		 134/*
135 * Code to guess if given rectangle is suitable for smooth image
136 * compression (by applying "gradient" filter or JPEG coder).
137 */
138
249cdb42 139static unsigned int
2f6f5c7a
CC		 140tight_detect_smooth_image24(VncState *vs, int w, int h)
141{
142 int off;
143 int x, y, d, dx;
249cdb42
BS		 144 unsigned int c;
145 unsigned int stats[256];
2f6f5c7a
CC		 146 int pixels = 0;
147 int pix, left[3];
249cdb42 148 unsigned int errors;
d1af0e05 149 unsigned char *buf = vs->tight.tight.buffer;
2f6f5c7a
CC		 150
151 /*
152 * If client is big-endian, color samples begin from the second
153 * byte (offset 1) of a 32-bit pixel value.
154 */
9f64916d 155 off = vs->client_be;
2f6f5c7a
CC		 156
157 memset(stats, 0, sizeof (stats));
158
159 for (y = 0, x = 0; y < h && x < w;) {
160 for (d = 0; d < h - y && d < w - x - VNC_TIGHT_DETECT_SUBROW_WIDTH;
161 d++) {
162 for (c = 0; c < 3; c++) {
163 left[c] = buf[((y+d)*w+x+d)*4+off+c] & 0xFF;
164 }
165 for (dx = 1; dx <= VNC_TIGHT_DETECT_SUBROW_WIDTH; dx++) {
166 for (c = 0; c < 3; c++) {
167 pix = buf[((y+d)*w+x+d+dx)*4+off+c] & 0xFF;
168 stats[abs(pix - left[c])]++;
169 left[c] = pix;
170 }
171 pixels++;
172 }
173 }
174 if (w > h) {
175 x += h;
176 y = 0;
177 } else {
178 x = 0;
179 y += w;
180 }
181 }
182
b5299153
GA		 183 if (pixels == 0) {
184 return 0;
185 }
186
2f6f5c7a
CC		 187 /* 95% smooth or more ... */
188 if (stats[0] * 33 / pixels >= 95) {
189 return 0;
190 }
191
192 errors = 0;
193 for (c = 1; c < 8; c++) {
194 errors += stats[c] * (c * c);
195 if (stats[c] == 0 || stats[c] > stats[c-1] * 2) {
196 return 0;
197 }
198 }
199 for (; c < 256; c++) {
200 errors += stats[c] * (c * c);
201 }
202 errors /= (pixels * 3 - stats[0]);
203
204 return errors;
205}
206
207#define DEFINE_DETECT_FUNCTION(bpp) \
208 \
249cdb42 209 static unsigned int \
2f6f5c7a
CC		 210 tight_detect_smooth_image##bpp(VncState *vs, int w, int h) { \
211 bool endian; \
212 uint##bpp##_t pix; \
213 int max[3], shift[3]; \
214 int x, y, d, dx; \
249cdb42
BS		 215 unsigned int c; \
216 unsigned int stats[256]; \
2f6f5c7a
CC		 217 int pixels = 0; \
218 int sample, sum, left[3]; \
249cdb42 219 unsigned int errors; \
d1af0e05 220 unsigned char *buf = vs->tight.tight.buffer; \
2f6f5c7a 221 \
77bfcf28 222 endian = 0; /* FIXME */ \
2f6f5c7a
CC		 223 \
224 \
9f64916d
GH		 225 max[0] = vs->client_pf.rmax; \
226 max[1] = vs->client_pf.gmax; \
227 max[2] = vs->client_pf.bmax; \
228 shift[0] = vs->client_pf.rshift; \
229 shift[1] = vs->client_pf.gshift; \
230 shift[2] = vs->client_pf.bshift; \
2f6f5c7a
CC		 231 \
232 memset(stats, 0, sizeof(stats)); \
233 \
234 y = 0, x = 0; \
235 while (y < h && x < w) { \
236 for (d = 0; d < h - y && \
237 d < w - x - VNC_TIGHT_DETECT_SUBROW_WIDTH; d++) { \
238 pix = ((uint##bpp##_t *)buf)[(y+d)*w+x+d]; \
239 if (endian) { \
ba5e7f82 240 pix = bswap##bpp(pix); \
2f6f5c7a
CC		 241 } \
242 for (c = 0; c < 3; c++) { \
243 left[c] = (int)(pix >> shift[c] & max[c]); \
244 } \
245 for (dx = 1; dx <= VNC_TIGHT_DETECT_SUBROW_WIDTH; \
246 dx++) { \
247 pix = ((uint##bpp##_t *)buf)[(y+d)*w+x+d+dx]; \
248 if (endian) { \
ba5e7f82 249 pix = bswap##bpp(pix); \
2f6f5c7a
CC		 250 } \
251 sum = 0; \
252 for (c = 0; c < 3; c++) { \
253 sample = (int)(pix >> shift[c] & max[c]); \
254 sum += abs(sample - left[c]); \
255 left[c] = sample; \
256 } \
257 if (sum > 255) { \
258 sum = 255; \
259 } \
260 stats[sum]++; \
261 pixels++; \
262 } \
263 } \
264 if (w > h) { \
265 x += h; \
266 y = 0; \
267 } else { \
268 x = 0; \
269 y += w; \
270 } \
271 } \
b5299153
GA		 272 if (pixels == 0) { \
273 return 0; \
274 } \
2f6f5c7a
CC		 275 if ((stats[0] + stats[1]) * 100 / pixels >= 90) { \
276 return 0; \
277 } \
278 \
279 errors = 0; \
280 for (c = 1; c < 8; c++) { \
281 errors += stats[c] * (c * c); \
282 if (stats[c] == 0 || stats[c] > stats[c-1] * 2) { \
283 return 0; \
284 } \
285 } \
286 for (; c < 256; c++) { \
287 errors += stats[c] * (c * c); \
288 } \
289 errors /= (pixels - stats[0]); \
290 \
291 return errors; \
292 }
293
294DEFINE_DETECT_FUNCTION(16)
295DEFINE_DETECT_FUNCTION(32)
296
297static int
298tight_detect_smooth_image(VncState *vs, int w, int h)
299{
249cdb42 300 unsigned int errors;
d1af0e05
CC		 301 int compression = vs->tight.compression;
302 int quality = vs->tight.quality;
2f6f5c7a 303
6f9c78c1
CC		 304 if (!vs->vd->lossy) {
305 return 0;
306 }
307
d39fa6d8 308 if (surface_bytes_per_pixel(vs->vd->ds) == 1 ||
9f64916d 309 vs->client_pf.bytes_per_pixel == 1 ||
2f6f5c7a
CC		 310 w < VNC_TIGHT_DETECT_MIN_WIDTH || h < VNC_TIGHT_DETECT_MIN_HEIGHT) {
311 return 0;
312 }
313
7bccf573 314 if (vs->tight.quality != (uint8_t)-1) {
2f6f5c7a
CC		 315 if (w * h < VNC_TIGHT_JPEG_MIN_RECT_SIZE) {
316 return 0;
317 }
318 } else {
319 if (w * h < tight_conf[compression].gradient_min_rect_size) {
320 return 0;
321 }
322 }
323
9f64916d 324 if (vs->client_pf.bytes_per_pixel == 4) {
d1af0e05 325 if (vs->tight.pixel24) {
2f6f5c7a 326 errors = tight_detect_smooth_image24(vs, w, h);
7bccf573 327 if (vs->tight.quality != (uint8_t)-1) {
2f6f5c7a
CC		 328 return (errors < tight_conf[quality].jpeg_threshold24);
329 }
330 return (errors < tight_conf[compression].gradient_threshold24);
331 } else {
332 errors = tight_detect_smooth_image32(vs, w, h);
333 }
334 } else {
335 errors = tight_detect_smooth_image16(vs, w, h);
336 }
2e7bcdb9 337 if (quality != (uint8_t)-1) {
2f6f5c7a
CC		 338 return (errors < tight_conf[quality].jpeg_threshold);
339 }
340 return (errors < tight_conf[compression].gradient_threshold);
341}
342
aa7d73fd
CC		 343/*
344 * Code to determine how many different colors used in rectangle.
345 */
aa7d73fd
CC		 346#define DEFINE_FILL_PALETTE_FUNCTION(bpp) \
347 \
348 static int \
349 tight_fill_palette##bpp(VncState *vs, int x, int y, \
350 int max, size_t count, \
351 uint32_t *bg, uint32_t *fg, \
095497ff 352 VncPalette *palette) { \
aa7d73fd
CC		 353 uint##bpp##_t *data; \
354 uint##bpp##_t c0, c1, ci; \
355 int i, n0, n1; \
356 \
d1af0e05 357 data = (uint##bpp##_t *)vs->tight.tight.buffer; \
aa7d73fd
CC		 358 \
359 c0 = data[0]; \
360 i = 1; \
361 while (i < count && data[i] == c0) \
362 i++; \
363 if (i >= count) { \
364 *bg = *fg = c0; \
365 return 1; \
366 } \
367 \
368 if (max < 2) { \
369 return 0; \
370 } \
371 \
372 n0 = i; \
373 c1 = data[i]; \
374 n1 = 0; \
375 for (i++; i < count; i++) { \
376 ci = data[i]; \
377 if (ci == c0) { \
378 n0++; \
379 } else if (ci == c1) { \
380 n1++; \
381 } else \
382 break; \
383 } \
384 if (i >= count) { \
385 if (n0 > n1) { \
386 *bg = (uint32_t)c0; \
387 *fg = (uint32_t)c1; \
388 } else { \
389 *bg = (uint32_t)c1; \
390 *fg = (uint32_t)c0; \
391 } \
392 return 2; \
393 } \
394 \
395 if (max == 2) { \
396 return 0; \
397 } \
398 \
095497ff
PL		 399 palette_init(palette, max, bpp); \
400 palette_put(palette, c0); \
401 palette_put(palette, c1); \
402 palette_put(palette, ci); \
aa7d73fd
CC		 403 \
404 for (i++; i < count; i++) { \
405 if (data[i] == ci) { \
406 continue; \
407 } else { \
5d8efe39 408 ci = data[i]; \
095497ff 409 if (!palette_put(palette, (uint32_t)ci)) { \
aa7d73fd
CC		 410 return 0; \
411 } \
aa7d73fd
CC		 412 } \
413 } \
414 \
095497ff 415 return palette_size(palette); \
aa7d73fd
CC		 416 }
417
418DEFINE_FILL_PALETTE_FUNCTION(8)
419DEFINE_FILL_PALETTE_FUNCTION(16)
420DEFINE_FILL_PALETTE_FUNCTION(32)
421
422static int tight_fill_palette(VncState *vs, int x, int y,
423 size_t count, uint32_t *bg, uint32_t *fg,
095497ff 424 VncPalette *palette)
aa7d73fd
CC		 425{
426 int max;
427
d1af0e05 428 max = count / tight_conf[vs->tight.compression].idx_max_colors_divisor;
aa7d73fd 429 if (max < 2 &&
d1af0e05 430 count >= tight_conf[vs->tight.compression].mono_min_rect_size) {
aa7d73fd
CC		 431 max = 2;
432 }
433 if (max >= 256) {
434 max = 256;
435 }
436
9f64916d 437 switch (vs->client_pf.bytes_per_pixel) {
aa7d73fd
CC		 438 case 4:
439 return tight_fill_palette32(vs, x, y, max, count, bg, fg, palette);
440 case 2:
441 return tight_fill_palette16(vs, x, y, max, count, bg, fg, palette);
442 default:
443 max = 2;
444 return tight_fill_palette8(vs, x, y, max, count, bg, fg, palette);
445 }
446 return 0;
447}
448
aa7d73fd
CC		 449/*
450 * Converting truecolor samples into palette indices.
451 */
452#define DEFINE_IDX_ENCODE_FUNCTION(bpp) \
453 \
454 static void \
455 tight_encode_indexed_rect##bpp(uint8_t *buf, int count, \
5136a052 456 VncPalette *palette) { \
aa7d73fd
CC		 457 uint##bpp##_t *src; \
458 uint##bpp##_t rgb; \
54d43eac 459 int i, rep; \
aa7d73fd
CC		 460 uint8_t idx; \
461 \
462 src = (uint##bpp##_t *) buf; \
463 \
3f7e51bc 464 for (i = 0; i < count; ) { \
efe556ad 465 \
aa7d73fd 466 rgb = *src++; \
3f7e51bc 467 i++; \
aa7d73fd 468 rep = 0; \
54d43eac
CC		 469 while (i < count && *src == rgb) { \
470 rep++, src++, i++; \
aa7d73fd 471 } \
5136a052
CC		 472 idx = palette_idx(palette, rgb); \
473 /* \
474 * Should never happen, but don't break everything \
475 * if it does, use the first color instead \
476 */ \
7bccf573 477 if (idx == (uint8_t)-1) { \
aa7d73fd 478 idx = 0; \
aa7d73fd
CC		 479 } \
480 while (rep >= 0) { \
481 *buf++ = idx; \
482 rep--; \
483 } \
484 } \
485 }
486
487DEFINE_IDX_ENCODE_FUNCTION(16)
488DEFINE_IDX_ENCODE_FUNCTION(32)
489
490#define DEFINE_MONO_ENCODE_FUNCTION(bpp) \
491 \
492 static void \
493 tight_encode_mono_rect##bpp(uint8_t *buf, int w, int h, \
494 uint##bpp##_t bg, uint##bpp##_t fg) { \
495 uint##bpp##_t *ptr; \
496 unsigned int value, mask; \
497 int aligned_width; \
498 int x, y, bg_bits; \
499 \
500 ptr = (uint##bpp##_t *) buf; \
501 aligned_width = w - w % 8; \
502 \
503 for (y = 0; y < h; y++) { \
504 for (x = 0; x < aligned_width; x += 8) { \
505 for (bg_bits = 0; bg_bits < 8; bg_bits++) { \
506 if (*ptr++ != bg) { \
507 break; \
508 } \
509 } \
510 if (bg_bits == 8) { \
511 *buf++ = 0; \
512 continue; \
513 } \
514 mask = 0x80 >> bg_bits; \
515 value = mask; \
516 for (bg_bits++; bg_bits < 8; bg_bits++) { \
517 mask >>= 1; \
518 if (*ptr++ != bg) { \
519 value |= mask; \
520 } \
521 } \
522 *buf++ = (uint8_t)value; \
523 } \
524 \
525 mask = 0x80; \
526 value = 0; \
527 if (x >= w) { \
528 continue; \
529 } \
530 \
531 for (; x < w; x++) { \
532 if (*ptr++ != bg) { \
533 value |= mask; \
534 } \
535 mask >>= 1; \
536 } \
537 *buf++ = (uint8_t)value; \
538 } \
539 }
540
541DEFINE_MONO_ENCODE_FUNCTION(8)
542DEFINE_MONO_ENCODE_FUNCTION(16)
543DEFINE_MONO_ENCODE_FUNCTION(32)
544
2f6f5c7a
CC		 545/*
546 * ``Gradient'' filter for 24-bit color samples.
547 * Should be called only when redMax, greenMax and blueMax are 255.
548 * Color components assumed to be byte-aligned.
549 */
550
551static void
552tight_filter_gradient24(VncState *vs, uint8_t *buf, int w, int h)
553{
554 uint32_t *buf32;
555 uint32_t pix32;
556 int shift[3];
557 int *prev;
558 int here[3], upper[3], left[3], upperleft[3];
559 int prediction;
560 int x, y, c;
561
562 buf32 = (uint32_t *)buf;
d1af0e05 563 memset(vs->tight.gradient.buffer, 0, w * 3 * sizeof(int));
2f6f5c7a 564
77bfcf28 565 if (1 /* FIXME */) {
9f64916d
GH		 566 shift[0] = vs->client_pf.rshift;
567 shift[1] = vs->client_pf.gshift;
568 shift[2] = vs->client_pf.bshift;
2f6f5c7a 569 } else {
9f64916d
GH		 570 shift[0] = 24 - vs->client_pf.rshift;
571 shift[1] = 24 - vs->client_pf.gshift;
572 shift[2] = 24 - vs->client_pf.bshift;
2f6f5c7a
CC		 573 }
574
575 for (y = 0; y < h; y++) {
576 for (c = 0; c < 3; c++) {
577 upper[c] = 0;
578 here[c] = 0;
579 }
d1af0e05 580 prev = (int *)vs->tight.gradient.buffer;
2f6f5c7a
CC		 581 for (x = 0; x < w; x++) {
582 pix32 = *buf32++;
583 for (c = 0; c < 3; c++) {
584 upperleft[c] = upper[c];
585 left[c] = here[c];
586 upper[c] = *prev;
587 here[c] = (int)(pix32 >> shift[c] & 0xFF);
588 *prev++ = here[c];
589
590 prediction = left[c] + upper[c] - upperleft[c];
591 if (prediction < 0) {
592 prediction = 0;
593 } else if (prediction > 0xFF) {
594 prediction = 0xFF;
595 }
596 *buf++ = (char)(here[c] - prediction);
597 }
598 }
599 }
600}
601
602
603/*
604 * ``Gradient'' filter for other color depths.
605 */
606
607#define DEFINE_GRADIENT_FILTER_FUNCTION(bpp) \
608 \
609 static void \
610 tight_filter_gradient##bpp(VncState *vs, uint##bpp##_t *buf, \
611 int w, int h) { \
612 uint##bpp##_t pix, diff; \
613 bool endian; \
614 int *prev; \
615 int max[3], shift[3]; \
616 int here[3], upper[3], left[3], upperleft[3]; \
617 int prediction; \
618 int x, y, c; \
619 \
d1af0e05 620 memset (vs->tight.gradient.buffer, 0, w * 3 * sizeof(int)); \
2f6f5c7a 621 \
77bfcf28 622 endian = 0; /* FIXME */ \
2f6f5c7a 623 \
9f64916d
GH		 624 max[0] = vs->client_pf.rmax; \
625 max[1] = vs->client_pf.gmax; \
626 max[2] = vs->client_pf.bmax; \
627 shift[0] = vs->client_pf.rshift; \
628 shift[1] = vs->client_pf.gshift; \
629 shift[2] = vs->client_pf.bshift; \
2f6f5c7a
CC		 630 \
631 for (y = 0; y < h; y++) { \
632 for (c = 0; c < 3; c++) { \
633 upper[c] = 0; \
634 here[c] = 0; \
635 } \
d1af0e05 636 prev = (int *)vs->tight.gradient.buffer; \
2f6f5c7a
CC		 637 for (x = 0; x < w; x++) { \
638 pix = *buf; \
639 if (endian) { \
ba5e7f82 640 pix = bswap##bpp(pix); \
2f6f5c7a
CC		 641 } \
642 diff = 0; \
643 for (c = 0; c < 3; c++) { \
644 upperleft[c] = upper[c]; \
645 left[c] = here[c]; \
646 upper[c] = *prev; \
647 here[c] = (int)(pix >> shift[c] & max[c]); \
648 *prev++ = here[c]; \
649 \
650 prediction = left[c] + upper[c] - upperleft[c]; \
651 if (prediction < 0) { \
652 prediction = 0; \
653 } else if (prediction > max[c]) { \
654 prediction = max[c]; \
655 } \
656 diff |= ((here[c] - prediction) & max[c]) \
657 << shift[c]; \
658 } \
659 if (endian) { \
ba5e7f82 660 diff = bswap##bpp(diff); \
2f6f5c7a
CC		 661 } \
662 *buf++ = diff; \
663 } \
664 } \
665 }
666
667DEFINE_GRADIENT_FILTER_FUNCTION(16)
668DEFINE_GRADIENT_FILTER_FUNCTION(32)
669
b4bea3f2
CC		 670/*
671 * Check if a rectangle is all of the same color. If needSameColor is
672 * set to non-zero, then also check that its color equals to the
b0cd712c 673 * *colorPtr value. The result is 1 if the test is successful, and in
b4bea3f2
CC		 674 * that case new color will be stored in *colorPtr.
675 */
676
94362682
GH		 677static bool
678check_solid_tile32(VncState *vs, int x, int y, int w, int h,
679 uint32_t *color, bool samecolor)
680{
681 VncDisplay *vd = vs->vd;
682 uint32_t *fbptr;
683 uint32_t c;
684 int dx, dy;
685
686 fbptr = vnc_server_fb_ptr(vd, x, y);
687
688 c = *fbptr;
689 if (samecolor && (uint32_t)c != *color) {
690 return false;
b4bea3f2
CC		 691 }
692
94362682
GH		 693 for (dy = 0; dy < h; dy++) {
694 for (dx = 0; dx < w; dx++) {
695 if (c != fbptr[dx]) {
696 return false;
697 }
698 }
699 fbptr = (uint32_t *)
700 ((uint8_t *)fbptr + vnc_server_fb_stride(vd));
701 }
702
703 *color = (uint32_t)c;
704 return true;
705}
b4bea3f2
CC		 706
707static bool check_solid_tile(VncState *vs, int x, int y, int w, int h,
708 uint32_t* color, bool samecolor)
709{
9f64916d 710 switch (VNC_SERVER_FB_BYTES) {
b4bea3f2
CC		 711 case 4:
712 return check_solid_tile32(vs, x, y, w, h, color, samecolor);
b4bea3f2
CC		 713 }
714}
715
716static void find_best_solid_area(VncState *vs, int x, int y, int w, int h,
717 uint32_t color, int *w_ptr, int *h_ptr)
718{
719 int dx, dy, dw, dh;
720 int w_prev;
721 int w_best = 0, h_best = 0;
722
723 w_prev = w;
724
725 for (dy = y; dy < y + h; dy += VNC_TIGHT_MAX_SPLIT_TILE_SIZE) {
726
727 dh = MIN(VNC_TIGHT_MAX_SPLIT_TILE_SIZE, y + h - dy);
728 dw = MIN(VNC_TIGHT_MAX_SPLIT_TILE_SIZE, w_prev);
729
730 if (!check_solid_tile(vs, x, dy, dw, dh, &color, true)) {
731 break;
732 }
733
734 for (dx = x + dw; dx < x + w_prev;) {
735 dw = MIN(VNC_TIGHT_MAX_SPLIT_TILE_SIZE, x + w_prev - dx);
736
737 if (!check_solid_tile(vs, dx, dy, dw, dh, &color, true)) {
738 break;
739 }
740 dx += dw;
741 }
742
743 w_prev = dx - x;
744 if (w_prev * (dy + dh - y) > w_best * h_best) {
745 w_best = w_prev;
746 h_best = dy + dh - y;
747 }
748 }
749
750 *w_ptr = w_best;
751 *h_ptr = h_best;
752}
753
754static void extend_solid_area(VncState *vs, int x, int y, int w, int h,
755 uint32_t color, int *x_ptr, int *y_ptr,
756 int *w_ptr, int *h_ptr)
757{
758 int cx, cy;
759
760 /* Try to extend the area upwards. */
761 for ( cy = *y_ptr - 1;
762 cy >= y && check_solid_tile(vs, *x_ptr, cy, *w_ptr, 1, &color, true);
763 cy-- );
764 *h_ptr += *y_ptr - (cy + 1);
765 *y_ptr = cy + 1;
766
767 /* ... downwards. */
768 for ( cy = *y_ptr + *h_ptr;
769 cy < y + h &&
770 check_solid_tile(vs, *x_ptr, cy, *w_ptr, 1, &color, true);
771 cy++ );
772 *h_ptr += cy - (*y_ptr + *h_ptr);
773
774 /* ... to the left. */
775 for ( cx = *x_ptr - 1;
776 cx >= x && check_solid_tile(vs, cx, *y_ptr, 1, *h_ptr, &color, true);
777 cx-- );
778 *w_ptr += *x_ptr - (cx + 1);
779 *x_ptr = cx + 1;
780
781 /* ... to the right. */
782 for ( cx = *x_ptr + *w_ptr;
783 cx < x + w &&
784 check_solid_tile(vs, cx, *y_ptr, 1, *h_ptr, &color, true);
785 cx++ );
786 *w_ptr += cx - (*x_ptr + *w_ptr);
787}
788
380282b0
CC		 789static int tight_init_stream(VncState *vs, int stream_id,
790 int level, int strategy)
791{
d1af0e05 792 z_streamp zstream = &vs->tight.stream[stream_id];
380282b0
CC		 793
794 if (zstream->opaque == NULL) {
795 int err;
796
797 VNC_DEBUG("VNC: TIGHT: initializing zlib stream %d\n", stream_id);
798 VNC_DEBUG("VNC: TIGHT: opaque = %p | vs = %p\n", zstream->opaque, vs);
799 zstream->zalloc = vnc_zlib_zalloc;
800 zstream->zfree = vnc_zlib_zfree;
801
802 err = deflateInit2(zstream, level, Z_DEFLATED, MAX_WBITS,
803 MAX_MEM_LEVEL, strategy);
804
805 if (err != Z_OK) {
806 fprintf(stderr, "VNC: error initializing zlib\n");
807 return -1;
808 }
809
d1af0e05 810 vs->tight.levels[stream_id] = level;
380282b0
CC		 811 zstream->opaque = vs;
812 }
813
d1af0e05 814 if (vs->tight.levels[stream_id] != level) {
380282b0
CC		 815 if (deflateParams(zstream, level, strategy) != Z_OK) {
816 return -1;
817 }
d1af0e05 818 vs->tight.levels[stream_id] = level;
380282b0
CC		 819 }
820 return 0;
821}
822
823static void tight_send_compact_size(VncState *vs, size_t len)
824{
825 int lpc = 0;
826 int bytes = 0;
827 char buf[3] = {0, 0, 0};
828
829 buf[bytes++] = len & 0x7F;
830 if (len > 0x7F) {
831 buf[bytes-1] |= 0x80;
832 buf[bytes++] = (len >> 7) & 0x7F;
833 if (len > 0x3FFF) {
834 buf[bytes-1] |= 0x80;
835 buf[bytes++] = (len >> 14) & 0xFF;
836 }
837 }
b4bea3f2 838 for (lpc = 0; lpc < bytes; lpc++) {
380282b0
CC		 839 vnc_write_u8(vs, buf[lpc]);
840 }
841}
842
843static int tight_compress_data(VncState *vs, int stream_id, size_t bytes,
844 int level, int strategy)
845{
d1af0e05 846 z_streamp zstream = &vs->tight.stream[stream_id];
380282b0
CC		 847 int previous_out;
848
849 if (bytes < VNC_TIGHT_MIN_TO_COMPRESS) {
d1af0e05 850 vnc_write(vs, vs->tight.tight.buffer, vs->tight.tight.offset);
380282b0
CC		 851 return bytes;
852 }
853
854 if (tight_init_stream(vs, stream_id, level, strategy)) {
855 return -1;
856 }
857
858 /* reserve memory in output buffer */
d1af0e05 859 buffer_reserve(&vs->tight.zlib, bytes + 64);
380282b0
CC		 860
861 /* set pointers */
d1af0e05
CC		 862 zstream->next_in = vs->tight.tight.buffer;
863 zstream->avail_in = vs->tight.tight.offset;
864 zstream->next_out = vs->tight.zlib.buffer + vs->tight.zlib.offset;
865 zstream->avail_out = vs->tight.zlib.capacity - vs->tight.zlib.offset;
2caa9e9d 866 previous_out = zstream->avail_out;
380282b0 867 zstream->data_type = Z_BINARY;
380282b0
CC		 868
869 /* start encoding */
870 if (deflate(zstream, Z_SYNC_FLUSH) != Z_OK) {
871 fprintf(stderr, "VNC: error during tight compression\n");
872 return -1;
873 }
874
d1af0e05 875 vs->tight.zlib.offset = vs->tight.zlib.capacity - zstream->avail_out;
2caa9e9d
MT		 876 /* ...how much data has actually been produced by deflate() */
877 bytes = previous_out - zstream->avail_out;
380282b0
CC		 878
879 tight_send_compact_size(vs, bytes);
d1af0e05 880 vnc_write(vs, vs->tight.zlib.buffer, bytes);
380282b0 881
d1af0e05 882 buffer_reset(&vs->tight.zlib);
380282b0
CC		 883
884 return bytes;
885}
886
887/*
888 * Subencoding implementations.
889 */
aa7d73fd 890static void tight_pack24(VncState *vs, uint8_t *buf, size_t count, size_t *ret)
380282b0 891{
380282b0
CC		 892 uint32_t *buf32;
893 uint32_t pix;
894 int rshift, gshift, bshift;
895
380282b0
CC		 896 buf32 = (uint32_t *)buf;
897
77bfcf28 898 if (1 /* FIXME */) {
9f64916d
GH		 899 rshift = vs->client_pf.rshift;
900 gshift = vs->client_pf.gshift;
901 bshift = vs->client_pf.bshift;
380282b0 902 } else {
9f64916d
GH		 903 rshift = 24 - vs->client_pf.rshift;
904 gshift = 24 - vs->client_pf.gshift;
905 bshift = 24 - vs->client_pf.bshift;
380282b0
CC		 906 }
907
aa7d73fd
CC		 908 if (ret) {
909 *ret = count * 3;
910 }
380282b0
CC		 911
912 while (count--) {
913 pix = *buf32++;
914 *buf++ = (char)(pix >> rshift);
915 *buf++ = (char)(pix >> gshift);
916 *buf++ = (char)(pix >> bshift);
917 }
918}
919
efe556ad 920static int send_full_color_rect(VncState *vs, int x, int y, int w, int h)
380282b0
CC		 921{
922 int stream = 0;
2116eff9 923 ssize_t bytes;
380282b0 924
efe556ad
CC		 925#ifdef CONFIG_VNC_PNG
926 if (tight_can_send_png_rect(vs, w, h)) {
927 return send_png_rect(vs, x, y, w, h, NULL);
928 }
929#endif
930
380282b0
CC		 931 vnc_write_u8(vs, stream << 4); /* no flushing, no filter */
932
d1af0e05
CC		 933 if (vs->tight.pixel24) {
934 tight_pack24(vs, vs->tight.tight.buffer, w * h, &vs->tight.tight.offset);
380282b0
CC		 935 bytes = 3;
936 } else {
9f64916d 937 bytes = vs->client_pf.bytes_per_pixel;
380282b0
CC		 938 }
939
940 bytes = tight_compress_data(vs, stream, w * h * bytes,
d1af0e05 941 tight_conf[vs->tight.compression].raw_zlib_level,
380282b0
CC		 942 Z_DEFAULT_STRATEGY);
943
944 return (bytes >= 0);
945}
946
b4bea3f2
CC		 947static int send_solid_rect(VncState *vs)
948{
949 size_t bytes;
950
951 vnc_write_u8(vs, VNC_TIGHT_FILL << 4); /* no flushing, no filter */
952
d1af0e05
CC		 953 if (vs->tight.pixel24) {
954 tight_pack24(vs, vs->tight.tight.buffer, 1, &vs->tight.tight.offset);
b4bea3f2
CC		 955 bytes = 3;
956 } else {
9f64916d 957 bytes = vs->client_pf.bytes_per_pixel;
b4bea3f2
CC		 958 }
959
d1af0e05 960 vnc_write(vs, vs->tight.tight.buffer, bytes);
b4bea3f2
CC		 961 return 1;
962}
963
efe556ad
CC		 964static int send_mono_rect(VncState *vs, int x, int y,
965 int w, int h, uint32_t bg, uint32_t fg)
aa7d73fd 966{
2116eff9 967 ssize_t bytes;
aa7d73fd 968 int stream = 1;
d1af0e05 969 int level = tight_conf[vs->tight.compression].mono_zlib_level;
aa7d73fd 970
efe556ad
CC		 971#ifdef CONFIG_VNC_PNG
972 if (tight_can_send_png_rect(vs, w, h)) {
973 int ret;
9f64916d 974 int bpp = vs->client_pf.bytes_per_pixel * 8;
5136a052 975 VncPalette *palette = palette_new(2, bpp);
efe556ad 976
5136a052
CC		 977 palette_put(palette, bg);
978 palette_put(palette, fg);
efe556ad 979 ret = send_png_rect(vs, x, y, w, h, palette);
5136a052 980 palette_destroy(palette);
efe556ad
CC		 981 return ret;
982 }
983#endif
984
aa7d73fd
CC		 985 bytes = ((w + 7) / 8) * h;
986
987 vnc_write_u8(vs, (stream | VNC_TIGHT_EXPLICIT_FILTER) << 4);
988 vnc_write_u8(vs, VNC_TIGHT_FILTER_PALETTE);
989 vnc_write_u8(vs, 1);
990
9f64916d 991 switch (vs->client_pf.bytes_per_pixel) {
aa7d73fd
CC		 992 case 4:
993 {
994 uint32_t buf[2] = {bg, fg};
995 size_t ret = sizeof (buf);
996
d1af0e05 997 if (vs->tight.pixel24) {
aa7d73fd
CC		 998 tight_pack24(vs, (unsigned char*)buf, 2, &ret);
999 }
1000 vnc_write(vs, buf, ret);
1001
d1af0e05 1002 tight_encode_mono_rect32(vs->tight.tight.buffer, w, h, bg, fg);
aa7d73fd
CC		 1003 break;
1004 }
1005 case 2:
1006 vnc_write(vs, &bg, 2);
1007 vnc_write(vs, &fg, 2);
d1af0e05 1008 tight_encode_mono_rect16(vs->tight.tight.buffer, w, h, bg, fg);
aa7d73fd
CC		 1009 break;
1010 default:
1011 vnc_write_u8(vs, bg);
1012 vnc_write_u8(vs, fg);
d1af0e05 1013 tight_encode_mono_rect8(vs->tight.tight.buffer, w, h, bg, fg);
aa7d73fd
CC		 1014 break;
1015 }
d1af0e05 1016 vs->tight.tight.offset = bytes;
aa7d73fd
CC		 1017
1018 bytes = tight_compress_data(vs, stream, bytes, level, Z_DEFAULT_STRATEGY);
1019 return (bytes >= 0);
1020}
1021
1022struct palette_cb_priv {
1023 VncState *vs;
1024 uint8_t *header;
efe556ad
CC		 1025#ifdef CONFIG_VNC_PNG
1026 png_colorp png_palette;
1027#endif
aa7d73fd
CC		 1028};
1029
5136a052 1030static void write_palette(int idx, uint32_t color, void *opaque)
aa7d73fd
CC		 1031{
1032 struct palette_cb_priv *priv = opaque;
1033 VncState *vs = priv->vs;
9f64916d 1034 uint32_t bytes = vs->client_pf.bytes_per_pixel;
aa7d73fd
CC		 1035
1036 if (bytes == 4) {
aa7d73fd
CC		 1037 ((uint32_t*)priv->header)[idx] = color;
1038 } else {
aa7d73fd
CC		 1039 ((uint16_t*)priv->header)[idx] = color;
1040 }
1041}
1042
efe556ad 1043static bool send_gradient_rect(VncState *vs, int x, int y, int w, int h)
2f6f5c7a
CC		 1044{
1045 int stream = 3;
d1af0e05 1046 int level = tight_conf[vs->tight.compression].gradient_zlib_level;
2116eff9 1047 ssize_t bytes;
2f6f5c7a 1048
9f64916d 1049 if (vs->client_pf.bytes_per_pixel == 1) {
efe556ad 1050 return send_full_color_rect(vs, x, y, w, h);
9f64916d 1051 }
2f6f5c7a
CC		 1052
1053 vnc_write_u8(vs, (stream | VNC_TIGHT_EXPLICIT_FILTER) << 4);
1054 vnc_write_u8(vs, VNC_TIGHT_FILTER_GRADIENT);
1055
d1af0e05 1056 buffer_reserve(&vs->tight.gradient, w * 3 * sizeof (int));
2f6f5c7a 1057
d1af0e05
CC		 1058 if (vs->tight.pixel24) {
1059 tight_filter_gradient24(vs, vs->tight.tight.buffer, w, h);
2f6f5c7a 1060 bytes = 3;
9f64916d 1061 } else if (vs->client_pf.bytes_per_pixel == 4) {
d1af0e05 1062 tight_filter_gradient32(vs, (uint32_t *)vs->tight.tight.buffer, w, h);
2f6f5c7a
CC		 1063 bytes = 4;
1064 } else {
d1af0e05 1065 tight_filter_gradient16(vs, (uint16_t *)vs->tight.tight.buffer, w, h);
2f6f5c7a
CC		 1066 bytes = 2;
1067 }
1068
d1af0e05 1069 buffer_reset(&vs->tight.gradient);
2f6f5c7a
CC		 1070
1071 bytes = w * h * bytes;
d1af0e05 1072 vs->tight.tight.offset = bytes;
2f6f5c7a
CC		 1073
1074 bytes = tight_compress_data(vs, stream, bytes,
1075 level, Z_FILTERED);
1076 return (bytes >= 0);
1077}
1078
efe556ad 1079static int send_palette_rect(VncState *vs, int x, int y,
5136a052 1080 int w, int h, VncPalette *palette)
aa7d73fd
CC		 1081{
1082 int stream = 2;
d1af0e05 1083 int level = tight_conf[vs->tight.compression].idx_zlib_level;
aa7d73fd 1084 int colors;
2116eff9 1085 ssize_t bytes;
aa7d73fd 1086
efe556ad
CC		 1087#ifdef CONFIG_VNC_PNG
1088 if (tight_can_send_png_rect(vs, w, h)) {
1089 return send_png_rect(vs, x, y, w, h, palette);
1090 }
1091#endif
1092
5136a052 1093 colors = palette_size(palette);
aa7d73fd
CC		 1094
1095 vnc_write_u8(vs, (stream | VNC_TIGHT_EXPLICIT_FILTER) << 4);
1096 vnc_write_u8(vs, VNC_TIGHT_FILTER_PALETTE);
1097 vnc_write_u8(vs, colors - 1);
1098
9f64916d 1099 switch (vs->client_pf.bytes_per_pixel) {
aa7d73fd
CC		 1100 case 4:
1101 {
1102 size_t old_offset, offset;
5136a052 1103 uint32_t header[palette_size(palette)];
aa7d73fd
CC		 1104 struct palette_cb_priv priv = { vs, (uint8_t *)header };
1105
1106 old_offset = vs->output.offset;
5136a052 1107 palette_iter(palette, write_palette, &priv);
aa7d73fd
CC		 1108 vnc_write(vs, header, sizeof(header));
1109
d1af0e05 1110 if (vs->tight.pixel24) {
aa7d73fd
CC		 1111 tight_pack24(vs, vs->output.buffer + old_offset, colors, &offset);
1112 vs->output.offset = old_offset + offset;
1113 }
1114
d1af0e05 1115 tight_encode_indexed_rect32(vs->tight.tight.buffer, w * h, palette);
aa7d73fd
CC		 1116 break;
1117 }
1118 case 2:
1119 {
5136a052 1120 uint16_t header[palette_size(palette)];
aa7d73fd
CC		 1121 struct palette_cb_priv priv = { vs, (uint8_t *)header };
1122
5136a052 1123 palette_iter(palette, write_palette, &priv);
aa7d73fd 1124 vnc_write(vs, header, sizeof(header));
d1af0e05 1125 tight_encode_indexed_rect16(vs->tight.tight.buffer, w * h, palette);
aa7d73fd
CC		 1126 break;
1127 }
1128 default:
1129 return -1; /* No palette for 8bits colors */
1130 break;
1131 }
1132 bytes = w * h;
d1af0e05 1133 vs->tight.tight.offset = bytes;
aa7d73fd
CC		 1134
1135 bytes = tight_compress_data(vs, stream, bytes,
1136 level, Z_DEFAULT_STRATEGY);
1137 return (bytes >= 0);
1138}
1139
efe556ad
CC		 1140/*
1141 * JPEG compression stuff.
1142 */
1143#ifdef CONFIG_VNC_JPEG
2f6f5c7a
CC		 1144/*
1145 * Destination manager implementation for JPEG library.
1146 */
1147
1148/* This is called once per encoding */
1149static void jpeg_init_destination(j_compress_ptr cinfo)
1150{
1151 VncState *vs = cinfo->client_data;
d1af0e05 1152 Buffer *buffer = &vs->tight.jpeg;
2f6f5c7a
CC		 1153
1154 cinfo->dest->next_output_byte = (JOCTET *)buffer->buffer + buffer->offset;
1155 cinfo->dest->free_in_buffer = (size_t)(buffer->capacity - buffer->offset);
1156}
1157
1158/* This is called when we ran out of buffer (shouldn't happen!) */
1159static boolean jpeg_empty_output_buffer(j_compress_ptr cinfo)
1160{
1161 VncState *vs = cinfo->client_data;
d1af0e05 1162 Buffer *buffer = &vs->tight.jpeg;
2f6f5c7a
CC		 1163
1164 buffer->offset = buffer->capacity;
1165 buffer_reserve(buffer, 2048);
1166 jpeg_init_destination(cinfo);
1167 return TRUE;
1168}
1169
1170/* This is called when we are done processing data */
1171static void jpeg_term_destination(j_compress_ptr cinfo)
1172{
1173 VncState *vs = cinfo->client_data;
d1af0e05 1174 Buffer *buffer = &vs->tight.jpeg;
2f6f5c7a
CC		 1175
1176 buffer->offset = buffer->capacity - cinfo->dest->free_in_buffer;
1177}
1178
1179static int send_jpeg_rect(VncState *vs, int x, int y, int w, int h, int quality)
1180{
1181 struct jpeg_compress_struct cinfo;
1182 struct jpeg_error_mgr jerr;
1183 struct jpeg_destination_mgr manager;
47683d66 1184 pixman_image_t *linebuf;
2f6f5c7a
CC		 1185 JSAMPROW row[1];
1186 uint8_t *buf;
1187 int dy;
1188
d39fa6d8 1189 if (surface_bytes_per_pixel(vs->vd->ds) == 1) {
efe556ad 1190 return send_full_color_rect(vs, x, y, w, h);
d39fa6d8 1191 }
2f6f5c7a 1192
d1af0e05 1193 buffer_reserve(&vs->tight.jpeg, 2048);
2f6f5c7a
CC		 1194
1195 cinfo.err = jpeg_std_error(&jerr);
1196 jpeg_create_compress(&cinfo);
1197
1198 cinfo.client_data = vs;
1199 cinfo.image_width = w;
1200 cinfo.image_height = h;
1201 cinfo.input_components = 3;
1202 cinfo.in_color_space = JCS_RGB;
1203
1204 jpeg_set_defaults(&cinfo);
1205 jpeg_set_quality(&cinfo, quality, true);
1206
1207 manager.init_destination = jpeg_init_destination;
1208 manager.empty_output_buffer = jpeg_empty_output_buffer;
1209 manager.term_destination = jpeg_term_destination;
1210 cinfo.dest = &manager;
1211
1212 jpeg_start_compress(&cinfo, true);
1213
47683d66
GH		 1214 linebuf = qemu_pixman_linebuf_create(PIXMAN_BE_r8g8b8, w);
1215 buf = (uint8_t *)pixman_image_get_data(linebuf);
d9c18c24 1216 row[0] = buf;
2f6f5c7a 1217 for (dy = 0; dy < h; dy++) {
bc210eb1 1218 qemu_pixman_linebuf_fill(linebuf, vs->vd->server, w, x, y + dy);
2f6f5c7a
CC		 1219 jpeg_write_scanlines(&cinfo, row, 1);
1220 }
47683d66 1221 qemu_pixman_image_unref(linebuf);
2f6f5c7a
CC		 1222
1223 jpeg_finish_compress(&cinfo);
1224 jpeg_destroy_compress(&cinfo);
1225
1226 vnc_write_u8(vs, VNC_TIGHT_JPEG << 4);
1227
d1af0e05
CC		 1228 tight_send_compact_size(vs, vs->tight.jpeg.offset);
1229 vnc_write(vs, vs->tight.jpeg.buffer, vs->tight.jpeg.offset);
1230 buffer_reset(&vs->tight.jpeg);
2f6f5c7a
CC		 1231
1232 return 1;
1233}
1234#endif /* CONFIG_VNC_JPEG */
1235
efe556ad
CC		 1236/*
1237 * PNG compression stuff.
1238 */
1239#ifdef CONFIG_VNC_PNG
5136a052 1240static void write_png_palette(int idx, uint32_t pix, void *opaque)
efe556ad
CC		 1241{
1242 struct palette_cb_priv *priv = opaque;
1243 VncState *vs = priv->vs;
efe556ad 1244 png_colorp color = &priv->png_palette[idx];
efe556ad 1245
d1af0e05 1246 if (vs->tight.pixel24)
efe556ad 1247 {
9f64916d
GH		 1248 color->red = (pix >> vs->client_pf.rshift) & vs->client_pf.rmax;
1249 color->green = (pix >> vs->client_pf.gshift) & vs->client_pf.gmax;
1250 color->blue = (pix >> vs->client_pf.bshift) & vs->client_pf.bmax;
efe556ad
CC		 1251 }
1252 else
1253 {
1254 int red, green, blue;
1255
9f64916d
GH		 1256 red = (pix >> vs->client_pf.rshift) & vs->client_pf.rmax;
1257 green = (pix >> vs->client_pf.gshift) & vs->client_pf.gmax;
1258 blue = (pix >> vs->client_pf.bshift) & vs->client_pf.bmax;
1259 color->red = ((red * 255 + vs->client_pf.rmax / 2) /
1260 vs->client_pf.rmax);
1261 color->green = ((green * 255 + vs->client_pf.gmax / 2) /
1262 vs->client_pf.gmax);
1263 color->blue = ((blue * 255 + vs->client_pf.bmax / 2) /
1264 vs->client_pf.bmax);
efe556ad
CC		 1265 }
1266}
1267
1268static void png_write_data(png_structp png_ptr, png_bytep data,
1269 png_size_t length)
1270{
1271 VncState *vs = png_get_io_ptr(png_ptr);
1272
d1af0e05
CC		 1273 buffer_reserve(&vs->tight.png, vs->tight.png.offset + length);
1274 memcpy(vs->tight.png.buffer + vs->tight.png.offset, data, length);
efe556ad 1275
d1af0e05 1276 vs->tight.png.offset += length;
efe556ad
CC		 1277}
1278
1279static void png_flush_data(png_structp png_ptr)
1280{
1281}
1282
1283static void *vnc_png_malloc(png_structp png_ptr, png_size_t size)
1284{
7267c094 1285 return g_malloc(size);
efe556ad
CC		 1286}
1287
1288static void vnc_png_free(png_structp png_ptr, png_voidp ptr)
1289{
7267c094 1290 g_free(ptr);
efe556ad
CC		 1291}
1292
1293static int send_png_rect(VncState *vs, int x, int y, int w, int h,
5136a052 1294 VncPalette *palette)
efe556ad
CC		 1295{
1296 png_byte color_type;
1297 png_structp png_ptr;
1298 png_infop info_ptr;
1299 png_colorp png_palette = NULL;
47683d66 1300 pixman_image_t *linebuf;
d1af0e05
CC		 1301 int level = tight_png_conf[vs->tight.compression].png_zlib_level;
1302 int filters = tight_png_conf[vs->tight.compression].png_filters;
efe556ad
CC		 1303 uint8_t *buf;
1304 int dy;
1305
1306 png_ptr = png_create_write_struct_2(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL,
1307 NULL, vnc_png_malloc, vnc_png_free);
1308
1309 if (png_ptr == NULL)
1310 return -1;
1311
1312 info_ptr = png_create_info_struct(png_ptr);
1313
1314 if (info_ptr == NULL) {
1315 png_destroy_write_struct(&png_ptr, NULL);
1316 return -1;
1317 }
1318
1319 png_set_write_fn(png_ptr, (void *) vs, png_write_data, png_flush_data);
1320 png_set_compression_level(png_ptr, level);
3941bf6f 1321 png_set_filter(png_ptr, PNG_FILTER_TYPE_DEFAULT, filters);
efe556ad
CC		 1322
1323 if (palette) {
1324 color_type = PNG_COLOR_TYPE_PALETTE;
1325 } else {
1326 color_type = PNG_COLOR_TYPE_RGB;
1327 }
1328
1329 png_set_IHDR(png_ptr, info_ptr, w, h,
1330 8, color_type, PNG_INTERLACE_NONE,
1331 PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
1332
1333 if (color_type == PNG_COLOR_TYPE_PALETTE) {
1334 struct palette_cb_priv priv;
1335
1336 png_palette = png_malloc(png_ptr, sizeof(*png_palette) *
5136a052 1337 palette_size(palette));
efe556ad
CC		 1338
1339 priv.vs = vs;
1340 priv.png_palette = png_palette;
5136a052 1341 palette_iter(palette, write_png_palette, &priv);
efe556ad 1342
5136a052 1343 png_set_PLTE(png_ptr, info_ptr, png_palette, palette_size(palette));
efe556ad 1344
9f64916d 1345 if (vs->client_pf.bytes_per_pixel == 4) {
d1af0e05 1346 tight_encode_indexed_rect32(vs->tight.tight.buffer, w * h, palette);
efe556ad 1347 } else {
d1af0e05 1348 tight_encode_indexed_rect16(vs->tight.tight.buffer, w * h, palette);
efe556ad
CC		 1349 }
1350 }
1351
1352 png_write_info(png_ptr, info_ptr);
1353
d1af0e05 1354 buffer_reserve(&vs->tight.png, 2048);
47683d66
GH		 1355 linebuf = qemu_pixman_linebuf_create(PIXMAN_BE_r8g8b8, w);
1356 buf = (uint8_t *)pixman_image_get_data(linebuf);
efe556ad
CC		 1357 for (dy = 0; dy < h; dy++)
1358 {
1359 if (color_type == PNG_COLOR_TYPE_PALETTE) {
d1af0e05 1360 memcpy(buf, vs->tight.tight.buffer + (dy * w), w);
efe556ad 1361 } else {
bc210eb1 1362 qemu_pixman_linebuf_fill(linebuf, vs->vd->server, w, x, y + dy);
efe556ad
CC		 1363 }
1364 png_write_row(png_ptr, buf);
1365 }
47683d66 1366 qemu_pixman_image_unref(linebuf);
efe556ad
CC		 1367
1368 png_write_end(png_ptr, NULL);
1369
1370 if (color_type == PNG_COLOR_TYPE_PALETTE) {
1371 png_free(png_ptr, png_palette);
1372 }
1373
1374 png_destroy_write_struct(&png_ptr, &info_ptr);
1375
1376 vnc_write_u8(vs, VNC_TIGHT_PNG << 4);
1377
d1af0e05
CC		 1378 tight_send_compact_size(vs, vs->tight.png.offset);
1379 vnc_write(vs, vs->tight.png.buffer, vs->tight.png.offset);
1380 buffer_reset(&vs->tight.png);
efe556ad
CC		 1381 return 1;
1382}
1383#endif /* CONFIG_VNC_PNG */
1384
380282b0
CC		 1385static void vnc_tight_start(VncState *vs)
1386{
d1af0e05 1387 buffer_reset(&vs->tight.tight);
380282b0
CC		 1388
1389 // make the output buffer be the zlib buffer, so we can compress it later
d1af0e05
CC		 1390 vs->tight.tmp = vs->output;
1391 vs->output = vs->tight.tight;
380282b0
CC		 1392}
1393
1394static void vnc_tight_stop(VncState *vs)
1395{
1396 // switch back to normal output/zlib buffers
d1af0e05
CC		 1397 vs->tight.tight = vs->output;
1398 vs->output = vs->tight.tmp;
380282b0
CC		 1399}
1400
03817eb8
CC		 1401static int send_sub_rect_nojpeg(VncState *vs, int x, int y, int w, int h,
1402 int bg, int fg, int colors, VncPalette *palette)
380282b0 1403{
03817eb8 1404 int ret;
380282b0 1405
03817eb8
CC		 1406 if (colors == 0) {
1407 if (tight_detect_smooth_image(vs, w, h)) {
1408 ret = send_gradient_rect(vs, x, y, w, h);
1409 } else {
1410 ret = send_full_color_rect(vs, x, y, w, h);
1411 }
1412 } else if (colors == 1) {
1413 ret = send_solid_rect(vs);
1414 } else if (colors == 2) {
1415 ret = send_mono_rect(vs, x, y, w, h, bg, fg);
1416 } else if (colors <= 256) {
1417 ret = send_palette_rect(vs, x, y, w, h, palette);
d167f9bc
BS		 1418 } else {
1419 ret = 0;
03817eb8
CC		 1420 }
1421 return ret;
1422}
380282b0 1423
03817eb8
CC		 1424#ifdef CONFIG_VNC_JPEG
1425static int send_sub_rect_jpeg(VncState *vs, int x, int y, int w, int h,
1426 int bg, int fg, int colors,
ce702e93 1427 VncPalette *palette, bool force)
03817eb8
CC		 1428{
1429 int ret;
aa7d73fd
CC		 1430
1431 if (colors == 0) {
ce702e93
CC		 1432 if (force || (tight_jpeg_conf[vs->tight.quality].jpeg_full &&
1433 tight_detect_smooth_image(vs, w, h))) {
03817eb8 1434 int quality = tight_conf[vs->tight.quality].jpeg_quality;
2f6f5c7a 1435
03817eb8 1436 ret = send_jpeg_rect(vs, x, y, w, h, quality);
2f6f5c7a 1437 } else {
efe556ad 1438 ret = send_full_color_rect(vs, x, y, w, h);
2f6f5c7a 1439 }
aa7d73fd
CC		 1440 } else if (colors == 1) {
1441 ret = send_solid_rect(vs);
1442 } else if (colors == 2) {
efe556ad 1443 ret = send_mono_rect(vs, x, y, w, h, bg, fg);
aa7d73fd 1444 } else if (colors <= 256) {
ce702e93
CC		 1445 if (force || (colors > 96 &&
1446 tight_jpeg_conf[vs->tight.quality].jpeg_idx &&
1447 tight_detect_smooth_image(vs, w, h))) {
d1af0e05 1448 int quality = tight_conf[vs->tight.quality].jpeg_quality;
2f6f5c7a
CC		 1449
1450 ret = send_jpeg_rect(vs, x, y, w, h, quality);
1451 } else {
efe556ad 1452 ret = send_palette_rect(vs, x, y, w, h, palette);
2f6f5c7a 1453 }
ad7ee4ad
BS		 1454 } else {
1455 ret = 0;
03817eb8
CC		 1456 }
1457 return ret;
1458}
2f6f5c7a 1459#endif
03817eb8 1460
095497ff
PL		 1461static __thread VncPalette color_count_palette;
1462
03817eb8
CC		 1463static int send_sub_rect(VncState *vs, int x, int y, int w, int h)
1464{
095497ff 1465 VncPalette *palette = &color_count_palette;
03817eb8
CC		 1466 uint32_t bg = 0, fg = 0;
1467 int colors;
1468 int ret = 0;
cf76a1ce 1469#ifdef CONFIG_VNC_JPEG
ce702e93
CC		 1470 bool force_jpeg = false;
1471 bool allow_jpeg = true;
cf76a1ce 1472#endif
03817eb8
CC		 1473
1474 vnc_framebuffer_update(vs, x, y, w, h, vs->tight.type);
1475
1476 vnc_tight_start(vs);
1477 vnc_raw_send_framebuffer_update(vs, x, y, w, h);
1478 vnc_tight_stop(vs);
1479
ce702e93 1480#ifdef CONFIG_VNC_JPEG
80e0c8c3 1481 if (!vs->vd->non_adaptive && vs->tight.quality != (uint8_t)-1) {
ce702e93
CC		 1482 double freq = vnc_update_freq(vs, x, y, w, h);
1483
1484 if (freq < tight_jpeg_conf[vs->tight.quality].jpeg_freq_min) {
1485 allow_jpeg = false;
1486 }
1487 if (freq >= tight_jpeg_conf[vs->tight.quality].jpeg_freq_threshold) {
1488 force_jpeg = true;
1489 vnc_sent_lossy_rect(vs, x, y, w, h);
1490 }
1491 }
1492#endif
1493
095497ff 1494 colors = tight_fill_palette(vs, x, y, w * h, &bg, &fg, palette);
03817eb8
CC		 1495
1496#ifdef CONFIG_VNC_JPEG
ce702e93
CC		 1497 if (allow_jpeg && vs->tight.quality != (uint8_t)-1) {
1498 ret = send_sub_rect_jpeg(vs, x, y, w, h, bg, fg, colors, palette,
1499 force_jpeg);
03817eb8
CC		 1500 } else {
1501 ret = send_sub_rect_nojpeg(vs, x, y, w, h, bg, fg, colors, palette);
aa7d73fd 1502 }
03817eb8
CC		 1503#else
1504 ret = send_sub_rect_nojpeg(vs, x, y, w, h, bg, fg, colors, palette);
1505#endif
1506
aa7d73fd 1507 return ret;
380282b0
CC		 1508}
1509
b4bea3f2
CC		 1510static int send_sub_rect_solid(VncState *vs, int x, int y, int w, int h)
1511{
d1af0e05 1512 vnc_framebuffer_update(vs, x, y, w, h, vs->tight.type);
b4bea3f2
CC		 1513
1514 vnc_tight_start(vs);
1515 vnc_raw_send_framebuffer_update(vs, x, y, w, h);
1516 vnc_tight_stop(vs);
1517
1518 return send_solid_rect(vs);
1519}
1520
ce702e93
CC		 1521static int send_rect_simple(VncState *vs, int x, int y, int w, int h,
1522 bool split)
380282b0
CC		 1523{
1524 int max_size, max_width;
1525 int max_sub_width, max_sub_height;
1526 int dx, dy;
1527 int rw, rh;
1528 int n = 0;
1529
d1af0e05
CC		 1530 max_size = tight_conf[vs->tight.compression].max_rect_size;
1531 max_width = tight_conf[vs->tight.compression].max_rect_width;
380282b0 1532
ce702e93 1533 if (split && (w > max_width || w * h > max_size)) {
380282b0
CC		 1534 max_sub_width = (w > max_width) ? max_width : w;
1535 max_sub_height = max_size / max_sub_width;
1536
1537 for (dy = 0; dy < h; dy += max_sub_height) {
1538 for (dx = 0; dx < w; dx += max_width) {
1539 rw = MIN(max_sub_width, w - dx);
1540 rh = MIN(max_sub_height, h - dy);
1541 n += send_sub_rect(vs, x+dx, y+dy, rw, rh);
1542 }
1543 }
1544 } else {
1545 n += send_sub_rect(vs, x, y, w, h);
1546 }
1547
1548 return n;
1549}
1550
b4bea3f2
CC		 1551static int find_large_solid_color_rect(VncState *vs, int x, int y,
1552 int w, int h, int max_rows)
1553{
1554 int dx, dy, dw, dh;
1555 int n = 0;
1556
1557 /* Try to find large solid-color areas and send them separately. */
1558
1559 for (dy = y; dy < y + h; dy += VNC_TIGHT_MAX_SPLIT_TILE_SIZE) {
1560
1561 /* If a rectangle becomes too large, send its upper part now. */
1562
1563 if (dy - y >= max_rows) {
ce702e93 1564 n += send_rect_simple(vs, x, y, w, max_rows, true);
b4bea3f2
CC		 1565 y += max_rows;
1566 h -= max_rows;
1567 }
1568
1569 dh = MIN(VNC_TIGHT_MAX_SPLIT_TILE_SIZE, (y + h - dy));
1570
1571 for (dx = x; dx < x + w; dx += VNC_TIGHT_MAX_SPLIT_TILE_SIZE) {
1572 uint32_t color_value;
1573 int x_best, y_best, w_best, h_best;
1574
1575 dw = MIN(VNC_TIGHT_MAX_SPLIT_TILE_SIZE, (x + w - dx));
1576
1577 if (!check_solid_tile(vs, dx, dy, dw, dh, &color_value, false)) {
1578 continue ;
1579 }
1580
1581 /* Get dimensions of solid-color area. */
1582
1583 find_best_solid_area(vs, dx, dy, w - (dx - x), h - (dy - y),
1584 color_value, &w_best, &h_best);
1585
1586 /* Make sure a solid rectangle is large enough
1587 (or the whole rectangle is of the same color). */
1588
1589 if (w_best * h_best != w * h &&
1590 w_best * h_best < VNC_TIGHT_MIN_SOLID_SUBRECT_SIZE) {
1591 continue;
1592 }
1593
1594 /* Try to extend solid rectangle to maximum size. */
1595
1596 x_best = dx; y_best = dy;
1597 extend_solid_area(vs, x, y, w, h, color_value,
1598 &x_best, &y_best, &w_best, &h_best);
1599
1600 /* Send rectangles at top and left to solid-color area. */
1601
1602 if (y_best != y) {
ce702e93 1603 n += send_rect_simple(vs, x, y, w, y_best-y, true);
b4bea3f2
CC		 1604 }
1605 if (x_best != x) {
efe556ad
CC		 1606 n += tight_send_framebuffer_update(vs, x, y_best,
1607 x_best-x, h_best);
b4bea3f2
CC		 1608 }
1609
1610 /* Send solid-color rectangle. */
1611 n += send_sub_rect_solid(vs, x_best, y_best, w_best, h_best);
1612
1613 /* Send remaining rectangles (at right and bottom). */
1614
1615 if (x_best + w_best != x + w) {
efe556ad
CC		 1616 n += tight_send_framebuffer_update(vs, x_best+w_best,
1617 y_best,
1618 w-(x_best-x)-w_best,
1619 h_best);
b4bea3f2
CC		 1620 }
1621 if (y_best + h_best != y + h) {
efe556ad
CC		 1622 n += tight_send_framebuffer_update(vs, x, y_best+h_best,
1623 w, h-(y_best-y)-h_best);
b4bea3f2
CC		 1624 }
1625
1626 /* Return after all recursive calls are done. */
1627 return n;
1628 }
1629 }
ce702e93 1630 return n + send_rect_simple(vs, x, y, w, h, true);
b4bea3f2
CC		 1631}
1632
efe556ad
CC		 1633static int tight_send_framebuffer_update(VncState *vs, int x, int y,
1634 int w, int h)
380282b0 1635{
b4bea3f2
CC		 1636 int max_rows;
1637
9f64916d
GH		 1638 if (vs->client_pf.bytes_per_pixel == 4 && vs->client_pf.rmax == 0xFF &&
1639 vs->client_pf.bmax == 0xFF && vs->client_pf.gmax == 0xFF) {
d1af0e05 1640 vs->tight.pixel24 = true;
380282b0 1641 } else {
d1af0e05 1642 vs->tight.pixel24 = false;
380282b0
CC		 1643 }
1644
cf76a1ce 1645#ifdef CONFIG_VNC_JPEG
368d2588 1646 if (vs->tight.quality != (uint8_t)-1) {
ce702e93
CC		 1647 double freq = vnc_update_freq(vs, x, y, w, h);
1648
1649 if (freq > tight_jpeg_conf[vs->tight.quality].jpeg_freq_threshold) {
1650 return send_rect_simple(vs, x, y, w, h, false);
1651 }
1652 }
cf76a1ce 1653#endif
ce702e93
CC		 1654
1655 if (w * h < VNC_TIGHT_MIN_SPLIT_RECT_SIZE) {
1656 return send_rect_simple(vs, x, y, w, h, true);
1657 }
b4bea3f2
CC		 1658
1659 /* Calculate maximum number of rows in one non-solid rectangle. */
1660
d1af0e05
CC		 1661 max_rows = tight_conf[vs->tight.compression].max_rect_size;
1662 max_rows /= MIN(tight_conf[vs->tight.compression].max_rect_width, w);
b4bea3f2
CC		 1663
1664 return find_large_solid_color_rect(vs, x, y, w, h, max_rows);
380282b0
CC		 1665}
1666
efe556ad
CC		 1667int vnc_tight_send_framebuffer_update(VncState *vs, int x, int y,
1668 int w, int h)
1669{
d1af0e05 1670 vs->tight.type = VNC_ENCODING_TIGHT;
efe556ad
CC		 1671 return tight_send_framebuffer_update(vs, x, y, w, h);
1672}
1673
1674int vnc_tight_png_send_framebuffer_update(VncState *vs, int x, int y,
1675 int w, int h)
1676{
d1af0e05 1677 vs->tight.type = VNC_ENCODING_TIGHT_PNG;
efe556ad
CC		 1678 return tight_send_framebuffer_update(vs, x, y, w, h);
1679}
1680
380282b0
CC		 1681void vnc_tight_clear(VncState *vs)
1682{
1683 int i;
d1af0e05
CC		 1684 for (i=0; i<ARRAY_SIZE(vs->tight.stream); i++) {
1685 if (vs->tight.stream[i].opaque) {
1686 deflateEnd(&vs->tight.stream[i]);
380282b0
CC		 1687 }
1688 }
1689
d1af0e05
CC		 1690 buffer_free(&vs->tight.tight);
1691 buffer_free(&vs->tight.zlib);
1692 buffer_free(&vs->tight.gradient);
2f6f5c7a 1693#ifdef CONFIG_VNC_JPEG
d1af0e05 1694 buffer_free(&vs->tight.jpeg);
2f6f5c7a 1695#endif
b5469b11
CC		 1696#ifdef CONFIG_VNC_PNG
1697 buffer_free(&vs->tight.png);
1698#endif
380282b0 1699}
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