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1.1 root 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 <[email protected]>
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:
29: #include "config-host.h"
30:
1.1.1.4 ! root 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:
1.1 root 36: #ifdef CONFIG_VNC_PNG
1.1.1.4 ! root 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
1.1 root 40: #include <png.h>
41: #endif
42: #ifdef CONFIG_VNC_JPEG
43: #include <stdio.h>
44: #include <jpeglib.h>
45: #endif
46:
47: #include "bswap.h"
48: #include "qint.h"
49: #include "vnc.h"
50: #include "vnc-enc-tight.h"
51: #include "vnc-palette.h"
52:
53: /* Compression level stuff. The following array contains various
54: encoder parameters for each of 10 compression levels (0..9).
55: Last three parameters correspond to JPEG quality levels (0..9). */
56:
57: static const struct {
58: int max_rect_size, max_rect_width;
59: int mono_min_rect_size, gradient_min_rect_size;
60: int idx_zlib_level, mono_zlib_level, raw_zlib_level, gradient_zlib_level;
61: int gradient_threshold, gradient_threshold24;
62: int idx_max_colors_divisor;
63: int jpeg_quality, jpeg_threshold, jpeg_threshold24;
64: } tight_conf[] = {
65: { 512, 32, 6, 65536, 0, 0, 0, 0, 0, 0, 4, 5, 10000, 23000 },
66: { 2048, 128, 6, 65536, 1, 1, 1, 0, 0, 0, 8, 10, 8000, 18000 },
67: { 6144, 256, 8, 65536, 3, 3, 2, 0, 0, 0, 24, 15, 6500, 15000 },
68: { 10240, 1024, 12, 65536, 5, 5, 3, 0, 0, 0, 32, 25, 5000, 12000 },
69: { 16384, 2048, 12, 65536, 6, 6, 4, 0, 0, 0, 32, 37, 4000, 10000 },
70: { 32768, 2048, 12, 4096, 7, 7, 5, 4, 150, 380, 32, 50, 3000, 8000 },
71: { 65536, 2048, 16, 4096, 7, 7, 6, 4, 170, 420, 48, 60, 2000, 5000 },
72: { 65536, 2048, 16, 4096, 8, 8, 7, 5, 180, 450, 64, 70, 1000, 2500 },
73: { 65536, 2048, 32, 8192, 9, 9, 8, 6, 190, 475, 64, 75, 500, 1200 },
74: { 65536, 2048, 32, 8192, 9, 9, 9, 6, 200, 500, 96, 80, 200, 500 }
75: };
76:
77:
78: static int tight_send_framebuffer_update(VncState *vs, int x, int y,
79: int w, int h);
80:
1.1.1.4 ! root 81: #ifdef CONFIG_VNC_JPEG
! 82: static const struct {
! 83: double jpeg_freq_min; /* Don't send JPEG if the freq is bellow */
! 84: double jpeg_freq_threshold; /* Always send JPEG if the freq is above */
! 85: int jpeg_idx; /* Allow indexed JPEG */
! 86: int jpeg_full; /* Allow full color JPEG */
! 87: } tight_jpeg_conf[] = {
! 88: { 0, 8, 1, 1 },
! 89: { 0, 8, 1, 1 },
! 90: { 0, 8, 1, 1 },
! 91: { 0, 8, 1, 1 },
! 92: { 0, 10, 1, 1 },
! 93: { 0.1, 10, 1, 1 },
! 94: { 0.2, 10, 1, 1 },
! 95: { 0.3, 12, 0, 0 },
! 96: { 0.4, 14, 0, 0 },
! 97: { 0.5, 16, 0, 0 },
! 98: };
! 99: #endif
! 100:
1.1 root 101: #ifdef CONFIG_VNC_PNG
102: static const struct {
103: int png_zlib_level, png_filters;
104: } tight_png_conf[] = {
105: { 0, PNG_NO_FILTERS },
106: { 1, PNG_NO_FILTERS },
107: { 2, PNG_NO_FILTERS },
108: { 3, PNG_NO_FILTERS },
109: { 4, PNG_NO_FILTERS },
110: { 5, PNG_ALL_FILTERS },
111: { 6, PNG_ALL_FILTERS },
112: { 7, PNG_ALL_FILTERS },
113: { 8, PNG_ALL_FILTERS },
114: { 9, PNG_ALL_FILTERS },
115: };
116:
117: static int send_png_rect(VncState *vs, int x, int y, int w, int h,
118: VncPalette *palette);
119:
120: static bool tight_can_send_png_rect(VncState *vs, int w, int h)
121: {
122: if (vs->tight.type != VNC_ENCODING_TIGHT_PNG) {
123: return false;
124: }
125:
126: if (ds_get_bytes_per_pixel(vs->ds) == 1 ||
127: vs->clientds.pf.bytes_per_pixel == 1) {
128: return false;
129: }
130:
131: return true;
132: }
133: #endif
134:
135: /*
136: * Code to guess if given rectangle is suitable for smooth image
137: * compression (by applying "gradient" filter or JPEG coder).
138: */
139:
1.1.1.2 root 140: static unsigned int
1.1 root 141: tight_detect_smooth_image24(VncState *vs, int w, int h)
142: {
143: int off;
144: int x, y, d, dx;
1.1.1.2 root 145: unsigned int c;
146: unsigned int stats[256];
1.1 root 147: int pixels = 0;
148: int pix, left[3];
1.1.1.2 root 149: unsigned int errors;
1.1 root 150: unsigned char *buf = vs->tight.tight.buffer;
151:
152: /*
153: * If client is big-endian, color samples begin from the second
154: * byte (offset 1) of a 32-bit pixel value.
155: */
156: off = !!(vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG);
157:
158: memset(stats, 0, sizeof (stats));
159:
160: for (y = 0, x = 0; y < h && x < w;) {
161: for (d = 0; d < h - y && d < w - x - VNC_TIGHT_DETECT_SUBROW_WIDTH;
162: d++) {
163: for (c = 0; c < 3; c++) {
164: left[c] = buf[((y+d)*w+x+d)*4+off+c] & 0xFF;
165: }
166: for (dx = 1; dx <= VNC_TIGHT_DETECT_SUBROW_WIDTH; dx++) {
167: for (c = 0; c < 3; c++) {
168: pix = buf[((y+d)*w+x+d+dx)*4+off+c] & 0xFF;
169: stats[abs(pix - left[c])]++;
170: left[c] = pix;
171: }
172: pixels++;
173: }
174: }
175: if (w > h) {
176: x += h;
177: y = 0;
178: } else {
179: x = 0;
180: y += w;
181: }
182: }
183:
184: /* 95% smooth or more ... */
185: if (stats[0] * 33 / pixels >= 95) {
186: return 0;
187: }
188:
189: errors = 0;
190: for (c = 1; c < 8; c++) {
191: errors += stats[c] * (c * c);
192: if (stats[c] == 0 || stats[c] > stats[c-1] * 2) {
193: return 0;
194: }
195: }
196: for (; c < 256; c++) {
197: errors += stats[c] * (c * c);
198: }
199: errors /= (pixels * 3 - stats[0]);
200:
201: return errors;
202: }
203:
204: #define DEFINE_DETECT_FUNCTION(bpp) \
205: \
1.1.1.2 root 206: static unsigned int \
1.1 root 207: tight_detect_smooth_image##bpp(VncState *vs, int w, int h) { \
208: bool endian; \
209: uint##bpp##_t pix; \
210: int max[3], shift[3]; \
211: int x, y, d, dx; \
1.1.1.2 root 212: unsigned int c; \
213: unsigned int stats[256]; \
1.1 root 214: int pixels = 0; \
215: int sample, sum, left[3]; \
1.1.1.2 root 216: unsigned int errors; \
1.1 root 217: unsigned char *buf = vs->tight.tight.buffer; \
218: \
219: endian = ((vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG) != \
220: (vs->ds->surface->flags & QEMU_BIG_ENDIAN_FLAG)); \
221: \
222: \
223: max[0] = vs->clientds.pf.rmax; \
224: max[1] = vs->clientds.pf.gmax; \
225: max[2] = vs->clientds.pf.bmax; \
226: shift[0] = vs->clientds.pf.rshift; \
227: shift[1] = vs->clientds.pf.gshift; \
228: shift[2] = vs->clientds.pf.bshift; \
229: \
230: memset(stats, 0, sizeof(stats)); \
231: \
232: y = 0, x = 0; \
233: while (y < h && x < w) { \
234: for (d = 0; d < h - y && \
235: d < w - x - VNC_TIGHT_DETECT_SUBROW_WIDTH; d++) { \
236: pix = ((uint##bpp##_t *)buf)[(y+d)*w+x+d]; \
237: if (endian) { \
1.1.1.2 root 238: pix = bswap##bpp(pix); \
1.1 root 239: } \
240: for (c = 0; c < 3; c++) { \
241: left[c] = (int)(pix >> shift[c] & max[c]); \
242: } \
243: for (dx = 1; dx <= VNC_TIGHT_DETECT_SUBROW_WIDTH; \
244: dx++) { \
245: pix = ((uint##bpp##_t *)buf)[(y+d)*w+x+d+dx]; \
246: if (endian) { \
1.1.1.2 root 247: pix = bswap##bpp(pix); \
1.1 root 248: } \
249: sum = 0; \
250: for (c = 0; c < 3; c++) { \
251: sample = (int)(pix >> shift[c] & max[c]); \
252: sum += abs(sample - left[c]); \
253: left[c] = sample; \
254: } \
255: if (sum > 255) { \
256: sum = 255; \
257: } \
258: stats[sum]++; \
259: pixels++; \
260: } \
261: } \
262: if (w > h) { \
263: x += h; \
264: y = 0; \
265: } else { \
266: x = 0; \
267: y += w; \
268: } \
269: } \
270: \
271: if ((stats[0] + stats[1]) * 100 / pixels >= 90) { \
272: return 0; \
273: } \
274: \
275: errors = 0; \
276: for (c = 1; c < 8; c++) { \
277: errors += stats[c] * (c * c); \
278: if (stats[c] == 0 || stats[c] > stats[c-1] * 2) { \
279: return 0; \
280: } \
281: } \
282: for (; c < 256; c++) { \
283: errors += stats[c] * (c * c); \
284: } \
285: errors /= (pixels - stats[0]); \
286: \
287: return errors; \
288: }
289:
290: DEFINE_DETECT_FUNCTION(16)
291: DEFINE_DETECT_FUNCTION(32)
292:
293: static int
294: tight_detect_smooth_image(VncState *vs, int w, int h)
295: {
1.1.1.2 root 296: unsigned int errors;
1.1 root 297: int compression = vs->tight.compression;
298: int quality = vs->tight.quality;
299:
300: if (!vs->vd->lossy) {
301: return 0;
302: }
303:
304: if (ds_get_bytes_per_pixel(vs->ds) == 1 ||
305: vs->clientds.pf.bytes_per_pixel == 1 ||
306: w < VNC_TIGHT_DETECT_MIN_WIDTH || h < VNC_TIGHT_DETECT_MIN_HEIGHT) {
307: return 0;
308: }
309:
1.1.1.2 root 310: if (vs->tight.quality != (uint8_t)-1) {
1.1 root 311: if (w * h < VNC_TIGHT_JPEG_MIN_RECT_SIZE) {
312: return 0;
313: }
314: } else {
315: if (w * h < tight_conf[compression].gradient_min_rect_size) {
316: return 0;
317: }
318: }
319:
320: if (vs->clientds.pf.bytes_per_pixel == 4) {
321: if (vs->tight.pixel24) {
322: errors = tight_detect_smooth_image24(vs, w, h);
1.1.1.2 root 323: if (vs->tight.quality != (uint8_t)-1) {
1.1 root 324: return (errors < tight_conf[quality].jpeg_threshold24);
325: }
326: return (errors < tight_conf[compression].gradient_threshold24);
327: } else {
328: errors = tight_detect_smooth_image32(vs, w, h);
329: }
330: } else {
331: errors = tight_detect_smooth_image16(vs, w, h);
332: }
333: if (quality != -1) {
334: return (errors < tight_conf[quality].jpeg_threshold);
335: }
336: return (errors < tight_conf[compression].gradient_threshold);
337: }
338:
339: /*
340: * Code to determine how many different colors used in rectangle.
341: */
342: #define DEFINE_FILL_PALETTE_FUNCTION(bpp) \
343: \
344: static int \
345: tight_fill_palette##bpp(VncState *vs, int x, int y, \
346: int max, size_t count, \
347: uint32_t *bg, uint32_t *fg, \
348: VncPalette **palette) { \
349: uint##bpp##_t *data; \
350: uint##bpp##_t c0, c1, ci; \
351: int i, n0, n1; \
352: \
353: data = (uint##bpp##_t *)vs->tight.tight.buffer; \
354: \
355: c0 = data[0]; \
356: i = 1; \
357: while (i < count && data[i] == c0) \
358: i++; \
359: if (i >= count) { \
360: *bg = *fg = c0; \
361: return 1; \
362: } \
363: \
364: if (max < 2) { \
365: return 0; \
366: } \
367: \
368: n0 = i; \
369: c1 = data[i]; \
370: n1 = 0; \
371: for (i++; i < count; i++) { \
372: ci = data[i]; \
373: if (ci == c0) { \
374: n0++; \
375: } else if (ci == c1) { \
376: n1++; \
377: } else \
378: break; \
379: } \
380: if (i >= count) { \
381: if (n0 > n1) { \
382: *bg = (uint32_t)c0; \
383: *fg = (uint32_t)c1; \
384: } else { \
385: *bg = (uint32_t)c1; \
386: *fg = (uint32_t)c0; \
387: } \
388: return 2; \
389: } \
390: \
391: if (max == 2) { \
392: return 0; \
393: } \
394: \
395: *palette = palette_new(max, bpp); \
396: palette_put(*palette, c0); \
397: palette_put(*palette, c1); \
398: palette_put(*palette, ci); \
399: \
400: for (i++; i < count; i++) { \
401: if (data[i] == ci) { \
402: continue; \
403: } else { \
404: ci = data[i]; \
405: if (!palette_put(*palette, (uint32_t)ci)) { \
406: return 0; \
407: } \
408: } \
409: } \
410: \
411: return palette_size(*palette); \
412: }
413:
414: DEFINE_FILL_PALETTE_FUNCTION(8)
415: DEFINE_FILL_PALETTE_FUNCTION(16)
416: DEFINE_FILL_PALETTE_FUNCTION(32)
417:
418: static int tight_fill_palette(VncState *vs, int x, int y,
419: size_t count, uint32_t *bg, uint32_t *fg,
420: VncPalette **palette)
421: {
422: int max;
423:
424: max = count / tight_conf[vs->tight.compression].idx_max_colors_divisor;
425: if (max < 2 &&
426: count >= tight_conf[vs->tight.compression].mono_min_rect_size) {
427: max = 2;
428: }
429: if (max >= 256) {
430: max = 256;
431: }
432:
433: switch(vs->clientds.pf.bytes_per_pixel) {
434: case 4:
435: return tight_fill_palette32(vs, x, y, max, count, bg, fg, palette);
436: case 2:
437: return tight_fill_palette16(vs, x, y, max, count, bg, fg, palette);
438: default:
439: max = 2;
440: return tight_fill_palette8(vs, x, y, max, count, bg, fg, palette);
441: }
442: return 0;
443: }
444:
445: /*
446: * Converting truecolor samples into palette indices.
447: */
448: #define DEFINE_IDX_ENCODE_FUNCTION(bpp) \
449: \
450: static void \
451: tight_encode_indexed_rect##bpp(uint8_t *buf, int count, \
452: VncPalette *palette) { \
453: uint##bpp##_t *src; \
454: uint##bpp##_t rgb; \
455: int i, rep; \
456: uint8_t idx; \
457: \
458: src = (uint##bpp##_t *) buf; \
459: \
460: for (i = 0; i < count; i++) { \
461: \
462: rgb = *src++; \
463: rep = 0; \
464: while (i < count && *src == rgb) { \
465: rep++, src++, i++; \
466: } \
467: idx = palette_idx(palette, rgb); \
468: /* \
469: * Should never happen, but don't break everything \
470: * if it does, use the first color instead \
471: */ \
1.1.1.2 root 472: if (idx == (uint8_t)-1) { \
1.1 root 473: idx = 0; \
474: } \
475: while (rep >= 0) { \
476: *buf++ = idx; \
477: rep--; \
478: } \
479: } \
480: }
481:
482: DEFINE_IDX_ENCODE_FUNCTION(16)
483: DEFINE_IDX_ENCODE_FUNCTION(32)
484:
485: #define DEFINE_MONO_ENCODE_FUNCTION(bpp) \
486: \
487: static void \
488: tight_encode_mono_rect##bpp(uint8_t *buf, int w, int h, \
489: uint##bpp##_t bg, uint##bpp##_t fg) { \
490: uint##bpp##_t *ptr; \
491: unsigned int value, mask; \
492: int aligned_width; \
493: int x, y, bg_bits; \
494: \
495: ptr = (uint##bpp##_t *) buf; \
496: aligned_width = w - w % 8; \
497: \
498: for (y = 0; y < h; y++) { \
499: for (x = 0; x < aligned_width; x += 8) { \
500: for (bg_bits = 0; bg_bits < 8; bg_bits++) { \
501: if (*ptr++ != bg) { \
502: break; \
503: } \
504: } \
505: if (bg_bits == 8) { \
506: *buf++ = 0; \
507: continue; \
508: } \
509: mask = 0x80 >> bg_bits; \
510: value = mask; \
511: for (bg_bits++; bg_bits < 8; bg_bits++) { \
512: mask >>= 1; \
513: if (*ptr++ != bg) { \
514: value |= mask; \
515: } \
516: } \
517: *buf++ = (uint8_t)value; \
518: } \
519: \
520: mask = 0x80; \
521: value = 0; \
522: if (x >= w) { \
523: continue; \
524: } \
525: \
526: for (; x < w; x++) { \
527: if (*ptr++ != bg) { \
528: value |= mask; \
529: } \
530: mask >>= 1; \
531: } \
532: *buf++ = (uint8_t)value; \
533: } \
534: }
535:
536: DEFINE_MONO_ENCODE_FUNCTION(8)
537: DEFINE_MONO_ENCODE_FUNCTION(16)
538: DEFINE_MONO_ENCODE_FUNCTION(32)
539:
540: /*
541: * ``Gradient'' filter for 24-bit color samples.
542: * Should be called only when redMax, greenMax and blueMax are 255.
543: * Color components assumed to be byte-aligned.
544: */
545:
546: static void
547: tight_filter_gradient24(VncState *vs, uint8_t *buf, int w, int h)
548: {
549: uint32_t *buf32;
550: uint32_t pix32;
551: int shift[3];
552: int *prev;
553: int here[3], upper[3], left[3], upperleft[3];
554: int prediction;
555: int x, y, c;
556:
557: buf32 = (uint32_t *)buf;
558: memset(vs->tight.gradient.buffer, 0, w * 3 * sizeof(int));
559:
560: if ((vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG) ==
561: (vs->ds->surface->flags & QEMU_BIG_ENDIAN_FLAG)) {
562: shift[0] = vs->clientds.pf.rshift;
563: shift[1] = vs->clientds.pf.gshift;
564: shift[2] = vs->clientds.pf.bshift;
565: } else {
566: shift[0] = 24 - vs->clientds.pf.rshift;
567: shift[1] = 24 - vs->clientds.pf.gshift;
568: shift[2] = 24 - vs->clientds.pf.bshift;
569: }
570:
571: for (y = 0; y < h; y++) {
572: for (c = 0; c < 3; c++) {
573: upper[c] = 0;
574: here[c] = 0;
575: }
576: prev = (int *)vs->tight.gradient.buffer;
577: for (x = 0; x < w; x++) {
578: pix32 = *buf32++;
579: for (c = 0; c < 3; c++) {
580: upperleft[c] = upper[c];
581: left[c] = here[c];
582: upper[c] = *prev;
583: here[c] = (int)(pix32 >> shift[c] & 0xFF);
584: *prev++ = here[c];
585:
586: prediction = left[c] + upper[c] - upperleft[c];
587: if (prediction < 0) {
588: prediction = 0;
589: } else if (prediction > 0xFF) {
590: prediction = 0xFF;
591: }
592: *buf++ = (char)(here[c] - prediction);
593: }
594: }
595: }
596: }
597:
598:
599: /*
600: * ``Gradient'' filter for other color depths.
601: */
602:
603: #define DEFINE_GRADIENT_FILTER_FUNCTION(bpp) \
604: \
605: static void \
606: tight_filter_gradient##bpp(VncState *vs, uint##bpp##_t *buf, \
607: int w, int h) { \
608: uint##bpp##_t pix, diff; \
609: bool endian; \
610: int *prev; \
611: int max[3], shift[3]; \
612: int here[3], upper[3], left[3], upperleft[3]; \
613: int prediction; \
614: int x, y, c; \
615: \
616: memset (vs->tight.gradient.buffer, 0, w * 3 * sizeof(int)); \
617: \
618: endian = ((vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG) != \
619: (vs->ds->surface->flags & QEMU_BIG_ENDIAN_FLAG)); \
620: \
621: max[0] = vs->clientds.pf.rmax; \
622: max[1] = vs->clientds.pf.gmax; \
623: max[2] = vs->clientds.pf.bmax; \
624: shift[0] = vs->clientds.pf.rshift; \
625: shift[1] = vs->clientds.pf.gshift; \
626: shift[2] = vs->clientds.pf.bshift; \
627: \
628: for (y = 0; y < h; y++) { \
629: for (c = 0; c < 3; c++) { \
630: upper[c] = 0; \
631: here[c] = 0; \
632: } \
633: prev = (int *)vs->tight.gradient.buffer; \
634: for (x = 0; x < w; x++) { \
635: pix = *buf; \
636: if (endian) { \
1.1.1.2 root 637: pix = bswap##bpp(pix); \
1.1 root 638: } \
639: diff = 0; \
640: for (c = 0; c < 3; c++) { \
641: upperleft[c] = upper[c]; \
642: left[c] = here[c]; \
643: upper[c] = *prev; \
644: here[c] = (int)(pix >> shift[c] & max[c]); \
645: *prev++ = here[c]; \
646: \
647: prediction = left[c] + upper[c] - upperleft[c]; \
648: if (prediction < 0) { \
649: prediction = 0; \
650: } else if (prediction > max[c]) { \
651: prediction = max[c]; \
652: } \
653: diff |= ((here[c] - prediction) & max[c]) \
654: << shift[c]; \
655: } \
656: if (endian) { \
1.1.1.2 root 657: diff = bswap##bpp(diff); \
1.1 root 658: } \
659: *buf++ = diff; \
660: } \
661: } \
662: }
663:
664: DEFINE_GRADIENT_FILTER_FUNCTION(16)
665: DEFINE_GRADIENT_FILTER_FUNCTION(32)
666:
667: /*
668: * Check if a rectangle is all of the same color. If needSameColor is
669: * set to non-zero, then also check that its color equals to the
1.1.1.2 root 670: * *colorPtr value. The result is 1 if the test is successful, and in
1.1 root 671: * that case new color will be stored in *colorPtr.
672: */
673:
674: #define DEFINE_CHECK_SOLID_FUNCTION(bpp) \
675: \
676: static bool \
677: check_solid_tile##bpp(VncState *vs, int x, int y, int w, int h, \
678: uint32_t* color, bool samecolor) \
679: { \
680: VncDisplay *vd = vs->vd; \
681: uint##bpp##_t *fbptr; \
682: uint##bpp##_t c; \
683: int dx, dy; \
684: \
685: fbptr = (uint##bpp##_t *) \
686: (vd->server->data + y * ds_get_linesize(vs->ds) + \
687: x * ds_get_bytes_per_pixel(vs->ds)); \
688: \
689: c = *fbptr; \
690: if (samecolor && (uint32_t)c != *color) { \
691: return false; \
692: } \
693: \
694: for (dy = 0; dy < h; dy++) { \
695: for (dx = 0; dx < w; dx++) { \
696: if (c != fbptr[dx]) { \
697: return false; \
698: } \
699: } \
700: fbptr = (uint##bpp##_t *) \
701: ((uint8_t *)fbptr + ds_get_linesize(vs->ds)); \
702: } \
703: \
704: *color = (uint32_t)c; \
705: return true; \
706: }
707:
708: DEFINE_CHECK_SOLID_FUNCTION(32)
709: DEFINE_CHECK_SOLID_FUNCTION(16)
710: DEFINE_CHECK_SOLID_FUNCTION(8)
711:
712: static bool check_solid_tile(VncState *vs, int x, int y, int w, int h,
713: uint32_t* color, bool samecolor)
714: {
715: VncDisplay *vd = vs->vd;
716:
717: switch(vd->server->pf.bytes_per_pixel) {
718: case 4:
719: return check_solid_tile32(vs, x, y, w, h, color, samecolor);
720: case 2:
721: return check_solid_tile16(vs, x, y, w, h, color, samecolor);
722: default:
723: return check_solid_tile8(vs, x, y, w, h, color, samecolor);
724: }
725: }
726:
727: static void find_best_solid_area(VncState *vs, int x, int y, int w, int h,
728: uint32_t color, int *w_ptr, int *h_ptr)
729: {
730: int dx, dy, dw, dh;
731: int w_prev;
732: int w_best = 0, h_best = 0;
733:
734: w_prev = w;
735:
736: for (dy = y; dy < y + h; dy += VNC_TIGHT_MAX_SPLIT_TILE_SIZE) {
737:
738: dh = MIN(VNC_TIGHT_MAX_SPLIT_TILE_SIZE, y + h - dy);
739: dw = MIN(VNC_TIGHT_MAX_SPLIT_TILE_SIZE, w_prev);
740:
741: if (!check_solid_tile(vs, x, dy, dw, dh, &color, true)) {
742: break;
743: }
744:
745: for (dx = x + dw; dx < x + w_prev;) {
746: dw = MIN(VNC_TIGHT_MAX_SPLIT_TILE_SIZE, x + w_prev - dx);
747:
748: if (!check_solid_tile(vs, dx, dy, dw, dh, &color, true)) {
749: break;
750: }
751: dx += dw;
752: }
753:
754: w_prev = dx - x;
755: if (w_prev * (dy + dh - y) > w_best * h_best) {
756: w_best = w_prev;
757: h_best = dy + dh - y;
758: }
759: }
760:
761: *w_ptr = w_best;
762: *h_ptr = h_best;
763: }
764:
765: static void extend_solid_area(VncState *vs, int x, int y, int w, int h,
766: uint32_t color, int *x_ptr, int *y_ptr,
767: int *w_ptr, int *h_ptr)
768: {
769: int cx, cy;
770:
771: /* Try to extend the area upwards. */
772: for ( cy = *y_ptr - 1;
773: cy >= y && check_solid_tile(vs, *x_ptr, cy, *w_ptr, 1, &color, true);
774: cy-- );
775: *h_ptr += *y_ptr - (cy + 1);
776: *y_ptr = cy + 1;
777:
778: /* ... downwards. */
779: for ( cy = *y_ptr + *h_ptr;
780: cy < y + h &&
781: check_solid_tile(vs, *x_ptr, cy, *w_ptr, 1, &color, true);
782: cy++ );
783: *h_ptr += cy - (*y_ptr + *h_ptr);
784:
785: /* ... to the left. */
786: for ( cx = *x_ptr - 1;
787: cx >= x && check_solid_tile(vs, cx, *y_ptr, 1, *h_ptr, &color, true);
788: cx-- );
789: *w_ptr += *x_ptr - (cx + 1);
790: *x_ptr = cx + 1;
791:
792: /* ... to the right. */
793: for ( cx = *x_ptr + *w_ptr;
794: cx < x + w &&
795: check_solid_tile(vs, cx, *y_ptr, 1, *h_ptr, &color, true);
796: cx++ );
797: *w_ptr += cx - (*x_ptr + *w_ptr);
798: }
799:
800: static int tight_init_stream(VncState *vs, int stream_id,
801: int level, int strategy)
802: {
803: z_streamp zstream = &vs->tight.stream[stream_id];
804:
805: if (zstream->opaque == NULL) {
806: int err;
807:
808: VNC_DEBUG("VNC: TIGHT: initializing zlib stream %d\n", stream_id);
809: VNC_DEBUG("VNC: TIGHT: opaque = %p | vs = %p\n", zstream->opaque, vs);
810: zstream->zalloc = vnc_zlib_zalloc;
811: zstream->zfree = vnc_zlib_zfree;
812:
813: err = deflateInit2(zstream, level, Z_DEFLATED, MAX_WBITS,
814: MAX_MEM_LEVEL, strategy);
815:
816: if (err != Z_OK) {
817: fprintf(stderr, "VNC: error initializing zlib\n");
818: return -1;
819: }
820:
821: vs->tight.levels[stream_id] = level;
822: zstream->opaque = vs;
823: }
824:
825: if (vs->tight.levels[stream_id] != level) {
826: if (deflateParams(zstream, level, strategy) != Z_OK) {
827: return -1;
828: }
829: vs->tight.levels[stream_id] = level;
830: }
831: return 0;
832: }
833:
834: static void tight_send_compact_size(VncState *vs, size_t len)
835: {
836: int lpc = 0;
837: int bytes = 0;
838: char buf[3] = {0, 0, 0};
839:
840: buf[bytes++] = len & 0x7F;
841: if (len > 0x7F) {
842: buf[bytes-1] |= 0x80;
843: buf[bytes++] = (len >> 7) & 0x7F;
844: if (len > 0x3FFF) {
845: buf[bytes-1] |= 0x80;
846: buf[bytes++] = (len >> 14) & 0xFF;
847: }
848: }
849: for (lpc = 0; lpc < bytes; lpc++) {
850: vnc_write_u8(vs, buf[lpc]);
851: }
852: }
853:
854: static int tight_compress_data(VncState *vs, int stream_id, size_t bytes,
855: int level, int strategy)
856: {
857: z_streamp zstream = &vs->tight.stream[stream_id];
858: int previous_out;
859:
860: if (bytes < VNC_TIGHT_MIN_TO_COMPRESS) {
861: vnc_write(vs, vs->tight.tight.buffer, vs->tight.tight.offset);
862: return bytes;
863: }
864:
865: if (tight_init_stream(vs, stream_id, level, strategy)) {
866: return -1;
867: }
868:
869: /* reserve memory in output buffer */
870: buffer_reserve(&vs->tight.zlib, bytes + 64);
871:
872: /* set pointers */
873: zstream->next_in = vs->tight.tight.buffer;
874: zstream->avail_in = vs->tight.tight.offset;
875: zstream->next_out = vs->tight.zlib.buffer + vs->tight.zlib.offset;
876: zstream->avail_out = vs->tight.zlib.capacity - vs->tight.zlib.offset;
1.1.1.3 root 877: previous_out = zstream->avail_out;
1.1 root 878: zstream->data_type = Z_BINARY;
879:
880: /* start encoding */
881: if (deflate(zstream, Z_SYNC_FLUSH) != Z_OK) {
882: fprintf(stderr, "VNC: error during tight compression\n");
883: return -1;
884: }
885:
886: vs->tight.zlib.offset = vs->tight.zlib.capacity - zstream->avail_out;
1.1.1.3 root 887: /* ...how much data has actually been produced by deflate() */
888: bytes = previous_out - zstream->avail_out;
1.1 root 889:
890: tight_send_compact_size(vs, bytes);
891: vnc_write(vs, vs->tight.zlib.buffer, bytes);
892:
893: buffer_reset(&vs->tight.zlib);
894:
895: return bytes;
896: }
897:
898: /*
899: * Subencoding implementations.
900: */
901: static void tight_pack24(VncState *vs, uint8_t *buf, size_t count, size_t *ret)
902: {
903: uint32_t *buf32;
904: uint32_t pix;
905: int rshift, gshift, bshift;
906:
907: buf32 = (uint32_t *)buf;
908:
909: if ((vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG) ==
910: (vs->ds->surface->flags & QEMU_BIG_ENDIAN_FLAG)) {
911: rshift = vs->clientds.pf.rshift;
912: gshift = vs->clientds.pf.gshift;
913: bshift = vs->clientds.pf.bshift;
914: } else {
915: rshift = 24 - vs->clientds.pf.rshift;
916: gshift = 24 - vs->clientds.pf.gshift;
917: bshift = 24 - vs->clientds.pf.bshift;
918: }
919:
920: if (ret) {
921: *ret = count * 3;
922: }
923:
924: while (count--) {
925: pix = *buf32++;
926: *buf++ = (char)(pix >> rshift);
927: *buf++ = (char)(pix >> gshift);
928: *buf++ = (char)(pix >> bshift);
929: }
930: }
931:
932: static int send_full_color_rect(VncState *vs, int x, int y, int w, int h)
933: {
934: int stream = 0;
1.1.1.2 root 935: ssize_t bytes;
1.1 root 936:
937: #ifdef CONFIG_VNC_PNG
938: if (tight_can_send_png_rect(vs, w, h)) {
939: return send_png_rect(vs, x, y, w, h, NULL);
940: }
941: #endif
942:
943: vnc_write_u8(vs, stream << 4); /* no flushing, no filter */
944:
945: if (vs->tight.pixel24) {
946: tight_pack24(vs, vs->tight.tight.buffer, w * h, &vs->tight.tight.offset);
947: bytes = 3;
948: } else {
949: bytes = vs->clientds.pf.bytes_per_pixel;
950: }
951:
952: bytes = tight_compress_data(vs, stream, w * h * bytes,
953: tight_conf[vs->tight.compression].raw_zlib_level,
954: Z_DEFAULT_STRATEGY);
955:
956: return (bytes >= 0);
957: }
958:
959: static int send_solid_rect(VncState *vs)
960: {
961: size_t bytes;
962:
963: vnc_write_u8(vs, VNC_TIGHT_FILL << 4); /* no flushing, no filter */
964:
965: if (vs->tight.pixel24) {
966: tight_pack24(vs, vs->tight.tight.buffer, 1, &vs->tight.tight.offset);
967: bytes = 3;
968: } else {
969: bytes = vs->clientds.pf.bytes_per_pixel;
970: }
971:
972: vnc_write(vs, vs->tight.tight.buffer, bytes);
973: return 1;
974: }
975:
976: static int send_mono_rect(VncState *vs, int x, int y,
977: int w, int h, uint32_t bg, uint32_t fg)
978: {
1.1.1.2 root 979: ssize_t bytes;
1.1 root 980: int stream = 1;
981: int level = tight_conf[vs->tight.compression].mono_zlib_level;
982:
983: #ifdef CONFIG_VNC_PNG
984: if (tight_can_send_png_rect(vs, w, h)) {
985: int ret;
986: int bpp = vs->clientds.pf.bytes_per_pixel * 8;
987: VncPalette *palette = palette_new(2, bpp);
988:
989: palette_put(palette, bg);
990: palette_put(palette, fg);
991: ret = send_png_rect(vs, x, y, w, h, palette);
992: palette_destroy(palette);
993: return ret;
994: }
995: #endif
996:
997: bytes = ((w + 7) / 8) * h;
998:
999: vnc_write_u8(vs, (stream | VNC_TIGHT_EXPLICIT_FILTER) << 4);
1000: vnc_write_u8(vs, VNC_TIGHT_FILTER_PALETTE);
1001: vnc_write_u8(vs, 1);
1002:
1003: switch(vs->clientds.pf.bytes_per_pixel) {
1004: case 4:
1005: {
1006: uint32_t buf[2] = {bg, fg};
1007: size_t ret = sizeof (buf);
1008:
1009: if (vs->tight.pixel24) {
1010: tight_pack24(vs, (unsigned char*)buf, 2, &ret);
1011: }
1012: vnc_write(vs, buf, ret);
1013:
1014: tight_encode_mono_rect32(vs->tight.tight.buffer, w, h, bg, fg);
1015: break;
1016: }
1017: case 2:
1018: vnc_write(vs, &bg, 2);
1019: vnc_write(vs, &fg, 2);
1020: tight_encode_mono_rect16(vs->tight.tight.buffer, w, h, bg, fg);
1021: break;
1022: default:
1023: vnc_write_u8(vs, bg);
1024: vnc_write_u8(vs, fg);
1025: tight_encode_mono_rect8(vs->tight.tight.buffer, w, h, bg, fg);
1026: break;
1027: }
1028: vs->tight.tight.offset = bytes;
1029:
1030: bytes = tight_compress_data(vs, stream, bytes, level, Z_DEFAULT_STRATEGY);
1031: return (bytes >= 0);
1032: }
1033:
1034: struct palette_cb_priv {
1035: VncState *vs;
1036: uint8_t *header;
1037: #ifdef CONFIG_VNC_PNG
1038: png_colorp png_palette;
1039: #endif
1040: };
1041:
1042: static void write_palette(int idx, uint32_t color, void *opaque)
1043: {
1044: struct palette_cb_priv *priv = opaque;
1045: VncState *vs = priv->vs;
1046: uint32_t bytes = vs->clientds.pf.bytes_per_pixel;
1047:
1048: if (bytes == 4) {
1049: ((uint32_t*)priv->header)[idx] = color;
1050: } else {
1051: ((uint16_t*)priv->header)[idx] = color;
1052: }
1053: }
1054:
1055: static bool send_gradient_rect(VncState *vs, int x, int y, int w, int h)
1056: {
1057: int stream = 3;
1058: int level = tight_conf[vs->tight.compression].gradient_zlib_level;
1.1.1.2 root 1059: ssize_t bytes;
1.1 root 1060:
1061: if (vs->clientds.pf.bytes_per_pixel == 1)
1062: return send_full_color_rect(vs, x, y, w, h);
1063:
1064: vnc_write_u8(vs, (stream | VNC_TIGHT_EXPLICIT_FILTER) << 4);
1065: vnc_write_u8(vs, VNC_TIGHT_FILTER_GRADIENT);
1066:
1067: buffer_reserve(&vs->tight.gradient, w * 3 * sizeof (int));
1068:
1069: if (vs->tight.pixel24) {
1070: tight_filter_gradient24(vs, vs->tight.tight.buffer, w, h);
1071: bytes = 3;
1072: } else if (vs->clientds.pf.bytes_per_pixel == 4) {
1073: tight_filter_gradient32(vs, (uint32_t *)vs->tight.tight.buffer, w, h);
1074: bytes = 4;
1075: } else {
1076: tight_filter_gradient16(vs, (uint16_t *)vs->tight.tight.buffer, w, h);
1077: bytes = 2;
1078: }
1079:
1080: buffer_reset(&vs->tight.gradient);
1081:
1082: bytes = w * h * bytes;
1083: vs->tight.tight.offset = bytes;
1084:
1085: bytes = tight_compress_data(vs, stream, bytes,
1086: level, Z_FILTERED);
1087: return (bytes >= 0);
1088: }
1089:
1090: static int send_palette_rect(VncState *vs, int x, int y,
1091: int w, int h, VncPalette *palette)
1092: {
1093: int stream = 2;
1094: int level = tight_conf[vs->tight.compression].idx_zlib_level;
1095: int colors;
1.1.1.2 root 1096: ssize_t bytes;
1.1 root 1097:
1098: #ifdef CONFIG_VNC_PNG
1099: if (tight_can_send_png_rect(vs, w, h)) {
1100: return send_png_rect(vs, x, y, w, h, palette);
1101: }
1102: #endif
1103:
1104: colors = palette_size(palette);
1105:
1106: vnc_write_u8(vs, (stream | VNC_TIGHT_EXPLICIT_FILTER) << 4);
1107: vnc_write_u8(vs, VNC_TIGHT_FILTER_PALETTE);
1108: vnc_write_u8(vs, colors - 1);
1109:
1110: switch(vs->clientds.pf.bytes_per_pixel) {
1111: case 4:
1112: {
1113: size_t old_offset, offset;
1114: uint32_t header[palette_size(palette)];
1115: struct palette_cb_priv priv = { vs, (uint8_t *)header };
1116:
1117: old_offset = vs->output.offset;
1118: palette_iter(palette, write_palette, &priv);
1119: vnc_write(vs, header, sizeof(header));
1120:
1121: if (vs->tight.pixel24) {
1122: tight_pack24(vs, vs->output.buffer + old_offset, colors, &offset);
1123: vs->output.offset = old_offset + offset;
1124: }
1125:
1126: tight_encode_indexed_rect32(vs->tight.tight.buffer, w * h, palette);
1127: break;
1128: }
1129: case 2:
1130: {
1131: uint16_t header[palette_size(palette)];
1132: struct palette_cb_priv priv = { vs, (uint8_t *)header };
1133:
1134: palette_iter(palette, write_palette, &priv);
1135: vnc_write(vs, header, sizeof(header));
1136: tight_encode_indexed_rect16(vs->tight.tight.buffer, w * h, palette);
1137: break;
1138: }
1139: default:
1140: return -1; /* No palette for 8bits colors */
1141: break;
1142: }
1143: bytes = w * h;
1144: vs->tight.tight.offset = bytes;
1145:
1146: bytes = tight_compress_data(vs, stream, bytes,
1147: level, Z_DEFAULT_STRATEGY);
1148: return (bytes >= 0);
1149: }
1150:
1151: #if defined(CONFIG_VNC_JPEG) || defined(CONFIG_VNC_PNG)
1152: static void rgb_prepare_row24(VncState *vs, uint8_t *dst, int x, int y,
1153: int count)
1154: {
1155: VncDisplay *vd = vs->vd;
1156: uint32_t *fbptr;
1157: uint32_t pix;
1158:
1159: fbptr = (uint32_t *)(vd->server->data + y * ds_get_linesize(vs->ds) +
1160: x * ds_get_bytes_per_pixel(vs->ds));
1161:
1162: while (count--) {
1163: pix = *fbptr++;
1164: *dst++ = (uint8_t)(pix >> vs->ds->surface->pf.rshift);
1165: *dst++ = (uint8_t)(pix >> vs->ds->surface->pf.gshift);
1166: *dst++ = (uint8_t)(pix >> vs->ds->surface->pf.bshift);
1167: }
1168: }
1169:
1170: #define DEFINE_RGB_GET_ROW_FUNCTION(bpp) \
1171: \
1172: static void \
1173: rgb_prepare_row##bpp(VncState *vs, uint8_t *dst, \
1174: int x, int y, int count) \
1175: { \
1176: VncDisplay *vd = vs->vd; \
1177: uint##bpp##_t *fbptr; \
1178: uint##bpp##_t pix; \
1179: int r, g, b; \
1180: \
1181: fbptr = (uint##bpp##_t *) \
1182: (vd->server->data + y * ds_get_linesize(vs->ds) + \
1183: x * ds_get_bytes_per_pixel(vs->ds)); \
1184: \
1185: while (count--) { \
1186: pix = *fbptr++; \
1187: \
1188: r = (int)((pix >> vs->ds->surface->pf.rshift) \
1189: & vs->ds->surface->pf.rmax); \
1190: g = (int)((pix >> vs->ds->surface->pf.gshift) \
1191: & vs->ds->surface->pf.gmax); \
1192: b = (int)((pix >> vs->ds->surface->pf.bshift) \
1193: & vs->ds->surface->pf.bmax); \
1194: \
1195: *dst++ = (uint8_t)((r * 255 + vs->ds->surface->pf.rmax / 2) \
1196: / vs->ds->surface->pf.rmax); \
1197: *dst++ = (uint8_t)((g * 255 + vs->ds->surface->pf.gmax / 2) \
1198: / vs->ds->surface->pf.gmax); \
1199: *dst++ = (uint8_t)((b * 255 + vs->ds->surface->pf.bmax / 2) \
1200: / vs->ds->surface->pf.bmax); \
1201: } \
1202: }
1203:
1204: DEFINE_RGB_GET_ROW_FUNCTION(16)
1205: DEFINE_RGB_GET_ROW_FUNCTION(32)
1206:
1207: static void rgb_prepare_row(VncState *vs, uint8_t *dst, int x, int y,
1208: int count)
1209: {
1210: if (ds_get_bytes_per_pixel(vs->ds) == 4) {
1211: if (vs->ds->surface->pf.rmax == 0xFF &&
1212: vs->ds->surface->pf.gmax == 0xFF &&
1213: vs->ds->surface->pf.bmax == 0xFF) {
1214: rgb_prepare_row24(vs, dst, x, y, count);
1215: } else {
1216: rgb_prepare_row32(vs, dst, x, y, count);
1217: }
1218: } else {
1219: rgb_prepare_row16(vs, dst, x, y, count);
1220: }
1221: }
1222: #endif /* CONFIG_VNC_JPEG or CONFIG_VNC_PNG */
1223:
1224: /*
1225: * JPEG compression stuff.
1226: */
1227: #ifdef CONFIG_VNC_JPEG
1228: /*
1229: * Destination manager implementation for JPEG library.
1230: */
1231:
1232: /* This is called once per encoding */
1233: static void jpeg_init_destination(j_compress_ptr cinfo)
1234: {
1235: VncState *vs = cinfo->client_data;
1236: Buffer *buffer = &vs->tight.jpeg;
1237:
1238: cinfo->dest->next_output_byte = (JOCTET *)buffer->buffer + buffer->offset;
1239: cinfo->dest->free_in_buffer = (size_t)(buffer->capacity - buffer->offset);
1240: }
1241:
1242: /* This is called when we ran out of buffer (shouldn't happen!) */
1243: static boolean jpeg_empty_output_buffer(j_compress_ptr cinfo)
1244: {
1245: VncState *vs = cinfo->client_data;
1246: Buffer *buffer = &vs->tight.jpeg;
1247:
1248: buffer->offset = buffer->capacity;
1249: buffer_reserve(buffer, 2048);
1250: jpeg_init_destination(cinfo);
1251: return TRUE;
1252: }
1253:
1254: /* This is called when we are done processing data */
1255: static void jpeg_term_destination(j_compress_ptr cinfo)
1256: {
1257: VncState *vs = cinfo->client_data;
1258: Buffer *buffer = &vs->tight.jpeg;
1259:
1260: buffer->offset = buffer->capacity - cinfo->dest->free_in_buffer;
1261: }
1262:
1263: static int send_jpeg_rect(VncState *vs, int x, int y, int w, int h, int quality)
1264: {
1265: struct jpeg_compress_struct cinfo;
1266: struct jpeg_error_mgr jerr;
1267: struct jpeg_destination_mgr manager;
1268: JSAMPROW row[1];
1269: uint8_t *buf;
1270: int dy;
1271:
1272: if (ds_get_bytes_per_pixel(vs->ds) == 1)
1273: return send_full_color_rect(vs, x, y, w, h);
1274:
1275: buffer_reserve(&vs->tight.jpeg, 2048);
1276:
1277: cinfo.err = jpeg_std_error(&jerr);
1278: jpeg_create_compress(&cinfo);
1279:
1280: cinfo.client_data = vs;
1281: cinfo.image_width = w;
1282: cinfo.image_height = h;
1283: cinfo.input_components = 3;
1284: cinfo.in_color_space = JCS_RGB;
1285:
1286: jpeg_set_defaults(&cinfo);
1287: jpeg_set_quality(&cinfo, quality, true);
1288:
1289: manager.init_destination = jpeg_init_destination;
1290: manager.empty_output_buffer = jpeg_empty_output_buffer;
1291: manager.term_destination = jpeg_term_destination;
1292: cinfo.dest = &manager;
1293:
1294: jpeg_start_compress(&cinfo, true);
1295:
1296: buf = qemu_malloc(w * 3);
1297: row[0] = buf;
1298: for (dy = 0; dy < h; dy++) {
1299: rgb_prepare_row(vs, buf, x, y + dy, w);
1300: jpeg_write_scanlines(&cinfo, row, 1);
1301: }
1302: qemu_free(buf);
1303:
1304: jpeg_finish_compress(&cinfo);
1305: jpeg_destroy_compress(&cinfo);
1306:
1307: vnc_write_u8(vs, VNC_TIGHT_JPEG << 4);
1308:
1309: tight_send_compact_size(vs, vs->tight.jpeg.offset);
1310: vnc_write(vs, vs->tight.jpeg.buffer, vs->tight.jpeg.offset);
1311: buffer_reset(&vs->tight.jpeg);
1312:
1313: return 1;
1314: }
1315: #endif /* CONFIG_VNC_JPEG */
1316:
1317: /*
1318: * PNG compression stuff.
1319: */
1320: #ifdef CONFIG_VNC_PNG
1321: static void write_png_palette(int idx, uint32_t pix, void *opaque)
1322: {
1323: struct palette_cb_priv *priv = opaque;
1324: VncState *vs = priv->vs;
1325: png_colorp color = &priv->png_palette[idx];
1326:
1327: if (vs->tight.pixel24)
1328: {
1329: color->red = (pix >> vs->clientds.pf.rshift) & vs->clientds.pf.rmax;
1330: color->green = (pix >> vs->clientds.pf.gshift) & vs->clientds.pf.gmax;
1331: color->blue = (pix >> vs->clientds.pf.bshift) & vs->clientds.pf.bmax;
1332: }
1333: else
1334: {
1335: int red, green, blue;
1336:
1337: red = (pix >> vs->clientds.pf.rshift) & vs->clientds.pf.rmax;
1338: green = (pix >> vs->clientds.pf.gshift) & vs->clientds.pf.gmax;
1339: blue = (pix >> vs->clientds.pf.bshift) & vs->clientds.pf.bmax;
1340: color->red = ((red * 255 + vs->clientds.pf.rmax / 2) /
1341: vs->clientds.pf.rmax);
1342: color->green = ((green * 255 + vs->clientds.pf.gmax / 2) /
1343: vs->clientds.pf.gmax);
1344: color->blue = ((blue * 255 + vs->clientds.pf.bmax / 2) /
1345: vs->clientds.pf.bmax);
1346: }
1347: }
1348:
1349: static void png_write_data(png_structp png_ptr, png_bytep data,
1350: png_size_t length)
1351: {
1352: VncState *vs = png_get_io_ptr(png_ptr);
1353:
1354: buffer_reserve(&vs->tight.png, vs->tight.png.offset + length);
1355: memcpy(vs->tight.png.buffer + vs->tight.png.offset, data, length);
1356:
1357: vs->tight.png.offset += length;
1358: }
1359:
1360: static void png_flush_data(png_structp png_ptr)
1361: {
1362: }
1363:
1364: static void *vnc_png_malloc(png_structp png_ptr, png_size_t size)
1365: {
1366: return qemu_malloc(size);
1367: }
1368:
1369: static void vnc_png_free(png_structp png_ptr, png_voidp ptr)
1370: {
1371: qemu_free(ptr);
1372: }
1373:
1374: static int send_png_rect(VncState *vs, int x, int y, int w, int h,
1375: VncPalette *palette)
1376: {
1377: png_byte color_type;
1378: png_structp png_ptr;
1379: png_infop info_ptr;
1380: png_colorp png_palette = NULL;
1381: int level = tight_png_conf[vs->tight.compression].png_zlib_level;
1382: int filters = tight_png_conf[vs->tight.compression].png_filters;
1383: uint8_t *buf;
1384: int dy;
1385:
1386: png_ptr = png_create_write_struct_2(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL,
1387: NULL, vnc_png_malloc, vnc_png_free);
1388:
1389: if (png_ptr == NULL)
1390: return -1;
1391:
1392: info_ptr = png_create_info_struct(png_ptr);
1393:
1394: if (info_ptr == NULL) {
1395: png_destroy_write_struct(&png_ptr, NULL);
1396: return -1;
1397: }
1398:
1399: png_set_write_fn(png_ptr, (void *) vs, png_write_data, png_flush_data);
1400: png_set_compression_level(png_ptr, level);
1401: png_set_filter(png_ptr, PNG_FILTER_TYPE_DEFAULT, filters);
1402:
1403: if (palette) {
1404: color_type = PNG_COLOR_TYPE_PALETTE;
1405: } else {
1406: color_type = PNG_COLOR_TYPE_RGB;
1407: }
1408:
1409: png_set_IHDR(png_ptr, info_ptr, w, h,
1410: 8, color_type, PNG_INTERLACE_NONE,
1411: PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
1412:
1413: if (color_type == PNG_COLOR_TYPE_PALETTE) {
1414: struct palette_cb_priv priv;
1415:
1416: png_palette = png_malloc(png_ptr, sizeof(*png_palette) *
1417: palette_size(palette));
1418:
1419: priv.vs = vs;
1420: priv.png_palette = png_palette;
1421: palette_iter(palette, write_png_palette, &priv);
1422:
1423: png_set_PLTE(png_ptr, info_ptr, png_palette, palette_size(palette));
1424:
1425: if (vs->clientds.pf.bytes_per_pixel == 4) {
1426: tight_encode_indexed_rect32(vs->tight.tight.buffer, w * h, palette);
1427: } else {
1428: tight_encode_indexed_rect16(vs->tight.tight.buffer, w * h, palette);
1429: }
1430: }
1431:
1432: png_write_info(png_ptr, info_ptr);
1433:
1434: buffer_reserve(&vs->tight.png, 2048);
1435: buf = qemu_malloc(w * 3);
1436: for (dy = 0; dy < h; dy++)
1437: {
1438: if (color_type == PNG_COLOR_TYPE_PALETTE) {
1439: memcpy(buf, vs->tight.tight.buffer + (dy * w), w);
1440: } else {
1441: rgb_prepare_row(vs, buf, x, y + dy, w);
1442: }
1443: png_write_row(png_ptr, buf);
1444: }
1445: qemu_free(buf);
1446:
1447: png_write_end(png_ptr, NULL);
1448:
1449: if (color_type == PNG_COLOR_TYPE_PALETTE) {
1450: png_free(png_ptr, png_palette);
1451: }
1452:
1453: png_destroy_write_struct(&png_ptr, &info_ptr);
1454:
1455: vnc_write_u8(vs, VNC_TIGHT_PNG << 4);
1456:
1457: tight_send_compact_size(vs, vs->tight.png.offset);
1458: vnc_write(vs, vs->tight.png.buffer, vs->tight.png.offset);
1459: buffer_reset(&vs->tight.png);
1460: return 1;
1461: }
1462: #endif /* CONFIG_VNC_PNG */
1463:
1464: static void vnc_tight_start(VncState *vs)
1465: {
1466: buffer_reset(&vs->tight.tight);
1467:
1468: // make the output buffer be the zlib buffer, so we can compress it later
1469: vs->tight.tmp = vs->output;
1470: vs->output = vs->tight.tight;
1471: }
1472:
1473: static void vnc_tight_stop(VncState *vs)
1474: {
1475: // switch back to normal output/zlib buffers
1476: vs->tight.tight = vs->output;
1477: vs->output = vs->tight.tmp;
1478: }
1479:
1480: static int send_sub_rect_nojpeg(VncState *vs, int x, int y, int w, int h,
1481: int bg, int fg, int colors, VncPalette *palette)
1482: {
1483: int ret;
1484:
1485: if (colors == 0) {
1486: if (tight_detect_smooth_image(vs, w, h)) {
1487: ret = send_gradient_rect(vs, x, y, w, h);
1488: } else {
1489: ret = send_full_color_rect(vs, x, y, w, h);
1490: }
1491: } else if (colors == 1) {
1492: ret = send_solid_rect(vs);
1493: } else if (colors == 2) {
1494: ret = send_mono_rect(vs, x, y, w, h, bg, fg);
1495: } else if (colors <= 256) {
1496: ret = send_palette_rect(vs, x, y, w, h, palette);
1.1.1.2 root 1497: } else {
1498: ret = 0;
1.1 root 1499: }
1500: return ret;
1501: }
1502:
1503: #ifdef CONFIG_VNC_JPEG
1504: static int send_sub_rect_jpeg(VncState *vs, int x, int y, int w, int h,
1505: int bg, int fg, int colors,
1.1.1.4 ! root 1506: VncPalette *palette, bool force)
1.1 root 1507: {
1508: int ret;
1509:
1510: if (colors == 0) {
1.1.1.4 ! root 1511: if (force || (tight_jpeg_conf[vs->tight.quality].jpeg_full &&
! 1512: tight_detect_smooth_image(vs, w, h))) {
1.1 root 1513: int quality = tight_conf[vs->tight.quality].jpeg_quality;
1514:
1515: ret = send_jpeg_rect(vs, x, y, w, h, quality);
1516: } else {
1517: ret = send_full_color_rect(vs, x, y, w, h);
1518: }
1519: } else if (colors == 1) {
1520: ret = send_solid_rect(vs);
1521: } else if (colors == 2) {
1522: ret = send_mono_rect(vs, x, y, w, h, bg, fg);
1523: } else if (colors <= 256) {
1.1.1.4 ! root 1524: if (force || (colors > 96 &&
! 1525: tight_jpeg_conf[vs->tight.quality].jpeg_idx &&
! 1526: tight_detect_smooth_image(vs, w, h))) {
1.1 root 1527: int quality = tight_conf[vs->tight.quality].jpeg_quality;
1528:
1529: ret = send_jpeg_rect(vs, x, y, w, h, quality);
1530: } else {
1531: ret = send_palette_rect(vs, x, y, w, h, palette);
1532: }
1.1.1.2 root 1533: } else {
1534: ret = 0;
1.1 root 1535: }
1536: return ret;
1537: }
1538: #endif
1539:
1540: static int send_sub_rect(VncState *vs, int x, int y, int w, int h)
1541: {
1542: VncPalette *palette = NULL;
1543: uint32_t bg = 0, fg = 0;
1544: int colors;
1545: int ret = 0;
1.1.1.4 ! root 1546: #ifdef CONFIG_VNC_JPEG
! 1547: bool force_jpeg = false;
! 1548: bool allow_jpeg = true;
! 1549: #endif
1.1 root 1550:
1551: vnc_framebuffer_update(vs, x, y, w, h, vs->tight.type);
1552:
1553: vnc_tight_start(vs);
1554: vnc_raw_send_framebuffer_update(vs, x, y, w, h);
1555: vnc_tight_stop(vs);
1556:
1.1.1.4 ! root 1557: #ifdef CONFIG_VNC_JPEG
! 1558: if (!vs->vd->non_adaptive && vs->tight.quality != (uint8_t)-1) {
! 1559: double freq = vnc_update_freq(vs, x, y, w, h);
! 1560:
! 1561: if (freq < tight_jpeg_conf[vs->tight.quality].jpeg_freq_min) {
! 1562: allow_jpeg = false;
! 1563: }
! 1564: if (freq >= tight_jpeg_conf[vs->tight.quality].jpeg_freq_threshold) {
! 1565: force_jpeg = true;
! 1566: vnc_sent_lossy_rect(vs, x, y, w, h);
! 1567: }
! 1568: }
! 1569: #endif
! 1570:
1.1 root 1571: colors = tight_fill_palette(vs, x, y, w * h, &fg, &bg, &palette);
1572:
1573: #ifdef CONFIG_VNC_JPEG
1.1.1.4 ! root 1574: if (allow_jpeg && vs->tight.quality != (uint8_t)-1) {
! 1575: ret = send_sub_rect_jpeg(vs, x, y, w, h, bg, fg, colors, palette,
! 1576: force_jpeg);
1.1 root 1577: } else {
1578: ret = send_sub_rect_nojpeg(vs, x, y, w, h, bg, fg, colors, palette);
1579: }
1580: #else
1581: ret = send_sub_rect_nojpeg(vs, x, y, w, h, bg, fg, colors, palette);
1582: #endif
1583:
1584: palette_destroy(palette);
1585: return ret;
1586: }
1587:
1588: static int send_sub_rect_solid(VncState *vs, int x, int y, int w, int h)
1589: {
1590: vnc_framebuffer_update(vs, x, y, w, h, vs->tight.type);
1591:
1592: vnc_tight_start(vs);
1593: vnc_raw_send_framebuffer_update(vs, x, y, w, h);
1594: vnc_tight_stop(vs);
1595:
1596: return send_solid_rect(vs);
1597: }
1598:
1.1.1.4 ! root 1599: static int send_rect_simple(VncState *vs, int x, int y, int w, int h,
! 1600: bool split)
1.1 root 1601: {
1602: int max_size, max_width;
1603: int max_sub_width, max_sub_height;
1604: int dx, dy;
1605: int rw, rh;
1606: int n = 0;
1607:
1608: max_size = tight_conf[vs->tight.compression].max_rect_size;
1609: max_width = tight_conf[vs->tight.compression].max_rect_width;
1610:
1.1.1.4 ! root 1611: if (split && (w > max_width || w * h > max_size)) {
1.1 root 1612: max_sub_width = (w > max_width) ? max_width : w;
1613: max_sub_height = max_size / max_sub_width;
1614:
1615: for (dy = 0; dy < h; dy += max_sub_height) {
1616: for (dx = 0; dx < w; dx += max_width) {
1617: rw = MIN(max_sub_width, w - dx);
1618: rh = MIN(max_sub_height, h - dy);
1619: n += send_sub_rect(vs, x+dx, y+dy, rw, rh);
1620: }
1621: }
1622: } else {
1623: n += send_sub_rect(vs, x, y, w, h);
1624: }
1625:
1626: return n;
1627: }
1628:
1629: static int find_large_solid_color_rect(VncState *vs, int x, int y,
1630: int w, int h, int max_rows)
1631: {
1632: int dx, dy, dw, dh;
1633: int n = 0;
1634:
1635: /* Try to find large solid-color areas and send them separately. */
1636:
1637: for (dy = y; dy < y + h; dy += VNC_TIGHT_MAX_SPLIT_TILE_SIZE) {
1638:
1639: /* If a rectangle becomes too large, send its upper part now. */
1640:
1641: if (dy - y >= max_rows) {
1.1.1.4 ! root 1642: n += send_rect_simple(vs, x, y, w, max_rows, true);
1.1 root 1643: y += max_rows;
1644: h -= max_rows;
1645: }
1646:
1647: dh = MIN(VNC_TIGHT_MAX_SPLIT_TILE_SIZE, (y + h - dy));
1648:
1649: for (dx = x; dx < x + w; dx += VNC_TIGHT_MAX_SPLIT_TILE_SIZE) {
1650: uint32_t color_value;
1651: int x_best, y_best, w_best, h_best;
1652:
1653: dw = MIN(VNC_TIGHT_MAX_SPLIT_TILE_SIZE, (x + w - dx));
1654:
1655: if (!check_solid_tile(vs, dx, dy, dw, dh, &color_value, false)) {
1656: continue ;
1657: }
1658:
1659: /* Get dimensions of solid-color area. */
1660:
1661: find_best_solid_area(vs, dx, dy, w - (dx - x), h - (dy - y),
1662: color_value, &w_best, &h_best);
1663:
1664: /* Make sure a solid rectangle is large enough
1665: (or the whole rectangle is of the same color). */
1666:
1667: if (w_best * h_best != w * h &&
1668: w_best * h_best < VNC_TIGHT_MIN_SOLID_SUBRECT_SIZE) {
1669: continue;
1670: }
1671:
1672: /* Try to extend solid rectangle to maximum size. */
1673:
1674: x_best = dx; y_best = dy;
1675: extend_solid_area(vs, x, y, w, h, color_value,
1676: &x_best, &y_best, &w_best, &h_best);
1677:
1678: /* Send rectangles at top and left to solid-color area. */
1679:
1680: if (y_best != y) {
1.1.1.4 ! root 1681: n += send_rect_simple(vs, x, y, w, y_best-y, true);
1.1 root 1682: }
1683: if (x_best != x) {
1684: n += tight_send_framebuffer_update(vs, x, y_best,
1685: x_best-x, h_best);
1686: }
1687:
1688: /* Send solid-color rectangle. */
1689: n += send_sub_rect_solid(vs, x_best, y_best, w_best, h_best);
1690:
1691: /* Send remaining rectangles (at right and bottom). */
1692:
1693: if (x_best + w_best != x + w) {
1694: n += tight_send_framebuffer_update(vs, x_best+w_best,
1695: y_best,
1696: w-(x_best-x)-w_best,
1697: h_best);
1698: }
1699: if (y_best + h_best != y + h) {
1700: n += tight_send_framebuffer_update(vs, x, y_best+h_best,
1701: w, h-(y_best-y)-h_best);
1702: }
1703:
1704: /* Return after all recursive calls are done. */
1705: return n;
1706: }
1707: }
1.1.1.4 ! root 1708: return n + send_rect_simple(vs, x, y, w, h, true);
1.1 root 1709: }
1710:
1711: static int tight_send_framebuffer_update(VncState *vs, int x, int y,
1712: int w, int h)
1713: {
1714: int max_rows;
1715:
1716: if (vs->clientds.pf.bytes_per_pixel == 4 && vs->clientds.pf.rmax == 0xFF &&
1717: vs->clientds.pf.bmax == 0xFF && vs->clientds.pf.gmax == 0xFF) {
1718: vs->tight.pixel24 = true;
1719: } else {
1720: vs->tight.pixel24 = false;
1721: }
1722:
1.1.1.4 ! root 1723: #ifdef CONFIG_VNC_JPEG
! 1724: if (vs->tight.quality != (uint8_t)-1) {
! 1725: double freq = vnc_update_freq(vs, x, y, w, h);
! 1726:
! 1727: if (freq > tight_jpeg_conf[vs->tight.quality].jpeg_freq_threshold) {
! 1728: return send_rect_simple(vs, x, y, w, h, false);
! 1729: }
! 1730: }
! 1731: #endif
! 1732:
! 1733: if (w * h < VNC_TIGHT_MIN_SPLIT_RECT_SIZE) {
! 1734: return send_rect_simple(vs, x, y, w, h, true);
! 1735: }
1.1 root 1736:
1737: /* Calculate maximum number of rows in one non-solid rectangle. */
1738:
1739: max_rows = tight_conf[vs->tight.compression].max_rect_size;
1740: max_rows /= MIN(tight_conf[vs->tight.compression].max_rect_width, w);
1741:
1742: return find_large_solid_color_rect(vs, x, y, w, h, max_rows);
1743: }
1744:
1745: int vnc_tight_send_framebuffer_update(VncState *vs, int x, int y,
1746: int w, int h)
1747: {
1748: vs->tight.type = VNC_ENCODING_TIGHT;
1749: return tight_send_framebuffer_update(vs, x, y, w, h);
1750: }
1751:
1752: int vnc_tight_png_send_framebuffer_update(VncState *vs, int x, int y,
1753: int w, int h)
1754: {
1755: vs->tight.type = VNC_ENCODING_TIGHT_PNG;
1756: return tight_send_framebuffer_update(vs, x, y, w, h);
1757: }
1758:
1759: void vnc_tight_clear(VncState *vs)
1760: {
1761: int i;
1762: for (i=0; i<ARRAY_SIZE(vs->tight.stream); i++) {
1763: if (vs->tight.stream[i].opaque) {
1764: deflateEnd(&vs->tight.stream[i]);
1765: }
1766: }
1767:
1768: buffer_free(&vs->tight.tight);
1769: buffer_free(&vs->tight.zlib);
1770: buffer_free(&vs->tight.gradient);
1771: #ifdef CONFIG_VNC_JPEG
1772: buffer_free(&vs->tight.jpeg);
1773: #endif
1774: #ifdef CONFIG_VNC_PNG
1775: buffer_free(&vs->tight.png);
1776: #endif
1777: }
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