Corentin Chary | 380282b | 2010-05-19 09:24:10 +0200 | [diff] [blame] | 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 | |
Corentin Chary | 2f6f5c7 | 2010-07-07 20:57:49 +0200 | [diff] [blame] | 29 | #include "qemu-common.h" |
| 30 | |
| 31 | #ifdef CONFIG_VNC_JPEG |
| 32 | #include <stdio.h> |
| 33 | #include <jpeglib.h> |
| 34 | #endif |
| 35 | |
| 36 | #include "bswap.h" |
Corentin Chary | aa7d73f | 2010-05-19 09:24:12 +0200 | [diff] [blame] | 37 | #include "qdict.h" |
| 38 | #include "qint.h" |
Corentin Chary | 380282b | 2010-05-19 09:24:10 +0200 | [diff] [blame] | 39 | #include "vnc.h" |
Corentin Chary | 245f7b5 | 2010-07-07 20:57:53 +0200 | [diff] [blame^] | 40 | #include "vnc-enc-tight.h" |
Corentin Chary | 380282b | 2010-05-19 09:24:10 +0200 | [diff] [blame] | 41 | |
| 42 | /* Compression level stuff. The following array contains various |
| 43 | encoder parameters for each of 10 compression levels (0..9). |
| 44 | Last three parameters correspond to JPEG quality levels (0..9). */ |
| 45 | |
| 46 | static const struct { |
| 47 | int max_rect_size, max_rect_width; |
| 48 | int mono_min_rect_size, gradient_min_rect_size; |
| 49 | int idx_zlib_level, mono_zlib_level, raw_zlib_level, gradient_zlib_level; |
| 50 | int gradient_threshold, gradient_threshold24; |
| 51 | int idx_max_colors_divisor; |
| 52 | int jpeg_quality, jpeg_threshold, jpeg_threshold24; |
| 53 | } tight_conf[] = { |
| 54 | { 512, 32, 6, 65536, 0, 0, 0, 0, 0, 0, 4, 5, 10000, 23000 }, |
| 55 | { 2048, 128, 6, 65536, 1, 1, 1, 0, 0, 0, 8, 10, 8000, 18000 }, |
| 56 | { 6144, 256, 8, 65536, 3, 3, 2, 0, 0, 0, 24, 15, 6500, 15000 }, |
| 57 | { 10240, 1024, 12, 65536, 5, 5, 3, 0, 0, 0, 32, 25, 5000, 12000 }, |
| 58 | { 16384, 2048, 12, 65536, 6, 6, 4, 0, 0, 0, 32, 37, 4000, 10000 }, |
| 59 | { 32768, 2048, 12, 4096, 7, 7, 5, 4, 150, 380, 32, 50, 3000, 8000 }, |
| 60 | { 65536, 2048, 16, 4096, 7, 7, 6, 4, 170, 420, 48, 60, 2000, 5000 }, |
| 61 | { 65536, 2048, 16, 4096, 8, 8, 7, 5, 180, 450, 64, 70, 1000, 2500 }, |
| 62 | { 65536, 2048, 32, 8192, 9, 9, 8, 6, 190, 475, 64, 75, 500, 1200 }, |
| 63 | { 65536, 2048, 32, 8192, 9, 9, 9, 6, 200, 500, 96, 80, 200, 500 } |
| 64 | }; |
| 65 | |
Corentin Chary | b4bea3f | 2010-05-19 09:24:11 +0200 | [diff] [blame] | 66 | /* |
Corentin Chary | 2f6f5c7 | 2010-07-07 20:57:49 +0200 | [diff] [blame] | 67 | * Code to guess if given rectangle is suitable for smooth image |
| 68 | * compression (by applying "gradient" filter or JPEG coder). |
| 69 | */ |
| 70 | |
| 71 | static uint |
| 72 | tight_detect_smooth_image24(VncState *vs, int w, int h) |
| 73 | { |
| 74 | int off; |
| 75 | int x, y, d, dx; |
| 76 | uint c; |
| 77 | uint stats[256]; |
| 78 | int pixels = 0; |
| 79 | int pix, left[3]; |
| 80 | uint errors; |
| 81 | unsigned char *buf = vs->tight.buffer; |
| 82 | |
| 83 | /* |
| 84 | * If client is big-endian, color samples begin from the second |
| 85 | * byte (offset 1) of a 32-bit pixel value. |
| 86 | */ |
| 87 | off = !!(vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG); |
| 88 | |
| 89 | memset(stats, 0, sizeof (stats)); |
| 90 | |
| 91 | for (y = 0, x = 0; y < h && x < w;) { |
| 92 | for (d = 0; d < h - y && d < w - x - VNC_TIGHT_DETECT_SUBROW_WIDTH; |
| 93 | d++) { |
| 94 | for (c = 0; c < 3; c++) { |
| 95 | left[c] = buf[((y+d)*w+x+d)*4+off+c] & 0xFF; |
| 96 | } |
| 97 | for (dx = 1; dx <= VNC_TIGHT_DETECT_SUBROW_WIDTH; dx++) { |
| 98 | for (c = 0; c < 3; c++) { |
| 99 | pix = buf[((y+d)*w+x+d+dx)*4+off+c] & 0xFF; |
| 100 | stats[abs(pix - left[c])]++; |
| 101 | left[c] = pix; |
| 102 | } |
| 103 | pixels++; |
| 104 | } |
| 105 | } |
| 106 | if (w > h) { |
| 107 | x += h; |
| 108 | y = 0; |
| 109 | } else { |
| 110 | x = 0; |
| 111 | y += w; |
| 112 | } |
| 113 | } |
| 114 | |
| 115 | /* 95% smooth or more ... */ |
| 116 | if (stats[0] * 33 / pixels >= 95) { |
| 117 | return 0; |
| 118 | } |
| 119 | |
| 120 | errors = 0; |
| 121 | for (c = 1; c < 8; c++) { |
| 122 | errors += stats[c] * (c * c); |
| 123 | if (stats[c] == 0 || stats[c] > stats[c-1] * 2) { |
| 124 | return 0; |
| 125 | } |
| 126 | } |
| 127 | for (; c < 256; c++) { |
| 128 | errors += stats[c] * (c * c); |
| 129 | } |
| 130 | errors /= (pixels * 3 - stats[0]); |
| 131 | |
| 132 | return errors; |
| 133 | } |
| 134 | |
| 135 | #define DEFINE_DETECT_FUNCTION(bpp) \ |
| 136 | \ |
| 137 | static uint \ |
| 138 | tight_detect_smooth_image##bpp(VncState *vs, int w, int h) { \ |
| 139 | bool endian; \ |
| 140 | uint##bpp##_t pix; \ |
| 141 | int max[3], shift[3]; \ |
| 142 | int x, y, d, dx; \ |
| 143 | uint c; \ |
| 144 | uint stats[256]; \ |
| 145 | int pixels = 0; \ |
| 146 | int sample, sum, left[3]; \ |
| 147 | uint errors; \ |
| 148 | unsigned char *buf = vs->tight.buffer; \ |
| 149 | \ |
| 150 | endian = ((vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG) != \ |
| 151 | (vs->ds->surface->flags & QEMU_BIG_ENDIAN_FLAG)); \ |
| 152 | \ |
| 153 | \ |
| 154 | max[0] = vs->clientds.pf.rmax; \ |
| 155 | max[1] = vs->clientds.pf.gmax; \ |
| 156 | max[2] = vs->clientds.pf.bmax; \ |
| 157 | shift[0] = vs->clientds.pf.rshift; \ |
| 158 | shift[1] = vs->clientds.pf.gshift; \ |
| 159 | shift[2] = vs->clientds.pf.bshift; \ |
| 160 | \ |
| 161 | memset(stats, 0, sizeof(stats)); \ |
| 162 | \ |
| 163 | y = 0, x = 0; \ |
| 164 | while (y < h && x < w) { \ |
| 165 | for (d = 0; d < h - y && \ |
| 166 | d < w - x - VNC_TIGHT_DETECT_SUBROW_WIDTH; d++) { \ |
| 167 | pix = ((uint##bpp##_t *)buf)[(y+d)*w+x+d]; \ |
| 168 | if (endian) { \ |
| 169 | pix = bswap_##bpp(pix); \ |
| 170 | } \ |
| 171 | for (c = 0; c < 3; c++) { \ |
| 172 | left[c] = (int)(pix >> shift[c] & max[c]); \ |
| 173 | } \ |
| 174 | for (dx = 1; dx <= VNC_TIGHT_DETECT_SUBROW_WIDTH; \ |
| 175 | dx++) { \ |
| 176 | pix = ((uint##bpp##_t *)buf)[(y+d)*w+x+d+dx]; \ |
| 177 | if (endian) { \ |
| 178 | pix = bswap_##bpp(pix); \ |
| 179 | } \ |
| 180 | sum = 0; \ |
| 181 | for (c = 0; c < 3; c++) { \ |
| 182 | sample = (int)(pix >> shift[c] & max[c]); \ |
| 183 | sum += abs(sample - left[c]); \ |
| 184 | left[c] = sample; \ |
| 185 | } \ |
| 186 | if (sum > 255) { \ |
| 187 | sum = 255; \ |
| 188 | } \ |
| 189 | stats[sum]++; \ |
| 190 | pixels++; \ |
| 191 | } \ |
| 192 | } \ |
| 193 | if (w > h) { \ |
| 194 | x += h; \ |
| 195 | y = 0; \ |
| 196 | } else { \ |
| 197 | x = 0; \ |
| 198 | y += w; \ |
| 199 | } \ |
| 200 | } \ |
| 201 | \ |
| 202 | if ((stats[0] + stats[1]) * 100 / pixels >= 90) { \ |
| 203 | return 0; \ |
| 204 | } \ |
| 205 | \ |
| 206 | errors = 0; \ |
| 207 | for (c = 1; c < 8; c++) { \ |
| 208 | errors += stats[c] * (c * c); \ |
| 209 | if (stats[c] == 0 || stats[c] > stats[c-1] * 2) { \ |
| 210 | return 0; \ |
| 211 | } \ |
| 212 | } \ |
| 213 | for (; c < 256; c++) { \ |
| 214 | errors += stats[c] * (c * c); \ |
| 215 | } \ |
| 216 | errors /= (pixels - stats[0]); \ |
| 217 | \ |
| 218 | return errors; \ |
| 219 | } |
| 220 | |
| 221 | DEFINE_DETECT_FUNCTION(16) |
| 222 | DEFINE_DETECT_FUNCTION(32) |
| 223 | |
| 224 | static int |
| 225 | tight_detect_smooth_image(VncState *vs, int w, int h) |
| 226 | { |
| 227 | uint errors; |
| 228 | int compression = vs->tight_compression; |
| 229 | int quality = vs->tight_quality; |
| 230 | |
Corentin Chary | 6f9c78c | 2010-07-07 20:57:51 +0200 | [diff] [blame] | 231 | if (!vs->vd->lossy) { |
| 232 | return 0; |
| 233 | } |
| 234 | |
Corentin Chary | 2f6f5c7 | 2010-07-07 20:57:49 +0200 | [diff] [blame] | 235 | if (ds_get_bytes_per_pixel(vs->ds) == 1 || |
| 236 | vs->clientds.pf.bytes_per_pixel == 1 || |
| 237 | w < VNC_TIGHT_DETECT_MIN_WIDTH || h < VNC_TIGHT_DETECT_MIN_HEIGHT) { |
| 238 | return 0; |
| 239 | } |
| 240 | |
| 241 | if (vs->tight_quality != -1) { |
| 242 | if (w * h < VNC_TIGHT_JPEG_MIN_RECT_SIZE) { |
| 243 | return 0; |
| 244 | } |
| 245 | } else { |
| 246 | if (w * h < tight_conf[compression].gradient_min_rect_size) { |
| 247 | return 0; |
| 248 | } |
| 249 | } |
| 250 | |
| 251 | if (vs->clientds.pf.bytes_per_pixel == 4) { |
| 252 | if (vs->tight_pixel24) { |
| 253 | errors = tight_detect_smooth_image24(vs, w, h); |
| 254 | if (vs->tight_quality != -1) { |
| 255 | return (errors < tight_conf[quality].jpeg_threshold24); |
| 256 | } |
| 257 | return (errors < tight_conf[compression].gradient_threshold24); |
| 258 | } else { |
| 259 | errors = tight_detect_smooth_image32(vs, w, h); |
| 260 | } |
| 261 | } else { |
| 262 | errors = tight_detect_smooth_image16(vs, w, h); |
| 263 | } |
| 264 | if (quality != -1) { |
| 265 | return (errors < tight_conf[quality].jpeg_threshold); |
| 266 | } |
| 267 | return (errors < tight_conf[compression].gradient_threshold); |
| 268 | } |
| 269 | |
| 270 | /* |
Corentin Chary | aa7d73f | 2010-05-19 09:24:12 +0200 | [diff] [blame] | 271 | * Code to determine how many different colors used in rectangle. |
| 272 | */ |
| 273 | |
| 274 | static void tight_palette_rgb2buf(uint32_t rgb, int bpp, uint8_t buf[6]) |
| 275 | { |
| 276 | memset(buf, 0, 6); |
| 277 | |
| 278 | if (bpp == 32) { |
| 279 | buf[0] = ((rgb >> 24) & 0xFF); |
| 280 | buf[1] = ((rgb >> 16) & 0xFF); |
| 281 | buf[2] = ((rgb >> 8) & 0xFF); |
| 282 | buf[3] = ((rgb >> 0) & 0xFF); |
| 283 | buf[4] = ((buf[0] & 1) == 0) << 3 | ((buf[1] & 1) == 0) << 2; |
| 284 | buf[4]|= ((buf[2] & 1) == 0) << 1 | ((buf[3] & 1) == 0) << 0; |
| 285 | buf[0] |= 1; |
| 286 | buf[1] |= 1; |
| 287 | buf[2] |= 1; |
| 288 | buf[3] |= 1; |
| 289 | } |
| 290 | if (bpp == 16) { |
| 291 | buf[0] = ((rgb >> 8) & 0xFF); |
| 292 | buf[1] = ((rgb >> 0) & 0xFF); |
| 293 | buf[2] = ((buf[0] & 1) == 0) << 1 | ((buf[1] & 1) == 0) << 0; |
| 294 | buf[0] |= 1; |
| 295 | buf[1] |= 1; |
| 296 | } |
| 297 | } |
| 298 | |
| 299 | static uint32_t tight_palette_buf2rgb(int bpp, const uint8_t *buf) |
| 300 | { |
| 301 | uint32_t rgb = 0; |
| 302 | |
| 303 | if (bpp == 32) { |
| 304 | rgb |= ((buf[0] & ~1) | !((buf[4] >> 3) & 1)) << 24; |
| 305 | rgb |= ((buf[1] & ~1) | !((buf[4] >> 2) & 1)) << 16; |
| 306 | rgb |= ((buf[2] & ~1) | !((buf[4] >> 1) & 1)) << 8; |
| 307 | rgb |= ((buf[3] & ~1) | !((buf[4] >> 0) & 1)) << 0; |
| 308 | } |
| 309 | if (bpp == 16) { |
| 310 | rgb |= ((buf[0] & ~1) | !((buf[2] >> 1) & 1)) << 8; |
| 311 | rgb |= ((buf[1] & ~1) | !((buf[2] >> 0) & 1)) << 0; |
| 312 | } |
| 313 | return rgb; |
| 314 | } |
| 315 | |
| 316 | |
| 317 | static int tight_palette_insert(QDict *palette, uint32_t rgb, int bpp, int max) |
| 318 | { |
| 319 | uint8_t key[6]; |
| 320 | int idx = qdict_size(palette); |
| 321 | bool present; |
| 322 | |
| 323 | tight_palette_rgb2buf(rgb, bpp, key); |
| 324 | present = qdict_haskey(palette, (char *)key); |
| 325 | if (idx >= max && !present) { |
| 326 | return 0; |
| 327 | } |
| 328 | if (!present) { |
| 329 | qdict_put(palette, (char *)key, qint_from_int(idx)); |
| 330 | } |
| 331 | return qdict_size(palette); |
| 332 | } |
| 333 | |
| 334 | #define DEFINE_FILL_PALETTE_FUNCTION(bpp) \ |
| 335 | \ |
| 336 | static int \ |
| 337 | tight_fill_palette##bpp(VncState *vs, int x, int y, \ |
| 338 | int max, size_t count, \ |
| 339 | uint32_t *bg, uint32_t *fg, \ |
| 340 | struct QDict **palette) { \ |
| 341 | uint##bpp##_t *data; \ |
| 342 | uint##bpp##_t c0, c1, ci; \ |
| 343 | int i, n0, n1; \ |
| 344 | \ |
| 345 | data = (uint##bpp##_t *)vs->tight.buffer; \ |
| 346 | \ |
| 347 | c0 = data[0]; \ |
| 348 | i = 1; \ |
| 349 | while (i < count && data[i] == c0) \ |
| 350 | i++; \ |
| 351 | if (i >= count) { \ |
| 352 | *bg = *fg = c0; \ |
| 353 | return 1; \ |
| 354 | } \ |
| 355 | \ |
| 356 | if (max < 2) { \ |
| 357 | return 0; \ |
| 358 | } \ |
| 359 | \ |
| 360 | n0 = i; \ |
| 361 | c1 = data[i]; \ |
| 362 | n1 = 0; \ |
| 363 | for (i++; i < count; i++) { \ |
| 364 | ci = data[i]; \ |
| 365 | if (ci == c0) { \ |
| 366 | n0++; \ |
| 367 | } else if (ci == c1) { \ |
| 368 | n1++; \ |
| 369 | } else \ |
| 370 | break; \ |
| 371 | } \ |
| 372 | if (i >= count) { \ |
| 373 | if (n0 > n1) { \ |
| 374 | *bg = (uint32_t)c0; \ |
| 375 | *fg = (uint32_t)c1; \ |
| 376 | } else { \ |
| 377 | *bg = (uint32_t)c1; \ |
| 378 | *fg = (uint32_t)c0; \ |
| 379 | } \ |
| 380 | return 2; \ |
| 381 | } \ |
| 382 | \ |
| 383 | if (max == 2) { \ |
| 384 | return 0; \ |
| 385 | } \ |
| 386 | \ |
| 387 | *palette = qdict_new(); \ |
| 388 | tight_palette_insert(*palette, c0, bpp, max); \ |
| 389 | tight_palette_insert(*palette, c1, bpp, max); \ |
Corentin Chary | 270ec21 | 2010-06-01 23:05:43 +0200 | [diff] [blame] | 390 | tight_palette_insert(*palette, ci, bpp, max); \ |
Corentin Chary | aa7d73f | 2010-05-19 09:24:12 +0200 | [diff] [blame] | 391 | \ |
| 392 | for (i++; i < count; i++) { \ |
| 393 | if (data[i] == ci) { \ |
| 394 | continue; \ |
| 395 | } else { \ |
| 396 | if (!tight_palette_insert(*palette, (uint32_t)ci, \ |
| 397 | bpp, max)) { \ |
| 398 | return 0; \ |
| 399 | } \ |
| 400 | ci = data[i]; \ |
| 401 | } \ |
| 402 | } \ |
| 403 | \ |
| 404 | return qdict_size(*palette); \ |
| 405 | } |
| 406 | |
| 407 | DEFINE_FILL_PALETTE_FUNCTION(8) |
| 408 | DEFINE_FILL_PALETTE_FUNCTION(16) |
| 409 | DEFINE_FILL_PALETTE_FUNCTION(32) |
| 410 | |
| 411 | static int tight_fill_palette(VncState *vs, int x, int y, |
| 412 | size_t count, uint32_t *bg, uint32_t *fg, |
| 413 | struct QDict **palette) |
| 414 | { |
| 415 | int max; |
| 416 | |
| 417 | max = count / tight_conf[vs->tight_compression].idx_max_colors_divisor; |
| 418 | if (max < 2 && |
| 419 | count >= tight_conf[vs->tight_compression].mono_min_rect_size) { |
| 420 | max = 2; |
| 421 | } |
| 422 | if (max >= 256) { |
| 423 | max = 256; |
| 424 | } |
| 425 | |
| 426 | switch(vs->clientds.pf.bytes_per_pixel) { |
| 427 | case 4: |
| 428 | return tight_fill_palette32(vs, x, y, max, count, bg, fg, palette); |
| 429 | case 2: |
| 430 | return tight_fill_palette16(vs, x, y, max, count, bg, fg, palette); |
| 431 | default: |
| 432 | max = 2; |
| 433 | return tight_fill_palette8(vs, x, y, max, count, bg, fg, palette); |
| 434 | } |
| 435 | return 0; |
| 436 | } |
| 437 | |
| 438 | /* Callback to dump a palette with qdict_iter |
| 439 | static void print_palette(const char *key, QObject *obj, void *opaque) |
| 440 | { |
| 441 | uint8_t idx = qint_get_int(qobject_to_qint(obj)); |
| 442 | uint32_t rgb = tight_palette_buf2rgb(32, (uint8_t *)key); |
| 443 | |
| 444 | fprintf(stderr, "%.2x ", (unsigned char)*key); |
| 445 | while (*key++) |
| 446 | fprintf(stderr, "%.2x ", (unsigned char)*key); |
| 447 | |
| 448 | fprintf(stderr, ": idx: %x rgb: %x\n", idx, rgb); |
| 449 | } |
| 450 | */ |
| 451 | |
| 452 | /* |
| 453 | * Converting truecolor samples into palette indices. |
| 454 | */ |
| 455 | #define DEFINE_IDX_ENCODE_FUNCTION(bpp) \ |
| 456 | \ |
| 457 | static void \ |
| 458 | tight_encode_indexed_rect##bpp(uint8_t *buf, int count, \ |
| 459 | struct QDict *palette) { \ |
| 460 | uint##bpp##_t *src; \ |
| 461 | uint##bpp##_t rgb; \ |
| 462 | uint8_t key[6]; \ |
Corentin Chary | 54d43ea | 2010-06-01 23:05:42 +0200 | [diff] [blame] | 463 | int i, rep; \ |
Corentin Chary | aa7d73f | 2010-05-19 09:24:12 +0200 | [diff] [blame] | 464 | uint8_t idx; \ |
| 465 | \ |
| 466 | src = (uint##bpp##_t *) buf; \ |
| 467 | \ |
Corentin Chary | 54d43ea | 2010-06-01 23:05:42 +0200 | [diff] [blame] | 468 | for (i = 0; i < count; i++) { \ |
Corentin Chary | aa7d73f | 2010-05-19 09:24:12 +0200 | [diff] [blame] | 469 | rgb = *src++; \ |
| 470 | rep = 0; \ |
Corentin Chary | 54d43ea | 2010-06-01 23:05:42 +0200 | [diff] [blame] | 471 | while (i < count && *src == rgb) { \ |
| 472 | rep++, src++, i++; \ |
Corentin Chary | aa7d73f | 2010-05-19 09:24:12 +0200 | [diff] [blame] | 473 | } \ |
| 474 | tight_palette_rgb2buf(rgb, bpp, key); \ |
| 475 | if (!qdict_haskey(palette, (char *)key)) { \ |
| 476 | /* \ |
| 477 | * Should never happen, but don't break everything \ |
| 478 | * if it does, use the first color instead \ |
| 479 | */ \ |
| 480 | idx = 0; \ |
| 481 | } else { \ |
| 482 | idx = qdict_get_int(palette, (char *)key); \ |
| 483 | } \ |
| 484 | while (rep >= 0) { \ |
| 485 | *buf++ = idx; \ |
| 486 | rep--; \ |
| 487 | } \ |
| 488 | } \ |
| 489 | } |
| 490 | |
| 491 | DEFINE_IDX_ENCODE_FUNCTION(16) |
| 492 | DEFINE_IDX_ENCODE_FUNCTION(32) |
| 493 | |
| 494 | #define DEFINE_MONO_ENCODE_FUNCTION(bpp) \ |
| 495 | \ |
| 496 | static void \ |
| 497 | tight_encode_mono_rect##bpp(uint8_t *buf, int w, int h, \ |
| 498 | uint##bpp##_t bg, uint##bpp##_t fg) { \ |
| 499 | uint##bpp##_t *ptr; \ |
| 500 | unsigned int value, mask; \ |
| 501 | int aligned_width; \ |
| 502 | int x, y, bg_bits; \ |
| 503 | \ |
| 504 | ptr = (uint##bpp##_t *) buf; \ |
| 505 | aligned_width = w - w % 8; \ |
| 506 | \ |
| 507 | for (y = 0; y < h; y++) { \ |
| 508 | for (x = 0; x < aligned_width; x += 8) { \ |
| 509 | for (bg_bits = 0; bg_bits < 8; bg_bits++) { \ |
| 510 | if (*ptr++ != bg) { \ |
| 511 | break; \ |
| 512 | } \ |
| 513 | } \ |
| 514 | if (bg_bits == 8) { \ |
| 515 | *buf++ = 0; \ |
| 516 | continue; \ |
| 517 | } \ |
| 518 | mask = 0x80 >> bg_bits; \ |
| 519 | value = mask; \ |
| 520 | for (bg_bits++; bg_bits < 8; bg_bits++) { \ |
| 521 | mask >>= 1; \ |
| 522 | if (*ptr++ != bg) { \ |
| 523 | value |= mask; \ |
| 524 | } \ |
| 525 | } \ |
| 526 | *buf++ = (uint8_t)value; \ |
| 527 | } \ |
| 528 | \ |
| 529 | mask = 0x80; \ |
| 530 | value = 0; \ |
| 531 | if (x >= w) { \ |
| 532 | continue; \ |
| 533 | } \ |
| 534 | \ |
| 535 | for (; x < w; x++) { \ |
| 536 | if (*ptr++ != bg) { \ |
| 537 | value |= mask; \ |
| 538 | } \ |
| 539 | mask >>= 1; \ |
| 540 | } \ |
| 541 | *buf++ = (uint8_t)value; \ |
| 542 | } \ |
| 543 | } |
| 544 | |
| 545 | DEFINE_MONO_ENCODE_FUNCTION(8) |
| 546 | DEFINE_MONO_ENCODE_FUNCTION(16) |
| 547 | DEFINE_MONO_ENCODE_FUNCTION(32) |
| 548 | |
| 549 | /* |
Corentin Chary | 2f6f5c7 | 2010-07-07 20:57:49 +0200 | [diff] [blame] | 550 | * ``Gradient'' filter for 24-bit color samples. |
| 551 | * Should be called only when redMax, greenMax and blueMax are 255. |
| 552 | * Color components assumed to be byte-aligned. |
| 553 | */ |
| 554 | |
| 555 | static void |
| 556 | tight_filter_gradient24(VncState *vs, uint8_t *buf, int w, int h) |
| 557 | { |
| 558 | uint32_t *buf32; |
| 559 | uint32_t pix32; |
| 560 | int shift[3]; |
| 561 | int *prev; |
| 562 | int here[3], upper[3], left[3], upperleft[3]; |
| 563 | int prediction; |
| 564 | int x, y, c; |
| 565 | |
| 566 | buf32 = (uint32_t *)buf; |
| 567 | memset(vs->tight_gradient.buffer, 0, w * 3 * sizeof(int)); |
| 568 | |
| 569 | if ((vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG) == |
| 570 | (vs->ds->surface->flags & QEMU_BIG_ENDIAN_FLAG)) { |
| 571 | shift[0] = vs->clientds.pf.rshift; |
| 572 | shift[1] = vs->clientds.pf.gshift; |
| 573 | shift[2] = vs->clientds.pf.bshift; |
| 574 | } else { |
| 575 | shift[0] = 24 - vs->clientds.pf.rshift; |
| 576 | shift[1] = 24 - vs->clientds.pf.gshift; |
| 577 | shift[2] = 24 - vs->clientds.pf.bshift; |
| 578 | } |
| 579 | |
| 580 | for (y = 0; y < h; y++) { |
| 581 | for (c = 0; c < 3; c++) { |
| 582 | upper[c] = 0; |
| 583 | here[c] = 0; |
| 584 | } |
| 585 | prev = (int *)vs->tight_gradient.buffer; |
| 586 | for (x = 0; x < w; x++) { |
| 587 | pix32 = *buf32++; |
| 588 | for (c = 0; c < 3; c++) { |
| 589 | upperleft[c] = upper[c]; |
| 590 | left[c] = here[c]; |
| 591 | upper[c] = *prev; |
| 592 | here[c] = (int)(pix32 >> shift[c] & 0xFF); |
| 593 | *prev++ = here[c]; |
| 594 | |
| 595 | prediction = left[c] + upper[c] - upperleft[c]; |
| 596 | if (prediction < 0) { |
| 597 | prediction = 0; |
| 598 | } else if (prediction > 0xFF) { |
| 599 | prediction = 0xFF; |
| 600 | } |
| 601 | *buf++ = (char)(here[c] - prediction); |
| 602 | } |
| 603 | } |
| 604 | } |
| 605 | } |
| 606 | |
| 607 | |
| 608 | /* |
| 609 | * ``Gradient'' filter for other color depths. |
| 610 | */ |
| 611 | |
| 612 | #define DEFINE_GRADIENT_FILTER_FUNCTION(bpp) \ |
| 613 | \ |
| 614 | static void \ |
| 615 | tight_filter_gradient##bpp(VncState *vs, uint##bpp##_t *buf, \ |
| 616 | int w, int h) { \ |
| 617 | uint##bpp##_t pix, diff; \ |
| 618 | bool endian; \ |
| 619 | int *prev; \ |
| 620 | int max[3], shift[3]; \ |
| 621 | int here[3], upper[3], left[3], upperleft[3]; \ |
| 622 | int prediction; \ |
| 623 | int x, y, c; \ |
| 624 | \ |
| 625 | memset (vs->tight_gradient.buffer, 0, w * 3 * sizeof(int)); \ |
| 626 | \ |
| 627 | endian = ((vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG) != \ |
| 628 | (vs->ds->surface->flags & QEMU_BIG_ENDIAN_FLAG)); \ |
| 629 | \ |
| 630 | max[0] = vs->clientds.pf.rmax; \ |
| 631 | max[1] = vs->clientds.pf.gmax; \ |
| 632 | max[2] = vs->clientds.pf.bmax; \ |
| 633 | shift[0] = vs->clientds.pf.rshift; \ |
| 634 | shift[1] = vs->clientds.pf.gshift; \ |
| 635 | shift[2] = vs->clientds.pf.bshift; \ |
| 636 | \ |
| 637 | for (y = 0; y < h; y++) { \ |
| 638 | for (c = 0; c < 3; c++) { \ |
| 639 | upper[c] = 0; \ |
| 640 | here[c] = 0; \ |
| 641 | } \ |
| 642 | prev = (int *)vs->tight_gradient.buffer; \ |
| 643 | for (x = 0; x < w; x++) { \ |
| 644 | pix = *buf; \ |
| 645 | if (endian) { \ |
| 646 | pix = bswap_##bpp(pix); \ |
| 647 | } \ |
| 648 | diff = 0; \ |
| 649 | for (c = 0; c < 3; c++) { \ |
| 650 | upperleft[c] = upper[c]; \ |
| 651 | left[c] = here[c]; \ |
| 652 | upper[c] = *prev; \ |
| 653 | here[c] = (int)(pix >> shift[c] & max[c]); \ |
| 654 | *prev++ = here[c]; \ |
| 655 | \ |
| 656 | prediction = left[c] + upper[c] - upperleft[c]; \ |
| 657 | if (prediction < 0) { \ |
| 658 | prediction = 0; \ |
| 659 | } else if (prediction > max[c]) { \ |
| 660 | prediction = max[c]; \ |
| 661 | } \ |
| 662 | diff |= ((here[c] - prediction) & max[c]) \ |
| 663 | << shift[c]; \ |
| 664 | } \ |
| 665 | if (endian) { \ |
| 666 | diff = bswap_##bpp(diff); \ |
| 667 | } \ |
| 668 | *buf++ = diff; \ |
| 669 | } \ |
| 670 | } \ |
| 671 | } |
| 672 | |
| 673 | DEFINE_GRADIENT_FILTER_FUNCTION(16) |
| 674 | DEFINE_GRADIENT_FILTER_FUNCTION(32) |
| 675 | |
| 676 | /* |
Corentin Chary | b4bea3f | 2010-05-19 09:24:11 +0200 | [diff] [blame] | 677 | * Check if a rectangle is all of the same color. If needSameColor is |
| 678 | * set to non-zero, then also check that its color equals to the |
| 679 | * *colorPtr value. The result is 1 if the test is successfull, and in |
| 680 | * that case new color will be stored in *colorPtr. |
| 681 | */ |
| 682 | |
| 683 | #define DEFINE_CHECK_SOLID_FUNCTION(bpp) \ |
| 684 | \ |
| 685 | static bool \ |
| 686 | check_solid_tile##bpp(VncState *vs, int x, int y, int w, int h, \ |
| 687 | uint32_t* color, bool samecolor) \ |
| 688 | { \ |
| 689 | VncDisplay *vd = vs->vd; \ |
| 690 | uint##bpp##_t *fbptr; \ |
| 691 | uint##bpp##_t c; \ |
| 692 | int dx, dy; \ |
| 693 | \ |
| 694 | fbptr = (uint##bpp##_t *) \ |
| 695 | (vd->server->data + y * ds_get_linesize(vs->ds) + \ |
| 696 | x * ds_get_bytes_per_pixel(vs->ds)); \ |
| 697 | \ |
| 698 | c = *fbptr; \ |
| 699 | if (samecolor && (uint32_t)c != *color) { \ |
| 700 | return false; \ |
| 701 | } \ |
| 702 | \ |
| 703 | for (dy = 0; dy < h; dy++) { \ |
| 704 | for (dx = 0; dx < w; dx++) { \ |
| 705 | if (c != fbptr[dx]) { \ |
| 706 | return false; \ |
| 707 | } \ |
| 708 | } \ |
| 709 | fbptr = (uint##bpp##_t *) \ |
| 710 | ((uint8_t *)fbptr + ds_get_linesize(vs->ds)); \ |
| 711 | } \ |
| 712 | \ |
| 713 | *color = (uint32_t)c; \ |
| 714 | return true; \ |
| 715 | } |
| 716 | |
| 717 | DEFINE_CHECK_SOLID_FUNCTION(32) |
| 718 | DEFINE_CHECK_SOLID_FUNCTION(16) |
| 719 | DEFINE_CHECK_SOLID_FUNCTION(8) |
| 720 | |
| 721 | static bool check_solid_tile(VncState *vs, int x, int y, int w, int h, |
| 722 | uint32_t* color, bool samecolor) |
| 723 | { |
| 724 | VncDisplay *vd = vs->vd; |
| 725 | |
| 726 | switch(vd->server->pf.bytes_per_pixel) { |
| 727 | case 4: |
| 728 | return check_solid_tile32(vs, x, y, w, h, color, samecolor); |
| 729 | case 2: |
| 730 | return check_solid_tile16(vs, x, y, w, h, color, samecolor); |
| 731 | default: |
| 732 | return check_solid_tile8(vs, x, y, w, h, color, samecolor); |
| 733 | } |
| 734 | } |
| 735 | |
| 736 | static void find_best_solid_area(VncState *vs, int x, int y, int w, int h, |
| 737 | uint32_t color, int *w_ptr, int *h_ptr) |
| 738 | { |
| 739 | int dx, dy, dw, dh; |
| 740 | int w_prev; |
| 741 | int w_best = 0, h_best = 0; |
| 742 | |
| 743 | w_prev = w; |
| 744 | |
| 745 | for (dy = y; dy < y + h; dy += VNC_TIGHT_MAX_SPLIT_TILE_SIZE) { |
| 746 | |
| 747 | dh = MIN(VNC_TIGHT_MAX_SPLIT_TILE_SIZE, y + h - dy); |
| 748 | dw = MIN(VNC_TIGHT_MAX_SPLIT_TILE_SIZE, w_prev); |
| 749 | |
| 750 | if (!check_solid_tile(vs, x, dy, dw, dh, &color, true)) { |
| 751 | break; |
| 752 | } |
| 753 | |
| 754 | for (dx = x + dw; dx < x + w_prev;) { |
| 755 | dw = MIN(VNC_TIGHT_MAX_SPLIT_TILE_SIZE, x + w_prev - dx); |
| 756 | |
| 757 | if (!check_solid_tile(vs, dx, dy, dw, dh, &color, true)) { |
| 758 | break; |
| 759 | } |
| 760 | dx += dw; |
| 761 | } |
| 762 | |
| 763 | w_prev = dx - x; |
| 764 | if (w_prev * (dy + dh - y) > w_best * h_best) { |
| 765 | w_best = w_prev; |
| 766 | h_best = dy + dh - y; |
| 767 | } |
| 768 | } |
| 769 | |
| 770 | *w_ptr = w_best; |
| 771 | *h_ptr = h_best; |
| 772 | } |
| 773 | |
| 774 | static void extend_solid_area(VncState *vs, int x, int y, int w, int h, |
| 775 | uint32_t color, int *x_ptr, int *y_ptr, |
| 776 | int *w_ptr, int *h_ptr) |
| 777 | { |
| 778 | int cx, cy; |
| 779 | |
| 780 | /* Try to extend the area upwards. */ |
| 781 | for ( cy = *y_ptr - 1; |
| 782 | cy >= y && check_solid_tile(vs, *x_ptr, cy, *w_ptr, 1, &color, true); |
| 783 | cy-- ); |
| 784 | *h_ptr += *y_ptr - (cy + 1); |
| 785 | *y_ptr = cy + 1; |
| 786 | |
| 787 | /* ... downwards. */ |
| 788 | for ( cy = *y_ptr + *h_ptr; |
| 789 | cy < y + h && |
| 790 | check_solid_tile(vs, *x_ptr, cy, *w_ptr, 1, &color, true); |
| 791 | cy++ ); |
| 792 | *h_ptr += cy - (*y_ptr + *h_ptr); |
| 793 | |
| 794 | /* ... to the left. */ |
| 795 | for ( cx = *x_ptr - 1; |
| 796 | cx >= x && check_solid_tile(vs, cx, *y_ptr, 1, *h_ptr, &color, true); |
| 797 | cx-- ); |
| 798 | *w_ptr += *x_ptr - (cx + 1); |
| 799 | *x_ptr = cx + 1; |
| 800 | |
| 801 | /* ... to the right. */ |
| 802 | for ( cx = *x_ptr + *w_ptr; |
| 803 | cx < x + w && |
| 804 | check_solid_tile(vs, cx, *y_ptr, 1, *h_ptr, &color, true); |
| 805 | cx++ ); |
| 806 | *w_ptr += cx - (*x_ptr + *w_ptr); |
| 807 | } |
| 808 | |
Corentin Chary | 380282b | 2010-05-19 09:24:10 +0200 | [diff] [blame] | 809 | static int tight_init_stream(VncState *vs, int stream_id, |
| 810 | int level, int strategy) |
| 811 | { |
| 812 | z_streamp zstream = &vs->tight_stream[stream_id]; |
| 813 | |
| 814 | if (zstream->opaque == NULL) { |
| 815 | int err; |
| 816 | |
| 817 | VNC_DEBUG("VNC: TIGHT: initializing zlib stream %d\n", stream_id); |
| 818 | VNC_DEBUG("VNC: TIGHT: opaque = %p | vs = %p\n", zstream->opaque, vs); |
| 819 | zstream->zalloc = vnc_zlib_zalloc; |
| 820 | zstream->zfree = vnc_zlib_zfree; |
| 821 | |
| 822 | err = deflateInit2(zstream, level, Z_DEFLATED, MAX_WBITS, |
| 823 | MAX_MEM_LEVEL, strategy); |
| 824 | |
| 825 | if (err != Z_OK) { |
| 826 | fprintf(stderr, "VNC: error initializing zlib\n"); |
| 827 | return -1; |
| 828 | } |
| 829 | |
| 830 | vs->tight_levels[stream_id] = level; |
| 831 | zstream->opaque = vs; |
| 832 | } |
| 833 | |
| 834 | if (vs->tight_levels[stream_id] != level) { |
| 835 | if (deflateParams(zstream, level, strategy) != Z_OK) { |
| 836 | return -1; |
| 837 | } |
| 838 | vs->tight_levels[stream_id] = level; |
| 839 | } |
| 840 | return 0; |
| 841 | } |
| 842 | |
| 843 | static void tight_send_compact_size(VncState *vs, size_t len) |
| 844 | { |
| 845 | int lpc = 0; |
| 846 | int bytes = 0; |
| 847 | char buf[3] = {0, 0, 0}; |
| 848 | |
| 849 | buf[bytes++] = len & 0x7F; |
| 850 | if (len > 0x7F) { |
| 851 | buf[bytes-1] |= 0x80; |
| 852 | buf[bytes++] = (len >> 7) & 0x7F; |
| 853 | if (len > 0x3FFF) { |
| 854 | buf[bytes-1] |= 0x80; |
| 855 | buf[bytes++] = (len >> 14) & 0xFF; |
| 856 | } |
| 857 | } |
Corentin Chary | b4bea3f | 2010-05-19 09:24:11 +0200 | [diff] [blame] | 858 | for (lpc = 0; lpc < bytes; lpc++) { |
Corentin Chary | 380282b | 2010-05-19 09:24:10 +0200 | [diff] [blame] | 859 | vnc_write_u8(vs, buf[lpc]); |
| 860 | } |
| 861 | } |
| 862 | |
| 863 | static int tight_compress_data(VncState *vs, int stream_id, size_t bytes, |
| 864 | int level, int strategy) |
| 865 | { |
| 866 | z_streamp zstream = &vs->tight_stream[stream_id]; |
| 867 | int previous_out; |
| 868 | |
| 869 | if (bytes < VNC_TIGHT_MIN_TO_COMPRESS) { |
| 870 | vnc_write(vs, vs->tight.buffer, vs->tight.offset); |
| 871 | return bytes; |
| 872 | } |
| 873 | |
| 874 | if (tight_init_stream(vs, stream_id, level, strategy)) { |
| 875 | return -1; |
| 876 | } |
| 877 | |
| 878 | /* reserve memory in output buffer */ |
| 879 | buffer_reserve(&vs->tight_zlib, bytes + 64); |
| 880 | |
| 881 | /* set pointers */ |
| 882 | zstream->next_in = vs->tight.buffer; |
| 883 | zstream->avail_in = vs->tight.offset; |
| 884 | zstream->next_out = vs->tight_zlib.buffer + vs->tight_zlib.offset; |
| 885 | zstream->avail_out = vs->tight_zlib.capacity - vs->tight_zlib.offset; |
| 886 | zstream->data_type = Z_BINARY; |
| 887 | previous_out = zstream->total_out; |
| 888 | |
| 889 | /* start encoding */ |
| 890 | if (deflate(zstream, Z_SYNC_FLUSH) != Z_OK) { |
| 891 | fprintf(stderr, "VNC: error during tight compression\n"); |
| 892 | return -1; |
| 893 | } |
| 894 | |
| 895 | vs->tight_zlib.offset = vs->tight_zlib.capacity - zstream->avail_out; |
| 896 | bytes = zstream->total_out - previous_out; |
| 897 | |
| 898 | tight_send_compact_size(vs, bytes); |
| 899 | vnc_write(vs, vs->tight_zlib.buffer, bytes); |
| 900 | |
| 901 | buffer_reset(&vs->tight_zlib); |
| 902 | |
| 903 | return bytes; |
| 904 | } |
| 905 | |
| 906 | /* |
| 907 | * Subencoding implementations. |
| 908 | */ |
Corentin Chary | aa7d73f | 2010-05-19 09:24:12 +0200 | [diff] [blame] | 909 | static void tight_pack24(VncState *vs, uint8_t *buf, size_t count, size_t *ret) |
Corentin Chary | 380282b | 2010-05-19 09:24:10 +0200 | [diff] [blame] | 910 | { |
Corentin Chary | 380282b | 2010-05-19 09:24:10 +0200 | [diff] [blame] | 911 | uint32_t *buf32; |
| 912 | uint32_t pix; |
| 913 | int rshift, gshift, bshift; |
| 914 | |
Corentin Chary | 380282b | 2010-05-19 09:24:10 +0200 | [diff] [blame] | 915 | buf32 = (uint32_t *)buf; |
| 916 | |
| 917 | if ((vs->clientds.flags & QEMU_BIG_ENDIAN_FLAG) == |
| 918 | (vs->ds->surface->flags & QEMU_BIG_ENDIAN_FLAG)) { |
| 919 | rshift = vs->clientds.pf.rshift; |
| 920 | gshift = vs->clientds.pf.gshift; |
| 921 | bshift = vs->clientds.pf.bshift; |
| 922 | } else { |
| 923 | rshift = 24 - vs->clientds.pf.rshift; |
| 924 | gshift = 24 - vs->clientds.pf.gshift; |
| 925 | bshift = 24 - vs->clientds.pf.bshift; |
| 926 | } |
| 927 | |
Corentin Chary | aa7d73f | 2010-05-19 09:24:12 +0200 | [diff] [blame] | 928 | if (ret) { |
| 929 | *ret = count * 3; |
| 930 | } |
Corentin Chary | 380282b | 2010-05-19 09:24:10 +0200 | [diff] [blame] | 931 | |
| 932 | while (count--) { |
| 933 | pix = *buf32++; |
| 934 | *buf++ = (char)(pix >> rshift); |
| 935 | *buf++ = (char)(pix >> gshift); |
| 936 | *buf++ = (char)(pix >> bshift); |
| 937 | } |
| 938 | } |
| 939 | |
| 940 | static int send_full_color_rect(VncState *vs, int w, int h) |
| 941 | { |
| 942 | int stream = 0; |
| 943 | size_t bytes; |
| 944 | |
| 945 | vnc_write_u8(vs, stream << 4); /* no flushing, no filter */ |
| 946 | |
| 947 | if (vs->tight_pixel24) { |
Corentin Chary | aa7d73f | 2010-05-19 09:24:12 +0200 | [diff] [blame] | 948 | tight_pack24(vs, vs->tight.buffer, w * h, &vs->tight.offset); |
Corentin Chary | 380282b | 2010-05-19 09:24:10 +0200 | [diff] [blame] | 949 | bytes = 3; |
| 950 | } else { |
| 951 | bytes = vs->clientds.pf.bytes_per_pixel; |
| 952 | } |
| 953 | |
| 954 | bytes = tight_compress_data(vs, stream, w * h * bytes, |
| 955 | tight_conf[vs->tight_compression].raw_zlib_level, |
| 956 | Z_DEFAULT_STRATEGY); |
| 957 | |
| 958 | return (bytes >= 0); |
| 959 | } |
| 960 | |
Corentin Chary | b4bea3f | 2010-05-19 09:24:11 +0200 | [diff] [blame] | 961 | static int send_solid_rect(VncState *vs) |
| 962 | { |
| 963 | size_t bytes; |
| 964 | |
| 965 | vnc_write_u8(vs, VNC_TIGHT_FILL << 4); /* no flushing, no filter */ |
| 966 | |
| 967 | if (vs->tight_pixel24) { |
Corentin Chary | aa7d73f | 2010-05-19 09:24:12 +0200 | [diff] [blame] | 968 | tight_pack24(vs, vs->tight.buffer, 1, &vs->tight.offset); |
Corentin Chary | b4bea3f | 2010-05-19 09:24:11 +0200 | [diff] [blame] | 969 | bytes = 3; |
| 970 | } else { |
| 971 | bytes = vs->clientds.pf.bytes_per_pixel; |
| 972 | } |
| 973 | |
| 974 | vnc_write(vs, vs->tight.buffer, bytes); |
| 975 | return 1; |
| 976 | } |
| 977 | |
Corentin Chary | aa7d73f | 2010-05-19 09:24:12 +0200 | [diff] [blame] | 978 | static int send_mono_rect(VncState *vs, int w, int h, uint32_t bg, uint32_t fg) |
| 979 | { |
| 980 | size_t bytes; |
| 981 | int stream = 1; |
| 982 | int level = tight_conf[vs->tight_compression].mono_zlib_level; |
| 983 | |
| 984 | bytes = ((w + 7) / 8) * h; |
| 985 | |
| 986 | vnc_write_u8(vs, (stream | VNC_TIGHT_EXPLICIT_FILTER) << 4); |
| 987 | vnc_write_u8(vs, VNC_TIGHT_FILTER_PALETTE); |
| 988 | vnc_write_u8(vs, 1); |
| 989 | |
| 990 | switch(vs->clientds.pf.bytes_per_pixel) { |
| 991 | case 4: |
| 992 | { |
| 993 | uint32_t buf[2] = {bg, fg}; |
| 994 | size_t ret = sizeof (buf); |
| 995 | |
| 996 | if (vs->tight_pixel24) { |
| 997 | tight_pack24(vs, (unsigned char*)buf, 2, &ret); |
| 998 | } |
| 999 | vnc_write(vs, buf, ret); |
| 1000 | |
| 1001 | tight_encode_mono_rect32(vs->tight.buffer, w, h, bg, fg); |
| 1002 | break; |
| 1003 | } |
| 1004 | case 2: |
| 1005 | vnc_write(vs, &bg, 2); |
| 1006 | vnc_write(vs, &fg, 2); |
| 1007 | tight_encode_mono_rect16(vs->tight.buffer, w, h, bg, fg); |
| 1008 | break; |
| 1009 | default: |
| 1010 | vnc_write_u8(vs, bg); |
| 1011 | vnc_write_u8(vs, fg); |
| 1012 | tight_encode_mono_rect8(vs->tight.buffer, w, h, bg, fg); |
| 1013 | break; |
| 1014 | } |
| 1015 | vs->tight.offset = bytes; |
| 1016 | |
| 1017 | bytes = tight_compress_data(vs, stream, bytes, level, Z_DEFAULT_STRATEGY); |
| 1018 | return (bytes >= 0); |
| 1019 | } |
| 1020 | |
| 1021 | struct palette_cb_priv { |
| 1022 | VncState *vs; |
| 1023 | uint8_t *header; |
| 1024 | }; |
| 1025 | |
| 1026 | static void write_palette(const char *key, QObject *obj, void *opaque) |
| 1027 | { |
| 1028 | struct palette_cb_priv *priv = opaque; |
| 1029 | VncState *vs = priv->vs; |
| 1030 | uint32_t bytes = vs->clientds.pf.bytes_per_pixel; |
| 1031 | uint8_t idx = qint_get_int(qobject_to_qint(obj)); |
| 1032 | |
| 1033 | if (bytes == 4) { |
| 1034 | uint32_t color = tight_palette_buf2rgb(32, (uint8_t *)key); |
| 1035 | |
| 1036 | ((uint32_t*)priv->header)[idx] = color; |
| 1037 | } else { |
| 1038 | uint16_t color = tight_palette_buf2rgb(16, (uint8_t *)key); |
| 1039 | |
| 1040 | ((uint16_t*)priv->header)[idx] = color; |
| 1041 | } |
| 1042 | } |
| 1043 | |
Corentin Chary | 2f6f5c7 | 2010-07-07 20:57:49 +0200 | [diff] [blame] | 1044 | static bool send_gradient_rect(VncState *vs, int w, int h) |
| 1045 | { |
| 1046 | int stream = 3; |
| 1047 | int level = tight_conf[vs->tight_compression].gradient_zlib_level; |
| 1048 | size_t bytes; |
| 1049 | |
| 1050 | if (vs->clientds.pf.bytes_per_pixel == 1) |
| 1051 | return send_full_color_rect(vs, w, h); |
| 1052 | |
| 1053 | vnc_write_u8(vs, (stream | VNC_TIGHT_EXPLICIT_FILTER) << 4); |
| 1054 | vnc_write_u8(vs, VNC_TIGHT_FILTER_GRADIENT); |
| 1055 | |
| 1056 | buffer_reserve(&vs->tight_gradient, w * 3 * sizeof (int)); |
| 1057 | |
| 1058 | if (vs->tight_pixel24) { |
| 1059 | tight_filter_gradient24(vs, vs->tight.buffer, w, h); |
| 1060 | bytes = 3; |
| 1061 | } else if (vs->clientds.pf.bytes_per_pixel == 4) { |
| 1062 | tight_filter_gradient32(vs, (uint32_t *)vs->tight.buffer, w, h); |
| 1063 | bytes = 4; |
| 1064 | } else { |
| 1065 | tight_filter_gradient16(vs, (uint16_t *)vs->tight.buffer, w, h); |
| 1066 | bytes = 2; |
| 1067 | } |
| 1068 | |
| 1069 | buffer_reset(&vs->tight_gradient); |
| 1070 | |
| 1071 | bytes = w * h * bytes; |
| 1072 | vs->tight.offset = bytes; |
| 1073 | |
| 1074 | bytes = tight_compress_data(vs, stream, bytes, |
| 1075 | level, Z_FILTERED); |
| 1076 | return (bytes >= 0); |
| 1077 | } |
| 1078 | |
Corentin Chary | aa7d73f | 2010-05-19 09:24:12 +0200 | [diff] [blame] | 1079 | static int send_palette_rect(VncState *vs, int w, int h, struct QDict *palette) |
| 1080 | { |
| 1081 | int stream = 2; |
| 1082 | int level = tight_conf[vs->tight_compression].idx_zlib_level; |
| 1083 | int colors; |
| 1084 | size_t bytes; |
| 1085 | |
| 1086 | colors = qdict_size(palette); |
| 1087 | |
| 1088 | vnc_write_u8(vs, (stream | VNC_TIGHT_EXPLICIT_FILTER) << 4); |
| 1089 | vnc_write_u8(vs, VNC_TIGHT_FILTER_PALETTE); |
| 1090 | vnc_write_u8(vs, colors - 1); |
| 1091 | |
| 1092 | switch(vs->clientds.pf.bytes_per_pixel) { |
| 1093 | case 4: |
| 1094 | { |
| 1095 | size_t old_offset, offset; |
| 1096 | uint32_t header[qdict_size(palette)]; |
| 1097 | struct palette_cb_priv priv = { vs, (uint8_t *)header }; |
| 1098 | |
| 1099 | old_offset = vs->output.offset; |
| 1100 | qdict_iter(palette, write_palette, &priv); |
| 1101 | vnc_write(vs, header, sizeof(header)); |
| 1102 | |
| 1103 | if (vs->tight_pixel24) { |
| 1104 | tight_pack24(vs, vs->output.buffer + old_offset, colors, &offset); |
| 1105 | vs->output.offset = old_offset + offset; |
| 1106 | } |
| 1107 | |
| 1108 | tight_encode_indexed_rect32(vs->tight.buffer, w * h, palette); |
| 1109 | break; |
| 1110 | } |
| 1111 | case 2: |
| 1112 | { |
| 1113 | uint16_t header[qdict_size(palette)]; |
| 1114 | struct palette_cb_priv priv = { vs, (uint8_t *)header }; |
| 1115 | |
| 1116 | qdict_iter(palette, write_palette, &priv); |
| 1117 | vnc_write(vs, header, sizeof(header)); |
| 1118 | tight_encode_indexed_rect16(vs->tight.buffer, w * h, palette); |
| 1119 | break; |
| 1120 | } |
| 1121 | default: |
| 1122 | return -1; /* No palette for 8bits colors */ |
| 1123 | break; |
| 1124 | } |
| 1125 | bytes = w * h; |
| 1126 | vs->tight.offset = bytes; |
| 1127 | |
| 1128 | bytes = tight_compress_data(vs, stream, bytes, |
| 1129 | level, Z_DEFAULT_STRATEGY); |
| 1130 | return (bytes >= 0); |
| 1131 | } |
| 1132 | |
Corentin Chary | 2f6f5c7 | 2010-07-07 20:57:49 +0200 | [diff] [blame] | 1133 | /* |
| 1134 | * JPEG compression stuff. |
| 1135 | */ |
| 1136 | #ifdef CONFIG_VNC_JPEG |
| 1137 | static void jpeg_prepare_row24(VncState *vs, uint8_t *dst, int x, int y, |
| 1138 | int count) |
| 1139 | { |
| 1140 | VncDisplay *vd = vs->vd; |
| 1141 | uint32_t *fbptr; |
| 1142 | uint32_t pix; |
| 1143 | |
| 1144 | fbptr = (uint32_t *)(vd->server->data + y * ds_get_linesize(vs->ds) + |
| 1145 | x * ds_get_bytes_per_pixel(vs->ds)); |
| 1146 | |
| 1147 | while (count--) { |
| 1148 | pix = *fbptr++; |
| 1149 | *dst++ = (uint8_t)(pix >> vs->ds->surface->pf.rshift); |
| 1150 | *dst++ = (uint8_t)(pix >> vs->ds->surface->pf.gshift); |
| 1151 | *dst++ = (uint8_t)(pix >> vs->ds->surface->pf.bshift); |
| 1152 | } |
| 1153 | } |
| 1154 | |
| 1155 | #define DEFINE_JPEG_GET_ROW_FUNCTION(bpp) \ |
| 1156 | \ |
| 1157 | static void \ |
| 1158 | jpeg_prepare_row##bpp(VncState *vs, uint8_t *dst, \ |
| 1159 | int x, int y, int count) \ |
| 1160 | { \ |
| 1161 | VncDisplay *vd = vs->vd; \ |
| 1162 | uint##bpp##_t *fbptr; \ |
| 1163 | uint##bpp##_t pix; \ |
| 1164 | int r, g, b; \ |
| 1165 | \ |
| 1166 | fbptr = (uint##bpp##_t *) \ |
| 1167 | (vd->server->data + y * ds_get_linesize(vs->ds) + \ |
| 1168 | x * ds_get_bytes_per_pixel(vs->ds)); \ |
| 1169 | \ |
| 1170 | while (count--) { \ |
| 1171 | pix = *fbptr++; \ |
| 1172 | \ |
| 1173 | r = (int)((pix >> vs->ds->surface->pf.rshift) \ |
| 1174 | & vs->ds->surface->pf.rmax); \ |
| 1175 | g = (int)((pix >> vs->ds->surface->pf.gshift) \ |
| 1176 | & vs->ds->surface->pf.gmax); \ |
| 1177 | b = (int)((pix >> vs->ds->surface->pf.bshift) \ |
| 1178 | & vs->ds->surface->pf.bmax); \ |
| 1179 | \ |
| 1180 | *dst++ = (uint8_t)((r * 255 + vs->ds->surface->pf.rmax / 2) \ |
| 1181 | / vs->ds->surface->pf.rmax); \ |
| 1182 | *dst++ = (uint8_t)((g * 255 + vs->ds->surface->pf.gmax / 2) \ |
| 1183 | / vs->ds->surface->pf.gmax); \ |
| 1184 | *dst++ = (uint8_t)((b * 255 + vs->ds->surface->pf.bmax / 2) \ |
| 1185 | / vs->ds->surface->pf.bmax); \ |
| 1186 | } \ |
| 1187 | } |
| 1188 | |
| 1189 | DEFINE_JPEG_GET_ROW_FUNCTION(16) |
| 1190 | DEFINE_JPEG_GET_ROW_FUNCTION(32) |
| 1191 | |
| 1192 | static void jpeg_prepare_row(VncState *vs, uint8_t *dst, int x, int y, |
| 1193 | int count) |
| 1194 | { |
| 1195 | if (vs->tight_pixel24) |
| 1196 | jpeg_prepare_row24(vs, dst, x, y, count); |
| 1197 | else if (ds_get_bytes_per_pixel(vs->ds) == 4) |
| 1198 | jpeg_prepare_row32(vs, dst, x, y, count); |
| 1199 | else |
| 1200 | jpeg_prepare_row16(vs, dst, x, y, count); |
| 1201 | } |
| 1202 | |
| 1203 | /* |
| 1204 | * Destination manager implementation for JPEG library. |
| 1205 | */ |
| 1206 | |
| 1207 | /* This is called once per encoding */ |
| 1208 | static void jpeg_init_destination(j_compress_ptr cinfo) |
| 1209 | { |
| 1210 | VncState *vs = cinfo->client_data; |
| 1211 | Buffer *buffer = &vs->tight_jpeg; |
| 1212 | |
| 1213 | cinfo->dest->next_output_byte = (JOCTET *)buffer->buffer + buffer->offset; |
| 1214 | cinfo->dest->free_in_buffer = (size_t)(buffer->capacity - buffer->offset); |
| 1215 | } |
| 1216 | |
| 1217 | /* This is called when we ran out of buffer (shouldn't happen!) */ |
| 1218 | static boolean jpeg_empty_output_buffer(j_compress_ptr cinfo) |
| 1219 | { |
| 1220 | VncState *vs = cinfo->client_data; |
| 1221 | Buffer *buffer = &vs->tight_jpeg; |
| 1222 | |
| 1223 | buffer->offset = buffer->capacity; |
| 1224 | buffer_reserve(buffer, 2048); |
| 1225 | jpeg_init_destination(cinfo); |
| 1226 | return TRUE; |
| 1227 | } |
| 1228 | |
| 1229 | /* This is called when we are done processing data */ |
| 1230 | static void jpeg_term_destination(j_compress_ptr cinfo) |
| 1231 | { |
| 1232 | VncState *vs = cinfo->client_data; |
| 1233 | Buffer *buffer = &vs->tight_jpeg; |
| 1234 | |
| 1235 | buffer->offset = buffer->capacity - cinfo->dest->free_in_buffer; |
| 1236 | } |
| 1237 | |
| 1238 | static int send_jpeg_rect(VncState *vs, int x, int y, int w, int h, int quality) |
| 1239 | { |
| 1240 | struct jpeg_compress_struct cinfo; |
| 1241 | struct jpeg_error_mgr jerr; |
| 1242 | struct jpeg_destination_mgr manager; |
| 1243 | JSAMPROW row[1]; |
| 1244 | uint8_t *buf; |
| 1245 | int dy; |
| 1246 | |
| 1247 | if (ds_get_bytes_per_pixel(vs->ds) == 1) |
| 1248 | return send_full_color_rect(vs, w, h); |
| 1249 | |
| 1250 | buf = qemu_malloc(w * 3); |
| 1251 | row[0] = buf; |
| 1252 | buffer_reserve(&vs->tight_jpeg, 2048); |
| 1253 | |
| 1254 | cinfo.err = jpeg_std_error(&jerr); |
| 1255 | jpeg_create_compress(&cinfo); |
| 1256 | |
| 1257 | cinfo.client_data = vs; |
| 1258 | cinfo.image_width = w; |
| 1259 | cinfo.image_height = h; |
| 1260 | cinfo.input_components = 3; |
| 1261 | cinfo.in_color_space = JCS_RGB; |
| 1262 | |
| 1263 | jpeg_set_defaults(&cinfo); |
| 1264 | jpeg_set_quality(&cinfo, quality, true); |
| 1265 | |
| 1266 | manager.init_destination = jpeg_init_destination; |
| 1267 | manager.empty_output_buffer = jpeg_empty_output_buffer; |
| 1268 | manager.term_destination = jpeg_term_destination; |
| 1269 | cinfo.dest = &manager; |
| 1270 | |
| 1271 | jpeg_start_compress(&cinfo, true); |
| 1272 | |
| 1273 | for (dy = 0; dy < h; dy++) { |
| 1274 | jpeg_prepare_row(vs, buf, x, y + dy, w); |
| 1275 | jpeg_write_scanlines(&cinfo, row, 1); |
| 1276 | } |
| 1277 | |
| 1278 | jpeg_finish_compress(&cinfo); |
| 1279 | jpeg_destroy_compress(&cinfo); |
| 1280 | |
| 1281 | vnc_write_u8(vs, VNC_TIGHT_JPEG << 4); |
| 1282 | |
| 1283 | tight_send_compact_size(vs, vs->tight_jpeg.offset); |
| 1284 | vnc_write(vs, vs->tight_jpeg.buffer, vs->tight_jpeg.offset); |
| 1285 | buffer_reset(&vs->tight_jpeg); |
| 1286 | |
| 1287 | return 1; |
| 1288 | } |
| 1289 | #endif /* CONFIG_VNC_JPEG */ |
| 1290 | |
Corentin Chary | 380282b | 2010-05-19 09:24:10 +0200 | [diff] [blame] | 1291 | static void vnc_tight_start(VncState *vs) |
| 1292 | { |
| 1293 | buffer_reset(&vs->tight); |
| 1294 | |
| 1295 | // make the output buffer be the zlib buffer, so we can compress it later |
| 1296 | vs->tight_tmp = vs->output; |
| 1297 | vs->output = vs->tight; |
| 1298 | } |
| 1299 | |
| 1300 | static void vnc_tight_stop(VncState *vs) |
| 1301 | { |
| 1302 | // switch back to normal output/zlib buffers |
| 1303 | vs->tight = vs->output; |
| 1304 | vs->output = vs->tight_tmp; |
| 1305 | } |
| 1306 | |
| 1307 | static int send_sub_rect(VncState *vs, int x, int y, int w, int h) |
| 1308 | { |
Corentin Chary | aa7d73f | 2010-05-19 09:24:12 +0200 | [diff] [blame] | 1309 | struct QDict *palette = NULL; |
| 1310 | uint32_t bg = 0, fg = 0; |
| 1311 | int colors; |
| 1312 | int ret = 0; |
| 1313 | |
Corentin Chary | 380282b | 2010-05-19 09:24:10 +0200 | [diff] [blame] | 1314 | vnc_framebuffer_update(vs, x, y, w, h, VNC_ENCODING_TIGHT); |
| 1315 | |
Corentin Chary | 380282b | 2010-05-19 09:24:10 +0200 | [diff] [blame] | 1316 | vnc_tight_start(vs); |
| 1317 | vnc_raw_send_framebuffer_update(vs, x, y, w, h); |
| 1318 | vnc_tight_stop(vs); |
| 1319 | |
Corentin Chary | aa7d73f | 2010-05-19 09:24:12 +0200 | [diff] [blame] | 1320 | colors = tight_fill_palette(vs, x, y, w * h, &fg, &bg, &palette); |
| 1321 | |
| 1322 | if (colors == 0) { |
Corentin Chary | 2f6f5c7 | 2010-07-07 20:57:49 +0200 | [diff] [blame] | 1323 | if (tight_detect_smooth_image(vs, w, h)) { |
| 1324 | if (vs->tight_quality == -1) { |
| 1325 | ret = send_gradient_rect(vs, w, h); |
| 1326 | } else { |
| 1327 | #ifdef CONFIG_VNC_JPEG |
| 1328 | int quality = tight_conf[vs->tight_quality].jpeg_quality; |
| 1329 | |
| 1330 | ret = send_jpeg_rect(vs, x, y, w, h, quality); |
| 1331 | #else |
| 1332 | ret = send_full_color_rect(vs, w, h); |
| 1333 | #endif |
| 1334 | } |
| 1335 | } else { |
| 1336 | ret = send_full_color_rect(vs, w, h); |
| 1337 | } |
Corentin Chary | aa7d73f | 2010-05-19 09:24:12 +0200 | [diff] [blame] | 1338 | } else if (colors == 1) { |
| 1339 | ret = send_solid_rect(vs); |
| 1340 | } else if (colors == 2) { |
| 1341 | ret = send_mono_rect(vs, w, h, bg, fg); |
| 1342 | } else if (colors <= 256) { |
Corentin Chary | 2f6f5c7 | 2010-07-07 20:57:49 +0200 | [diff] [blame] | 1343 | #ifdef CONFIG_VNC_JPEG |
| 1344 | if (colors > 96 && vs->tight_quality != -1 && vs->tight_quality <= 3 && |
| 1345 | tight_detect_smooth_image(vs, w, h)) { |
| 1346 | int quality = tight_conf[vs->tight_quality].jpeg_quality; |
| 1347 | |
| 1348 | ret = send_jpeg_rect(vs, x, y, w, h, quality); |
| 1349 | } else { |
| 1350 | ret = send_palette_rect(vs, w, h, palette); |
| 1351 | } |
| 1352 | #else |
Corentin Chary | aa7d73f | 2010-05-19 09:24:12 +0200 | [diff] [blame] | 1353 | ret = send_palette_rect(vs, w, h, palette); |
Corentin Chary | 2f6f5c7 | 2010-07-07 20:57:49 +0200 | [diff] [blame] | 1354 | #endif |
Corentin Chary | aa7d73f | 2010-05-19 09:24:12 +0200 | [diff] [blame] | 1355 | } |
| 1356 | QDECREF(palette); |
| 1357 | return ret; |
Corentin Chary | 380282b | 2010-05-19 09:24:10 +0200 | [diff] [blame] | 1358 | } |
| 1359 | |
Corentin Chary | b4bea3f | 2010-05-19 09:24:11 +0200 | [diff] [blame] | 1360 | static int send_sub_rect_solid(VncState *vs, int x, int y, int w, int h) |
| 1361 | { |
| 1362 | vnc_framebuffer_update(vs, x, y, w, h, VNC_ENCODING_TIGHT); |
| 1363 | |
| 1364 | vnc_tight_start(vs); |
| 1365 | vnc_raw_send_framebuffer_update(vs, x, y, w, h); |
| 1366 | vnc_tight_stop(vs); |
| 1367 | |
| 1368 | return send_solid_rect(vs); |
| 1369 | } |
| 1370 | |
Corentin Chary | 380282b | 2010-05-19 09:24:10 +0200 | [diff] [blame] | 1371 | static int send_rect_simple(VncState *vs, int x, int y, int w, int h) |
| 1372 | { |
| 1373 | int max_size, max_width; |
| 1374 | int max_sub_width, max_sub_height; |
| 1375 | int dx, dy; |
| 1376 | int rw, rh; |
| 1377 | int n = 0; |
| 1378 | |
| 1379 | max_size = tight_conf[vs->tight_compression].max_rect_size; |
| 1380 | max_width = tight_conf[vs->tight_compression].max_rect_width; |
| 1381 | |
| 1382 | if (w > max_width || w * h > max_size) { |
| 1383 | max_sub_width = (w > max_width) ? max_width : w; |
| 1384 | max_sub_height = max_size / max_sub_width; |
| 1385 | |
| 1386 | for (dy = 0; dy < h; dy += max_sub_height) { |
| 1387 | for (dx = 0; dx < w; dx += max_width) { |
| 1388 | rw = MIN(max_sub_width, w - dx); |
| 1389 | rh = MIN(max_sub_height, h - dy); |
| 1390 | n += send_sub_rect(vs, x+dx, y+dy, rw, rh); |
| 1391 | } |
| 1392 | } |
| 1393 | } else { |
| 1394 | n += send_sub_rect(vs, x, y, w, h); |
| 1395 | } |
| 1396 | |
| 1397 | return n; |
| 1398 | } |
| 1399 | |
Corentin Chary | b4bea3f | 2010-05-19 09:24:11 +0200 | [diff] [blame] | 1400 | static int find_large_solid_color_rect(VncState *vs, int x, int y, |
| 1401 | int w, int h, int max_rows) |
| 1402 | { |
| 1403 | int dx, dy, dw, dh; |
| 1404 | int n = 0; |
| 1405 | |
| 1406 | /* Try to find large solid-color areas and send them separately. */ |
| 1407 | |
| 1408 | for (dy = y; dy < y + h; dy += VNC_TIGHT_MAX_SPLIT_TILE_SIZE) { |
| 1409 | |
| 1410 | /* If a rectangle becomes too large, send its upper part now. */ |
| 1411 | |
| 1412 | if (dy - y >= max_rows) { |
| 1413 | n += send_rect_simple(vs, x, y, w, max_rows); |
| 1414 | y += max_rows; |
| 1415 | h -= max_rows; |
| 1416 | } |
| 1417 | |
| 1418 | dh = MIN(VNC_TIGHT_MAX_SPLIT_TILE_SIZE, (y + h - dy)); |
| 1419 | |
| 1420 | for (dx = x; dx < x + w; dx += VNC_TIGHT_MAX_SPLIT_TILE_SIZE) { |
| 1421 | uint32_t color_value; |
| 1422 | int x_best, y_best, w_best, h_best; |
| 1423 | |
| 1424 | dw = MIN(VNC_TIGHT_MAX_SPLIT_TILE_SIZE, (x + w - dx)); |
| 1425 | |
| 1426 | if (!check_solid_tile(vs, dx, dy, dw, dh, &color_value, false)) { |
| 1427 | continue ; |
| 1428 | } |
| 1429 | |
| 1430 | /* Get dimensions of solid-color area. */ |
| 1431 | |
| 1432 | find_best_solid_area(vs, dx, dy, w - (dx - x), h - (dy - y), |
| 1433 | color_value, &w_best, &h_best); |
| 1434 | |
| 1435 | /* Make sure a solid rectangle is large enough |
| 1436 | (or the whole rectangle is of the same color). */ |
| 1437 | |
| 1438 | if (w_best * h_best != w * h && |
| 1439 | w_best * h_best < VNC_TIGHT_MIN_SOLID_SUBRECT_SIZE) { |
| 1440 | continue; |
| 1441 | } |
| 1442 | |
| 1443 | /* Try to extend solid rectangle to maximum size. */ |
| 1444 | |
| 1445 | x_best = dx; y_best = dy; |
| 1446 | extend_solid_area(vs, x, y, w, h, color_value, |
| 1447 | &x_best, &y_best, &w_best, &h_best); |
| 1448 | |
| 1449 | /* Send rectangles at top and left to solid-color area. */ |
| 1450 | |
| 1451 | if (y_best != y) { |
| 1452 | n += send_rect_simple(vs, x, y, w, y_best-y); |
| 1453 | } |
| 1454 | if (x_best != x) { |
| 1455 | n += vnc_tight_send_framebuffer_update(vs, x, y_best, |
| 1456 | x_best-x, h_best); |
| 1457 | } |
| 1458 | |
| 1459 | /* Send solid-color rectangle. */ |
| 1460 | n += send_sub_rect_solid(vs, x_best, y_best, w_best, h_best); |
| 1461 | |
| 1462 | /* Send remaining rectangles (at right and bottom). */ |
| 1463 | |
| 1464 | if (x_best + w_best != x + w) { |
| 1465 | n += vnc_tight_send_framebuffer_update(vs, x_best+w_best, |
| 1466 | y_best, |
| 1467 | w-(x_best-x)-w_best, |
| 1468 | h_best); |
| 1469 | } |
| 1470 | if (y_best + h_best != y + h) { |
| 1471 | n += vnc_tight_send_framebuffer_update(vs, x, y_best+h_best, |
| 1472 | w, h-(y_best-y)-h_best); |
| 1473 | } |
| 1474 | |
| 1475 | /* Return after all recursive calls are done. */ |
| 1476 | return n; |
| 1477 | } |
| 1478 | } |
| 1479 | return n + send_rect_simple(vs, x, y, w, h); |
| 1480 | } |
| 1481 | |
Corentin Chary | 380282b | 2010-05-19 09:24:10 +0200 | [diff] [blame] | 1482 | int vnc_tight_send_framebuffer_update(VncState *vs, int x, int y, |
| 1483 | int w, int h) |
| 1484 | { |
Corentin Chary | b4bea3f | 2010-05-19 09:24:11 +0200 | [diff] [blame] | 1485 | int max_rows; |
| 1486 | |
Corentin Chary | 380282b | 2010-05-19 09:24:10 +0200 | [diff] [blame] | 1487 | if (vs->clientds.pf.bytes_per_pixel == 4 && vs->clientds.pf.rmax == 0xFF && |
| 1488 | vs->clientds.pf.bmax == 0xFF && vs->clientds.pf.gmax == 0xFF) { |
| 1489 | vs->tight_pixel24 = true; |
| 1490 | } else { |
| 1491 | vs->tight_pixel24 = false; |
| 1492 | } |
| 1493 | |
Corentin Chary | b4bea3f | 2010-05-19 09:24:11 +0200 | [diff] [blame] | 1494 | if (w * h < VNC_TIGHT_MIN_SPLIT_RECT_SIZE) |
| 1495 | return send_rect_simple(vs, x, y, w, h); |
| 1496 | |
| 1497 | /* Calculate maximum number of rows in one non-solid rectangle. */ |
| 1498 | |
| 1499 | max_rows = tight_conf[vs->tight_compression].max_rect_size; |
| 1500 | max_rows /= MIN(tight_conf[vs->tight_compression].max_rect_width, w); |
| 1501 | |
| 1502 | return find_large_solid_color_rect(vs, x, y, w, h, max_rows); |
Corentin Chary | 380282b | 2010-05-19 09:24:10 +0200 | [diff] [blame] | 1503 | } |
| 1504 | |
| 1505 | void vnc_tight_clear(VncState *vs) |
| 1506 | { |
| 1507 | int i; |
| 1508 | for (i=0; i<ARRAY_SIZE(vs->tight_stream); i++) { |
| 1509 | if (vs->tight_stream[i].opaque) { |
| 1510 | deflateEnd(&vs->tight_stream[i]); |
| 1511 | } |
| 1512 | } |
| 1513 | |
| 1514 | buffer_free(&vs->tight); |
| 1515 | buffer_free(&vs->tight_zlib); |
Corentin Chary | 2f6f5c7 | 2010-07-07 20:57:49 +0200 | [diff] [blame] | 1516 | buffer_free(&vs->tight_gradient); |
| 1517 | #ifdef CONFIG_VNC_JPEG |
| 1518 | buffer_free(&vs->tight_jpeg); |
| 1519 | #endif |
Corentin Chary | 380282b | 2010-05-19 09:24:10 +0200 | [diff] [blame] | 1520 | } |