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| 1 /* | |
| 2 * jdsample.c | |
| 3 * | |
| 4 * Copyright (C) 1991-1996, Thomas G. Lane. | |
| 5 * This file is part of the Independent JPEG Group's software. | |
| 6 * For conditions of distribution and use, see the accompanying README file. | |
| 7 * | |
| 8 * This file contains upsampling routines. | |
| 9 * | |
| 10 * Upsampling input data is counted in "row groups". A row group | |
| 11 * is defined to be (v_samp_factor * DCT_scaled_size / min_DCT_scaled_size) | |
| 12 * sample rows of each component. Upsampling will normally produce | |
| 13 * max_v_samp_factor pixel rows from each row group (but this could vary | |
| 14 * if the upsampler is applying a scale factor of its own). | |
| 15 * | |
| 16 * An excellent reference for image resampling is | |
| 17 * Digital Image Warping, George Wolberg, 1990. | |
| 18 * Pub. by IEEE Computer Society Press, Los Alamitos, CA. ISBN 0-8186-8944-7. | |
| 19 */ | |
| 20 | |
| 21 #define JPEG_INTERNALS | |
| 22 #include "jinclude.h" | |
| 23 #include "jpeglib.h" | |
| 24 | |
| 25 | |
| 26 /* Pointer to routine to upsample a single component */ | |
| 27 typedef JMETHOD(void, upsample1_ptr, | |
| 28 (j_decompress_ptr cinfo, jpeg_component_info * compptr, | |
| 29 JSAMPARRAY input_data, JSAMPARRAY * output_data_ptr)); | |
| 30 | |
| 31 /* Private subobject */ | |
| 32 | |
| 33 typedef struct { | |
| 34 struct jpeg_upsampler pub; /* public fields */ | |
| 35 | |
| 36 /* Color conversion buffer. When using separate upsampling and color | |
| 37 * conversion steps, this buffer holds one upsampled row group until it | |
| 38 * has been color converted and output. | |
| 39 * Note: we do not allocate any storage for component(s) which are full-size, | |
| 40 * ie do not need rescaling. The corresponding entry of color_buf[] is | |
| 41 * simply set to point to the input data array, thereby avoiding copying. | |
| 42 */ | |
| 43 JSAMPARRAY color_buf[MAX_COMPONENTS]; | |
| 44 | |
| 45 /* Per-component upsampling method pointers */ | |
| 46 upsample1_ptr methods[MAX_COMPONENTS]; | |
| 47 | |
| 48 int next_row_out; /* counts rows emitted from color_buf */ | |
| 49 JDIMENSION rows_to_go; /* counts rows remaining in image */ | |
| 50 | |
| 51 /* Height of an input row group for each component. */ | |
| 52 int rowgroup_height[MAX_COMPONENTS]; | |
| 53 | |
| 54 /* These arrays save pixel expansion factors so that int_expand need not | |
| 55 * recompute them each time. They are unused for other upsampling methods. | |
| 56 */ | |
| 57 UINT8 h_expand[MAX_COMPONENTS]; | |
| 58 UINT8 v_expand[MAX_COMPONENTS]; | |
| 59 } my_upsampler; | |
| 60 | |
| 61 typedef my_upsampler * my_upsample_ptr; | |
| 62 | |
| 63 | |
| 64 /* | |
| 65 * Initialize for an upsampling pass. | |
| 66 */ | |
| 67 | |
| 68 METHODDEF(void) | |
| 69 start_pass_upsample (j_decompress_ptr cinfo) | |
| 70 { | |
| 71 my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample; | |
| 72 | |
| 73 /* Mark the conversion buffer empty */ | |
| 74 upsample->next_row_out = cinfo->max_v_samp_factor; | |
| 75 /* Initialize total-height counter for detecting bottom of image */ | |
| 76 upsample->rows_to_go = cinfo->output_height; | |
| 77 } | |
| 78 | |
| 79 | |
| 80 /* | |
| 81 * Control routine to do upsampling (and color conversion). | |
| 82 * | |
| 83 * In this version we upsample each component independently. | |
| 84 * We upsample one row group into the conversion buffer, then apply | |
| 85 * color conversion a row at a time. | |
| 86 */ | |
| 87 | |
| 88 METHODDEF(void) | |
| 89 sep_upsample (j_decompress_ptr cinfo, | |
| 90 JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr, | |
| 91 JDIMENSION in_row_groups_avail, | |
| 92 JSAMPARRAY output_buf, JDIMENSION *out_row_ctr, | |
| 93 JDIMENSION out_rows_avail) | |
| 94 { | |
| 95 my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample; | |
| 96 int ci; | |
| 97 jpeg_component_info * compptr; | |
| 98 JDIMENSION num_rows; | |
| 99 | |
| 100 /* Fill the conversion buffer, if it's empty */ | |
| 101 if (upsample->next_row_out >= cinfo->max_v_samp_factor) { | |
| 102 for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; | |
| 103 ci++, compptr++) { | |
| 104 /* Invoke per-component upsample method. Notice we pass a POINTER | |
| 105 * to color_buf[ci], so that fullsize_upsample can change it. | |
| 106 */ | |
| 107 (*upsample->methods[ci]) (cinfo, compptr, | |
| 108 input_buf[ci] + (*in_row_group_ctr * upsample->rowgroup_height[ci]), | |
| 109 upsample->color_buf + ci); | |
| 110 } | |
| 111 upsample->next_row_out = 0; | |
| 112 } | |
| 113 | |
| 114 /* Color-convert and emit rows */ | |
| 115 | |
| 116 /* How many we have in the buffer: */ | |
| 117 num_rows = (JDIMENSION) (cinfo->max_v_samp_factor - upsample->next_row_out); | |
| 118 /* Not more than the distance to the end of the image. Need this test | |
| 119 * in case the image height is not a multiple of max_v_samp_factor: | |
| 120 */ | |
| 121 if (num_rows > upsample->rows_to_go) | |
| 122 num_rows = upsample->rows_to_go; | |
| 123 /* And not more than what the client can accept: */ | |
| 124 out_rows_avail -= *out_row_ctr; | |
| 125 if (num_rows > out_rows_avail) | |
| 126 num_rows = out_rows_avail; | |
| 127 | |
| 128 (*cinfo->cconvert->color_convert) (cinfo, upsample->color_buf, | |
| 129 (JDIMENSION) upsample->next_row_out, | |
| 130 output_buf + *out_row_ctr, | |
| 131 (int) num_rows); | |
| 132 | |
| 133 /* Adjust counts */ | |
| 134 *out_row_ctr += num_rows; | |
| 135 upsample->rows_to_go -= num_rows; | |
| 136 upsample->next_row_out += num_rows; | |
| 137 /* When the buffer is emptied, declare this input row group consumed */ | |
| 138 if (upsample->next_row_out >= cinfo->max_v_samp_factor) | |
| 139 (*in_row_group_ctr)++; | |
| 140 } | |
| 141 | |
| 142 | |
| 143 /* | |
| 144 * These are the routines invoked by sep_upsample to upsample pixel values | |
| 145 * of a single component. One row group is processed per call. | |
| 146 */ | |
| 147 | |
| 148 | |
| 149 /* | |
| 150 * For full-size components, we just make color_buf[ci] point at the | |
| 151 * input buffer, and thus avoid copying any data. Note that this is | |
| 152 * safe only because sep_upsample doesn't declare the input row group | |
| 153 * "consumed" until we are done color converting and emitting it. | |
| 154 */ | |
| 155 | |
| 156 METHODDEF(void) | |
| 157 fullsize_upsample (j_decompress_ptr cinfo, jpeg_component_info * compptr, | |
| 158 JSAMPARRAY input_data, JSAMPARRAY * output_data_ptr) | |
| 159 { | |
| 160 *output_data_ptr = input_data; | |
| 161 } | |
| 162 | |
| 163 | |
| 164 /* | |
| 165 * This is a no-op version used for "uninteresting" components. | |
| 166 * These components will not be referenced by color conversion. | |
| 167 */ | |
| 168 | |
| 169 METHODDEF(void) | |
| 170 noop_upsample (j_decompress_ptr cinfo, jpeg_component_info * compptr, | |
| 171 JSAMPARRAY input_data, JSAMPARRAY * output_data_ptr) | |
| 172 { | |
| 173 *output_data_ptr = NULL; /* safety check */ | |
| 174 } | |
| 175 | |
| 176 | |
| 177 /* | |
| 178 * This version handles any integral sampling ratios. | |
| 179 * This is not used for typical JPEG files, so it need not be fast. | |
| 180 * Nor, for that matter, is it particularly accurate: the algorithm is | |
| 181 * simple replication of the input pixel onto the corresponding output | |
| 182 * pixels. The hi-falutin sampling literature refers to this as a | |
| 183 * "box filter". A box filter tends to introduce visible artifacts, | |
| 184 * so if you are actually going to use 3:1 or 4:1 sampling ratios | |
| 185 * you would be well advised to improve this code. | |
| 186 */ | |
| 187 | |
| 188 METHODDEF(void) | |
| 189 int_upsample (j_decompress_ptr cinfo, jpeg_component_info * compptr, | |
| 190 JSAMPARRAY input_data, JSAMPARRAY * output_data_ptr) | |
| 191 { | |
| 192 my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample; | |
| 193 JSAMPARRAY output_data = *output_data_ptr; | |
| 194 register JSAMPROW inptr, outptr; | |
| 195 register JSAMPLE invalue; | |
| 196 register int h; | |
| 197 JSAMPROW outend; | |
| 198 int h_expand, v_expand; | |
| 199 int inrow, outrow; | |
| 200 | |
| 201 h_expand = upsample->h_expand[compptr->component_index]; | |
| 202 v_expand = upsample->v_expand[compptr->component_index]; | |
| 203 | |
| 204 inrow = outrow = 0; | |
| 205 while (outrow < cinfo->max_v_samp_factor) { | |
| 206 /* Generate one output row with proper horizontal expansion */ | |
| 207 inptr = input_data[inrow]; | |
| 208 outptr = output_data[outrow]; | |
| 209 outend = outptr + cinfo->output_width; | |
| 210 while (outptr < outend) { | |
| 211 invalue = *inptr++; /* don't need GETJSAMPLE() here */ | |
| 212 for (h = h_expand; h > 0; h--) { | |
| 213 *outptr++ = invalue; | |
| 214 } | |
| 215 } | |
| 216 /* Generate any additional output rows by duplicating the first one */ | |
| 217 if (v_expand > 1) { | |
| 218 jcopy_sample_rows(output_data, outrow, output_data, outrow+1, | |
| 219 v_expand-1, cinfo->output_width); | |
| 220 } | |
| 221 inrow++; | |
| 222 outrow += v_expand; | |
| 223 } | |
| 224 } | |
| 225 | |
| 226 | |
| 227 /* | |
| 228 * Fast processing for the common case of 2:1 horizontal and 1:1 vertical. | |
| 229 * It's still a box filter. | |
| 230 */ | |
| 231 | |
| 232 METHODDEF(void) | |
| 233 h2v1_upsample (j_decompress_ptr cinfo, jpeg_component_info * compptr, | |
| 234 JSAMPARRAY input_data, JSAMPARRAY * output_data_ptr) | |
| 235 { | |
| 236 JSAMPARRAY output_data = *output_data_ptr; | |
| 237 register JSAMPROW inptr, outptr; | |
| 238 register JSAMPLE invalue; | |
| 239 JSAMPROW outend; | |
| 240 int inrow; | |
| 241 | |
| 242 for (inrow = 0; inrow < cinfo->max_v_samp_factor; inrow++) { | |
| 243 inptr = input_data[inrow]; | |
| 244 outptr = output_data[inrow]; | |
| 245 outend = outptr + cinfo->output_width; | |
| 246 while (outptr < outend) { | |
| 247 invalue = *inptr++; /* don't need GETJSAMPLE() here */ | |
| 248 *outptr++ = invalue; | |
| 249 *outptr++ = invalue; | |
| 250 } | |
| 251 } | |
| 252 } | |
| 253 | |
| 254 | |
| 255 /* | |
| 256 * Fast processing for the common case of 2:1 horizontal and 2:1 vertical. | |
| 257 * It's still a box filter. | |
| 258 */ | |
| 259 | |
| 260 METHODDEF(void) | |
| 261 h2v2_upsample (j_decompress_ptr cinfo, jpeg_component_info * compptr, | |
| 262 JSAMPARRAY input_data, JSAMPARRAY * output_data_ptr) | |
| 263 { | |
| 264 JSAMPARRAY output_data = *output_data_ptr; | |
| 265 register JSAMPROW inptr, outptr; | |
| 266 register JSAMPLE invalue; | |
| 267 JSAMPROW outend; | |
| 268 int inrow, outrow; | |
| 269 | |
| 270 inrow = outrow = 0; | |
| 271 while (outrow < cinfo->max_v_samp_factor) { | |
| 272 inptr = input_data[inrow]; | |
| 273 outptr = output_data[outrow]; | |
| 274 outend = outptr + cinfo->output_width; | |
| 275 while (outptr < outend) { | |
| 276 invalue = *inptr++; /* don't need GETJSAMPLE() here */ | |
| 277 *outptr++ = invalue; | |
| 278 *outptr++ = invalue; | |
| 279 } | |
| 280 jcopy_sample_rows(output_data, outrow, output_data, outrow+1, | |
| 281 1, cinfo->output_width); | |
| 282 inrow++; | |
| 283 outrow += 2; | |
| 284 } | |
| 285 } | |
| 286 | |
| 287 | |
| 288 /* | |
| 289 * Fancy processing for the common case of 2:1 horizontal and 1:1 vertical. | |
| 290 * | |
| 291 * The upsampling algorithm is linear interpolation between pixel centers, | |
| 292 * also known as a "triangle filter". This is a good compromise between | |
| 293 * speed and visual quality. The centers of the output pixels are 1/4 and 3/4 | |
| 294 * of the way between input pixel centers. | |
| 295 * | |
| 296 * A note about the "bias" calculations: when rounding fractional values to | |
| 297 * integer, we do not want to always round 0.5 up to the next integer. | |
| 298 * If we did that, we'd introduce a noticeable bias towards larger values. | |
| 299 * Instead, this code is arranged so that 0.5 will be rounded up or down at | |
| 300 * alternate pixel locations (a simple ordered dither pattern). | |
| 301 */ | |
| 302 | |
| 303 METHODDEF(void) | |
| 304 h2v1_fancy_upsample (j_decompress_ptr cinfo, jpeg_component_info * compptr, | |
| 305 JSAMPARRAY input_data, JSAMPARRAY * output_data_ptr) | |
| 306 { | |
| 307 JSAMPARRAY output_data = *output_data_ptr; | |
| 308 register JSAMPROW inptr, outptr; | |
| 309 register int invalue; | |
| 310 register JDIMENSION colctr; | |
| 311 int inrow; | |
| 312 | |
| 313 for (inrow = 0; inrow < cinfo->max_v_samp_factor; inrow++) { | |
| 314 inptr = input_data[inrow]; | |
| 315 outptr = output_data[inrow]; | |
| 316 /* Special case for first column */ | |
| 317 invalue = GETJSAMPLE(*inptr++); | |
| 318 *outptr++ = (JSAMPLE) invalue; | |
| 319 *outptr++ = (JSAMPLE) ((invalue * 3 + GETJSAMPLE(*inptr) + 2) >> 2); | |
| 320 | |
| 321 for (colctr = compptr->downsampled_width - 2; colctr > 0; colctr--) { | |
| 322 /* General case: 3/4 * nearer pixel + 1/4 * further pixel */ | |
| 323 invalue = GETJSAMPLE(*inptr++) * 3; | |
| 324 *outptr++ = (JSAMPLE) ((invalue + GETJSAMPLE(inptr[-2]) + 1) >> 2); | |
| 325 *outptr++ = (JSAMPLE) ((invalue + GETJSAMPLE(*inptr) + 2) >> 2); | |
| 326 } | |
| 327 | |
| 328 /* Special case for last column */ | |
| 329 invalue = GETJSAMPLE(*inptr); | |
| 330 *outptr++ = (JSAMPLE) ((invalue * 3 + GETJSAMPLE(inptr[-1]) + 1) >> 2); | |
| 331 *outptr++ = (JSAMPLE) invalue; | |
| 332 } | |
| 333 } | |
| 334 | |
| 335 | |
| 336 /* | |
| 337 * Fancy processing for the common case of 2:1 horizontal and 2:1 vertical. | |
| 338 * Again a triangle filter; see comments for h2v1 case, above. | |
| 339 * | |
| 340 * It is OK for us to reference the adjacent input rows because we demanded | |
| 341 * context from the main buffer controller (see initialization code). | |
| 342 */ | |
| 343 | |
| 344 METHODDEF(void) | |
| 345 h2v2_fancy_upsample (j_decompress_ptr cinfo, jpeg_component_info * compptr, | |
| 346 JSAMPARRAY input_data, JSAMPARRAY * output_data_ptr) | |
| 347 { | |
| 348 JSAMPARRAY output_data = *output_data_ptr; | |
| 349 register JSAMPROW inptr0, inptr1, outptr; | |
| 350 #if BITS_IN_JSAMPLE == 8 | |
| 351 register int thiscolsum, lastcolsum, nextcolsum; | |
| 352 #else | |
| 353 register INT32 thiscolsum, lastcolsum, nextcolsum; | |
| 354 #endif | |
| 355 register JDIMENSION colctr; | |
| 356 int inrow, outrow, v; | |
| 357 | |
| 358 inrow = outrow = 0; | |
| 359 while (outrow < cinfo->max_v_samp_factor) { | |
| 360 for (v = 0; v < 2; v++) { | |
| 361 /* inptr0 points to nearest input row, inptr1 points to next nearest */ | |
| 362 inptr0 = input_data[inrow]; | |
| 363 if (v == 0) /* next nearest is row above */ | |
| 364 inptr1 = input_data[inrow-1]; | |
| 365 else /* next nearest is row below */ | |
| 366 inptr1 = input_data[inrow+1]; | |
| 367 outptr = output_data[outrow++]; | |
| 368 | |
| 369 /* Special case for first column */ | |
| 370 thiscolsum = GETJSAMPLE(*inptr0++) * 3 + GETJSAMPLE(*inptr1++); | |
| 371 nextcolsum = GETJSAMPLE(*inptr0++) * 3 + GETJSAMPLE(*inptr1++); | |
| 372 *outptr++ = (JSAMPLE) ((thiscolsum * 4 + 8) >> 4); | |
| 373 *outptr++ = (JSAMPLE) ((thiscolsum * 3 + nextcolsum + 7) >> 4); | |
| 374 lastcolsum = thiscolsum; thiscolsum = nextcolsum; | |
| 375 | |
| 376 for (colctr = compptr->downsampled_width - 2; colctr > 0; colctr--) { | |
| 377 /* General case: 3/4 * nearer pixel + 1/4 * further pixel in each */ | |
| 378 /* dimension, thus 9/16, 3/16, 3/16, 1/16 overall */ | |
| 379 nextcolsum = GETJSAMPLE(*inptr0++) * 3 + GETJSAMPLE(*inptr1++); | |
| 380 *outptr++ = (JSAMPLE) ((thiscolsum * 3 + lastcolsum + 8) >> 4); | |
| 381 *outptr++ = (JSAMPLE) ((thiscolsum * 3 + nextcolsum + 7) >> 4); | |
| 382 lastcolsum = thiscolsum; thiscolsum = nextcolsum; | |
| 383 } | |
| 384 | |
| 385 /* Special case for last column */ | |
| 386 *outptr++ = (JSAMPLE) ((thiscolsum * 3 + lastcolsum + 8) >> 4); | |
| 387 *outptr++ = (JSAMPLE) ((thiscolsum * 4 + 7) >> 4); | |
| 388 } | |
| 389 inrow++; | |
| 390 } | |
| 391 } | |
| 392 | |
| 393 | |
| 394 /* | |
| 395 * Module initialization routine for upsampling. | |
| 396 */ | |
| 397 | |
| 398 GLOBAL(void) | |
| 399 jinit_upsampler (j_decompress_ptr cinfo) | |
| 400 { | |
| 401 my_upsample_ptr upsample; | |
| 402 int ci; | |
| 403 jpeg_component_info * compptr; | |
| 404 boolean need_buffer, do_fancy; | |
| 405 int h_in_group, v_in_group, h_out_group, v_out_group; | |
| 406 | |
| 407 upsample = (my_upsample_ptr) | |
| 408 (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, | |
| 409 SIZEOF(my_upsampler)); | |
| 410 cinfo->upsample = (struct jpeg_upsampler *) upsample; | |
| 411 upsample->pub.start_pass = start_pass_upsample; | |
| 412 upsample->pub.upsample = sep_upsample; | |
| 413 upsample->pub.need_context_rows = FALSE; /* until we find out differently */ | |
| 414 | |
| 415 if (cinfo->CCIR601_sampling) /* this isn't supported */ | |
| 416 ERREXIT(cinfo, JERR_CCIR601_NOTIMPL); | |
| 417 | |
| 418 /* jdmainct.c doesn't support context rows when min_DCT_scaled_size = 1, | |
| 419 * so don't ask for it. | |
| 420 */ | |
| 421 do_fancy = cinfo->do_fancy_upsampling && cinfo->min_DCT_scaled_size > 1; | |
| 422 | |
| 423 /* Verify we can handle the sampling factors, select per-component methods, | |
| 424 * and create storage as needed. | |
| 425 */ | |
| 426 for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; | |
| 427 ci++, compptr++) { | |
| 428 /* Compute size of an "input group" after IDCT scaling. This many samples | |
| 429 * are to be converted to max_h_samp_factor * max_v_samp_factor pixels. | |
| 430 */ | |
| 431 h_in_group = (compptr->h_samp_factor * compptr->DCT_scaled_size) / | |
| 432 cinfo->min_DCT_scaled_size; | |
| 433 v_in_group = (compptr->v_samp_factor * compptr->DCT_scaled_size) / | |
| 434 cinfo->min_DCT_scaled_size; | |
| 435 h_out_group = cinfo->max_h_samp_factor; | |
| 436 v_out_group = cinfo->max_v_samp_factor; | |
| 437 upsample->rowgroup_height[ci] = v_in_group; /* save for use later */ | |
| 438 need_buffer = TRUE; | |
| 439 if (! compptr->component_needed) { | |
| 440 /* Don't bother to upsample an uninteresting component. */ | |
| 441 upsample->methods[ci] = noop_upsample; | |
| 442 need_buffer = FALSE; | |
| 443 } else if (h_in_group == h_out_group && v_in_group == v_out_group) { | |
| 444 /* Fullsize components can be processed without any work. */ | |
| 445 upsample->methods[ci] = fullsize_upsample; | |
| 446 need_buffer = FALSE; | |
| 447 } else if (h_in_group * 2 == h_out_group && | |
| 448 v_in_group == v_out_group) { | |
| 449 /* Special cases for 2h1v upsampling */ | |
| 450 if (do_fancy && compptr->downsampled_width > 2) | |
| 451 upsample->methods[ci] = h2v1_fancy_upsample; | |
| 452 else | |
| 453 upsample->methods[ci] = h2v1_upsample; | |
| 454 } else if (h_in_group * 2 == h_out_group && | |
| 455 v_in_group * 2 == v_out_group) { | |
| 456 /* Special cases for 2h2v upsampling */ | |
| 457 if (do_fancy && compptr->downsampled_width > 2) { | |
| 458 upsample->methods[ci] = h2v2_fancy_upsample; | |
| 459 upsample->pub.need_context_rows = TRUE; | |
| 460 } else | |
| 461 upsample->methods[ci] = h2v2_upsample; | |
| 462 } else if ((h_out_group % h_in_group) == 0 && | |
| 463 (v_out_group % v_in_group) == 0) { | |
| 464 /* Generic integral-factors upsampling method */ | |
| 465 upsample->methods[ci] = int_upsample; | |
| 466 upsample->h_expand[ci] = (UINT8) (h_out_group / h_in_group); | |
| 467 upsample->v_expand[ci] = (UINT8) (v_out_group / v_in_group); | |
| 468 } else | |
| 469 ERREXIT(cinfo, JERR_FRACT_SAMPLE_NOTIMPL); | |
| 470 if (need_buffer) { | |
| 471 upsample->color_buf[ci] = (*cinfo->mem->alloc_sarray) | |
| 472 ((j_common_ptr) cinfo, JPOOL_IMAGE, | |
| 473 (JDIMENSION) jround_up((long) cinfo->output_width, | |
| 474 (long) cinfo->max_h_samp_factor), | |
| 475 (JDIMENSION) cinfo->max_v_samp_factor); | |
| 476 } | |
| 477 } | |
| 478 } | |
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Chromium Code Reviews
Issue 1705523002:
Remove libjpeg and libjpeg_turbo. (Closed)
Base URL: https://github.com/domokit/mojo.git@master