hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1 | /* |
| 2 | * transupp.c |
| 3 | * |
noel@chromium.org | 3395bcc | 2014-04-14 06:56:00 +0000 | [diff] [blame] | 4 | * This file was part of the Independent JPEG Group's software: |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 5 | * Copyright (C) 1997-2019, Thomas G. Lane, Guido Vollbeding. |
noel@chromium.org | 3395bcc | 2014-04-14 06:56:00 +0000 | [diff] [blame] | 6 | * libjpeg-turbo Modifications: |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 7 | * Copyright (C) 2010, 2017, D. R. Commander. |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 8 | * For conditions of distribution and use, see the accompanying README.ijg |
| 9 | * file. |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 10 | * |
| 11 | * This file contains image transformation routines and other utility code |
| 12 | * used by the jpegtran sample application. These are NOT part of the core |
| 13 | * JPEG library. But we keep these routines separate from jpegtran.c to |
| 14 | * ease the task of maintaining jpegtran-like programs that have other user |
| 15 | * interfaces. |
| 16 | */ |
| 17 | |
| 18 | /* Although this file really shouldn't have access to the library internals, |
| 19 | * it's helpful to let it call jround_up() and jcopy_block_row(). |
| 20 | */ |
| 21 | #define JPEG_INTERNALS |
| 22 | |
| 23 | #include "jinclude.h" |
| 24 | #include "jpeglib.h" |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 25 | #include "transupp.h" /* My own external interface */ |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 26 | #include "jpegcomp.h" |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 27 | #include <ctype.h> /* to declare isdigit() */ |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 28 | |
| 29 | |
| 30 | #if JPEG_LIB_VERSION >= 70 |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 31 | #define dstinfo_min_DCT_h_scaled_size dstinfo->min_DCT_h_scaled_size |
| 32 | #define dstinfo_min_DCT_v_scaled_size dstinfo->min_DCT_v_scaled_size |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 33 | #else |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 34 | #define dstinfo_min_DCT_h_scaled_size DCTSIZE |
| 35 | #define dstinfo_min_DCT_v_scaled_size DCTSIZE |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 36 | #endif |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 37 | |
| 38 | |
| 39 | #if TRANSFORMS_SUPPORTED |
| 40 | |
| 41 | /* |
| 42 | * Lossless image transformation routines. These routines work on DCT |
| 43 | * coefficient arrays and thus do not require any lossy decompression |
| 44 | * or recompression of the image. |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 45 | * Thanks to Guido Vollbeding for the initial design and code of this feature, |
| 46 | * and to Ben Jackson for introducing the cropping feature. |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 47 | * |
| 48 | * Horizontal flipping is done in-place, using a single top-to-bottom |
| 49 | * pass through the virtual source array. It will thus be much the |
| 50 | * fastest option for images larger than main memory. |
| 51 | * |
| 52 | * The other routines require a set of destination virtual arrays, so they |
| 53 | * need twice as much memory as jpegtran normally does. The destination |
| 54 | * arrays are always written in normal scan order (top to bottom) because |
| 55 | * the virtual array manager expects this. The source arrays will be scanned |
| 56 | * in the corresponding order, which means multiple passes through the source |
| 57 | * arrays for most of the transforms. That could result in much thrashing |
| 58 | * if the image is larger than main memory. |
| 59 | * |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 60 | * If cropping or trimming is involved, the destination arrays may be smaller |
| 61 | * than the source arrays. Note it is not possible to do horizontal flip |
| 62 | * in-place when a nonzero Y crop offset is specified, since we'd have to move |
| 63 | * data from one block row to another but the virtual array manager doesn't |
| 64 | * guarantee we can touch more than one row at a time. So in that case, |
| 65 | * we have to use a separate destination array. |
| 66 | * |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 67 | * Some notes about the operating environment of the individual transform |
| 68 | * routines: |
| 69 | * 1. Both the source and destination virtual arrays are allocated from the |
| 70 | * source JPEG object, and therefore should be manipulated by calling the |
| 71 | * source's memory manager. |
| 72 | * 2. The destination's component count should be used. It may be smaller |
| 73 | * than the source's when forcing to grayscale. |
| 74 | * 3. Likewise the destination's sampling factors should be used. When |
| 75 | * forcing to grayscale the destination's sampling factors will be all 1, |
| 76 | * and we may as well take that as the effective iMCU size. |
| 77 | * 4. When "trim" is in effect, the destination's dimensions will be the |
| 78 | * trimmed values but the source's will be untrimmed. |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 79 | * 5. When "crop" is in effect, the destination's dimensions will be the |
| 80 | * cropped values but the source's will be uncropped. Each transform |
| 81 | * routine is responsible for picking up source data starting at the |
| 82 | * correct X and Y offset for the crop region. (The X and Y offsets |
| 83 | * passed to the transform routines are measured in iMCU blocks of the |
| 84 | * destination.) |
| 85 | * 6. All the routines assume that the source and destination buffers are |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 86 | * padded out to a full iMCU boundary. This is true, although for the |
| 87 | * source buffer it is an undocumented property of jdcoefct.c. |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 88 | */ |
| 89 | |
| 90 | |
| 91 | LOCAL(void) |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 92 | dequant_comp(j_decompress_ptr cinfo, jpeg_component_info *compptr, |
| 93 | jvirt_barray_ptr coef_array, JQUANT_TBL *qtblptr1) |
| 94 | { |
| 95 | JDIMENSION blk_x, blk_y; |
| 96 | int offset_y, k; |
| 97 | JQUANT_TBL *qtblptr; |
| 98 | JBLOCKARRAY buffer; |
| 99 | JBLOCKROW block; |
| 100 | JCOEFPTR ptr; |
| 101 | |
| 102 | qtblptr = compptr->quant_table; |
| 103 | for (blk_y = 0; blk_y < compptr->height_in_blocks; |
| 104 | blk_y += compptr->v_samp_factor) { |
| 105 | buffer = (*cinfo->mem->access_virt_barray) |
| 106 | ((j_common_ptr)cinfo, coef_array, blk_y, |
| 107 | (JDIMENSION)compptr->v_samp_factor, TRUE); |
| 108 | for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { |
| 109 | block = buffer[offset_y]; |
| 110 | for (blk_x = 0; blk_x < compptr->width_in_blocks; blk_x++) { |
| 111 | ptr = block[blk_x]; |
| 112 | for (k = 0; k < DCTSIZE2; k++) |
| 113 | if (qtblptr->quantval[k] != qtblptr1->quantval[k]) |
| 114 | ptr[k] *= qtblptr->quantval[k] / qtblptr1->quantval[k]; |
| 115 | } |
| 116 | } |
| 117 | } |
| 118 | } |
| 119 | |
| 120 | |
| 121 | LOCAL(void) |
| 122 | requant_comp(j_decompress_ptr cinfo, jpeg_component_info *compptr, |
| 123 | jvirt_barray_ptr coef_array, JQUANT_TBL *qtblptr1) |
| 124 | { |
| 125 | JDIMENSION blk_x, blk_y; |
| 126 | int offset_y, k; |
| 127 | JQUANT_TBL *qtblptr; |
| 128 | JBLOCKARRAY buffer; |
| 129 | JBLOCKROW block; |
| 130 | JCOEFPTR ptr; |
| 131 | JCOEF temp, qval; |
| 132 | |
| 133 | qtblptr = compptr->quant_table; |
| 134 | for (blk_y = 0; blk_y < compptr->height_in_blocks; |
| 135 | blk_y += compptr->v_samp_factor) { |
| 136 | buffer = (*cinfo->mem->access_virt_barray) |
| 137 | ((j_common_ptr)cinfo, coef_array, blk_y, |
| 138 | (JDIMENSION)compptr->v_samp_factor, TRUE); |
| 139 | for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { |
| 140 | block = buffer[offset_y]; |
| 141 | for (blk_x = 0; blk_x < compptr->width_in_blocks; blk_x++) { |
| 142 | ptr = block[blk_x]; |
| 143 | for (k = 0; k < DCTSIZE2; k++) { |
| 144 | temp = qtblptr->quantval[k]; |
| 145 | qval = qtblptr1->quantval[k]; |
| 146 | if (temp != qval) { |
| 147 | temp *= ptr[k]; |
| 148 | /* The following quantization code is copied from jcdctmgr.c */ |
| 149 | #ifdef FAST_DIVIDE |
| 150 | #define DIVIDE_BY(a, b) a /= b |
| 151 | #else |
| 152 | #define DIVIDE_BY(a, b) if (a >= b) a /= b; else a = 0 |
| 153 | #endif |
| 154 | if (temp < 0) { |
| 155 | temp = -temp; |
| 156 | temp += qval >> 1; /* for rounding */ |
| 157 | DIVIDE_BY(temp, qval); |
| 158 | temp = -temp; |
| 159 | } else { |
| 160 | temp += qval >> 1; /* for rounding */ |
| 161 | DIVIDE_BY(temp, qval); |
| 162 | } |
| 163 | ptr[k] = temp; |
| 164 | } |
| 165 | } |
| 166 | } |
| 167 | } |
| 168 | } |
| 169 | } |
| 170 | |
| 171 | |
| 172 | /* |
| 173 | * Calculate largest common denominator using Euclid's algorithm. |
| 174 | */ |
| 175 | LOCAL(JCOEF) |
| 176 | largest_common_denominator(JCOEF a, JCOEF b) |
| 177 | { |
| 178 | JCOEF c; |
| 179 | |
| 180 | do { |
| 181 | c = a % b; |
| 182 | a = b; |
| 183 | b = c; |
| 184 | } while (c); |
| 185 | |
| 186 | return a; |
| 187 | } |
| 188 | |
| 189 | |
| 190 | LOCAL(void) |
| 191 | adjust_quant(j_decompress_ptr srcinfo, jvirt_barray_ptr *src_coef_arrays, |
| 192 | j_decompress_ptr dropinfo, jvirt_barray_ptr *drop_coef_arrays, |
| 193 | boolean trim, j_compress_ptr dstinfo) |
| 194 | { |
| 195 | jpeg_component_info *compptr1, *compptr2; |
| 196 | JQUANT_TBL *qtblptr1, *qtblptr2, *qtblptr3; |
| 197 | int ci, k; |
| 198 | |
| 199 | for (ci = 0; ci < dstinfo->num_components && ci < dropinfo->num_components; |
| 200 | ci++) { |
| 201 | compptr1 = srcinfo->comp_info + ci; |
| 202 | compptr2 = dropinfo->comp_info + ci; |
| 203 | qtblptr1 = compptr1->quant_table; |
| 204 | qtblptr2 = compptr2->quant_table; |
| 205 | for (k = 0; k < DCTSIZE2; k++) { |
| 206 | if (qtblptr1->quantval[k] != qtblptr2->quantval[k]) { |
| 207 | if (trim) |
| 208 | requant_comp(dropinfo, compptr2, drop_coef_arrays[ci], qtblptr1); |
| 209 | else { |
| 210 | qtblptr3 = dstinfo->quant_tbl_ptrs[compptr1->quant_tbl_no]; |
| 211 | for (k = 0; k < DCTSIZE2; k++) |
| 212 | if (qtblptr1->quantval[k] != qtblptr2->quantval[k]) |
| 213 | qtblptr3->quantval[k] = |
| 214 | largest_common_denominator(qtblptr1->quantval[k], |
| 215 | qtblptr2->quantval[k]); |
| 216 | dequant_comp(srcinfo, compptr1, src_coef_arrays[ci], qtblptr3); |
| 217 | dequant_comp(dropinfo, compptr2, drop_coef_arrays[ci], qtblptr3); |
| 218 | } |
| 219 | break; |
| 220 | } |
| 221 | } |
| 222 | } |
| 223 | } |
| 224 | |
| 225 | |
| 226 | LOCAL(void) |
| 227 | do_drop(j_decompress_ptr srcinfo, j_compress_ptr dstinfo, |
| 228 | JDIMENSION x_crop_offset, JDIMENSION y_crop_offset, |
| 229 | jvirt_barray_ptr *src_coef_arrays, |
| 230 | j_decompress_ptr dropinfo, jvirt_barray_ptr *drop_coef_arrays, |
| 231 | JDIMENSION drop_width, JDIMENSION drop_height) |
| 232 | /* Drop (insert) the contents of another image into the source image. If the |
| 233 | * number of components in the drop image is smaller than the number of |
| 234 | * components in the destination image, then we fill in the remaining |
| 235 | * components with zero. This allows for dropping the contents of grayscale |
| 236 | * images into (arbitrarily sampled) color images. |
| 237 | */ |
| 238 | { |
| 239 | JDIMENSION comp_width, comp_height; |
| 240 | JDIMENSION blk_y, x_drop_blocks, y_drop_blocks; |
| 241 | int ci, offset_y; |
| 242 | JBLOCKARRAY src_buffer, dst_buffer; |
| 243 | jpeg_component_info *compptr; |
| 244 | |
| 245 | for (ci = 0; ci < dstinfo->num_components; ci++) { |
| 246 | compptr = dstinfo->comp_info + ci; |
| 247 | comp_width = drop_width * compptr->h_samp_factor; |
| 248 | comp_height = drop_height * compptr->v_samp_factor; |
| 249 | x_drop_blocks = x_crop_offset * compptr->h_samp_factor; |
| 250 | y_drop_blocks = y_crop_offset * compptr->v_samp_factor; |
| 251 | for (blk_y = 0; blk_y < comp_height; blk_y += compptr->v_samp_factor) { |
| 252 | dst_buffer = (*srcinfo->mem->access_virt_barray) |
| 253 | ((j_common_ptr)srcinfo, src_coef_arrays[ci], blk_y + y_drop_blocks, |
| 254 | (JDIMENSION)compptr->v_samp_factor, TRUE); |
| 255 | if (ci < dropinfo->num_components) { |
| 256 | src_buffer = (*dropinfo->mem->access_virt_barray) |
| 257 | ((j_common_ptr)dropinfo, drop_coef_arrays[ci], blk_y, |
| 258 | (JDIMENSION)compptr->v_samp_factor, FALSE); |
| 259 | for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { |
| 260 | jcopy_block_row(src_buffer[offset_y], |
| 261 | dst_buffer[offset_y] + x_drop_blocks, comp_width); |
| 262 | } |
| 263 | } else { |
| 264 | for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { |
| 265 | MEMZERO(dst_buffer[offset_y] + x_drop_blocks, |
| 266 | comp_width * sizeof(JBLOCK)); |
| 267 | } |
| 268 | } |
| 269 | } |
| 270 | } |
| 271 | } |
| 272 | |
| 273 | |
| 274 | LOCAL(void) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 275 | do_crop(j_decompress_ptr srcinfo, j_compress_ptr dstinfo, |
| 276 | JDIMENSION x_crop_offset, JDIMENSION y_crop_offset, |
| 277 | jvirt_barray_ptr *src_coef_arrays, |
| 278 | jvirt_barray_ptr *dst_coef_arrays) |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 279 | /* Crop. This is only used when no rotate/flip is requested with the crop. */ |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 280 | { |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 281 | JDIMENSION dst_blk_y, x_crop_blocks, y_crop_blocks; |
| 282 | int ci, offset_y; |
| 283 | JBLOCKARRAY src_buffer, dst_buffer; |
| 284 | jpeg_component_info *compptr; |
| 285 | |
| 286 | /* We simply have to copy the right amount of data (the destination's |
| 287 | * image size) starting at the given X and Y offsets in the source. |
| 288 | */ |
| 289 | for (ci = 0; ci < dstinfo->num_components; ci++) { |
| 290 | compptr = dstinfo->comp_info + ci; |
| 291 | x_crop_blocks = x_crop_offset * compptr->h_samp_factor; |
| 292 | y_crop_blocks = y_crop_offset * compptr->v_samp_factor; |
| 293 | for (dst_blk_y = 0; dst_blk_y < compptr->height_in_blocks; |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 294 | dst_blk_y += compptr->v_samp_factor) { |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 295 | dst_buffer = (*srcinfo->mem->access_virt_barray) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 296 | ((j_common_ptr)srcinfo, dst_coef_arrays[ci], dst_blk_y, |
| 297 | (JDIMENSION)compptr->v_samp_factor, TRUE); |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 298 | src_buffer = (*srcinfo->mem->access_virt_barray) |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 299 | ((j_common_ptr)srcinfo, src_coef_arrays[ci], dst_blk_y + y_crop_blocks, |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 300 | (JDIMENSION)compptr->v_samp_factor, FALSE); |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 301 | for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 302 | jcopy_block_row(src_buffer[offset_y] + x_crop_blocks, |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 303 | dst_buffer[offset_y], compptr->width_in_blocks); |
| 304 | } |
| 305 | } |
| 306 | } |
| 307 | } |
| 308 | |
| 309 | |
| 310 | LOCAL(void) |
| 311 | do_crop_ext_zero(j_decompress_ptr srcinfo, j_compress_ptr dstinfo, |
| 312 | JDIMENSION x_crop_offset, JDIMENSION y_crop_offset, |
| 313 | jvirt_barray_ptr *src_coef_arrays, |
| 314 | jvirt_barray_ptr *dst_coef_arrays) |
| 315 | /* Crop. This is only used when no rotate/flip is requested with the crop. |
| 316 | * Extension: If the destination size is larger than the source, we fill in the |
| 317 | * expanded region with zero (neutral gray). Note that we also have to zero |
| 318 | * partial iMCUs at the right and bottom edge of the source image area in this |
| 319 | * case. |
| 320 | */ |
| 321 | { |
| 322 | JDIMENSION MCU_cols, MCU_rows, comp_width, comp_height; |
| 323 | JDIMENSION dst_blk_y, x_crop_blocks, y_crop_blocks; |
| 324 | int ci, offset_y; |
| 325 | JBLOCKARRAY src_buffer, dst_buffer; |
| 326 | jpeg_component_info *compptr; |
| 327 | |
| 328 | MCU_cols = srcinfo->output_width / |
| 329 | (dstinfo->max_h_samp_factor * dstinfo_min_DCT_h_scaled_size); |
| 330 | MCU_rows = srcinfo->output_height / |
| 331 | (dstinfo->max_v_samp_factor * dstinfo_min_DCT_v_scaled_size); |
| 332 | |
| 333 | for (ci = 0; ci < dstinfo->num_components; ci++) { |
| 334 | compptr = dstinfo->comp_info + ci; |
| 335 | comp_width = MCU_cols * compptr->h_samp_factor; |
| 336 | comp_height = MCU_rows * compptr->v_samp_factor; |
| 337 | x_crop_blocks = x_crop_offset * compptr->h_samp_factor; |
| 338 | y_crop_blocks = y_crop_offset * compptr->v_samp_factor; |
| 339 | for (dst_blk_y = 0; dst_blk_y < compptr->height_in_blocks; |
| 340 | dst_blk_y += compptr->v_samp_factor) { |
| 341 | dst_buffer = (*srcinfo->mem->access_virt_barray) |
| 342 | ((j_common_ptr)srcinfo, dst_coef_arrays[ci], dst_blk_y, |
| 343 | (JDIMENSION)compptr->v_samp_factor, TRUE); |
| 344 | if (dstinfo->_jpeg_height > srcinfo->output_height) { |
| 345 | if (dst_blk_y < y_crop_blocks || |
| 346 | dst_blk_y >= y_crop_blocks + comp_height) { |
| 347 | for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { |
| 348 | MEMZERO(dst_buffer[offset_y], |
| 349 | compptr->width_in_blocks * sizeof(JBLOCK)); |
| 350 | } |
| 351 | continue; |
| 352 | } |
| 353 | src_buffer = (*srcinfo->mem->access_virt_barray) |
| 354 | ((j_common_ptr)srcinfo, src_coef_arrays[ci], |
| 355 | dst_blk_y - y_crop_blocks, (JDIMENSION)compptr->v_samp_factor, |
| 356 | FALSE); |
| 357 | } else { |
| 358 | src_buffer = (*srcinfo->mem->access_virt_barray) |
| 359 | ((j_common_ptr)srcinfo, src_coef_arrays[ci], |
| 360 | dst_blk_y + y_crop_blocks, (JDIMENSION)compptr->v_samp_factor, |
| 361 | FALSE); |
| 362 | } |
| 363 | for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { |
| 364 | if (dstinfo->_jpeg_width > srcinfo->output_width) { |
| 365 | if (x_crop_blocks > 0) { |
| 366 | MEMZERO(dst_buffer[offset_y], x_crop_blocks * sizeof(JBLOCK)); |
| 367 | } |
| 368 | jcopy_block_row(src_buffer[offset_y], |
| 369 | dst_buffer[offset_y] + x_crop_blocks, comp_width); |
| 370 | if (compptr->width_in_blocks > x_crop_blocks + comp_width) { |
| 371 | MEMZERO(dst_buffer[offset_y] + x_crop_blocks + comp_width, |
| 372 | (compptr->width_in_blocks - x_crop_blocks - comp_width) * |
| 373 | sizeof(JBLOCK)); |
| 374 | } |
| 375 | } else { |
| 376 | jcopy_block_row(src_buffer[offset_y] + x_crop_blocks, |
| 377 | dst_buffer[offset_y], compptr->width_in_blocks); |
| 378 | } |
| 379 | } |
| 380 | } |
| 381 | } |
| 382 | } |
| 383 | |
| 384 | |
| 385 | LOCAL(void) |
| 386 | do_crop_ext_flat(j_decompress_ptr srcinfo, j_compress_ptr dstinfo, |
| 387 | JDIMENSION x_crop_offset, JDIMENSION y_crop_offset, |
| 388 | jvirt_barray_ptr *src_coef_arrays, |
| 389 | jvirt_barray_ptr *dst_coef_arrays) |
| 390 | /* Crop. This is only used when no rotate/flip is requested with the crop. |
| 391 | * Extension: The destination width is larger than the source, and we fill in |
| 392 | * the expanded region with the DC coefficient of the adjacent block. Note |
| 393 | * that we also have to fill partial iMCUs at the right and bottom edge of the |
| 394 | * source image area in this case. |
| 395 | */ |
| 396 | { |
| 397 | JDIMENSION MCU_cols, MCU_rows, comp_width, comp_height; |
| 398 | JDIMENSION dst_blk_x, dst_blk_y, x_crop_blocks, y_crop_blocks; |
| 399 | int ci, offset_y; |
| 400 | JCOEF dc; |
| 401 | JBLOCKARRAY src_buffer, dst_buffer; |
| 402 | jpeg_component_info *compptr; |
| 403 | |
| 404 | MCU_cols = srcinfo->output_width / |
| 405 | (dstinfo->max_h_samp_factor * dstinfo_min_DCT_h_scaled_size); |
| 406 | MCU_rows = srcinfo->output_height / |
| 407 | (dstinfo->max_v_samp_factor * dstinfo_min_DCT_v_scaled_size); |
| 408 | |
| 409 | for (ci = 0; ci < dstinfo->num_components; ci++) { |
| 410 | compptr = dstinfo->comp_info + ci; |
| 411 | comp_width = MCU_cols * compptr->h_samp_factor; |
| 412 | comp_height = MCU_rows * compptr->v_samp_factor; |
| 413 | x_crop_blocks = x_crop_offset * compptr->h_samp_factor; |
| 414 | y_crop_blocks = y_crop_offset * compptr->v_samp_factor; |
| 415 | for (dst_blk_y = 0; dst_blk_y < compptr->height_in_blocks; |
| 416 | dst_blk_y += compptr->v_samp_factor) { |
| 417 | dst_buffer = (*srcinfo->mem->access_virt_barray) |
| 418 | ((j_common_ptr)srcinfo, dst_coef_arrays[ci], dst_blk_y, |
| 419 | (JDIMENSION)compptr->v_samp_factor, TRUE); |
| 420 | if (dstinfo->_jpeg_height > srcinfo->output_height) { |
| 421 | if (dst_blk_y < y_crop_blocks || |
| 422 | dst_blk_y >= y_crop_blocks + comp_height) { |
| 423 | for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { |
| 424 | MEMZERO(dst_buffer[offset_y], |
| 425 | compptr->width_in_blocks * sizeof(JBLOCK)); |
| 426 | } |
| 427 | continue; |
| 428 | } |
| 429 | src_buffer = (*srcinfo->mem->access_virt_barray) |
| 430 | ((j_common_ptr)srcinfo, src_coef_arrays[ci], |
| 431 | dst_blk_y - y_crop_blocks, (JDIMENSION)compptr->v_samp_factor, |
| 432 | FALSE); |
| 433 | } else { |
| 434 | src_buffer = (*srcinfo->mem->access_virt_barray) |
| 435 | ((j_common_ptr)srcinfo, src_coef_arrays[ci], |
| 436 | dst_blk_y + y_crop_blocks, (JDIMENSION)compptr->v_samp_factor, |
| 437 | FALSE); |
| 438 | } |
| 439 | for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { |
| 440 | if (x_crop_blocks > 0) { |
| 441 | MEMZERO(dst_buffer[offset_y], x_crop_blocks * sizeof(JBLOCK)); |
| 442 | dc = src_buffer[offset_y][0][0]; |
| 443 | for (dst_blk_x = 0; dst_blk_x < x_crop_blocks; dst_blk_x++) { |
| 444 | dst_buffer[offset_y][dst_blk_x][0] = dc; |
| 445 | } |
| 446 | } |
| 447 | jcopy_block_row(src_buffer[offset_y], |
| 448 | dst_buffer[offset_y] + x_crop_blocks, comp_width); |
| 449 | if (compptr->width_in_blocks > x_crop_blocks + comp_width) { |
| 450 | MEMZERO(dst_buffer[offset_y] + x_crop_blocks + comp_width, |
| 451 | (compptr->width_in_blocks - x_crop_blocks - comp_width) * |
| 452 | sizeof(JBLOCK)); |
| 453 | dc = src_buffer[offset_y][comp_width - 1][0]; |
| 454 | for (dst_blk_x = x_crop_blocks + comp_width; |
| 455 | dst_blk_x < compptr->width_in_blocks; dst_blk_x++) { |
| 456 | dst_buffer[offset_y][dst_blk_x][0] = dc; |
| 457 | } |
| 458 | } |
| 459 | } |
| 460 | } |
| 461 | } |
| 462 | } |
| 463 | |
| 464 | |
| 465 | LOCAL(void) |
| 466 | do_crop_ext_reflect(j_decompress_ptr srcinfo, j_compress_ptr dstinfo, |
| 467 | JDIMENSION x_crop_offset, JDIMENSION y_crop_offset, |
| 468 | jvirt_barray_ptr *src_coef_arrays, |
| 469 | jvirt_barray_ptr *dst_coef_arrays) |
| 470 | /* Crop. This is only used when no rotate/flip is requested with the crop. |
| 471 | * Extension: The destination width is larger than the source, and we fill in |
| 472 | * the expanded region with repeated reflections of the source image. Note |
| 473 | * that we also have to fill partial iMCUs at the right and bottom edge of the |
| 474 | * source image area in this case. |
| 475 | */ |
| 476 | { |
| 477 | JDIMENSION MCU_cols, MCU_rows, comp_width, comp_height, src_blk_x; |
| 478 | JDIMENSION dst_blk_x, dst_blk_y, x_crop_blocks, y_crop_blocks; |
| 479 | int ci, k, offset_y; |
| 480 | JBLOCKARRAY src_buffer, dst_buffer; |
| 481 | JBLOCKROW src_row_ptr, dst_row_ptr; |
| 482 | JCOEFPTR src_ptr, dst_ptr; |
| 483 | jpeg_component_info *compptr; |
| 484 | |
| 485 | MCU_cols = srcinfo->output_width / |
| 486 | (dstinfo->max_h_samp_factor * dstinfo_min_DCT_h_scaled_size); |
| 487 | MCU_rows = srcinfo->output_height / |
| 488 | (dstinfo->max_v_samp_factor * dstinfo_min_DCT_v_scaled_size); |
| 489 | |
| 490 | for (ci = 0; ci < dstinfo->num_components; ci++) { |
| 491 | compptr = dstinfo->comp_info + ci; |
| 492 | comp_width = MCU_cols * compptr->h_samp_factor; |
| 493 | comp_height = MCU_rows * compptr->v_samp_factor; |
| 494 | x_crop_blocks = x_crop_offset * compptr->h_samp_factor; |
| 495 | y_crop_blocks = y_crop_offset * compptr->v_samp_factor; |
| 496 | for (dst_blk_y = 0; dst_blk_y < compptr->height_in_blocks; |
| 497 | dst_blk_y += compptr->v_samp_factor) { |
| 498 | dst_buffer = (*srcinfo->mem->access_virt_barray) |
| 499 | ((j_common_ptr)srcinfo, dst_coef_arrays[ci], dst_blk_y, |
| 500 | (JDIMENSION)compptr->v_samp_factor, TRUE); |
| 501 | if (dstinfo->_jpeg_height > srcinfo->output_height) { |
| 502 | if (dst_blk_y < y_crop_blocks || |
| 503 | dst_blk_y >= y_crop_blocks + comp_height) { |
| 504 | for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { |
| 505 | MEMZERO(dst_buffer[offset_y], |
| 506 | compptr->width_in_blocks * sizeof(JBLOCK)); |
| 507 | } |
| 508 | continue; |
| 509 | } |
| 510 | src_buffer = (*srcinfo->mem->access_virt_barray) |
| 511 | ((j_common_ptr)srcinfo, src_coef_arrays[ci], |
| 512 | dst_blk_y - y_crop_blocks, (JDIMENSION)compptr->v_samp_factor, |
| 513 | FALSE); |
| 514 | } else { |
| 515 | src_buffer = (*srcinfo->mem->access_virt_barray) |
| 516 | ((j_common_ptr)srcinfo, src_coef_arrays[ci], |
| 517 | dst_blk_y + y_crop_blocks, (JDIMENSION)compptr->v_samp_factor, |
| 518 | FALSE); |
| 519 | } |
| 520 | for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { |
| 521 | /* Copy source region */ |
| 522 | jcopy_block_row(src_buffer[offset_y], |
| 523 | dst_buffer[offset_y] + x_crop_blocks, comp_width); |
| 524 | if (x_crop_blocks > 0) { |
| 525 | /* Reflect to left */ |
| 526 | dst_row_ptr = dst_buffer[offset_y] + x_crop_blocks; |
| 527 | for (dst_blk_x = x_crop_blocks; dst_blk_x > 0;) { |
| 528 | src_row_ptr = dst_row_ptr; /* (re)set axis of reflection */ |
| 529 | for (src_blk_x = comp_width; src_blk_x > 0 && dst_blk_x > 0; |
| 530 | src_blk_x--, dst_blk_x--) { |
| 531 | dst_ptr = *(--dst_row_ptr); /* destination goes left */ |
| 532 | src_ptr = *src_row_ptr++; /* source goes right */ |
| 533 | /* This unrolled loop doesn't need to know which row it's on. */ |
| 534 | for (k = 0; k < DCTSIZE2; k += 2) { |
| 535 | *dst_ptr++ = *src_ptr++; /* copy even column */ |
| 536 | *dst_ptr++ = -(*src_ptr++); /* copy odd column with sign |
| 537 | change */ |
| 538 | } |
| 539 | } |
| 540 | } |
| 541 | } |
| 542 | if (compptr->width_in_blocks > x_crop_blocks + comp_width) { |
| 543 | /* Reflect to right */ |
| 544 | dst_row_ptr = dst_buffer[offset_y] + x_crop_blocks + comp_width; |
| 545 | for (dst_blk_x = compptr->width_in_blocks - x_crop_blocks - comp_width; |
| 546 | dst_blk_x > 0;) { |
| 547 | src_row_ptr = dst_row_ptr; /* (re)set axis of reflection */ |
| 548 | for (src_blk_x = comp_width; src_blk_x > 0 && dst_blk_x > 0; |
| 549 | src_blk_x--, dst_blk_x--) { |
| 550 | dst_ptr = *dst_row_ptr++; /* destination goes right */ |
| 551 | src_ptr = *(--src_row_ptr); /* source goes left */ |
| 552 | /* This unrolled loop doesn't need to know which row it's on. */ |
| 553 | for (k = 0; k < DCTSIZE2; k += 2) { |
| 554 | *dst_ptr++ = *src_ptr++; /* copy even column */ |
| 555 | *dst_ptr++ = -(*src_ptr++); /* copy odd column with sign |
| 556 | change */ |
| 557 | } |
| 558 | } |
| 559 | } |
| 560 | } |
| 561 | } |
| 562 | } |
| 563 | } |
| 564 | } |
| 565 | |
| 566 | |
| 567 | LOCAL(void) |
| 568 | do_wipe(j_decompress_ptr srcinfo, j_compress_ptr dstinfo, |
| 569 | JDIMENSION x_crop_offset, JDIMENSION y_crop_offset, |
| 570 | jvirt_barray_ptr *src_coef_arrays, |
| 571 | JDIMENSION drop_width, JDIMENSION drop_height) |
| 572 | /* Wipe - discard image contents of specified region and fill with zero |
| 573 | * (neutral gray) |
| 574 | */ |
| 575 | { |
| 576 | JDIMENSION x_wipe_blocks, wipe_width; |
| 577 | JDIMENSION y_wipe_blocks, wipe_bottom; |
| 578 | int ci, offset_y; |
| 579 | JBLOCKARRAY buffer; |
| 580 | jpeg_component_info *compptr; |
| 581 | |
| 582 | for (ci = 0; ci < dstinfo->num_components; ci++) { |
| 583 | compptr = dstinfo->comp_info + ci; |
| 584 | x_wipe_blocks = x_crop_offset * compptr->h_samp_factor; |
| 585 | wipe_width = drop_width * compptr->h_samp_factor; |
| 586 | y_wipe_blocks = y_crop_offset * compptr->v_samp_factor; |
| 587 | wipe_bottom = drop_height * compptr->v_samp_factor + y_wipe_blocks; |
| 588 | for (; y_wipe_blocks < wipe_bottom; |
| 589 | y_wipe_blocks += compptr->v_samp_factor) { |
| 590 | buffer = (*srcinfo->mem->access_virt_barray) |
| 591 | ((j_common_ptr)srcinfo, src_coef_arrays[ci], y_wipe_blocks, |
| 592 | (JDIMENSION)compptr->v_samp_factor, TRUE); |
| 593 | for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { |
| 594 | MEMZERO(buffer[offset_y] + x_wipe_blocks, wipe_width * sizeof(JBLOCK)); |
| 595 | } |
| 596 | } |
| 597 | } |
| 598 | } |
| 599 | |
| 600 | |
| 601 | LOCAL(void) |
| 602 | do_flatten(j_decompress_ptr srcinfo, j_compress_ptr dstinfo, |
| 603 | JDIMENSION x_crop_offset, JDIMENSION y_crop_offset, |
| 604 | jvirt_barray_ptr *src_coef_arrays, |
| 605 | JDIMENSION drop_width, JDIMENSION drop_height) |
| 606 | /* Flatten - discard image contents of specified region, similarly to wipe, |
| 607 | * but fill with the average of adjacent blocks instead of zero. |
| 608 | */ |
| 609 | { |
| 610 | JDIMENSION x_wipe_blocks, wipe_width, wipe_right; |
| 611 | JDIMENSION y_wipe_blocks, wipe_bottom, blk_x; |
| 612 | int ci, offset_y, dc_left_value, dc_right_value, average; |
| 613 | JBLOCKARRAY buffer; |
| 614 | jpeg_component_info *compptr; |
| 615 | |
| 616 | for (ci = 0; ci < dstinfo->num_components; ci++) { |
| 617 | compptr = dstinfo->comp_info + ci; |
| 618 | x_wipe_blocks = x_crop_offset * compptr->h_samp_factor; |
| 619 | wipe_width = drop_width * compptr->h_samp_factor; |
| 620 | wipe_right = wipe_width + x_wipe_blocks; |
| 621 | y_wipe_blocks = y_crop_offset * compptr->v_samp_factor; |
| 622 | wipe_bottom = drop_height * compptr->v_samp_factor + y_wipe_blocks; |
| 623 | for (; y_wipe_blocks < wipe_bottom; |
| 624 | y_wipe_blocks += compptr->v_samp_factor) { |
| 625 | buffer = (*srcinfo->mem->access_virt_barray) |
| 626 | ((j_common_ptr)srcinfo, src_coef_arrays[ci], y_wipe_blocks, |
| 627 | (JDIMENSION)compptr->v_samp_factor, TRUE); |
| 628 | for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { |
| 629 | MEMZERO(buffer[offset_y] + x_wipe_blocks, wipe_width * sizeof(JBLOCK)); |
| 630 | if (x_wipe_blocks > 0) { |
| 631 | dc_left_value = buffer[offset_y][x_wipe_blocks - 1][0]; |
| 632 | if (wipe_right < compptr->width_in_blocks) { |
| 633 | dc_right_value = buffer[offset_y][wipe_right][0]; |
| 634 | average = (dc_left_value + dc_right_value) >> 1; |
| 635 | } else { |
| 636 | average = dc_left_value; |
| 637 | } |
| 638 | } else if (wipe_right < compptr->width_in_blocks) { |
| 639 | average = buffer[offset_y][wipe_right][0]; |
| 640 | } else continue; |
| 641 | for (blk_x = x_wipe_blocks; blk_x < wipe_right; blk_x++) { |
| 642 | buffer[offset_y][blk_x][0] = (JCOEF)average; |
| 643 | } |
| 644 | } |
| 645 | } |
| 646 | } |
| 647 | } |
| 648 | |
| 649 | |
| 650 | LOCAL(void) |
| 651 | do_reflect(j_decompress_ptr srcinfo, j_compress_ptr dstinfo, |
| 652 | JDIMENSION x_crop_offset, jvirt_barray_ptr *src_coef_arrays, |
| 653 | JDIMENSION drop_width, JDIMENSION drop_height) |
| 654 | /* Reflect - discard image contents of specified region, similarly to wipe, |
| 655 | * but fill with repeated reflections of the outside region instead of zero. |
| 656 | * NB: y_crop_offset is assumed to be zero. |
| 657 | */ |
| 658 | { |
| 659 | JDIMENSION x_wipe_blocks, wipe_width; |
| 660 | JDIMENSION y_wipe_blocks, wipe_bottom; |
| 661 | JDIMENSION src_blk_x, dst_blk_x; |
| 662 | int ci, k, offset_y; |
| 663 | JBLOCKARRAY buffer; |
| 664 | JBLOCKROW src_row_ptr, dst_row_ptr; |
| 665 | JCOEFPTR src_ptr, dst_ptr; |
| 666 | jpeg_component_info *compptr; |
| 667 | |
| 668 | for (ci = 0; ci < dstinfo->num_components; ci++) { |
| 669 | compptr = dstinfo->comp_info + ci; |
| 670 | x_wipe_blocks = x_crop_offset * compptr->h_samp_factor; |
| 671 | wipe_width = drop_width * compptr->h_samp_factor; |
| 672 | wipe_bottom = drop_height * compptr->v_samp_factor; |
| 673 | for (y_wipe_blocks = 0; y_wipe_blocks < wipe_bottom; |
| 674 | y_wipe_blocks += compptr->v_samp_factor) { |
| 675 | buffer = (*srcinfo->mem->access_virt_barray) |
| 676 | ((j_common_ptr)srcinfo, src_coef_arrays[ci], y_wipe_blocks, |
| 677 | (JDIMENSION)compptr->v_samp_factor, TRUE); |
| 678 | for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { |
| 679 | if (x_wipe_blocks > 0) { |
| 680 | /* Reflect from left */ |
| 681 | dst_row_ptr = buffer[offset_y] + x_wipe_blocks; |
| 682 | for (dst_blk_x = wipe_width; dst_blk_x > 0;) { |
| 683 | src_row_ptr = dst_row_ptr; /* (re)set axis of reflection */ |
| 684 | for (src_blk_x = x_wipe_blocks; |
| 685 | src_blk_x > 0 && dst_blk_x > 0; src_blk_x--, dst_blk_x--) { |
| 686 | dst_ptr = *dst_row_ptr++; /* destination goes right */ |
| 687 | src_ptr = *(--src_row_ptr); /* source goes left */ |
| 688 | /* this unrolled loop doesn't need to know which row it's on... */ |
| 689 | for (k = 0; k < DCTSIZE2; k += 2) { |
| 690 | *dst_ptr++ = *src_ptr++; /* copy even column */ |
| 691 | *dst_ptr++ = -(*src_ptr++); /* copy odd column with sign change */ |
| 692 | } |
| 693 | } |
| 694 | } |
| 695 | } else if (compptr->width_in_blocks > x_wipe_blocks + wipe_width) { |
| 696 | /* Reflect from right */ |
| 697 | dst_row_ptr = buffer[offset_y] + x_wipe_blocks + wipe_width; |
| 698 | for (dst_blk_x = wipe_width; dst_blk_x > 0;) { |
| 699 | src_row_ptr = dst_row_ptr; /* (re)set axis of reflection */ |
| 700 | src_blk_x = compptr->width_in_blocks - x_wipe_blocks - wipe_width; |
| 701 | for (; src_blk_x > 0 && dst_blk_x > 0; src_blk_x--, dst_blk_x--) { |
| 702 | dst_ptr = *(--dst_row_ptr); /* destination goes left */ |
| 703 | src_ptr = *src_row_ptr++; /* source goes right */ |
| 704 | /* this unrolled loop doesn't need to know which row it's on... */ |
| 705 | for (k = 0; k < DCTSIZE2; k += 2) { |
| 706 | *dst_ptr++ = *src_ptr++; /* copy even column */ |
| 707 | *dst_ptr++ = -(*src_ptr++); /* copy odd column with sign change */ |
| 708 | } |
| 709 | } |
| 710 | } |
| 711 | } else { |
| 712 | MEMZERO(buffer[offset_y] + x_wipe_blocks, |
| 713 | wipe_width * sizeof(JBLOCK)); |
| 714 | } |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 715 | } |
| 716 | } |
| 717 | } |
| 718 | } |
| 719 | |
| 720 | |
| 721 | LOCAL(void) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 722 | do_flip_h_no_crop(j_decompress_ptr srcinfo, j_compress_ptr dstinfo, |
| 723 | JDIMENSION x_crop_offset, jvirt_barray_ptr *src_coef_arrays) |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 724 | /* Horizontal flip; done in-place, so no separate dest array is required. |
| 725 | * NB: this only works when y_crop_offset is zero. |
| 726 | */ |
| 727 | { |
| 728 | JDIMENSION MCU_cols, comp_width, blk_x, blk_y, x_crop_blocks; |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 729 | int ci, k, offset_y; |
| 730 | JBLOCKARRAY buffer; |
| 731 | JCOEFPTR ptr1, ptr2; |
| 732 | JCOEF temp1, temp2; |
| 733 | jpeg_component_info *compptr; |
| 734 | |
| 735 | /* Horizontal mirroring of DCT blocks is accomplished by swapping |
| 736 | * pairs of blocks in-place. Within a DCT block, we perform horizontal |
| 737 | * mirroring by changing the signs of odd-numbered columns. |
| 738 | * Partial iMCUs at the right edge are left untouched. |
| 739 | */ |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 740 | MCU_cols = srcinfo->output_width / |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 741 | (dstinfo->max_h_samp_factor * dstinfo_min_DCT_h_scaled_size); |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 742 | |
| 743 | for (ci = 0; ci < dstinfo->num_components; ci++) { |
| 744 | compptr = dstinfo->comp_info + ci; |
| 745 | comp_width = MCU_cols * compptr->h_samp_factor; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 746 | x_crop_blocks = x_crop_offset * compptr->h_samp_factor; |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 747 | for (blk_y = 0; blk_y < compptr->height_in_blocks; |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 748 | blk_y += compptr->v_samp_factor) { |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 749 | buffer = (*srcinfo->mem->access_virt_barray) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 750 | ((j_common_ptr)srcinfo, src_coef_arrays[ci], blk_y, |
| 751 | (JDIMENSION)compptr->v_samp_factor, TRUE); |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 752 | for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 753 | /* Do the mirroring */ |
| 754 | for (blk_x = 0; blk_x * 2 < comp_width; blk_x++) { |
| 755 | ptr1 = buffer[offset_y][blk_x]; |
| 756 | ptr2 = buffer[offset_y][comp_width - blk_x - 1]; |
| 757 | /* this unrolled loop doesn't need to know which row it's on... */ |
| 758 | for (k = 0; k < DCTSIZE2; k += 2) { |
| 759 | temp1 = *ptr1; /* swap even column */ |
| 760 | temp2 = *ptr2; |
| 761 | *ptr1++ = temp2; |
| 762 | *ptr2++ = temp1; |
| 763 | temp1 = *ptr1; /* swap odd column with sign change */ |
| 764 | temp2 = *ptr2; |
| 765 | *ptr1++ = -temp2; |
| 766 | *ptr2++ = -temp1; |
| 767 | } |
| 768 | } |
| 769 | if (x_crop_blocks > 0) { |
| 770 | /* Now left-justify the portion of the data to be kept. |
| 771 | * We can't use a single jcopy_block_row() call because that routine |
| 772 | * depends on memcpy(), whose behavior is unspecified for overlapping |
| 773 | * source and destination areas. Sigh. |
| 774 | */ |
| 775 | for (blk_x = 0; blk_x < compptr->width_in_blocks; blk_x++) { |
| 776 | jcopy_block_row(buffer[offset_y] + blk_x + x_crop_blocks, |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 777 | buffer[offset_y] + blk_x, (JDIMENSION)1); |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 778 | } |
| 779 | } |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 780 | } |
| 781 | } |
| 782 | } |
| 783 | } |
| 784 | |
| 785 | |
| 786 | LOCAL(void) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 787 | do_flip_h(j_decompress_ptr srcinfo, j_compress_ptr dstinfo, |
| 788 | JDIMENSION x_crop_offset, JDIMENSION y_crop_offset, |
| 789 | jvirt_barray_ptr *src_coef_arrays, |
| 790 | jvirt_barray_ptr *dst_coef_arrays) |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 791 | /* Horizontal flip in general cropping case */ |
| 792 | { |
| 793 | JDIMENSION MCU_cols, comp_width, dst_blk_x, dst_blk_y; |
| 794 | JDIMENSION x_crop_blocks, y_crop_blocks; |
| 795 | int ci, k, offset_y; |
| 796 | JBLOCKARRAY src_buffer, dst_buffer; |
| 797 | JBLOCKROW src_row_ptr, dst_row_ptr; |
| 798 | JCOEFPTR src_ptr, dst_ptr; |
| 799 | jpeg_component_info *compptr; |
| 800 | |
| 801 | /* Here we must output into a separate array because we can't touch |
| 802 | * different rows of a single virtual array simultaneously. Otherwise, |
| 803 | * this is essentially the same as the routine above. |
| 804 | */ |
| 805 | MCU_cols = srcinfo->output_width / |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 806 | (dstinfo->max_h_samp_factor * dstinfo_min_DCT_h_scaled_size); |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 807 | |
| 808 | for (ci = 0; ci < dstinfo->num_components; ci++) { |
| 809 | compptr = dstinfo->comp_info + ci; |
| 810 | comp_width = MCU_cols * compptr->h_samp_factor; |
| 811 | x_crop_blocks = x_crop_offset * compptr->h_samp_factor; |
| 812 | y_crop_blocks = y_crop_offset * compptr->v_samp_factor; |
| 813 | for (dst_blk_y = 0; dst_blk_y < compptr->height_in_blocks; |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 814 | dst_blk_y += compptr->v_samp_factor) { |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 815 | dst_buffer = (*srcinfo->mem->access_virt_barray) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 816 | ((j_common_ptr)srcinfo, dst_coef_arrays[ci], dst_blk_y, |
| 817 | (JDIMENSION)compptr->v_samp_factor, TRUE); |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 818 | src_buffer = (*srcinfo->mem->access_virt_barray) |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 819 | ((j_common_ptr)srcinfo, src_coef_arrays[ci], dst_blk_y + y_crop_blocks, |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 820 | (JDIMENSION)compptr->v_samp_factor, FALSE); |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 821 | for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 822 | dst_row_ptr = dst_buffer[offset_y]; |
| 823 | src_row_ptr = src_buffer[offset_y]; |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 824 | for (dst_blk_x = 0; dst_blk_x < compptr->width_in_blocks; |
| 825 | dst_blk_x++) { |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 826 | if (x_crop_blocks + dst_blk_x < comp_width) { |
| 827 | /* Do the mirrorable blocks */ |
| 828 | dst_ptr = dst_row_ptr[dst_blk_x]; |
| 829 | src_ptr = src_row_ptr[comp_width - x_crop_blocks - dst_blk_x - 1]; |
| 830 | /* this unrolled loop doesn't need to know which row it's on... */ |
| 831 | for (k = 0; k < DCTSIZE2; k += 2) { |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 832 | *dst_ptr++ = *src_ptr++; /* copy even column */ |
| 833 | *dst_ptr++ = -(*src_ptr++); /* copy odd column with sign |
| 834 | change */ |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 835 | } |
| 836 | } else { |
| 837 | /* Copy last partial block(s) verbatim */ |
| 838 | jcopy_block_row(src_row_ptr + dst_blk_x + x_crop_blocks, |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 839 | dst_row_ptr + dst_blk_x, (JDIMENSION)1); |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 840 | } |
| 841 | } |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 842 | } |
| 843 | } |
| 844 | } |
| 845 | } |
| 846 | |
| 847 | |
| 848 | LOCAL(void) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 849 | do_flip_v(j_decompress_ptr srcinfo, j_compress_ptr dstinfo, |
| 850 | JDIMENSION x_crop_offset, JDIMENSION y_crop_offset, |
| 851 | jvirt_barray_ptr *src_coef_arrays, |
| 852 | jvirt_barray_ptr *dst_coef_arrays) |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 853 | /* Vertical flip */ |
| 854 | { |
| 855 | JDIMENSION MCU_rows, comp_height, dst_blk_x, dst_blk_y; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 856 | JDIMENSION x_crop_blocks, y_crop_blocks; |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 857 | int ci, i, j, offset_y; |
| 858 | JBLOCKARRAY src_buffer, dst_buffer; |
| 859 | JBLOCKROW src_row_ptr, dst_row_ptr; |
| 860 | JCOEFPTR src_ptr, dst_ptr; |
| 861 | jpeg_component_info *compptr; |
| 862 | |
| 863 | /* We output into a separate array because we can't touch different |
| 864 | * rows of the source virtual array simultaneously. Otherwise, this |
| 865 | * is a pretty straightforward analog of horizontal flip. |
| 866 | * Within a DCT block, vertical mirroring is done by changing the signs |
| 867 | * of odd-numbered rows. |
| 868 | * Partial iMCUs at the bottom edge are copied verbatim. |
| 869 | */ |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 870 | MCU_rows = srcinfo->output_height / |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 871 | (dstinfo->max_v_samp_factor * dstinfo_min_DCT_v_scaled_size); |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 872 | |
| 873 | for (ci = 0; ci < dstinfo->num_components; ci++) { |
| 874 | compptr = dstinfo->comp_info + ci; |
| 875 | comp_height = MCU_rows * compptr->v_samp_factor; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 876 | x_crop_blocks = x_crop_offset * compptr->h_samp_factor; |
| 877 | y_crop_blocks = y_crop_offset * compptr->v_samp_factor; |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 878 | for (dst_blk_y = 0; dst_blk_y < compptr->height_in_blocks; |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 879 | dst_blk_y += compptr->v_samp_factor) { |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 880 | dst_buffer = (*srcinfo->mem->access_virt_barray) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 881 | ((j_common_ptr)srcinfo, dst_coef_arrays[ci], dst_blk_y, |
| 882 | (JDIMENSION)compptr->v_samp_factor, TRUE); |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 883 | if (y_crop_blocks + dst_blk_y < comp_height) { |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 884 | /* Row is within the mirrorable area. */ |
| 885 | src_buffer = (*srcinfo->mem->access_virt_barray) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 886 | ((j_common_ptr)srcinfo, src_coef_arrays[ci], |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 887 | comp_height - y_crop_blocks - dst_blk_y - |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 888 | (JDIMENSION)compptr->v_samp_factor, |
| 889 | (JDIMENSION)compptr->v_samp_factor, FALSE); |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 890 | } else { |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 891 | /* Bottom-edge blocks will be copied verbatim. */ |
| 892 | src_buffer = (*srcinfo->mem->access_virt_barray) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 893 | ((j_common_ptr)srcinfo, src_coef_arrays[ci], |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 894 | dst_blk_y + y_crop_blocks, |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 895 | (JDIMENSION)compptr->v_samp_factor, FALSE); |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 896 | } |
| 897 | for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 898 | if (y_crop_blocks + dst_blk_y < comp_height) { |
| 899 | /* Row is within the mirrorable area. */ |
| 900 | dst_row_ptr = dst_buffer[offset_y]; |
| 901 | src_row_ptr = src_buffer[compptr->v_samp_factor - offset_y - 1]; |
| 902 | src_row_ptr += x_crop_blocks; |
| 903 | for (dst_blk_x = 0; dst_blk_x < compptr->width_in_blocks; |
| 904 | dst_blk_x++) { |
| 905 | dst_ptr = dst_row_ptr[dst_blk_x]; |
| 906 | src_ptr = src_row_ptr[dst_blk_x]; |
| 907 | for (i = 0; i < DCTSIZE; i += 2) { |
| 908 | /* copy even row */ |
| 909 | for (j = 0; j < DCTSIZE; j++) |
| 910 | *dst_ptr++ = *src_ptr++; |
| 911 | /* copy odd row with sign change */ |
| 912 | for (j = 0; j < DCTSIZE; j++) |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 913 | *dst_ptr++ = -(*src_ptr++); |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 914 | } |
| 915 | } |
| 916 | } else { |
| 917 | /* Just copy row verbatim. */ |
| 918 | jcopy_block_row(src_buffer[offset_y] + x_crop_blocks, |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 919 | dst_buffer[offset_y], compptr->width_in_blocks); |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 920 | } |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 921 | } |
| 922 | } |
| 923 | } |
| 924 | } |
| 925 | |
| 926 | |
| 927 | LOCAL(void) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 928 | do_transpose(j_decompress_ptr srcinfo, j_compress_ptr dstinfo, |
| 929 | JDIMENSION x_crop_offset, JDIMENSION y_crop_offset, |
| 930 | jvirt_barray_ptr *src_coef_arrays, |
| 931 | jvirt_barray_ptr *dst_coef_arrays) |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 932 | /* Transpose source into destination */ |
| 933 | { |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 934 | JDIMENSION dst_blk_x, dst_blk_y, x_crop_blocks, y_crop_blocks; |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 935 | int ci, i, j, offset_x, offset_y; |
| 936 | JBLOCKARRAY src_buffer, dst_buffer; |
| 937 | JCOEFPTR src_ptr, dst_ptr; |
| 938 | jpeg_component_info *compptr; |
| 939 | |
| 940 | /* Transposing pixels within a block just requires transposing the |
| 941 | * DCT coefficients. |
| 942 | * Partial iMCUs at the edges require no special treatment; we simply |
| 943 | * process all the available DCT blocks for every component. |
| 944 | */ |
| 945 | for (ci = 0; ci < dstinfo->num_components; ci++) { |
| 946 | compptr = dstinfo->comp_info + ci; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 947 | x_crop_blocks = x_crop_offset * compptr->h_samp_factor; |
| 948 | y_crop_blocks = y_crop_offset * compptr->v_samp_factor; |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 949 | for (dst_blk_y = 0; dst_blk_y < compptr->height_in_blocks; |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 950 | dst_blk_y += compptr->v_samp_factor) { |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 951 | dst_buffer = (*srcinfo->mem->access_virt_barray) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 952 | ((j_common_ptr)srcinfo, dst_coef_arrays[ci], dst_blk_y, |
| 953 | (JDIMENSION)compptr->v_samp_factor, TRUE); |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 954 | for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 955 | for (dst_blk_x = 0; dst_blk_x < compptr->width_in_blocks; |
| 956 | dst_blk_x += compptr->h_samp_factor) { |
| 957 | src_buffer = (*srcinfo->mem->access_virt_barray) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 958 | ((j_common_ptr)srcinfo, src_coef_arrays[ci], |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 959 | dst_blk_x + x_crop_blocks, |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 960 | (JDIMENSION)compptr->h_samp_factor, FALSE); |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 961 | for (offset_x = 0; offset_x < compptr->h_samp_factor; offset_x++) { |
| 962 | dst_ptr = dst_buffer[offset_y][dst_blk_x + offset_x]; |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 963 | src_ptr = |
| 964 | src_buffer[offset_x][dst_blk_y + offset_y + y_crop_blocks]; |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 965 | for (i = 0; i < DCTSIZE; i++) |
| 966 | for (j = 0; j < DCTSIZE; j++) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 967 | dst_ptr[j * DCTSIZE + i] = src_ptr[i * DCTSIZE + j]; |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 968 | } |
| 969 | } |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 970 | } |
| 971 | } |
| 972 | } |
| 973 | } |
| 974 | |
| 975 | |
| 976 | LOCAL(void) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 977 | do_rot_90(j_decompress_ptr srcinfo, j_compress_ptr dstinfo, |
| 978 | JDIMENSION x_crop_offset, JDIMENSION y_crop_offset, |
| 979 | jvirt_barray_ptr *src_coef_arrays, |
| 980 | jvirt_barray_ptr *dst_coef_arrays) |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 981 | /* 90 degree rotation is equivalent to |
| 982 | * 1. Transposing the image; |
| 983 | * 2. Horizontal mirroring. |
| 984 | * These two steps are merged into a single processing routine. |
| 985 | */ |
| 986 | { |
| 987 | JDIMENSION MCU_cols, comp_width, dst_blk_x, dst_blk_y; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 988 | JDIMENSION x_crop_blocks, y_crop_blocks; |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 989 | int ci, i, j, offset_x, offset_y; |
| 990 | JBLOCKARRAY src_buffer, dst_buffer; |
| 991 | JCOEFPTR src_ptr, dst_ptr; |
| 992 | jpeg_component_info *compptr; |
| 993 | |
| 994 | /* Because of the horizontal mirror step, we can't process partial iMCUs |
| 995 | * at the (output) right edge properly. They just get transposed and |
| 996 | * not mirrored. |
| 997 | */ |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 998 | MCU_cols = srcinfo->output_height / |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 999 | (dstinfo->max_h_samp_factor * dstinfo_min_DCT_h_scaled_size); |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1000 | |
| 1001 | for (ci = 0; ci < dstinfo->num_components; ci++) { |
| 1002 | compptr = dstinfo->comp_info + ci; |
| 1003 | comp_width = MCU_cols * compptr->h_samp_factor; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1004 | x_crop_blocks = x_crop_offset * compptr->h_samp_factor; |
| 1005 | y_crop_blocks = y_crop_offset * compptr->v_samp_factor; |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1006 | for (dst_blk_y = 0; dst_blk_y < compptr->height_in_blocks; |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1007 | dst_blk_y += compptr->v_samp_factor) { |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1008 | dst_buffer = (*srcinfo->mem->access_virt_barray) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1009 | ((j_common_ptr)srcinfo, dst_coef_arrays[ci], dst_blk_y, |
| 1010 | (JDIMENSION)compptr->v_samp_factor, TRUE); |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1011 | for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1012 | for (dst_blk_x = 0; dst_blk_x < compptr->width_in_blocks; |
| 1013 | dst_blk_x += compptr->h_samp_factor) { |
| 1014 | if (x_crop_blocks + dst_blk_x < comp_width) { |
| 1015 | /* Block is within the mirrorable area. */ |
| 1016 | src_buffer = (*srcinfo->mem->access_virt_barray) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1017 | ((j_common_ptr)srcinfo, src_coef_arrays[ci], |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1018 | comp_width - x_crop_blocks - dst_blk_x - |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1019 | (JDIMENSION)compptr->h_samp_factor, |
| 1020 | (JDIMENSION)compptr->h_samp_factor, FALSE); |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1021 | } else { |
| 1022 | /* Edge blocks are transposed but not mirrored. */ |
| 1023 | src_buffer = (*srcinfo->mem->access_virt_barray) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1024 | ((j_common_ptr)srcinfo, src_coef_arrays[ci], |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1025 | dst_blk_x + x_crop_blocks, |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1026 | (JDIMENSION)compptr->h_samp_factor, FALSE); |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1027 | } |
| 1028 | for (offset_x = 0; offset_x < compptr->h_samp_factor; offset_x++) { |
| 1029 | dst_ptr = dst_buffer[offset_y][dst_blk_x + offset_x]; |
| 1030 | if (x_crop_blocks + dst_blk_x < comp_width) { |
| 1031 | /* Block is within the mirrorable area. */ |
| 1032 | src_ptr = src_buffer[compptr->h_samp_factor - offset_x - 1] |
| 1033 | [dst_blk_y + offset_y + y_crop_blocks]; |
| 1034 | for (i = 0; i < DCTSIZE; i++) { |
| 1035 | for (j = 0; j < DCTSIZE; j++) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1036 | dst_ptr[j * DCTSIZE + i] = src_ptr[i * DCTSIZE + j]; |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1037 | i++; |
| 1038 | for (j = 0; j < DCTSIZE; j++) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1039 | dst_ptr[j * DCTSIZE + i] = -src_ptr[i * DCTSIZE + j]; |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1040 | } |
| 1041 | } else { |
| 1042 | /* Edge blocks are transposed but not mirrored. */ |
| 1043 | src_ptr = src_buffer[offset_x] |
| 1044 | [dst_blk_y + offset_y + y_crop_blocks]; |
| 1045 | for (i = 0; i < DCTSIZE; i++) |
| 1046 | for (j = 0; j < DCTSIZE; j++) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1047 | dst_ptr[j * DCTSIZE + i] = src_ptr[i * DCTSIZE + j]; |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1048 | } |
| 1049 | } |
| 1050 | } |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1051 | } |
| 1052 | } |
| 1053 | } |
| 1054 | } |
| 1055 | |
| 1056 | |
| 1057 | LOCAL(void) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1058 | do_rot_270(j_decompress_ptr srcinfo, j_compress_ptr dstinfo, |
| 1059 | JDIMENSION x_crop_offset, JDIMENSION y_crop_offset, |
| 1060 | jvirt_barray_ptr *src_coef_arrays, |
| 1061 | jvirt_barray_ptr *dst_coef_arrays) |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1062 | /* 270 degree rotation is equivalent to |
| 1063 | * 1. Horizontal mirroring; |
| 1064 | * 2. Transposing the image. |
| 1065 | * These two steps are merged into a single processing routine. |
| 1066 | */ |
| 1067 | { |
| 1068 | JDIMENSION MCU_rows, comp_height, dst_blk_x, dst_blk_y; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1069 | JDIMENSION x_crop_blocks, y_crop_blocks; |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1070 | int ci, i, j, offset_x, offset_y; |
| 1071 | JBLOCKARRAY src_buffer, dst_buffer; |
| 1072 | JCOEFPTR src_ptr, dst_ptr; |
| 1073 | jpeg_component_info *compptr; |
| 1074 | |
| 1075 | /* Because of the horizontal mirror step, we can't process partial iMCUs |
| 1076 | * at the (output) bottom edge properly. They just get transposed and |
| 1077 | * not mirrored. |
| 1078 | */ |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1079 | MCU_rows = srcinfo->output_width / |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1080 | (dstinfo->max_v_samp_factor * dstinfo_min_DCT_v_scaled_size); |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1081 | |
| 1082 | for (ci = 0; ci < dstinfo->num_components; ci++) { |
| 1083 | compptr = dstinfo->comp_info + ci; |
| 1084 | comp_height = MCU_rows * compptr->v_samp_factor; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1085 | x_crop_blocks = x_crop_offset * compptr->h_samp_factor; |
| 1086 | y_crop_blocks = y_crop_offset * compptr->v_samp_factor; |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1087 | for (dst_blk_y = 0; dst_blk_y < compptr->height_in_blocks; |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1088 | dst_blk_y += compptr->v_samp_factor) { |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1089 | dst_buffer = (*srcinfo->mem->access_virt_barray) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1090 | ((j_common_ptr)srcinfo, dst_coef_arrays[ci], dst_blk_y, |
| 1091 | (JDIMENSION)compptr->v_samp_factor, TRUE); |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1092 | for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1093 | for (dst_blk_x = 0; dst_blk_x < compptr->width_in_blocks; |
| 1094 | dst_blk_x += compptr->h_samp_factor) { |
| 1095 | src_buffer = (*srcinfo->mem->access_virt_barray) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1096 | ((j_common_ptr)srcinfo, src_coef_arrays[ci], |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1097 | dst_blk_x + x_crop_blocks, |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1098 | (JDIMENSION)compptr->h_samp_factor, FALSE); |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1099 | for (offset_x = 0; offset_x < compptr->h_samp_factor; offset_x++) { |
| 1100 | dst_ptr = dst_buffer[offset_y][dst_blk_x + offset_x]; |
| 1101 | if (y_crop_blocks + dst_blk_y < comp_height) { |
| 1102 | /* Block is within the mirrorable area. */ |
| 1103 | src_ptr = src_buffer[offset_x] |
| 1104 | [comp_height - y_crop_blocks - dst_blk_y - offset_y - 1]; |
| 1105 | for (i = 0; i < DCTSIZE; i++) { |
| 1106 | for (j = 0; j < DCTSIZE; j++) { |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1107 | dst_ptr[j * DCTSIZE + i] = src_ptr[i * DCTSIZE + j]; |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1108 | j++; |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1109 | dst_ptr[j * DCTSIZE + i] = -src_ptr[i * DCTSIZE + j]; |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1110 | } |
| 1111 | } |
| 1112 | } else { |
| 1113 | /* Edge blocks are transposed but not mirrored. */ |
| 1114 | src_ptr = src_buffer[offset_x] |
| 1115 | [dst_blk_y + offset_y + y_crop_blocks]; |
| 1116 | for (i = 0; i < DCTSIZE; i++) |
| 1117 | for (j = 0; j < DCTSIZE; j++) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1118 | dst_ptr[j * DCTSIZE + i] = src_ptr[i * DCTSIZE + j]; |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1119 | } |
| 1120 | } |
| 1121 | } |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1122 | } |
| 1123 | } |
| 1124 | } |
| 1125 | } |
| 1126 | |
| 1127 | |
| 1128 | LOCAL(void) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1129 | do_rot_180(j_decompress_ptr srcinfo, j_compress_ptr dstinfo, |
| 1130 | JDIMENSION x_crop_offset, JDIMENSION y_crop_offset, |
| 1131 | jvirt_barray_ptr *src_coef_arrays, |
| 1132 | jvirt_barray_ptr *dst_coef_arrays) |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1133 | /* 180 degree rotation is equivalent to |
| 1134 | * 1. Vertical mirroring; |
| 1135 | * 2. Horizontal mirroring. |
| 1136 | * These two steps are merged into a single processing routine. |
| 1137 | */ |
| 1138 | { |
| 1139 | JDIMENSION MCU_cols, MCU_rows, comp_width, comp_height, dst_blk_x, dst_blk_y; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1140 | JDIMENSION x_crop_blocks, y_crop_blocks; |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1141 | int ci, i, j, offset_y; |
| 1142 | JBLOCKARRAY src_buffer, dst_buffer; |
| 1143 | JBLOCKROW src_row_ptr, dst_row_ptr; |
| 1144 | JCOEFPTR src_ptr, dst_ptr; |
| 1145 | jpeg_component_info *compptr; |
| 1146 | |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1147 | MCU_cols = srcinfo->output_width / |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1148 | (dstinfo->max_h_samp_factor * dstinfo_min_DCT_h_scaled_size); |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1149 | MCU_rows = srcinfo->output_height / |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1150 | (dstinfo->max_v_samp_factor * dstinfo_min_DCT_v_scaled_size); |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1151 | |
| 1152 | for (ci = 0; ci < dstinfo->num_components; ci++) { |
| 1153 | compptr = dstinfo->comp_info + ci; |
| 1154 | comp_width = MCU_cols * compptr->h_samp_factor; |
| 1155 | comp_height = MCU_rows * compptr->v_samp_factor; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1156 | x_crop_blocks = x_crop_offset * compptr->h_samp_factor; |
| 1157 | y_crop_blocks = y_crop_offset * compptr->v_samp_factor; |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1158 | for (dst_blk_y = 0; dst_blk_y < compptr->height_in_blocks; |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1159 | dst_blk_y += compptr->v_samp_factor) { |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1160 | dst_buffer = (*srcinfo->mem->access_virt_barray) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1161 | ((j_common_ptr)srcinfo, dst_coef_arrays[ci], dst_blk_y, |
| 1162 | (JDIMENSION)compptr->v_samp_factor, TRUE); |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1163 | if (y_crop_blocks + dst_blk_y < comp_height) { |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1164 | /* Row is within the vertically mirrorable area. */ |
| 1165 | src_buffer = (*srcinfo->mem->access_virt_barray) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1166 | ((j_common_ptr)srcinfo, src_coef_arrays[ci], |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1167 | comp_height - y_crop_blocks - dst_blk_y - |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1168 | (JDIMENSION)compptr->v_samp_factor, |
| 1169 | (JDIMENSION)compptr->v_samp_factor, FALSE); |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1170 | } else { |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1171 | /* Bottom-edge rows are only mirrored horizontally. */ |
| 1172 | src_buffer = (*srcinfo->mem->access_virt_barray) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1173 | ((j_common_ptr)srcinfo, src_coef_arrays[ci], |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1174 | dst_blk_y + y_crop_blocks, |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1175 | (JDIMENSION)compptr->v_samp_factor, FALSE); |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1176 | } |
| 1177 | for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1178 | dst_row_ptr = dst_buffer[offset_y]; |
| 1179 | if (y_crop_blocks + dst_blk_y < comp_height) { |
| 1180 | /* Row is within the mirrorable area. */ |
| 1181 | src_row_ptr = src_buffer[compptr->v_samp_factor - offset_y - 1]; |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1182 | for (dst_blk_x = 0; dst_blk_x < compptr->width_in_blocks; |
| 1183 | dst_blk_x++) { |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1184 | dst_ptr = dst_row_ptr[dst_blk_x]; |
| 1185 | if (x_crop_blocks + dst_blk_x < comp_width) { |
| 1186 | /* Process the blocks that can be mirrored both ways. */ |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1187 | src_ptr = |
| 1188 | src_row_ptr[comp_width - x_crop_blocks - dst_blk_x - 1]; |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1189 | for (i = 0; i < DCTSIZE; i += 2) { |
| 1190 | /* For even row, negate every odd column. */ |
| 1191 | for (j = 0; j < DCTSIZE; j += 2) { |
| 1192 | *dst_ptr++ = *src_ptr++; |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1193 | *dst_ptr++ = -(*src_ptr++); |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1194 | } |
| 1195 | /* For odd row, negate every even column. */ |
| 1196 | for (j = 0; j < DCTSIZE; j += 2) { |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1197 | *dst_ptr++ = -(*src_ptr++); |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1198 | *dst_ptr++ = *src_ptr++; |
| 1199 | } |
| 1200 | } |
| 1201 | } else { |
| 1202 | /* Any remaining right-edge blocks are only mirrored vertically. */ |
| 1203 | src_ptr = src_row_ptr[x_crop_blocks + dst_blk_x]; |
| 1204 | for (i = 0; i < DCTSIZE; i += 2) { |
| 1205 | for (j = 0; j < DCTSIZE; j++) |
| 1206 | *dst_ptr++ = *src_ptr++; |
| 1207 | for (j = 0; j < DCTSIZE; j++) |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1208 | *dst_ptr++ = -(*src_ptr++); |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1209 | } |
| 1210 | } |
| 1211 | } |
| 1212 | } else { |
| 1213 | /* Remaining rows are just mirrored horizontally. */ |
| 1214 | src_row_ptr = src_buffer[offset_y]; |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1215 | for (dst_blk_x = 0; dst_blk_x < compptr->width_in_blocks; |
| 1216 | dst_blk_x++) { |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1217 | if (x_crop_blocks + dst_blk_x < comp_width) { |
| 1218 | /* Process the blocks that can be mirrored. */ |
| 1219 | dst_ptr = dst_row_ptr[dst_blk_x]; |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1220 | src_ptr = |
| 1221 | src_row_ptr[comp_width - x_crop_blocks - dst_blk_x - 1]; |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1222 | for (i = 0; i < DCTSIZE2; i += 2) { |
| 1223 | *dst_ptr++ = *src_ptr++; |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1224 | *dst_ptr++ = -(*src_ptr++); |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1225 | } |
| 1226 | } else { |
| 1227 | /* Any remaining right-edge blocks are only copied. */ |
| 1228 | jcopy_block_row(src_row_ptr + dst_blk_x + x_crop_blocks, |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1229 | dst_row_ptr + dst_blk_x, (JDIMENSION)1); |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1230 | } |
| 1231 | } |
| 1232 | } |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1233 | } |
| 1234 | } |
| 1235 | } |
| 1236 | } |
| 1237 | |
| 1238 | |
| 1239 | LOCAL(void) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1240 | do_transverse(j_decompress_ptr srcinfo, j_compress_ptr dstinfo, |
| 1241 | JDIMENSION x_crop_offset, JDIMENSION y_crop_offset, |
| 1242 | jvirt_barray_ptr *src_coef_arrays, |
| 1243 | jvirt_barray_ptr *dst_coef_arrays) |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1244 | /* Transverse transpose is equivalent to |
| 1245 | * 1. 180 degree rotation; |
| 1246 | * 2. Transposition; |
| 1247 | * or |
| 1248 | * 1. Horizontal mirroring; |
| 1249 | * 2. Transposition; |
| 1250 | * 3. Horizontal mirroring. |
| 1251 | * These steps are merged into a single processing routine. |
| 1252 | */ |
| 1253 | { |
| 1254 | JDIMENSION MCU_cols, MCU_rows, comp_width, comp_height, dst_blk_x, dst_blk_y; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1255 | JDIMENSION x_crop_blocks, y_crop_blocks; |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1256 | int ci, i, j, offset_x, offset_y; |
| 1257 | JBLOCKARRAY src_buffer, dst_buffer; |
| 1258 | JCOEFPTR src_ptr, dst_ptr; |
| 1259 | jpeg_component_info *compptr; |
| 1260 | |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1261 | MCU_cols = srcinfo->output_height / |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1262 | (dstinfo->max_h_samp_factor * dstinfo_min_DCT_h_scaled_size); |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1263 | MCU_rows = srcinfo->output_width / |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1264 | (dstinfo->max_v_samp_factor * dstinfo_min_DCT_v_scaled_size); |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1265 | |
| 1266 | for (ci = 0; ci < dstinfo->num_components; ci++) { |
| 1267 | compptr = dstinfo->comp_info + ci; |
| 1268 | comp_width = MCU_cols * compptr->h_samp_factor; |
| 1269 | comp_height = MCU_rows * compptr->v_samp_factor; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1270 | x_crop_blocks = x_crop_offset * compptr->h_samp_factor; |
| 1271 | y_crop_blocks = y_crop_offset * compptr->v_samp_factor; |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1272 | for (dst_blk_y = 0; dst_blk_y < compptr->height_in_blocks; |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1273 | dst_blk_y += compptr->v_samp_factor) { |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1274 | dst_buffer = (*srcinfo->mem->access_virt_barray) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1275 | ((j_common_ptr)srcinfo, dst_coef_arrays[ci], dst_blk_y, |
| 1276 | (JDIMENSION)compptr->v_samp_factor, TRUE); |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1277 | for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1278 | for (dst_blk_x = 0; dst_blk_x < compptr->width_in_blocks; |
| 1279 | dst_blk_x += compptr->h_samp_factor) { |
| 1280 | if (x_crop_blocks + dst_blk_x < comp_width) { |
| 1281 | /* Block is within the mirrorable area. */ |
| 1282 | src_buffer = (*srcinfo->mem->access_virt_barray) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1283 | ((j_common_ptr)srcinfo, src_coef_arrays[ci], |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1284 | comp_width - x_crop_blocks - dst_blk_x - |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1285 | (JDIMENSION)compptr->h_samp_factor, |
| 1286 | (JDIMENSION)compptr->h_samp_factor, FALSE); |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1287 | } else { |
| 1288 | src_buffer = (*srcinfo->mem->access_virt_barray) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1289 | ((j_common_ptr)srcinfo, src_coef_arrays[ci], |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1290 | dst_blk_x + x_crop_blocks, |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1291 | (JDIMENSION)compptr->h_samp_factor, FALSE); |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1292 | } |
| 1293 | for (offset_x = 0; offset_x < compptr->h_samp_factor; offset_x++) { |
| 1294 | dst_ptr = dst_buffer[offset_y][dst_blk_x + offset_x]; |
| 1295 | if (y_crop_blocks + dst_blk_y < comp_height) { |
| 1296 | if (x_crop_blocks + dst_blk_x < comp_width) { |
| 1297 | /* Block is within the mirrorable area. */ |
| 1298 | src_ptr = src_buffer[compptr->h_samp_factor - offset_x - 1] |
| 1299 | [comp_height - y_crop_blocks - dst_blk_y - offset_y - 1]; |
| 1300 | for (i = 0; i < DCTSIZE; i++) { |
| 1301 | for (j = 0; j < DCTSIZE; j++) { |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1302 | dst_ptr[j * DCTSIZE + i] = src_ptr[i * DCTSIZE + j]; |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1303 | j++; |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1304 | dst_ptr[j * DCTSIZE + i] = -src_ptr[i * DCTSIZE + j]; |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1305 | } |
| 1306 | i++; |
| 1307 | for (j = 0; j < DCTSIZE; j++) { |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1308 | dst_ptr[j * DCTSIZE + i] = -src_ptr[i * DCTSIZE + j]; |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1309 | j++; |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1310 | dst_ptr[j * DCTSIZE + i] = src_ptr[i * DCTSIZE + j]; |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1311 | } |
| 1312 | } |
| 1313 | } else { |
| 1314 | /* Right-edge blocks are mirrored in y only */ |
| 1315 | src_ptr = src_buffer[offset_x] |
| 1316 | [comp_height - y_crop_blocks - dst_blk_y - offset_y - 1]; |
| 1317 | for (i = 0; i < DCTSIZE; i++) { |
| 1318 | for (j = 0; j < DCTSIZE; j++) { |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1319 | dst_ptr[j * DCTSIZE + i] = src_ptr[i * DCTSIZE + j]; |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1320 | j++; |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1321 | dst_ptr[j * DCTSIZE + i] = -src_ptr[i * DCTSIZE + j]; |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1322 | } |
| 1323 | } |
| 1324 | } |
| 1325 | } else { |
| 1326 | if (x_crop_blocks + dst_blk_x < comp_width) { |
| 1327 | /* Bottom-edge blocks are mirrored in x only */ |
| 1328 | src_ptr = src_buffer[compptr->h_samp_factor - offset_x - 1] |
| 1329 | [dst_blk_y + offset_y + y_crop_blocks]; |
| 1330 | for (i = 0; i < DCTSIZE; i++) { |
| 1331 | for (j = 0; j < DCTSIZE; j++) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1332 | dst_ptr[j * DCTSIZE + i] = src_ptr[i * DCTSIZE + j]; |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1333 | i++; |
| 1334 | for (j = 0; j < DCTSIZE; j++) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1335 | dst_ptr[j * DCTSIZE + i] = -src_ptr[i * DCTSIZE + j]; |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1336 | } |
| 1337 | } else { |
| 1338 | /* At lower right corner, just transpose, no mirroring */ |
| 1339 | src_ptr = src_buffer[offset_x] |
| 1340 | [dst_blk_y + offset_y + y_crop_blocks]; |
| 1341 | for (i = 0; i < DCTSIZE; i++) |
| 1342 | for (j = 0; j < DCTSIZE; j++) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1343 | dst_ptr[j * DCTSIZE + i] = src_ptr[i * DCTSIZE + j]; |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1344 | } |
| 1345 | } |
| 1346 | } |
| 1347 | } |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1348 | } |
| 1349 | } |
| 1350 | } |
| 1351 | } |
| 1352 | |
| 1353 | |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1354 | /* Parse an unsigned integer: subroutine for jtransform_parse_crop_spec. |
| 1355 | * Returns TRUE if valid integer found, FALSE if not. |
| 1356 | * *strptr is advanced over the digit string, and *result is set to its value. |
| 1357 | */ |
| 1358 | |
| 1359 | LOCAL(boolean) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1360 | jt_read_integer(const char **strptr, JDIMENSION *result) |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1361 | { |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1362 | const char *ptr = *strptr; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1363 | JDIMENSION val = 0; |
| 1364 | |
| 1365 | for (; isdigit(*ptr); ptr++) { |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1366 | val = val * 10 + (JDIMENSION)(*ptr - '0'); |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1367 | } |
| 1368 | *result = val; |
| 1369 | if (ptr == *strptr) |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1370 | return FALSE; /* oops, no digits */ |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1371 | *strptr = ptr; |
| 1372 | return TRUE; |
| 1373 | } |
| 1374 | |
| 1375 | |
| 1376 | /* Parse a crop specification (written in X11 geometry style). |
| 1377 | * The routine returns TRUE if the spec string is valid, FALSE if not. |
| 1378 | * |
| 1379 | * The crop spec string should have the format |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1380 | * <width>[{fr}]x<height>[{fr}]{+-}<xoffset>{+-}<yoffset> |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1381 | * where width, height, xoffset, and yoffset are unsigned integers. |
| 1382 | * Each of the elements can be omitted to indicate a default value. |
| 1383 | * (A weakness of this style is that it is not possible to omit xoffset |
| 1384 | * while specifying yoffset, since they look alike.) |
| 1385 | * |
| 1386 | * This code is loosely based on XParseGeometry from the X11 distribution. |
| 1387 | */ |
| 1388 | |
| 1389 | GLOBAL(boolean) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1390 | jtransform_parse_crop_spec(jpeg_transform_info *info, const char *spec) |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1391 | { |
| 1392 | info->crop = FALSE; |
| 1393 | info->crop_width_set = JCROP_UNSET; |
| 1394 | info->crop_height_set = JCROP_UNSET; |
| 1395 | info->crop_xoffset_set = JCROP_UNSET; |
| 1396 | info->crop_yoffset_set = JCROP_UNSET; |
| 1397 | |
| 1398 | if (isdigit(*spec)) { |
| 1399 | /* fetch width */ |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1400 | if (!jt_read_integer(&spec, &info->crop_width)) |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1401 | return FALSE; |
noel@chromium.org | 3395bcc | 2014-04-14 06:56:00 +0000 | [diff] [blame] | 1402 | if (*spec == 'f' || *spec == 'F') { |
| 1403 | spec++; |
| 1404 | info->crop_width_set = JCROP_FORCE; |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1405 | } else if (*spec == 'r' || *spec == 'R') { |
| 1406 | spec++; |
| 1407 | info->crop_width_set = JCROP_REFLECT; |
noel@chromium.org | 3395bcc | 2014-04-14 06:56:00 +0000 | [diff] [blame] | 1408 | } else |
| 1409 | info->crop_width_set = JCROP_POS; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1410 | } |
noel@chromium.org | 3395bcc | 2014-04-14 06:56:00 +0000 | [diff] [blame] | 1411 | if (*spec == 'x' || *spec == 'X') { |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1412 | /* fetch height */ |
| 1413 | spec++; |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1414 | if (!jt_read_integer(&spec, &info->crop_height)) |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1415 | return FALSE; |
noel@chromium.org | 3395bcc | 2014-04-14 06:56:00 +0000 | [diff] [blame] | 1416 | if (*spec == 'f' || *spec == 'F') { |
| 1417 | spec++; |
| 1418 | info->crop_height_set = JCROP_FORCE; |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1419 | } else if (*spec == 'r' || *spec == 'R') { |
| 1420 | spec++; |
| 1421 | info->crop_height_set = JCROP_REFLECT; |
noel@chromium.org | 3395bcc | 2014-04-14 06:56:00 +0000 | [diff] [blame] | 1422 | } else |
| 1423 | info->crop_height_set = JCROP_POS; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1424 | } |
| 1425 | if (*spec == '+' || *spec == '-') { |
| 1426 | /* fetch xoffset */ |
| 1427 | info->crop_xoffset_set = (*spec == '-') ? JCROP_NEG : JCROP_POS; |
| 1428 | spec++; |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1429 | if (!jt_read_integer(&spec, &info->crop_xoffset)) |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1430 | return FALSE; |
| 1431 | } |
| 1432 | if (*spec == '+' || *spec == '-') { |
| 1433 | /* fetch yoffset */ |
| 1434 | info->crop_yoffset_set = (*spec == '-') ? JCROP_NEG : JCROP_POS; |
| 1435 | spec++; |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1436 | if (!jt_read_integer(&spec, &info->crop_yoffset)) |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1437 | return FALSE; |
| 1438 | } |
| 1439 | /* We had better have gotten to the end of the string. */ |
| 1440 | if (*spec != '\0') |
| 1441 | return FALSE; |
| 1442 | info->crop = TRUE; |
| 1443 | return TRUE; |
| 1444 | } |
| 1445 | |
| 1446 | |
| 1447 | /* Trim off any partial iMCUs on the indicated destination edge */ |
| 1448 | |
| 1449 | LOCAL(void) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1450 | trim_right_edge(jpeg_transform_info *info, JDIMENSION full_width) |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1451 | { |
| 1452 | JDIMENSION MCU_cols; |
| 1453 | |
| 1454 | MCU_cols = info->output_width / info->iMCU_sample_width; |
| 1455 | if (MCU_cols > 0 && info->x_crop_offset + MCU_cols == |
| 1456 | full_width / info->iMCU_sample_width) |
| 1457 | info->output_width = MCU_cols * info->iMCU_sample_width; |
| 1458 | } |
| 1459 | |
| 1460 | LOCAL(void) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1461 | trim_bottom_edge(jpeg_transform_info *info, JDIMENSION full_height) |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1462 | { |
| 1463 | JDIMENSION MCU_rows; |
| 1464 | |
| 1465 | MCU_rows = info->output_height / info->iMCU_sample_height; |
| 1466 | if (MCU_rows > 0 && info->y_crop_offset + MCU_rows == |
| 1467 | full_height / info->iMCU_sample_height) |
| 1468 | info->output_height = MCU_rows * info->iMCU_sample_height; |
| 1469 | } |
| 1470 | |
| 1471 | |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1472 | /* Request any required workspace. |
| 1473 | * |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1474 | * This routine figures out the size that the output image will be |
| 1475 | * (which implies that all the transform parameters must be set before |
| 1476 | * it is called). |
| 1477 | * |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1478 | * We allocate the workspace virtual arrays from the source decompression |
| 1479 | * object, so that all the arrays (both the original data and the workspace) |
| 1480 | * will be taken into account while making memory management decisions. |
| 1481 | * Hence, this routine must be called after jpeg_read_header (which reads |
| 1482 | * the image dimensions) and before jpeg_read_coefficients (which realizes |
| 1483 | * the source's virtual arrays). |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1484 | * |
| 1485 | * This function returns FALSE right away if -perfect is given |
| 1486 | * and transformation is not perfect. Otherwise returns TRUE. |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1487 | */ |
| 1488 | |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1489 | GLOBAL(boolean) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1490 | jtransform_request_workspace(j_decompress_ptr srcinfo, |
| 1491 | jpeg_transform_info *info) |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1492 | { |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1493 | jvirt_barray_ptr *coef_arrays; |
| 1494 | boolean need_workspace, transpose_it; |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1495 | jpeg_component_info *compptr; |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1496 | JDIMENSION xoffset, yoffset, dtemp; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1497 | JDIMENSION width_in_iMCUs, height_in_iMCUs; |
| 1498 | JDIMENSION width_in_blocks, height_in_blocks; |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1499 | int itemp, ci, h_samp_factor, v_samp_factor; |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1500 | |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1501 | /* Determine number of components in output image */ |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1502 | if (info->force_grayscale && |
| 1503 | srcinfo->jpeg_color_space == JCS_YCbCr && |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1504 | srcinfo->num_components == 3) |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1505 | /* We'll only process the first component */ |
| 1506 | info->num_components = 1; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1507 | else |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1508 | /* Process all the components */ |
| 1509 | info->num_components = srcinfo->num_components; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1510 | |
| 1511 | /* Compute output image dimensions and related values. */ |
| 1512 | #if JPEG_LIB_VERSION >= 80 |
| 1513 | jpeg_core_output_dimensions(srcinfo); |
| 1514 | #else |
| 1515 | srcinfo->output_width = srcinfo->image_width; |
| 1516 | srcinfo->output_height = srcinfo->image_height; |
| 1517 | #endif |
| 1518 | |
| 1519 | /* Return right away if -perfect is given and transformation is not perfect. |
| 1520 | */ |
| 1521 | if (info->perfect) { |
| 1522 | if (info->num_components == 1) { |
| 1523 | if (!jtransform_perfect_transform(srcinfo->output_width, |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1524 | srcinfo->output_height, |
| 1525 | srcinfo->_min_DCT_h_scaled_size, |
| 1526 | srcinfo->_min_DCT_v_scaled_size, |
| 1527 | info->transform)) |
| 1528 | return FALSE; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1529 | } else { |
| 1530 | if (!jtransform_perfect_transform(srcinfo->output_width, |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1531 | srcinfo->output_height, |
| 1532 | srcinfo->max_h_samp_factor * srcinfo->_min_DCT_h_scaled_size, |
| 1533 | srcinfo->max_v_samp_factor * srcinfo->_min_DCT_v_scaled_size, |
| 1534 | info->transform)) |
| 1535 | return FALSE; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1536 | } |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1537 | } |
| 1538 | |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1539 | /* If there is only one output component, force the iMCU size to be 1; |
| 1540 | * else use the source iMCU size. (This allows us to do the right thing |
| 1541 | * when reducing color to grayscale, and also provides a handy way of |
| 1542 | * cleaning up "funny" grayscale images whose sampling factors are not 1x1.) |
| 1543 | */ |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1544 | switch (info->transform) { |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1545 | case JXFORM_TRANSPOSE: |
| 1546 | case JXFORM_TRANSVERSE: |
| 1547 | case JXFORM_ROT_90: |
| 1548 | case JXFORM_ROT_270: |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1549 | info->output_width = srcinfo->output_height; |
| 1550 | info->output_height = srcinfo->output_width; |
| 1551 | if (info->num_components == 1) { |
| 1552 | info->iMCU_sample_width = srcinfo->_min_DCT_v_scaled_size; |
| 1553 | info->iMCU_sample_height = srcinfo->_min_DCT_h_scaled_size; |
| 1554 | } else { |
| 1555 | info->iMCU_sample_width = |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1556 | srcinfo->max_v_samp_factor * srcinfo->_min_DCT_v_scaled_size; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1557 | info->iMCU_sample_height = |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1558 | srcinfo->max_h_samp_factor * srcinfo->_min_DCT_h_scaled_size; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1559 | } |
| 1560 | break; |
| 1561 | default: |
| 1562 | info->output_width = srcinfo->output_width; |
| 1563 | info->output_height = srcinfo->output_height; |
| 1564 | if (info->num_components == 1) { |
| 1565 | info->iMCU_sample_width = srcinfo->_min_DCT_h_scaled_size; |
| 1566 | info->iMCU_sample_height = srcinfo->_min_DCT_v_scaled_size; |
| 1567 | } else { |
| 1568 | info->iMCU_sample_width = |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1569 | srcinfo->max_h_samp_factor * srcinfo->_min_DCT_h_scaled_size; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1570 | info->iMCU_sample_height = |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1571 | srcinfo->max_v_samp_factor * srcinfo->_min_DCT_v_scaled_size; |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1572 | } |
| 1573 | break; |
| 1574 | } |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1575 | |
| 1576 | /* If cropping has been requested, compute the crop area's position and |
| 1577 | * dimensions, ensuring that its upper left corner falls at an iMCU boundary. |
| 1578 | */ |
| 1579 | if (info->crop) { |
| 1580 | /* Insert default values for unset crop parameters */ |
| 1581 | if (info->crop_xoffset_set == JCROP_UNSET) |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1582 | info->crop_xoffset = 0; /* default to +0 */ |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1583 | if (info->crop_yoffset_set == JCROP_UNSET) |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1584 | info->crop_yoffset = 0; /* default to +0 */ |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1585 | if (info->crop_width_set == JCROP_UNSET) { |
| 1586 | if (info->crop_xoffset >= info->output_width) |
| 1587 | ERREXIT(srcinfo, JERR_BAD_CROP_SPEC); |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1588 | info->crop_width = info->output_width - info->crop_xoffset; |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1589 | } else { |
| 1590 | /* Check for crop extension */ |
| 1591 | if (info->crop_width > info->output_width) { |
| 1592 | /* Crop extension does not work when transforming! */ |
| 1593 | if (info->transform != JXFORM_NONE || |
| 1594 | info->crop_xoffset >= info->crop_width || |
| 1595 | info->crop_xoffset > info->crop_width - info->output_width) |
| 1596 | ERREXIT(srcinfo, JERR_BAD_CROP_SPEC); |
| 1597 | } else { |
| 1598 | if (info->crop_xoffset >= info->output_width || |
| 1599 | info->crop_width <= 0 || |
| 1600 | info->crop_xoffset > info->output_width - info->crop_width) |
| 1601 | ERREXIT(srcinfo, JERR_BAD_CROP_SPEC); |
| 1602 | } |
| 1603 | } |
| 1604 | if (info->crop_height_set == JCROP_UNSET) { |
| 1605 | if (info->crop_yoffset >= info->output_height) |
| 1606 | ERREXIT(srcinfo, JERR_BAD_CROP_SPEC); |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1607 | info->crop_height = info->output_height - info->crop_yoffset; |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1608 | } else { |
| 1609 | /* Check for crop extension */ |
| 1610 | if (info->crop_height > info->output_height) { |
| 1611 | /* Crop extension does not work when transforming! */ |
| 1612 | if (info->transform != JXFORM_NONE || |
| 1613 | info->crop_yoffset >= info->crop_height || |
| 1614 | info->crop_yoffset > info->crop_height - info->output_height) |
| 1615 | ERREXIT(srcinfo, JERR_BAD_CROP_SPEC); |
| 1616 | } else { |
| 1617 | if (info->crop_yoffset >= info->output_height || |
| 1618 | info->crop_height <= 0 || |
| 1619 | info->crop_yoffset > info->output_height - info->crop_height) |
| 1620 | ERREXIT(srcinfo, JERR_BAD_CROP_SPEC); |
| 1621 | } |
| 1622 | } |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1623 | /* Convert negative crop offsets into regular offsets */ |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1624 | if (info->crop_xoffset_set != JCROP_NEG) |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1625 | xoffset = info->crop_xoffset; |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1626 | else if (info->crop_width > info->output_width) /* crop extension */ |
| 1627 | xoffset = info->crop_width - info->output_width - info->crop_xoffset; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1628 | else |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1629 | xoffset = info->output_width - info->crop_width - info->crop_xoffset; |
| 1630 | if (info->crop_yoffset_set != JCROP_NEG) |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1631 | yoffset = info->crop_yoffset; |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1632 | else if (info->crop_height > info->output_height) /* crop extension */ |
| 1633 | yoffset = info->crop_height - info->output_height - info->crop_yoffset; |
| 1634 | else |
| 1635 | yoffset = info->output_height - info->crop_height - info->crop_yoffset; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1636 | /* Now adjust so that upper left corner falls at an iMCU boundary */ |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1637 | switch (info->transform) { |
| 1638 | case JXFORM_DROP: |
| 1639 | /* Ensure the effective drop region will not exceed the requested */ |
| 1640 | itemp = info->iMCU_sample_width; |
| 1641 | dtemp = itemp - 1 - ((xoffset + itemp - 1) % itemp); |
| 1642 | xoffset += dtemp; |
| 1643 | if (info->crop_width <= dtemp) |
| 1644 | info->drop_width = 0; |
| 1645 | else if (xoffset + info->crop_width - dtemp == info->output_width) |
| 1646 | /* Matching right edge: include partial iMCU */ |
| 1647 | info->drop_width = (info->crop_width - dtemp + itemp - 1) / itemp; |
| 1648 | else |
| 1649 | info->drop_width = (info->crop_width - dtemp) / itemp; |
| 1650 | itemp = info->iMCU_sample_height; |
| 1651 | dtemp = itemp - 1 - ((yoffset + itemp - 1) % itemp); |
| 1652 | yoffset += dtemp; |
| 1653 | if (info->crop_height <= dtemp) |
| 1654 | info->drop_height = 0; |
| 1655 | else if (yoffset + info->crop_height - dtemp == info->output_height) |
| 1656 | /* Matching bottom edge: include partial iMCU */ |
| 1657 | info->drop_height = (info->crop_height - dtemp + itemp - 1) / itemp; |
| 1658 | else |
| 1659 | info->drop_height = (info->crop_height - dtemp) / itemp; |
| 1660 | /* Check if sampling factors match for dropping */ |
| 1661 | if (info->drop_width != 0 && info->drop_height != 0) |
| 1662 | for (ci = 0; ci < info->num_components && |
| 1663 | ci < info->drop_ptr->num_components; ci++) { |
| 1664 | if (info->drop_ptr->comp_info[ci].h_samp_factor * |
| 1665 | srcinfo->max_h_samp_factor != |
| 1666 | srcinfo->comp_info[ci].h_samp_factor * |
| 1667 | info->drop_ptr->max_h_samp_factor) |
| 1668 | ERREXIT6(srcinfo, JERR_BAD_DROP_SAMPLING, ci, |
| 1669 | info->drop_ptr->comp_info[ci].h_samp_factor, |
| 1670 | info->drop_ptr->max_h_samp_factor, |
| 1671 | srcinfo->comp_info[ci].h_samp_factor, |
| 1672 | srcinfo->max_h_samp_factor, 'h'); |
| 1673 | if (info->drop_ptr->comp_info[ci].v_samp_factor * |
| 1674 | srcinfo->max_v_samp_factor != |
| 1675 | srcinfo->comp_info[ci].v_samp_factor * |
| 1676 | info->drop_ptr->max_v_samp_factor) |
| 1677 | ERREXIT6(srcinfo, JERR_BAD_DROP_SAMPLING, ci, |
| 1678 | info->drop_ptr->comp_info[ci].v_samp_factor, |
| 1679 | info->drop_ptr->max_v_samp_factor, |
| 1680 | srcinfo->comp_info[ci].v_samp_factor, |
| 1681 | srcinfo->max_v_samp_factor, 'v'); |
| 1682 | } |
| 1683 | break; |
| 1684 | case JXFORM_WIPE: |
| 1685 | /* Ensure the effective wipe region will cover the requested */ |
| 1686 | info->drop_width = (JDIMENSION)jdiv_round_up |
| 1687 | ((long)(info->crop_width + (xoffset % info->iMCU_sample_width)), |
| 1688 | (long)info->iMCU_sample_width); |
| 1689 | info->drop_height = (JDIMENSION)jdiv_round_up |
| 1690 | ((long)(info->crop_height + (yoffset % info->iMCU_sample_height)), |
| 1691 | (long)info->iMCU_sample_height); |
| 1692 | break; |
| 1693 | default: |
| 1694 | /* Ensure the effective crop region will cover the requested */ |
| 1695 | if (info->crop_width_set == JCROP_FORCE || |
| 1696 | info->crop_width > info->output_width) |
| 1697 | info->output_width = info->crop_width; |
| 1698 | else |
| 1699 | info->output_width = |
| 1700 | info->crop_width + (xoffset % info->iMCU_sample_width); |
| 1701 | if (info->crop_height_set == JCROP_FORCE || |
| 1702 | info->crop_height > info->output_height) |
| 1703 | info->output_height = info->crop_height; |
| 1704 | else |
| 1705 | info->output_height = |
| 1706 | info->crop_height + (yoffset % info->iMCU_sample_height); |
| 1707 | } |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1708 | /* Save x/y offsets measured in iMCUs */ |
| 1709 | info->x_crop_offset = xoffset / info->iMCU_sample_width; |
| 1710 | info->y_crop_offset = yoffset / info->iMCU_sample_height; |
| 1711 | } else { |
| 1712 | info->x_crop_offset = 0; |
| 1713 | info->y_crop_offset = 0; |
| 1714 | } |
| 1715 | |
| 1716 | /* Figure out whether we need workspace arrays, |
| 1717 | * and if so whether they are transposed relative to the source. |
| 1718 | */ |
| 1719 | need_workspace = FALSE; |
| 1720 | transpose_it = FALSE; |
| 1721 | switch (info->transform) { |
| 1722 | case JXFORM_NONE: |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1723 | if (info->x_crop_offset != 0 || info->y_crop_offset != 0 || |
| 1724 | info->output_width > srcinfo->output_width || |
| 1725 | info->output_height > srcinfo->output_height) |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1726 | need_workspace = TRUE; |
| 1727 | /* No workspace needed if neither cropping nor transforming */ |
| 1728 | break; |
| 1729 | case JXFORM_FLIP_H: |
| 1730 | if (info->trim) |
| 1731 | trim_right_edge(info, srcinfo->output_width); |
| 1732 | if (info->y_crop_offset != 0 || info->slow_hflip) |
| 1733 | need_workspace = TRUE; |
| 1734 | /* do_flip_h_no_crop doesn't need a workspace array */ |
| 1735 | break; |
| 1736 | case JXFORM_FLIP_V: |
| 1737 | if (info->trim) |
| 1738 | trim_bottom_edge(info, srcinfo->output_height); |
| 1739 | /* Need workspace arrays having same dimensions as source image. */ |
| 1740 | need_workspace = TRUE; |
| 1741 | break; |
| 1742 | case JXFORM_TRANSPOSE: |
| 1743 | /* transpose does NOT have to trim anything */ |
| 1744 | /* Need workspace arrays having transposed dimensions. */ |
| 1745 | need_workspace = TRUE; |
| 1746 | transpose_it = TRUE; |
| 1747 | break; |
| 1748 | case JXFORM_TRANSVERSE: |
| 1749 | if (info->trim) { |
| 1750 | trim_right_edge(info, srcinfo->output_height); |
| 1751 | trim_bottom_edge(info, srcinfo->output_width); |
| 1752 | } |
| 1753 | /* Need workspace arrays having transposed dimensions. */ |
| 1754 | need_workspace = TRUE; |
| 1755 | transpose_it = TRUE; |
| 1756 | break; |
| 1757 | case JXFORM_ROT_90: |
| 1758 | if (info->trim) |
| 1759 | trim_right_edge(info, srcinfo->output_height); |
| 1760 | /* Need workspace arrays having transposed dimensions. */ |
| 1761 | need_workspace = TRUE; |
| 1762 | transpose_it = TRUE; |
| 1763 | break; |
| 1764 | case JXFORM_ROT_180: |
| 1765 | if (info->trim) { |
| 1766 | trim_right_edge(info, srcinfo->output_width); |
| 1767 | trim_bottom_edge(info, srcinfo->output_height); |
| 1768 | } |
| 1769 | /* Need workspace arrays having same dimensions as source image. */ |
| 1770 | need_workspace = TRUE; |
| 1771 | break; |
| 1772 | case JXFORM_ROT_270: |
| 1773 | if (info->trim) |
| 1774 | trim_bottom_edge(info, srcinfo->output_width); |
| 1775 | /* Need workspace arrays having transposed dimensions. */ |
| 1776 | need_workspace = TRUE; |
| 1777 | transpose_it = TRUE; |
| 1778 | break; |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1779 | case JXFORM_WIPE: |
| 1780 | break; |
| 1781 | case JXFORM_DROP: |
| 1782 | break; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1783 | } |
| 1784 | |
| 1785 | /* Allocate workspace if needed. |
| 1786 | * Note that we allocate arrays padded out to the next iMCU boundary, |
| 1787 | * so that transform routines need not worry about missing edge blocks. |
| 1788 | */ |
| 1789 | if (need_workspace) { |
| 1790 | coef_arrays = (jvirt_barray_ptr *) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1791 | (*srcinfo->mem->alloc_small) ((j_common_ptr)srcinfo, JPOOL_IMAGE, |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1792 | sizeof(jvirt_barray_ptr) * info->num_components); |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1793 | width_in_iMCUs = (JDIMENSION) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1794 | jdiv_round_up((long)info->output_width, (long)info->iMCU_sample_width); |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1795 | height_in_iMCUs = (JDIMENSION) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1796 | jdiv_round_up((long)info->output_height, (long)info->iMCU_sample_height); |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1797 | for (ci = 0; ci < info->num_components; ci++) { |
| 1798 | compptr = srcinfo->comp_info + ci; |
| 1799 | if (info->num_components == 1) { |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1800 | /* we're going to force samp factors to 1x1 in this case */ |
| 1801 | h_samp_factor = v_samp_factor = 1; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1802 | } else if (transpose_it) { |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1803 | h_samp_factor = compptr->v_samp_factor; |
| 1804 | v_samp_factor = compptr->h_samp_factor; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1805 | } else { |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1806 | h_samp_factor = compptr->h_samp_factor; |
| 1807 | v_samp_factor = compptr->v_samp_factor; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1808 | } |
| 1809 | width_in_blocks = width_in_iMCUs * h_samp_factor; |
| 1810 | height_in_blocks = height_in_iMCUs * v_samp_factor; |
| 1811 | coef_arrays[ci] = (*srcinfo->mem->request_virt_barray) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1812 | ((j_common_ptr)srcinfo, JPOOL_IMAGE, FALSE, |
| 1813 | width_in_blocks, height_in_blocks, (JDIMENSION)v_samp_factor); |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1814 | } |
| 1815 | info->workspace_coef_arrays = coef_arrays; |
| 1816 | } else |
| 1817 | info->workspace_coef_arrays = NULL; |
| 1818 | |
| 1819 | return TRUE; |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1820 | } |
| 1821 | |
| 1822 | |
| 1823 | /* Transpose destination image parameters */ |
| 1824 | |
| 1825 | LOCAL(void) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1826 | transpose_critical_parameters(j_compress_ptr dstinfo) |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1827 | { |
| 1828 | int tblno, i, j, ci, itemp; |
| 1829 | jpeg_component_info *compptr; |
| 1830 | JQUANT_TBL *qtblptr; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1831 | JDIMENSION jtemp; |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1832 | UINT16 qtemp; |
| 1833 | |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1834 | /* Transpose image dimensions */ |
| 1835 | jtemp = dstinfo->image_width; |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1836 | dstinfo->image_width = dstinfo->image_height; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1837 | dstinfo->image_height = jtemp; |
| 1838 | #if JPEG_LIB_VERSION >= 70 |
| 1839 | itemp = dstinfo->min_DCT_h_scaled_size; |
| 1840 | dstinfo->min_DCT_h_scaled_size = dstinfo->min_DCT_v_scaled_size; |
| 1841 | dstinfo->min_DCT_v_scaled_size = itemp; |
| 1842 | #endif |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1843 | |
| 1844 | /* Transpose sampling factors */ |
| 1845 | for (ci = 0; ci < dstinfo->num_components; ci++) { |
| 1846 | compptr = dstinfo->comp_info + ci; |
| 1847 | itemp = compptr->h_samp_factor; |
| 1848 | compptr->h_samp_factor = compptr->v_samp_factor; |
| 1849 | compptr->v_samp_factor = itemp; |
| 1850 | } |
| 1851 | |
| 1852 | /* Transpose quantization tables */ |
| 1853 | for (tblno = 0; tblno < NUM_QUANT_TBLS; tblno++) { |
| 1854 | qtblptr = dstinfo->quant_tbl_ptrs[tblno]; |
| 1855 | if (qtblptr != NULL) { |
| 1856 | for (i = 0; i < DCTSIZE; i++) { |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1857 | for (j = 0; j < i; j++) { |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1858 | qtemp = qtblptr->quantval[i * DCTSIZE + j]; |
| 1859 | qtblptr->quantval[i * DCTSIZE + j] = |
| 1860 | qtblptr->quantval[j * DCTSIZE + i]; |
| 1861 | qtblptr->quantval[j * DCTSIZE + i] = qtemp; |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1862 | } |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1863 | } |
| 1864 | } |
| 1865 | } |
| 1866 | } |
| 1867 | |
| 1868 | |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1869 | /* Adjust Exif image parameters. |
| 1870 | * |
| 1871 | * We try to adjust the Tags ExifImageWidth and ExifImageHeight if possible. |
| 1872 | */ |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1873 | |
| 1874 | LOCAL(void) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1875 | adjust_exif_parameters(JOCTET *data, unsigned int length, JDIMENSION new_width, |
| 1876 | JDIMENSION new_height) |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1877 | { |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1878 | boolean is_motorola; /* Flag for byte order */ |
| 1879 | unsigned int number_of_tags, tagnum; |
| 1880 | unsigned int firstoffset, offset; |
| 1881 | JDIMENSION new_value; |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1882 | |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1883 | if (length < 12) return; /* Length of an IFD entry */ |
| 1884 | |
| 1885 | /* Discover byte order */ |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1886 | if (data[0] == 0x49 && data[1] == 0x49) |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1887 | is_motorola = FALSE; |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1888 | else if (data[0] == 0x4D && data[1] == 0x4D) |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1889 | is_motorola = TRUE; |
| 1890 | else |
| 1891 | return; |
| 1892 | |
| 1893 | /* Check Tag Mark */ |
| 1894 | if (is_motorola) { |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1895 | if (data[2] != 0) return; |
| 1896 | if (data[3] != 0x2A) return; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1897 | } else { |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1898 | if (data[3] != 0) return; |
| 1899 | if (data[2] != 0x2A) return; |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1900 | } |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1901 | |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1902 | /* Get first IFD offset (offset to IFD0) */ |
| 1903 | if (is_motorola) { |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1904 | if (data[4] != 0) return; |
| 1905 | if (data[5] != 0) return; |
| 1906 | firstoffset = data[6]; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1907 | firstoffset <<= 8; |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1908 | firstoffset += data[7]; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1909 | } else { |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1910 | if (data[7] != 0) return; |
| 1911 | if (data[6] != 0) return; |
| 1912 | firstoffset = data[5]; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1913 | firstoffset <<= 8; |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1914 | firstoffset += data[4]; |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 1915 | } |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1916 | if (firstoffset > length - 2) return; /* check end of data segment */ |
| 1917 | |
| 1918 | /* Get the number of directory entries contained in this IFD */ |
| 1919 | if (is_motorola) { |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1920 | number_of_tags = data[firstoffset]; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1921 | number_of_tags <<= 8; |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1922 | number_of_tags += data[firstoffset + 1]; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1923 | } else { |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1924 | number_of_tags = data[firstoffset + 1]; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1925 | number_of_tags <<= 8; |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1926 | number_of_tags += data[firstoffset]; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1927 | } |
| 1928 | if (number_of_tags == 0) return; |
| 1929 | firstoffset += 2; |
| 1930 | |
| 1931 | /* Search for ExifSubIFD offset Tag in IFD0 */ |
| 1932 | for (;;) { |
| 1933 | if (firstoffset > length - 12) return; /* check end of data segment */ |
| 1934 | /* Get Tag number */ |
| 1935 | if (is_motorola) { |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1936 | tagnum = data[firstoffset]; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1937 | tagnum <<= 8; |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1938 | tagnum += data[firstoffset + 1]; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1939 | } else { |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1940 | tagnum = data[firstoffset + 1]; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1941 | tagnum <<= 8; |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1942 | tagnum += data[firstoffset]; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1943 | } |
| 1944 | if (tagnum == 0x8769) break; /* found ExifSubIFD offset Tag */ |
| 1945 | if (--number_of_tags == 0) return; |
| 1946 | firstoffset += 12; |
| 1947 | } |
| 1948 | |
| 1949 | /* Get the ExifSubIFD offset */ |
| 1950 | if (is_motorola) { |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1951 | if (data[firstoffset + 8] != 0) return; |
| 1952 | if (data[firstoffset + 9] != 0) return; |
| 1953 | offset = data[firstoffset + 10]; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1954 | offset <<= 8; |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1955 | offset += data[firstoffset + 11]; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1956 | } else { |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1957 | if (data[firstoffset + 11] != 0) return; |
| 1958 | if (data[firstoffset + 10] != 0) return; |
| 1959 | offset = data[firstoffset + 9]; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1960 | offset <<= 8; |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1961 | offset += data[firstoffset + 8]; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1962 | } |
| 1963 | if (offset > length - 2) return; /* check end of data segment */ |
| 1964 | |
| 1965 | /* Get the number of directory entries contained in this SubIFD */ |
| 1966 | if (is_motorola) { |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1967 | number_of_tags = data[offset]; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1968 | number_of_tags <<= 8; |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1969 | number_of_tags += data[offset + 1]; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1970 | } else { |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1971 | number_of_tags = data[offset + 1]; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1972 | number_of_tags <<= 8; |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1973 | number_of_tags += data[offset]; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1974 | } |
| 1975 | if (number_of_tags < 2) return; |
| 1976 | offset += 2; |
| 1977 | |
| 1978 | /* Search for ExifImageWidth and ExifImageHeight Tags in this SubIFD */ |
| 1979 | do { |
| 1980 | if (offset > length - 12) return; /* check end of data segment */ |
| 1981 | /* Get Tag number */ |
| 1982 | if (is_motorola) { |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1983 | tagnum = data[offset]; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1984 | tagnum <<= 8; |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1985 | tagnum += data[offset + 1]; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1986 | } else { |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1987 | tagnum = data[offset + 1]; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1988 | tagnum <<= 8; |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 1989 | tagnum += data[offset]; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1990 | } |
| 1991 | if (tagnum == 0xA002 || tagnum == 0xA003) { |
| 1992 | if (tagnum == 0xA002) |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1993 | new_value = new_width; /* ExifImageWidth Tag */ |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1994 | else |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 1995 | new_value = new_height; /* ExifImageHeight Tag */ |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 1996 | if (is_motorola) { |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 1997 | data[offset + 2] = 0; /* Format = unsigned long (4 octets) */ |
| 1998 | data[offset + 3] = 4; |
| 1999 | data[offset + 4] = 0; /* Number Of Components = 1 */ |
| 2000 | data[offset + 5] = 0; |
| 2001 | data[offset + 6] = 0; |
| 2002 | data[offset + 7] = 1; |
| 2003 | data[offset + 8] = 0; |
| 2004 | data[offset + 9] = 0; |
| 2005 | data[offset + 10] = (JOCTET)((new_value >> 8) & 0xFF); |
| 2006 | data[offset + 11] = (JOCTET)(new_value & 0xFF); |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 2007 | } else { |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 2008 | data[offset + 2] = 4; /* Format = unsigned long (4 octets) */ |
| 2009 | data[offset + 3] = 0; |
| 2010 | data[offset + 4] = 1; /* Number Of Components = 1 */ |
| 2011 | data[offset + 5] = 0; |
| 2012 | data[offset + 6] = 0; |
| 2013 | data[offset + 7] = 0; |
| 2014 | data[offset + 8] = (JOCTET)(new_value & 0xFF); |
| 2015 | data[offset + 9] = (JOCTET)((new_value >> 8) & 0xFF); |
| 2016 | data[offset + 10] = 0; |
| 2017 | data[offset + 11] = 0; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 2018 | } |
| 2019 | } |
| 2020 | offset += 12; |
| 2021 | } while (--number_of_tags); |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 2022 | } |
| 2023 | |
| 2024 | |
| 2025 | /* Adjust output image parameters as needed. |
| 2026 | * |
| 2027 | * This must be called after jpeg_copy_critical_parameters() |
| 2028 | * and before jpeg_write_coefficients(). |
| 2029 | * |
| 2030 | * The return value is the set of virtual coefficient arrays to be written |
| 2031 | * (either the ones allocated by jtransform_request_workspace, or the |
| 2032 | * original source data arrays). The caller will need to pass this value |
| 2033 | * to jpeg_write_coefficients(). |
| 2034 | */ |
| 2035 | |
| 2036 | GLOBAL(jvirt_barray_ptr *) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 2037 | jtransform_adjust_parameters(j_decompress_ptr srcinfo, j_compress_ptr dstinfo, |
| 2038 | jvirt_barray_ptr *src_coef_arrays, |
| 2039 | jpeg_transform_info *info) |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 2040 | { |
| 2041 | /* If force-to-grayscale is requested, adjust destination parameters */ |
| 2042 | if (info->force_grayscale) { |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 2043 | /* First, ensure we have YCbCr or grayscale data, and that the source's |
| 2044 | * Y channel is full resolution. (No reasonable person would make Y |
| 2045 | * be less than full resolution, so actually coping with that case |
| 2046 | * isn't worth extra code space. But we check it to avoid crashing.) |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 2047 | */ |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 2048 | if (((dstinfo->jpeg_color_space == JCS_YCbCr && |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 2049 | dstinfo->num_components == 3) || |
| 2050 | (dstinfo->jpeg_color_space == JCS_GRAYSCALE && |
| 2051 | dstinfo->num_components == 1)) && |
| 2052 | srcinfo->comp_info[0].h_samp_factor == srcinfo->max_h_samp_factor && |
| 2053 | srcinfo->comp_info[0].v_samp_factor == srcinfo->max_v_samp_factor) { |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 2054 | /* We use jpeg_set_colorspace to make sure subsidiary settings get fixed |
| 2055 | * properly. Among other things, it sets the target h_samp_factor & |
| 2056 | * v_samp_factor to 1, which typically won't match the source. |
| 2057 | * We have to preserve the source's quantization table number, however. |
| 2058 | */ |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 2059 | int sv_quant_tbl_no = dstinfo->comp_info[0].quant_tbl_no; |
| 2060 | jpeg_set_colorspace(dstinfo, JCS_GRAYSCALE); |
| 2061 | dstinfo->comp_info[0].quant_tbl_no = sv_quant_tbl_no; |
| 2062 | } else { |
| 2063 | /* Sorry, can't do it */ |
| 2064 | ERREXIT(dstinfo, JERR_CONVERSION_NOTIMPL); |
| 2065 | } |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 2066 | } else if (info->num_components == 1) { |
| 2067 | /* For a single-component source, we force the destination sampling factors |
| 2068 | * to 1x1, with or without force_grayscale. This is useful because some |
| 2069 | * decoders choke on grayscale images with other sampling factors. |
| 2070 | */ |
| 2071 | dstinfo->comp_info[0].h_samp_factor = 1; |
| 2072 | dstinfo->comp_info[0].v_samp_factor = 1; |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 2073 | } |
| 2074 | |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 2075 | /* Correct the destination's image dimensions as necessary |
| 2076 | * for rotate/flip, resize, and crop operations. |
| 2077 | */ |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 2078 | #if JPEG_LIB_VERSION >= 80 |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 2079 | dstinfo->jpeg_width = info->output_width; |
| 2080 | dstinfo->jpeg_height = info->output_height; |
| 2081 | #endif |
| 2082 | |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 2083 | /* Transpose destination image parameters, adjust quantization */ |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 2084 | switch (info->transform) { |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 2085 | case JXFORM_TRANSPOSE: |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 2086 | case JXFORM_TRANSVERSE: |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 2087 | case JXFORM_ROT_90: |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 2088 | case JXFORM_ROT_270: |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 2089 | #if JPEG_LIB_VERSION < 80 |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 2090 | dstinfo->image_width = info->output_height; |
| 2091 | dstinfo->image_height = info->output_width; |
| 2092 | #endif |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 2093 | transpose_critical_parameters(dstinfo); |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 2094 | break; |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 2095 | case JXFORM_DROP: |
| 2096 | if (info->drop_width != 0 && info->drop_height != 0) |
| 2097 | adjust_quant(srcinfo, src_coef_arrays, |
| 2098 | info->drop_ptr, info->drop_coef_arrays, |
| 2099 | info->trim, dstinfo); |
| 2100 | break; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 2101 | default: |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 2102 | #if JPEG_LIB_VERSION < 80 |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 2103 | dstinfo->image_width = info->output_width; |
| 2104 | dstinfo->image_height = info->output_height; |
| 2105 | #endif |
| 2106 | break; |
| 2107 | } |
| 2108 | |
| 2109 | /* Adjust Exif properties */ |
| 2110 | if (srcinfo->marker_list != NULL && |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 2111 | srcinfo->marker_list->marker == JPEG_APP0 + 1 && |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 2112 | srcinfo->marker_list->data_length >= 6 && |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 2113 | srcinfo->marker_list->data[0] == 0x45 && |
| 2114 | srcinfo->marker_list->data[1] == 0x78 && |
| 2115 | srcinfo->marker_list->data[2] == 0x69 && |
| 2116 | srcinfo->marker_list->data[3] == 0x66 && |
| 2117 | srcinfo->marker_list->data[4] == 0 && |
| 2118 | srcinfo->marker_list->data[5] == 0) { |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 2119 | /* Suppress output of JFIF marker */ |
| 2120 | dstinfo->write_JFIF_header = FALSE; |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 2121 | /* Adjust Exif image parameters */ |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 2122 | #if JPEG_LIB_VERSION >= 80 |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 2123 | if (dstinfo->jpeg_width != srcinfo->image_width || |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 2124 | dstinfo->jpeg_height != srcinfo->image_height) |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 2125 | /* Align data segment to start of TIFF structure for parsing */ |
| 2126 | adjust_exif_parameters(srcinfo->marker_list->data + 6, |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 2127 | srcinfo->marker_list->data_length - 6, |
| 2128 | dstinfo->jpeg_width, dstinfo->jpeg_height); |
| 2129 | #else |
| 2130 | if (dstinfo->image_width != srcinfo->image_width || |
| 2131 | dstinfo->image_height != srcinfo->image_height) |
| 2132 | /* Align data segment to start of TIFF structure for parsing */ |
| 2133 | adjust_exif_parameters(srcinfo->marker_list->data + 6, |
| 2134 | srcinfo->marker_list->data_length - 6, |
| 2135 | dstinfo->image_width, dstinfo->image_height); |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 2136 | #endif |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 2137 | } |
| 2138 | |
| 2139 | /* Return the appropriate output data set */ |
| 2140 | if (info->workspace_coef_arrays != NULL) |
| 2141 | return info->workspace_coef_arrays; |
| 2142 | return src_coef_arrays; |
| 2143 | } |
| 2144 | |
| 2145 | |
| 2146 | /* Execute the actual transformation, if any. |
| 2147 | * |
| 2148 | * This must be called *after* jpeg_write_coefficients, because it depends |
| 2149 | * on jpeg_write_coefficients to have computed subsidiary values such as |
| 2150 | * the per-component width and height fields in the destination object. |
| 2151 | * |
| 2152 | * Note that some transformations will modify the source data arrays! |
| 2153 | */ |
| 2154 | |
| 2155 | GLOBAL(void) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 2156 | jtransform_execute_transform(j_decompress_ptr srcinfo, j_compress_ptr dstinfo, |
| 2157 | jvirt_barray_ptr *src_coef_arrays, |
| 2158 | jpeg_transform_info *info) |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 2159 | { |
| 2160 | jvirt_barray_ptr *dst_coef_arrays = info->workspace_coef_arrays; |
| 2161 | |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 2162 | /* Note: conditions tested here should match those in switch statement |
| 2163 | * in jtransform_request_workspace() |
| 2164 | */ |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 2165 | switch (info->transform) { |
| 2166 | case JXFORM_NONE: |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 2167 | if (info->output_width > srcinfo->output_width || |
| 2168 | info->output_height > srcinfo->output_height) { |
| 2169 | if (info->output_width > srcinfo->output_width && |
| 2170 | info->crop_width_set == JCROP_REFLECT) |
| 2171 | do_crop_ext_reflect(srcinfo, dstinfo, |
| 2172 | info->x_crop_offset, info->y_crop_offset, |
| 2173 | src_coef_arrays, dst_coef_arrays); |
| 2174 | else if (info->output_width > srcinfo->output_width && |
| 2175 | info->crop_width_set == JCROP_FORCE) |
| 2176 | do_crop_ext_flat(srcinfo, dstinfo, |
| 2177 | info->x_crop_offset, info->y_crop_offset, |
| 2178 | src_coef_arrays, dst_coef_arrays); |
| 2179 | else |
| 2180 | do_crop_ext_zero(srcinfo, dstinfo, |
| 2181 | info->x_crop_offset, info->y_crop_offset, |
| 2182 | src_coef_arrays, dst_coef_arrays); |
| 2183 | } else if (info->x_crop_offset != 0 || info->y_crop_offset != 0) |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 2184 | do_crop(srcinfo, dstinfo, info->x_crop_offset, info->y_crop_offset, |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 2185 | src_coef_arrays, dst_coef_arrays); |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 2186 | break; |
| 2187 | case JXFORM_FLIP_H: |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 2188 | if (info->y_crop_offset != 0 || info->slow_hflip) |
| 2189 | do_flip_h(srcinfo, dstinfo, info->x_crop_offset, info->y_crop_offset, |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 2190 | src_coef_arrays, dst_coef_arrays); |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 2191 | else |
| 2192 | do_flip_h_no_crop(srcinfo, dstinfo, info->x_crop_offset, |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 2193 | src_coef_arrays); |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 2194 | break; |
| 2195 | case JXFORM_FLIP_V: |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 2196 | do_flip_v(srcinfo, dstinfo, info->x_crop_offset, info->y_crop_offset, |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 2197 | src_coef_arrays, dst_coef_arrays); |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 2198 | break; |
| 2199 | case JXFORM_TRANSPOSE: |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 2200 | do_transpose(srcinfo, dstinfo, info->x_crop_offset, info->y_crop_offset, |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 2201 | src_coef_arrays, dst_coef_arrays); |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 2202 | break; |
| 2203 | case JXFORM_TRANSVERSE: |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 2204 | do_transverse(srcinfo, dstinfo, info->x_crop_offset, info->y_crop_offset, |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 2205 | src_coef_arrays, dst_coef_arrays); |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 2206 | break; |
| 2207 | case JXFORM_ROT_90: |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 2208 | do_rot_90(srcinfo, dstinfo, info->x_crop_offset, info->y_crop_offset, |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 2209 | src_coef_arrays, dst_coef_arrays); |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 2210 | break; |
| 2211 | case JXFORM_ROT_180: |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 2212 | do_rot_180(srcinfo, dstinfo, info->x_crop_offset, info->y_crop_offset, |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 2213 | src_coef_arrays, dst_coef_arrays); |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 2214 | break; |
| 2215 | case JXFORM_ROT_270: |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 2216 | do_rot_270(srcinfo, dstinfo, info->x_crop_offset, info->y_crop_offset, |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 2217 | src_coef_arrays, dst_coef_arrays); |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 2218 | break; |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 2219 | case JXFORM_WIPE: |
| 2220 | if (info->crop_width_set == JCROP_REFLECT && |
| 2221 | info->y_crop_offset == 0 && info->drop_height == |
| 2222 | (JDIMENSION)jdiv_round_up |
| 2223 | ((long)info->output_height, (long)info->iMCU_sample_height) && |
| 2224 | (info->x_crop_offset == 0 || |
| 2225 | info->x_crop_offset + info->drop_width == |
| 2226 | (JDIMENSION)jdiv_round_up |
| 2227 | ((long)info->output_width, (long)info->iMCU_sample_width))) |
| 2228 | do_reflect(srcinfo, dstinfo, info->x_crop_offset, |
| 2229 | src_coef_arrays, info->drop_width, info->drop_height); |
| 2230 | else if (info->crop_width_set == JCROP_FORCE) |
| 2231 | do_flatten(srcinfo, dstinfo, info->x_crop_offset, info->y_crop_offset, |
| 2232 | src_coef_arrays, info->drop_width, info->drop_height); |
| 2233 | else |
| 2234 | do_wipe(srcinfo, dstinfo, info->x_crop_offset, info->y_crop_offset, |
| 2235 | src_coef_arrays, info->drop_width, info->drop_height); |
| 2236 | break; |
| 2237 | case JXFORM_DROP: |
| 2238 | if (info->drop_width != 0 && info->drop_height != 0) |
| 2239 | do_drop(srcinfo, dstinfo, info->x_crop_offset, info->y_crop_offset, |
| 2240 | src_coef_arrays, info->drop_ptr, info->drop_coef_arrays, |
| 2241 | info->drop_width, info->drop_height); |
| 2242 | break; |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 2243 | } |
| 2244 | } |
| 2245 | |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 2246 | /* jtransform_perfect_transform |
| 2247 | * |
| 2248 | * Determine whether lossless transformation is perfectly |
| 2249 | * possible for a specified image and transformation. |
| 2250 | * |
| 2251 | * Inputs: |
| 2252 | * image_width, image_height: source image dimensions. |
| 2253 | * MCU_width, MCU_height: pixel dimensions of MCU. |
| 2254 | * transform: transformation identifier. |
| 2255 | * Parameter sources from initialized jpeg_struct |
| 2256 | * (after reading source header): |
| 2257 | * image_width = cinfo.image_width |
| 2258 | * image_height = cinfo.image_height |
| 2259 | * MCU_width = cinfo.max_h_samp_factor * cinfo.block_size |
| 2260 | * MCU_height = cinfo.max_v_samp_factor * cinfo.block_size |
| 2261 | * Result: |
| 2262 | * TRUE = perfect transformation possible |
| 2263 | * FALSE = perfect transformation not possible |
| 2264 | * (may use custom action then) |
| 2265 | */ |
| 2266 | |
| 2267 | GLOBAL(boolean) |
| 2268 | jtransform_perfect_transform(JDIMENSION image_width, JDIMENSION image_height, |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 2269 | int MCU_width, int MCU_height, |
| 2270 | JXFORM_CODE transform) |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 2271 | { |
| 2272 | boolean result = TRUE; /* initialize TRUE */ |
| 2273 | |
| 2274 | switch (transform) { |
| 2275 | case JXFORM_FLIP_H: |
| 2276 | case JXFORM_ROT_270: |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 2277 | if (image_width % (JDIMENSION)MCU_width) |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 2278 | result = FALSE; |
| 2279 | break; |
| 2280 | case JXFORM_FLIP_V: |
| 2281 | case JXFORM_ROT_90: |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 2282 | if (image_height % (JDIMENSION)MCU_height) |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 2283 | result = FALSE; |
| 2284 | break; |
| 2285 | case JXFORM_TRANSVERSE: |
| 2286 | case JXFORM_ROT_180: |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 2287 | if (image_width % (JDIMENSION)MCU_width) |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 2288 | result = FALSE; |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 2289 | if (image_height % (JDIMENSION)MCU_height) |
hbono@chromium.org | 9862697 | 2011-08-03 03:13:08 +0000 | [diff] [blame] | 2290 | result = FALSE; |
| 2291 | break; |
| 2292 | default: |
| 2293 | break; |
| 2294 | } |
| 2295 | |
| 2296 | return result; |
| 2297 | } |
| 2298 | |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 2299 | #endif /* TRANSFORMS_SUPPORTED */ |
| 2300 | |
| 2301 | |
| 2302 | /* Setup decompression object to save desired markers in memory. |
| 2303 | * This must be called before jpeg_read_header() to have the desired effect. |
| 2304 | */ |
| 2305 | |
| 2306 | GLOBAL(void) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 2307 | jcopy_markers_setup(j_decompress_ptr srcinfo, JCOPY_OPTION option) |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 2308 | { |
| 2309 | #ifdef SAVE_MARKERS_SUPPORTED |
| 2310 | int m; |
| 2311 | |
| 2312 | /* Save comments except under NONE option */ |
| 2313 | if (option != JCOPYOPT_NONE) { |
| 2314 | jpeg_save_markers(srcinfo, JPEG_COM, 0xFFFF); |
| 2315 | } |
| 2316 | /* Save all types of APPn markers iff ALL option */ |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 2317 | if (option == JCOPYOPT_ALL || option == JCOPYOPT_ALL_EXCEPT_ICC) { |
| 2318 | for (m = 0; m < 16; m++) { |
| 2319 | if (option == JCOPYOPT_ALL_EXCEPT_ICC && m == 2) |
| 2320 | continue; |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 2321 | jpeg_save_markers(srcinfo, JPEG_APP0 + m, 0xFFFF); |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 2322 | } |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 2323 | } |
| 2324 | #endif /* SAVE_MARKERS_SUPPORTED */ |
| 2325 | } |
| 2326 | |
| 2327 | /* Copy markers saved in the given source object to the destination object. |
| 2328 | * This should be called just after jpeg_start_compress() or |
| 2329 | * jpeg_write_coefficients(). |
| 2330 | * Note that those routines will have written the SOI, and also the |
| 2331 | * JFIF APP0 or Adobe APP14 markers if selected. |
| 2332 | */ |
| 2333 | |
| 2334 | GLOBAL(void) |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 2335 | jcopy_markers_execute(j_decompress_ptr srcinfo, j_compress_ptr dstinfo, |
| 2336 | JCOPY_OPTION option) |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 2337 | { |
| 2338 | jpeg_saved_marker_ptr marker; |
| 2339 | |
| 2340 | /* In the current implementation, we don't actually need to examine the |
| 2341 | * option flag here; we just copy everything that got saved. |
| 2342 | * But to avoid confusion, we do not output JFIF and Adobe APP14 markers |
| 2343 | * if the encoder library already wrote one. |
| 2344 | */ |
| 2345 | for (marker = srcinfo->marker_list; marker != NULL; marker = marker->next) { |
| 2346 | if (dstinfo->write_JFIF_header && |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 2347 | marker->marker == JPEG_APP0 && |
| 2348 | marker->data_length >= 5 && |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 2349 | marker->data[0] == 0x4A && |
| 2350 | marker->data[1] == 0x46 && |
| 2351 | marker->data[2] == 0x49 && |
| 2352 | marker->data[3] == 0x46 && |
| 2353 | marker->data[4] == 0) |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 2354 | continue; /* reject duplicate JFIF */ |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 2355 | if (dstinfo->write_Adobe_marker && |
Chris Blume | cca8c4d | 2019-03-01 01:09:50 -0800 | [diff] [blame] | 2356 | marker->marker == JPEG_APP0 + 14 && |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 2357 | marker->data_length >= 5 && |
Jonathan Wright | bbb8282 | 2020-11-25 13:36:43 +0000 | [diff] [blame] | 2358 | marker->data[0] == 0x41 && |
| 2359 | marker->data[1] == 0x64 && |
| 2360 | marker->data[2] == 0x6F && |
| 2361 | marker->data[3] == 0x62 && |
| 2362 | marker->data[4] == 0x65) |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 2363 | continue; /* reject duplicate Adobe */ |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 2364 | jpeg_write_marker(dstinfo, marker->marker, |
Tom Hudson | 0d47d2d | 2016-05-04 13:22:56 -0400 | [diff] [blame] | 2365 | marker->data, marker->data_length); |
hbono@chromium.org | f0c4f33 | 2010-11-01 05:14:55 +0000 | [diff] [blame] | 2366 | } |
| 2367 | } |