Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 1 | /* |
| 2 | * transupp.c |
| 3 | * |
DRC | cf763c0 | 2013-01-01 09:51:37 +0000 | [diff] [blame] | 4 | * This file was part of the Independent JPEG Group's software: |
Guido Vollbeding | 5829cb2 | 2012-01-15 00:00:00 +0000 | [diff] [blame] | 5 | * Copyright (C) 1997-2011, Thomas G. Lane, Guido Vollbeding. |
DRC | a6ef282 | 2013-09-28 03:23:49 +0000 | [diff] [blame] | 6 | * libjpeg-turbo Modifications: |
Leon Scroggins III | bd7903e | 2018-02-28 14:05:04 -0500 | [diff] [blame] | 7 | * Copyright (C) 2010, 2017, D. R. Commander. |
Alex Naidis | 6eb7d37 | 2016-10-16 23:10:08 +0200 | [diff] [blame] | 8 | * For conditions of distribution and use, see the accompanying README.ijg |
| 9 | * file. |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +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" |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 25 | #include "transupp.h" /* My own external interface */ |
DRC | c04bd3c | 2010-10-10 02:15:56 +0000 | [diff] [blame] | 26 | #include "jpegcomp.h" |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 27 | #include <ctype.h> /* to declare isdigit() */ |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 28 | |
| 29 | |
DRC | c04bd3c | 2010-10-10 02:15:56 +0000 | [diff] [blame] | 30 | #if JPEG_LIB_VERSION >= 70 |
| 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 |
| 33 | #else |
| 34 | #define dstinfo_min_DCT_h_scaled_size DCTSIZE |
| 35 | #define dstinfo_min_DCT_v_scaled_size DCTSIZE |
| 36 | #endif |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +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. |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +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. |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +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 | * |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +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 | * |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +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. |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +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 |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +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. |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 88 | */ |
| 89 | |
| 90 | |
| 91 | LOCAL(void) |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 92 | do_crop (j_decompress_ptr srcinfo, j_compress_ptr dstinfo, |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 93 | JDIMENSION x_crop_offset, JDIMENSION y_crop_offset, |
| 94 | jvirt_barray_ptr *src_coef_arrays, |
| 95 | jvirt_barray_ptr *dst_coef_arrays) |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 96 | /* Crop. This is only used when no rotate/flip is requested with the crop. */ |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 97 | { |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 98 | JDIMENSION dst_blk_y, x_crop_blocks, y_crop_blocks; |
| 99 | int ci, offset_y; |
| 100 | JBLOCKARRAY src_buffer, dst_buffer; |
| 101 | jpeg_component_info *compptr; |
| 102 | |
| 103 | /* We simply have to copy the right amount of data (the destination's |
| 104 | * image size) starting at the given X and Y offsets in the source. |
| 105 | */ |
| 106 | for (ci = 0; ci < dstinfo->num_components; ci++) { |
| 107 | compptr = dstinfo->comp_info + ci; |
| 108 | x_crop_blocks = x_crop_offset * compptr->h_samp_factor; |
| 109 | y_crop_blocks = y_crop_offset * compptr->v_samp_factor; |
| 110 | for (dst_blk_y = 0; dst_blk_y < compptr->height_in_blocks; |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 111 | dst_blk_y += compptr->v_samp_factor) { |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 112 | dst_buffer = (*srcinfo->mem->access_virt_barray) |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 113 | ((j_common_ptr) srcinfo, dst_coef_arrays[ci], dst_blk_y, |
| 114 | (JDIMENSION) compptr->v_samp_factor, TRUE); |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 115 | src_buffer = (*srcinfo->mem->access_virt_barray) |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 116 | ((j_common_ptr) srcinfo, src_coef_arrays[ci], |
| 117 | dst_blk_y + y_crop_blocks, |
| 118 | (JDIMENSION) compptr->v_samp_factor, FALSE); |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 119 | for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 120 | jcopy_block_row(src_buffer[offset_y] + x_crop_blocks, |
| 121 | dst_buffer[offset_y], |
| 122 | compptr->width_in_blocks); |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 123 | } |
| 124 | } |
| 125 | } |
| 126 | } |
| 127 | |
| 128 | |
| 129 | LOCAL(void) |
| 130 | do_flip_h_no_crop (j_decompress_ptr srcinfo, j_compress_ptr dstinfo, |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 131 | JDIMENSION x_crop_offset, |
| 132 | jvirt_barray_ptr *src_coef_arrays) |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 133 | /* Horizontal flip; done in-place, so no separate dest array is required. |
| 134 | * NB: this only works when y_crop_offset is zero. |
| 135 | */ |
| 136 | { |
| 137 | JDIMENSION MCU_cols, comp_width, blk_x, blk_y, x_crop_blocks; |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 138 | int ci, k, offset_y; |
| 139 | JBLOCKARRAY buffer; |
| 140 | JCOEFPTR ptr1, ptr2; |
| 141 | JCOEF temp1, temp2; |
| 142 | jpeg_component_info *compptr; |
| 143 | |
| 144 | /* Horizontal mirroring of DCT blocks is accomplished by swapping |
| 145 | * pairs of blocks in-place. Within a DCT block, we perform horizontal |
| 146 | * mirroring by changing the signs of odd-numbered columns. |
| 147 | * Partial iMCUs at the right edge are left untouched. |
| 148 | */ |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 149 | MCU_cols = srcinfo->output_width / |
DRC | c04bd3c | 2010-10-10 02:15:56 +0000 | [diff] [blame] | 150 | (dstinfo->max_h_samp_factor * dstinfo_min_DCT_h_scaled_size); |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 151 | |
| 152 | for (ci = 0; ci < dstinfo->num_components; ci++) { |
| 153 | compptr = dstinfo->comp_info + ci; |
| 154 | comp_width = MCU_cols * compptr->h_samp_factor; |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 155 | x_crop_blocks = x_crop_offset * compptr->h_samp_factor; |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 156 | for (blk_y = 0; blk_y < compptr->height_in_blocks; |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 157 | blk_y += compptr->v_samp_factor) { |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 158 | buffer = (*srcinfo->mem->access_virt_barray) |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 159 | ((j_common_ptr) srcinfo, src_coef_arrays[ci], blk_y, |
| 160 | (JDIMENSION) compptr->v_samp_factor, TRUE); |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 161 | for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 162 | /* Do the mirroring */ |
| 163 | for (blk_x = 0; blk_x * 2 < comp_width; blk_x++) { |
| 164 | ptr1 = buffer[offset_y][blk_x]; |
| 165 | ptr2 = buffer[offset_y][comp_width - blk_x - 1]; |
| 166 | /* this unrolled loop doesn't need to know which row it's on... */ |
| 167 | for (k = 0; k < DCTSIZE2; k += 2) { |
| 168 | temp1 = *ptr1; /* swap even column */ |
| 169 | temp2 = *ptr2; |
| 170 | *ptr1++ = temp2; |
| 171 | *ptr2++ = temp1; |
| 172 | temp1 = *ptr1; /* swap odd column with sign change */ |
| 173 | temp2 = *ptr2; |
| 174 | *ptr1++ = -temp2; |
| 175 | *ptr2++ = -temp1; |
| 176 | } |
| 177 | } |
| 178 | if (x_crop_blocks > 0) { |
| 179 | /* Now left-justify the portion of the data to be kept. |
| 180 | * We can't use a single jcopy_block_row() call because that routine |
| 181 | * depends on memcpy(), whose behavior is unspecified for overlapping |
| 182 | * source and destination areas. Sigh. |
| 183 | */ |
| 184 | for (blk_x = 0; blk_x < compptr->width_in_blocks; blk_x++) { |
| 185 | jcopy_block_row(buffer[offset_y] + blk_x + x_crop_blocks, |
| 186 | buffer[offset_y] + blk_x, |
| 187 | (JDIMENSION) 1); |
| 188 | } |
| 189 | } |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 190 | } |
| 191 | } |
| 192 | } |
| 193 | } |
| 194 | |
| 195 | |
| 196 | LOCAL(void) |
| 197 | do_flip_h (j_decompress_ptr srcinfo, j_compress_ptr dstinfo, |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 198 | JDIMENSION x_crop_offset, JDIMENSION y_crop_offset, |
| 199 | jvirt_barray_ptr *src_coef_arrays, |
| 200 | jvirt_barray_ptr *dst_coef_arrays) |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 201 | /* Horizontal flip in general cropping case */ |
| 202 | { |
| 203 | JDIMENSION MCU_cols, comp_width, dst_blk_x, dst_blk_y; |
| 204 | JDIMENSION x_crop_blocks, y_crop_blocks; |
| 205 | int ci, k, offset_y; |
| 206 | JBLOCKARRAY src_buffer, dst_buffer; |
| 207 | JBLOCKROW src_row_ptr, dst_row_ptr; |
| 208 | JCOEFPTR src_ptr, dst_ptr; |
| 209 | jpeg_component_info *compptr; |
| 210 | |
| 211 | /* Here we must output into a separate array because we can't touch |
| 212 | * different rows of a single virtual array simultaneously. Otherwise, |
| 213 | * this is essentially the same as the routine above. |
| 214 | */ |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 215 | MCU_cols = srcinfo->output_width / |
DRC | c04bd3c | 2010-10-10 02:15:56 +0000 | [diff] [blame] | 216 | (dstinfo->max_h_samp_factor * dstinfo_min_DCT_h_scaled_size); |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 217 | |
| 218 | for (ci = 0; ci < dstinfo->num_components; ci++) { |
| 219 | compptr = dstinfo->comp_info + ci; |
| 220 | comp_width = MCU_cols * compptr->h_samp_factor; |
| 221 | x_crop_blocks = x_crop_offset * compptr->h_samp_factor; |
| 222 | y_crop_blocks = y_crop_offset * compptr->v_samp_factor; |
| 223 | for (dst_blk_y = 0; dst_blk_y < compptr->height_in_blocks; |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 224 | dst_blk_y += compptr->v_samp_factor) { |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 225 | dst_buffer = (*srcinfo->mem->access_virt_barray) |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 226 | ((j_common_ptr) srcinfo, dst_coef_arrays[ci], dst_blk_y, |
| 227 | (JDIMENSION) compptr->v_samp_factor, TRUE); |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 228 | src_buffer = (*srcinfo->mem->access_virt_barray) |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 229 | ((j_common_ptr) srcinfo, src_coef_arrays[ci], |
| 230 | dst_blk_y + y_crop_blocks, |
| 231 | (JDIMENSION) compptr->v_samp_factor, FALSE); |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 232 | for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 233 | dst_row_ptr = dst_buffer[offset_y]; |
| 234 | src_row_ptr = src_buffer[offset_y]; |
| 235 | for (dst_blk_x = 0; dst_blk_x < compptr->width_in_blocks; dst_blk_x++) { |
| 236 | if (x_crop_blocks + dst_blk_x < comp_width) { |
| 237 | /* Do the mirrorable blocks */ |
| 238 | dst_ptr = dst_row_ptr[dst_blk_x]; |
| 239 | src_ptr = src_row_ptr[comp_width - x_crop_blocks - dst_blk_x - 1]; |
| 240 | /* this unrolled loop doesn't need to know which row it's on... */ |
| 241 | for (k = 0; k < DCTSIZE2; k += 2) { |
| 242 | *dst_ptr++ = *src_ptr++; /* copy even column */ |
| 243 | *dst_ptr++ = - *src_ptr++; /* copy odd column with sign change */ |
| 244 | } |
| 245 | } else { |
| 246 | /* Copy last partial block(s) verbatim */ |
| 247 | jcopy_block_row(src_row_ptr + dst_blk_x + x_crop_blocks, |
| 248 | dst_row_ptr + dst_blk_x, |
| 249 | (JDIMENSION) 1); |
| 250 | } |
| 251 | } |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 252 | } |
| 253 | } |
| 254 | } |
| 255 | } |
| 256 | |
| 257 | |
| 258 | LOCAL(void) |
| 259 | do_flip_v (j_decompress_ptr srcinfo, j_compress_ptr dstinfo, |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 260 | JDIMENSION x_crop_offset, JDIMENSION y_crop_offset, |
| 261 | jvirt_barray_ptr *src_coef_arrays, |
| 262 | jvirt_barray_ptr *dst_coef_arrays) |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 263 | /* Vertical flip */ |
| 264 | { |
| 265 | JDIMENSION MCU_rows, comp_height, dst_blk_x, dst_blk_y; |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 266 | JDIMENSION x_crop_blocks, y_crop_blocks; |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 267 | int ci, i, j, offset_y; |
| 268 | JBLOCKARRAY src_buffer, dst_buffer; |
| 269 | JBLOCKROW src_row_ptr, dst_row_ptr; |
| 270 | JCOEFPTR src_ptr, dst_ptr; |
| 271 | jpeg_component_info *compptr; |
| 272 | |
| 273 | /* We output into a separate array because we can't touch different |
| 274 | * rows of the source virtual array simultaneously. Otherwise, this |
| 275 | * is a pretty straightforward analog of horizontal flip. |
| 276 | * Within a DCT block, vertical mirroring is done by changing the signs |
| 277 | * of odd-numbered rows. |
| 278 | * Partial iMCUs at the bottom edge are copied verbatim. |
| 279 | */ |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 280 | MCU_rows = srcinfo->output_height / |
DRC | c04bd3c | 2010-10-10 02:15:56 +0000 | [diff] [blame] | 281 | (dstinfo->max_v_samp_factor * dstinfo_min_DCT_v_scaled_size); |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 282 | |
| 283 | for (ci = 0; ci < dstinfo->num_components; ci++) { |
| 284 | compptr = dstinfo->comp_info + ci; |
| 285 | comp_height = MCU_rows * compptr->v_samp_factor; |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 286 | x_crop_blocks = x_crop_offset * compptr->h_samp_factor; |
| 287 | y_crop_blocks = y_crop_offset * compptr->v_samp_factor; |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 288 | for (dst_blk_y = 0; dst_blk_y < compptr->height_in_blocks; |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 289 | dst_blk_y += compptr->v_samp_factor) { |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 290 | dst_buffer = (*srcinfo->mem->access_virt_barray) |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 291 | ((j_common_ptr) srcinfo, dst_coef_arrays[ci], dst_blk_y, |
| 292 | (JDIMENSION) compptr->v_samp_factor, TRUE); |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 293 | if (y_crop_blocks + dst_blk_y < comp_height) { |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 294 | /* Row is within the mirrorable area. */ |
| 295 | src_buffer = (*srcinfo->mem->access_virt_barray) |
| 296 | ((j_common_ptr) srcinfo, src_coef_arrays[ci], |
| 297 | comp_height - y_crop_blocks - dst_blk_y - |
| 298 | (JDIMENSION) compptr->v_samp_factor, |
| 299 | (JDIMENSION) compptr->v_samp_factor, FALSE); |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 300 | } else { |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 301 | /* Bottom-edge blocks will be copied verbatim. */ |
| 302 | src_buffer = (*srcinfo->mem->access_virt_barray) |
| 303 | ((j_common_ptr) srcinfo, src_coef_arrays[ci], |
| 304 | dst_blk_y + y_crop_blocks, |
| 305 | (JDIMENSION) compptr->v_samp_factor, FALSE); |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 306 | } |
| 307 | for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 308 | if (y_crop_blocks + dst_blk_y < comp_height) { |
| 309 | /* Row is within the mirrorable area. */ |
| 310 | dst_row_ptr = dst_buffer[offset_y]; |
| 311 | src_row_ptr = src_buffer[compptr->v_samp_factor - offset_y - 1]; |
| 312 | src_row_ptr += x_crop_blocks; |
| 313 | for (dst_blk_x = 0; dst_blk_x < compptr->width_in_blocks; |
| 314 | dst_blk_x++) { |
| 315 | dst_ptr = dst_row_ptr[dst_blk_x]; |
| 316 | src_ptr = src_row_ptr[dst_blk_x]; |
| 317 | for (i = 0; i < DCTSIZE; i += 2) { |
| 318 | /* copy even row */ |
| 319 | for (j = 0; j < DCTSIZE; j++) |
| 320 | *dst_ptr++ = *src_ptr++; |
| 321 | /* copy odd row with sign change */ |
| 322 | for (j = 0; j < DCTSIZE; j++) |
| 323 | *dst_ptr++ = - *src_ptr++; |
| 324 | } |
| 325 | } |
| 326 | } else { |
| 327 | /* Just copy row verbatim. */ |
| 328 | jcopy_block_row(src_buffer[offset_y] + x_crop_blocks, |
| 329 | dst_buffer[offset_y], |
| 330 | compptr->width_in_blocks); |
| 331 | } |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 332 | } |
| 333 | } |
| 334 | } |
| 335 | } |
| 336 | |
| 337 | |
| 338 | LOCAL(void) |
| 339 | do_transpose (j_decompress_ptr srcinfo, j_compress_ptr dstinfo, |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 340 | JDIMENSION x_crop_offset, JDIMENSION y_crop_offset, |
| 341 | jvirt_barray_ptr *src_coef_arrays, |
| 342 | jvirt_barray_ptr *dst_coef_arrays) |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 343 | /* Transpose source into destination */ |
| 344 | { |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 345 | JDIMENSION dst_blk_x, dst_blk_y, x_crop_blocks, y_crop_blocks; |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 346 | int ci, i, j, offset_x, offset_y; |
| 347 | JBLOCKARRAY src_buffer, dst_buffer; |
| 348 | JCOEFPTR src_ptr, dst_ptr; |
| 349 | jpeg_component_info *compptr; |
| 350 | |
| 351 | /* Transposing pixels within a block just requires transposing the |
| 352 | * DCT coefficients. |
| 353 | * Partial iMCUs at the edges require no special treatment; we simply |
| 354 | * process all the available DCT blocks for every component. |
| 355 | */ |
| 356 | for (ci = 0; ci < dstinfo->num_components; ci++) { |
| 357 | compptr = dstinfo->comp_info + ci; |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 358 | x_crop_blocks = x_crop_offset * compptr->h_samp_factor; |
| 359 | y_crop_blocks = y_crop_offset * compptr->v_samp_factor; |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 360 | for (dst_blk_y = 0; dst_blk_y < compptr->height_in_blocks; |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 361 | dst_blk_y += compptr->v_samp_factor) { |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 362 | dst_buffer = (*srcinfo->mem->access_virt_barray) |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 363 | ((j_common_ptr) srcinfo, dst_coef_arrays[ci], dst_blk_y, |
| 364 | (JDIMENSION) compptr->v_samp_factor, TRUE); |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 365 | for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 366 | for (dst_blk_x = 0; dst_blk_x < compptr->width_in_blocks; |
| 367 | dst_blk_x += compptr->h_samp_factor) { |
| 368 | src_buffer = (*srcinfo->mem->access_virt_barray) |
| 369 | ((j_common_ptr) srcinfo, src_coef_arrays[ci], |
| 370 | dst_blk_x + x_crop_blocks, |
| 371 | (JDIMENSION) compptr->h_samp_factor, FALSE); |
| 372 | for (offset_x = 0; offset_x < compptr->h_samp_factor; offset_x++) { |
| 373 | dst_ptr = dst_buffer[offset_y][dst_blk_x + offset_x]; |
| 374 | src_ptr = src_buffer[offset_x][dst_blk_y + offset_y + y_crop_blocks]; |
| 375 | for (i = 0; i < DCTSIZE; i++) |
| 376 | for (j = 0; j < DCTSIZE; j++) |
| 377 | dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j]; |
| 378 | } |
| 379 | } |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 380 | } |
| 381 | } |
| 382 | } |
| 383 | } |
| 384 | |
| 385 | |
| 386 | LOCAL(void) |
| 387 | do_rot_90 (j_decompress_ptr srcinfo, j_compress_ptr dstinfo, |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 388 | JDIMENSION x_crop_offset, JDIMENSION y_crop_offset, |
| 389 | jvirt_barray_ptr *src_coef_arrays, |
| 390 | jvirt_barray_ptr *dst_coef_arrays) |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 391 | /* 90 degree rotation is equivalent to |
| 392 | * 1. Transposing the image; |
| 393 | * 2. Horizontal mirroring. |
| 394 | * These two steps are merged into a single processing routine. |
| 395 | */ |
| 396 | { |
| 397 | JDIMENSION MCU_cols, comp_width, dst_blk_x, dst_blk_y; |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 398 | JDIMENSION x_crop_blocks, y_crop_blocks; |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 399 | int ci, i, j, offset_x, offset_y; |
| 400 | JBLOCKARRAY src_buffer, dst_buffer; |
| 401 | JCOEFPTR src_ptr, dst_ptr; |
| 402 | jpeg_component_info *compptr; |
| 403 | |
| 404 | /* Because of the horizontal mirror step, we can't process partial iMCUs |
| 405 | * at the (output) right edge properly. They just get transposed and |
| 406 | * not mirrored. |
| 407 | */ |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 408 | MCU_cols = srcinfo->output_height / |
DRC | c04bd3c | 2010-10-10 02:15:56 +0000 | [diff] [blame] | 409 | (dstinfo->max_h_samp_factor * dstinfo_min_DCT_h_scaled_size); |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 410 | |
| 411 | for (ci = 0; ci < dstinfo->num_components; ci++) { |
| 412 | compptr = dstinfo->comp_info + ci; |
| 413 | comp_width = MCU_cols * compptr->h_samp_factor; |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 414 | x_crop_blocks = x_crop_offset * compptr->h_samp_factor; |
| 415 | y_crop_blocks = y_crop_offset * compptr->v_samp_factor; |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 416 | for (dst_blk_y = 0; dst_blk_y < compptr->height_in_blocks; |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 417 | dst_blk_y += compptr->v_samp_factor) { |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 418 | dst_buffer = (*srcinfo->mem->access_virt_barray) |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 419 | ((j_common_ptr) srcinfo, dst_coef_arrays[ci], dst_blk_y, |
| 420 | (JDIMENSION) compptr->v_samp_factor, TRUE); |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 421 | for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 422 | for (dst_blk_x = 0; dst_blk_x < compptr->width_in_blocks; |
| 423 | dst_blk_x += compptr->h_samp_factor) { |
| 424 | if (x_crop_blocks + dst_blk_x < comp_width) { |
| 425 | /* Block is within the mirrorable area. */ |
| 426 | src_buffer = (*srcinfo->mem->access_virt_barray) |
| 427 | ((j_common_ptr) srcinfo, src_coef_arrays[ci], |
| 428 | comp_width - x_crop_blocks - dst_blk_x - |
| 429 | (JDIMENSION) compptr->h_samp_factor, |
| 430 | (JDIMENSION) compptr->h_samp_factor, FALSE); |
| 431 | } else { |
| 432 | /* Edge blocks are transposed but not mirrored. */ |
| 433 | src_buffer = (*srcinfo->mem->access_virt_barray) |
| 434 | ((j_common_ptr) srcinfo, src_coef_arrays[ci], |
| 435 | dst_blk_x + x_crop_blocks, |
| 436 | (JDIMENSION) compptr->h_samp_factor, FALSE); |
| 437 | } |
| 438 | for (offset_x = 0; offset_x < compptr->h_samp_factor; offset_x++) { |
| 439 | dst_ptr = dst_buffer[offset_y][dst_blk_x + offset_x]; |
| 440 | if (x_crop_blocks + dst_blk_x < comp_width) { |
| 441 | /* Block is within the mirrorable area. */ |
| 442 | src_ptr = src_buffer[compptr->h_samp_factor - offset_x - 1] |
| 443 | [dst_blk_y + offset_y + y_crop_blocks]; |
| 444 | for (i = 0; i < DCTSIZE; i++) { |
| 445 | for (j = 0; j < DCTSIZE; j++) |
| 446 | dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j]; |
| 447 | i++; |
| 448 | for (j = 0; j < DCTSIZE; j++) |
| 449 | dst_ptr[j*DCTSIZE+i] = -src_ptr[i*DCTSIZE+j]; |
| 450 | } |
| 451 | } else { |
| 452 | /* Edge blocks are transposed but not mirrored. */ |
| 453 | src_ptr = src_buffer[offset_x] |
| 454 | [dst_blk_y + offset_y + y_crop_blocks]; |
| 455 | for (i = 0; i < DCTSIZE; i++) |
| 456 | for (j = 0; j < DCTSIZE; j++) |
| 457 | dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j]; |
| 458 | } |
| 459 | } |
| 460 | } |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 461 | } |
| 462 | } |
| 463 | } |
| 464 | } |
| 465 | |
| 466 | |
| 467 | LOCAL(void) |
| 468 | do_rot_270 (j_decompress_ptr srcinfo, j_compress_ptr dstinfo, |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 469 | JDIMENSION x_crop_offset, JDIMENSION y_crop_offset, |
| 470 | jvirt_barray_ptr *src_coef_arrays, |
| 471 | jvirt_barray_ptr *dst_coef_arrays) |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 472 | /* 270 degree rotation is equivalent to |
| 473 | * 1. Horizontal mirroring; |
| 474 | * 2. Transposing the image. |
| 475 | * These two steps are merged into a single processing routine. |
| 476 | */ |
| 477 | { |
| 478 | JDIMENSION MCU_rows, comp_height, dst_blk_x, dst_blk_y; |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 479 | JDIMENSION x_crop_blocks, y_crop_blocks; |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 480 | int ci, i, j, offset_x, offset_y; |
| 481 | JBLOCKARRAY src_buffer, dst_buffer; |
| 482 | JCOEFPTR src_ptr, dst_ptr; |
| 483 | jpeg_component_info *compptr; |
| 484 | |
| 485 | /* Because of the horizontal mirror step, we can't process partial iMCUs |
| 486 | * at the (output) bottom edge properly. They just get transposed and |
| 487 | * not mirrored. |
| 488 | */ |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 489 | MCU_rows = srcinfo->output_width / |
DRC | c04bd3c | 2010-10-10 02:15:56 +0000 | [diff] [blame] | 490 | (dstinfo->max_v_samp_factor * dstinfo_min_DCT_v_scaled_size); |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 491 | |
| 492 | for (ci = 0; ci < dstinfo->num_components; ci++) { |
| 493 | compptr = dstinfo->comp_info + ci; |
| 494 | comp_height = MCU_rows * compptr->v_samp_factor; |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 495 | x_crop_blocks = x_crop_offset * compptr->h_samp_factor; |
| 496 | y_crop_blocks = y_crop_offset * compptr->v_samp_factor; |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 497 | for (dst_blk_y = 0; dst_blk_y < compptr->height_in_blocks; |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 498 | dst_blk_y += compptr->v_samp_factor) { |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 499 | dst_buffer = (*srcinfo->mem->access_virt_barray) |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 500 | ((j_common_ptr) srcinfo, dst_coef_arrays[ci], dst_blk_y, |
| 501 | (JDIMENSION) compptr->v_samp_factor, TRUE); |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 502 | for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 503 | for (dst_blk_x = 0; dst_blk_x < compptr->width_in_blocks; |
| 504 | dst_blk_x += compptr->h_samp_factor) { |
| 505 | src_buffer = (*srcinfo->mem->access_virt_barray) |
| 506 | ((j_common_ptr) srcinfo, src_coef_arrays[ci], |
| 507 | dst_blk_x + x_crop_blocks, |
| 508 | (JDIMENSION) compptr->h_samp_factor, FALSE); |
| 509 | for (offset_x = 0; offset_x < compptr->h_samp_factor; offset_x++) { |
| 510 | dst_ptr = dst_buffer[offset_y][dst_blk_x + offset_x]; |
| 511 | if (y_crop_blocks + dst_blk_y < comp_height) { |
| 512 | /* Block is within the mirrorable area. */ |
| 513 | src_ptr = src_buffer[offset_x] |
| 514 | [comp_height - y_crop_blocks - dst_blk_y - offset_y - 1]; |
| 515 | for (i = 0; i < DCTSIZE; i++) { |
| 516 | for (j = 0; j < DCTSIZE; j++) { |
| 517 | dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j]; |
| 518 | j++; |
| 519 | dst_ptr[j*DCTSIZE+i] = -src_ptr[i*DCTSIZE+j]; |
| 520 | } |
| 521 | } |
| 522 | } else { |
| 523 | /* Edge blocks are transposed but not mirrored. */ |
| 524 | src_ptr = src_buffer[offset_x] |
| 525 | [dst_blk_y + offset_y + y_crop_blocks]; |
| 526 | for (i = 0; i < DCTSIZE; i++) |
| 527 | for (j = 0; j < DCTSIZE; j++) |
| 528 | dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j]; |
| 529 | } |
| 530 | } |
| 531 | } |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 532 | } |
| 533 | } |
| 534 | } |
| 535 | } |
| 536 | |
| 537 | |
| 538 | LOCAL(void) |
| 539 | do_rot_180 (j_decompress_ptr srcinfo, j_compress_ptr dstinfo, |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 540 | JDIMENSION x_crop_offset, JDIMENSION y_crop_offset, |
| 541 | jvirt_barray_ptr *src_coef_arrays, |
| 542 | jvirt_barray_ptr *dst_coef_arrays) |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 543 | /* 180 degree rotation is equivalent to |
| 544 | * 1. Vertical mirroring; |
| 545 | * 2. Horizontal mirroring. |
| 546 | * These two steps are merged into a single processing routine. |
| 547 | */ |
| 548 | { |
| 549 | JDIMENSION MCU_cols, MCU_rows, comp_width, comp_height, dst_blk_x, dst_blk_y; |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 550 | JDIMENSION x_crop_blocks, y_crop_blocks; |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 551 | int ci, i, j, offset_y; |
| 552 | JBLOCKARRAY src_buffer, dst_buffer; |
| 553 | JBLOCKROW src_row_ptr, dst_row_ptr; |
| 554 | JCOEFPTR src_ptr, dst_ptr; |
| 555 | jpeg_component_info *compptr; |
| 556 | |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 557 | MCU_cols = srcinfo->output_width / |
DRC | c04bd3c | 2010-10-10 02:15:56 +0000 | [diff] [blame] | 558 | (dstinfo->max_h_samp_factor * dstinfo_min_DCT_h_scaled_size); |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 559 | MCU_rows = srcinfo->output_height / |
DRC | c04bd3c | 2010-10-10 02:15:56 +0000 | [diff] [blame] | 560 | (dstinfo->max_v_samp_factor * dstinfo_min_DCT_v_scaled_size); |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 561 | |
| 562 | for (ci = 0; ci < dstinfo->num_components; ci++) { |
| 563 | compptr = dstinfo->comp_info + ci; |
| 564 | comp_width = MCU_cols * compptr->h_samp_factor; |
| 565 | comp_height = MCU_rows * compptr->v_samp_factor; |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 566 | x_crop_blocks = x_crop_offset * compptr->h_samp_factor; |
| 567 | y_crop_blocks = y_crop_offset * compptr->v_samp_factor; |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 568 | for (dst_blk_y = 0; dst_blk_y < compptr->height_in_blocks; |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 569 | dst_blk_y += compptr->v_samp_factor) { |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 570 | dst_buffer = (*srcinfo->mem->access_virt_barray) |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 571 | ((j_common_ptr) srcinfo, dst_coef_arrays[ci], dst_blk_y, |
| 572 | (JDIMENSION) compptr->v_samp_factor, TRUE); |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 573 | if (y_crop_blocks + dst_blk_y < comp_height) { |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 574 | /* Row is within the vertically mirrorable area. */ |
| 575 | src_buffer = (*srcinfo->mem->access_virt_barray) |
| 576 | ((j_common_ptr) srcinfo, src_coef_arrays[ci], |
| 577 | comp_height - y_crop_blocks - dst_blk_y - |
| 578 | (JDIMENSION) compptr->v_samp_factor, |
| 579 | (JDIMENSION) compptr->v_samp_factor, FALSE); |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 580 | } else { |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 581 | /* Bottom-edge rows are only mirrored horizontally. */ |
| 582 | src_buffer = (*srcinfo->mem->access_virt_barray) |
| 583 | ((j_common_ptr) srcinfo, src_coef_arrays[ci], |
| 584 | dst_blk_y + y_crop_blocks, |
| 585 | (JDIMENSION) compptr->v_samp_factor, FALSE); |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 586 | } |
| 587 | for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 588 | dst_row_ptr = dst_buffer[offset_y]; |
| 589 | if (y_crop_blocks + dst_blk_y < comp_height) { |
| 590 | /* Row is within the mirrorable area. */ |
| 591 | src_row_ptr = src_buffer[compptr->v_samp_factor - offset_y - 1]; |
| 592 | for (dst_blk_x = 0; dst_blk_x < compptr->width_in_blocks; dst_blk_x++) { |
| 593 | dst_ptr = dst_row_ptr[dst_blk_x]; |
| 594 | if (x_crop_blocks + dst_blk_x < comp_width) { |
| 595 | /* Process the blocks that can be mirrored both ways. */ |
| 596 | src_ptr = src_row_ptr[comp_width - x_crop_blocks - dst_blk_x - 1]; |
| 597 | for (i = 0; i < DCTSIZE; i += 2) { |
| 598 | /* For even row, negate every odd column. */ |
| 599 | for (j = 0; j < DCTSIZE; j += 2) { |
| 600 | *dst_ptr++ = *src_ptr++; |
| 601 | *dst_ptr++ = - *src_ptr++; |
| 602 | } |
| 603 | /* For odd row, negate every even column. */ |
| 604 | for (j = 0; j < DCTSIZE; j += 2) { |
| 605 | *dst_ptr++ = - *src_ptr++; |
| 606 | *dst_ptr++ = *src_ptr++; |
| 607 | } |
| 608 | } |
| 609 | } else { |
| 610 | /* Any remaining right-edge blocks are only mirrored vertically. */ |
| 611 | src_ptr = src_row_ptr[x_crop_blocks + dst_blk_x]; |
| 612 | for (i = 0; i < DCTSIZE; i += 2) { |
| 613 | for (j = 0; j < DCTSIZE; j++) |
| 614 | *dst_ptr++ = *src_ptr++; |
| 615 | for (j = 0; j < DCTSIZE; j++) |
| 616 | *dst_ptr++ = - *src_ptr++; |
| 617 | } |
| 618 | } |
| 619 | } |
| 620 | } else { |
| 621 | /* Remaining rows are just mirrored horizontally. */ |
| 622 | src_row_ptr = src_buffer[offset_y]; |
| 623 | for (dst_blk_x = 0; dst_blk_x < compptr->width_in_blocks; dst_blk_x++) { |
| 624 | if (x_crop_blocks + dst_blk_x < comp_width) { |
| 625 | /* Process the blocks that can be mirrored. */ |
| 626 | dst_ptr = dst_row_ptr[dst_blk_x]; |
| 627 | src_ptr = src_row_ptr[comp_width - x_crop_blocks - dst_blk_x - 1]; |
| 628 | for (i = 0; i < DCTSIZE2; i += 2) { |
| 629 | *dst_ptr++ = *src_ptr++; |
| 630 | *dst_ptr++ = - *src_ptr++; |
| 631 | } |
| 632 | } else { |
| 633 | /* Any remaining right-edge blocks are only copied. */ |
| 634 | jcopy_block_row(src_row_ptr + dst_blk_x + x_crop_blocks, |
| 635 | dst_row_ptr + dst_blk_x, |
| 636 | (JDIMENSION) 1); |
| 637 | } |
| 638 | } |
| 639 | } |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 640 | } |
| 641 | } |
| 642 | } |
| 643 | } |
| 644 | |
| 645 | |
| 646 | LOCAL(void) |
| 647 | do_transverse (j_decompress_ptr srcinfo, j_compress_ptr dstinfo, |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 648 | JDIMENSION x_crop_offset, JDIMENSION y_crop_offset, |
| 649 | jvirt_barray_ptr *src_coef_arrays, |
| 650 | jvirt_barray_ptr *dst_coef_arrays) |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 651 | /* Transverse transpose is equivalent to |
| 652 | * 1. 180 degree rotation; |
| 653 | * 2. Transposition; |
| 654 | * or |
| 655 | * 1. Horizontal mirroring; |
| 656 | * 2. Transposition; |
| 657 | * 3. Horizontal mirroring. |
| 658 | * These steps are merged into a single processing routine. |
| 659 | */ |
| 660 | { |
| 661 | JDIMENSION MCU_cols, MCU_rows, comp_width, comp_height, dst_blk_x, dst_blk_y; |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 662 | JDIMENSION x_crop_blocks, y_crop_blocks; |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 663 | int ci, i, j, offset_x, offset_y; |
| 664 | JBLOCKARRAY src_buffer, dst_buffer; |
| 665 | JCOEFPTR src_ptr, dst_ptr; |
| 666 | jpeg_component_info *compptr; |
| 667 | |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 668 | MCU_cols = srcinfo->output_height / |
DRC | c04bd3c | 2010-10-10 02:15:56 +0000 | [diff] [blame] | 669 | (dstinfo->max_h_samp_factor * dstinfo_min_DCT_h_scaled_size); |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 670 | MCU_rows = srcinfo->output_width / |
DRC | c04bd3c | 2010-10-10 02:15:56 +0000 | [diff] [blame] | 671 | (dstinfo->max_v_samp_factor * dstinfo_min_DCT_v_scaled_size); |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 672 | |
| 673 | for (ci = 0; ci < dstinfo->num_components; ci++) { |
| 674 | compptr = dstinfo->comp_info + ci; |
| 675 | comp_width = MCU_cols * compptr->h_samp_factor; |
| 676 | comp_height = MCU_rows * compptr->v_samp_factor; |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 677 | x_crop_blocks = x_crop_offset * compptr->h_samp_factor; |
| 678 | y_crop_blocks = y_crop_offset * compptr->v_samp_factor; |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 679 | for (dst_blk_y = 0; dst_blk_y < compptr->height_in_blocks; |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 680 | dst_blk_y += compptr->v_samp_factor) { |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 681 | dst_buffer = (*srcinfo->mem->access_virt_barray) |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 682 | ((j_common_ptr) srcinfo, dst_coef_arrays[ci], dst_blk_y, |
| 683 | (JDIMENSION) compptr->v_samp_factor, TRUE); |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 684 | for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 685 | for (dst_blk_x = 0; dst_blk_x < compptr->width_in_blocks; |
| 686 | dst_blk_x += compptr->h_samp_factor) { |
| 687 | if (x_crop_blocks + dst_blk_x < comp_width) { |
| 688 | /* Block is within the mirrorable area. */ |
| 689 | src_buffer = (*srcinfo->mem->access_virt_barray) |
| 690 | ((j_common_ptr) srcinfo, src_coef_arrays[ci], |
| 691 | comp_width - x_crop_blocks - dst_blk_x - |
| 692 | (JDIMENSION) compptr->h_samp_factor, |
| 693 | (JDIMENSION) compptr->h_samp_factor, FALSE); |
| 694 | } else { |
| 695 | src_buffer = (*srcinfo->mem->access_virt_barray) |
| 696 | ((j_common_ptr) srcinfo, src_coef_arrays[ci], |
| 697 | dst_blk_x + x_crop_blocks, |
| 698 | (JDIMENSION) compptr->h_samp_factor, FALSE); |
| 699 | } |
| 700 | for (offset_x = 0; offset_x < compptr->h_samp_factor; offset_x++) { |
| 701 | dst_ptr = dst_buffer[offset_y][dst_blk_x + offset_x]; |
| 702 | if (y_crop_blocks + dst_blk_y < comp_height) { |
| 703 | if (x_crop_blocks + dst_blk_x < comp_width) { |
| 704 | /* Block is within the mirrorable area. */ |
| 705 | src_ptr = src_buffer[compptr->h_samp_factor - offset_x - 1] |
| 706 | [comp_height - y_crop_blocks - dst_blk_y - offset_y - 1]; |
| 707 | for (i = 0; i < DCTSIZE; i++) { |
| 708 | for (j = 0; j < DCTSIZE; j++) { |
| 709 | dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j]; |
| 710 | j++; |
| 711 | dst_ptr[j*DCTSIZE+i] = -src_ptr[i*DCTSIZE+j]; |
| 712 | } |
| 713 | i++; |
| 714 | for (j = 0; j < DCTSIZE; j++) { |
| 715 | dst_ptr[j*DCTSIZE+i] = -src_ptr[i*DCTSIZE+j]; |
| 716 | j++; |
| 717 | dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j]; |
| 718 | } |
| 719 | } |
| 720 | } else { |
| 721 | /* Right-edge blocks are mirrored in y only */ |
| 722 | src_ptr = src_buffer[offset_x] |
| 723 | [comp_height - y_crop_blocks - dst_blk_y - offset_y - 1]; |
| 724 | for (i = 0; i < DCTSIZE; i++) { |
| 725 | for (j = 0; j < DCTSIZE; j++) { |
| 726 | dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j]; |
| 727 | j++; |
| 728 | dst_ptr[j*DCTSIZE+i] = -src_ptr[i*DCTSIZE+j]; |
| 729 | } |
| 730 | } |
| 731 | } |
| 732 | } else { |
| 733 | if (x_crop_blocks + dst_blk_x < comp_width) { |
| 734 | /* Bottom-edge blocks are mirrored in x only */ |
| 735 | src_ptr = src_buffer[compptr->h_samp_factor - offset_x - 1] |
| 736 | [dst_blk_y + offset_y + y_crop_blocks]; |
| 737 | for (i = 0; i < DCTSIZE; i++) { |
| 738 | for (j = 0; j < DCTSIZE; j++) |
| 739 | dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j]; |
| 740 | i++; |
| 741 | for (j = 0; j < DCTSIZE; j++) |
| 742 | dst_ptr[j*DCTSIZE+i] = -src_ptr[i*DCTSIZE+j]; |
| 743 | } |
| 744 | } else { |
| 745 | /* At lower right corner, just transpose, no mirroring */ |
| 746 | src_ptr = src_buffer[offset_x] |
| 747 | [dst_blk_y + offset_y + y_crop_blocks]; |
| 748 | for (i = 0; i < DCTSIZE; i++) |
| 749 | for (j = 0; j < DCTSIZE; j++) |
| 750 | dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j]; |
| 751 | } |
| 752 | } |
| 753 | } |
| 754 | } |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 755 | } |
| 756 | } |
| 757 | } |
| 758 | } |
| 759 | |
| 760 | |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 761 | /* Parse an unsigned integer: subroutine for jtransform_parse_crop_spec. |
| 762 | * Returns TRUE if valid integer found, FALSE if not. |
| 763 | * *strptr is advanced over the digit string, and *result is set to its value. |
| 764 | */ |
| 765 | |
| 766 | LOCAL(boolean) |
Alex Naidis | 6eb7d37 | 2016-10-16 23:10:08 +0200 | [diff] [blame] | 767 | jt_read_integer (const char **strptr, JDIMENSION *result) |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 768 | { |
Alex Naidis | 6eb7d37 | 2016-10-16 23:10:08 +0200 | [diff] [blame] | 769 | const char *ptr = *strptr; |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 770 | JDIMENSION val = 0; |
| 771 | |
| 772 | for (; isdigit(*ptr); ptr++) { |
| 773 | val = val * 10 + (JDIMENSION) (*ptr - '0'); |
| 774 | } |
| 775 | *result = val; |
| 776 | if (ptr == *strptr) |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 777 | return FALSE; /* oops, no digits */ |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 778 | *strptr = ptr; |
| 779 | return TRUE; |
| 780 | } |
| 781 | |
| 782 | |
| 783 | /* Parse a crop specification (written in X11 geometry style). |
| 784 | * The routine returns TRUE if the spec string is valid, FALSE if not. |
| 785 | * |
| 786 | * The crop spec string should have the format |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 787 | * <width>[f]x<height>[f]{+-}<xoffset>{+-}<yoffset> |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 788 | * where width, height, xoffset, and yoffset are unsigned integers. |
| 789 | * Each of the elements can be omitted to indicate a default value. |
| 790 | * (A weakness of this style is that it is not possible to omit xoffset |
| 791 | * while specifying yoffset, since they look alike.) |
| 792 | * |
| 793 | * This code is loosely based on XParseGeometry from the X11 distribution. |
| 794 | */ |
| 795 | |
| 796 | GLOBAL(boolean) |
| 797 | jtransform_parse_crop_spec (jpeg_transform_info *info, const char *spec) |
| 798 | { |
| 799 | info->crop = FALSE; |
| 800 | info->crop_width_set = JCROP_UNSET; |
| 801 | info->crop_height_set = JCROP_UNSET; |
| 802 | info->crop_xoffset_set = JCROP_UNSET; |
| 803 | info->crop_yoffset_set = JCROP_UNSET; |
| 804 | |
| 805 | if (isdigit(*spec)) { |
| 806 | /* fetch width */ |
| 807 | if (! jt_read_integer(&spec, &info->crop_width)) |
| 808 | return FALSE; |
Guido Vollbeding | 5829cb2 | 2012-01-15 00:00:00 +0000 | [diff] [blame] | 809 | if (*spec == 'f' || *spec == 'F') { |
| 810 | spec++; |
| 811 | info->crop_width_set = JCROP_FORCE; |
| 812 | } else |
| 813 | info->crop_width_set = JCROP_POS; |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 814 | } |
Guido Vollbeding | 5829cb2 | 2012-01-15 00:00:00 +0000 | [diff] [blame] | 815 | if (*spec == 'x' || *spec == 'X') { |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 816 | /* fetch height */ |
| 817 | spec++; |
| 818 | if (! jt_read_integer(&spec, &info->crop_height)) |
| 819 | return FALSE; |
Guido Vollbeding | 5829cb2 | 2012-01-15 00:00:00 +0000 | [diff] [blame] | 820 | if (*spec == 'f' || *spec == 'F') { |
| 821 | spec++; |
| 822 | info->crop_height_set = JCROP_FORCE; |
| 823 | } else |
| 824 | info->crop_height_set = JCROP_POS; |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 825 | } |
| 826 | if (*spec == '+' || *spec == '-') { |
| 827 | /* fetch xoffset */ |
| 828 | info->crop_xoffset_set = (*spec == '-') ? JCROP_NEG : JCROP_POS; |
| 829 | spec++; |
| 830 | if (! jt_read_integer(&spec, &info->crop_xoffset)) |
| 831 | return FALSE; |
| 832 | } |
| 833 | if (*spec == '+' || *spec == '-') { |
| 834 | /* fetch yoffset */ |
| 835 | info->crop_yoffset_set = (*spec == '-') ? JCROP_NEG : JCROP_POS; |
| 836 | spec++; |
| 837 | if (! jt_read_integer(&spec, &info->crop_yoffset)) |
| 838 | return FALSE; |
| 839 | } |
| 840 | /* We had better have gotten to the end of the string. */ |
| 841 | if (*spec != '\0') |
| 842 | return FALSE; |
| 843 | info->crop = TRUE; |
| 844 | return TRUE; |
| 845 | } |
| 846 | |
| 847 | |
| 848 | /* Trim off any partial iMCUs on the indicated destination edge */ |
| 849 | |
| 850 | LOCAL(void) |
| 851 | trim_right_edge (jpeg_transform_info *info, JDIMENSION full_width) |
| 852 | { |
| 853 | JDIMENSION MCU_cols; |
| 854 | |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 855 | MCU_cols = info->output_width / info->iMCU_sample_width; |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 856 | if (MCU_cols > 0 && info->x_crop_offset + MCU_cols == |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 857 | full_width / info->iMCU_sample_width) |
| 858 | info->output_width = MCU_cols * info->iMCU_sample_width; |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 859 | } |
| 860 | |
| 861 | LOCAL(void) |
| 862 | trim_bottom_edge (jpeg_transform_info *info, JDIMENSION full_height) |
| 863 | { |
| 864 | JDIMENSION MCU_rows; |
| 865 | |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 866 | MCU_rows = info->output_height / info->iMCU_sample_height; |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 867 | if (MCU_rows > 0 && info->y_crop_offset + MCU_rows == |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 868 | full_height / info->iMCU_sample_height) |
| 869 | info->output_height = MCU_rows * info->iMCU_sample_height; |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 870 | } |
| 871 | |
| 872 | |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 873 | /* Request any required workspace. |
| 874 | * |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 875 | * This routine figures out the size that the output image will be |
| 876 | * (which implies that all the transform parameters must be set before |
| 877 | * it is called). |
| 878 | * |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 879 | * We allocate the workspace virtual arrays from the source decompression |
| 880 | * object, so that all the arrays (both the original data and the workspace) |
| 881 | * will be taken into account while making memory management decisions. |
| 882 | * Hence, this routine must be called after jpeg_read_header (which reads |
| 883 | * the image dimensions) and before jpeg_read_coefficients (which realizes |
| 884 | * the source's virtual arrays). |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 885 | * |
| 886 | * This function returns FALSE right away if -perfect is given |
| 887 | * and transformation is not perfect. Otherwise returns TRUE. |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 888 | */ |
| 889 | |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 890 | GLOBAL(boolean) |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 891 | jtransform_request_workspace (j_decompress_ptr srcinfo, |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 892 | jpeg_transform_info *info) |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 893 | { |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 894 | jvirt_barray_ptr *coef_arrays; |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 895 | boolean need_workspace, transpose_it; |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 896 | jpeg_component_info *compptr; |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 897 | JDIMENSION xoffset, yoffset; |
| 898 | JDIMENSION width_in_iMCUs, height_in_iMCUs; |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 899 | JDIMENSION width_in_blocks, height_in_blocks; |
| 900 | int ci, h_samp_factor, v_samp_factor; |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 901 | |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 902 | /* Determine number of components in output image */ |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 903 | if (info->force_grayscale && |
| 904 | srcinfo->jpeg_color_space == JCS_YCbCr && |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 905 | srcinfo->num_components == 3) |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 906 | /* We'll only process the first component */ |
| 907 | info->num_components = 1; |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 908 | else |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 909 | /* Process all the components */ |
| 910 | info->num_components = srcinfo->num_components; |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 911 | |
| 912 | /* Compute output image dimensions and related values. */ |
DRC | c04bd3c | 2010-10-10 02:15:56 +0000 | [diff] [blame] | 913 | #if JPEG_LIB_VERSION >= 80 |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 914 | jpeg_core_output_dimensions(srcinfo); |
DRC | c04bd3c | 2010-10-10 02:15:56 +0000 | [diff] [blame] | 915 | #else |
| 916 | srcinfo->output_width = srcinfo->image_width; |
| 917 | srcinfo->output_height = srcinfo->image_height; |
| 918 | #endif |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 919 | |
| 920 | /* Return right away if -perfect is given and transformation is not perfect. |
| 921 | */ |
| 922 | if (info->perfect) { |
| 923 | if (info->num_components == 1) { |
| 924 | if (!jtransform_perfect_transform(srcinfo->output_width, |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 925 | srcinfo->output_height, |
| 926 | srcinfo->_min_DCT_h_scaled_size, |
| 927 | srcinfo->_min_DCT_v_scaled_size, |
| 928 | info->transform)) |
| 929 | return FALSE; |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 930 | } else { |
| 931 | if (!jtransform_perfect_transform(srcinfo->output_width, |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 932 | srcinfo->output_height, |
| 933 | srcinfo->max_h_samp_factor * srcinfo->_min_DCT_h_scaled_size, |
| 934 | srcinfo->max_v_samp_factor * srcinfo->_min_DCT_v_scaled_size, |
| 935 | info->transform)) |
| 936 | return FALSE; |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 937 | } |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 938 | } |
| 939 | |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 940 | /* If there is only one output component, force the iMCU size to be 1; |
| 941 | * else use the source iMCU size. (This allows us to do the right thing |
| 942 | * when reducing color to grayscale, and also provides a handy way of |
| 943 | * cleaning up "funny" grayscale images whose sampling factors are not 1x1.) |
| 944 | */ |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 945 | switch (info->transform) { |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 946 | case JXFORM_TRANSPOSE: |
| 947 | case JXFORM_TRANSVERSE: |
| 948 | case JXFORM_ROT_90: |
| 949 | case JXFORM_ROT_270: |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 950 | info->output_width = srcinfo->output_height; |
| 951 | info->output_height = srcinfo->output_width; |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 952 | if (info->num_components == 1) { |
DRC | c04bd3c | 2010-10-10 02:15:56 +0000 | [diff] [blame] | 953 | info->iMCU_sample_width = srcinfo->_min_DCT_v_scaled_size; |
| 954 | info->iMCU_sample_height = srcinfo->_min_DCT_h_scaled_size; |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 955 | } else { |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 956 | info->iMCU_sample_width = |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 957 | srcinfo->max_v_samp_factor * srcinfo->_min_DCT_v_scaled_size; |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 958 | info->iMCU_sample_height = |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 959 | srcinfo->max_h_samp_factor * srcinfo->_min_DCT_h_scaled_size; |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 960 | } |
| 961 | break; |
| 962 | default: |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 963 | info->output_width = srcinfo->output_width; |
| 964 | info->output_height = srcinfo->output_height; |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 965 | if (info->num_components == 1) { |
DRC | c04bd3c | 2010-10-10 02:15:56 +0000 | [diff] [blame] | 966 | info->iMCU_sample_width = srcinfo->_min_DCT_h_scaled_size; |
| 967 | info->iMCU_sample_height = srcinfo->_min_DCT_v_scaled_size; |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 968 | } else { |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 969 | info->iMCU_sample_width = |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 970 | srcinfo->max_h_samp_factor * srcinfo->_min_DCT_h_scaled_size; |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 971 | info->iMCU_sample_height = |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 972 | srcinfo->max_v_samp_factor * srcinfo->_min_DCT_v_scaled_size; |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 973 | } |
| 974 | break; |
| 975 | } |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 976 | |
| 977 | /* If cropping has been requested, compute the crop area's position and |
| 978 | * dimensions, ensuring that its upper left corner falls at an iMCU boundary. |
| 979 | */ |
| 980 | if (info->crop) { |
| 981 | /* Insert default values for unset crop parameters */ |
| 982 | if (info->crop_xoffset_set == JCROP_UNSET) |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 983 | info->crop_xoffset = 0; /* default to +0 */ |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 984 | if (info->crop_yoffset_set == JCROP_UNSET) |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 985 | info->crop_yoffset = 0; /* default to +0 */ |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 986 | if (info->crop_xoffset >= info->output_width || |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 987 | info->crop_yoffset >= info->output_height) |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 988 | ERREXIT(srcinfo, JERR_BAD_CROP_SPEC); |
| 989 | if (info->crop_width_set == JCROP_UNSET) |
| 990 | info->crop_width = info->output_width - info->crop_xoffset; |
| 991 | if (info->crop_height_set == JCROP_UNSET) |
| 992 | info->crop_height = info->output_height - info->crop_yoffset; |
| 993 | /* Ensure parameters are valid */ |
| 994 | if (info->crop_width <= 0 || info->crop_width > info->output_width || |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 995 | info->crop_height <= 0 || info->crop_height > info->output_height || |
| 996 | info->crop_xoffset > info->output_width - info->crop_width || |
| 997 | info->crop_yoffset > info->output_height - info->crop_height) |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 998 | ERREXIT(srcinfo, JERR_BAD_CROP_SPEC); |
| 999 | /* Convert negative crop offsets into regular offsets */ |
| 1000 | if (info->crop_xoffset_set == JCROP_NEG) |
| 1001 | xoffset = info->output_width - info->crop_width - info->crop_xoffset; |
| 1002 | else |
| 1003 | xoffset = info->crop_xoffset; |
| 1004 | if (info->crop_yoffset_set == JCROP_NEG) |
| 1005 | yoffset = info->output_height - info->crop_height - info->crop_yoffset; |
| 1006 | else |
| 1007 | yoffset = info->crop_yoffset; |
| 1008 | /* Now adjust so that upper left corner falls at an iMCU boundary */ |
Guido Vollbeding | 5829cb2 | 2012-01-15 00:00:00 +0000 | [diff] [blame] | 1009 | if (info->crop_width_set == JCROP_FORCE) |
| 1010 | info->output_width = info->crop_width; |
| 1011 | else |
| 1012 | info->output_width = |
| 1013 | info->crop_width + (xoffset % info->iMCU_sample_width); |
| 1014 | if (info->crop_height_set == JCROP_FORCE) |
| 1015 | info->output_height = info->crop_height; |
| 1016 | else |
| 1017 | info->output_height = |
| 1018 | info->crop_height + (yoffset % info->iMCU_sample_height); |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1019 | /* Save x/y offsets measured in iMCUs */ |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 1020 | info->x_crop_offset = xoffset / info->iMCU_sample_width; |
| 1021 | info->y_crop_offset = yoffset / info->iMCU_sample_height; |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1022 | } else { |
| 1023 | info->x_crop_offset = 0; |
| 1024 | info->y_crop_offset = 0; |
| 1025 | } |
| 1026 | |
| 1027 | /* Figure out whether we need workspace arrays, |
| 1028 | * and if so whether they are transposed relative to the source. |
| 1029 | */ |
| 1030 | need_workspace = FALSE; |
| 1031 | transpose_it = FALSE; |
| 1032 | switch (info->transform) { |
| 1033 | case JXFORM_NONE: |
| 1034 | if (info->x_crop_offset != 0 || info->y_crop_offset != 0) |
| 1035 | need_workspace = TRUE; |
| 1036 | /* No workspace needed if neither cropping nor transforming */ |
| 1037 | break; |
| 1038 | case JXFORM_FLIP_H: |
| 1039 | if (info->trim) |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 1040 | trim_right_edge(info, srcinfo->output_width); |
DRC | ba5ea51 | 2011-03-04 03:20:34 +0000 | [diff] [blame] | 1041 | if (info->y_crop_offset != 0 || info->slow_hflip) |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1042 | need_workspace = TRUE; |
| 1043 | /* do_flip_h_no_crop doesn't need a workspace array */ |
| 1044 | break; |
| 1045 | case JXFORM_FLIP_V: |
| 1046 | if (info->trim) |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 1047 | trim_bottom_edge(info, srcinfo->output_height); |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1048 | /* Need workspace arrays having same dimensions as source image. */ |
| 1049 | need_workspace = TRUE; |
| 1050 | break; |
| 1051 | case JXFORM_TRANSPOSE: |
| 1052 | /* transpose does NOT have to trim anything */ |
| 1053 | /* Need workspace arrays having transposed dimensions. */ |
| 1054 | need_workspace = TRUE; |
| 1055 | transpose_it = TRUE; |
| 1056 | break; |
| 1057 | case JXFORM_TRANSVERSE: |
| 1058 | if (info->trim) { |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 1059 | trim_right_edge(info, srcinfo->output_height); |
| 1060 | trim_bottom_edge(info, srcinfo->output_width); |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1061 | } |
| 1062 | /* Need workspace arrays having transposed dimensions. */ |
| 1063 | need_workspace = TRUE; |
| 1064 | transpose_it = TRUE; |
| 1065 | break; |
| 1066 | case JXFORM_ROT_90: |
| 1067 | if (info->trim) |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 1068 | trim_right_edge(info, srcinfo->output_height); |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1069 | /* Need workspace arrays having transposed dimensions. */ |
| 1070 | need_workspace = TRUE; |
| 1071 | transpose_it = TRUE; |
| 1072 | break; |
| 1073 | case JXFORM_ROT_180: |
| 1074 | if (info->trim) { |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 1075 | trim_right_edge(info, srcinfo->output_width); |
| 1076 | trim_bottom_edge(info, srcinfo->output_height); |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1077 | } |
| 1078 | /* Need workspace arrays having same dimensions as source image. */ |
| 1079 | need_workspace = TRUE; |
| 1080 | break; |
| 1081 | case JXFORM_ROT_270: |
| 1082 | if (info->trim) |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 1083 | trim_bottom_edge(info, srcinfo->output_width); |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1084 | /* Need workspace arrays having transposed dimensions. */ |
| 1085 | need_workspace = TRUE; |
| 1086 | transpose_it = TRUE; |
| 1087 | break; |
| 1088 | } |
| 1089 | |
| 1090 | /* Allocate workspace if needed. |
| 1091 | * Note that we allocate arrays padded out to the next iMCU boundary, |
| 1092 | * so that transform routines need not worry about missing edge blocks. |
| 1093 | */ |
| 1094 | if (need_workspace) { |
| 1095 | coef_arrays = (jvirt_barray_ptr *) |
| 1096 | (*srcinfo->mem->alloc_small) ((j_common_ptr) srcinfo, JPOOL_IMAGE, |
DRC | 5de454b | 2014-05-18 19:04:03 +0000 | [diff] [blame] | 1097 | sizeof(jvirt_barray_ptr) * info->num_components); |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1098 | width_in_iMCUs = (JDIMENSION) |
| 1099 | jdiv_round_up((long) info->output_width, |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 1100 | (long) info->iMCU_sample_width); |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1101 | height_in_iMCUs = (JDIMENSION) |
| 1102 | jdiv_round_up((long) info->output_height, |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 1103 | (long) info->iMCU_sample_height); |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1104 | for (ci = 0; ci < info->num_components; ci++) { |
| 1105 | compptr = srcinfo->comp_info + ci; |
| 1106 | if (info->num_components == 1) { |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 1107 | /* we're going to force samp factors to 1x1 in this case */ |
| 1108 | h_samp_factor = v_samp_factor = 1; |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1109 | } else if (transpose_it) { |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 1110 | h_samp_factor = compptr->v_samp_factor; |
| 1111 | v_samp_factor = compptr->h_samp_factor; |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1112 | } else { |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 1113 | h_samp_factor = compptr->h_samp_factor; |
| 1114 | v_samp_factor = compptr->v_samp_factor; |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1115 | } |
| 1116 | width_in_blocks = width_in_iMCUs * h_samp_factor; |
| 1117 | height_in_blocks = height_in_iMCUs * v_samp_factor; |
| 1118 | coef_arrays[ci] = (*srcinfo->mem->request_virt_barray) |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 1119 | ((j_common_ptr) srcinfo, JPOOL_IMAGE, FALSE, |
| 1120 | width_in_blocks, height_in_blocks, (JDIMENSION) v_samp_factor); |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1121 | } |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 1122 | info->workspace_coef_arrays = coef_arrays; |
| 1123 | } else |
| 1124 | info->workspace_coef_arrays = NULL; |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1125 | |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 1126 | return TRUE; |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 1127 | } |
| 1128 | |
| 1129 | |
| 1130 | /* Transpose destination image parameters */ |
| 1131 | |
| 1132 | LOCAL(void) |
| 1133 | transpose_critical_parameters (j_compress_ptr dstinfo) |
| 1134 | { |
| 1135 | int tblno, i, j, ci, itemp; |
| 1136 | jpeg_component_info *compptr; |
| 1137 | JQUANT_TBL *qtblptr; |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 1138 | JDIMENSION jtemp; |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 1139 | UINT16 qtemp; |
| 1140 | |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 1141 | /* Transpose image dimensions */ |
| 1142 | jtemp = dstinfo->image_width; |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 1143 | dstinfo->image_width = dstinfo->image_height; |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 1144 | dstinfo->image_height = jtemp; |
DRC | 36a6eec | 2010-10-08 08:05:44 +0000 | [diff] [blame] | 1145 | #if JPEG_LIB_VERSION >= 70 |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 1146 | itemp = dstinfo->min_DCT_h_scaled_size; |
| 1147 | dstinfo->min_DCT_h_scaled_size = dstinfo->min_DCT_v_scaled_size; |
| 1148 | dstinfo->min_DCT_v_scaled_size = itemp; |
DRC | 36a6eec | 2010-10-08 08:05:44 +0000 | [diff] [blame] | 1149 | #endif |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 1150 | |
| 1151 | /* Transpose sampling factors */ |
| 1152 | for (ci = 0; ci < dstinfo->num_components; ci++) { |
| 1153 | compptr = dstinfo->comp_info + ci; |
| 1154 | itemp = compptr->h_samp_factor; |
| 1155 | compptr->h_samp_factor = compptr->v_samp_factor; |
| 1156 | compptr->v_samp_factor = itemp; |
| 1157 | } |
| 1158 | |
| 1159 | /* Transpose quantization tables */ |
| 1160 | for (tblno = 0; tblno < NUM_QUANT_TBLS; tblno++) { |
| 1161 | qtblptr = dstinfo->quant_tbl_ptrs[tblno]; |
| 1162 | if (qtblptr != NULL) { |
| 1163 | for (i = 0; i < DCTSIZE; i++) { |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 1164 | for (j = 0; j < i; j++) { |
| 1165 | qtemp = qtblptr->quantval[i*DCTSIZE+j]; |
| 1166 | qtblptr->quantval[i*DCTSIZE+j] = qtblptr->quantval[j*DCTSIZE+i]; |
| 1167 | qtblptr->quantval[j*DCTSIZE+i] = qtemp; |
| 1168 | } |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 1169 | } |
| 1170 | } |
| 1171 | } |
| 1172 | } |
| 1173 | |
| 1174 | |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1175 | /* Adjust Exif image parameters. |
| 1176 | * |
| 1177 | * We try to adjust the Tags ExifImageWidth and ExifImageHeight if possible. |
| 1178 | */ |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 1179 | |
| 1180 | LOCAL(void) |
Alex Naidis | 6eb7d37 | 2016-10-16 23:10:08 +0200 | [diff] [blame] | 1181 | adjust_exif_parameters (JOCTET *data, unsigned int length, |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 1182 | JDIMENSION new_width, JDIMENSION new_height) |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 1183 | { |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1184 | boolean is_motorola; /* Flag for byte order */ |
| 1185 | unsigned int number_of_tags, tagnum; |
| 1186 | unsigned int firstoffset, offset; |
| 1187 | JDIMENSION new_value; |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 1188 | |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1189 | if (length < 12) return; /* Length of an IFD entry */ |
| 1190 | |
| 1191 | /* Discover byte order */ |
| 1192 | if (GETJOCTET(data[0]) == 0x49 && GETJOCTET(data[1]) == 0x49) |
| 1193 | is_motorola = FALSE; |
| 1194 | else if (GETJOCTET(data[0]) == 0x4D && GETJOCTET(data[1]) == 0x4D) |
| 1195 | is_motorola = TRUE; |
| 1196 | else |
| 1197 | return; |
| 1198 | |
| 1199 | /* Check Tag Mark */ |
| 1200 | if (is_motorola) { |
| 1201 | if (GETJOCTET(data[2]) != 0) return; |
| 1202 | if (GETJOCTET(data[3]) != 0x2A) return; |
| 1203 | } else { |
| 1204 | if (GETJOCTET(data[3]) != 0) return; |
| 1205 | if (GETJOCTET(data[2]) != 0x2A) return; |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 1206 | } |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 1207 | |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1208 | /* Get first IFD offset (offset to IFD0) */ |
| 1209 | if (is_motorola) { |
| 1210 | if (GETJOCTET(data[4]) != 0) return; |
| 1211 | if (GETJOCTET(data[5]) != 0) return; |
| 1212 | firstoffset = GETJOCTET(data[6]); |
| 1213 | firstoffset <<= 8; |
| 1214 | firstoffset += GETJOCTET(data[7]); |
| 1215 | } else { |
| 1216 | if (GETJOCTET(data[7]) != 0) return; |
| 1217 | if (GETJOCTET(data[6]) != 0) return; |
| 1218 | firstoffset = GETJOCTET(data[5]); |
| 1219 | firstoffset <<= 8; |
| 1220 | firstoffset += GETJOCTET(data[4]); |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 1221 | } |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1222 | if (firstoffset > length - 2) return; /* check end of data segment */ |
| 1223 | |
| 1224 | /* Get the number of directory entries contained in this IFD */ |
| 1225 | if (is_motorola) { |
| 1226 | number_of_tags = GETJOCTET(data[firstoffset]); |
| 1227 | number_of_tags <<= 8; |
| 1228 | number_of_tags += GETJOCTET(data[firstoffset+1]); |
| 1229 | } else { |
| 1230 | number_of_tags = GETJOCTET(data[firstoffset+1]); |
| 1231 | number_of_tags <<= 8; |
| 1232 | number_of_tags += GETJOCTET(data[firstoffset]); |
| 1233 | } |
| 1234 | if (number_of_tags == 0) return; |
| 1235 | firstoffset += 2; |
| 1236 | |
| 1237 | /* Search for ExifSubIFD offset Tag in IFD0 */ |
| 1238 | for (;;) { |
| 1239 | if (firstoffset > length - 12) return; /* check end of data segment */ |
| 1240 | /* Get Tag number */ |
| 1241 | if (is_motorola) { |
| 1242 | tagnum = GETJOCTET(data[firstoffset]); |
| 1243 | tagnum <<= 8; |
| 1244 | tagnum += GETJOCTET(data[firstoffset+1]); |
| 1245 | } else { |
| 1246 | tagnum = GETJOCTET(data[firstoffset+1]); |
| 1247 | tagnum <<= 8; |
| 1248 | tagnum += GETJOCTET(data[firstoffset]); |
| 1249 | } |
| 1250 | if (tagnum == 0x8769) break; /* found ExifSubIFD offset Tag */ |
| 1251 | if (--number_of_tags == 0) return; |
| 1252 | firstoffset += 12; |
| 1253 | } |
| 1254 | |
| 1255 | /* Get the ExifSubIFD offset */ |
| 1256 | if (is_motorola) { |
| 1257 | if (GETJOCTET(data[firstoffset+8]) != 0) return; |
| 1258 | if (GETJOCTET(data[firstoffset+9]) != 0) return; |
| 1259 | offset = GETJOCTET(data[firstoffset+10]); |
| 1260 | offset <<= 8; |
| 1261 | offset += GETJOCTET(data[firstoffset+11]); |
| 1262 | } else { |
| 1263 | if (GETJOCTET(data[firstoffset+11]) != 0) return; |
| 1264 | if (GETJOCTET(data[firstoffset+10]) != 0) return; |
| 1265 | offset = GETJOCTET(data[firstoffset+9]); |
| 1266 | offset <<= 8; |
| 1267 | offset += GETJOCTET(data[firstoffset+8]); |
| 1268 | } |
| 1269 | if (offset > length - 2) return; /* check end of data segment */ |
| 1270 | |
| 1271 | /* Get the number of directory entries contained in this SubIFD */ |
| 1272 | if (is_motorola) { |
| 1273 | number_of_tags = GETJOCTET(data[offset]); |
| 1274 | number_of_tags <<= 8; |
| 1275 | number_of_tags += GETJOCTET(data[offset+1]); |
| 1276 | } else { |
| 1277 | number_of_tags = GETJOCTET(data[offset+1]); |
| 1278 | number_of_tags <<= 8; |
| 1279 | number_of_tags += GETJOCTET(data[offset]); |
| 1280 | } |
| 1281 | if (number_of_tags < 2) return; |
| 1282 | offset += 2; |
| 1283 | |
| 1284 | /* Search for ExifImageWidth and ExifImageHeight Tags in this SubIFD */ |
| 1285 | do { |
| 1286 | if (offset > length - 12) return; /* check end of data segment */ |
| 1287 | /* Get Tag number */ |
| 1288 | if (is_motorola) { |
| 1289 | tagnum = GETJOCTET(data[offset]); |
| 1290 | tagnum <<= 8; |
| 1291 | tagnum += GETJOCTET(data[offset+1]); |
| 1292 | } else { |
| 1293 | tagnum = GETJOCTET(data[offset+1]); |
| 1294 | tagnum <<= 8; |
| 1295 | tagnum += GETJOCTET(data[offset]); |
| 1296 | } |
| 1297 | if (tagnum == 0xA002 || tagnum == 0xA003) { |
| 1298 | if (tagnum == 0xA002) |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 1299 | new_value = new_width; /* ExifImageWidth Tag */ |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1300 | else |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 1301 | new_value = new_height; /* ExifImageHeight Tag */ |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1302 | if (is_motorola) { |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 1303 | data[offset+2] = 0; /* Format = unsigned long (4 octets) */ |
| 1304 | data[offset+3] = 4; |
| 1305 | data[offset+4] = 0; /* Number Of Components = 1 */ |
| 1306 | data[offset+5] = 0; |
| 1307 | data[offset+6] = 0; |
| 1308 | data[offset+7] = 1; |
| 1309 | data[offset+8] = 0; |
| 1310 | data[offset+9] = 0; |
| 1311 | data[offset+10] = (JOCTET)((new_value >> 8) & 0xFF); |
| 1312 | data[offset+11] = (JOCTET)(new_value & 0xFF); |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1313 | } else { |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 1314 | data[offset+2] = 4; /* Format = unsigned long (4 octets) */ |
| 1315 | data[offset+3] = 0; |
| 1316 | data[offset+4] = 1; /* Number Of Components = 1 */ |
| 1317 | data[offset+5] = 0; |
| 1318 | data[offset+6] = 0; |
| 1319 | data[offset+7] = 0; |
| 1320 | data[offset+8] = (JOCTET)(new_value & 0xFF); |
| 1321 | data[offset+9] = (JOCTET)((new_value >> 8) & 0xFF); |
| 1322 | data[offset+10] = 0; |
| 1323 | data[offset+11] = 0; |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1324 | } |
| 1325 | } |
| 1326 | offset += 12; |
| 1327 | } while (--number_of_tags); |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 1328 | } |
| 1329 | |
| 1330 | |
| 1331 | /* Adjust output image parameters as needed. |
| 1332 | * |
| 1333 | * This must be called after jpeg_copy_critical_parameters() |
| 1334 | * and before jpeg_write_coefficients(). |
| 1335 | * |
| 1336 | * The return value is the set of virtual coefficient arrays to be written |
| 1337 | * (either the ones allocated by jtransform_request_workspace, or the |
| 1338 | * original source data arrays). The caller will need to pass this value |
| 1339 | * to jpeg_write_coefficients(). |
| 1340 | */ |
| 1341 | |
| 1342 | GLOBAL(jvirt_barray_ptr *) |
| 1343 | jtransform_adjust_parameters (j_decompress_ptr srcinfo, |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 1344 | j_compress_ptr dstinfo, |
| 1345 | jvirt_barray_ptr *src_coef_arrays, |
| 1346 | jpeg_transform_info *info) |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 1347 | { |
| 1348 | /* If force-to-grayscale is requested, adjust destination parameters */ |
| 1349 | if (info->force_grayscale) { |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1350 | /* First, ensure we have YCbCr or grayscale data, and that the source's |
| 1351 | * Y channel is full resolution. (No reasonable person would make Y |
| 1352 | * be less than full resolution, so actually coping with that case |
| 1353 | * isn't worth extra code space. But we check it to avoid crashing.) |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 1354 | */ |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1355 | if (((dstinfo->jpeg_color_space == JCS_YCbCr && |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 1356 | dstinfo->num_components == 3) || |
| 1357 | (dstinfo->jpeg_color_space == JCS_GRAYSCALE && |
| 1358 | dstinfo->num_components == 1)) && |
| 1359 | srcinfo->comp_info[0].h_samp_factor == srcinfo->max_h_samp_factor && |
| 1360 | srcinfo->comp_info[0].v_samp_factor == srcinfo->max_v_samp_factor) { |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1361 | /* We use jpeg_set_colorspace to make sure subsidiary settings get fixed |
| 1362 | * properly. Among other things, it sets the target h_samp_factor & |
| 1363 | * v_samp_factor to 1, which typically won't match the source. |
| 1364 | * We have to preserve the source's quantization table number, however. |
| 1365 | */ |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 1366 | int sv_quant_tbl_no = dstinfo->comp_info[0].quant_tbl_no; |
| 1367 | jpeg_set_colorspace(dstinfo, JCS_GRAYSCALE); |
| 1368 | dstinfo->comp_info[0].quant_tbl_no = sv_quant_tbl_no; |
| 1369 | } else { |
| 1370 | /* Sorry, can't do it */ |
| 1371 | ERREXIT(dstinfo, JERR_CONVERSION_NOTIMPL); |
| 1372 | } |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1373 | } else if (info->num_components == 1) { |
| 1374 | /* For a single-component source, we force the destination sampling factors |
| 1375 | * to 1x1, with or without force_grayscale. This is useful because some |
| 1376 | * decoders choke on grayscale images with other sampling factors. |
| 1377 | */ |
| 1378 | dstinfo->comp_info[0].h_samp_factor = 1; |
| 1379 | dstinfo->comp_info[0].v_samp_factor = 1; |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 1380 | } |
| 1381 | |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1382 | /* Correct the destination's image dimensions as necessary |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 1383 | * for rotate/flip, resize, and crop operations. |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1384 | */ |
Leon Scroggins III | bd7903e | 2018-02-28 14:05:04 -0500 | [diff] [blame] | 1385 | #if JPEG_LIB_VERSION >= 80 |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 1386 | dstinfo->jpeg_width = info->output_width; |
| 1387 | dstinfo->jpeg_height = info->output_height; |
DRC | c04bd3c | 2010-10-10 02:15:56 +0000 | [diff] [blame] | 1388 | #endif |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1389 | |
| 1390 | /* Transpose destination image parameters */ |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 1391 | switch (info->transform) { |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 1392 | case JXFORM_TRANSPOSE: |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 1393 | case JXFORM_TRANSVERSE: |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 1394 | case JXFORM_ROT_90: |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 1395 | case JXFORM_ROT_270: |
Leon Scroggins III | bd7903e | 2018-02-28 14:05:04 -0500 | [diff] [blame] | 1396 | #if JPEG_LIB_VERSION < 80 |
DRC | 9a648cc | 2010-10-10 02:48:21 +0000 | [diff] [blame] | 1397 | dstinfo->image_width = info->output_height; |
| 1398 | dstinfo->image_height = info->output_width; |
| 1399 | #endif |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 1400 | transpose_critical_parameters(dstinfo); |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 1401 | break; |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1402 | default: |
Leon Scroggins III | bd7903e | 2018-02-28 14:05:04 -0500 | [diff] [blame] | 1403 | #if JPEG_LIB_VERSION < 80 |
DRC | 9a648cc | 2010-10-10 02:48:21 +0000 | [diff] [blame] | 1404 | dstinfo->image_width = info->output_width; |
| 1405 | dstinfo->image_height = info->output_height; |
| 1406 | #endif |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1407 | break; |
| 1408 | } |
| 1409 | |
| 1410 | /* Adjust Exif properties */ |
| 1411 | if (srcinfo->marker_list != NULL && |
| 1412 | srcinfo->marker_list->marker == JPEG_APP0+1 && |
| 1413 | srcinfo->marker_list->data_length >= 6 && |
| 1414 | GETJOCTET(srcinfo->marker_list->data[0]) == 0x45 && |
| 1415 | GETJOCTET(srcinfo->marker_list->data[1]) == 0x78 && |
| 1416 | GETJOCTET(srcinfo->marker_list->data[2]) == 0x69 && |
| 1417 | GETJOCTET(srcinfo->marker_list->data[3]) == 0x66 && |
| 1418 | GETJOCTET(srcinfo->marker_list->data[4]) == 0 && |
| 1419 | GETJOCTET(srcinfo->marker_list->data[5]) == 0) { |
| 1420 | /* Suppress output of JFIF marker */ |
| 1421 | dstinfo->write_JFIF_header = FALSE; |
| 1422 | /* Adjust Exif image parameters */ |
Leon Scroggins III | bd7903e | 2018-02-28 14:05:04 -0500 | [diff] [blame] | 1423 | #if JPEG_LIB_VERSION >= 80 |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 1424 | if (dstinfo->jpeg_width != srcinfo->image_width || |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 1425 | dstinfo->jpeg_height != srcinfo->image_height) |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1426 | /* Align data segment to start of TIFF structure for parsing */ |
| 1427 | adjust_exif_parameters(srcinfo->marker_list->data + 6, |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 1428 | srcinfo->marker_list->data_length - 6, |
| 1429 | dstinfo->jpeg_width, dstinfo->jpeg_height); |
Leon Scroggins III | bd7903e | 2018-02-28 14:05:04 -0500 | [diff] [blame] | 1430 | #else |
| 1431 | if (dstinfo->image_width != srcinfo->image_width || |
| 1432 | dstinfo->image_height != srcinfo->image_height) |
| 1433 | /* Align data segment to start of TIFF structure for parsing */ |
| 1434 | adjust_exif_parameters(srcinfo->marker_list->data + 6, |
| 1435 | srcinfo->marker_list->data_length - 6, |
| 1436 | dstinfo->image_width, dstinfo->image_height); |
DRC | c04bd3c | 2010-10-10 02:15:56 +0000 | [diff] [blame] | 1437 | #endif |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 1438 | } |
| 1439 | |
| 1440 | /* Return the appropriate output data set */ |
| 1441 | if (info->workspace_coef_arrays != NULL) |
| 1442 | return info->workspace_coef_arrays; |
| 1443 | return src_coef_arrays; |
| 1444 | } |
| 1445 | |
| 1446 | |
| 1447 | /* Execute the actual transformation, if any. |
| 1448 | * |
| 1449 | * This must be called *after* jpeg_write_coefficients, because it depends |
| 1450 | * on jpeg_write_coefficients to have computed subsidiary values such as |
| 1451 | * the per-component width and height fields in the destination object. |
| 1452 | * |
| 1453 | * Note that some transformations will modify the source data arrays! |
| 1454 | */ |
| 1455 | |
| 1456 | GLOBAL(void) |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1457 | jtransform_execute_transform (j_decompress_ptr srcinfo, |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 1458 | j_compress_ptr dstinfo, |
| 1459 | jvirt_barray_ptr *src_coef_arrays, |
| 1460 | jpeg_transform_info *info) |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 1461 | { |
| 1462 | jvirt_barray_ptr *dst_coef_arrays = info->workspace_coef_arrays; |
| 1463 | |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1464 | /* Note: conditions tested here should match those in switch statement |
| 1465 | * in jtransform_request_workspace() |
| 1466 | */ |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 1467 | switch (info->transform) { |
| 1468 | case JXFORM_NONE: |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1469 | if (info->x_crop_offset != 0 || info->y_crop_offset != 0) |
| 1470 | do_crop(srcinfo, dstinfo, info->x_crop_offset, info->y_crop_offset, |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 1471 | src_coef_arrays, dst_coef_arrays); |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 1472 | break; |
| 1473 | case JXFORM_FLIP_H: |
DRC | ba5ea51 | 2011-03-04 03:20:34 +0000 | [diff] [blame] | 1474 | if (info->y_crop_offset != 0 || info->slow_hflip) |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1475 | do_flip_h(srcinfo, dstinfo, info->x_crop_offset, info->y_crop_offset, |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 1476 | src_coef_arrays, dst_coef_arrays); |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1477 | else |
| 1478 | do_flip_h_no_crop(srcinfo, dstinfo, info->x_crop_offset, |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 1479 | src_coef_arrays); |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 1480 | break; |
| 1481 | case JXFORM_FLIP_V: |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1482 | do_flip_v(srcinfo, dstinfo, info->x_crop_offset, info->y_crop_offset, |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 1483 | src_coef_arrays, dst_coef_arrays); |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 1484 | break; |
| 1485 | case JXFORM_TRANSPOSE: |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1486 | do_transpose(srcinfo, dstinfo, info->x_crop_offset, info->y_crop_offset, |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 1487 | src_coef_arrays, dst_coef_arrays); |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 1488 | break; |
| 1489 | case JXFORM_TRANSVERSE: |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1490 | do_transverse(srcinfo, dstinfo, info->x_crop_offset, info->y_crop_offset, |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 1491 | src_coef_arrays, dst_coef_arrays); |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 1492 | break; |
| 1493 | case JXFORM_ROT_90: |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1494 | do_rot_90(srcinfo, dstinfo, info->x_crop_offset, info->y_crop_offset, |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 1495 | src_coef_arrays, dst_coef_arrays); |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 1496 | break; |
| 1497 | case JXFORM_ROT_180: |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1498 | do_rot_180(srcinfo, dstinfo, info->x_crop_offset, info->y_crop_offset, |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 1499 | src_coef_arrays, dst_coef_arrays); |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 1500 | break; |
| 1501 | case JXFORM_ROT_270: |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1502 | do_rot_270(srcinfo, dstinfo, info->x_crop_offset, info->y_crop_offset, |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 1503 | src_coef_arrays, dst_coef_arrays); |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 1504 | break; |
| 1505 | } |
| 1506 | } |
| 1507 | |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1508 | /* jtransform_perfect_transform |
| 1509 | * |
| 1510 | * Determine whether lossless transformation is perfectly |
| 1511 | * possible for a specified image and transformation. |
| 1512 | * |
| 1513 | * Inputs: |
| 1514 | * image_width, image_height: source image dimensions. |
| 1515 | * MCU_width, MCU_height: pixel dimensions of MCU. |
| 1516 | * transform: transformation identifier. |
| 1517 | * Parameter sources from initialized jpeg_struct |
| 1518 | * (after reading source header): |
| 1519 | * image_width = cinfo.image_width |
| 1520 | * image_height = cinfo.image_height |
Guido Vollbeding | 989630f | 2010-01-10 00:00:00 +0000 | [diff] [blame] | 1521 | * MCU_width = cinfo.max_h_samp_factor * cinfo.block_size |
| 1522 | * MCU_height = cinfo.max_v_samp_factor * cinfo.block_size |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1523 | * Result: |
| 1524 | * TRUE = perfect transformation possible |
| 1525 | * FALSE = perfect transformation not possible |
| 1526 | * (may use custom action then) |
| 1527 | */ |
| 1528 | |
| 1529 | GLOBAL(boolean) |
| 1530 | jtransform_perfect_transform(JDIMENSION image_width, JDIMENSION image_height, |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 1531 | int MCU_width, int MCU_height, |
| 1532 | JXFORM_CODE transform) |
Guido Vollbeding | 5996a25 | 2009-06-27 00:00:00 +0000 | [diff] [blame] | 1533 | { |
| 1534 | boolean result = TRUE; /* initialize TRUE */ |
| 1535 | |
| 1536 | switch (transform) { |
| 1537 | case JXFORM_FLIP_H: |
| 1538 | case JXFORM_ROT_270: |
| 1539 | if (image_width % (JDIMENSION) MCU_width) |
| 1540 | result = FALSE; |
| 1541 | break; |
| 1542 | case JXFORM_FLIP_V: |
| 1543 | case JXFORM_ROT_90: |
| 1544 | if (image_height % (JDIMENSION) MCU_height) |
| 1545 | result = FALSE; |
| 1546 | break; |
| 1547 | case JXFORM_TRANSVERSE: |
| 1548 | case JXFORM_ROT_180: |
| 1549 | if (image_width % (JDIMENSION) MCU_width) |
| 1550 | result = FALSE; |
| 1551 | if (image_height % (JDIMENSION) MCU_height) |
| 1552 | result = FALSE; |
| 1553 | break; |
| 1554 | default: |
| 1555 | break; |
| 1556 | } |
| 1557 | |
| 1558 | return result; |
| 1559 | } |
| 1560 | |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 1561 | #endif /* TRANSFORMS_SUPPORTED */ |
| 1562 | |
| 1563 | |
| 1564 | /* Setup decompression object to save desired markers in memory. |
| 1565 | * This must be called before jpeg_read_header() to have the desired effect. |
| 1566 | */ |
| 1567 | |
| 1568 | GLOBAL(void) |
| 1569 | jcopy_markers_setup (j_decompress_ptr srcinfo, JCOPY_OPTION option) |
| 1570 | { |
| 1571 | #ifdef SAVE_MARKERS_SUPPORTED |
| 1572 | int m; |
| 1573 | |
| 1574 | /* Save comments except under NONE option */ |
| 1575 | if (option != JCOPYOPT_NONE) { |
| 1576 | jpeg_save_markers(srcinfo, JPEG_COM, 0xFFFF); |
| 1577 | } |
| 1578 | /* Save all types of APPn markers iff ALL option */ |
| 1579 | if (option == JCOPYOPT_ALL) { |
| 1580 | for (m = 0; m < 16; m++) |
| 1581 | jpeg_save_markers(srcinfo, JPEG_APP0 + m, 0xFFFF); |
| 1582 | } |
| 1583 | #endif /* SAVE_MARKERS_SUPPORTED */ |
| 1584 | } |
| 1585 | |
| 1586 | /* Copy markers saved in the given source object to the destination object. |
| 1587 | * This should be called just after jpeg_start_compress() or |
| 1588 | * jpeg_write_coefficients(). |
| 1589 | * Note that those routines will have written the SOI, and also the |
| 1590 | * JFIF APP0 or Adobe APP14 markers if selected. |
| 1591 | */ |
| 1592 | |
| 1593 | GLOBAL(void) |
| 1594 | jcopy_markers_execute (j_decompress_ptr srcinfo, j_compress_ptr dstinfo, |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 1595 | JCOPY_OPTION option) |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 1596 | { |
| 1597 | jpeg_saved_marker_ptr marker; |
| 1598 | |
| 1599 | /* In the current implementation, we don't actually need to examine the |
| 1600 | * option flag here; we just copy everything that got saved. |
| 1601 | * But to avoid confusion, we do not output JFIF and Adobe APP14 markers |
| 1602 | * if the encoder library already wrote one. |
| 1603 | */ |
| 1604 | for (marker = srcinfo->marker_list; marker != NULL; marker = marker->next) { |
| 1605 | if (dstinfo->write_JFIF_header && |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 1606 | marker->marker == JPEG_APP0 && |
| 1607 | marker->data_length >= 5 && |
| 1608 | GETJOCTET(marker->data[0]) == 0x4A && |
| 1609 | GETJOCTET(marker->data[1]) == 0x46 && |
| 1610 | GETJOCTET(marker->data[2]) == 0x49 && |
| 1611 | GETJOCTET(marker->data[3]) == 0x46 && |
| 1612 | GETJOCTET(marker->data[4]) == 0) |
| 1613 | continue; /* reject duplicate JFIF */ |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 1614 | if (dstinfo->write_Adobe_marker && |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 1615 | marker->marker == JPEG_APP0+14 && |
| 1616 | marker->data_length >= 5 && |
| 1617 | GETJOCTET(marker->data[0]) == 0x41 && |
| 1618 | GETJOCTET(marker->data[1]) == 0x64 && |
| 1619 | GETJOCTET(marker->data[2]) == 0x6F && |
| 1620 | GETJOCTET(marker->data[3]) == 0x62 && |
| 1621 | GETJOCTET(marker->data[4]) == 0x65) |
| 1622 | continue; /* reject duplicate Adobe */ |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 1623 | jpeg_write_marker(dstinfo, marker->marker, |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 1624 | marker->data, marker->data_length); |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 1625 | } |
| 1626 | } |