Line data Source code
1 : /*
2 : * Copyright (c) 1991-1997 Sam Leffler
3 : * Copyright (c) 1991-1997 Silicon Graphics, Inc.
4 : *
5 : * Permission to use, copy, modify, distribute, and sell this software and
6 : * its documentation for any purpose is hereby granted without fee, provided
7 : * that (i) the above copyright notices and this permission notice appear in
8 : * all copies of the software and related documentation, and (ii) the names of
9 : * Sam Leffler and Silicon Graphics may not be used in any advertising or
10 : * publicity relating to the software without the specific, prior written
11 : * permission of Sam Leffler and Silicon Graphics.
12 : *
13 : * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
14 : * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
15 : * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
16 : *
17 : * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
18 : * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
19 : * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
20 : * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
21 : * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
22 : * OF THIS SOFTWARE.
23 : */
24 :
25 : /*
26 : * TIFF Library.
27 : *
28 : * Strip-organized Image Support Routines.
29 : */
30 : #include "tiffiop.h"
31 :
32 : /*
33 : * Compute which strip a (row,sample) value is in.
34 : */
35 55 : uint32_t TIFFComputeStrip(TIFF *tif, uint32_t row, uint16_t sample)
36 : {
37 : static const char module[] = "TIFFComputeStrip";
38 55 : TIFFDirectory *td = &tif->tif_dir;
39 : uint32_t strip;
40 :
41 55 : if (td->td_rowsperstrip == 0)
42 : {
43 0 : TIFFErrorExtR(tif, module,
44 : "Cannot compute strip: RowsPerStrip is zero");
45 0 : return 0;
46 : }
47 55 : strip = row / td->td_rowsperstrip;
48 55 : if (td->td_planarconfig == PLANARCONFIG_SEPARATE)
49 : {
50 4 : if (sample >= td->td_samplesperpixel)
51 : {
52 0 : TIFFErrorExtR(tif, module, "%lu: Sample out of range, max %lu",
53 : (unsigned long)sample,
54 0 : (unsigned long)td->td_samplesperpixel);
55 0 : return (0);
56 : }
57 4 : strip += (uint32_t)sample * td->td_stripsperimage;
58 : }
59 55 : return (strip);
60 : }
61 :
62 : /*
63 : * Compute how many strips are in an image.
64 : */
65 169972 : uint32_t TIFFNumberOfStrips(TIFF *tif)
66 : {
67 169972 : TIFFDirectory *td = &tif->tif_dir;
68 : uint32_t nstrips;
69 :
70 169972 : if (td->td_rowsperstrip == 0)
71 : {
72 0 : TIFFWarningExtR(tif, "TIFFNumberOfStrips", "RowsPerStrip is zero");
73 0 : return 0;
74 : }
75 339944 : nstrips = (td->td_rowsperstrip == (uint32_t)-1
76 : ? 1
77 169972 : : TIFFhowmany_32(td->td_imagelength, td->td_rowsperstrip));
78 169972 : if (td->td_planarconfig == PLANARCONFIG_SEPARATE)
79 : nstrips =
80 13608 : _TIFFMultiply32(tif, nstrips, (uint32_t)td->td_samplesperpixel,
81 : "TIFFNumberOfStrips");
82 169627 : return (nstrips);
83 : }
84 :
85 : /*
86 : * Compute the # bytes in a variable height, row-aligned strip.
87 : */
88 4712020 : uint64_t TIFFVStripSize64(TIFF *tif, uint32_t nrows)
89 : {
90 : static const char module[] = "TIFFVStripSize64";
91 4712020 : TIFFDirectory *td = &tif->tif_dir;
92 4712020 : if (nrows == (uint32_t)(-1))
93 0 : nrows = td->td_imagelength;
94 4712020 : if ((td->td_planarconfig == PLANARCONFIG_CONTIG) &&
95 4628130 : (td->td_photometric == PHOTOMETRIC_YCBCR) && (!isUpSampled(tif)))
96 : {
97 : /*
98 : * Packed YCbCr data contain one Cb+Cr for every
99 : * HorizontalSampling*VerticalSampling Y values.
100 : * Must also roundup width and height when calculating
101 : * since images that are not a multiple of the
102 : * horizontal/vertical subsampling area include
103 : * YCbCr data for the extended image.
104 : */
105 : uint16_t ycbcrsubsampling[2];
106 : uint16_t samplingblock_samples;
107 : uint32_t samplingblocks_hor;
108 : uint32_t samplingblocks_ver;
109 : uint64_t samplingrow_samples;
110 : uint64_t samplingrow_size;
111 976 : if (td->td_samplesperpixel != 3)
112 : {
113 0 : TIFFErrorExtR(tif, module, "Invalid td_samplesperpixel value");
114 0 : return 0;
115 : }
116 976 : TIFFGetFieldDefaulted(tif, TIFFTAG_YCBCRSUBSAMPLING,
117 : ycbcrsubsampling + 0, ycbcrsubsampling + 1);
118 976 : if ((ycbcrsubsampling[0] != 1 && ycbcrsubsampling[0] != 2 &&
119 15 : ycbcrsubsampling[0] != 4) ||
120 976 : (ycbcrsubsampling[1] != 1 && ycbcrsubsampling[1] != 2 &&
121 8 : ycbcrsubsampling[1] != 4) ||
122 976 : (ycbcrsubsampling[0] == 0 || ycbcrsubsampling[1] == 0))
123 : {
124 0 : TIFFErrorExtR(tif, module, "Invalid YCbCr subsampling (%dx%d)",
125 0 : ycbcrsubsampling[0], ycbcrsubsampling[1]);
126 0 : return 0;
127 : }
128 976 : samplingblock_samples = ycbcrsubsampling[0] * ycbcrsubsampling[1] + 2;
129 976 : samplingblocks_hor =
130 976 : TIFFhowmany_32(td->td_imagewidth, ycbcrsubsampling[0]);
131 976 : samplingblocks_ver = TIFFhowmany_32(nrows, ycbcrsubsampling[1]);
132 976 : samplingrow_samples = _TIFFMultiply64(tif, samplingblocks_hor,
133 : samplingblock_samples, module);
134 976 : samplingrow_size = TIFFhowmany8_64(_TIFFMultiply64(
135 : tif, samplingrow_samples, td->td_bitspersample, module));
136 : return (
137 976 : _TIFFMultiply64(tif, samplingrow_size, samplingblocks_ver, module));
138 : }
139 : else
140 4711040 : return (_TIFFMultiply64(tif, nrows, TIFFScanlineSize64(tif), module));
141 : }
142 2095470 : tmsize_t TIFFVStripSize(TIFF *tif, uint32_t nrows)
143 : {
144 : static const char module[] = "TIFFVStripSize";
145 : uint64_t m;
146 2095470 : m = TIFFVStripSize64(tif, nrows);
147 2095460 : return _TIFFCastUInt64ToSSize(tif, m, module);
148 : }
149 :
150 : /*
151 : * Compute the # bytes in a raw strip.
152 : */
153 0 : uint64_t TIFFRawStripSize64(TIFF *tif, uint32_t strip)
154 : {
155 : static const char module[] = "TIFFRawStripSize64";
156 0 : uint64_t bytecount = TIFFGetStrileByteCount(tif, strip);
157 :
158 0 : if (bytecount == 0)
159 : {
160 0 : TIFFErrorExtR(tif, module,
161 : "%" PRIu64 ": Invalid strip byte count, strip %lu",
162 : (uint64_t)bytecount, (unsigned long)strip);
163 0 : bytecount = (uint64_t)-1;
164 : }
165 :
166 0 : return bytecount;
167 : }
168 0 : tmsize_t TIFFRawStripSize(TIFF *tif, uint32_t strip)
169 : {
170 : static const char module[] = "TIFFRawStripSize";
171 : uint64_t m;
172 : tmsize_t n;
173 0 : m = TIFFRawStripSize64(tif, strip);
174 0 : if (m == (uint64_t)(-1))
175 0 : n = (tmsize_t)(-1);
176 : else
177 : {
178 0 : n = (tmsize_t)m;
179 0 : if ((uint64_t)n != m)
180 : {
181 0 : TIFFErrorExtR(tif, module, "Integer overflow");
182 0 : n = 0;
183 : }
184 : }
185 0 : return (n);
186 : }
187 :
188 : /*
189 : * Compute the # bytes in a (row-aligned) strip.
190 : *
191 : * Note that if RowsPerStrip is larger than the
192 : * recorded ImageLength, then the strip size is
193 : * truncated to reflect the actual space required
194 : * to hold the strip.
195 : */
196 2608300 : uint64_t TIFFStripSize64(TIFF *tif)
197 : {
198 2608300 : TIFFDirectory *td = &tif->tif_dir;
199 2608300 : uint32_t rps = td->td_rowsperstrip;
200 2608300 : if (rps > td->td_imagelength)
201 110 : rps = td->td_imagelength;
202 2608300 : return (TIFFVStripSize64(tif, rps));
203 : }
204 2579180 : tmsize_t TIFFStripSize(TIFF *tif)
205 : {
206 : static const char module[] = "TIFFStripSize";
207 : uint64_t m;
208 2579180 : m = TIFFStripSize64(tif);
209 2578960 : return _TIFFCastUInt64ToSSize(tif, m, module);
210 : }
211 :
212 : /*
213 : * Compute a default strip size based on the image
214 : * characteristics and a requested value. If the
215 : * request is <1 then we choose a strip size according
216 : * to certain heuristics.
217 : */
218 6711 : uint32_t TIFFDefaultStripSize(TIFF *tif, uint32_t request)
219 : {
220 6711 : return (*tif->tif_defstripsize)(tif, request);
221 : }
222 :
223 6711 : uint32_t _TIFFDefaultStripSize(TIFF *tif, uint32_t s)
224 : {
225 6711 : if ((int32_t)s < 1)
226 : {
227 : /*
228 : * If RowsPerStrip is unspecified, try to break the
229 : * image up into strips that are approximately
230 : * STRIP_SIZE_DEFAULT bytes long.
231 : */
232 : uint64_t scanlinesize;
233 : uint64_t rows;
234 6711 : scanlinesize = TIFFScanlineSize64(tif);
235 6711 : if (scanlinesize == 0)
236 0 : scanlinesize = 1;
237 6711 : rows = (uint64_t)STRIP_SIZE_DEFAULT / scanlinesize;
238 6711 : if (rows == 0)
239 31 : rows = 1;
240 6680 : else if (rows > 0xFFFFFFFF)
241 0 : rows = 0xFFFFFFFF;
242 6711 : s = (uint32_t)rows;
243 : }
244 6711 : return (s);
245 : }
246 :
247 : /*
248 : * Return the number of bytes to read/write in a call to
249 : * one of the scanline-oriented i/o routines. Note that
250 : * this number may be 1/samples-per-pixel if data is
251 : * stored as separate planes.
252 : * The ScanlineSize in case of YCbCrSubsampling is defined as the
253 : * strip size divided by the strip height, i.e. the size of a pack of vertical
254 : * subsampling lines divided by vertical subsampling. It should thus make
255 : * sense when multiplied by a multiple of vertical subsampling.
256 : */
257 4885800 : uint64_t TIFFScanlineSize64(TIFF *tif)
258 : {
259 : static const char module[] = "TIFFScanlineSize64";
260 4885800 : TIFFDirectory *td = &tif->tif_dir;
261 : uint64_t scanline_size;
262 4885800 : if (td->td_planarconfig == PLANARCONFIG_CONTIG)
263 : {
264 4756330 : if ((td->td_photometric == PHOTOMETRIC_YCBCR) &&
265 14970 : (td->td_samplesperpixel == 3) && (!isUpSampled(tif)))
266 3291 : {
267 : uint16_t ycbcrsubsampling[2];
268 : uint16_t samplingblock_samples;
269 : uint32_t samplingblocks_hor;
270 : uint64_t samplingrow_samples;
271 : uint64_t samplingrow_size;
272 3291 : if (td->td_samplesperpixel != 3)
273 : {
274 0 : TIFFErrorExtR(tif, module, "Invalid td_samplesperpixel value");
275 0 : return 0;
276 : }
277 3291 : TIFFGetFieldDefaulted(tif, TIFFTAG_YCBCRSUBSAMPLING,
278 : ycbcrsubsampling + 0, ycbcrsubsampling + 1);
279 3291 : if (((ycbcrsubsampling[0] != 1) && (ycbcrsubsampling[0] != 2) &&
280 10 : (ycbcrsubsampling[0] != 4)) ||
281 3291 : ((ycbcrsubsampling[1] != 1) && (ycbcrsubsampling[1] != 2) &&
282 6 : (ycbcrsubsampling[1] != 4)) ||
283 3291 : ((ycbcrsubsampling[0] == 0) || (ycbcrsubsampling[1] == 0)))
284 : {
285 0 : TIFFErrorExtR(tif, module, "Invalid YCbCr subsampling");
286 0 : return 0;
287 : }
288 3291 : samplingblock_samples =
289 3291 : ycbcrsubsampling[0] * ycbcrsubsampling[1] + 2;
290 3291 : samplingblocks_hor =
291 3291 : TIFFhowmany_32(td->td_imagewidth, ycbcrsubsampling[0]);
292 3291 : samplingrow_samples = _TIFFMultiply64(
293 : tif, samplingblocks_hor, samplingblock_samples, module);
294 3291 : samplingrow_size =
295 3291 : TIFFhowmany_64(_TIFFMultiply64(tif, samplingrow_samples,
296 : td->td_bitspersample, module),
297 : 8);
298 3291 : scanline_size = (samplingrow_size / ycbcrsubsampling[1]);
299 : }
300 : else
301 : {
302 : uint64_t scanline_samples;
303 4753040 : uint32_t scanline_width = td->td_imagewidth;
304 :
305 : #if 0
306 : // Tries to fix https://gitlab.com/libtiff/libtiff/-/merge_requests/564
307 : // but causes regression when decoding legit files with tiffcp -c none
308 : // Cf https://gitlab.com/libtiff/libtiff/-/merge_requests/644
309 : if (td->td_photometric == PHOTOMETRIC_YCBCR)
310 : {
311 : uint16_t subsampling_hor;
312 : uint16_t ignored;
313 : TIFFGetFieldDefaulted(tif, TIFFTAG_YCBCRSUBSAMPLING,
314 : &subsampling_hor, &ignored);
315 : if (subsampling_hor > 1) // roundup width for YCbCr
316 : scanline_width =
317 : TIFFroundup_32(scanline_width, subsampling_hor);
318 : }
319 : #endif
320 :
321 4753040 : scanline_samples = _TIFFMultiply64(tif, scanline_width,
322 4753040 : td->td_samplesperpixel, module);
323 4752270 : scanline_size =
324 4752730 : TIFFhowmany_64(_TIFFMultiply64(tif, scanline_samples,
325 : td->td_bitspersample, module),
326 : 8);
327 : }
328 : }
329 : else
330 : {
331 129268 : scanline_size =
332 129463 : TIFFhowmany_64(_TIFFMultiply64(tif, td->td_imagewidth,
333 : td->td_bitspersample, module),
334 : 8);
335 : }
336 4884830 : if (scanline_size == 0)
337 : {
338 0 : TIFFErrorExtR(tif, module, "Computed scanline size is zero");
339 0 : return 0;
340 : }
341 4884830 : return (scanline_size);
342 : }
343 147349 : tmsize_t TIFFScanlineSize(TIFF *tif)
344 : {
345 : static const char module[] = "TIFFScanlineSize";
346 : uint64_t m;
347 147349 : m = TIFFScanlineSize64(tif);
348 147319 : return _TIFFCastUInt64ToSSize(tif, m, module);
349 : }
350 :
351 : /*
352 : * Return the number of bytes required to store a complete
353 : * decoded and packed raster scanline (as opposed to the
354 : * I/O size returned by TIFFScanlineSize which may be less
355 : * if data is store as separate planes).
356 : */
357 0 : uint64_t TIFFRasterScanlineSize64(TIFF *tif)
358 : {
359 : static const char module[] = "TIFFRasterScanlineSize64";
360 0 : TIFFDirectory *td = &tif->tif_dir;
361 : uint64_t scanline;
362 :
363 : scanline =
364 0 : _TIFFMultiply64(tif, td->td_bitspersample, td->td_imagewidth, module);
365 0 : if (td->td_planarconfig == PLANARCONFIG_CONTIG)
366 : {
367 : scanline =
368 0 : _TIFFMultiply64(tif, scanline, td->td_samplesperpixel, module);
369 0 : return (TIFFhowmany8_64(scanline));
370 : }
371 : else
372 0 : return (_TIFFMultiply64(tif, TIFFhowmany8_64(scanline),
373 0 : td->td_samplesperpixel, module));
374 : }
375 0 : tmsize_t TIFFRasterScanlineSize(TIFF *tif)
376 : {
377 : static const char module[] = "TIFFRasterScanlineSize";
378 : uint64_t m;
379 0 : m = TIFFRasterScanlineSize64(tif);
380 0 : return _TIFFCastUInt64ToSSize(tif, m, module);
381 : }
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