1
/* $Id: tif_tile.c,v 1.12.2.1 2010-06-08 18:50:43 bfriesen Exp $ */
4
* Copyright (c) 1991-1997 Sam Leffler
5
* Copyright (c) 1991-1997 Silicon Graphics, Inc.
7
* Permission to use, copy, modify, distribute, and sell this software and
8
* its documentation for any purpose is hereby granted without fee, provided
9
* that (i) the above copyright notices and this permission notice appear in
10
* all copies of the software and related documentation, and (ii) the names of
11
* Sam Leffler and Silicon Graphics may not be used in any advertising or
12
* publicity relating to the software without the specific, prior written
13
* permission of Sam Leffler and Silicon Graphics.
15
* THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
16
* EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
17
* WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
19
* IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
20
* ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
21
* OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
22
* WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
23
* LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
30
* Tiled Image Support Routines.
35
summarize(TIFF* tif, size_t summand1, size_t summand2, const char* where)
38
* XXX: We are using casting to uint32 here, because sizeof(size_t)
39
* may be larger than sizeof(uint32) on 64-bit architectures.
41
uint32 bytes = summand1 + summand2;
43
if (bytes - summand1 != summand2) {
44
TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "Integer overflow in %s", where);
52
multiply(TIFF* tif, size_t nmemb, size_t elem_size, const char* where)
54
uint32 bytes = nmemb * elem_size;
56
if (elem_size && bytes / elem_size != nmemb) {
57
TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "Integer overflow in %s", where);
65
* Compute which tile an (x,y,z,s) value is in.
68
TIFFComputeTile(TIFF* tif, uint32 x, uint32 y, uint32 z, tsample_t s)
70
TIFFDirectory *td = &tif->tif_dir;
71
uint32 dx = td->td_tilewidth;
72
uint32 dy = td->td_tilelength;
73
uint32 dz = td->td_tiledepth;
76
if (td->td_imagedepth == 1)
78
if (dx == (uint32) -1)
79
dx = td->td_imagewidth;
80
if (dy == (uint32) -1)
81
dy = td->td_imagelength;
82
if (dz == (uint32) -1)
83
dz = td->td_imagedepth;
84
if (dx != 0 && dy != 0 && dz != 0) {
85
uint32 xpt = TIFFhowmany(td->td_imagewidth, dx);
86
uint32 ypt = TIFFhowmany(td->td_imagelength, dy);
87
uint32 zpt = TIFFhowmany(td->td_imagedepth, dz);
89
if (td->td_planarconfig == PLANARCONFIG_SEPARATE)
90
tile = (xpt*ypt*zpt)*s +
95
tile = (xpt*ypt)*(z/dz) + xpt*(y/dy) + x/dx;
101
* Check an (x,y,z,s) coordinate
102
* against the image bounds.
105
TIFFCheckTile(TIFF* tif, uint32 x, uint32 y, uint32 z, tsample_t s)
107
TIFFDirectory *td = &tif->tif_dir;
109
if (x >= td->td_imagewidth) {
110
TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
111
"%lu: Col out of range, max %lu",
113
(unsigned long) (td->td_imagewidth - 1));
116
if (y >= td->td_imagelength) {
117
TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
118
"%lu: Row out of range, max %lu",
120
(unsigned long) (td->td_imagelength - 1));
123
if (z >= td->td_imagedepth) {
124
TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
125
"%lu: Depth out of range, max %lu",
127
(unsigned long) (td->td_imagedepth - 1));
130
if (td->td_planarconfig == PLANARCONFIG_SEPARATE &&
131
s >= td->td_samplesperpixel) {
132
TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
133
"%lu: Sample out of range, max %lu",
135
(unsigned long) (td->td_samplesperpixel - 1));
142
* Compute how many tiles are in an image.
145
TIFFNumberOfTiles(TIFF* tif)
147
TIFFDirectory *td = &tif->tif_dir;
148
uint32 dx = td->td_tilewidth;
149
uint32 dy = td->td_tilelength;
150
uint32 dz = td->td_tiledepth;
153
if (dx == (uint32) -1)
154
dx = td->td_imagewidth;
155
if (dy == (uint32) -1)
156
dy = td->td_imagelength;
157
if (dz == (uint32) -1)
158
dz = td->td_imagedepth;
159
ntiles = (dx == 0 || dy == 0 || dz == 0) ? 0 :
160
multiply(tif, multiply(tif, TIFFhowmany(td->td_imagewidth, dx),
161
TIFFhowmany(td->td_imagelength, dy),
162
"TIFFNumberOfTiles"),
163
TIFFhowmany(td->td_imagedepth, dz), "TIFFNumberOfTiles");
164
if (td->td_planarconfig == PLANARCONFIG_SEPARATE)
165
ntiles = multiply(tif, ntiles, td->td_samplesperpixel,
166
"TIFFNumberOfTiles");
171
* Compute the # bytes in each row of a tile.
174
TIFFTileRowSize(TIFF* tif)
176
TIFFDirectory *td = &tif->tif_dir;
179
if (td->td_tilelength == 0 || td->td_tilewidth == 0)
180
return ((tsize_t) 0);
181
rowsize = multiply(tif, td->td_bitspersample, td->td_tilewidth,
183
if (td->td_planarconfig == PLANARCONFIG_CONTIG)
184
rowsize = multiply(tif, rowsize, td->td_samplesperpixel,
186
return ((tsize_t) TIFFhowmany8(rowsize));
190
* Compute the # bytes in a variable length, row-aligned tile.
193
TIFFVTileSize(TIFF* tif, uint32 nrows)
195
TIFFDirectory *td = &tif->tif_dir;
198
if (td->td_tilelength == 0 || td->td_tilewidth == 0 ||
199
td->td_tiledepth == 0)
200
return ((tsize_t) 0);
201
if (td->td_planarconfig == PLANARCONFIG_CONTIG &&
202
td->td_photometric == PHOTOMETRIC_YCBCR &&
205
* Packed YCbCr data contain one Cb+Cr for every
206
* HorizontalSampling*VerticalSampling Y values.
207
* Must also roundup width and height when calculating
208
* since images that are not a multiple of the
209
* horizontal/vertical subsampling area include
210
* YCbCr data for the extended image.
213
TIFFroundup(td->td_tilewidth, td->td_ycbcrsubsampling[0]);
215
TIFFhowmany8(multiply(tif, w, td->td_bitspersample,
217
tsize_t samplingarea =
218
td->td_ycbcrsubsampling[0]*td->td_ycbcrsubsampling[1];
219
if (samplingarea == 0) {
220
TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "Invalid YCbCr subsampling");
223
nrows = TIFFroundup(nrows, td->td_ycbcrsubsampling[1]);
224
/* NB: don't need TIFFhowmany here 'cuz everything is rounded */
225
tilesize = multiply(tif, nrows, rowsize, "TIFFVTileSize");
226
tilesize = summarize(tif, tilesize,
227
multiply(tif, 2, tilesize / samplingarea,
231
tilesize = multiply(tif, nrows, TIFFTileRowSize(tif),
234
multiply(tif, tilesize, td->td_tiledepth, "TIFFVTileSize"));
238
* Compute the # bytes in a row-aligned tile.
241
TIFFTileSize(TIFF* tif)
243
return (TIFFVTileSize(tif, tif->tif_dir.td_tilelength));
247
* Compute a default tile size based on the image
248
* characteristics and a requested value. If a
249
* request is <1 then we choose a size according
250
* to certain heuristics.
253
TIFFDefaultTileSize(TIFF* tif, uint32* tw, uint32* th)
255
(*tif->tif_deftilesize)(tif, tw, th);
259
_TIFFDefaultTileSize(TIFF* tif, uint32* tw, uint32* th)
262
if (*(int32*) tw < 1)
264
if (*(int32*) th < 1)
266
/* roundup to a multiple of 16 per the spec */
268
*tw = TIFFroundup(*tw, 16);
270
*th = TIFFroundup(*th, 16);
273
/* vim: set ts=8 sts=8 sw=8 noet: */