WIP: insert elements from V2 framework into the trunk (add missing files)
[openjpeg.git] / thirdparty / libtiff / tif_tile.c
1 /* $Id: tif_tile.c,v 1.12.2.1 2010-06-08 18:50:43 bfriesen Exp $ */
2
3 /*
4  * Copyright (c) 1991-1997 Sam Leffler
5  * Copyright (c) 1991-1997 Silicon Graphics, Inc.
6  *
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.
14  * 
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.  
18  * 
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 
24  * OF THIS SOFTWARE.
25  */
26
27 /*
28  * TIFF Library.
29  *
30  * Tiled Image Support Routines.
31  */
32 #include "tiffiop.h"
33
34 static uint32
35 summarize(TIFF* tif, size_t summand1, size_t summand2, const char* where)
36 {
37         /*
38          * XXX: We are using casting to uint32 here, because sizeof(size_t)
39          * may be larger than sizeof(uint32) on 64-bit architectures.
40          */
41         uint32  bytes = summand1 + summand2;
42
43         if (bytes - summand1 != summand2) {
44                 TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "Integer overflow in %s", where);
45                 bytes = 0;
46         }
47
48         return (bytes);
49 }
50
51 static uint32
52 multiply(TIFF* tif, size_t nmemb, size_t elem_size, const char* where)
53 {
54         uint32  bytes = nmemb * elem_size;
55
56         if (elem_size && bytes / elem_size != nmemb) {
57                 TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "Integer overflow in %s", where);
58                 bytes = 0;
59         }
60
61         return (bytes);
62 }
63
64 /*
65  * Compute which tile an (x,y,z,s) value is in.
66  */
67 ttile_t
68 TIFFComputeTile(TIFF* tif, uint32 x, uint32 y, uint32 z, tsample_t s)
69 {
70         TIFFDirectory *td = &tif->tif_dir;
71         uint32 dx = td->td_tilewidth;
72         uint32 dy = td->td_tilelength;
73         uint32 dz = td->td_tiledepth;
74         ttile_t tile = 1;
75
76         if (td->td_imagedepth == 1)
77                 z = 0;
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); 
88
89                 if (td->td_planarconfig == PLANARCONFIG_SEPARATE) 
90                         tile = (xpt*ypt*zpt)*s +
91                              (xpt*ypt)*(z/dz) +
92                              xpt*(y/dy) +
93                              x/dx;
94                 else
95                         tile = (xpt*ypt)*(z/dz) + xpt*(y/dy) + x/dx;
96         }
97         return (tile);
98 }
99
100 /*
101  * Check an (x,y,z,s) coordinate
102  * against the image bounds.
103  */
104 int
105 TIFFCheckTile(TIFF* tif, uint32 x, uint32 y, uint32 z, tsample_t s)
106 {
107         TIFFDirectory *td = &tif->tif_dir;
108
109         if (x >= td->td_imagewidth) {
110                 TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
111                              "%lu: Col out of range, max %lu",
112                              (unsigned long) x,
113                              (unsigned long) (td->td_imagewidth - 1));
114                 return (0);
115         }
116         if (y >= td->td_imagelength) {
117                 TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
118                              "%lu: Row out of range, max %lu",
119                              (unsigned long) y,
120                              (unsigned long) (td->td_imagelength - 1));
121                 return (0);
122         }
123         if (z >= td->td_imagedepth) {
124                 TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
125                              "%lu: Depth out of range, max %lu",
126                              (unsigned long) z,
127                              (unsigned long) (td->td_imagedepth - 1));
128                 return (0);
129         }
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",
134                              (unsigned long) s,
135                              (unsigned long) (td->td_samplesperpixel - 1));
136                 return (0);
137         }
138         return (1);
139 }
140
141 /*
142  * Compute how many tiles are in an image.
143  */
144 ttile_t
145 TIFFNumberOfTiles(TIFF* tif)
146 {
147         TIFFDirectory *td = &tif->tif_dir;
148         uint32 dx = td->td_tilewidth;
149         uint32 dy = td->td_tilelength;
150         uint32 dz = td->td_tiledepth;
151         ttile_t ntiles;
152
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");
167         return (ntiles);
168 }
169
170 /*
171  * Compute the # bytes in each row of a tile.
172  */
173 tsize_t
174 TIFFTileRowSize(TIFF* tif)
175 {
176         TIFFDirectory *td = &tif->tif_dir;
177         tsize_t rowsize;
178         
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,
182                            "TIFFTileRowSize");
183         if (td->td_planarconfig == PLANARCONFIG_CONTIG)
184                 rowsize = multiply(tif, rowsize, td->td_samplesperpixel,
185                                    "TIFFTileRowSize");
186         return ((tsize_t) TIFFhowmany8(rowsize));
187 }
188
189 /*
190  * Compute the # bytes in a variable length, row-aligned tile.
191  */
192 tsize_t
193 TIFFVTileSize(TIFF* tif, uint32 nrows)
194 {
195         TIFFDirectory *td = &tif->tif_dir;
196         tsize_t tilesize;
197
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 &&
203             !isUpSampled(tif)) {
204                 /*
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.
211                  */
212                 tsize_t w =
213                     TIFFroundup(td->td_tilewidth, td->td_ycbcrsubsampling[0]);
214                 tsize_t rowsize =
215                     TIFFhowmany8(multiply(tif, w, td->td_bitspersample,
216                                           "TIFFVTileSize"));
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");
221                         return 0;
222                 }
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,
228                                               "TIFFVTileSize"),
229                                      "TIFFVTileSize");
230         } else
231                 tilesize = multiply(tif, nrows, TIFFTileRowSize(tif),
232                                     "TIFFVTileSize");
233         return ((tsize_t)
234             multiply(tif, tilesize, td->td_tiledepth, "TIFFVTileSize"));
235 }
236
237 /*
238  * Compute the # bytes in a row-aligned tile.
239  */
240 tsize_t
241 TIFFTileSize(TIFF* tif)
242 {
243         return (TIFFVTileSize(tif, tif->tif_dir.td_tilelength));
244 }
245
246 /*
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.
251  */
252 void
253 TIFFDefaultTileSize(TIFF* tif, uint32* tw, uint32* th)
254 {
255         (*tif->tif_deftilesize)(tif, tw, th);
256 }
257
258 void
259 _TIFFDefaultTileSize(TIFF* tif, uint32* tw, uint32* th)
260 {
261         (void) tif;
262         if (*(int32*) tw < 1)
263                 *tw = 256;
264         if (*(int32*) th < 1)
265                 *th = 256;
266         /* roundup to a multiple of 16 per the spec */
267         if (*tw & 0xf)
268                 *tw = TIFFroundup(*tw, 16);
269         if (*th & 0xf)
270                 *th = TIFFroundup(*th, 16);
271 }
272
273 /* vim: set ts=8 sts=8 sw=8 noet: */
274 /*
275  * Local Variables:
276  * mode: c
277  * c-basic-offset: 8
278  * fill-column: 78
279  * End:
280  */