projects / wxWidgets.git / blame
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1 | .\" |
| 2 | .\" Copyright (c) 1988-1997 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 | .if n .po 0 | |
| 25 | .TH TIFFReadTile 3TIFF "December 16, 1991" "libtiff" | |
| 26 | .SH NAME | |
| 27 | TIFFReadTile \- read and decode a tile of data from an open | |
| 28 | .SM TIFF | |
| 29 | file | |
| 30 | .SH SYNOPSIS | |
| 31 | .B "#include <tiffio.h>" | |
| 32 | .sp | |
| 33 | .BI "tsize_t TIFFReadTile(TIFF *" tif ", tdata_t " buf ", uint32 " x ", uint32 " y ", uint32 " z ", tsample_t " sample ")" | |
| 34 | .SH DESCRIPTION | |
| 35 | Return the data for the tile | |
| 36 | .I containing | |
| 37 | the specified coordinates. The data placed in | |
| 38 | .I buf | |
| 39 | are returned decompressed and, typically, in the native byte- and | |
| 40 | bit-ordering, but are otherwise packed (see further below). The buffer must be | |
| 41 | large enough to hold an entire tile of data. Applications should call the | |
| 42 | routine | |
| 43 | .IR TIFFTileSize | |
| 44 | to find out the size (in bytes) of a tile buffer. The | |
| 45 | .I x | |
| 46 | and | |
| 47 | .I y | |
| 48 | parameters are always used by | |
| 49 | .IR TIFFReadTile . | |
| 50 | The | |
| 51 | .I z | |
| 52 | parameter is used if the image is deeper than 1 slice (\c | |
| 53 | .IR ImageDepth >1). | |
| 54 | The | |
| 55 | .I sample | |
| 56 | parameter is used only if data are organized in separate planes (\c | |
| 57 | .IR PlanarConfiguration =2). | |
| 58 | .SH NOTES | |
| 59 | The library attempts to hide bit- and byte-ordering differences between the | |
| 60 | image and the native machine by converting data to the native machine order. | |
| 61 | Bit reversal is done if the | |
| 62 | .I FillOrder | |
| 63 | tag is opposite to the native machine bit order. 16- and 32-bit samples are | |
| 64 | automatically byte-swapped if the file was written with a byte order opposite | |
| 65 | to the native machine byte order, | |
| 66 | .SH "RETURN VALUES" | |
| 67 | .IR TIFFReadTile | |
| 68 | returns \-1 if it detects an error; otherwise the number of bytes in the | |
| 69 | decoded tile is returned. | |
| 70 | .SH DIAGNOSTICS | |
| 71 | All error messages are directed to the | |
| 72 | .BR TIFFError (3TIFF) | |
| 73 | routine. | |
| 74 | .SH "SEE ALSO" | |
| 75 | .BR TIFFCheckTile (3TIFF), | |
| 76 | .BR TIFFComputeTile (3TIFF), | |
| 77 | .BR TIFFOpen (3TIFF), | |
| 78 | .BR TIFFReadEncodedTile (3TIFF), | |
| 79 | .BR TIFFReadRawTile (3TIFF), | |
| 80 | .BR libtiff (3TIFF) | |
| 81 | .PP | |
| 82 | Libtiff library home page: | |
| 83 | .BR http://www.remotesensing.org/libtiff/ |