src/tiff/man/TIFFbuffer.3tiff

   1 .\" $Id: TIFFbuffer.3tiff,v 1.2 2005-11-02 11:07:18 dron Exp $
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   3 .\" Copyright (c) 1995 Sam Leffler
   4 .\" Copyright (c) 1995 Silicon Graphics, Inc.
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  25 .if n .po 0
  26 .TH TIFFBUFFER 3TIFF "November 1, 2005" "libtiff"
  27 .SH NAME
  28 TIFFReadBufferSetup, TIFFWriteBufferSetup \- I/O buffering control routines
  29 .SH SYNOPSIS
  30 .nf
  31 .B "#include <tiffio.h>"
  32 .sp
  33 .BI "int TIFFReadBufferSetup(TIFF *" tif ", tdata_t " buffer ", tsize_t " size ");"
  34 .BI "int TIFFWriteBufferSetup(TIFF *" tif ", tdata_t " buffer ", tsize_t " size ");"
  35 .fi
  36 .SH DESCRIPTION
  37 The following routines are provided for client-control of the I/O buffers used
  38 by the library. Applications need never use these routines; they are provided
  39 only for ``intelligent clients'' that wish to optimize memory usage and/or
  40 eliminate potential copy operations that can occur when working with images
  41 that have data stored without compression.
  42 .PP
  43 .I TIFFReadBufferSetup
  44 sets up the data buffer used to read raw (encoded) data from a file. If the
  45 specified pointer is
  46 .SM NULL
  47 (zero), then a buffer of the appropriate size is allocated. Otherwise the
  48 caller must guarantee that the buffer is large enough to hold any individual
  49 strip of raw data.
  50 .I TIFFReadBufferSetup
  51 returns a non-zero value if the setup was successful and zero otherwise.
  52 .PP
  53 .I TIFFWriteBufferSetup
  54 sets up the data buffer used to write raw (encoded) data to a file. If the
  55 specified
  56 .I size
  57 is \-1 then the buffer size is selected to hold a complete tile or strip, or
  58 at least 8 kilobytes, whichever is greater. If the specified
  59 .I buffer
  60 is
  61 .SM NULL
  62 (zero), then a buffer of the appropriate size is dynamically allocated.
  63 .I TIFFWriteBufferSetup
  64 returns a non-zero value if the setup was successful and zero otherwise.
  65 .SH DIAGNOSTICS
  66 .BR "%s: No space for data buffer at scanline %ld" .
  67 .I TIFFReadBufferSetup
  68 was unable to dynamically allocate space for a data buffer.
  69 .PP
  70 .BR "%s: No space for output buffer" .
  71 .I TIFFWriteBufferSetup
  72 was unable to dynamically allocate space for a data buffer.
  73 .SH "SEE ALSO"
  74 .BR libtiff (3TIFF)
  75 .PP
  76 Libtiff library home page:
  77 .BR http://www.remotesensing.org/libtiff/