# TIFFbuffer

## Synopsis

    #include <tiffio.h>

int TIFFReadBufferSetup(TIFF *tif, tdata_t buffer, tsize_t size)

int TIFFWriteBufferSetup(TIFF *tif, tdata_t buffer, tsize_t size)

## Description

The following routines are provided for client-control of the I/O buffers used by the library. Applications need never use these routines; they are provided only for "intelligent clients" that wish to optimize memory usage and/or eliminate potential copy operations that can occur when working with images that have data stored without compression.

`TIFFReadBufferSetup()` sets up the data buffer used to read raw (encoded) data from a file. If the specified pointer is `NULL` (zero), then a buffer of the appropriate size is allocated. Otherwise the caller must guarantee that the buffer is large enough to hold any individual strip of raw data. `TIFFReadBufferSetup()` returns a non-zero value if the setup was successful and zero otherwise.

`TIFFWriteBufferSetup()` sets up the data buffer used to write raw (encoded) data to a file. If the specified size is -1, then the buffer size is selected to hold a complete tile or strip, or at least 8 kilobytes, whichever is greater. If the specified buffer is `NULL` (zero), then a buffer of the appropriate size is dynamically allocated. `TIFFWriteBufferSetup()` returns a non-zero value if the setup was successful and zero otherwise.

## Diagnostics

`%s: No space for data buffer at scanline %ld`:

> `TIFFReadBufferSetup()` was unable to dynamically allocate space for a data buffer.

`%s: No space for output buffer`:

> `TIFFWriteBufferSetup()` was unable to dynamically allocate space for a data buffer.

## See also

libtiff (3tiff)