.TH "coin_compression_overview" 3 "Tue Jun 23 2026 23:48:38" "Version 4.0.10" "Coin" \" -*- nroff -*-
.ad l
.nh
.SH NAME
coin_compression_overview \- File compression 
.PP
Coin can support reading and writing Inventor and VRML files compressed with either gzip or bzip2 (as of yet - more formats may come in the future)\&. This functionality is of course only enabled when Coin can link with the corresponding compression libraries\&.

.PP
Reading of compressed files happens in a transparent manner - there is nothing the developer has to do to support this\&.

.PP
Writing of compressed files is controlled through the \fBSoOutput::setCompression\fP method\&.

.PP
The list of available compression methods can be fetched with the \fBSoOutput::getAvailableCompressionMethods\fP method\&.

.PP
You cannot use file compression together with I/O to memory buffers, except for reading from memory buffers containing gzip-compressed files\&.

.PP
For backwards compatibility with Coin 2\&.0 and Coin 1\&.0, compressed files must not be used\&. Compressed files works only from Coin 2\&.1 and upwards\&.

.PP
\fBSince\fP
.RS 4
Coin 2\&.1 
.RE
.PP
\fBSee also\fP
.RS 4
\fBSoOutput::setCompression\fP, \fBSoOutput::getAvailableCompressionMethods\fP 
.RE
.PP