.TH "ktx_deflate" 1 "Sun Jun 14 2026 18:00:57" "Version 0.0.0" "KTX Tools Reference" \" -*- nroff -*-
.ad l
.nh
.SH NAME
ktx_deflate \- ktx deflate 
.PP
Deflate (supercompress) a KTX2 file\&.
.SH "SYNOPSIS"
.PP
ktx deflate [option\&.\&.\&.] \fIinput-file\fP \fIoutput-file\fP 
.SH "DESCRIPTION"
.PP
\fBktx\fP \fBdeflate\fP deflates (supercompresses) the KTX file specified as the \fIinput-file\fP and saves it as the \fIoutput-file\fP\&. If the \fIinput-file\fP is '-' the file will be read from the stdin\&. If the \fIoutput-path\fP is '-' the output file will be written to the stdout\&. If the input file is already supercompressed it will be inflated then supercompressed again using the options specified here and a warning will be issued\&. If the input file is invalid the first encountered validation error is displayed to the stderr and the command exits with the relevant non-zero status code\&.

.PP
\fBktx\fP \fBdeflate\fP cannot be applied to KTX files that have been supercompressed with BasisLZ\&.
.SH "OPTIONS"
.PP
The following options are available:   

.PP
.IP "\fB--zstd <level> 
.IP "" 1c
Supercompress the data with Zstandard\&. Cannot be used with ETC1S / BasisLZ format\&. Level range is [1,22]\&. Lower levels give faster but worse compression\&. Values above 20 should be used with caution as they require more memory\&.  

.PP
.IP "\fB--zlib <level> 
.IP "" 1c
Supercompress the data with ZLIB\&. Cannot be used with ETC1S / BasisLZ format\&. Level range is [1,9]\&. Lower levels give faster but worse compression\&.  

.PP

.PP

.PP
.IP "\fB-q, --quiet 
.IP "" 1c
Silence warning about already supercompressed input fiile\&. 

.PP
.IP "\fB-e, --warnings-as-errors 
.IP "" 1c
Treat warnings as errors\&. 

.PP

.PP
.IP "\fB-h, --help 
.IP "" 1c
Print this usage message and exit\&. 

.PP
.IP "\fB-v, --version 
.IP "" 1c
Print the version number of this program and exit\&. 

.PP
.SH "EXIT STATUS"
.PP
.IP "\(bu" 2
0 - Success
.IP "\(bu" 2
1 - Command line error
.IP "\(bu" 2
2 - IO failure
.IP "\(bu" 2
3 - Invalid input file
.IP "\(bu" 2
4 - Runtime or library error
.IP "\(bu" 2
5 - Not supported state or operation
.IP "\(bu" 2
6 - Requested feature is not yet implemented  
.PP
.SH "HISTORY"
.PP
\fBVersion 4\&.0\fP
.RS 4

.IP "\(bu" 2
Initial version
.PP
.RE
.PP
.SH "AUTHOR"
.PP
.IP "\(bu" 2
Mark Callow [@MarkCallow] 
.PP