1# Checks for deflate codec support
2#
3# Copyright © 2015 Open Microscopy Environment / University of Dundee
4# Copyright © 2021 Roger Leigh <rleigh@codelibre.net>
5# Written by Roger Leigh <rleigh@codelibre.net>
6#
7# Permission to use, copy, modify, distribute, and sell this software and
8# its documentation for any purpose is hereby granted without fee, provided
9# that (i) the above copyright notices and this permission notice appear in
10# all copies of the software and related documentation, and (ii) the names of
11# Sam Leffler and Silicon Graphics may not be used in any advertising or
12# publicity relating to the software without the specific, prior written
13# permission of Sam Leffler and Silicon Graphics.
14#
15# THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
16# EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
17# WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
18#
19# IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
20# ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
21# OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
22# WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
23# LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
24# OF THIS SOFTWARE.
25
26
27# ZLIB
28set(ZLIB_SUPPORT FALSE)
29find_package(ZLIB)
30option(zlib "use zlib (required for Deflate compression)" ${ZLIB_FOUND})
31if(zlib AND ZLIB_FOUND)
32    set(ZLIB_SUPPORT TRUE)
33endif()
34set(ZIP_SUPPORT ${ZLIB_SUPPORT})
35
36# libdeflate
37set(LIBDEFLATE_SUPPORT FALSE)
38find_package(Deflate)
39option(libdeflate "use libdeflate (optional for faster Deflate support, still requires zlib)" ${Deflate_FOUND})
40if (libdeflate AND Deflate_FOUND AND ZIP_SUPPORT)
41    set(LIBDEFLATE_SUPPORT TRUE)
42endif()
43if(Deflate_FOUND AND NOT ZIP_SUPPORT)
44    message(WARNING "libdeflate available but zlib is not. libdeflate cannot be used")
45endif()
46