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