1# Checks for JPEG 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# JPEG 28set(JPEG_SUPPORT FALSE) 29if (FALSE) # XXX(kitware): hardcode settings 30find_package(JPEG) 31option(jpeg "use libjpeg (required for JPEG compression)" ${JPEG_FOUND}) 32else () 33set(jpeg 1) 34set(JPEG_FOUND 1) # VTK::jpeg 35endif () 36if (jpeg AND JPEG_FOUND) 37 set(JPEG_SUPPORT TRUE) 38endif() 39 40# Old-jpeg 41set(OJPEG_SUPPORT FALSE) 42if (FALSE) # XXX(kitware): hardcode settings 43option(old-jpeg "support for Old JPEG compression (read-only)" ${JPEG_SUPPORT}) 44else () 45set(old-jpeg 1) 46endif () 47if (old-jpeg AND JPEG_SUPPORT) 48 set(OJPEG_SUPPORT TRUE) 49endif() 50 51# 8/12-bit jpeg mode 52if (FALSE) # XXX(kitware): hardcode settings 53set(JPEG12_INCLUDE_DIR JPEG12_INCLUDE_DIR-NOTFOUND CACHE PATH "Include directory for 12-bit libjpeg") 54set(JPEG12_LIBRARY JPEG12_LIBRARY-NOTFOUND CACHE FILEPATH "12-bit libjpeg library") 55set(JPEG_DUAL_MODE_8_12 FALSE) 56if (JPEG12_INCLUDE_DIR AND JPEG12_LIBRARY) 57 set(JPEG12_LIBRARIES ${JPEG12_LIBRARY}) 58 set(JPEG12_FOUND TRUE) 59else() 60 set(JPEG12_FOUND FALSE) 61endif() 62option(jpeg12 "enable libjpeg 8/12-bit dual mode (requires separate 12-bit libjpeg build)" ${JPEG12_FOUND}) 63else () 64set(jpeg12 0) 65endif () 66if (jpeg12 AND JPEG12_FOUND) 67 set(JPEG_DUAL_MODE_8_12 TRUE) 68 set(LIBJPEG_12_PATH "${JPEG12_INCLUDE_DIR}/jpeglib.h") 69endif() 70