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      1 # ----------------------------------------------------------------------------
      2 #  Detect 3rd-party image IO libraries
      3 # ----------------------------------------------------------------------------
      4 
      5 # --- zlib (required) ---
      6 if(BUILD_ZLIB)
      7   ocv_clear_vars(ZLIB_FOUND)
      8 else()
      9   find_package(ZLIB "${MIN_VER_ZLIB}")
     10   if(ZLIB_FOUND AND ANDROID)
     11     if(ZLIB_LIBRARIES STREQUAL "${ANDROID_SYSROOT}/usr/lib/libz.so")
     12       set(ZLIB_LIBRARIES z)
     13     endif()
     14   endif()
     15 endif()
     16 
     17 if(NOT ZLIB_FOUND)
     18   ocv_clear_vars(ZLIB_LIBRARY ZLIB_LIBRARIES ZLIB_INCLUDE_DIRS)
     19 
     20   set(ZLIB_LIBRARY zlib)
     21   add_subdirectory("${OpenCV_SOURCE_DIR}/3rdparty/zlib")
     22   set(ZLIB_INCLUDE_DIRS "${${ZLIB_LIBRARY}_SOURCE_DIR}" "${${ZLIB_LIBRARY}_BINARY_DIR}")
     23   set(ZLIB_LIBRARIES ${ZLIB_LIBRARY})
     24 
     25   ocv_parse_header2(ZLIB "${${ZLIB_LIBRARY}_SOURCE_DIR}/zlib.h" ZLIB_VERSION)
     26 endif()
     27 
     28 # --- libtiff (optional, should be searched after zlib) ---
     29 if(WITH_TIFF)
     30   if(BUILD_TIFF)
     31     ocv_clear_vars(TIFF_FOUND)
     32   else()
     33     include(FindTIFF)
     34     if(TIFF_FOUND)
     35       ocv_parse_header("${TIFF_INCLUDE_DIR}/tiff.h" TIFF_VERSION_LINES TIFF_VERSION_CLASSIC TIFF_VERSION_BIG TIFF_VERSION TIFF_BIGTIFF_VERSION)
     36     endif()
     37   endif()
     38 
     39   if(NOT TIFF_FOUND)
     40     ocv_clear_vars(TIFF_LIBRARY TIFF_LIBRARIES TIFF_INCLUDE_DIR)
     41 
     42     set(TIFF_LIBRARY libtiff)
     43     set(TIFF_LIBRARIES ${TIFF_LIBRARY})
     44     add_subdirectory("${OpenCV_SOURCE_DIR}/3rdparty/libtiff")
     45     set(TIFF_INCLUDE_DIR "${${TIFF_LIBRARY}_SOURCE_DIR}" "${${TIFF_LIBRARY}_BINARY_DIR}")
     46     ocv_parse_header("${${TIFF_LIBRARY}_SOURCE_DIR}/tiff.h" TIFF_VERSION_LINES TIFF_VERSION_CLASSIC TIFF_VERSION_BIG TIFF_VERSION TIFF_BIGTIFF_VERSION)
     47   endif()
     48 
     49   if(TIFF_VERSION_CLASSIC AND NOT TIFF_VERSION)
     50     set(TIFF_VERSION ${TIFF_VERSION_CLASSIC})
     51   endif()
     52 
     53   if(TIFF_BIGTIFF_VERSION AND NOT TIFF_VERSION_BIG)
     54     set(TIFF_VERSION_BIG ${TIFF_BIGTIFF_VERSION})
     55   endif()
     56 
     57   if(NOT TIFF_VERSION_STRING AND TIFF_INCLUDE_DIR)
     58     list(GET TIFF_INCLUDE_DIR 0 _TIFF_INCLUDE_DIR)
     59     if(EXISTS "${_TIFF_INCLUDE_DIR}/tiffvers.h")
     60       file(STRINGS "${_TIFF_INCLUDE_DIR}/tiffvers.h" tiff_version_str REGEX "^#define[\t ]+TIFFLIB_VERSION_STR[\t ]+\"LIBTIFF, Version .*")
     61       string(REGEX REPLACE "^#define[\t ]+TIFFLIB_VERSION_STR[\t ]+\"LIBTIFF, Version +([^ \\n]*).*" "\\1" TIFF_VERSION_STRING "${tiff_version_str}")
     62       unset(tiff_version_str)
     63     endif()
     64     unset(_TIFF_INCLUDE_DIR)
     65   endif()
     66 
     67   set(HAVE_TIFF YES)
     68 endif()
     69 
     70 # --- libjpeg (optional) ---
     71 if(WITH_JPEG)
     72   if(BUILD_JPEG)
     73     ocv_clear_vars(JPEG_FOUND)
     74   else()
     75     include(FindJPEG)
     76   endif()
     77 
     78   if(NOT JPEG_FOUND)
     79     ocv_clear_vars(JPEG_LIBRARY JPEG_LIBRARIES JPEG_INCLUDE_DIR)
     80 
     81     set(JPEG_LIBRARY libjpeg)
     82     set(JPEG_LIBRARIES ${JPEG_LIBRARY})
     83     add_subdirectory("${OpenCV_SOURCE_DIR}/3rdparty/libjpeg")
     84     set(JPEG_INCLUDE_DIR "${${JPEG_LIBRARY}_SOURCE_DIR}")
     85   endif()
     86 
     87   ocv_parse_header("${JPEG_INCLUDE_DIR}/jpeglib.h" JPEG_VERSION_LINES JPEG_LIB_VERSION)
     88   set(HAVE_JPEG YES)
     89 endif()
     90 
     91 # --- libwebp (optional) ---
     92 
     93 if(WITH_WEBP)
     94   if(BUILD_WEBP)
     95     ocv_clear_vars(WEBP_FOUND WEBP_LIBRARY WEBP_LIBRARIES WEBP_INCLUDE_DIR)
     96   else()
     97     include(cmake/OpenCVFindWebP.cmake)
     98   endif()
     99 endif()
    100 
    101 # --- Add libwebp to 3rdparty/libwebp and compile it if not available ---
    102 if(WITH_WEBP AND NOT WEBP_FOUND)
    103 
    104   set(WEBP_LIBRARY libwebp)
    105   set(WEBP_LIBRARIES ${WEBP_LIBRARY})
    106 
    107   add_subdirectory("${OpenCV_SOURCE_DIR}/3rdparty/libwebp")
    108   set(WEBP_INCLUDE_DIR "${${WEBP_LIBRARY}_SOURCE_DIR}")
    109 endif()
    110 
    111 if(NOT WEBP_VERSION AND WEBP_INCLUDE_DIR)
    112   ocv_clear_vars(ENC_MAJ_VERSION ENC_MIN_VERSION ENC_REV_VERSION)
    113   if(EXISTS "${WEBP_INCLUDE_DIR}/enc/vp8enci.h")
    114     ocv_parse_header("${WEBP_INCLUDE_DIR}/enc/vp8enci.h" WEBP_VERSION_LINES ENC_MAJ_VERSION ENC_MIN_VERSION ENC_REV_VERSION)
    115     set(WEBP_VERSION "${ENC_MAJ_VERSION}.${ENC_MIN_VERSION}.${ENC_REV_VERSION}")
    116   elseif(EXISTS "${WEBP_INCLUDE_DIR}/webp/encode.h")
    117     file(STRINGS "${WEBP_INCLUDE_DIR}/webp/encode.h" WEBP_ENCODER_ABI_VERSION REGEX "#define[ \t]+WEBP_ENCODER_ABI_VERSION[ \t]+([x0-9a-f]+)" )
    118     if(WEBP_ENCODER_ABI_VERSION MATCHES "#define[ \t]+WEBP_ENCODER_ABI_VERSION[ \t]+([x0-9a-f]+)")
    119         set(WEBP_ENCODER_ABI_VERSION "${CMAKE_MATCH_1}")
    120         set(WEBP_VERSION "encoder: ${WEBP_ENCODER_ABI_VERSION}")
    121     else()
    122       unset(WEBP_ENCODER_ABI_VERSION)
    123     endif()
    124   endif()
    125 endif()
    126 
    127 # --- libjasper (optional, should be searched after libjpeg) ---
    128 if(WITH_JASPER)
    129   if(BUILD_JASPER)
    130     ocv_clear_vars(JASPER_FOUND)
    131   else()
    132     include(FindJasper)
    133   endif()
    134 
    135   if(NOT JASPER_FOUND)
    136     ocv_clear_vars(JASPER_LIBRARY JASPER_LIBRARIES JASPER_INCLUDE_DIR)
    137 
    138     set(JASPER_LIBRARY libjasper)
    139     set(JASPER_LIBRARIES ${JASPER_LIBRARY})
    140     add_subdirectory("${OpenCV_SOURCE_DIR}/3rdparty/libjasper")
    141     set(JASPER_INCLUDE_DIR "${${JASPER_LIBRARY}_SOURCE_DIR}")
    142   endif()
    143 
    144   set(HAVE_JASPER YES)
    145 
    146   if(NOT JASPER_VERSION_STRING)
    147     ocv_parse_header2(JASPER "${JASPER_INCLUDE_DIR}/jasper/jas_config.h" JAS_VERSION "")
    148   endif()
    149 endif()
    150 
    151 # --- libpng (optional, should be searched after zlib) ---
    152 if(WITH_PNG)
    153   if(BUILD_PNG)
    154     ocv_clear_vars(PNG_FOUND)
    155   else()
    156     include(FindPNG)
    157     if(PNG_FOUND)
    158       include(CheckIncludeFile)
    159       check_include_file("${PNG_PNG_INCLUDE_DIR}/libpng/png.h" HAVE_LIBPNG_PNG_H)
    160       if(HAVE_LIBPNG_PNG_H)
    161         ocv_parse_header("${PNG_PNG_INCLUDE_DIR}/libpng/png.h" PNG_VERSION_LINES PNG_LIBPNG_VER_MAJOR PNG_LIBPNG_VER_MINOR PNG_LIBPNG_VER_RELEASE)
    162       else()
    163         ocv_parse_header("${PNG_PNG_INCLUDE_DIR}/png.h" PNG_VERSION_LINES PNG_LIBPNG_VER_MAJOR PNG_LIBPNG_VER_MINOR PNG_LIBPNG_VER_RELEASE)
    164       endif()
    165     endif()
    166   endif()
    167 
    168   if(NOT PNG_FOUND)
    169     ocv_clear_vars(PNG_LIBRARY PNG_LIBRARIES PNG_INCLUDE_DIR PNG_PNG_INCLUDE_DIR HAVE_LIBPNG_PNG_H PNG_DEFINITIONS)
    170 
    171     set(PNG_LIBRARY libpng)
    172     set(PNG_LIBRARIES ${PNG_LIBRARY})
    173     add_subdirectory("${OpenCV_SOURCE_DIR}/3rdparty/libpng")
    174     set(PNG_INCLUDE_DIR "${${PNG_LIBRARY}_SOURCE_DIR}")
    175     set(PNG_DEFINITIONS "")
    176     ocv_parse_header("${PNG_INCLUDE_DIR}/png.h" PNG_VERSION_LINES PNG_LIBPNG_VER_MAJOR PNG_LIBPNG_VER_MINOR PNG_LIBPNG_VER_RELEASE)
    177   endif()
    178 
    179   set(HAVE_PNG YES)
    180   set(PNG_VERSION "${PNG_LIBPNG_VER_MAJOR}.${PNG_LIBPNG_VER_MINOR}.${PNG_LIBPNG_VER_RELEASE}")
    181 endif()
    182 
    183 # --- OpenEXR (optional) ---
    184 if(WITH_OPENEXR)
    185   if(BUILD_OPENEXR)
    186     ocv_clear_vars(OPENEXR_FOUND)
    187   else()
    188     include("${OpenCV_SOURCE_DIR}/cmake/OpenCVFindOpenEXR.cmake")
    189   endif()
    190 
    191   if(NOT OPENEXR_FOUND)
    192     ocv_clear_vars(OPENEXR_INCLUDE_PATHS OPENEXR_LIBRARIES OPENEXR_ILMIMF_LIBRARY OPENEXR_VERSION)
    193 
    194     set(OPENEXR_LIBRARIES IlmImf)
    195     set(OPENEXR_ILMIMF_LIBRARY IlmImf)
    196     add_subdirectory("${OpenCV_SOURCE_DIR}/3rdparty/openexr")
    197   endif()
    198 
    199   set(HAVE_OPENEXR YES)
    200 endif()
    201 
    202 # --- GDAL (optional) ---
    203 if(WITH_GDAL)
    204     find_package(GDAL)
    205 
    206     if(NOT GDAL_FOUND)
    207         ocv_clear_vars(GDAL_LIBRARY GDAL_INCLUDE_DIR)
    208         set(HAVE_GDAL NO)
    209     else()
    210         set(HAVE_GDAL YES)
    211         ocv_include_directories(${GDAL_INCLUDE_DIR})
    212     endif()
    213 endif()
    214