cmake_minimum_required(VERSION 2.8.7)

project(libwebp C)

# Options for coder / decoder executables.

option(WEBP_ENABLE_SIMD "Enable any SIMD optimization." ON)

option(WEBP_BUILD_CWEBP "Build the cwebp command line tool." OFF)

option(WEBP_BUILD_DWEBP "Build the dwebp command line tool." OFF)

option(WEBP_BUILD_GIF2WEBP "Build the gif2webp conversion tool." OFF)

option(WEBP_BUILD_IMG2WEBP "Build the img2webp animation tool." OFF)

option(WEBP_BUILD_WEBPINFO "Build the webpinfo command line tool." OFF)

option(WEBP_BUILD_WEBP_JS "Emscripten build of webp.js." OFF)

option(WEBP_NEAR_LOSSLESS "Enable near-lossless encoding" ON)

option(WEBP_ENABLE_SWAP_16BIT_CSP "Enable byte swap for 16 bit colorspaces." OFF)

if(WEBP_BUILD_WEBP_JS)

  set(WEBP_ENABLE_SIMD OFF)

endif()

set(WEBP_DEP_LIBRARIES)

set(WEBP_DEP_INCLUDE_DIRS)

if(NOT CMAKE_BUILD_TYPE)

  set(CMAKE_BUILD_TYPE "Release" CACHE

    "Build type: Release, Debug or RelWithDebInfo" STRING FORCE

  )

endif()

# Include dependencies.

include(cmake/deps.cmake)

################################################################################

# Options.

if(WEBP_ENABLE_SWAP_16BIT_CSP)

  add_definitions(-DWEBP_SWAP_16BIT_CSP=1)

endif()

################################################################################

# Android only.

if(ANDROID)

  include_directories(${ANDROID_NDK}/sources/android/cpufeatures)

  add_library(cpufeatures STATIC

    ${ANDROID_NDK}/sources/android/cpufeatures/cpu-features.c

  )

  target_link_libraries(cpufeatures dl)

  set(WEBP_DEP_LIBRARIES ${WEBP_DEP_LIBRARIES} cpufeatures)

  set(WEBP_DEP_INCLUDE_DIRS ${WEBP_DEP_INCLUDE_DIRS}

    ${ANDROID_NDK}/sources/android/cpufeatures

  )

  add_definitions(-DHAVE_CPU_FEATURES_H=1)

  set(HAVE_CPU_FEATURES_H 1)

else()

  set(HAVE_CPU_FEATURES_H 0)

endif()

################################################################################

# WebP source files.

# Read the Makefile.am to get the source files.

# We expect the Makefiles to define the sources as defined in

# the first regex. E.g.:

# libimagedec_la_SOURCES  = image_dec.c image_dec.h

function(parse_Makefile_am FOLDER VAR SRC_REGEX)

  file(READ ${FOLDER}/Makefile.am MAKEFILE_AM)

  string(REGEX MATCHALL "${SRC_REGEX}_SOURCES[ ]*\\+?=[ ]+[0-9a-z\\._ ]*"

    FILES_PER_LINE ${MAKEFILE_AM}

  )

  set(SRCS ${${VAR}})

  foreach(FILES ${FILES_PER_LINE})

    string(FIND ${FILES} "=" OFFSET)

    math(EXPR OFFSET "${OFFSET} + 2")

    string(SUBSTRING ${FILES} ${OFFSET} -1 FILES)

    if(FILES)

      string(REGEX MATCHALL "[0-9a-z\\._]+"

        FILES ${FILES}

      )

      foreach(FILE ${FILES})

        list(APPEND SRCS ${FOLDER}/${FILE})

      endforeach()

    endif()

  endforeach()

  set(${VAR} ${SRCS} PARENT_SCOPE)

endfunction()

set(WEBP_SRC_DIR ${CMAKE_CURRENT_SOURCE_DIR}/src)

parse_Makefile_am(${WEBP_SRC_DIR}/dec "WEBP_DEC_SRCS" "")

parse_Makefile_am(${WEBP_SRC_DIR}/demux "WEBP_DEMUX_SRCS" "")

parse_Makefile_am(${WEBP_SRC_DIR}/dsp "WEBP_DSP_COMMON_SRCS" "COMMON")

parse_Makefile_am(${WEBP_SRC_DIR}/dsp "WEBP_DSP_ENC_SRCS" "ENC")

parse_Makefile_am(${WEBP_SRC_DIR}/dsp "WEBP_DSP_ENC_SRCS" "dsp_[^ ]*")

parse_Makefile_am(${WEBP_SRC_DIR}/dsp "WEBP_DSP_DEC_SRCS" "decode_[^ ]*")

parse_Makefile_am(${WEBP_SRC_DIR}/enc "WEBP_ENC_SRCS" "")

parse_Makefile_am(${WEBP_SRC_DIR}/utils "WEBP_UTILS_COMMON_SRCS" "COMMON")

parse_Makefile_am(${WEBP_SRC_DIR}/utils "WEBP_UTILS_ENC_SRCS" "ENC")

parse_Makefile_am(${WEBP_SRC_DIR}/utils "WEBP_UTILS_DEC_SRCS" "decode_[^ ]*")

# Remove the files specific to SIMD we don't use.

foreach(FILE ${WEBP_SIMD_FILES_NOT_TO_INCLUDE})

  list(REMOVE_ITEM WEBP_DSP_ENC_SRCS ${FILE})

  list(REMOVE_ITEM WEBP_DSP_DEC_SRCS ${FILE})

endforeach()

### Define the mandatory libraries.

# Build the webpdecoder library.

if(MSVC)

  # avoid security warnings for e.g., fopen() used in the examples.

  add_definitions(-D_CRT_SECURE_NO_WARNINGS)

else()

  add_definitions(-Wall)

endif()

include_directories(${CMAKE_CURRENT_SOURCE_DIR} ${WEBP_DEP_INCLUDE_DIRS})

add_library(webpdecode OBJECT ${WEBP_DEC_SRCS})

add_library(webpdspdecode OBJECT ${WEBP_DSP_COMMON_SRCS} ${WEBP_DSP_DEC_SRCS})

add_library(webputilsdecode OBJECT ${WEBP_UTILS_COMMON_SRCS}

  ${WEBP_UTILS_DEC_SRCS})

add_library(webpdecoder $<TARGET_OBJECTS:webpdecode>

  $<TARGET_OBJECTS:webpdspdecode> $<TARGET_OBJECTS:webputilsdecode>)

target_link_libraries(webpdecoder ${WEBP_DEP_LIBRARIES})

# Build the webp library.

add_library(webpencode OBJECT ${WEBP_ENC_SRCS})

add_library(webpdsp OBJECT ${WEBP_DSP_COMMON_SRCS} ${WEBP_DSP_DEC_SRCS}

  ${WEBP_DSP_ENC_SRCS})

add_library(webputils OBJECT ${WEBP_UTILS_COMMON_SRCS} ${WEBP_UTILS_DEC_SRCS}

  ${WEBP_UTILS_ENC_SRCS})

add_library(webp $<TARGET_OBJECTS:webpdecode> $<TARGET_OBJECTS:webpdsp>

  $<TARGET_OBJECTS:webpencode> $<TARGET_OBJECTS:webputils>)

target_link_libraries(webp ${WEBP_DEP_LIBRARIES})

# Make sure the OBJECT libraries are built with position independent code

# (it is not ON by default).

set_target_properties(webpdecode webpdspdecode webputilsdecode

  webpencode webpdsp webputils PROPERTIES POSITION_INDEPENDENT_CODE ON)

# Build the webp demux library.

add_library(webpdemux ${WEBP_DEMUX_SRCS})

target_link_libraries(webpdemux webp)

# Set the version numbers.

function(parse_version FILE NAME VAR)

  file(READ ${CMAKE_CURRENT_SOURCE_DIR}/src/${FILE} SOURCE_FILE)

  string(REGEX MATCH "${NAME}_la_LDFLAGS[^\n]* -version-info [0-9:]+" TMP

    ${SOURCE_FILE})

  string(REGEX MATCH "[0-9:]+" TMP ${TMP})

  string(REGEX REPLACE ":" "." VERSION ${TMP})

  set(${VAR} "${VERSION}" PARENT_SCOPE)

endfunction()

parse_version(Makefile.am webp WEBP_WEBP_SOVERSION)

set_target_properties(webp PROPERTIES VERSION ${PACKAGE_VERSION}

  SOVERSION ${WEBP_WEBP_SOVERSION})

parse_version(Makefile.am webpdecoder WEBP_DECODER_SOVERSION)

set_target_properties(webpdecoder PROPERTIES VERSION ${PACKAGE_VERSION}

  SOVERSION ${WEBP_DECODER_SOVERSION})

parse_version(demux/Makefile.am webpdemux WEBP_DEMUX_SOVERSION)

set_target_properties(webpdemux PROPERTIES VERSION ${PACKAGE_VERSION}

  SOVERSION ${WEBP_DEMUX_SOVERSION})

# Define the libraries to install.

set(INSTALLED_LIBRARIES webpdecoder webp webpdemux)

### Deal with SIMD.

# Change the compile flags for SIMD files we use.

list(LENGTH WEBP_SIMD_FILES_TO_INCLUDE WEBP_SIMD_FILES_TO_INCLUDE_LENGTH)

math(EXPR WEBP_SIMD_FILES_TO_INCLUDE_RANGE

  "${WEBP_SIMD_FILES_TO_INCLUDE_LENGTH}-1"

)

foreach(I_FILE RANGE ${WEBP_SIMD_FILES_TO_INCLUDE_RANGE})

  list(GET WEBP_SIMD_FILES_TO_INCLUDE ${I_FILE} FILE)

  list(GET WEBP_SIMD_FLAGS_TO_INCLUDE ${I_FILE} SIMD_COMPILE_FLAG)

  set_source_files_properties(${FILE} PROPERTIES

    COMPILE_FLAGS ${SIMD_COMPILE_FLAG}

  )

endforeach()

# Build the executables if asked for.

if(WEBP_BUILD_CWEBP OR WEBP_BUILD_DWEBP OR

   WEBP_BUILD_GIF2WEBP OR WEBP_BUILD_IMG2WEBP OR WEBP_BUILD_WEBP_JS)

  # Example utility library.

  parse_Makefile_am(${CMAKE_CURRENT_SOURCE_DIR}/examples "EXAMPLEUTIL_SRCS"

    "example_util_[^ ]*")

  list(APPEND EXAMPLEUTIL_SRCS

    ${CMAKE_CURRENT_SOURCE_DIR}/examples/stopwatch.h)

  add_library(exampleutil ${EXAMPLEUTIL_SRCS})

  parse_Makefile_am(${CMAKE_CURRENT_SOURCE_DIR}/imageio "IMAGEIOUTILS_SRCS"

    "imageio_util_[^ ]*")

  add_library(imageioutil ${IMAGEIOUTILS_SRCS})

  target_link_libraries(imageioutil webp)

  # Image-decoding utility library.

  parse_Makefile_am(${CMAKE_CURRENT_SOURCE_DIR}/imageio "IMAGEDEC_SRCS"

    "imagedec_[^ ]*")

  add_library(imagedec ${IMAGEDEC_SRCS})

  target_link_libraries(imagedec imageioutil webpdemux webp

    ${WEBP_DEP_IMG_LIBRARIES})

  # Image-encoding utility library.

  parse_Makefile_am(${CMAKE_CURRENT_SOURCE_DIR}/imageio "IMAGEENC_SRCS"

    "imageenc_[^ ]*")

  add_library(imageenc ${IMAGEENC_SRCS})

  target_link_libraries(imageenc webp)

  set_property(TARGET exampleutil imageioutil imagedec imageenc

    PROPERTY INCLUDE_DIRECTORIES

    ${CMAKE_CURRENT_SOURCE_DIR}/src ${CMAKE_CURRENT_BINARY_DIR}/src)

endif()

if(WEBP_BUILD_DWEBP)

  # dwebp

  include_directories(${WEBP_DEP_IMG_INCLUDE_DIRS})

  parse_Makefile_am(${CMAKE_CURRENT_SOURCE_DIR}/examples "DWEBP_SRCS"

    "dwebp")

  add_executable(dwebp ${DWEBP_SRCS})

  target_link_libraries(dwebp exampleutil imagedec imageenc webpdecoder)

  install(TARGETS dwebp RUNTIME DESTINATION bin)

  set_property(TARGET dwebp PROPERTY INCLUDE_DIRECTORIES

    ${CMAKE_CURRENT_SOURCE_DIR}/src ${CMAKE_CURRENT_BINARY_DIR}/src)

endif()

if(WEBP_BUILD_CWEBP)

  # cwebp

  include_directories(${WEBP_DEP_IMG_INCLUDE_DIRS})

  parse_Makefile_am(${CMAKE_CURRENT_SOURCE_DIR}/examples "CWEBP_SRCS"

    "cwebp")

  add_executable(cwebp ${CWEBP_SRCS})

  target_link_libraries(cwebp exampleutil imagedec webp)

  install(TARGETS cwebp RUNTIME DESTINATION bin)

  set_property(TARGET cwebp PROPERTY INCLUDE_DIRECTORIES

    ${CMAKE_CURRENT_SOURCE_DIR}/src ${CMAKE_CURRENT_BINARY_DIR}/src)

endif()

if(WEBP_BUILD_GIF2WEBP AND NOT GIF_FOUND)

  unset(WEBP_BUILD_GIF2WEBP CACHE)

endif()

if(WEBP_BUILD_GIF2WEBP OR WEBP_BUILD_IMG2WEBP)

  parse_Makefile_am(${CMAKE_CURRENT_SOURCE_DIR}/src/mux "WEBP_MUX_SRCS"

    "")

  add_library(webpmux ${WEBP_MUX_SRCS})

  target_link_libraries(webpmux webp)

  parse_version(mux/Makefile.am webpmux WEBP_MUX_SOVERSION)

  set_target_properties(webpmux PROPERTIES VERSION ${PACKAGE_VERSION}

    SOVERSION ${WEBP_MUX_SOVERSION})

  list(APPEND INSTALLED_LIBRARIES webpmux)

endif()

if(WEBP_BUILD_GIF2WEBP)

  # gif2webp

  include_directories(${WEBP_DEP_GIF_INCLUDE_DIRS})

  parse_Makefile_am(${CMAKE_CURRENT_SOURCE_DIR}/examples "GIF2WEBP_SRCS"

    "gif2webp")

  add_executable(gif2webp ${GIF2WEBP_SRCS})

  target_link_libraries(gif2webp exampleutil imageioutil webp webpmux

    ${WEBP_DEP_GIF_LIBRARIES})

  install(TARGETS gif2webp RUNTIME DESTINATION bin)

  set_property(TARGET gif2webp PROPERTY INCLUDE_DIRECTORIES

    ${CMAKE_CURRENT_SOURCE_DIR}/src ${CMAKE_CURRENT_BINARY_DIR}/src)

endif()

if(WEBP_BUILD_IMG2WEBP)

  # img2webp

  include_directories(${WEBP_DEP_IMG_INCLUDE_DIRS})

  parse_Makefile_am(${CMAKE_CURRENT_SOURCE_DIR}/examples "IMG2WEBP_SRCS"

    "img2webp")

  add_executable(img2webp ${IMG2WEBP_SRCS})

  target_link_libraries(img2webp exampleutil imagedec imageioutil webp webpmux)

  install(TARGETS img2webp RUNTIME DESTINATION bin)

  set_property(TARGET img2webp PROPERTY INCLUDE_DIRECTORIES

    ${CMAKE_CURRENT_SOURCE_DIR}/src ${CMAKE_CURRENT_BINARY_DIR}/src)

endif()

if (WEBP_BUILD_WEBPINFO)

  # webpinfo

  include_directories(${WEBP_DEP_IMG_INCLUDE_DIRS})

  parse_Makefile_am(${CMAKE_CURRENT_SOURCE_DIR}/examples "WEBPINFO_SRCS"

    "webpinfo")

  add_executable(webpinfo ${WEBPINFO_SRCS})

  target_link_libraries(webpinfo exampleutil imageioutil)

  install(TARGETS webpinfo RUNTIME DESTINATION bin)

  set_property(TARGET webpinfo PROPERTY INCLUDE_DIRECTORIES

    ${CMAKE_CURRENT_SOURCE_DIR}/src ${CMAKE_CURRENT_BINARY_DIR}/src)

endif()

if(WEBP_BUILD_WEBP_JS)

  # JavaScript version

  add_executable(webp_js

                 ${CMAKE_CURRENT_SOURCE_DIR}/extras/webp_to_sdl.c)

  target_link_libraries(webp_js webpdecoder SDL)

  set(WEBP_HAVE_SDL 1)

  set_target_properties(webp_js PROPERTIES LINK_FLAGS

      "-s EXPORTED_FUNCTIONS='[\"_WebpToSDL\"]' -s INVOKE_RUN=0 \

       -s EXTRA_EXPORTED_RUNTIME_METHODS='[\"cwrap\"]'")

  set_target_properties(webp_js PROPERTIES OUTPUT_NAME webp)

  target_compile_definitions(webp_js PUBLIC EMSCRIPTEN WEBP_HAVE_SDL)

  # WASM version

  add_executable(webp_wasm

                 ${CMAKE_CURRENT_SOURCE_DIR}/extras/webp_to_sdl.c)

  target_link_libraries(webp_wasm webpdecoder SDL)

  set_target_properties(webp_wasm PROPERTIES LINK_FLAGS

      "-s WASM=1 -s 'BINARYEN_METHOD=\"native-wasm\"' \

       -s EXPORTED_FUNCTIONS='[\"_WebpToSDL\"]' -s INVOKE_RUN=0 \

       -s EXTRA_EXPORTED_RUNTIME_METHODS='[\"cwrap\"]'")

  target_compile_definitions(webp_wasm PUBLIC EMSCRIPTEN WEBP_HAVE_SDL)

  target_compile_definitions(webpdecoder PUBLIC EMSCRIPTEN)

endif()

# Generate the config.h file.

configure_file(${CMAKE_CURRENT_LIST_DIR}/cmake/config.h.in

  ${CMAKE_CURRENT_BINARY_DIR}/src/webp/config.h)

add_definitions(-DHAVE_CONFIG_H)

# The webp folder is included as we reference config.h as

# ../webp/config.h or webp/config.h

include_directories(${CMAKE_CURRENT_BINARY_DIR})

# Install the different headers and libraries.

install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/src/webp/decode.h

              ${CMAKE_CURRENT_SOURCE_DIR}/src/webp/demux.h

              ${CMAKE_CURRENT_SOURCE_DIR}/src/webp/encode.h

              ${CMAKE_CURRENT_SOURCE_DIR}/src/webp/mux.h

              ${CMAKE_CURRENT_SOURCE_DIR}/src/webp/mux_types.h

              ${CMAKE_CURRENT_SOURCE_DIR}/src/webp/types.h

        DESTINATION include/webp)

install(TARGETS ${INSTALLED_LIBRARIES}

        LIBRARY DESTINATION lib

        ARCHIVE DESTINATION lib)

# Create the CMake version file.

include(CMakePackageConfigHelpers)

write_basic_package_version_file(

  "${CMAKE_CURRENT_BINARY_DIR}/WebPConfigVersion.cmake"

  VERSION ${PACKAGE_VERSION}

  COMPATIBILITY AnyNewerVersion

)

# Create the Config file.

include(CMakePackageConfigHelpers)

set(ConfigPackageLocation share/WebP/cmake/)

configure_package_config_file(

  ${CMAKE_CURRENT_SOURCE_DIR}/cmake/WebPConfig.cmake.in

  ${CMAKE_CURRENT_BINARY_DIR}/WebPConfig.cmake

  INSTALL_DESTINATION ${ConfigPackageLocation}

)

# Install the generated CMake files.

install(

  FILES "${CMAKE_CURRENT_BINARY_DIR}/WebPConfigVersion.cmake"

        "${CMAKE_CURRENT_BINARY_DIR}/WebPConfig.cmake"

  DESTINATION ${ConfigPackageLocation}

)

# Install the man pages.

set(MAN_PAGES cwebp.1 dwebp.1 gif2webp.1 img2webp.1 vwebp.1 webpmux.1

  webpinfo.1)

set(EXEC_BUILDS "CWEBP" "DWEBP" "GIF2WEBP" "IMG2WEBP" "VWEBP" "WEBPMUX"

  "WEBPINFO")

list(LENGTH MAN_PAGES MAN_PAGES_LENGTH)

math(EXPR MAN_PAGES_RANGE "${MAN_PAGES_LENGTH} - 1")

foreach(I_MAN RANGE ${MAN_PAGES_RANGE})

  list(GET EXEC_BUILDS ${I_MAN} EXEC_BUILD)

  if(WEBP_BUILD_${EXEC_BUILD})

    list(GET MAN_PAGES ${I_MAN} MAN_PAGE)

    install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/man/${MAN_PAGE}

      DESTINATION ${CMAKE_INSTALL_PREFIX}/share/man/man1

      COMPONENT doc

    )

  endif()

endforeach()