Tesseract一个免费的OCR引擎源码Google维护和开发

# # tesseract # # ############################################################################## # # cmake settings # # ############################################################################## cmake_minimum_required(VERSION 3.10 FATAL_ERROR) # In-source builds are disabled. if("${CMAKE_CURRENT_SOURCE_DIR}" STREQUAL "${CMAKE_CURRENT_BINARY_DIR}") message( FATAL_ERROR "CMake generation is not possible within the source directory!" "\n Remove the CMakeCache.txt file and try again from another folder, " "e.g.:\n " "\n rm CMakeCache.txt" "\n mkdir build" "\n cd build" "\n cmake ..") endif() set(CMAKE_MODULE_PATH "${CMAKE_MODULE_PATH};${CMAKE_CURRENT_SOURCE_DIR}/cmake") set(EXECUTABLE_OUTPUT_PATH "${CMAKE_BINARY_DIR}/bin") set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${EXECUTABLE_OUTPUT_PATH}") # Use solution folders. set_property(GLOBAL PROPERTY USE_FOLDERS ON) set_property(GLOBAL PROPERTY PREDEFINED_TARGETS_FOLDER "CMake Targets") if(NOT ${CMAKE_VERSION} VERSION_LESS "3.15.0") if(WIN32) cmake_policy(SET CMP0091 NEW) message(STATUS "Setting policy CMP0091 to NEW") endif() endif() # ############################################################################## # # project settings # # ############################################################################## project(tesseract C CXX) # Get version with components from VERSION file. file(STRINGS "VERSION" VERSION_PLAIN) string(REGEX REPLACE "^([^.]*)\\..*" "\\1" VERSION_MAJOR ${VERSION_PLAIN}) string(REGEX REPLACE "^[^.]*\\.([^.]*)\\..*" "\\1" VERSION_MINOR ${VERSION_PLAIN}) string(REGEX REPLACE "^[^.]*\\.[^.]*\\.([0-9]*).*" "\\1" VERSION_PATCH ${VERSION_PLAIN}) if(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/.git) execute_process(COMMAND git --git-dir ${CMAKE_CURRENT_SOURCE_DIR}/.git describe --abbrev=4 OUTPUT_VARIABLE GIT_REV) string(REGEX REPLACE "\n$" "" PACKAGE_VERSION "${GIT_REV}") endif() if(NOT PACKAGE_VERSION) set(PACKAGE_VERSION ${VERSION_PLAIN}) endif() # Provide also same macro names as autoconf (see configure.ac). set(GENERIC_MAJOR_VERSION ${VERSION_MAJOR}) set(GENERIC_MINOR_VERSION ${VERSION_MINOR}) set(GENERIC_MICRO_VERSION ${VERSION_PATCH}) set(MINIMUM_LEPTONICA_VERSION 1.74) # ############################################################################## # # options # # ############################################################################## message(STATUS "Configuring tesseract version ${PACKAGE_VERSION}...") if(WIN32) option(SW_BUILD "Build with sw" ON) else() option(SW_BUILD "Build with sw" OFF) endif() option(OPENMP_BUILD "Build with openmp support" OFF) # see issue #1662 option(GRAPHICS_DISABLED "Disable disable graphics (ScrollView)" OFF) option(DISABLED_LEGACY_ENGINE "Disable the legacy OCR engine" OFF) option(ENABLE_LTO "Enable link-time optimization" OFF) option(FAST_FLOAT "Enable float for LSTM" ON) option(ENABLE_OPENCL "Enable unsupported experimental OpenCL support" OFF) option(ENABLE_NATIVE "Enable optimization for host CPU (could break HW compatibility)" OFF) # see # https://stackoverflow.com/questions/52653025/why-is-march-native-used-so-rarely option(BUILD_TRAINING_TOOLS "Build training tools" ON) option(BUILD_TESTS "Build tests" OFF) option(USE_SYSTEM_ICU "Use system ICU" OFF) option(DISABLE_TIFF "Disable build with libtiff (if available)" OFF) option(DISABLE_ARCHIVE "Disable build with libarchive (if available)" OFF) option(DISABLE_CURL "Disable build with libcurl (if available)" OFF) option(INSTALL_CONFIGS "Install tesseract configs" ON) if(NOT ${CMAKE_VERSION} VERSION_LESS "3.15.0") if(WIN32 AND MSVC) option(WIN32_MT_BUILD "Build with MT flag for MSVC" OFF) endif() endif() # ############################################################################## # # compiler and linker # # ############################################################################## if(CMAKE_CXX_COMPILER_ID MATCHES "Clang") set(CLANG 1) endif() if(NOT CMAKE_BUILD_TYPE) message(STATUS "Setting build type to 'Release' as none was specified.") set(CMAKE_BUILD_TYPE Release CACHE STRING "Choose the type of build." FORCE) set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS "Debug" "Release") endif() include(CheckCXXCompilerFlag) set(CMAKE_CXX_STANDARD 17) if("cxx_std_20" IN_LIST CMAKE_CXX_COMPILE_FEATURES) set(CMAKE_CXX_STANDARD 20) endif() set(CMAKE_CXX_STANDARD_REQUIRED ON) if(NOT CMAKE_CXX_COMPILER_ID STREQUAL "GNU") # cygwin gnu c++ needs to use -std=gnu++17 instead of -std=c++17 set(CMAKE_CXX_EXTENSIONS OFF) endif() if(BUILD_SHARED_LIBS) set(CMAKE_CXX_VISIBILITY_PRESET hidden) endif() # LTO cmake_policy(SET CMP0069 NEW) include(CheckIPOSupported) check_ipo_supported(RESULT LTO_SUPPORTED OUTPUT error) if(LTO_SUPPORTED) message(STATUS "IPO / LTO supported") else() message(STATUS "IPO / LTO not supported: <${error}>") endif() set(MARCH_NATIVE_OPT OFF) if(ENABLE_NATIVE) check_cxx_compiler_flag("-march=native" COMPILER_SUPPORTS_MARCH_NATIVE) if(COMPILER_SUPPORTS_MARCH_NATIVE) set(DOTPRODUCT_FLAGS "${DOTPRODUCT_FLAGS} -march=native") if(NOT CLANG AND MSVC) # clang-cl does not know this argument set(DOTPRODUCT_FLAGS "${DOTPRODUCT_FLAGS} -mtune=native") endif() set(MARCH_NATIVE_OPT ON) endif(COMPILER_SUPPORTS_MARCH_NATIVE) endif(ENABLE_NATIVE) message(STATUS "CMAKE_SYSTEM_PROCESSOR=<${CMAKE_SYSTEM_PROCESSOR}>") if(CMAKE_SYSTEM_PROCESSOR MATCHES "x86|x86_64|AMD64|amd64|i386|i686") set(HAVE_NEON FALSE) if(MSVC) set(HAVE_AVX ON) set(AVX_COMPILE_FLAGS "/arch:AVX") add_definitions("-DHAVE_AVX") set(HAVE_AVX2 ON) set(AVX2_COMPILE_FLAGS "/arch:AVX2") add_definitions("-DHAVE_AVX2") set(HAVE_AVX512F ON) set(AVX512F_COMPILE_FLAGS "/arch:AVX512") add_definitions("-DHAVE_AVX512F") set(HAVE_FMA ON) set(FMA_COMPILE_FLAGS "-D__FMA__") add_definitions("-DHAVE_FMA") set(HAVE_SSE4_1 ON) set(SSE4_1_COMPILE_FLAGS "-D__SSE4_1__") add_definitions("-DHAVE_SSE4_1") set(DOTPRODUCT_FLAGS "${DOTPRODUCT_FLAGS} -openmp:experimental") add_definitions("-DOPENMP_SIMD") # clang with MSVC compatibility if(CLANG) set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-microsoft-unqualified-friend") if(HAVE_FMA) set(FMA_COMPILE_FLAGS "-mfma ${FMA_COMPILE_FLAGS}") endif(HAVE_FMA) if(HAVE_SSE4_1) set(SSE4_1_COMPILE_FLAGS "-msse4.1 ${SSE4_1_COMPILE_FLAGS}") endif(HAVE_SSE4_1) endif(CLANG) else() # if not MSVC check_cxx_compiler_flag("-mavx" HAVE_AVX) if(HAVE_AVX) set(AVX_COMPILE_FLAGS "-mavx") add_definitions("-DHAVE_AVX") endif(HAVE_AVX) check_cxx_compiler_flag("-mavx2" HAVE_AVX2) if(HAVE_AVX2) set(AVX2_COMPILE_FLAGS "-mavx2") add_definitions("-DHAVE_AVX2") endif() check_cxx_compiler_flag("-mavx512f" HAVE_AVX512F) if(HAVE_AVX512F) set(AVX512F_COMPILE_FLAGS "-mavx512f") add_definitions("-DHAVE_AVX512F") endif() check_cxx_compiler_flag("-mfma" HAVE_FMA) if(HAVE_FMA) set(FMA_COMPILE_FLAGS "-mfma") add_definitions("-DHAVE_FMA") endif() check_cxx_compiler_flag("-msse4.1" HAVE_SSE4_1) if(HAVE_SSE4_1) set(SSE4_1_COMPILE_FLAGS "-msse4.1") add_definitions("-DHAVE_SSE4_1") endif() check_cxx_compiler_flag("-fopenmp-simd" OPENMP_SIMD) if(OPENMP_SIMD) set(DOTPRODUCT_FLAGS "${DOTPRODUCT_FLAGS} -fopenmp-simd") add_definitions("-DOPENMP_SIMD") endif(OPENMP_SIMD) endif(MSVC) elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "arm64|aarch64.*|AARCH64.*") set(HAVE_AVX FALSE) set(HAVE_AVX2 FALSE) set(HAVE_AVX512F FALSE) set(HAVE_FMA FALSE) set(HAVE_SSE4_1 FALSE) set(HAVE_NEON TRUE) elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "arm.*") set(HAVE_AVX FALSE) set(HAVE_AVX2 FALSE) set(HAVE_AVX512F FALSE) set(HAVE_FMA FALSE) set(HAVE_SSE4_1