网站后台更新图片,网站建设 中企动力福州阀门,江门高端网站建设,微网站是什么简介 应用在调用系统固件集成的C/C三方库时#xff0c;可能会由于系统固件集成端与IDE的NDK中libc版本不一致导致调用失败#xff0c;而且系统固件集成的C/C三方库对于应用的调式也很不友好#xff0c;需要多方编译调试#xff0c;很不方便。因此本文将通过在IDE上适配ope…简介 应用在调用系统固件集成的C/C三方库时可能会由于系统固件集成端与IDE的NDK中libc版本不一致导致调用失败而且系统固件集成的C/C三方库对于应用的调式也很不友好需要多方编译调试很不方便。因此本文将通过在IDE上适配openjpeg 三方库为例介绍IDE上适配一个C/C三方库的具体流程。 创建工程 在开发进行三方库适配以及napi接口开发前我们需要创建一个三方库对应的工程具体创建工程方法可以参照文档通过IDE开发一个Napi工程。 IDE上三方库的适配 本文中我们以适配 openjpeg 为例介绍整个适配流程 。 原生库准备 下载代码 通过openjpeg github网址通过CodeDownload ZIP选项下载最新版本的源码包并将其解压后放在IDE工程中的CPP目录下。 下载openjpeg 2.5.0版本的库 将库放在IDE工程 分析编译依赖 分析CMakeLists.txt 对于库不是很复杂且目录结构简单的库可以通过分析CMakeLists.txt文件来获取库的依赖。在openjpeg库中 通过分析最外层CMakeLists.txt文件可以得知编译openjpeg核心代码以及需要依赖编译库自带thirdparty如下图 而分析thirdparty/CMakeLists.txt文件如果BUILD_THIRDPARTY开关未打开将会通过FindPkgConfig自动搜索系统(IDE工具的SDK编译链)中的库文件如下图 并由此文件可以分析出该库非强制依赖了libz, libpng, libtiff以及liblcms2如对libpng依赖的分析中 IDE工具的SDK编译链中只有libz库其他三个库是没有的所以如果需要其他三个库的功能我们需要将BUILD_THIRDPARTY开关打开此开关在库顶层目录的CMakeLists.txt文件中如下图 到此本库的依赖就已经分析完了。 通过运行cmake分析 我们除了分析CMakeLists.txt文件外也可以通过在linux中通过cmake过程来分析对应的依赖。 我们在执行cmake的时候会有对相关的依赖库的提示 -- Large File support - found -- Looking for include file malloc.h -- Looking for include file malloc.h - found -- Looking for _aligned_malloc -- Looking for _aligned_malloc - not found -- Looking for posix_memalign -- Looking for posix_memalign - found -- Looking for memalign -- Looking for memalign - found -- Found PkgConfig: /usr/bin/pkg-config (found version 0.29.1) -- Found ZLIB: /usr/lib/x86_64-linux-gnu/libz.so (found version 1.2.11) -- Your system seems to have a Z lib available, we will use it to generate PNG lib -- Found PNG: /usr/lib/x86_64-linux-gnu/libpng.so (found version 1.6.37) -- Your system seems to have a PNG lib available, we will use it -- Found TIFF: /usr/lib/x86_64-linux-gnu/libtiff.so (found version 4.1.0) -- Your system seems to have a TIFF lib available, we will use it -- Could NOT find LCMS2 (missing: LCMS2_LIBRARY LCMS2_INCLUDE_DIR) -- Could NOT find LCMS (missing: LCMS_LIBRARY LCMS_INCLUDE_DIR) -- LCMS2 or LCMS lib not found, activate BUILD_THIRDPARTY if you want build it -- Configuring done -- Generating done由以上信息可以查看到编译此库需要依赖libz(found version “1.2.11”)libpng(found version “1.6.37”)libtiff(found version “4.1.0”)以及liblcms2(LCMS2 or LCMS lib not found, activate BUILD_THIRDPARTY if you want build it)。从提示中可以看到如果想要使能对应的功能且系统库中未包含该依赖的话需要打开BUILD_THIRDPARTY 开关。 除了cmake中获取的依赖我们也可以通过分析make编译过程获取更多的信息具体方法可以参照三方库适配依赖分析。 重构CMakeLists 对于不复杂的库且没有其他四方库依赖的三方库我们可以使用原生库的CMakeLists.txt文件但是对于一些复杂的且强制依赖其他四方库的库使用其原生CMakeLists.txt文件无法解决四方库依赖的问题。此时我们就需要对三方库的CMakeLists.txt文件进行重构。 重构CMakeLists文件主要需涉及以下几点 动态生成配置文件 查看原生CMakeLists.txt文件中是否有configure_file配置项如果没有可直接跳过此步骤。 在openjpeg库的原生CMakeLists.txt文件中有2个配置文件需要动态生成 # opj_config.h generation (2/2) configure_file(${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/opj_config.h.cmake.in${CMAKE_CURRENT_BINARY_DIR}/src/lib/openjp2/opj_config.hONLY)configure_file(${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/opj_config_private.h.cmake.in${CMAKE_CURRENT_BINARY_DIR}/src/lib/openjp2/opj_config_private.hONLY)configure_file带了ONLY参数该参数限制了变量替换让其只替换被VAR引用的变量。因此我们需要分析两个文件中对应的VAR配置规则。首先在opj_config.h.cmake.in文件定义的对应VAR的定义 /* create opj_config.h for CMake */ #cmakedefine OPJ_HAVE_STDINT_H OPJ_HAVE_STDINT_H /*--------------------------------------------------------------------------*/ /* OpenJPEG Versioning *//* Version number. */ #define OPJ_VERSION_MAJOR OPENJPEG_VERSION_MAJOR #define OPJ_VERSION_MINOR OPENJPEG_VERSION_MINOR #define OPJ_VERSION_BUILD OPENJPEG_VERSION_BUILD在分析VAR的赋值规则在顶层CMakeLists.txt中 # opj_config.h generation (1/2)# Check if some include files are provided by the system include(EnsureFileInclude) # These files are mandatory ensure_file_include(string.h HAVE_STRING_H YES) ensure_file_include(memory.h HAVE_MEMORY_H YES) ensure_file_include(stdlib.h HAVE_STDLIB_H YES) ensure_file_include(stdio.h HAVE_STDIO_H YES) ensure_file_include(math.h HAVE_MATH_H YES) ensure_file_include(float.h HAVE_FLOAT_H YES) ensure_file_include(time.h HAVE_TIME_H YES) ensure_file_include(stdarg.h HAVE_STDARG_H YES) ensure_file_include(ctype.h HAVE_CTYPE_H YES) ensure_file_include(assert.h HAVE_ASSERT_H YES)# For the following files, we provide an alternative, they are not mandatory ensure_file_include(stdint.h OPJ_HAVE_STDINT_H NO) ensure_file_include(inttypes.h OPJ_HAVE_INTTYPES_H NO)从以上内容通过分析ensure_file_include可以知道在执行cmake时从系统中查找stdint.h文件如果查找到则将OPJ_HAVE_STDINT_H置起否则不会改变。而IDE上是没有stdint.h文件的因此我们需要在配置文件之前手动将OPJ_HAVE_STDINT_H置起如下 set(OPJ_HAVE_STDINT_H TRUE)其他变量也是通过类似的方法分析。 相关宏定义的设置 通过add_definitions设置三方库的相关宏定义如下所示 add_definitions(-DOPJ_HAVE_PNG_H0 -DOPJ_HAVE_TIFF_H1 -DOPJ_HAVE_LCMS2_H1)源码文件编译 三方库编译的源码可以通过在linux执行make的时候查看分析到 [ 0%] Building C object src/lib/openjp2/CMakeFiles/openjp2_static.dir/thread.c.o [ 1%] Building C object src/lib/openjp2/CMakeFiles/openjp2_static.dir/bio.c.o [ 1%] Building C object src/lib/openjp2/CMakeFiles/openjp2_static.dir/cio.c.o [ 2%] Building C object src/lib/openjp2/CMakeFiles/openjp2_static.dir/dwt.c.o [ 3%] Building C object src/lib/openjp2/CMakeFiles/openjp2_static.dir/event.c.o [ 3%] Building C object src/lib/openjp2/CMakeFiles/openjp2_static.dir/ht_dec.c.o [ 4%] Building C object src/lib/openjp2/CMakeFiles/openjp2_static.dir/image.c.o [ 5%] Building C object src/lib/openjp2/CMakeFiles/openjp2_static.dir/invert.c.o [ 5%] Building C object src/lib/openjp2/CMakeFiles/openjp2_static.dir/j2k.c.o [ 6%] Building C object src/lib/openjp2/CMakeFiles/openjp2_static.dir/jp2.c.o [ 7%] Building C object src/lib/openjp2/CMakeFiles/openjp2_static.dir/mct.c.o [ 7%] Building C object src/lib/openjp2/CMakeFiles/openjp2_static.dir/mqc.c.o [ 8%] Building C object src/lib/openjp2/CMakeFiles/openjp2_static.dir/openjpeg.c.o [ 9%] Building C object src/lib/openjp2/CMakeFiles/openjp2_static.dir/opj_clock.c.o [ 9%] Building C object src/lib/openjp2/CMakeFiles/openjp2_static.dir/pi.c.o [ 10%] Building C object src/lib/openjp2/CMakeFiles/openjp2_static.dir/t1.c.o [ 10%] Building C object src/lib/openjp2/CMakeFiles/openjp2_static.dir/t2.c.o [ 11%] Building C object src/lib/openjp2/CMakeFiles/openjp2_static.dir/tcd.c.o [ 12%] Building C object src/lib/openjp2/CMakeFiles/openjp2_static.dir/tgt.c.o [ 12%] Building C object src/lib/openjp2/CMakeFiles/openjp2_static.dir/function_list.c.o [ 13%] Building C object src/lib/openjp2/CMakeFiles/openjp2_static.dir/opj_malloc.c.o [ 14%] Building C object src/lib/openjp2/CMakeFiles/openjp2_static.dir/sparse_array.c.o [ 14%] Linking C static library ../../../bin/libopenjp2.a [ 14%] Built target openjp2_static Scanning dependencies of target openjp2 [ 14%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/thread.c.o [ 15%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/bio.c.o [ 16%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/cio.c.o [ 16%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/dwt.c.o [ 17%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/event.c.o [ 18%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/ht_dec.c.o [ 18%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/image.c.o [ 19%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/invert.c.o [ 20%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/j2k.c.o [ 20%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/jp2.c.o [ 21%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/mct.c.o [ 22%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/mqc.c.o [ 22%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/openjpeg.c.o [ 23%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/opj_clock.c.o [ 23%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/pi.c.o [ 24%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/t1.c.o [ 25%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/t2.c.o [ 25%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/tcd.c.o [ 26%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/tgt.c.o [ 27%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/function_list.c.o [ 27%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/opj_malloc.c.o [ 28%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/sparse_array.c.o [ 29%] Linking C shared library ../../../bin/libopenjp2.so [ 29%] Built target openjp2 Scanning dependencies of target z [ 30%] Building C object thirdparty/libz/CMakeFiles/z.dir/adler32.c.o [ 31%] Building C object thirdparty/libz/CMakeFiles/z.dir/compress.c.o [ 31%] Building C object thirdparty/libz/CMakeFiles/z.dir/crc32.c.o [ 32%] Building C object thirdparty/libz/CMakeFiles/z.dir/deflate.c.o [ 32%] Building C object thirdparty/libz/CMakeFiles/z.dir/gzclose.c.o [ 33%] Building C object thirdparty/libz/CMakeFiles/z.dir/gzlib.c.o [ 34%] Building C object thirdparty/libz/CMakeFiles/z.dir/gzread.c.o [ 34%] Building C object thirdparty/libz/CMakeFiles/z.dir/gzwrite.c.o [ 35%] Building C object thirdparty/libz/CMakeFiles/z.dir/inflate.c.o [ 36%] Building C object thirdparty/libz/CMakeFiles/z.dir/infback.c.o [ 36%] Building C object thirdparty/libz/CMakeFiles/z.dir/inftrees.c.o [ 37%] Building C object thirdparty/libz/CMakeFiles/z.dir/inffast.c.o [ 38%] Building C object thirdparty/libz/CMakeFiles/z.dir/trees.c.o [ 38%] Building C object thirdparty/libz/CMakeFiles/z.dir/uncompr.c.o [ 39%] Building C object thirdparty/libz/CMakeFiles/z.dir/zutil.c.o [ 40%] Linking C static library ../lib/libz.a [ 40%] Built target z Scanning dependencies of target tiff [ 40%] Building C object thirdparty/libtiff/CMakeFiles/tiff.dir/tif_aux.c.o [ 41%] Building C object thirdparty/libtiff/CMakeFiles/tiff.dir/tif_close.c.o [ 42%] Building C object thirdparty/libtiff/CMakeFiles/tiff.dir/tif_codec.c.o [ 42%] Building C object thirdparty/libtiff/CMakeFiles/tiff.dir/tif_color.c.o [ 43%] Building C object thirdparty/libtiff/CMakeFiles/tiff.dir/tif_compress.c.o [ 43%] Building C object thirdparty/libtiff/CMakeFiles/tiff.dir/tif_dir.c.o [ 44%] Building C object thirdparty/libtiff/CMakeFiles/tiff.dir/tif_dirinfo.c.o [ 45%] Building C object thirdparty/libtiff/CMakeFiles/tiff.dir/tif_dirread.c.o [ 45%] Building C object thirdparty/libtiff/CMakeFiles/tiff.dir/tif_dirwrite.c.o [ 46%] Building C object thirdparty/libtiff/CMakeFiles/tiff.dir/tif_dumpmode.c.o [ 47%] Building C object thirdparty/libtiff/CMakeFiles/tiff.dir/tif_error.c.o [ 47%] Building C object thirdparty/libtiff/CMakeFiles/tiff.dir/tif_extension.c.o [ 48%] Building C object thirdparty/libtiff/CMakeFiles/tiff.dir/tif_fax3.c.o [ 49%] Building C object thirdparty/libtiff/CMakeFiles/tiff.dir/tif_fax3sm.c.o [ 49%] Building C object thirdparty/libtiff/CMakeFiles/tiff.dir/tif_flush.c.o [ 50%] Building C object thirdparty/libtiff/CMakeFiles/tiff.dir/tif_getimage.c.o [ 51%] Building C object thirdparty/libtiff/CMakeFiles/tiff.dir/tif_jbig.c.o [ 51%] Building C object thirdparty/libtiff/CMakeFiles/tiff.dir/tif_jpeg.c.o [ 52%] Building C object thirdparty/libtiff/CMakeFiles/tiff.dir/tif_luv.c.o [ 52%] Building C object thirdparty/libtiff/CMakeFiles/tiff.dir/tif_lzw.c.o [ 53%] Building C object thirdparty/libtiff/CMakeFiles/tiff.dir/tif_next.c.o [ 54%] Building C object thirdparty/libtiff/CMakeFiles/tiff.dir/tif_ojpeg.c.o [ 54%] Building C object thirdparty/libtiff/CMakeFiles/tiff.dir/tif_open.c.o [ 55%] Building C object thirdparty/libtiff/CMakeFiles/tiff.dir/tif_packbits.c.o [ 56%] Building C object thirdparty/libtiff/CMakeFiles/tiff.dir/tif_pixarlog.c.o [ 56%] Building C object thirdparty/libtiff/CMakeFiles/tiff.dir/tif_predict.c.o [ 57%] Building C object thirdparty/libtiff/CMakeFiles/tiff.dir/tif_print.c.o [ 58%] Building C object thirdparty/libtiff/CMakeFiles/tiff.dir/tif_read.c.o [ 58%] Building C object thirdparty/libtiff/CMakeFiles/tiff.dir/tif_strip.c.o [ 59%] Building C object thirdparty/libtiff/CMakeFiles/tiff.dir/tif_swab.c.o [ 59%] Building C object thirdparty/libtiff/CMakeFiles/tiff.dir/tif_thunder.c.o [ 60%] Building C object thirdparty/libtiff/CMakeFiles/tiff.dir/tif_tile.c.o [ 61%] Building C object thirdparty/libtiff/CMakeFiles/tiff.dir/tif_version.c.o [ 61%] Building C object thirdparty/libtiff/CMakeFiles/tiff.dir/tif_warning.c.o [ 62%] Building C object thirdparty/libtiff/CMakeFiles/tiff.dir/tif_write.c.o [ 63%] Building C object thirdparty/libtiff/CMakeFiles/tiff.dir/tif_zip.c.o [ 63%] Building C object thirdparty/libtiff/CMakeFiles/tiff.dir/tif_jpeg_12.c.o [ 64%] Building C object thirdparty/libtiff/CMakeFiles/tiff.dir/tif_lzma.c.o [ 65%] Building C object thirdparty/libtiff/CMakeFiles/tiff.dir/tif_unix.c.o [ 65%] Linking C static library ../lib/libtiff.a [ 65%] Built target tiff Scanning dependencies of target lcms2 [ 65%] Building C object thirdparty/liblcms2/CMakeFiles/lcms2.dir/src/cmsalpha.c.o [ 66%] Building C object thirdparty/liblcms2/CMakeFiles/lcms2.dir/src/cmscam02.c.o [ 66%] Building C object thirdparty/liblcms2/CMakeFiles/lcms2.dir/src/cmscgats.c.o [ 67%] Building C object thirdparty/liblcms2/CMakeFiles/lcms2.dir/src/cmscnvrt.c.o [ 68%] Building C object thirdparty/liblcms2/CMakeFiles/lcms2.dir/src/cmserr.c.o [ 68%] Building C object thirdparty/liblcms2/CMakeFiles/lcms2.dir/src/cmsgamma.c.o [ 69%] Building C object thirdparty/liblcms2/CMakeFiles/lcms2.dir/src/cmsgmt.c.o [ 70%] Building C object thirdparty/liblcms2/CMakeFiles/lcms2.dir/src/cmshalf.c.o [ 70%] Building C object thirdparty/liblcms2/CMakeFiles/lcms2.dir/src/cmsintrp.c.o [ 71%] Building C object thirdparty/liblcms2/CMakeFiles/lcms2.dir/src/cmsio0.c.o [ 72%] Building C object thirdparty/liblcms2/CMakeFiles/lcms2.dir/src/cmsio1.c.o [ 72%] Building C object thirdparty/liblcms2/CMakeFiles/lcms2.dir/src/cmslut.c.o [ 73%] Building C object thirdparty/liblcms2/CMakeFiles/lcms2.dir/src/cmsmd5.c.o [ 73%] Building C object thirdparty/liblcms2/CMakeFiles/lcms2.dir/src/cmsmtrx.c.o [ 74%] Building C object thirdparty/liblcms2/CMakeFiles/lcms2.dir/src/cmsnamed.c.o [ 75%] Building C object thirdparty/liblcms2/CMakeFiles/lcms2.dir/src/cmsopt.c.o [ 75%] Building C object thirdparty/liblcms2/CMakeFiles/lcms2.dir/src/cmspack.c.o [ 76%] Building C object thirdparty/liblcms2/CMakeFiles/lcms2.dir/src/cmspcs.c.o [ 77%] Building C object thirdparty/liblcms2/CMakeFiles/lcms2.dir/src/cmsplugin.c.o [ 77%] Building C object thirdparty/liblcms2/CMakeFiles/lcms2.dir/src/cmsps2.c.o [ 78%] Building C object thirdparty/liblcms2/CMakeFiles/lcms2.dir/src/cmssamp.c.o [ 79%] Building C object thirdparty/liblcms2/CMakeFiles/lcms2.dir/src/cmssm.c.o [ 79%] Building C object thirdparty/liblcms2/CMakeFiles/lcms2.dir/src/cmstypes.c.o [ 80%] Building C object thirdparty/liblcms2/CMakeFiles/lcms2.dir/src/cmsvirt.c.o [ 81%] Building C object thirdparty/liblcms2/CMakeFiles/lcms2.dir/src/cmswtpnt.c.o [ 81%] Building C object thirdparty/liblcms2/CMakeFiles/lcms2.dir/src/cmsxform.c.o [ 82%] Linking C static library ../lib/liblcms2.a [ 82%] Built target lcms2 Scanning dependencies of target opj_dump [ 82%] Building C object src/bin/jp2/CMakeFiles/opj_dump.dir/opj_dump.c.o [ 83%] Building C object src/bin/jp2/CMakeFiles/opj_dump.dir/convert.c.o [ 84%] Building C object src/bin/jp2/CMakeFiles/opj_dump.dir/convertbmp.c.o [ 84%] Building C object src/bin/jp2/CMakeFiles/opj_dump.dir/index.c.o [ 85%] Building C object src/bin/jp2/CMakeFiles/opj_dump.dir/__/common/color.c.o [ 86%] Building C object src/bin/jp2/CMakeFiles/opj_dump.dir/__/common/opj_getopt.c.o [ 86%] Building C object src/bin/jp2/CMakeFiles/opj_dump.dir/converttif.c.o [ 87%] Building C object src/bin/jp2/CMakeFiles/opj_dump.dir/convertpng.c.o [ 88%] Linking C executable ../../../bin/opj_dump [ 88%] Built target opj_dump Scanning dependencies of target opj_compress [ 89%] Building C object src/bin/jp2/CMakeFiles/opj_compress.dir/opj_compress.c.o [ 90%] Building C object src/bin/jp2/CMakeFiles/opj_compress.dir/convert.c.o [ 90%] Building C object src/bin/jp2/CMakeFiles/opj_compress.dir/convertbmp.c.o [ 91%] Building C object src/bin/jp2/CMakeFiles/opj_compress.dir/index.c.o [ 92%] Building C object src/bin/jp2/CMakeFiles/opj_compress.dir/__/common/color.c.o [ 92%] Building C object src/bin/jp2/CMakeFiles/opj_compress.dir/__/common/opj_getopt.c.o [ 93%] Building C object src/bin/jp2/CMakeFiles/opj_compress.dir/converttif.c.o [ 93%] Building C object src/bin/jp2/CMakeFiles/opj_compress.dir/convertpng.c.o [ 94%] Linking C executable ../../../bin/opj_compress [ 94%] Built target opj_compress Scanning dependencies of target opj_decompress [ 95%] Building C object src/bin/jp2/CMakeFiles/opj_decompress.dir/opj_decompress.c.o [ 95%] Building C object src/bin/jp2/CMakeFiles/opj_decompress.dir/convert.c.o [ 96%] Building C object src/bin/jp2/CMakeFiles/opj_decompress.dir/convertbmp.c.o [ 97%] Building C object src/bin/jp2/CMakeFiles/opj_decompress.dir/index.c.o [ 97%] Building C object src/bin/jp2/CMakeFiles/opj_decompress.dir/__/common/color.c.o [ 98%] Building C object src/bin/jp2/CMakeFiles/opj_decompress.dir/__/common/opj_getopt.c.o [ 99%] Building C object src/bin/jp2/CMakeFiles/opj_decompress.dir/converttif.c.o [ 99%] Building C object src/bin/jp2/CMakeFiles/opj_decompress.dir/convertpng.c.o [100%] Linking C executable ../../../bin/opj_decompress [100%] Built target opj_decompress由上面过程可看出每个编译目标(Built target)所依赖的文件由上一个目标(如果上一个目标由的话)生成后以及该目标生成前的文件组成如生成libopenjp2.soBuilt target openjp的文件是Built target openjp2_static之后以及Built target openjp之前的文件 [ 14%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/thread.c.o [ 15%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/bio.c.o [ 16%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/cio.c.o [ 16%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/dwt.c.o [ 17%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/event.c.o [ 18%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/ht_dec.c.o [ 18%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/image.c.o [ 19%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/invert.c.o [ 20%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/j2k.c.o [ 20%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/jp2.c.o [ 21%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/mct.c.o [ 22%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/mqc.c.o [ 22%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/openjpeg.c.o [ 23%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/opj_clock.c.o [ 23%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/pi.c.o [ 24%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/t1.c.o [ 25%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/t2.c.o [ 25%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/tcd.c.o [ 26%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/tgt.c.o [ 27%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/function_list.c.o [ 27%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/opj_malloc.c.o [ 28%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/sparse_array.c.o因此生成libopenjpeg.so的源文件我们就可以这样写 set(SHARED_LIB_SRC ${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/thread.c${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/bio.c${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/cio.c${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/dwt.c${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/event.c${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/ht_dec.c${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/image.c${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/invert.c${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/j2k.c${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/jp2.c${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/mct.c${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/mqc.c${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/openjpeg.c${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/opj_clock.c${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/pi.c${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/t1.c${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/t2.c${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/tcd.c${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/tgt.c${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/function_list.c${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/opj_malloc.c${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/sparse_array.c)其中CMAKE_CURRENT_SOURCE_DIR是代表当前CMakeLists.txt文件所在的路径。 目标文件生成 这里我们调用add_library生成一个目标文件libopenjpeg_shared.so其依赖上面分析的源码share_lib_src add_library(openjp2 SHARED ${SHARED_LIB_SRC})添加其他四方库依赖 如果三方库有对其他四方库依赖的话需要通过target_link_libraries()方法添加对应的依赖。如在工程CPP目录下的CMakeLists.txt文件中的: target_link_libraries(entry PUBLIC libace_napi.z.so openjg2) # libace_napi.z.so-系统napi库, openjg2-依赖的openjpeg库完整的CMakeLists.txt # the minimum version of CMake. cmake_minimum_required(VERSION 3.4.1) set(CMAKE_CXX_STANDARD 17) project(openjpeg)set(OPJ_HAVE_STDINT_H TRUE) set(OPJ_HAVE_INTTYPES_H TRUE) set(OPENJPEG_VERSION_MAJOR 2) set(OPENJPEG_VERSION_MINOR 5) set(OPENJPEG_VERSION_BUILD 0) set(OPENJPEG_VERSION${OPENJPEG_VERSION_MAJOR}.${OPENJPEG_VERSION_MINOR}.${OPENJPEG_VERSION_BUILD}) set(PACKAGE_VERSION${OPENJPEG_VERSION_MAJOR}.${OPENJPEG_VERSION_MINOR}.${OPENJPEG_VERSION_BUILD})configure_file(${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/opj_config.h.cmake.in${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/opj_config.hONLY)configure_file(${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/opj_config_private.h.cmake.in${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/opj_config_private.hONLY)add_definitions(-DOPJ_HAVE_PNG_H0 -DOPJ_HAVE_TIFF_H1 -DOPJ_HAVE_LCMS2_H1) set(INCLUDE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2) set(SHARED_LIB_SRC ${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/thread.c${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/bio.c${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/cio.c${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/dwt.c${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/event.c${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/ht_dec.c${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/image.c${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/invert.c${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/j2k.c${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/jp2.c${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/mct.c${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/mqc.c${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/openjpeg.c${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/opj_clock.c${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/pi.c${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/t1.c${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/t2.c${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/tcd.c${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/tgt.c${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/function_list.c${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/opj_malloc.c${CMAKE_CURRENT_SOURCE_DIR}/src/lib/openjp2/sparse_array.c)add_library(openjp2 SHARED ${SHARED_LIB_SRC}) target_include_directories(openjp2 PRIVATE ${INCLUDE_DIR})加入编译构建 原生库源码准备完后我们需要将库加入到工程的编译构建中。在工程目录CPP下的CMakeLists.txt文件中通过add_subdirectory将openjpeg加入到编译中并通过target_link_libraries添加对openjpeg的链接如下图 特别说明 如果使用原生库的CMakeLists文件编译时会提示添加目标时需要重新更改目标路径 此时我们就需要在顶层目录的CMakeLists.txt文件中添加 set(CMAKE_BUILD_WITH_INSTALL_RPATH TRUE)到此我们的三方库适配已经完成并可以正常编译成功。 三方库napi接口开发 三方库napi的接口一般是由需求方提供的对于无需求或需要自己定义接口的我们可以根据三方库对外导出的API接口进行封装或是根据原生库的测试用例对外封装测试接口。本文中我们已封装2个openjpeg测试接口为例详细说明napi接口开发的具体流程。 定义napi接口 根据原生库的测试用例我们封装2个测试用例接口 typedef struct {int comps_num; // the number of components of the image.int comps_prec; // number of bits per component per pixelint img_width; // the image widthint img_height; // the image heightint title_width; // width of tileint title_height; // height of titleint irreversible; // 1 : use the irreversible DWT 9-7// 0 : use lossless compression (default)int cblockw_init; // initial code block width, default to 64int cblockh_init; // initial code block height, default to 64int numresolution; // number of resolutionsint offsetx; // x component offset compared to the whole imageint offsety; // y component offset compared to the whole imageint is_rand; // Whether to generate data randomlychar file[256]; // output filename } J2K_Info;int OpenjpegCompress(const char *input_file, char *output_file) # 图片压缩成J2K格式 int openjpeg_create_j2k(J2K_Info *info) # 创建一张J2K格式图片注册接口 napi_property_descriptor desc[] {{openjpeg_compress, nullptr, OpenjpegCompress, nullptr, nullptr,nullptr, napi_default, nullptr},{openjpeg_create_j2k, nullptr, OpenjpegCreateJ2K , nullptr, nullptr,nullptr, napi_default, nullptr}};接口实现 openjpeg_compress接口的实现 static napi_value OpenjpegCompressMethod(napi_env env, napi_callback_info info) {napi_value result nullptr;napi_get_undefined(env, result);napi_value value;size_t argc 2;napi_value args[2];size_t size;char input_file[256] {0};char output_file[256] {0};// 获取参数if (napi_get_cb_info(env, info, argc, args, nullptr, nullptr) ! napi_ok) {return result;}// js类型转换成C/C类型if (napi_get_value_string_utf8(env, args[0], input_file, sizeof(input_file),size) ! napi_ok) {return result;}// js类型转换成C/C类型if (napi_get_value_string_utf8(env, args[1], output_file, sizeof(output_file),size) ! napi_ok) {return result;}// 封装一个通过调用openjpeg接口实现编码的接口// 三方库实现调用的业务逻辑接口if (OpenjpegCompress(input_file, output_file) ! 0) {return result;}// 创建返回的js类型参数if (napi_create_int64(env, 0, result) ! napi_ok) {std::cout napi_create_int64 std::endl;}// 返回最终结果。return result; }openjpeg_create_j2k接口的实现 static napi_value OpenjpegCreateJ2K(napi_env env, napi_callback_info info) {napi_value result nullptr;napi_get_undefined(env, result);napi_value value;size_t argc 1;J2K_Info j2kInfo;// 获取参数if (napi_get_cb_info(env, info, argc, value, nullptr, nullptr) ! napi_ok) {return result;}// 解析参数if (OpenjpegGetJ2kInfo(env, value, j2kInfo) 0) {return result;}// 封装一个通过调用openjpeg接口实现创建J2K文件的接口// 三方库实现调用的业务逻辑接口if (OpenjpegCreateJ2K(j2kInfo) 0) {return result;}if (napi_create_int64(env, 0, result) ! napi_ok) {std::cout napi_create_int64 std::endl;}return result; }解析参数接口的实现 static int OpenjpegGetJ2kInfo(napi_env env, napi_value value, J2K_Info *info) {if (info nullptr) {return -1;}if(GetObjectPropetry(env, value,output_file, STRING, info-file) ! napi_ok) {return -1;}if (GetObjectPropetry(env, value,comps_prec, NUMBER, info-comps_prec) !napi_ok) {return -1;}if (GetObjectPropetry(env, value,img_width, NUMBER, info-img_width) !napi_ok) {return -1;}if (GetObjectPropetry(env, value,img_height, NUMBER, info-img_height) !napi_ok) {return -1;}if (GetObjectPropetry(env, value,title_width, NUMBER, info-title_width) !napi_ok) {return -1;}if (GetObjectPropetry(env, value,title_height, NUMBER, info-title_height) !napi_ok) {return -1;}if (GetObjectPropetry(env, value,irreversible, NUMBER, info-irreversible) !napi_ok) {return -1;}GetObjectPropetry(env, value,cblockw_init, NUMBER, info-cblockw_init);GetObjectPropetry(env, value,cblockh_init, NUMBER, info-cblockh_init);GetObjectPropetry(env, value,numresolution, NUMBER, info-numresolution);GetObjectPropetry(env, value,offsetx, NUMBER, info-offsetx);GetObjectPropetry(env, value,offsety, NUMBER, info-offsety);GetObjectPropetry(env, value,is_rand, BOOLEAN, info-is_rand);return 0; }由上代码可以看出OpenjpegGetJ2kInfo接扣调用了一个封装的接口GetObjectPropetry该接口实现了通过调用napi的接口获取对应的数据 static int GetObjectPropetry(napi_env env, napi_value object, std::string key, int keyType, void *retValue) {napi_value property nullptr;napi_value result nullptr;bool flag false;int ret -1;// 通过字符串获取napi_value对象if (napi_create_string_utf8(env, key.c_str(), strlen(key.c_str()), property)! napi_ok) {return ret;}// 判断该字符串是否对应由属性值if (napi_has_property(env, object, property, flag) ! napi_ok flag true) {return ret;}// 获取字符串对应的属性值if (napi_get_property(env, object, property, result) ! napi_ok) {return ret;}if (keyType NUMBER) {int64_t value 0;// JS数据类型转换成C/C的int数据类型if (napi_get_value_int64(env, result, value) ! napi_ok) {return ret;}*(int *)retValue value;ret 0;} else if (keyType BOOLEAN) {bool value false;// JS数据类型转换成C/C 的bool数据类型if (napi_get_value_bool(env, result, value) ! napi_ok) {return ret;}*(int *)retValue (value true ? 1 : 0);}else if (keyType STRING) {size_t s 0;char buf[256] {0};// JS数据类型转换成C/C的string数据类型if (napi_get_value_string_utf8(env, result, buf, sizeof(buf), s) !napi_ok) {return ret;}strncpy((char *)retValue, buf, strlen(buf));ret 0;}return 0; }应用调用napi接口 应用申明接口 在确定需要封装的接口后我们需要将这些接口定义在index.d.ts文件中(路径entry/src/main/cpp/types/libentry/index.d.ts) export const openjpeg_compress: (srcName:string, desName:string) number; interface openjpegOption{comps_num:number // the number of components of the image.comps_prec:number // number of bits per component per pixelimg_width:number // the image widthimg_height:number // the image heighttitle_width:number // width of tiletitle_height:number // height of titleirreversible:number // 1 : use the irreversible DWT 9-7, // 0 : use lossless compression (default)output_file:string // output filenamecblockw_init?:number // initial code block width, default to 64cblockh_init?:number // initial code block height, default to 64numresolution?:number // number of resolutionsoffsetx?:number // x component offset compared to the whole imageoffsety?:number // y component offset compared to the whole imageis_rand?:boolean // Whether to generate data randomly } export const openjpeg_create_j2k: (option:openjpegOption) number应用调用接口 在ets工程中创建2个按钮并通过按钮调用相关的接口具体代码如下 Button(this.buttonTxt0) .fontSize(50) .margin({top:30}) .fontWeight(FontWeight.Normal) .onClick(() {testNapi.openjpeg_compress(this.dir test_pic.bmp, this.dir result.j2k) }) Button(this.buttonTxt1) .fontSize(50) .margin({top:30}) .fontWeight(FontWeight.Normal) .onClick(() {testNapi.openjpeg_create_j2k({comps_num:3,comps_prec:8,img_width:2000,img_height:2000,title_width:1000,title_height:1000,irreversible:1, output_file:this.dir newImage.j2k}) })为了能让大家更好的学习鸿蒙HarmonyOS NEXT开发技术这边特意整理了《鸿蒙开发学习手册》共计890页希望对大家有所帮助https://qr21.cn/FV7h05 《鸿蒙开发学习手册》 如何快速入门https://qr21.cn/FV7h05 基本概念构建第一个ArkTS应用…… 开发基础知识https://qr21.cn/FV7h05 应用基础知识配置文件应用数据管理应用安全管理应用隐私保护三方应用调用管控机制资源分类与访问学习ArkTS语言…… 基于ArkTS 开发https://qr21.cn/FV7h05 Ability开发UI开发公共事件与通知窗口管理媒体安全网络与链接电话服务数据管理后台任务(Background Task)管理设备管理设备使用信息统计DFX国际化开发折叠屏系列…… 鸿蒙开发面试真题含参考答案https://qr18.cn/F781PH 鸿蒙开发面试大盘集篇共计319页https://qr18.cn/F781PH 1.项目开发必备面试题 2.性能优化方向 3.架构方向 4.鸿蒙开发系统底层方向 5.鸿蒙音视频开发方向 6.鸿蒙车载开发方向 7.鸿蒙南向开发方向