Open Source Computer Vision Library https://opencv.org/
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#!/usr/bin/env python
import os, sys, subprocess, argparse, shutil, glob, re, multiprocessing
import logging as log
SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
class Fail(Exception):
def __init__(self, text=None):
self.t = text
def __str__(self):
return "ERROR" if self.t is None else self.t
def execute(cmd, shell=False):
try:
log.info("Executing: %s" % cmd)
env = os.environ.copy()
env['VERBOSE'] = '1'
retcode = subprocess.call(cmd, shell=shell, env=env)
if retcode < 0:
raise Fail("Child was terminated by signal: %s" % -retcode)
elif retcode > 0:
raise Fail("Child returned: %s" % retcode)
except OSError as e:
raise Fail("Execution failed: %d / %s" % (e.errno, e.strerror))
def rm_one(d):
d = os.path.abspath(d)
if os.path.exists(d):
if os.path.isdir(d):
log.info("Removing dir: %s", d)
shutil.rmtree(d)
elif os.path.isfile(d):
log.info("Removing file: %s", d)
os.remove(d)
def check_dir(d, create=False, clean=False):
d = os.path.abspath(d)
log.info("Check dir %s (create: %s, clean: %s)", d, create, clean)
if os.path.exists(d):
if not os.path.isdir(d):
raise Fail("Not a directory: %s" % d)
if clean:
for x in glob.glob(os.path.join(d, "*")):
rm_one(x)
else:
if create:
os.makedirs(d)
return d
def check_file(d):
d = os.path.abspath(d)
if os.path.exists(d):
if os.path.isfile(d):
return True
else:
return False
return False
def find_file(name, path):
for root, dirs, files in os.walk(path):
if name in files:
return os.path.join(root, name)
class Builder:
def __init__(self, options):
self.options = options
self.build_dir = check_dir(options.build_dir, create=True)
self.opencv_dir = check_dir(options.opencv_dir)
print('-----------------------------------------------------------')
print('options.opencv_dir:', options.opencv_dir)
self.emscripten_dir = check_dir(options.emscripten_dir)
def get_toolchain_file(self):
return os.path.join(self.emscripten_dir, "cmake", "Modules", "Platform", "Emscripten.cmake")
def clean_build_dir(self):
for d in ["CMakeCache.txt", "CMakeFiles/", "bin/", "libs/", "lib/", "modules"]:
rm_one(d)
def get_cmake_cmd(self):
cmd = [
"cmake",
"-DPYTHON_DEFAULT_EXECUTABLE=%s" % sys.executable,
"-DENABLE_PIC=FALSE", # To workaround emscripten upstream backend issue https://github.com/emscripten-core/emscripten/issues/8761
"-DCMAKE_BUILD_TYPE=Release",
"-DCPU_BASELINE=''",
"-DCMAKE_INSTALL_PREFIX=/usr/local",
"-DCPU_DISPATCH=''",
"-DCV_TRACE=OFF",
"-DBUILD_SHARED_LIBS=OFF",
"-DWITH_1394=OFF",
"-DWITH_ADE=OFF",
"-DWITH_VTK=OFF",
"-DWITH_EIGEN=OFF",
"-DWITH_FFMPEG=OFF",
"-DWITH_GSTREAMER=OFF",
"-DWITH_GTK=OFF",
"-DWITH_GTK_2_X=OFF",
"-DWITH_IPP=OFF",
"-DWITH_JASPER=OFF",
"-DWITH_JPEG=OFF",
"-DWITH_WEBP=OFF",
"-DWITH_OPENEXR=OFF",
"-DWITH_OPENGL=OFF",
"-DWITH_OPENVX=OFF",
"-DWITH_OPENNI=OFF",
"-DWITH_OPENNI2=OFF",
"-DWITH_PNG=OFF",
"-DWITH_TBB=OFF",
"-DWITH_TIFF=OFF",
"-DWITH_V4L=OFF",
"-DWITH_OPENCL=OFF",
"-DWITH_OPENCL_SVM=OFF",
"-DWITH_OPENCLAMDFFT=OFF",
"-DWITH_OPENCLAMDBLAS=OFF",
"-DWITH_GPHOTO2=OFF",
"-DWITH_LAPACK=OFF",
"-DWITH_ITT=OFF",
"-DWITH_QUIRC=OFF",
"-DBUILD_ZLIB=ON",
"-DBUILD_opencv_apps=OFF",
"-DBUILD_opencv_calib3d=ON",
"-DBUILD_opencv_dnn=ON",
"-DBUILD_opencv_features2d=ON",
"-DBUILD_opencv_flann=ON", # No bindings provided. This module is used as a dependency for other modules.
"-DBUILD_opencv_gapi=OFF",
"-DBUILD_opencv_ml=OFF",
"-DBUILD_opencv_photo=ON",
"-DBUILD_opencv_imgcodecs=OFF",
"-DBUILD_opencv_shape=OFF",
"-DBUILD_opencv_videoio=OFF",
"-DBUILD_opencv_videostab=OFF",
"-DBUILD_opencv_highgui=OFF",
"-DBUILD_opencv_superres=OFF",
"-DBUILD_opencv_stitching=OFF",
"-DBUILD_opencv_java=OFF",
"-DBUILD_opencv_js=ON",
"-DBUILD_opencv_python2=OFF",
"-DBUILD_opencv_python3=OFF",
"-DBUILD_EXAMPLES=ON",
"-DBUILD_PACKAGE=OFF",
"-DBUILD_TESTS=ON",
"-DBUILD_PERF_TESTS=ON"]
if self.options.cmake_option:
cmd += self.options.cmake_option
if not self.options.cmake_option or all(["-DCMAKE_TOOLCHAIN_FILE" not in opt for opt in self.options.cmake_option]):
cmd.append("-DCMAKE_TOOLCHAIN_FILE='%s'" % self.get_toolchain_file())
if self.options.build_doc:
cmd.append("-DBUILD_DOCS=ON")
else:
cmd.append("-DBUILD_DOCS=OFF")
if self.options.threads:
cmd.append("-DWITH_PTHREADS_PF=ON")
else:
cmd.append("-DWITH_PTHREADS_PF=OFF")
if self.options.simd:
cmd.append("-DCV_ENABLE_INTRINSICS=ON")
else:
cmd.append("-DCV_ENABLE_INTRINSICS=OFF")
if self.options.build_wasm_intrin_test:
cmd.append("-DBUILD_WASM_INTRIN_TESTS=ON")
else:
cmd.append("-DBUILD_WASM_INTRIN_TESTS=OFF")
if self.options.webnn:
cmd.append("-DWITH_WEBNN=ON")
flags = self.get_build_flags()
if flags:
cmd += ["-DCMAKE_C_FLAGS='%s'" % flags,
"-DCMAKE_CXX_FLAGS='%s'" % flags]
return cmd
def get_build_flags(self):
flags = ""
if self.options.build_wasm:
flags += "-s WASM=1 "
elif self.options.disable_wasm:
flags += "-s WASM=0 "
if not self.options.disable_single_file:
flags += "-s SINGLE_FILE=1 "
if self.options.threads:
flags += "-s USE_PTHREADS=1 -s PTHREAD_POOL_SIZE=4 "
else:
flags += "-s USE_PTHREADS=0 "
if self.options.enable_exception:
flags += "-s DISABLE_EXCEPTION_CATCHING=0 "
if self.options.simd:
flags += "-msimd128 "
if self.options.build_flags:
flags += self.options.build_flags + " "
if self.options.webnn:
flags += "-s USE_WEBNN=1 "
flags += "-s EXPORTED_FUNCTIONS=\"['_malloc', '_free']\""
return flags
def config(self):
cmd = self.get_cmake_cmd()
cmd.append(self.opencv_dir)
execute(cmd)
def build_opencvjs(self):
execute(["make", "-j", str(multiprocessing.cpu_count()), "opencv.js"])
def build_test(self):
execute(["make", "-j", str(multiprocessing.cpu_count()), "opencv_js_test"])
def build_perf(self):
execute(["make", "-j", str(multiprocessing.cpu_count()), "opencv_js_perf"])
def build_doc(self):
execute(["make", "-j", str(multiprocessing.cpu_count()), "doxygen"])
def build_loader(self):
execute(["make", "-j", str(multiprocessing.cpu_count()), "opencv_js_loader"])
#===================================================================================================
if __name__ == "__main__":
log.basicConfig(format='%(message)s', level=log.DEBUG)
opencv_dir = os.path.abspath(os.path.join(SCRIPT_DIR, '../..'))
emscripten_dir = None
if "EMSDK" in os.environ:
emscripten_dir = os.path.join(os.environ["EMSDK"], "upstream", "emscripten")
elif "EMSCRIPTEN" in os.environ:
emscripten_dir = os.environ["EMSCRIPTEN"]
else:
log.warning("EMSCRIPTEN/EMSDK environment variable is not available. Please properly activate Emscripten SDK and consider using 'emcmake' launcher")
parser = argparse.ArgumentParser(description='Build OpenCV.js by Emscripten')
parser.add_argument("build_dir", help="Building directory (and output)")
parser.add_argument('--opencv_dir', default=opencv_dir, help='Opencv source directory (default is "../.." relative to script location)')
parser.add_argument('--emscripten_dir', default=emscripten_dir, help="Path to Emscripten to use for build (deprecated in favor of 'emcmake' launcher)")
parser.add_argument('--build_wasm', action="store_true", help="Build OpenCV.js in WebAssembly format")
parser.add_argument('--disable_wasm', action="store_true", help="Build OpenCV.js in Asm.js format")
parser.add_argument('--disable_single_file', action="store_true", help="Do not merge JavaScript and WebAssembly into one single file")
parser.add_argument('--threads', action="store_true", help="Build OpenCV.js with threads optimization")
parser.add_argument('--simd', action="store_true", help="Build OpenCV.js with SIMD optimization")
parser.add_argument('--build_test', action="store_true", help="Build tests")
parser.add_argument('--build_perf', action="store_true", help="Build performance tests")
parser.add_argument('--build_doc', action="store_true", help="Build tutorials")
parser.add_argument('--build_loader', action="store_true", help="Build OpenCV.js loader")
parser.add_argument('--clean_build_dir', action="store_true", help="Clean build dir")
parser.add_argument('--skip_config', action="store_true", help="Skip cmake config")
parser.add_argument('--config_only', action="store_true", help="Only do cmake config")
parser.add_argument('--enable_exception', action="store_true", help="Enable exception handling")
# Use flag --cmake option="-D...=ON" only for one argument, if you would add more changes write new cmake_option flags
parser.add_argument('--cmake_option', action='append', help="Append CMake options")
# Use flag --build_flags="-s USE_PTHREADS=0 -Os" for one and more arguments as in the example
parser.add_argument('--build_flags', help="Append Emscripten build options")
parser.add_argument('--build_wasm_intrin_test', default=False, action="store_true", help="Build WASM intrin tests")
# Write a path to modify file like argument of this flag
parser.add_argument('--config', default=os.path.join(os.path.dirname(os.path.abspath(__file__)), 'opencv_js.config.py'),
help="Specify configuration file with own list of exported into JS functions")
parser.add_argument('--webnn', action="store_true", help="Enable WebNN Backend")
transformed_args = ["--cmake_option=%s".format(arg) if arg[:2] == "-D" else arg for arg in sys.argv[1:]]
args = parser.parse_args(transformed_args)
log.debug("Args: %s", args)
os.environ["OPENCV_JS_WHITELIST"] = os.path.abspath(args.config)
if 'EMMAKEN_JUST_CONFIGURE' in os.environ:
del os.environ['EMMAKEN_JUST_CONFIGURE'] # avoid linker errors with NODERAWFS message then using 'emcmake' launcher
if args.emscripten_dir is None:
log.error("Cannot get Emscripten path, please use 'emcmake' launcher or specify it either by EMSCRIPTEN/EMSDK environment variable or --emscripten_dir option.")
sys.exit(-1)
builder = Builder(args)
os.chdir(builder.build_dir)
if args.clean_build_dir:
log.info("=====")
log.info("===== Clean build dir %s", builder.build_dir)
log.info("=====")
builder.clean_build_dir()
if not args.skip_config:
target = "default target"
if args.build_wasm:
target = "wasm"
elif args.disable_wasm:
target = "asm.js"
log.info("=====")
log.info("===== Config OpenCV.js build for %s" % target)
log.info("=====")
builder.config()
if args.config_only:
sys.exit(0)
log.info("=====")
log.info("===== Building OpenCV.js")
log.info("=====")
builder.build_opencvjs()
if args.build_test:
log.info("=====")
log.info("===== Building OpenCV.js tests")
log.info("=====")
builder.build_test()
if args.build_perf:
log.info("=====")
log.info("===== Building OpenCV.js performance tests")
log.info("=====")
builder.build_perf()
if args.build_doc:
log.info("=====")
log.info("===== Building OpenCV.js tutorials")
log.info("=====")
builder.build_doc()
if args.build_loader:
log.info("=====")
log.info("===== Building OpenCV.js loader")
log.info("=====")
builder.build_loader()
log.info("=====")
log.info("===== Build finished")
log.info("=====")
opencvjs_path = os.path.join(builder.build_dir, "bin", "opencv.js")
if check_file(opencvjs_path):
log.info("OpenCV.js location: %s", opencvjs_path)
if args.build_test:
opencvjs_test_path = os.path.join(builder.build_dir, "bin", "tests.html")
if check_file(opencvjs_test_path):
log.info("OpenCV.js tests location: %s", opencvjs_test_path)
if args.build_perf:
opencvjs_perf_path = os.path.join(builder.build_dir, "bin", "perf")
opencvjs_perf_base_path = os.path.join(builder.build_dir, "bin", "perf", "base.js")
if check_file(opencvjs_perf_base_path):
log.info("OpenCV.js performance tests location: %s", opencvjs_perf_path)
if args.build_doc:
opencvjs_tutorial_path = find_file("tutorial_js_root.html", os.path.join(builder.build_dir, "doc", "doxygen", "html"))
if check_file(opencvjs_tutorial_path):
log.info("OpenCV.js tutorials location: %s", opencvjs_tutorial_path)
if args.build_loader:
opencvjs_loader_path = os.path.join(builder.build_dir, "bin", "loader.js")
if check_file(opencvjs_loader_path):
log.info("OpenCV.js loader location: %s", opencvjs_loader_path)