from conan import ConanFile from conan.errors import ConanInvalidConfiguration from conan.tools.apple import is_apple_os from conan.tools.cmake import CMake, CMakeToolchain, CMakeDeps, cmake_layout from conan.tools.files import apply_conandata_patches, copy, export_conandata_patches, get, rm, rmdir from conan.tools.microsoft import is_msvc from conan.tools.scm import Version import os required_conan_version = ">=1.53.0" class LibpngConan(ConanFile): name = "libpng" description = "libpng is the official PNG file format reference library." url = "https://github.com/conan-io/conan-center-index" homepage = "http://www.libpng.org" license = "libpng-2.0" topics = ("png", "graphics", "image") settings = "os", "arch", "compiler", "build_type" options = { "shared": [True, False], "fPIC": [True, False], "neon": [True, "check", False], "msa": [True, False], "sse": [True, False], "vsx": [True, False], "api_prefix": ["ANY"], } default_options = { "shared": False, "fPIC": True, "neon": True, "msa": True, "sse": True, "vsx": True, "api_prefix": "", } @property def _is_clang_cl(self): return self.settings.os == "Windows" and self.settings.compiler == "clang" and \ self.settings.compiler.get_safe("runtime") @property def _has_neon_support(self): return "arm" in self.settings.arch @property def _has_msa_support(self): return "mips" in self.settings.arch @property def _has_sse_support(self): return self.settings.arch in ["x86", "x86_64"] @property def _has_vsx_support(self): return "ppc" in self.settings.arch @property def _neon_msa_sse_vsx_mapping(self): return { "True": "on", "False": "off", "check": "check", } def export_sources(self): export_conandata_patches(self) copy(self, "conan_cmake_project_include.cmake", self.recipe_folder, os.path.join(self.export_sources_folder, "src")) def config_options(self): if self.settings.os == "Windows": del self.options.fPIC if not self._has_neon_support: del self.options.neon if not self._has_msa_support: del self.options.msa if not self._has_sse_support: del self.options.sse if not self._has_vsx_support: del self.options.vsx def configure(self): if self.options.shared: self.options.rm_safe("fPIC") self.settings.rm_safe("compiler.libcxx") self.settings.rm_safe("compiler.cppstd") def layout(self): cmake_layout(self, src_folder="src") def requirements(self): self.requires("zlib/[>=1.2.11 <2]") def validate(self): if Version(self.version) < "1.6" and self.settings.arch == "armv8" and is_apple_os(self): raise ConanInvalidConfiguration(f"{self.ref} currently does not building for {self.settings.os} {self.settings.arch}. Contributions are welcomed") def source(self): get(self, **self.conan_data["sources"][self.version], strip_root=True) def generate(self): tc = CMakeToolchain(self) tc.cache_variables["PNG_TESTS"] = False tc.cache_variables["PNG_SHARED"] = self.options.shared tc.cache_variables["PNG_STATIC"] = not self.options.shared tc.cache_variables["PNG_DEBUG"] = self.settings.build_type == "Debug" tc.cache_variables["PNG_PREFIX"] = self.options.api_prefix if Version(self.version) < "1.6.38": tc.cache_variables["CMAKE_PROJECT_libpng_INCLUDE"] = os.path.join(self.source_folder, "conan_cmake_project_include.cmake") if self._has_neon_support: tc.variables["PNG_ARM_NEON"] = self._neon_msa_sse_vsx_mapping[str(self.options.neon)] if self._has_msa_support: tc.variables["PNG_MIPS_MSA"] = self._neon_msa_sse_vsx_mapping[str(self.options.msa)] if self._has_sse_support: tc.variables["PNG_INTEL_SSE"] = self._neon_msa_sse_vsx_mapping[str(self.options.sse)] if self._has_vsx_support: tc.variables["PNG_POWERPC_VSX"] = self._neon_msa_sse_vsx_mapping[str(self.options.vsx)] if Version(self.version) >= "1.6.41": tc.variables["PNG_FRAMEWORK"] = False # changed from False to True by default in PNG 1.6.41 tc.variables["PNG_TOOLS"] = False elif Version(self.version) >= "1.6.38": tc.variables["PNG_EXECUTABLES"] = False tc.cache_variables["CMAKE_MACOSX_BUNDLE"] = False tc.generate() tc = CMakeDeps(self) tc.generate() def _patch_sources(self): apply_conandata_patches(self) def build(self): self._patch_sources() cmake = CMake(self) cmake.configure() cmake.build() def package(self): copy(self, "LICENSE", src=self.source_folder, dst=os.path.join(self.package_folder, "licenses")) cmake = CMake(self) cmake.install() if self.options.shared: rm(self, "*[!.dll]", os.path.join(self.package_folder, "bin")) else: rmdir(self, os.path.join(self.package_folder, "bin")) rmdir(self, os.path.join(self.package_folder, "lib", "libpng")) rmdir(self, os.path.join(self.package_folder, "lib", "pkgconfig")) rmdir(self, os.path.join(self.package_folder, "share")) rm(self, "*.cmake", os.path.join(self.package_folder, "lib", "cmake", "PNG")) def package_info(self): major_min_version = f"{Version(self.version).major}{Version(self.version).minor}" self.cpp_info.set_property("cmake_find_mode", "both") self.cpp_info.set_property("cmake_file_name", "PNG") self.cpp_info.set_property("cmake_target_name", "PNG::PNG") self.cpp_info.set_property("pkg_config_name", "libpng") self.cpp_info.set_property("pkg_config_aliases", [f"libpng{major_min_version}"]) prefix = "lib" if (is_msvc(self) or self._is_clang_cl) else "" suffix = major_min_version if self.settings.os == "Windows" else "" if is_msvc(self) or self._is_clang_cl: suffix += "_static" if not self.options.shared else "" suffix += "d" if self.settings.os == "Windows" and self.settings.build_type == "Debug" else "" self.cpp_info.libs = [f"{prefix}png{suffix}"] if self.settings.os in ["Linux", "Android", "FreeBSD", "SunOS", "AIX"]: self.cpp_info.system_libs.append("m") # TODO: Remove after Conan 2.0 self.cpp_info.names["cmake_find_package"] = "PNG" self.cpp_info.names["cmake_find_package_multi"] = "PNG"