Add support for Apple framework builds

.github/workflows/main.yml

@@ -96,7 +96,7 @@ jobs:
           compiler: xcode
           compiler_version: "15.4"
           python: None
-          cmake_config: -DMATERIALX_BUILD_IOS=ON -DCMAKE_OSX_SYSROOT=`xcrun --sdk iphoneos --show-sdk-path` -DCMAKE_OSX_ARCHITECTURES=arm64
+          cmake_config: -DCMAKE_SYSTEM_NAME=iOS -DCMAKE_OSX_SYSROOT=`xcrun --sdk iphoneos --show-sdk-path` -DCMAKE_OSX_ARCHITECTURES=arm64
 
         - name: Windows_VS2019_Win32_Python37
           os: windows-2019

CMakeLists.txt

@@ -59,10 +59,27 @@ option(MATERIALX_COVERAGE_ANALYSIS "Build MaterialX libraries with coverage anal
 option(MATERIALX_DYNAMIC_ANALYSIS "Build MaterialX libraries with dynamic analysis on supporting platforms." OFF)
 option(MATERIALX_OSL_LEGACY_CLOSURES "Build OSL shader generation supporting the legacy OSL closures." OFF)
 
-option(MATERIALX_BUILD_IOS "Build MaterialX for iOS." OFF)
+option(MATERIALX_BUILD_IOS "Build MaterialX for iOS. (Deprecated. Set CMAKE_SYSTEM_NAME instead)" OFF)
+set(MATERIALX_BUILD_APPLE_EMBEDDED OFF)
 if (MATERIALX_BUILD_IOS)
+    MESSAGE(WARNING "The MATERIALX_BUILD_IOS is deprecated. Set the CMAKE_SYSTEM_NAME to the platform instead")
     set(CMAKE_SYSTEM_NAME iOS)
-    add_definitions(-DTARGET_OS_IOS=1)
+endif()
+
+# Cross Compilation detection as defined in CMake docs
+# https://cmake.org/cmake/help/latest/manual/cmake-toolchains.7.html#cross-compiling-for-ios-tvos-visionos-or-watchos
+# Note: All these SDKs may not be supported by MaterialX
+set(__build_apple_framework OFF)
+if (CMAKE_SYSTEM_NAME MATCHES "iOS"
+        OR CMAKE_SYSTEM_NAME MATCHES "tvOS"
+        OR CMAKE_SYSTEM_NAME MATCHES "visionOS"
+        OR CMAKE_SYSTEM_NAME MATCHES "watchOS")
+    set(MATERIALX_BUILD_APPLE_EMBEDDED ON)
+    set(__build_apple_framework ${MATERIALX_BUILD_SHARED_LIBS})
+    # TARGET_OS_IPHONE refers to all IPHONE derived platforms
+    # https://chaosinmotion.com/2021/08/02/things-to-remember-compiler-conditionals-for-macos-ios-etc/
+    # This should be auto-defined, but leaving it in here because it was historically defined
+    add_definitions(-DTARGET_OS_IPHONE=1)
     set(MATERIALX_BUILD_MONOLITHIC ON)
     set(MATERIALX_BUILD_PYTHON OFF)
     set(MATERIALX_BUILD_VIEWER OFF)
@@ -73,6 +90,18 @@ if (MATERIALX_BUILD_IOS)
     set(MATERIALX_BUILD_TESTS OFF)
 endif()
 
+set(CMAKE_XCODE_ATTRIBUTE_CODE_SIGN_IDENTITY "-" CACHE STRING "The Codesigning identity needed to sign compiled objects")
+option(MATERIALX_BUILD_APPLE_FRAMEWORK "Build MaterialX as an Apple Framework" ${__build_apple_framework})
+if (MATERIALX_BUILD_APPLE_FRAMEWORK)
+    add_definitions(-DBUILD_APPLE_FRAMEWORK)
+    set(MATERIALX_BUILD_MONOLITHIC ON)
+    set(MATERIALX_BUILD_PYTHON OFF)
+    set(MATERIALX_BUILD_VIEWER OFF)
+    set(MATERIALX_BUILD_GRAPH_EDITOR OFF)
+    set(MATERIALX_BUILD_TESTS OFF)
+    set(MATERIALX_BUILD_SHARED_LIBS ON)
+endif()
+
 if (MATERIALX_BUILD_JS)
     set(MATERIALX_BUILD_RENDER OFF)
     set(MATERIALX_BUILD_TESTS OFF)
@@ -163,6 +192,7 @@ mark_as_advanced(MATERIALX_INSTALL_STDLIB_PATH)
 mark_as_advanced(MATERIALX_BUILD_JS)
 mark_as_advanced(MATERIALX_EMSDK_PATH)
 mark_as_advanced(MATERIALX_BUILD_IOS)
+mark_as_advanced(MATERIALX_BUILD_APPLE_FRAMEWORK)
 if (MATERIALX_BUILD_GEN_MDL)
     mark_as_advanced(MATERIALX_MDLC_EXECUTABLE)
     mark_as_advanced(MATERIALX_MDL_RENDER_EXECUTABLE)
@@ -496,6 +526,24 @@ if (MATERIALX_BUILD_MONOLITHIC)
         # Note : we don't install the headers etc. here, and rely on each separate modules CMakeLists.txt
         # to do that installation, thus we respect the build options configuration, and only install
         # the headers for the modules we've built in to the monolithic build.
+
+        # Finally do the framework build if requested
+        # This uses a zsh script since zsh is guaranteed to exist on systems
+        if(MATERIALX_BUILD_APPLE_FRAMEWORK)
+            # Conform cmake formats to zsh expected formats
+            set(__embedded_build "false")
+            if (MATERIALX_BUILD_APPLE_EMBEDDED)
+                set(__embedded_build "true")
+            endif()
+
+            # Install the Info.plist and shell script
+            math(EXPR CFBUNDLEVERSION "${MATERIALX_MAJOR_VERSION} * 10000 + ${MATERIALX_MINOR_VERSION} * 100 + ${MATERIALX_BUILD_VERSION}")
+            configure_file(cmake/modules/Info.plist.in "${PROJECT_BINARY_DIR}/Info.plist" @ONLY)
+            configure_file(cmake/modules/AppleFrameworkBuild.zsh.in "${PROJECT_BINARY_DIR}/AppleFrameworkBuild.zsh" @ONLY)
+
+            # Run the shell script for the primary configuration
+            install(CODE "execute_process(COMMAND zsh ${PROJECT_BINARY_DIR}/AppleFrameworkBuild.zsh )")
+        endif()
     endif()
 endif()
 

cmake/modules/AppleFrameworkBuild.zsh.in

@@ -0,0 +1,113 @@
+#!/bin/zsh
+
+# Creates an Apple framework for the given platform type
+# documentation: https://developer.apple.com/documentation/bundleresources/placing_content_in_a_bundle
+#                https://developer.apple.com/library/archive/documentation/MacOSX/Conceptual/BPFrameworks/Concepts/FrameworkAnatomy.html
+echo "⌛️ Creating MaterialX.framework ..."
+
+# Variables are substituted by CMake
+CMAKE_INSTALL_PREFIX="@CMAKE_INSTALL_PREFIX@"
+PROJECT_BINARY_DIR="@PROJECT_BINARY_DIR@"
+
+FRAMEWORK_NAME="MaterialX"
+FRAMEWORK_DIR="${CMAKE_INSTALL_PREFIX}/frameworks/${FRAMEWORK_NAME}.framework"
+FRAMEWORK_LIBRARIES_DIR="${FRAMEWORK_DIR}/Libraries"
+FRAMEWORK_ROOT_LIBRARY_NAME="libMaterialX.@MATERIALX_LIBRARY_VERSION@.dylib"
+EMBEDDED_BUILD=@__embedded_build@
+FRAMEWORK_RESOURCES_DIR="${FRAMEWORK_DIR}"
+MATERIALX_SOURCE_LIBRARIES="${CMAKE_INSTALL_PREFIX}/libraries/"
+BUNDLE_IDENTIFIER="org.aswf.materialx"
+CODESIGN_ID="@CMAKE_XCODE_ATTRIBUTE_CODE_SIGN_IDENTITY@"
+OLD_RC_PATH="${CMAKE_INSTALL_PREFIX}/lib"
+
+function fix_linkage() {
+    readonly file=${1:?"A file path must be specified."}
+    readonly prepend="${FRAMEWORK_NAME}.framework/Libraries"
+    filename=$(basename ${file})
+    # First, change the install name. This corresponds to LC_ID_DYLIB.
+    install_name_tool -id "@rpath/${prepend}/${filename}" ${file}
+
+    parts=("${(@f)$(otool -l ${file})}")
+    for line in ${parts}; do
+      dylib_name=""
+      [[ $line =~ ' *name @rpath/(.*\.dylib)' ]] && dylib_name=$match[1]
+      if [ -n "${dylib_name}" ]; then
+        install_name_tool -change "@rpath/${dylib_name}" "@rpath/${prepend}/${dylib_name}" "${file}"
+      fi
+      if [[ $line == *"${OLD_RC_PATH}"* ]]; then
+        install_name_tool -delete_rpath ${OLD_RC_PATH} ${file}
+      fi
+    done
+
+    codesign -f -s ${CODESIGN_ID} ${file}
+}
+
+# Remove the existing directory if it exists
+if [ -d ${FRAMEWORK_DIR} ]; then
+  echo "Removing existing framework";
+  rm -Rf ${FRAMEWORK_DIR};
+fi
+
+# Create the parent directory
+echo "Creating Framework Directory: ${FRAMEWORK_DIR}"
+mkdir -p ${FRAMEWORK_DIR}
+
+if [ "$EMBEDDED_BUILD" = true ];then
+  FRAMEWORK_RESOURCES_DIR="${FRAMEWORK_DIR}/Resources"
+  FRAMEWORK_PLIST_LOCATION="${FRAMEWORK_DIR}/Info.plist"
+  FRAMEWORK_HEADERS_DIR="${FRAMEWORK_DIR}/Headers"
+  FRAMEWORK_LIB_PATH=""${FRAMEWORK_DIR}/${FRAMEWORK_NAME}""
+else
+  FRAMEWORK_RESOURCES_DIR="${FRAMEWORK_DIR}/Versions/A/Resources/"
+  FRAMEWORK_PLIST_LOCATION="${FRAMEWORK_DIR}/Versions/A/Resources/Info.plist"
+  FRAMEWORK_HEADERS_DIR="${FRAMEWORK_DIR}/Versions/A/Headers"
+  FRAMEWORK_LIB_PATH="${FRAMEWORK_DIR}/Versions/A/${FRAMEWORK_NAME}"
+fi
+
+echo "Creating Resources Root: ${FRAMEWORK_RESOURCES_DIR}"
+mkdir -p ${FRAMEWORK_RESOURCES_DIR}
+
+echo "Creating Headers Root: ${FRAMEWORK_HEADERS_DIR}"
+mkdir -p ${FRAMEWORK_HEADERS_DIR}
+
+# Copy the plist over
+echo "Copying files into ${FRAMEWORK_DIR}"
+ditto "${PROJECT_BINARY_DIR}/Info.plist" "${FRAMEWORK_PLIST_LOCATION}"
+
+# Copy the primary directories over
+ditto "${CMAKE_INSTALL_PREFIX}/include/" ${FRAMEWORK_HEADERS_DIR}
+ditto "${CMAKE_INSTALL_PREFIX}/libraries/" "${FRAMEWORK_RESOURCES_DIR}/libraries"
+ditto "${CMAKE_INSTALL_PREFIX}/resources" "${FRAMEWORK_RESOURCES_DIR}/render"
+
+cp "${CMAKE_INSTALL_PREFIX}/lib/${FRAMEWORK_ROOT_LIBRARY_NAME}" "${FRAMEWORK_LIB_PATH}"
+
+# Setup symlinks
+if [ "$EMBEDDED_BUILD" = false ];then
+  (cd "${FRAMEWORK_DIR}/Versions" && ln -s "A" "Current")
+  (cd ${FRAMEWORK_DIR} && ln -s "Versions/Current/Resources" "Resources")
+  (cd ${FRAMEWORK_DIR} && ln -s "Versions/Current/Headers" "Headers")
+  (cd ${FRAMEWORK_DIR} && ln -s "Versions/Current/${FRAMEWORK_NAME}" ${FRAMEWORK_NAME})
+fi
+
+# Fix the linkage on the primary dylib
+fix_linkage "${FRAMEWORK_DIR}/${FRAMEWORK_NAME}"
+install_name_tool -id "@rpath/${FRAMEWORK_NAME}.framework/${FRAMEWORK_NAME}" "${FRAMEWORK_DIR}/${FRAMEWORK_NAME}"
+install_name_tool -change "@rpath/${FRAMEWORK_NAME}.framework/Libraries/${FRAMEWORK_NAME}" "@rpath/${FRAMEWORK_NAME}.framework/${FRAMEWORK_NAME}" "${FRAMEWORK_DIR}/${FRAMEWORK_NAME}"
+
+# Frameworks require all includes to use the framework name as the prefix for automatic discovery
+echo "Modifying headers..."
+HEADER_SET=""
+for i in $(cd $FRAMEWORK_HEADERS_DIR && ls -d */ | cut -f1 -d'/');do
+  HEADER_SET+="${i}|"
+done;
+# Sed on macOS is POSIX compliant and so uses different args than GNU
+# Things to be aware of are [[:<:]] and [[:>:]] are for word boundaries and spaces are explicit literals
+INCLUDE_PATTERN="^# *include [\"|<]([[:<:]](${HEADER_SET::-1})[[:>:]].*)[\"|>].*$"
+find ${FRAMEWORK_HEADERS_DIR} -type f -name "*.h*" -print0 | xargs -0 sed -i "" -E "s,${INCLUDE_PATTERN},#include <${FRAMEWORK_NAME}/\1>,g"
+
+# Sign the final framework
+echo "Codesigning the framework..."
+set -e
+codesign --force --sign ${CODESIGN_ID} --generate-entitlement-der --identifier ${BUNDLE_IDENTIFIER} --verbose ${FRAMEWORK_DIR}
+
+echo "✅ Finished creating framework at ${FRAMEWORK_DIR}"

cmake/modules/Info.plist.in

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+    <key>CFBundleDevelopmentRegion</key>
+    <string>en</string>
+    <key>CFBundleExecutable</key>
+    <string>MaterialX</string>
+    <key>CFBundleIdentifier</key>
+    <string>org.aswf.materialx</string>
+    <key>CFBundleInfoDictionaryVersion</key>
+    <string>6.0</string>
+    <key>CFBundleName</key>
+    <string>MaterialX</string>
+    <key>CFBundlePackageType</key>
+    <string>FMWK</string>
+    <key>CFBundleShortVersionString</key>
+    <string>@MATERIALX_LIBRARY_VERSION@</string>
+    <key>CFBundleVersion</key>
+    <string>@CFBUNDLEVERSION@</string>
+    <key>CSResourcesFileMapped</key>
+    <true />
+</dict>
+</plist>

source/MaterialXFormat/Util.cpp

@@ -9,6 +9,10 @@
 #include <iostream>
 #include <sstream>
 
+#if defined(__APPLE__) && defined(BUILD_APPLE_FRAMEWORK)
+    #include <dlfcn.h>
+#endif
+
 MATERIALX_NAMESPACE_BEGIN
 
 string readFile(const FilePath& filePath)
@@ -226,15 +230,33 @@ FileSearchPath getDefaultDataSearchPath()
 {
     const FilePath REQUIRED_LIBRARY_FOLDER("libraries/targets");
     FilePath currentPath = FilePath::getModulePath();
+
+    FileSearchPath searchPath;
+    #if defined(BUILD_APPLE_FRAMEWORK)
+        const FilePath FRAMEWORK_RESOURCES("Resources");
+
+        Dl_info info;
+        if (dladdr(reinterpret_cast<void*>(&getDefaultDataSearchPath), &info))
+        {
+            FilePath path = FilePath(info.dli_fname);
+            if (!path.isEmpty())
+            {
+                path = path.getParentPath();
+                searchPath.append(path / FRAMEWORK_RESOURCES);
+            }
+        }
+    #endif
+
     while (!currentPath.isEmpty())
     {
         if ((currentPath / REQUIRED_LIBRARY_FOLDER).exists())
         {
-            return FileSearchPath(currentPath);
+            searchPath.append(FileSearchPath(currentPath));
+            break;
         }
         currentPath = currentPath.getParentPath();
     }
-    return FileSearchPath();
+    return searchPath;
 }
 
 MATERIALX_NAMESPACE_END

source/MaterialXRenderHw/CMakeLists.txt

@@ -3,7 +3,7 @@ file(GLOB materialx_source "${CMAKE_CURRENT_SOURCE_DIR}/*.cpp")
 file(GLOB materialx_headers "${CMAKE_CURRENT_SOURCE_DIR}/*.h*")
 
 if(APPLE)
-    if (NOT MATERIALX_BUILD_IOS)
+    if (NOT MATERIALX_BUILD_APPLE_EMBEDDED)
         find_library(COCOA_FRAMEWORK Cocoa)
     endif()
 elseif(UNIX)
@@ -31,7 +31,7 @@ if(APPLE)
             PUBLIC
             "-framework Foundation"
             "-framework Metal")
-    if (NOT MATERIALX_BUILD_IOS)
+    if (NOT MATERIALX_BUILD_APPLE_EMBEDDED)
         target_link_libraries(${TARGET_NAME}
                 PUBLIC
                 "-framework Cocoa"

source/MaterialXRenderHw/SimpleWindowIOS.cpp

@@ -5,7 +5,7 @@
 
 #if defined(__APPLE__)
 
-#ifdef TARGET_OS_IOS
+#ifdef TARGET_OS_IPHONE
 
 #include <MaterialXRenderHw/SimpleWindow.h>
 

source/MaterialXRenderHw/SimpleWindowMac.cpp

@@ -5,7 +5,7 @@
 
 #if defined(__APPLE__)
 
-#ifndef TARGET_OS_IOS
+#ifndef TARGET_OS_IPHONE
 
 #include <MaterialXRenderHw/SimpleWindow.h>
 #include <MaterialXRenderHw/WindowCocoaWrappers.h>

source/MaterialXRenderHw/WindowCocoaWrappers.m

@@ -5,7 +5,7 @@
 
 #if defined (__APPLE__)
 
-#ifndef TARGET_OS_IOS
+#ifndef TARGET_OS_IPHONE
 
 #import <Cocoa/Cocoa.h>
 #import <AppKit/NSApplication.h>

source/MaterialXRenderHw/WindowWrapper.cpp

@@ -84,7 +84,7 @@ WindowWrapper::WindowWrapper(ExternalWindowHandle externalHandle,
                              DisplayHandle display)
 {
     _externalHandle = externalHandle;
-#ifndef TARGET_OS_IOS
+#ifndef TARGET_OS_IPHONE
     // Cache a pointer to the window.
     _internalHandle = NSUtilGetView(externalHandle);
 #else

source/MaterialXRenderMsl/CMakeLists.txt

@@ -6,7 +6,7 @@ if(POLICY CMP0072)
 endif()
 
 if(APPLE)
-    if(NOT MATERIALX_BUILD_IOS)
+    if(NOT MATERIALX_BUILD_APPLE_EMBEDDED)
         find_library(COCOA_FRAMEWORK Cocoa)
         find_package(OpenGL REQUIRED)
     endif()
@@ -50,7 +50,7 @@ if(MSVC)
             PUBLIC
             Opengl32)
 elseif(APPLE)
-    if(NOT MATERIALX_BUILD_IOS)
+    if(NOT MATERIALX_BUILD_APPLE_EMBEDDED)
         target_link_libraries(${TARGET_NAME}
                 PUBLIC
                 "-framework Cocoa"