From 741306c0a7972b94f65933075b79eb6537626adb Mon Sep 17 00:00:00 2001
From: Amin Yahyaabadi <aminyahyaabadi74@gmail.com>
Date: Wed, 6 Nov 2024 10:19:18 -0800
Subject: [PATCH] feat: support installing and finding filament via
 `find_package`

---
 CMakeLists.txt          | 56 ++++++++++++++++++++++++++++++++++++++---
 filamentConfig.cmake.in |  9 +++++++
 2 files changed, 61 insertions(+), 4 deletions(-)
 create mode 100644 filamentConfig.cmake.in

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 649577b396c..ef849127e74 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -14,7 +14,7 @@ endif()
 # ==================================================================================================
 # Project declaration
 # ==================================================================================================
-project(TNT)
+project(filament VERSION 1.56.0)
 
 # ==================================================================================================
 # Options
@@ -47,6 +47,8 @@ option(FILAMENT_ENABLE_MULTIVIEW "Enable multiview for Filament" OFF)
 
 option(FILAMENT_SUPPORTS_OSMESA "Enable OSMesa (headless GL context) for Filament" OFF)
 
+option(FILAMENT_INSTALL_RULES "Enable Filament's install rules" ON)
+
 set(FILAMENT_NDK_VERSION "" CACHE STRING
     "Android NDK version or version prefix to be used when building for Android."
 )
@@ -829,7 +831,53 @@ if (IS_HOST_PLATFORM)
     add_subdirectory(${TOOLS}/uberz)
 endif()
 
-# Generate exported executables for cross-compiled builds (Android, WebGL, and iOS)
-if (NOT CMAKE_CROSSCOMPILING)
-    export(TARGETS matc cmgen filamesh mipgen resgen uberz glslminifier FILE ${IMPORT_EXECUTABLES})
+if(FILAMENT_INSTALL_RULES)
+    # version file
+    include(CMakePackageConfigHelpers)
+    include(GNUInstallDirs)
+    write_basic_package_version_file("${CMAKE_BINARY_DIR}/filamentConfigVersion.cmake"
+        VERSION ${PROJECT_VERSION}
+        COMPATIBILITY SameMajorVersion)
+    install(FILES "${CMAKE_BINARY_DIR}/filamentConfigVersion.cmake"
+        DESTINATION ${CMAKE_INSTALL_DATADIR}/cmake/filament
+        COMPONENT filament)
+
+    # public header dependencies
+    set(HEADER_DEPS cgltf jsmn SPIRV-Headers)
+    foreach(_dep ${HEADER_DEPS})
+        get_target_property(_dep_include ${_dep} INTERFACE_INCLUDE_DIRECTORIES)
+        set_target_properties(${_dep} PROPERTIES INTERFACE_INCLUDE_DIRECTORIES
+            "$<BUILD_INTERFACE:${_dep_include}>$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>"
+        )
+    endforeach()
+    install(TARGETS ${HEADER_DEPS} EXPORT filament-targets COMPONENT filament-dependencies)
+    export(TARGETS ${HEADER_DEPS}
+        NAMESPACE filament::
+        FILE "${CMAKE_BINARY_DIR}/filamentTargets-Dependencies.cmake")
+
+    # config file
+    set(PACKAGE_VERSION ${PROJECT_VERSION})
+    configure_package_config_file("${CMAKE_CURRENT_LIST_DIR}/filamentConfig.cmake.in"
+        "${CMAKE_BINARY_DIR}/filamentConfig.cmake"
+        INSTALL_DESTINATION ${CMAKE_INSTALL_DATADIR}/cmake/filament)
+    install(FILES "${CMAKE_BINARY_DIR}/filamentConfig.cmake"
+        DESTINATION ${CMAKE_INSTALL_DATADIR}/cmake/filament
+        COMPONENT filament)
+
+    # targets file
+    set(TARGETS camutils filabridge filaflat filagui filameshio uberarchive gltfio_core gltfio ibl ibl-lite filament-iblprefilter
+        image ktxreader math mathio uberzlib utils viewer backend backend_headers vkshaders backend_test_linux filament
+        shaders geometry filamat matdbg_resources matdbg bluevk bluegl imageio cmgen cso-lut filamesh glslminifier matlang
+        matc matinfo matedit mipgen normal-blending resgen rgb-to-lmsr roughness-prefilter specular-color uberz
+        getopt smol-v vkmemalloc)
+    install(TARGETS ${TARGETS} EXPORT filament-targets COMPONENT filament)
+    export(TARGETS ${TARGETS}
+        NAMESPACE filament::
+        FILE "${CMAKE_BINARY_DIR}/filamentTargets.cmake")
+    export(PACKAGE filament)
+    install(EXPORT filament-targets
+        NAMESPACE filament::
+        DESTINATION ${CMAKE_INSTALL_DATADIR}/cmake/filament
+        FILE "filamentTargets.cmake"
+        COMPONENT filament)
 endif()
diff --git a/filamentConfig.cmake.in b/filamentConfig.cmake.in
new file mode 100644
index 00000000000..ee320541d1d
--- /dev/null
+++ b/filamentConfig.cmake.in
@@ -0,0 +1,9 @@
+set(filament_VERSION @PACKAGE_VERSION@)
+
+@PACKAGE_INIT@
+
+@PACKAGE_DEPENDENCIES@
+
+include("${CMAKE_CURRENT_LIST_DIR}/filamentTargets.cmake")
+
+@INCLUDED_CONTENT@