working msdfgen version of loading and building for win

3rdParty/msdf/CMakeLists.txt

@@ -0,0 +1,78 @@
+include(FetchContent)
+
+unset(ASSIMP_FOUND)
+find_package(ASSIMP QUIET)
+if (NOT ASSIMP_FOUND)
+    message(FATAL_ERROR "Assimp package is required to build msdfgen")
+endif()
+
+if(NOT DEFINED MSDFGEN_REPO)
+    set(MSDFGEN_REPO https://github.com/Chlumsky/msdfgen.git)
+endif ()
+
+if(NOT DEFINED VCPKG_REPO)
+    set(VCPKG_REPO https://github.com/microsoft/vcpkg.git)
+endif()
+
+set(VCPKG_SRC_DIR "${CMAKE_BINARY_DIR}/_deps/vcpkg-src")
+if (NOT EXISTS ${VCPKG_SRC_DIR} OR VCPKG_EXECUTABLE STREQUAL "" OR NOT DEFINED VCPKG_EXECUTABLE)
+    message("Cloning vcpkg...")
+    FetchContent_Declare(
+            vcpkg
+            EXCLUDE_FROM_ALL
+            GIT_REPOSITORY ${VCPKG_REPO}
+            GIT_TAG master
+            GIT_SHALLOW TRUE
+    )
+    FetchContent_MakeAvailable(vcpkg)    
+    if (WIN32)
+        execute_process(COMMAND "${VCPKG_SRC_DIR}/bootstrap-vcpkg.bat")
+        set(VCPKG_EXECUTABLE "${VCPKG_SRC_DIR}/vcpkg.exe" CACHE INTERNAL "vcpkg executable")
+    else()
+        execute_process(COMMAND bash "${VCPKG_SRC_DIR}/bootstrap-vcpkg.sh")
+        set(VCPKG_EXECUTABLE "${VCPKG_SRC_DIR}/vcpkg" CACHE INTERNAL "vcpkg executable")
+    endif()
+endif()
+
+# custom triplets (looks like doesn't work)
+#if (WIN32)
+#    set(VCPKG_TARGET_TRIPLET "${CMAKE_SOURCE_DIR}/cmake/x64-windows-static-triplet" CACHE STRING "VCPKG Target Triplet to use")
+#elseif(UNIX)
+#    set(VCPKG_TARGET_TRIPLET "${CMAKE_SOURCE_DIR}/cmake/x64-linux-triplet" CACHE STRING "VCPKG Target Triplet to use")
+#endif()
+
+if (WIN32)
+    # static win build breaks find_library call. need to specify FREETYPE_LIBRARY and FREETYPE_INCLUDE_DIRS manually.
+    # plain x64-windows will link freetype as dll instead of lib .......
+    set(TRIPLET x64-windows-static)
+elseif(UNIX)
+    set(TRIPLET x64-linux)
+elseif(APPLE)
+    set(TRIPLET x64-osx)
+else()
+    message(FATAL_ERROR "Unknown OS, can't build msdfgen")
+endif()
+
+execute_process(COMMAND ${VCPKG_EXECUTABLE} install freetype:${TRIPLET})
+set(CMAKE_TOOLCHAIN_FILE "${CMAKE_BINARY_DIR}/_deps/vcpkg-src/scripts/buildsystems/vcpkg.cmake" CACHE STRING "cmake toolchain")
+include("${VCPKG_SRC_DIR}/scripts/buildsystems/vcpkg.cmake")
+
+if(WIN32)
+    set(FREETYPE_LIBRARY "${VCPKG_SRC_DIR}/buildtrees/freetype/${TRIPLET}-rel/freetype.lib" CACHE STRING "freetype lib path on win")
+    set(FREETYPE_INCLUDE_DIRS "${VCPKG_SRC_DIR}/packages/freetype_${TRIPLET}/include" CACHE STRING "freetype include path on win")
+endif()
+
+#find_package(Freetype REQUIRED)
+
+set(MSDFGEN_DISABLE_SVG TRUE CACHE INTERNAL "disable msdfgen svg")
+set(MSDFGEN_DISABLE_PNG TRUE CACHE INTERNAL "disable msdfgen png")
+set(MSDFGEN_USE_SKIA OFF CACHE BOOL "use skia" FORCE)
+
+FetchContent_Declare(
+        msdfgen
+        EXCLUDE_FROM_ALL
+        GIT_REPOSITORY ${MSDFGEN_REPO}
+        GIT_TAG v1.12
+        GIT_SHALLOW TRUE
+)
+FetchContent_MakeAvailable(msdfgen)