CMake: move convert_shaders_to_headers from FX

Author: TheMostDiligent

BuildTools/CMake/BuildUtils.cmake

@@ -583,3 +583,51 @@ function(target_link_whole_archive tgt lib)
         endif()
     endif()
 endfunction()
+
+
+# Converts shaders to headers and generates master header with the list of all files
+function(convert_shaders_to_headers _SHADERS _SHADER_OUTPUT_DIR _SHADERS_LIST_FILE _SHADERS_INC_LIST)
+    if(NOT FILE2STRING_PATH STREQUAL "")
+        find_package(Python3 REQUIRED)
+
+        file(MAKE_DIRECTORY ${_SHADER_OUTPUT_DIR})
+
+        file(WRITE ${_SHADERS_LIST_FILE}
+            "static const MemoryShaderSourceFileInfo g_Shaders[] =\n"
+            "{"
+            )
+
+        foreach(FILE ${_SHADERS})
+            get_filename_component(FILE_NAME ${FILE} NAME)
+            set(CONVERTED_FILE ${_SHADER_OUTPUT_DIR}/${FILE_NAME}.h)
+            add_custom_command(OUTPUT ${CONVERTED_FILE}
+                               COMMAND ${Python3_EXECUTABLE} ${FILE2STRING_PATH} ${FILE} ${CONVERTED_FILE} --strip-comments
+                               DEPENDS ${FILE}
+                               COMMENT "Processing shader ${FILE}"
+                               VERBATIM)
+
+            string(REPLACE "." "_" VAR_NAME "${FILE_NAME}")
+            file(APPEND ${_SHADERS_LIST_FILE}
+                    "\n    {"
+                    "\n        \"${FILE_NAME}\","
+                    "\n        #include \"${FILE_NAME}.h\""
+                    "\n    },"
+                )
+
+                list(APPEND SHADERS_INC_LIST ${CONVERTED_FILE})
+        endforeach()
+
+        file(APPEND ${_SHADERS_LIST_FILE}
+            "\n};\n"
+            )
+
+        set_source_files_properties(
+            ${SHADERS_INC_LIST}
+            PROPERTIES GENERATED TRUE
+        )
+
+        set(${_SHADERS_INC_LIST} ${SHADERS_INC_LIST} PARENT_SCOPE)
+    else()
+        message(WARNING "File2String utility is currently unavailable on this host system. This is not an issues unless you modify shaders")
+    endif()
+endfunction()