diff --git a/res/CMakeLists.txt b/res/CMakeLists.txt
index 9e90f53..ff4f923 100644
--- a/res/CMakeLists.txt
+++ b/res/CMakeLists.txt
@@ -1,112 +1,4 @@
-function(sprite)
-    set(options "")
-    set(multiValueArgs "")
-    set(oneValueArgs NAME X Y TRANSPARENT BPP CX CY)
-    cmake_parse_arguments(SPRITE "${options}" "${oneValueArgs}"
-        "${multiValueArgs}" ${ARGN})
-
-    if(PS1_BUILD)
-        if(${SPRITE_TRANSPARENT})
-            set(trans -mpink)
-        endif()
-
-        if(NOT "${SPRITE_BPP}" STREQUAL "16")
-            set(clut "-clut=${SPRITE_CX},${SPRITE_CY}")
-        endif()
-
-        add_custom_target(${SPRITE_NAME}_img ALL
-            bmp2tim ${SPRITE_NAME}.bmp ${CMAKE_CURRENT_BINARY_DIR}/${SPRITE_NAME}
-                ${SPRITE_BPP} -org=${SPRITE_X},${SPRITE_Y} ${clut} ${trans}
-            WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
-            DEPENDS ${SPRITE_NAME}.bmp
-            BYPRODUCTS ${CMAKE_CURRENT_BINARY_DIR}/${SPRITE_NAME})
-        add_dependencies(iso ${SPRITE_NAME}_img)
-    elseif(SDL1_2_BUILD)
-        if(${SPRITE_TRANSPARENT})
-            set(trans "transparent=1")
-        else()
-            set(trans "transparent=0")
-        endif()
-
-        add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${SPRITE_NAME}
-            COMMAND ${TOOLS_PREFIX}/bin/add-header ${trans} ${SPRITE_NAME}_24.bmp ${CMAKE_CURRENT_BINARY_DIR}/${SPRITE_NAME}
-            WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
-            DEPENDS ${SPRITE_NAME}_24.bmp
-            VERBATIM)
-        add_custom_target(${SPRITE_NAME}_img
-            DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/${SPRITE_NAME})
-        add_dependencies(${SPRITE_NAME}_img tools)
-    endif()
-endfunction()
-
-function(sound)
-    set(options "")
-    set(multiValueArgs "")
-    set(oneValueArgs NAME LOOP)
-    cmake_parse_arguments(SOUND "${options}" "${oneValueArgs}"
-        "${multiValueArgs}" ${ARGN})
-
-    if(PS1_BUILD)
-        if(${SOUND_LOOP})
-            set(loop -L)
-        endif()
-
-        add_custom_target(${SOUND_NAME}_snd ALL
-            wav2vag ${SOUND_NAME}.wav
-                ${CMAKE_CURRENT_BINARY_DIR}/${SOUND_NAME} ${loop}
-            WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
-            DEPENDS ${SOUND_NAME}.wav
-            BYPRODUCTS ${CMAKE_CURRENT_BINARY_DIR}/${SOUND_NAME})
-        add_dependencies(iso ${SOUND_NAME}_snd)
-    elseif(SDL1_2_BUILD)
-        if(${SOUND_LOOP})
-            set(loop "loop=1")
-        else()
-            set(loop "loop=0")
-        endif()
-
-        # Reference: https://gist.github.com/socantre/7ee63133a0a3a08f3990
-        add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${SOUND_NAME}
-            COMMAND ${TOOLS_PREFIX}/bin/add-header ${loop} ${SOUND_NAME}.wav ${CMAKE_CURRENT_BINARY_DIR}/${SOUND_NAME}
-            WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
-            DEPENDS ${SOUND_NAME}.wav
-            VERBATIM)
-        add_custom_target(${SOUND_NAME}_snd
-            DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/${SOUND_NAME})
-        add_dependencies(${SOUND_NAME}_snd tools)
-    endif()
-endfunction()
-
-function(container)
-    set(options "")
-    set(multiValueArgs SPRITES SOUNDS)
-    set(oneValueArgs NAME)
-    cmake_parse_arguments(CONTAINER "${options}" "${oneValueArgs}"
-        "${multiValueArgs}" ${ARGN})
-
-    add_custom_command(OUTPUT ${cdroot}/${CONTAINER_NAME}.cnt
-        COMMAND ${TOOLS_PREFIX}/bin/container ${CONTAINER_SPRITES} ${CONTAINER_SOUNDS}
-            ${cdroot}/${CONTAINER_NAME}.cnt
-        WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
-        VERBATIM)
-
-    add_custom_target(${CONTAINER_NAME}_container
-        DEPENDS ${cdroot}/${CONTAINER_NAME}.cnt)
-    add_dependencies(${PROJECT_NAME} ${CONTAINER_NAME}_container)
-    add_dependencies(${CONTAINER_NAME}_container tools)
-
-    foreach(sprite ${CONTAINER_SPRITES})
-        add_dependencies(${CONTAINER_NAME}_container ${sprite}_img)
-    endforeach()
-
-    foreach(sound ${CONTAINER_SOUNDS})
-        add_dependencies(${CONTAINER_NAME}_container ${sound}_snd)
-    endforeach()
-
-    if(PS1_BUILD)
-        add_dependencies(iso ${CONTAINER_NAME}_container)
-    endif()
-endfunction()
+include(${CMAKE_CURRENT_LIST_DIR}/functions.cmake)
 
 sprite(NAME worker_n
     X 384
diff --git a/res/functions.cmake b/res/functions.cmake
new file mode 100644
index 0000000..a0de87d
--- /dev/null
+++ b/res/functions.cmake
@@ -0,0 +1,109 @@
+function(sprite)
+    set(options "")
+    set(multiValueArgs "")
+    set(oneValueArgs NAME X Y TRANSPARENT BPP CX CY)
+    cmake_parse_arguments(SPRITE "${options}" "${oneValueArgs}"
+        "${multiValueArgs}" ${ARGN})
+
+    if(PS1_BUILD)
+        if(${SPRITE_TRANSPARENT})
+            set(trans -mpink)
+        endif()
+
+        if(NOT "${SPRITE_BPP}" STREQUAL "16")
+            set(clut "-clut=${SPRITE_CX},${SPRITE_CY}")
+        endif()
+
+        add_custom_target(${SPRITE_NAME}_img ALL
+            bmp2tim ${SPRITE_NAME}.bmp ${CMAKE_CURRENT_BINARY_DIR}/${SPRITE_NAME}
+                ${SPRITE_BPP} -org=${SPRITE_X},${SPRITE_Y} ${clut} ${trans}
+            WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+            DEPENDS ${SPRITE_NAME}.bmp
+            BYPRODUCTS ${CMAKE_CURRENT_BINARY_DIR}/${SPRITE_NAME})
+        add_dependencies(iso ${SPRITE_NAME}_img)
+    elseif(SDL1_2_BUILD)
+        if(${SPRITE_TRANSPARENT})
+            set(trans "transparent=1")
+        else()
+            set(trans "transparent=0")
+        endif()
+
+        add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${SPRITE_NAME}
+            COMMAND ${TOOLS_PREFIX}/bin/add-header ${trans} ${SPRITE_NAME}_24.bmp ${CMAKE_CURRENT_BINARY_DIR}/${SPRITE_NAME}
+            WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+            DEPENDS ${SPRITE_NAME}_24.bmp
+            VERBATIM)
+        add_custom_target(${SPRITE_NAME}_img
+            DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/${SPRITE_NAME})
+        add_dependencies(${SPRITE_NAME}_img tools)
+    endif()
+endfunction()
+
+function(sound)
+    set(options "")
+    set(multiValueArgs "")
+    set(oneValueArgs NAME LOOP)
+    cmake_parse_arguments(SOUND "${options}" "${oneValueArgs}"
+        "${multiValueArgs}" ${ARGN})
+
+    if(PS1_BUILD)
+        if(${SOUND_LOOP})
+            set(loop -L)
+        endif()
+
+        add_custom_target(${SOUND_NAME}_snd ALL
+            wav2vag ${SOUND_NAME}.wav
+                ${CMAKE_CURRENT_BINARY_DIR}/${SOUND_NAME} ${loop}
+            WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+            DEPENDS ${SOUND_NAME}.wav
+            BYPRODUCTS ${CMAKE_CURRENT_BINARY_DIR}/${SOUND_NAME})
+        add_dependencies(iso ${SOUND_NAME}_snd)
+    elseif(SDL1_2_BUILD)
+        if(${SOUND_LOOP})
+            set(loop "loop=1")
+        else()
+            set(loop "loop=0")
+        endif()
+
+        # Reference: https://gist.github.com/socantre/7ee63133a0a3a08f3990
+        add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${SOUND_NAME}
+            COMMAND ${TOOLS_PREFIX}/bin/add-header ${loop} ${SOUND_NAME}.wav ${CMAKE_CURRENT_BINARY_DIR}/${SOUND_NAME}
+            WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+            DEPENDS ${SOUND_NAME}.wav
+            VERBATIM)
+        add_custom_target(${SOUND_NAME}_snd
+            DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/${SOUND_NAME})
+        add_dependencies(${SOUND_NAME}_snd tools)
+    endif()
+endfunction()
+
+function(container)
+    set(options "")
+    set(multiValueArgs SPRITES SOUNDS)
+    set(oneValueArgs NAME)
+    cmake_parse_arguments(CONTAINER "${options}" "${oneValueArgs}"
+        "${multiValueArgs}" ${ARGN})
+
+    add_custom_command(OUTPUT ${cdroot}/${CONTAINER_NAME}.cnt
+        COMMAND ${TOOLS_PREFIX}/bin/container ${CONTAINER_SPRITES} ${CONTAINER_SOUNDS}
+            ${cdroot}/${CONTAINER_NAME}.cnt
+        WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
+        VERBATIM)
+
+    add_custom_target(${CONTAINER_NAME}_container
+        DEPENDS ${cdroot}/${CONTAINER_NAME}.cnt)
+    add_dependencies(${PROJECT_NAME} ${CONTAINER_NAME}_container)
+    add_dependencies(${CONTAINER_NAME}_container tools)
+
+    foreach(sprite ${CONTAINER_SPRITES})
+        add_dependencies(${CONTAINER_NAME}_container ${sprite}_img)
+    endforeach()
+
+    foreach(sound ${CONTAINER_SOUNDS})
+        add_dependencies(${CONTAINER_NAME}_container ${sound}_snd)
+    endforeach()
+
+    if(PS1_BUILD)
+        add_dependencies(iso ${CONTAINER_NAME}_container)
+    endif()
+endfunction()