重构SpriteAssertTool.cpp，减少中间文件产生；重构TomGame文件夹，删去不必要的文件；修改CMakeLists，PC重构Game自动重新构建资源头文件；修改文档

src/Apps/Game/CMakeLists.txt

@@ -1,8 +1,10 @@
 set(TOM_GAME_TARGET IMX6U-Game)
+set(TOM_ATLAS_HEADER "${CMAKE_CURRENT_SOURCE_DIR}/generated/tom_atlas.h")
+set_source_files_properties(${TOM_ATLAS_HEADER} PROPERTIES GENERATED TRUE)
 
 add_executable(${TOM_GAME_TARGET}
     Main.cpp
-    generated/tom_atlas.h
+    ${TOM_ATLAS_HEADER}
 )
 
 target_include_directories(${TOM_GAME_TARGET} PRIVATE
@@ -11,91 +13,78 @@ target_include_directories(${TOM_GAME_TARGET} PRIVATE
 
 imx6u_configure_app_target(${TOM_GAME_TARGET})
 
+if(CMAKE_CROSSCOMPILING AND NOT EXISTS "${TOM_ATLAS_HEADER}")
+    message(FATAL_ERROR
+        "Tom atlas header is missing. Run GenerateTomAtlasHeader in a host build before cross compiling."
+    )
+endif()
+
 if(NOT USE_FRAMEBUFFER)
-    set(SPRITE_ASSET_TOOL_SOURCES
+    set(TOM_ATLAS_TOOL_SOURCES
         tools/asset_pipeline/SpriteAssetTool.cpp
-        ${PROJECT_SOURCE_DIR}/src/Core/Asset/SpriteAssetLoader.cpp
     )
 
     if(WIN32)
-        add_executable(TomSpriteAssetTool EXCLUDE_FROM_ALL ${SPRITE_ASSET_TOOL_SOURCES})
-        set_target_properties(TomSpriteAssetTool PROPERTIES OUTPUT_NAME SpriteAssetTool)
-        target_include_directories(TomSpriteAssetTool PRIVATE
-            ${PROJECT_SOURCE_DIR}/src/Core/Asset
-            ${PROJECT_SOURCE_DIR}/src/Core/RenderData
+        add_executable(TomAtlasTool EXCLUDE_FROM_ALL ${TOM_ATLAS_TOOL_SOURCES})
+        target_include_directories(TomAtlasTool PRIVATE
             ${PROJECT_SOURCE_DIR}/libs/Win/SDL2/include
             ${PROJECT_SOURCE_DIR}/libs/Win/SDL_image/include
         )
-        target_link_directories(TomSpriteAssetTool PRIVATE
+        target_link_directories(TomAtlasTool PRIVATE
             ${SDL2_LIB_DIR}
             ${SDL2_IMAGE_LIB_DIR}
         )
-        target_link_libraries(TomSpriteAssetTool PRIVATE SDL2main SDL2 SDL2_image)
+        target_link_libraries(TomAtlasTool PRIVATE SDL2main SDL2 SDL2_image)
 
-        add_custom_command(TARGET TomSpriteAssetTool POST_BUILD
+        add_custom_command(TARGET TomAtlasTool POST_BUILD
             COMMAND ${CMAKE_COMMAND} -E copy_if_different
             "${SDL2_DLL}"
-            "$<TARGET_FILE_DIR:TomSpriteAssetTool>"
+            "$<TARGET_FILE_DIR:TomAtlasTool>"
         )
-        add_custom_command(TARGET TomSpriteAssetTool POST_BUILD
+        add_custom_command(TARGET TomAtlasTool POST_BUILD
             COMMAND ${CMAKE_COMMAND} -E copy_if_different
             "${SDL2_IMAGE_DLL}"
-            "$<TARGET_FILE_DIR:TomSpriteAssetTool>"
+            "$<TARGET_FILE_DIR:TomAtlasTool>"
         )
     elseif(SDL2_image_FOUND)
-        add_executable(TomSpriteAssetTool EXCLUDE_FROM_ALL ${SPRITE_ASSET_TOOL_SOURCES})
-        set_target_properties(TomSpriteAssetTool PROPERTIES OUTPUT_NAME SpriteAssetTool)
-        target_include_directories(TomSpriteAssetTool PRIVATE
-            ${PROJECT_SOURCE_DIR}/src/Core/Asset
-            ${PROJECT_SOURCE_DIR}/src/Core/RenderData
+        add_executable(TomAtlasTool EXCLUDE_FROM_ALL ${TOM_ATLAS_TOOL_SOURCES})
+        target_include_directories(TomAtlasTool PRIVATE
             ${SDL2_image_INCLUDE_DIRS}
             ${SDL2_IMAGE_INCLUDE_DIRS}
         )
-        target_link_libraries(TomSpriteAssetTool PRIVATE SDL2::SDL2)
+        target_link_libraries(TomAtlasTool PRIVATE SDL2::SDL2)
 
         if(TARGET SDL2_image::SDL2_image)
-            target_link_libraries(TomSpriteAssetTool PRIVATE SDL2_image::SDL2_image)
+            target_link_libraries(TomAtlasTool PRIVATE SDL2_image::SDL2_image)
         else()
-            target_link_libraries(TomSpriteAssetTool PRIVATE
+            target_link_libraries(TomAtlasTool PRIVATE
                 ${SDL2_image_LIBRARIES}
                 ${SDL2_IMAGE_LIBRARIES}
             )
         endif()
     else()
-        message(STATUS "SpriteAssetTool disabled: SDL2_image was not found")
+        message(STATUS "TomAtlasTool disabled: SDL2_image was not found")
     endif()
 
-    if(TARGET TomSpriteAssetTool)
-        add_custom_target(ConvertTomSprites
-            COMMAND $<TARGET_FILE:TomSpriteAssetTool>
-                --batch
-                "src/Apps/Game/assets/raw"
-                "src/Apps/Game/assets/sprites"
-                --preset tom-800x480
-            WORKING_DIRECTORY "${PROJECT_SOURCE_DIR}"
-            DEPENDS TomSpriteAssetTool
-            COMMENT "Converting Tom PNG assets to board-ready .sprite files"
-            VERBATIM
-        )
-
-        add_custom_target(GenerateTomAtlasHeader
-            COMMAND $<TARGET_FILE:TomSpriteAssetTool>
-                --atlas-header
-                "src/Apps/Game/assets/raw"
-                "src/Apps/Game/generated/tom_atlas.h"
-                tom_atlas
-                --atlas-width
-                1024
-                --preset
-                tom-800x480
-            WORKING_DIRECTORY "${PROJECT_SOURCE_DIR}"
-            DEPENDS TomSpriteAssetTool
-            COMMENT "Generating Tom atlas header from PNG assets"
-            VERBATIM
-        )
-
+    if(TARGET TomAtlasTool)
         if(NOT CMAKE_CROSSCOMPILING)
+            add_custom_target(GenerateTomAtlasHeader
+                COMMAND ${CMAKE_COMMAND} -E make_directory
+                    "src/Apps/Game/generated"
+                COMMAND $<TARGET_FILE:TomAtlasTool>
+                WORKING_DIRECTORY "${PROJECT_SOURCE_DIR}"
+                DEPENDS TomAtlasTool
+                COMMENT "Generating Tom atlas header from PNG assets"
+                VERBATIM
+            )
+
             add_dependencies(${TOM_GAME_TARGET} GenerateTomAtlasHeader)
+        else()
+            add_custom_target(GenerateTomAtlasHeader
+                COMMAND ${CMAKE_COMMAND} -E echo
+                    "GenerateTomAtlasHeader is host-only. Run it in build-win or build-linux before cross compiling."
+                VERBATIM
+            )
         endif()
     endif()
 endif()