updated TSE to be able to use SDL3

CMakeLists.txt

@@ -4,6 +4,28 @@ cmake_minimum_required(VERSION 3.31)
 #project name
 project(TSE-RTS)
 
+# backend selection
+option(USE_GLFW "Build with GLFW backend" OFF)
+option(USE_SDL3 "Build with SDL3 backend" OFF)
+
+# default backend: GLFW
+if(NOT USE_GLFW AND NOT USE_SDL3)
+    set(USE_GLFW ON)
+endif()
+
+# forbid enabling both at once
+if(USE_GLFW AND USE_SDL3)
+    message(FATAL_ERROR "USE_GLFW and USE_SDL3 cannot both be ON. Select exactly one backend.")
+endif()
+
+if(USE_GLFW)
+    message(STATUS "Window backend: GLFW")
+endif()
+
+if(USE_SDL3)
+    message(STATUS "Window backend: SDL3")
+endif()
+
 #cpp settings
 find_program(CLANG_C NAMES clang)
 find_program(CLANG_CXX NAMES clang++)
@@ -28,8 +50,15 @@ add_subdirectory(TSE/TSE_Base)
 add_subdirectory(TSE/TSE_Math)
 add_subdirectory(TSE/TSE_Core)
 add_subdirectory(TSE/TSE_Editor)
-add_subdirectory(TSE/TSE_GlfwImpl)
-add_subdirectory(TSE/TSE_GlfwOpenGlImpl)
+add_subdirectory(TSE/TSE_OpenGlImpl)
+
+if(USE_GLFW)
+    add_subdirectory(TSE/TSE_GlfwImpl)
+endif()
+
+if(USE_SDL3)
+    add_subdirectory(TSE/TSE_Sdl3Impl)
+endif()
 
 #source files
 file(GLOB CPP_SOURCE
@@ -43,73 +72,127 @@ file(GLOB CPP_SOURCE
     "${PROJECT_SOURCE_DIR}/TSE-RTS/src/*/*/*/*.c"
 )
 
-#includes
-include_directories(${PROJECT_SOURCE_DIR}/TSE-RTS/src)
-include_directories(${PROJECT_SOURCE_DIR}/TSE-RTS/include)
-include_directories(${PROJECT_SOURCE_DIR}/TSE/TSE_Math/src)
-include_directories(${PROJECT_SOURCE_DIR}/TSE/TSE_Core/src)
-include_directories(${PROJECT_SOURCE_DIR}/TSE/TSE_Core/include)
-include_directories(${PROJECT_SOURCE_DIR}/TSE/TSE_Base/src)
-include_directories(${PROJECT_SOURCE_DIR}/TSE/TSE_Base/include)
-include_directories(${PROJECT_SOURCE_DIR}/TSE/TSE_Editor/src)
-
-#includes Glfw
-include_directories(${PROJECT_SOURCE_DIR}/TSE/TSE_GlfwImpl/src)
-include_directories(${PROJECT_SOURCE_DIR}/TSE/TSE_GlfwImpl/include)
-
-include_directories(${PROJECT_SOURCE_DIR}/TSE/TSE_GlfwOpenGlImpl/src)
-include_directories(${PROJECT_SOURCE_DIR}/TSE/TSE_GlfwOpenGlImpl/include)
-
 #project def
 add_executable(TSE-RTS ${CPP_SOURCE})
 
-if (WIN32)
-    if(DEBUG)
-        set(DEBUGSPEC 
-        "${PROJECT_SOURCE_DIR}/TSE/TSE_Core/include/FreeImageLib.d.lib"
-        "${PROJECT_SOURCE_DIR}/TSE/TSE_Core/include/box2dd.lib"
+# includes
+target_include_directories(TSE-RTS PRIVATE
+    ${PROJECT_SOURCE_DIR}/TSE-RTS/src
+    ${PROJECT_SOURCE_DIR}/TSE-RTS/include
+    ${PROJECT_SOURCE_DIR}/TSE/TSE_Math/src
+    ${PROJECT_SOURCE_DIR}/TSE/TSE_Core/src
+    ${PROJECT_SOURCE_DIR}/TSE/TSE_Core/include
+    ${PROJECT_SOURCE_DIR}/TSE/TSE_Base/src
+    ${PROJECT_SOURCE_DIR}/TSE/TSE_Base/include
+    ${PROJECT_SOURCE_DIR}/TSE/TSE_Editor/src
+    ${PROJECT_SOURCE_DIR}/TSE/TSE_OpenGlImpl/src
+    ${PROJECT_SOURCE_DIR}/TSE/TSE_OpenGlImpl/include
+)
+
+if(USE_GLFW)
+    target_include_directories(TSE-RTS PRIVATE
+        ${PROJECT_SOURCE_DIR}/TSE/TSE_GlfwImpl/src
+        ${PROJECT_SOURCE_DIR}/TSE/TSE_GlfwImpl/include
+    )
+endif()
+
+if(USE_SDL3)
+    target_include_directories(TSE-RTS PRIVATE
+        ${PROJECT_SOURCE_DIR}/TSE/TSE_Sdl3Impl/src
+        ${PROJECT_SOURCE_DIR}/TSE/TSE_Sdl3Impl/include
+    )
+endif()
+
+# compile definitions for active backend
+if(USE_GLFW)
+    target_compile_definitions(TSE-RTS PRIVATE TSE_WINDOW_BACKEND_GLFW)
+endif()
+
+if(USE_SDL3)
+    target_compile_definitions(TSE-RTS PRIVATE TSE_WINDOW_BACKEND_SDL3)
+endif()
+
+# external libs
+set(LIB_SOURCE "")
+set(BACKEND_LIBS "")
+set(BACKEND_TARGETS "")
+
+if(WIN32)
+    if(CMAKE_BUILD_TYPE STREQUAL "Debug")
+        set(DEBUGSPEC
+            "${PROJECT_SOURCE_DIR}/TSE/TSE_Core/include/FreeImageLib.d.lib"
+            "${PROJECT_SOURCE_DIR}/TSE/TSE_Core/include/box2dd.lib"
         )
     else()
-        set(DEBUGSPEC 
-        "${PROJECT_SOURCE_DIR}/TSE/TSE_Core/include/FreeImageLib.r.lib"
-        "${PROJECT_SOURCE_DIR}/TSE/TSE_Core/include/box2d.lib"
+        set(DEBUGSPEC
+            "${PROJECT_SOURCE_DIR}/TSE/TSE_Core/include/FreeImageLib.r.lib"
+            "${PROJECT_SOURCE_DIR}/TSE/TSE_Core/include/box2d.lib"
         )
     endif()
+
     set(LIB_SOURCE
-    "${PROJECT_SOURCE_DIR}/TSE/TSE_GlfwImpl/include/glfw3.lib"
-    # "${PROJECT_SOURCE_DIR}/../TSE.Core/lib/freetype.lib"
-    "${DEBUGSPEC}"
+        ${DEBUGSPEC}
     )
+
+    if(USE_GLFW)
+        list(APPEND LIB_SOURCE
+            "${PROJECT_SOURCE_DIR}/TSE/TSE_GlfwImpl/include/glfw3.lib"
+        )
+        list(APPEND BACKEND_TARGETS TSE_GlfwImpl)
+    endif()
+
+    if(USE_SDL3)
+        list(APPEND LIB_SOURCE
+            "${PROJECT_SOURCE_DIR}/TSE/TSE_Sdl3Impl/include/SDL3.lib"
+        )
+        list(APPEND BACKEND_TARGETS TSE_Sdl3Impl)
+    endif()
+
 else()
     set(LIB_SOURCE
-    # "${PROJECT_SOURCE_DIR}/../TSE.Core/lib/libfreetype.a"
-    "${PROJECT_SOURCE_DIR}/TSE/TSE_Core/include/libfreeimage.a"
-    "${PROJECT_SOURCE_DIR}/TSE/TSE_GlfwImpl/include/libglfw3.a"
-    "${PROJECT_SOURCE_DIR}/TSE/TSE_Core/include/libbox2d.a"
+        "${PROJECT_SOURCE_DIR}/TSE/TSE_Core/include/libfreeimage.a"
+        "${PROJECT_SOURCE_DIR}/TSE/TSE_Core/include/libbox2d.a"
+    )
+
+    if(USE_GLFW)
+        list(APPEND LIB_SOURCE
+            "${PROJECT_SOURCE_DIR}/TSE/TSE_GlfwImpl/include/libglfw3.a"
+        )
+        list(APPEND BACKEND_TARGETS TSE_GlfwImpl)
+    endif()
+
+    if(USE_SDL3)
+        list(APPEND LIB_SOURCE
+            "${PROJECT_SOURCE_DIR}/TSE/TSE_Sdl3Impl/include/libSDL3.a"
+        )
+        list(APPEND BACKEND_TARGETS TSE_Sdl3Impl)
+    endif()
+endif()
+
+# link
+if(WIN32)
+    target_link_libraries(TSE-RTS PUBLIC
+        TSE_Base
+        TSE_Math
+        TSE_Core
+        ${BACKEND_TARGETS}
+        TSE_OpenGlImpl
+        TSE_Editor
+        ${LIB_SOURCE}
+    )
+else()
+    target_link_libraries(TSE-RTS PUBLIC
+        TSE_Editor
+        TSE_OpenGlImpl
+        ${BACKEND_TARGETS}
+        TSE_Core
+        TSE_Math
+        TSE_Base
+        ${LIB_SOURCE}
     )
 endif()
 
-if (WIN32)
-    target_link_libraries(TSE-RTS PUBLIC
-    TSE_Base
-    TSE_Math
-    TSE_Core
-    TSE_GlfwImpl
-    TSE_GlfwOpenGlImpl
-    TSE_Editor
-    ${LIB_SOURCE})
-else()
-    target_link_libraries(TSE-RTS PUBLIC
-    TSE_Editor
-    TSE_GlfwOpenGlImpl
-    TSE_GlfwImpl
-    TSE_Core
-    TSE_Math
-    TSE_Base
-    ${LIB_SOURCE})
-endif()
-
-#flags
+# flags
 target_compile_options(TSE-RTS PRIVATE -march=native)
 
 set(TARGET_DIR "${PROJECT_SOURCE_DIR}/bin")