v0.1.0: software map renderer + SDL3 window viewer

CMakeLists.txt

@@ -83,13 +83,45 @@ target_sources(ra3_skirmish
 target_link_libraries(ra3_skirmish PUBLIC ra3_core ra3_logic ra3_game ra3_map)
 openra3_target_defaults(ra3_skirmish)
 
+# --- software renderer: framebuffer, TGA decode, BMP encode, map compositing ---
+add_library(ra3_render STATIC)
+target_sources(ra3_render
+    PUBLIC FILE_SET CXX_MODULES FILES
+        src/render/ra3.render.cppm
+)
+target_link_libraries(ra3_render PUBLIC ra3_core)
+openra3_target_defaults(ra3_render)
+
+# --- windowed viewer: SDL3 when available, otherwise a null backend ---
+find_package(PkgConfig QUIET)
+if(PkgConfig_FOUND)
+    pkg_check_modules(SDL3 QUIET IMPORTED_TARGET sdl3)
+endif()
+add_library(ra3_ui STATIC)
+if(SDL3_FOUND)
+    target_sources(ra3_ui
+        PUBLIC FILE_SET CXX_MODULES FILES
+            src/ui/ra3.ui.sdl.cppm
+    )
+    target_link_libraries(ra3_ui PUBLIC ra3_core ra3_render PkgConfig::SDL3)
+    message(STATUS "OpenRA3: SDL3 ${SDL3_VERSION} found - windowed viewer enabled")
+else()
+    target_sources(ra3_ui
+        PUBLIC FILE_SET CXX_MODULES FILES
+            src/ui/ra3.ui.null.cppm
+    )
+    target_link_libraries(ra3_ui PUBLIC ra3_core ra3_render)
+    message(STATUS "OpenRA3: SDL3 not found - offscreen BMP output only")
+endif()
+openra3_target_defaults(ra3_ui)
+
 # --- umbrella module re-exporting the whole SDK ---
 add_library(ra3 STATIC)
 target_sources(ra3
     PUBLIC FILE_SET CXX_MODULES FILES
         src/ra3.cppm
 )
-target_link_libraries(ra3 PUBLIC ra3_core ra3_logic ra3_client ra3_game ra3_fs ra3_map ra3_skirmish)
+target_link_libraries(ra3 PUBLIC ra3_core ra3_logic ra3_client ra3_game ra3_fs ra3_map ra3_skirmish ra3_render ra3_ui)
 openra3_target_defaults(ra3)
 
 # --- the headless game executable ---