Can now build to android apk

Need to fix:
- Remove default android header bar
- Fix rcss styling to work on small screens

android/app/CMakeLists.txt

@@ -0,0 +1,138 @@
+cmake_minimum_required(VERSION 3.22.1)
+project(critterfolio_android LANGUAGES C CXX)
+
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+include(ExternalProject)
+
+set(DEPS_INSTALL ${CMAKE_BINARY_DIR}/deps/install)
+
+# ExternalProject_Add spawns a completely separate CMake invocation for each
+# dependency, so none of AGP's Android toolchain settings carry over
+# automatically - we have to forward them explicitly to every sub-build.
+set(ANDROID_TOOLCHAIN_ARGS
+  -DCMAKE_TOOLCHAIN_FILE=${CMAKE_TOOLCHAIN_FILE}
+  -DANDROID_ABI=${ANDROID_ABI}
+  -DANDROID_PLATFORM=${ANDROID_PLATFORM}
+  -DANDROID_STL=c++_shared
+  -DCMAKE_BUILD_TYPE=Release
+  -DCMAKE_INSTALL_PREFIX=${DEPS_INSTALL}
+  -DCMAKE_PREFIX_PATH=${DEPS_INSTALL}
+  -DBUILD_SHARED_LIBS=OFF
+  -DCMAKE_CXX_STANDARD=17
+  -DCMAKE_CXX_STANDARD_REQUIRED=ON
+  -DCMAKE_FIND_ROOT_PATH_MODE_PACKAGE=BOTH
+  -DCMAKE_FIND_ROOT_PATH_MODE_LIBRARY=BOTH
+  -DCMAKE_FIND_ROOT_PATH_MODE_INCLUDE=BOTH
+)
+
+find_package(SDL3 REQUIRED CONFIG)
+find_package(SDL3_image REQUIRED CONFIG)
+
+ExternalProject_Add(freetype_ext
+  GIT_REPOSITORY https://github.com/freetype/freetype.git
+  GIT_TAG VER-2-13-3
+  CMAKE_ARGS ${ANDROID_TOOLCHAIN_ARGS}
+    -DFT_DISABLE_ZLIB=TRUE
+    -DFT_DISABLE_BZIP2=TRUE
+    -DFT_DISABLE_PNG=TRUE
+    -DFT_DISABLE_HARFBUZZ=TRUE
+    -DFT_DISABLE_BROTLI=TRUE
+)
+
+ExternalProject_Add(lunasvg_ext
+  GIT_REPOSITORY https://github.com/sammycage/lunasvg.git
+  GIT_TAG v3.2.1
+  CMAKE_ARGS ${ANDROID_TOOLCHAIN_ARGS}
+  DEPENDS freetype_ext
+)
+
+# Lua ships no official CMakeLists, and we don't want its standalone lua/luac
+# CLI targets (those need readline). We compile just the library sources.
+ExternalProject_Add(lua_ext
+  GIT_REPOSITORY https://github.com/lua/lua.git
+  GIT_TAG v5.4.8
+  CONFIGURE_COMMAND ""
+  BUILD_IN_SOURCE 1
+  BUILD_COMMAND sh -c "${CMAKE_C_COMPILER} --target=${CMAKE_C_COMPILER_TARGET} --sysroot=${CMAKE_SYSROOT} -c -O2 -fPIC -DLUA_USE_POSIX $(ls *.c | grep -v -e '^lua.c$' -e '^luac.c$') && ${CMAKE_AR} rcs liblua.a *.o"
+  INSTALL_COMMAND ${CMAKE_COMMAND} -E make_directory ${DEPS_INSTALL}/lib ${DEPS_INSTALL}/include
+    COMMAND ${CMAKE_COMMAND} -E copy liblua.a ${DEPS_INSTALL}/lib/
+    COMMAND ${CMAKE_COMMAND} -E copy lua.h lauxlib.h lualib.h luaconf.h ${DEPS_INSTALL}/include/
+)
+
+ExternalProject_Add(sqlitecpp_ext
+  GIT_REPOSITORY https://github.com/SRombauts/SQLiteCpp.git
+  GIT_TAG 3.3.3
+  CMAKE_ARGS ${ANDROID_TOOLCHAIN_ARGS}
+    -DSQLITECPP_INTERNAL_SQLITE=ON
+    -DSQLITECPP_RUN_CPPLINT=OFF
+    -DSQLITECPP_RUN_CPPCHECK=OFF
+)
+
+ExternalProject_Add(toml11_ext
+  GIT_REPOSITORY https://github.com/ToruNiina/toml11.git
+  GIT_TAG v3.8.1
+  CMAKE_ARGS ${ANDROID_TOOLCHAIN_ARGS}
+)
+
+ExternalProject_Add(rmlui_ext
+  GIT_REPOSITORY https://github.com/mikke89/RmlUi.git
+  GIT_TAG master
+  CMAKE_ARGS ${ANDROID_TOOLCHAIN_ARGS}
+    -DFreetype_ROOT=${DEPS_INSTALL}
+    -DRMLUI_LUA_BINDINGS=ON
+    -DRMLUI_LUA_BINDINGS_LIBRARY=lua
+    -DRMLUI_SVG_PLUGIN=ON
+    -DRMLUI_SAMPLES=OFF
+    -DBUILD_TESTING=OFF
+  DEPENDS freetype_ext lunasvg_ext lua_ext
+)
+
+set(PROJECT_SRC_DIR ${CMAKE_SOURCE_DIR}/../../src)
+set(RMLUI_BACKEND_DIR ${CMAKE_SOURCE_DIR}/../../vendor/rmlui_backend)
+
+add_library(critterfolio SHARED
+  ${PROJECT_SRC_DIR}/main.cpp
+  ${PROJECT_SRC_DIR}/database.cpp
+  ${PROJECT_SRC_DIR}/ui.cpp
+  ${PROJECT_SRC_DIR}/image_utils.cpp
+  ${RMLUI_BACKEND_DIR}/RmlUi_Backend_SDL_SDLrenderer.cpp
+  ${RMLUI_BACKEND_DIR}/RmlUi_Platform_SDL.cpp
+  ${RMLUI_BACKEND_DIR}/RmlUi_Renderer_SDL.cpp
+)
+
+add_dependencies(critterfolio freetype_ext lunasvg_ext lua_ext sqlitecpp_ext toml11_ext rmlui_ext)
+
+target_include_directories(critterfolio PRIVATE
+  ${PROJECT_SRC_DIR}
+  ${RMLUI_BACKEND_DIR}
+  ${DEPS_INSTALL}/include
+)
+
+target_compile_definitions(critterfolio PRIVATE
+  RMLUI_SDL_VERSION_MAJOR=3
+  RMLUI_STATIC_LIB
+)
+
+# Linked by explicit path rather than find_package(), since find_package()
+# runs during THIS configure pass - before any ExternalProject_Add step
+# above has actually built or installed anything (those only run later,
+# during the actual build). This is what the superbuild pattern is for.
+target_link_directories(critterfolio PRIVATE ${DEPS_INSTALL}/lib)
+
+target_link_libraries(critterfolio PRIVATE
+  SDL3::SDL3
+  SDL3_image::SDL3_image
+  rmlui
+  rmlui_debugger
+  rmlui_lua
+  lua
+  freetype
+  lunasvg
+  plutovg
+  SQLiteCpp
+  sqlite3
+)
+
+target_link_options(critterfolio PRIVATE "-Wl,-u,SDL_main")