Implement resource packaging for web builds

libs/sdl2/source/main.cpp

@@ -1,4 +1,5 @@
 #include <psemek/app/application.hpp>
+#include <psemek/app/resource.hpp>
 #include <psemek/gfx/init.hpp>
 #include <psemek/sdl2/init.hpp>
 #include <psemek/sdl2/window.hpp>
@@ -50,6 +51,12 @@ int main(int argc, char ** argv) try
 	log::add_sink(log::default_sink(std::move(synchronized_stdout_stderr[1]), log::level::warning, log::level::error));
 	log::register_thread("main");
 
+#ifdef __EMSCRIPTEN__
+	// In web builds, resources are in the root of
+	// the Emscripten virtual filesystem
+	app::set_resource_root("/");
+#endif
+
 	auto const factory = app::make_application_factory();
 	auto const options = factory->options();
 

package/CMakeLists.txt

@@ -110,6 +110,7 @@ function(psemek_add_executable_impl target is_application)
 
 					list(APPEND _TARGET_RUNTIME ${_TARGET_NOEXT}.js)
 					list(APPEND _TARGET_RUNTIME ${_TARGET_NOEXT}.wasm)
+					list(APPEND _TARGET_RUNTIME ${_TARGET_NOEXT}.data)
 				endif()
 
 				set(_COPY_FILES ${_TARGET_FILE} ${_TARGET_RUNTIME} ${PSEMEK_PACKAGE_COPY_FILES})
@@ -228,6 +229,12 @@ function(psemek_package_files target)
 					WORKING_DIRECTORY ${CMAKE_CURRENT_LIST_DIR}
 					COMMAND ${PSEMEK_COPY_FILES} ${ARGN}
 				)
+			elseif(CMAKE_SYSTEM_NAME STREQUAL Emscripten)
+				foreach(_FILE IN LISTS ARGN)
+					target_link_options(${target} PRIVATE
+						"--preload-file=${CMAKE_CURRENT_LIST_DIR}/${_FILE}@/${_FILE}"
+					)
+				endforeach()
 			else()
 				psemek_package_output_path(${target} _OUTPUT_PATH)