fix few warnings

CMakeLists.txt

@@ -61,6 +61,15 @@ if(E2D_BUILD_WITH_SANITIZER AND (CMAKE_CXX_COMPILER_ID MATCHES "Clang"))
     set(CMAKE_LINKER_FLAGS_DEBUG "${CMAKE_LINKER_FLAGS_DEBUG} ${E2D_SANITIZER_FLAGS}")
 endif()
 
+#
+# global compiling mode
+#
+
+if(MSVC)
+    add_definitions(/MP)
+    add_definitions(-D_CRT_SECURE_NO_WARNINGS)
+endif(MSVC)
+
 #
 # e2d sources
 #

sources/enduro2d/high/systems/render_system_impl/render_system_batcher.hpp

@@ -124,7 +124,7 @@ namespace e2d { namespace render_system_impl
                 std::transform(
                     iter, indices_.end(), iter,
                     [add = vertices_.size()](index_type v) noexcept {
-                        return v + add;
+                        return static_cast<index_type>(v + add);
                     });
                 batches_.back().count += index_count;
             }