Share SPIR-V module creation

src/graphics/host_gpu/vulkanCommon.h

@@ -15,6 +15,7 @@
 
 #include <cstdint>
 #include <fmt/format.h>
+#include <span>
 #include <string>
 #include <utility>
 #include <vector>
@@ -27,6 +28,7 @@ using VulkanMemoryBarrier = vk::MemoryBarrier;
 
 vk::Format  VulkanFormat(Prospero::BufferFormat guest_format);
 void        RequireVulkanSuccess(vk::Result result, const char* operation);
+vk::ShaderModule CompileSPV(std::span<const uint32_t> code, vk::Device device);
 
 template <typename Handle, typename... Args>
 void SetVulkanObjectNameF(vk::Device device, Handle handle, fmt::format_string<Args...> format,