graphics: count occlusion queries on the host GPU behind --occlusion-queries

src/main.cpp

@@ -78,6 +78,7 @@ static void PrintUsage() {
 	         "                                       Implies --vulkan-validation; very slow.\n");
 	::printf("  --shader-validation                  Enable shader validation.\n");
 	::printf("  --tessellation                      Draw tessellation patches; skipped by default.\n");
+	::printf("  --occlusion-queries                  Count occlusion query samples on the GPU.\n");
 	::printf("  --shader-optimization-type <value>   None, Size, or Performance.\n");
 	::printf("  --shader-log-direction <value>       Silent, Console, or File.\n");
 	::printf("  --shader-log-folder <path>           Shader log output folder.\n");
@@ -202,6 +203,7 @@ static constexpr Flag FLAGS[] = {
     {"--gpu-assisted-validation", &ConfigOptions::gpu_assisted_validation_enabled},
     {"--shader-validation", &ConfigOptions::shader_validation_enabled},
     {"--tessellation", &ConfigOptions::tessellation_enabled},
+    {"--occlusion-queries", &ConfigOptions::occlusion_queries_enabled},
     {"--command-buffer-dump", &ConfigOptions::command_buffer_dump_enabled},
     {"--graphics-debug-dump", &ConfigOptions::graphics_debug_dump_enabled},
     {"--profile", &ConfigOptions::profiler_enabled},