-tdm_error virtual_output_get_capability(tdm_output *output, tdm_caps_output *caps);
-tdm_layer** virtual_output_get_layers(tdm_output *output, int *count, tdm_error *error);
-tdm_error virtual_output_wait_vblank(tdm_output *output, int interval, int sync, void *user_data);
-tdm_error virtual_output_set_vblank_handler(tdm_output *output, tdm_output_vblank_handler func);
-tdm_error virtual_output_commit(tdm_output *output, int sync, void *user_data);
-tdm_error virtual_output_set_commit_handler(tdm_output *output, tdm_output_commit_handler func);
-tdm_error virtual_output_set_mode(tdm_output *output, const tdm_output_mode *mode);
-tdm_error virtual_output_get_mode(tdm_output *output, const tdm_output_mode **mode);
+tdm_error virtual_output_get_capability(tdm_output *output, tdm_caps_output *caps);
+tdm_layer **virtual_output_get_layers(tdm_output *output, int *count, tdm_error *error);
+tdm_error virtual_output_wait_vblank(tdm_output *output, int interval, int sync, void *user_data);
+tdm_error virtual_output_set_vblank_handler(tdm_output *output, tdm_output_vblank_handler func);
+tdm_error virtual_output_commit(tdm_output *output, int sync, void *user_data);
+tdm_error virtual_output_set_commit_handler(tdm_output *output, tdm_output_commit_handler func);
+tdm_error virtual_output_set_mode(tdm_output *output, const tdm_output_mode *mode);
+tdm_error virtual_output_get_mode(tdm_output *output, const tdm_output_mode **mode);