1 files changed, 35 insertions, 0 deletions
diff --git a/include/frontend.h b/include/frontend.h
new file mode 100644
index 0000000..ee76632
--- /dev/null
+++ b/include/frontend.h
@@ -0,0 +1,35 @@
+#include "libnsfb.h" /* exported interface */
+#include "nsfb.h"
+
+/* frontend default options */
+typedef int (nsfb_fendfn_defaults_t)(nsfb_t *nsfb);
+/* frontend init */
+typedef int (nsfb_fendfn_init_t)(nsfb_t *nsfb);
+/* frontend finalise */
+typedef int (nsfb_fendfn_fini_t)(nsfb_t *nsfb);
+/* frontend input */
+typedef int (nsfb_fendfn_input_t)(nsfb_t *nsfb);
+/* frontend area claim */
+typedef int (nsfb_fendfn_claim_t)(nsfb_t *nsfb, nsfb_bbox_t *box);
+/* frontend area release */
+typedef int (nsfb_fendfn_release_t)(nsfb_t *nsfb, nsfb_bbox_t *box);
+
+typedef struct nsfb_frontend_rtns_s {
+    nsfb_fendfn_defaults_t *defaults;
+    nsfb_fendfn_init_t *initialise;
+    nsfb_fendfn_fini_t *finalise;
+    nsfb_fendfn_input_t *input;
+    nsfb_fendfn_claim_t *claim;
+    nsfb_fendfn_release_t *release;
+} nsfb_frontend_rtns_t;
+
+void _nsfb_register_frontend(const enum nsfb_frontend_e type, const nsfb_frontend_rtns_t *rtns, const char *name);
+
+nsfb_frontend_rtns_t *nsfb_frontend_get_rtns(enum nsfb_frontend_e type);
+
+/* macro which adds a builtin command with no argument limits */
+#define NSFB_FRONTEND_DEF(__name, __type, __rtns)                       \
+    static void __name##_register_frontend(void) __attribute__((constructor)); \
+    void __name##_register_frontend(void) {                              \
+        _nsfb_register_frontend(__type, __rtns, #__name);               \
+    }