surface: Add basic surface enumerator

Signed-off-by: Daniel Silverstone <dsilvers@digital-scurf.org>

2 files changed, 26 insertions, 0 deletions

diff --git a/include/libnsfb.h b/include/libnsfb.h
index dfb720c..d52d821 100644
--- a/include/libnsfb.h
+++ b/include/libnsfb.h
@@ -58,6 +58,21 @@ enum nsfb_format_e {
     NSFB_FMT_I1, /* black and white */
 };
 
+/** Callback for surface enumeration
+ *
+ * @param The context you gave for the enumeration
+ * @param The name of a surface registered with libnsfb
+ * @param The type of that surface for use with ::nsfb_new
+ */
+typedef void (*surface_enumeration_cb)(void *, const char *, enum nsfb_type_e);
+
+/** Enumerate surface types registered with libnsfb
+ *
+ * @param cb The callback to call with each surface
+ * @param context The context to pass to the enumeration callback
+ */
+void nsfb_enumerate_surface_types(surface_enumeration_cb cb, void *context);
+
 /** Select frontend type from a name.
  * 
  * @param name The name to select a frontend.
diff --git a/src/surface/surface.c b/src/surface/surface.c
index f3127bd..426efa9 100644
--- a/src/surface/surface.c
+++ b/src/surface/surface.c
@@ -151,6 +151,17 @@ nsfb_type_from_name(const char *name)
     return NSFB_SURFACE_NONE;
 }
 
+/* exported interface defined in libnsfb.h */
+void
+nsfb_enumerate_surface_types(surface_enumeration_cb cb, void *context)
+{
+    int fend_loop;
+
+    for (fend_loop = 0; fend_loop < surface_count; fend_loop++) {
+	cb(context, surfaces[fend_loop].name, surfaces[fend_loop].type);
+    }
+}
+
 /*
  * Local variables:
  *  c-basic-offset: 4