DRW: minor optimization for edit-mesh conversion

Finding visible connected elements is often a direct lookup
when they're not connected to hidden geometry.

Add inline wrappers that avoid a function call,
gives minor speedup creating GPU edit-mesh data.

1 files changed, 38 insertions, 4 deletions

diff --git a/source/blender/draw/intern/draw_cache_impl_mesh.c b/source/blender/draw/intern/draw_cache_impl_mesh.c
index 3e1b6b6c020..4e064111245 100644
--- a/source/blender/draw/intern/draw_cache_impl_mesh.c
+++ b/source/blender/draw/intern/draw_cache_impl_mesh.c
@@ -85,6 +85,40 @@ enum {
 };
 
 /* ---------------------------------------------------------------------- */
+/** \name BMesh Inline Wrappers
+ * \{ */
+
+/**
+ * Wrapper for #BM_vert_find_first_loop_visible
+ * since most of the time this can be accessed directly without a function call.
+ */
+BLI_INLINE BMLoop *bm_vert_find_first_loop_visible_inline(BMVert *v)
+{
+	if (v->e) {
+		BMLoop *l = v->e->l;
+		if (l && !BM_elem_flag_test(l->f, BM_ELEM_HIDDEN)) {
+			return l->v == v ? l : l->next;
+		}
+		return BM_vert_find_first_loop_visible(v);
+	}
+	return NULL;
+}
+
+BLI_INLINE BMLoop *bm_edge_find_first_loop_visible_inline(BMEdge *e)
+{
+	if (e->l) {
+		BMLoop *l = e->l;
+		if (!BM_elem_flag_test(l->f, BM_ELEM_HIDDEN)) {
+			return l;
+		}
+		return BM_edge_find_first_loop_visible(e);
+	}
+	return NULL;
+}
+
+/** \} */
+
+/* ---------------------------------------------------------------------- */
 /** \name Mesh/BMesh Interface (direct access to basic data).
  * \{ */
 
@@ -3426,8 +3460,8 @@ static void mesh_create_loops_lines(
 				if (!BM_elem_flag_test(bm_edge, BM_ELEM_HIDDEN) &&
 				    bm_edge->l != NULL)
 				{
-					BMLoop *bm_loop1 = BM_vert_find_first_loop_visible(bm_edge->v1);
-					BMLoop *bm_loop2 = BM_vert_find_first_loop_visible(bm_edge->v2);
+					BMLoop *bm_loop1 = bm_vert_find_first_loop_visible_inline(bm_edge->v1);
+					BMLoop *bm_loop2 = bm_vert_find_first_loop_visible_inline(bm_edge->v2);
 					int v1 = BM_elem_index_get(bm_loop1);
 					int v2 = BM_elem_index_get(bm_loop2);
 					if (v1 > v2) {
@@ -3669,7 +3703,7 @@ static void mesh_create_edit_loops_points_lines(MeshRenderData *rdata, GPUIndexB
 			BMEdge *eed;
 			BM_ITER_MESH (eed, &iter, bm, BM_EDGES_OF_MESH) {
 				if (!BM_elem_flag_test(eed, BM_ELEM_HIDDEN)) {
-					BMLoop *l = BM_edge_find_first_loop_visible(eed);
+					BMLoop *l = bm_edge_find_first_loop_visible_inline(eed);
 					if (l != NULL) {
 						int v1 = BM_elem_index_get(eed->l);
 						int v2 = BM_elem_index_get(eed->l->next);
@@ -3683,7 +3717,7 @@ static void mesh_create_edit_loops_points_lines(MeshRenderData *rdata, GPUIndexB
 			BMVert *eve;
 			BM_ITER_MESH (eve, &iter, bm, BM_VERTS_OF_MESH) {
 				if (!BM_elem_flag_test(eve, BM_ELEM_HIDDEN)) {
-					BMLoop *l = BM_vert_find_first_loop_visible(eve);
+					BMLoop *l = bm_vert_find_first_loop_visible_inline(eve);
 					if (l != NULL) {
 						int v = BM_elem_index_get(l);
 						GPU_indexbuf_add_generic_vert(&elb_vert, v);