From 772c4d6313ad842bbdfe101267f0bd34186e8a6f Mon Sep 17 00:00:00 2001
From: Campbell Barton <ideasman42@gmail.com>
Date: Mon, 8 Oct 2018 17:29:59 +1100
Subject: Edit Mesh: basic show in edit mode support

Note this is just using the derived-mesh data at the moment,
to support this properly we'll need to remove derived-mesh.
---
 source/blender/blenkernel/BKE_cdderivedmesh.h    |  2 ++
 source/blender/blenkernel/intern/cdderivedmesh.c | 26 ++++++++++++++++++++++++
 2 files changed, 28 insertions(+)

(limited to 'source/blender/blenkernel')

diff --git a/source/blender/blenkernel/BKE_cdderivedmesh.h b/source/blender/blenkernel/BKE_cdderivedmesh.h
index 6d96bd6ab7c..b31a3548a1e 100644
--- a/source/blender/blenkernel/BKE_cdderivedmesh.h
+++ b/source/blender/blenkernel/BKE_cdderivedmesh.h
@@ -178,4 +178,6 @@ void CDDM_set_mface(struct DerivedMesh *dm, struct MFace *mface);
 void CDDM_set_mloop(struct DerivedMesh *dm, struct MLoop *mloop);
 void CDDM_set_mpoly(struct DerivedMesh *dm, struct MPoly *mpoly);
 
+void CDDM_to_mesh__fast_borrow(struct DerivedMesh *dm, struct Mesh *me, const struct Mesh *me_reference);
+
 #endif
diff --git a/source/blender/blenkernel/intern/cdderivedmesh.c b/source/blender/blenkernel/intern/cdderivedmesh.c
index 9043460562d..83424da3a3d 100644
--- a/source/blender/blenkernel/intern/cdderivedmesh.c
+++ b/source/blender/blenkernel/intern/cdderivedmesh.c
@@ -2258,3 +2258,29 @@ void CDDM_set_mpoly(DerivedMesh *dm, MPoly *mpoly)
 
 	cddm->mpoly = mpoly;
 }
+
+/** Hack to fill in an empty (non library mesh struct) with CDDM values. */
+void CDDM_to_mesh__fast_borrow(DerivedMesh *dm, Mesh *me, const Mesh *me_reference)
+{
+	CDDerivedMesh *cddm = (CDDerivedMesh *)dm;
+	me->totvert = cddm->dm.numVertData;
+	me->totedge = cddm->dm.numEdgeData;
+	me->totloop = cddm->dm.numLoopData;
+	me->totpoly = cddm->dm.numPolyData;
+
+	me->mvert = cddm->mvert;
+	me->medge = cddm->medge;
+	me->mface = cddm->mface;
+	me->mloop = cddm->mloop;
+	me->mpoly = cddm->mpoly;
+
+	me->vdata = dm->vertData;
+	me->edata = dm->edgeData;
+	me->ldata = dm->loopData;
+	me->pdata = dm->polyData;
+
+	if (me_reference) {
+		me->mat = me_reference->mat;
+		me->totcol = me_reference->totcol;
+	}
+}
-- 
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