Merge branch 'blender2.8' into soc-2018-bevel

34 files changed, 279 insertions, 232 deletions

diff --git a/source/blender/modifiers/intern/MOD_armature.c b/source/blender/modifiers/intern/MOD_armature.c
index 09ba865cce3..c44b65dffec 100644
--- a/source/blender/modifiers/intern/MOD_armature.c
+++ b/source/blender/modifiers/intern/MOD_armature.c
@@ -64,14 +64,14 @@ static void initData(ModifierData *md)
 	amd->deformflag = ARM_DEF_VGROUP;
 }
 
-static void copyData(const ModifierData *md, ModifierData *target)
+static void copyData(const ModifierData *md, ModifierData *target, const int flag)
 {
 #if 0
 	const ArmatureModifierData *amd = (const ArmatureModifierData *) md;
 #endif
 	ArmatureModifierData *tamd = (ArmatureModifierData *) target;
 
-	modifier_copyData_generic(md, target);
+	modifier_copyData_generic(md, target, flag);
 	tamd->prevCos = NULL;
 }
 
@@ -85,7 +85,7 @@ static CustomDataMask requiredDataMask(Object *UNUSED(ob), ModifierData *UNUSED(
 	return dataMask;
 }
 
-static bool isDisabled(const struct Scene *UNUSED(scene), ModifierData *md, int UNUSED(useRenderParams))
+static bool isDisabled(const struct Scene *UNUSED(scene), ModifierData *md, bool UNUSED(useRenderParams))
 {
 	ArmatureModifierData *amd = (ArmatureModifierData *) md;
 
diff --git a/source/blender/modifiers/intern/MOD_boolean.c b/source/blender/modifiers/intern/MOD_boolean.c
index 6cea7b8fece..db1078fa677 100644
--- a/source/blender/modifiers/intern/MOD_boolean.c
+++ b/source/blender/modifiers/intern/MOD_boolean.c
@@ -76,7 +76,7 @@ static void initData(ModifierData *md)
 	bmd->double_threshold = 1e-6f;
 }
 
-static bool isDisabled(const struct Scene *UNUSED(scene), ModifierData *md, int UNUSED(useRenderParams))
+static bool isDisabled(const struct Scene *UNUSED(scene), ModifierData *md, bool UNUSED(useRenderParams))
 {
 	BooleanModifierData *bmd = (BooleanModifierData *) md;
 
diff --git a/source/blender/modifiers/intern/MOD_cast.c b/source/blender/modifiers/intern/MOD_cast.c
index cd6cd709b1d..a0901b6d838 100644
--- a/source/blender/modifiers/intern/MOD_cast.c
+++ b/source/blender/modifiers/intern/MOD_cast.c
@@ -63,7 +63,7 @@ static void initData(ModifierData *md)
 	cmd->object = NULL;
 }
 
-static bool isDisabled(const struct Scene *UNUSED(scene), ModifierData *md, int UNUSED(useRenderParams))
+static bool isDisabled(const struct Scene *UNUSED(scene), ModifierData *md, bool UNUSED(useRenderParams))
 {
 	CastModifierData *cmd = (CastModifierData *) md;
 	short flag;
diff --git a/source/blender/modifiers/intern/MOD_cloth.c b/source/blender/modifiers/intern/MOD_cloth.c
index 58979fa201b..53e71bfc1a4 100644
--- a/source/blender/modifiers/intern/MOD_cloth.c
+++ b/source/blender/modifiers/intern/MOD_cloth.c
@@ -42,6 +42,7 @@
 
 #include "MEM_guardedalloc.h"
 
+#include "BLI_listbase.h"
 #include "BLI_utildefines.h"
 
 #include "BKE_cloth.h"
@@ -155,7 +156,7 @@ static CustomDataMask requiredDataMask(Object *UNUSED(ob), ModifierData *md)
 	return dataMask;
 }
 
-static void copyData(const ModifierData *md, ModifierData *target)
+static void copyData(const ModifierData *md, ModifierData *target, const int flag)
 {
 	const ClothModifierData *clmd = (const ClothModifierData *) md;
 	ClothModifierData *tclmd = (ClothModifierData *) target;
@@ -170,14 +171,21 @@ static void copyData(const ModifierData *md, ModifierData *target)
 		MEM_freeN(tclmd->coll_parms);
 
 	BKE_ptcache_free_list(&tclmd->ptcaches);
-	tclmd->point_cache = NULL;
+	if (flag & LIB_ID_CREATE_NO_MAIN) {
+		/* Share the cache with the original object's modifier. */
+		tclmd->modifier.flag |= eModifierFlag_SharedCaches;
+		tclmd->ptcaches = clmd->ptcaches;
+		tclmd->point_cache = clmd->point_cache;
+	}
+	else {
+		tclmd->point_cache = BKE_ptcache_add(&tclmd->ptcaches);
+		tclmd->point_cache->step = 1;
+	}
 
 	tclmd->sim_parms = MEM_dupallocN(clmd->sim_parms);
 	if (clmd->sim_parms->effector_weights)
 		tclmd->sim_parms->effector_weights = MEM_dupallocN(clmd->sim_parms->effector_weights);
 	tclmd->coll_parms = MEM_dupallocN(clmd->coll_parms);
-	tclmd->point_cache = BKE_ptcache_add(&tclmd->ptcaches);
-	tclmd->point_cache->step = 1;
 	tclmd->clothObject = NULL;
 	tclmd->hairdata = NULL;
 	tclmd->solver_result = NULL;
@@ -206,7 +214,12 @@ static void freeData(ModifierData *md)
 		if (clmd->coll_parms)
 			MEM_freeN(clmd->coll_parms);
 
-		BKE_ptcache_free_list(&clmd->ptcaches);
+		if (md->flag & eModifierFlag_SharedCaches) {
+			BLI_listbase_clear(&clmd->ptcaches);
+		}
+		else {
+			BKE_ptcache_free_list(&clmd->ptcaches);
+		}
 		clmd->point_cache = NULL;
 
 		if (clmd->hairdata)
diff --git a/source/blender/modifiers/intern/MOD_correctivesmooth.c b/source/blender/modifiers/intern/MOD_correctivesmooth.c
index 879b07de6d9..d59360896e8 100644
--- a/source/blender/modifiers/intern/MOD_correctivesmooth.c
+++ b/source/blender/modifiers/intern/MOD_correctivesmooth.c
@@ -80,12 +80,12 @@ static void initData(ModifierData *md)
 }
 
 
-static void copyData(const ModifierData *md, ModifierData *target)
+static void copyData(const ModifierData *md, ModifierData *target, const int flag)
 {
 	const CorrectiveSmoothModifierData *csmd = (const CorrectiveSmoothModifierData *)md;
 	CorrectiveSmoothModifierData *tcsmd = (CorrectiveSmoothModifierData *)target;
 
-	modifier_copyData_generic(md, target);
+	modifier_copyData_generic(md, target, flag);
 
 	if (csmd->bind_coords) {
 		tcsmd->bind_coords = MEM_dupallocN(csmd->bind_coords);
diff --git a/source/blender/modifiers/intern/MOD_curve.c b/source/blender/modifiers/intern/MOD_curve.c
index e90ff939b68..b74b63e2478 100644
--- a/source/blender/modifiers/intern/MOD_curve.c
+++ b/source/blender/modifiers/intern/MOD_curve.c
@@ -71,7 +71,7 @@ static CustomDataMask requiredDataMask(Object *UNUSED(ob), ModifierData *md)
 	return dataMask;
 }
 
-static bool isDisabled(const Scene *UNUSED(scene), ModifierData *md, int UNUSED(userRenderParams))
+static bool isDisabled(const Scene *UNUSED(scene), ModifierData *md, bool UNUSED(userRenderParams))
 {
 	CurveModifierData *cmd = (CurveModifierData *) md;
 
diff --git a/source/blender/modifiers/intern/MOD_datatransfer.c b/source/blender/modifiers/intern/MOD_datatransfer.c
index 8e025059d6c..ac45ce8732d 100644
--- a/source/blender/modifiers/intern/MOD_datatransfer.c
+++ b/source/blender/modifiers/intern/MOD_datatransfer.c
@@ -133,7 +133,7 @@ static void updateDepsgraph(ModifierData *md, const ModifierUpdateDepsgraphConte
 	}
 }
 
-static bool isDisabled(const struct Scene *UNUSED(scene), ModifierData *md, int UNUSED(useRenderParams))
+static bool isDisabled(const struct Scene *UNUSED(scene), ModifierData *md, bool UNUSED(useRenderParams))
 {
 	DataTransferModifierData *dtmd = (DataTransferModifierData *) md;
 	/* If no source object, bypass. */
diff --git a/source/blender/modifiers/intern/MOD_displace.c b/source/blender/modifiers/intern/MOD_displace.c
index ac8fb91bc8d..1b8b7120058 100644
--- a/source/blender/modifiers/intern/MOD_displace.c
+++ b/source/blender/modifiers/intern/MOD_displace.c
@@ -138,7 +138,7 @@ static void foreachTexLink(
 	walk(userData, ob, md, "texture");
 }
 
-static bool isDisabled(const struct Scene *UNUSED(scene), ModifierData *md, int UNUSED(useRenderParams))
+static bool isDisabled(const struct Scene *UNUSED(scene), ModifierData *md, bool UNUSED(useRenderParams))
 {
 	DisplaceModifierData *dmd = (DisplaceModifierData *) md;
 	return ((!dmd->texture && dmd->direction == MOD_DISP_DIR_RGB_XYZ) || dmd->strength == 0.0f);
diff --git a/source/blender/modifiers/intern/MOD_dynamicpaint.c b/source/blender/modifiers/intern/MOD_dynamicpaint.c
index 9131bc0659f..61219096b43 100644
--- a/source/blender/modifiers/intern/MOD_dynamicpaint.c
+++ b/source/blender/modifiers/intern/MOD_dynamicpaint.c
@@ -57,7 +57,7 @@ static void initData(ModifierData *md)
 	pmd->type = MOD_DYNAMICPAINT_TYPE_CANVAS;
 }
 
-static void copyData(const ModifierData *md, ModifierData *target)
+static void copyData(const ModifierData *md, ModifierData *target, const int UNUSED(flag))
 {
 	const DynamicPaintModifierData *pmd  = (const DynamicPaintModifierData *)md;
 	DynamicPaintModifierData *tpmd = (DynamicPaintModifierData *)target;
diff --git a/source/blender/modifiers/intern/MOD_explode.c b/source/blender/modifiers/intern/MOD_explode.c
index 948aaf0751e..04bfe96bc59 100644
--- a/source/blender/modifiers/intern/MOD_explode.c
+++ b/source/blender/modifiers/intern/MOD_explode.c
@@ -70,14 +70,14 @@ static void freeData(ModifierData *md)
 
 	MEM_SAFE_FREE(emd->facepa);
 }
-static void copyData(const ModifierData *md, ModifierData *target)
+static void copyData(const ModifierData *md, ModifierData *target, const int flag)
 {
 #if 0
 	const ExplodeModifierData *emd = (const ExplodeModifierData *) md;
 #endif
 	ExplodeModifierData *temd = (ExplodeModifierData *) target;
 
-	modifier_copyData_generic(md, target);
+	modifier_copyData_generic(md, target, flag);
 
 	temd->facepa = NULL;
 }
diff --git a/source/blender/modifiers/intern/MOD_fluidsim.c b/source/blender/modifiers/intern/MOD_fluidsim.c
index ffa74be0b33..ebea7250d18 100644
--- a/source/blender/modifiers/intern/MOD_fluidsim.c
+++ b/source/blender/modifiers/intern/MOD_fluidsim.c
@@ -33,14 +33,13 @@
  */
 
 
+#include "DNA_mesh_types.h"
 #include "DNA_scene_types.h"
 #include "DNA_object_fluidsim_types.h"
 #include "DNA_object_types.h"
 
 #include "BLI_utildefines.h"
 
-
-#include "BKE_cdderivedmesh.h"
 #include "BKE_layer.h"
 #include "BKE_modifier.h"
 
@@ -65,45 +64,49 @@ static void freeData(ModifierData *md)
 	fluidsim_free(fluidmd);
 }
 
-static void copyData(const ModifierData *md, ModifierData *target)
+static void copyData(const ModifierData *md, ModifierData *target, const int UNUSED(flag))
 {
 	const FluidsimModifierData *fluidmd = (const FluidsimModifierData *) md;
 	FluidsimModifierData *tfluidmd = (FluidsimModifierData *) target;
 
-	if (fluidmd->fss) {
-		tfluidmd->fss = MEM_dupallocN(fluidmd->fss);
-		if (tfluidmd->fss && (tfluidmd->fss->meshVelocities != NULL)) {
-			tfluidmd->fss->meshVelocities = MEM_dupallocN(tfluidmd->fss->meshVelocities);
-		}
+	/* Free any FSS that was allocated in initData() */
+	if (tfluidmd->fss) {
+		MEM_SAFE_FREE(tfluidmd->fss->meshVelocities);
+		MEM_freeN(tfluidmd->fss);
 	}
 
-	/* Seems to never be used, but for sqke of consistency... */
-	BLI_assert(fluidmd->point_cache == NULL);
-	BLI_assert(tfluidmd->point_cache == NULL);
-	tfluidmd->point_cache = NULL;
+	if (fluidmd->fss == NULL) {
+		tfluidmd->fss = NULL;
+		return;
+	}
+
+	tfluidmd->fss = MEM_dupallocN(fluidmd->fss);
+	if (tfluidmd->fss->meshVelocities != NULL) {
+		tfluidmd->fss->meshVelocities = MEM_dupallocN(tfluidmd->fss->meshVelocities);
+	}
 }
 
 
 
-static DerivedMesh *applyModifier(
+static Mesh *applyModifier(
         ModifierData *md, const ModifierEvalContext *ctx,
-        DerivedMesh *dm)
+        Mesh *mesh)
 {
 	FluidsimModifierData *fluidmd = (FluidsimModifierData *) md;
-	DerivedMesh *result = NULL;
+	Mesh *result = NULL;
 
 	/* check for alloc failing */
 	if (!fluidmd->fss) {
 		initData(md);
 
 		if (!fluidmd->fss) {
-			return dm;
+			return mesh;
 		}
 	}
 
-	result = fluidsimModifier_do(fluidmd, ctx, dm);
+	result = fluidsimModifier_do(fluidmd, ctx, mesh);
 
-	return result ? result : dm;
+	return result ? result : mesh;
 }
 
 static void updateDepsgraph(ModifierData *md, const ModifierUpdateDepsgraphContext *ctx)
@@ -150,14 +153,14 @@ ModifierTypeInfo modifierType_Fluidsim = {
 	/* deformMatrices_DM */ NULL,
 	/* deformVertsEM_DM */  NULL,
 	/* deformMatricesEM_DM*/NULL,
-	/* applyModifier_DM */  applyModifier,
+	/* applyModifier_DM */  NULL,
 	/* applyModifierEM_DM */NULL,
 
 	/* deformVerts */       NULL,
 	/* deformMatrices */    NULL,
 	/* deformVertsEM */     NULL,
 	/* deformMatricesEM */  NULL,
-	/* applyModifier */     NULL,
+	/* applyModifier */     applyModifier,
 	/* applyModifierEM */   NULL,
 
 	/* initData */          initData,
diff --git a/source/blender/modifiers/intern/MOD_fluidsim_util.c b/source/blender/modifiers/intern/MOD_fluidsim_util.c
index cea9e69526c..44079163de5 100644
--- a/source/blender/modifiers/intern/MOD_fluidsim_util.c
+++ b/source/blender/modifiers/intern/MOD_fluidsim_util.c
@@ -47,8 +47,8 @@
 #include "BLI_utildefines.h"
 
 #include "BKE_fluidsim.h" /* ensure definitions here match */
-#include "BKE_cdderivedmesh.h"
 #include "BKE_main.h"
+#include "BKE_mesh.h"
 #ifdef WITH_MOD_FLUID
 #  include "BKE_global.h"
 #endif
@@ -160,22 +160,18 @@ void fluidsim_free(FluidsimModifierData *fluidmd)
 		MEM_SAFE_FREE(fluidmd->fss);
 	}
 
-	/* Seems to never be used, but for sqke of consistency... */
-	BLI_assert(fluidmd->point_cache == NULL);
-	fluidmd->point_cache = NULL;
-
 	return;
 }
 
 #ifdef WITH_MOD_FLUID
 /* read .bobj.gz file into a fluidsimDerivedMesh struct */
-static DerivedMesh *fluidsim_read_obj(const char *filename, const MPoly *mp_example)
+static Mesh *fluidsim_read_obj(const char *filename, const MPoly *mp_example)
 {
 	int wri = 0, i;
 	int gotBytes;
 	gzFile gzf;
 	int numverts = 0, numfaces = 0;
-	DerivedMesh *dm = NULL;
+	Mesh *mesh = NULL;
 	MPoly *mp;
 	MLoop *ml;
 	MVert *mv;
@@ -224,9 +220,9 @@ static DerivedMesh *fluidsim_read_obj(const char *filename, const MPoly *mp_exam
 		return NULL;
 	}
 
-	dm = CDDM_new(numverts, 0, 0, numfaces * 3, numfaces);
+	mesh = BKE_mesh_new_nomain(numverts, 0, 0, numfaces * 3, numfaces);
 
-	if (!dm) {
+	if (!mesh) {
 		gzclose(gzf);
 		return NULL;
 	}
@@ -235,7 +231,7 @@ static DerivedMesh *fluidsim_read_obj(const char *filename, const MPoly *mp_exam
 	gotBytes = gzread(gzf, &wri, sizeof(wri));
 
 	/* read vertex position from file */
-	mv = CDDM_get_verts(dm);
+	mv = mesh->mvert;
 
 	for (i = 0; i < numverts; i++, mv++)
 		gotBytes = gzread(gzf, mv->co, sizeof(float) * 3);
@@ -243,16 +239,16 @@ static DerivedMesh *fluidsim_read_obj(const char *filename, const MPoly *mp_exam
 	/* should be the same as numverts */
 	gotBytes = gzread(gzf, &wri, sizeof(wri));
 	if (wri != numverts) {
-		if (dm)
-			dm->release(dm);
+		if (mesh)
+			BKE_id_free(NULL, mesh);
 		gzclose(gzf);
 		return NULL;
 	}
 
 	normals = MEM_calloc_arrayN(numverts, 3 * sizeof(short), "fluid_tmp_normals");
 	if (!normals) {
-		if (dm)
-			dm->release(dm);
+		if (mesh)
+			BKE_id_free(NULL, mesh);
 		gzclose(gzf);
 		return NULL;
 	}
@@ -268,16 +264,16 @@ static DerivedMesh *fluidsim_read_obj(const char *filename, const MPoly *mp_exam
 
 	if (wri != numfaces) {
 		printf("Fluidsim: error in reading data from file.\n");
-		if (dm)
-			dm->release(dm);
+		if (mesh)
+			BKE_id_free(NULL, mesh);
 		gzclose(gzf);
 		MEM_freeN(normals);
 		return NULL;
 	}
 
 	/* read triangles from file */
-	mp = CDDM_get_polys(dm);
-	ml = CDDM_get_loops(dm);
+	mp = mesh->mpoly;
+	ml = mesh->mloop;
 	for (i = 0; i < numfaces; i++, mp++, ml += 3) {
 		int face[3];
 
@@ -298,13 +294,12 @@ static DerivedMesh *fluidsim_read_obj(const char *filename, const MPoly *mp_exam
 
 	gzclose(gzf);
 
-	CDDM_calc_edges(dm);
-
-	CDDM_apply_vert_normals(dm, (short (*)[3])normals);
+	BKE_mesh_calc_edges(mesh, false, false);
+	BKE_mesh_apply_vert_normals(mesh, (short (*)[3])normals);
 	MEM_freeN(normals);
 
 	// CDDM_calc_normals(result);
-	return dm;
+	return mesh;
 }
 
 
@@ -374,14 +369,14 @@ void fluid_estimate_memory(Object *ob, FluidsimSettings *fss, char *value)
 
 
 /* read zipped fluidsim velocities into the co's of the fluidsimsettings normals struct */
-static void fluidsim_read_vel_cache(FluidsimModifierData *fluidmd, DerivedMesh *dm, char *filename)
+static void fluidsim_read_vel_cache(FluidsimModifierData *fluidmd, Mesh *mesh, char *filename)
 {
 	int wri, i, j;
 	float wrf;
 	gzFile gzf;
 	FluidsimSettings *fss = fluidmd->fss;
 	int len = strlen(filename);
-	int totvert = dm->getNumVerts(dm);
+	int totvert = mesh->totvert;
 	FluidVertexVelocity *velarray = NULL;
 
 	/* mesh and vverts have to be valid from loading... */
@@ -395,7 +390,7 @@ static void fluidsim_read_vel_cache(FluidsimModifierData *fluidmd, DerivedMesh *
 
 	if (fss->domainNovecgen > 0) return;
 
-	fss->meshVelocities = MEM_calloc_arrayN(dm->getNumVerts(dm), sizeof(FluidVertexVelocity), "Fluidsim_velocities");
+	fss->meshVelocities = MEM_calloc_arrayN(mesh->totvert, sizeof(FluidVertexVelocity), "Fluidsim_velocities");
 	fss->totvert = totvert;
 
 	velarray = fss->meshVelocities;
@@ -430,8 +425,8 @@ static void fluidsim_read_vel_cache(FluidsimModifierData *fluidmd, DerivedMesh *
 	gzclose(gzf);
 }
 
-static DerivedMesh *fluidsim_read_cache(
-        Object *ob, DerivedMesh *orgdm,
+static Mesh *fluidsim_read_cache(
+        Object *ob, Mesh *orgmesh,
         FluidsimModifierData *fluidmd, int framenr, int useRenderParams)
 {
 	int curFrame = framenr /* - 1 */ /*scene->r.sfra*/; /* start with 0 at start frame */
@@ -440,7 +435,7 @@ static DerivedMesh *fluidsim_read_cache(
 
 	char targetFile[FILE_MAX];
 	FluidsimSettings *fss = fluidmd->fss;
-	DerivedMesh *dm = NULL;
+	Mesh *newmesh = NULL;
 	MPoly *mpoly;
 	MPoly mp_example = {0};
 
@@ -469,17 +464,17 @@ static DerivedMesh *fluidsim_read_cache(
 	BLI_path_abs(targetFile, modifier_path_relbase_from_global(ob));
 	BLI_path_frame(targetFile, curFrame, 0); // fixed #frame-no
 
-	/* assign material + flags to new dm
-	 * if there's no faces in original dm, keep materials and flags unchanged */
-	mpoly = orgdm->getPolyArray(orgdm);
+	/* assign material + flags to new mesh.
+	 * if there's no faces in original mesh, keep materials and flags unchanged */
+	mpoly = orgmesh->mpoly;
 	if (mpoly) {
 		mp_example = *mpoly;
 	}
 	/* else leave NULL'd */
 
-	dm = fluidsim_read_obj(targetFile, &mp_example);
+	newmesh = fluidsim_read_obj(targetFile, &mp_example);
 
-	if (!dm) {
+	if (!newmesh) {
 		/* switch, abort background rendering when fluidsim mesh is missing */
 		const char *strEnvName2 = "BLENDER_ELBEEMBOBJABORT"; // from blendercall.cpp
 
@@ -494,7 +489,7 @@ static DerivedMesh *fluidsim_read_cache(
 			}
 		}
 
-		/* display org. object upon failure which is in dm */
+		/* display org. object upon failure which is in new mesh */
 		return NULL;
 	}
 
@@ -502,7 +497,7 @@ static DerivedMesh *fluidsim_read_cache(
 	 * TODO? use generate flag as loading flag as well?
 	 * warning, needs original .bobj.gz mesh loading filename */
 	if (displaymode == OB_FSDOM_FINAL) {
-		fluidsim_read_vel_cache(fluidmd, dm, targetFile);
+		fluidsim_read_vel_cache(fluidmd, newmesh, targetFile);
 	}
 	else {
 		if (fss->meshVelocities)
@@ -511,21 +506,21 @@ static DerivedMesh *fluidsim_read_cache(
 		fss->meshVelocities = NULL;
 	}
 
-	return dm;
+	return newmesh;
 }
 #endif // WITH_MOD_FLUID
 
-DerivedMesh *fluidsimModifier_do(
+Mesh *fluidsimModifier_do(
         FluidsimModifierData *fluidmd,
         const ModifierEvalContext *ctx,
-        DerivedMesh *dm)
+        Mesh *mesh)
 {
 #ifdef WITH_MOD_FLUID
 	Object *ob = ctx->object;
 	Depsgraph *depsgraph = ctx->depsgraph;
 	const bool useRenderParams = (ctx->flag & MOD_APPLY_RENDER) != 0;
 //	const bool isFinalCalc = (ctx->flag & MOD_APPLY_USECACHE) != 0;
-	DerivedMesh *result = NULL;
+	Mesh *result = NULL;
 	int framenr;
 	FluidsimSettings *fss = NULL;
 
@@ -533,11 +528,11 @@ DerivedMesh *fluidsimModifier_do(
 
 	/* only handle fluidsim domains */
 	if (fluidmd && fluidmd->fss && (fluidmd->fss->type != OB_FLUIDSIM_DOMAIN))
-		return dm;
+		return mesh;
 
 	/* sanity check */
 	if (!fluidmd || !fluidmd->fss)
-		return dm;
+		return mesh;
 
 	fss = fluidmd->fss;
 
@@ -552,15 +547,13 @@ DerivedMesh *fluidsimModifier_do(
 
 	/* try to read from cache */
 	/* if the frame is there, fine, otherwise don't do anything */
-	if ((result = fluidsim_read_cache(ob, dm, fluidmd, framenr, useRenderParams)))
+	if ((result = fluidsim_read_cache(ob, mesh, fluidmd, framenr, useRenderParams)))
 		return result;
 
-	return dm;
+	return mesh;
 #else
 	/* unused */
-	(void)fluidmd;
-	(void)ctx;
-	(void)dm;
+	UNUSED_VARS(fluidmd, ctx, mesh);
 	return NULL;
 #endif
 }
diff --git a/source/blender/modifiers/intern/MOD_fluidsim_util.h b/source/blender/modifiers/intern/MOD_fluidsim_util.h
index 0a0c8419a99..041a67eddbd 100644
--- a/source/blender/modifiers/intern/MOD_fluidsim_util.h
+++ b/source/blender/modifiers/intern/MOD_fluidsim_util.h
@@ -36,16 +36,16 @@
 struct Object;
 struct Scene;
 struct FluidsimModifierData;
-struct DerivedMesh;
+struct Mesh;
 struct ModifierEvalContext;
 
 /* new fluid-modifier interface */
 void fluidsim_init(struct FluidsimModifierData *fluidmd);
 void fluidsim_free(struct FluidsimModifierData *fluidmd);
 
-struct DerivedMesh *fluidsimModifier_do(
+struct Mesh *fluidsimModifier_do(
         struct FluidsimModifierData *fluidmd,
         const struct ModifierEvalContext *ctx,
-        struct DerivedMesh *dm);
+        struct Mesh *dm);
 
 #endif
diff --git a/source/blender/modifiers/intern/MOD_hook.c b/source/blender/modifiers/intern/MOD_hook.c
index a5013bb38c6..a1629d8c1f2 100644
--- a/source/blender/modifiers/intern/MOD_hook.c
+++ b/source/blender/modifiers/intern/MOD_hook.c
@@ -63,12 +63,12 @@ static void initData(ModifierData *md)
 	hmd->flag = 0;
 }
 
-static void copyData(const ModifierData *md, ModifierData *target)
+static void copyData(const ModifierData *md, ModifierData *target, const int flag)
 {
 	const HookModifierData *hmd = (const HookModifierData *) md;
 	HookModifierData *thmd = (HookModifierData *) target;
 
-	modifier_copyData_generic(md, target);
+	modifier_copyData_generic(md, target, flag);
 
 	thmd->curfalloff = curvemapping_copy(hmd->curfalloff);
 
@@ -96,7 +96,7 @@ static void freeData(ModifierData *md)
 	MEM_SAFE_FREE(hmd->indexar);
 }
 
-static bool isDisabled(const struct Scene *UNUSED(scene), ModifierData *md, int UNUSED(useRenderParams))
+static bool isDisabled(const struct Scene *UNUSED(scene), ModifierData *md, bool UNUSED(useRenderParams))
 {
 	HookModifierData *hmd = (HookModifierData *) md;
 
diff --git a/source/blender/modifiers/intern/MOD_laplaciandeform.c b/source/blender/modifiers/intern/MOD_laplaciandeform.c
index e5b96c633f7..2406739e6df 100644
--- a/source/blender/modifiers/intern/MOD_laplaciandeform.c
+++ b/source/blender/modifiers/intern/MOD_laplaciandeform.c
@@ -704,18 +704,18 @@ static void initData(ModifierData *md)
 	lmd->flag = 0;
 }
 
-static void copyData(const ModifierData *md, ModifierData *target)
+static void copyData(const ModifierData *md, ModifierData *target, const int flag)
 {
 	const LaplacianDeformModifierData *lmd = (const LaplacianDeformModifierData *)md;
 	LaplacianDeformModifierData *tlmd = (LaplacianDeformModifierData *)target;
 
-	modifier_copyData_generic(md, target);
+	modifier_copyData_generic(md, target, flag);
 
 	tlmd->vertexco = MEM_dupallocN(lmd->vertexco);
 	tlmd->cache_system = NULL;
 }
 
-static bool isDisabled(const struct Scene *UNUSED(scene), ModifierData *md, int UNUSED(useRenderParams))
+static bool isDisabled(const struct Scene *UNUSED(scene), ModifierData *md, bool UNUSED(useRenderParams))
 {
 	LaplacianDeformModifierData *lmd = (LaplacianDeformModifierData *)md;
 	if (lmd->anchor_grp_name[0]) return 0;
diff --git a/source/blender/modifiers/intern/MOD_laplaciansmooth.c b/source/blender/modifiers/intern/MOD_laplaciansmooth.c
index 580de4b1572..19838a2b637 100644
--- a/source/blender/modifiers/intern/MOD_laplaciansmooth.c
+++ b/source/blender/modifiers/intern/MOD_laplaciansmooth.c
@@ -81,7 +81,7 @@ struct BLaplacianSystem {
 typedef struct BLaplacianSystem LaplacianSystem;
 
 static CustomDataMask required_data_mask(Object *ob, ModifierData *md);
-static bool is_disabled(const struct Scene *UNUSED(scene), ModifierData *md, int useRenderParams);
+static bool is_disabled(const struct Scene *UNUSED(scene), ModifierData *md, bool useRenderParams);
 static float compute_volume(const float center[3], float (*vertexCos)[3], const MPoly *mpoly, int numPolys, const MLoop *mloop);
 static LaplacianSystem *init_laplacian_system(int a_numEdges, int a_numPolys, int a_numLoops, int a_numVerts);
 static void delete_laplacian_system(LaplacianSystem *sys);
@@ -474,7 +474,7 @@ static void init_data(ModifierData *md)
 	smd->defgrp_name[0] = '\0';
 }
 
-static bool is_disabled(const struct Scene *UNUSED(scene), ModifierData *md, int UNUSED(useRenderParams))
+static bool is_disabled(const struct Scene *UNUSED(scene), ModifierData *md, bool UNUSED(useRenderParams))
 {
 	LaplacianSmoothModifierData *smd = (LaplacianSmoothModifierData *) md;
 	short flag;
diff --git a/source/blender/modifiers/intern/MOD_lattice.c b/source/blender/modifiers/intern/MOD_lattice.c
index 540876ac339..3acd39bf19d 100644
--- a/source/blender/modifiers/intern/MOD_lattice.c
+++ b/source/blender/modifiers/intern/MOD_lattice.c
@@ -67,7 +67,7 @@ static CustomDataMask requiredDataMask(Object *UNUSED(ob), ModifierData *md)
 	return dataMask;
 }
 
-static bool isDisabled(const struct Scene *UNUSED(scene), ModifierData *md, int UNUSED(userRenderParams))
+static bool isDisabled(const struct Scene *UNUSED(scene), ModifierData *md, bool UNUSED(userRenderParams))
 {
 	LatticeModifierData *lmd = (LatticeModifierData *) md;
 
diff --git a/source/blender/modifiers/intern/MOD_meshcache.c b/source/blender/modifiers/intern/MOD_meshcache.c
index 9d6dfc0e1eb..8d2ac001e2d 100644
--- a/source/blender/modifiers/intern/MOD_meshcache.c
+++ b/source/blender/modifiers/intern/MOD_meshcache.c
@@ -72,7 +72,7 @@ static bool dependsOnTime(ModifierData *md)
 	return (mcmd->play_mode == MOD_MESHCACHE_PLAY_CFEA);
 }
 
-static bool isDisabled(const struct Scene *UNUSED(scene), ModifierData *md, int UNUSED(useRenderParams))
+static bool isDisabled(const struct Scene *UNUSED(scene), ModifierData *md, bool UNUSED(useRenderParams))
 {
 	MeshCacheModifierData *mcmd = (MeshCacheModifierData *) md;
 
diff --git a/source/blender/modifiers/intern/MOD_meshdeform.c b/source/blender/modifiers/intern/MOD_meshdeform.c
index af37b30b7aa..9bfbbc4e44e 100644
--- a/source/blender/modifiers/intern/MOD_meshdeform.c
+++ b/source/blender/modifiers/intern/MOD_meshdeform.c
@@ -81,12 +81,12 @@ static void freeData(ModifierData *md)
 	if (mmd->bindcos) MEM_freeN(mmd->bindcos);  /* deprecated */
 }
 
-static void copyData(const ModifierData *md, ModifierData *target)
+static void copyData(const ModifierData *md, ModifierData *target, const int flag)
 {
 	const MeshDeformModifierData *mmd = (const MeshDeformModifierData *) md;
 	MeshDeformModifierData *tmmd = (MeshDeformModifierData *) target;
 
-	modifier_copyData_generic(md, target);
+	modifier_copyData_generic(md, target, flag);
 
 	if (mmd->bindinfluences) tmmd->bindinfluences = MEM_dupallocN(mmd->bindinfluences);
 	if (mmd->bindoffsets) tmmd->bindoffsets = MEM_dupallocN(mmd->bindoffsets);
@@ -109,7 +109,7 @@ static CustomDataMask requiredDataMask(Object *UNUSED(ob), ModifierData *md)
 	return dataMask;
 }
 
-static bool isDisabled(const struct Scene *UNUSED(scene), ModifierData *md, int UNUSED(useRenderParams))
+static bool isDisabled(const struct Scene *UNUSED(scene), ModifierData *md, bool UNUSED(useRenderParams))
 {
 	MeshDeformModifierData *mmd = (MeshDeformModifierData *) md;
 
diff --git a/source/blender/modifiers/intern/MOD_meshsequencecache.c b/source/blender/modifiers/intern/MOD_meshsequencecache.c
index a6c9f865e4c..cef55bf467b 100644
--- a/source/blender/modifiers/intern/MOD_meshsequencecache.c
+++ b/source/blender/modifiers/intern/MOD_meshsequencecache.c
@@ -55,14 +55,14 @@ static void initData(ModifierData *md)
 	mcmd->read_flag = MOD_MESHSEQ_READ_ALL;
 }
 
-static void copyData(const ModifierData *md, ModifierData *target)
+static void copyData(const ModifierData *md, ModifierData *target, const int flag)
 {
 #if 0
 	const MeshSeqCacheModifierData *mcmd = (const MeshSeqCacheModifierData *)md;
 #endif
 	MeshSeqCacheModifierData *tmcmd = (MeshSeqCacheModifierData *)target;
 
-	modifier_copyData_generic(md, target);
+	modifier_copyData_generic(md, target, flag);
 
 	tmcmd->reader = NULL;
 }
@@ -79,7 +79,7 @@ static void freeData(ModifierData *md)
 	}
 }
 
-static bool isDisabled(const struct Scene *UNUSED(scene), ModifierData *md, int UNUSED(useRenderParams))
+static bool isDisabled(const struct Scene *UNUSED(scene), ModifierData *md, bool UNUSED(useRenderParams))
 {
 	MeshSeqCacheModifierData *mcmd = (MeshSeqCacheModifierData *) md;
 
diff --git a/source/blender/modifiers/intern/MOD_none.c b/source/blender/modifiers/intern/MOD_none.c
index c973bd18830..7a6a5b94b8e 100644
--- a/source/blender/modifiers/intern/MOD_none.c
+++ b/source/blender/modifiers/intern/MOD_none.c
@@ -43,7 +43,7 @@
  * no other functions will be called
  */
 
-static bool isDisabled(const struct Scene *UNUSED(scene), ModifierData *UNUSED(md), int UNUSED(userRenderParams))
+static bool isDisabled(const struct Scene *UNUSED(scene), ModifierData *UNUSED(md), bool UNUSED(userRenderParams))
 {
 	return true;
 }
diff --git a/source/blender/modifiers/intern/MOD_normal_edit.c b/source/blender/modifiers/intern/MOD_normal_edit.c
index ae67296dda7..14af389668c 100644
--- a/source/blender/modifiers/intern/MOD_normal_edit.c
+++ b/source/blender/modifiers/intern/MOD_normal_edit.c
@@ -524,7 +524,7 @@ static void foreachObjectLink(ModifierData *md, Object *ob, ObjectWalkFunc walk,
 	walk(userData, ob, &enmd->target, IDWALK_CB_NOP);
 }
 
-static bool isDisabled(const struct Scene *UNUSED(scene), ModifierData *md, int UNUSED(useRenderParams))
+static bool isDisabled(const struct Scene *UNUSED(scene), ModifierData *md, bool UNUSED(useRenderParams))
 {
 	NormalEditModifierData *enmd = (NormalEditModifierData *)md;
 
diff --git a/source/blender/modifiers/intern/MOD_ocean.c b/source/blender/modifiers/intern/MOD_ocean.c
index 702e557ccb1..12845b27166 100644
--- a/source/blender/modifiers/intern/MOD_ocean.c
+++ b/source/blender/modifiers/intern/MOD_ocean.c
@@ -31,6 +31,7 @@
 
 #include "DNA_customdata_types.h"
 #include "DNA_object_types.h"
+#include "DNA_mesh_types.h"
 #include "DNA_meshdata_types.h"
 #include "DNA_modifier_types.h"
 #include "DNA_scene_types.h"
@@ -40,9 +41,9 @@
 #include "BLI_task.h"
 #include "BLI_utildefines.h"
 
-#include "BKE_cdderivedmesh.h"
 #include "BKE_global.h"
 #include "BKE_main.h"
+#include "BKE_mesh.h"
 #include "BKE_modifier.h"
 #include "BKE_ocean.h"
 
@@ -60,38 +61,8 @@ static void init_cache_data(Object *ob, struct OceanModifierData *omd)
 	                                       omd->chop_amount, omd->foam_coverage, omd->foam_fade, omd->resolution);
 }
 
-static void clear_cache_data(struct OceanModifierData *omd)
-{
-	BKE_ocean_free_cache(omd->oceancache);
-	omd->oceancache = NULL;
-	omd->cached = false;
-}
-
-/* keep in sync with init_ocean_modifier_bake(), object_modifier.c */
-static void init_ocean_modifier(struct OceanModifierData *omd)
-{
-	int do_heightfield, do_chop, do_normals, do_jacobian;
-
-	if (!omd || !omd->ocean) return;
-
-	do_heightfield = true;
-	do_chop = (omd->chop_amount > 0);
-	do_normals = (omd->flag & MOD_OCEAN_GENERATE_NORMALS);
-	do_jacobian = (omd->flag & MOD_OCEAN_GENERATE_FOAM);
-
-	BKE_ocean_free_data(omd->ocean);
-	BKE_ocean_init(omd->ocean, omd->resolution * omd->resolution, omd->resolution * omd->resolution,
-	               omd->spatial_size, omd->spatial_size,
-	               omd->wind_velocity, omd->smallest_wave, 1.0, omd->wave_direction, omd->damp, omd->wave_alignment,
-	               omd->depth, omd->time,
-	               do_heightfield, do_chop, do_normals, do_jacobian,
-	               omd->seed);
-}
-
 static void simulate_ocean_modifier(struct OceanModifierData *omd)
 {
-	if (!omd || !omd->ocean) return;
-
 	BKE_ocean_simulate(omd->ocean, omd->time, omd->wave_scale, omd->chop_amount);
 }
 #endif /* WITH_OCEANSIM */
@@ -125,8 +96,6 @@ static void initData(ModifierData *md)
 	omd->seed = 0;
 	omd->time = 1.0;
 
-	omd->refresh = 0;
-
 	omd->size = 1.0;
 	omd->repeat_x = 1;
 	omd->repeat_y = 1;
@@ -141,7 +110,7 @@ static void initData(ModifierData *md)
 	omd->foamlayername[0] = '\0';   /* layer name empty by default */
 
 	omd->ocean = BKE_ocean_add();
-	init_ocean_modifier(omd);
+	BKE_ocean_init_from_modifier(omd->ocean, omd);
 	simulate_ocean_modifier(omd);
 #else  /* WITH_OCEANSIM */
 	   /* unused */
@@ -163,7 +132,7 @@ static void freeData(ModifierData *md)
 #endif /* WITH_OCEANSIM */
 }
 
-static void copyData(const ModifierData *md, ModifierData *target)
+static void copyData(const ModifierData *md, ModifierData *target, const int flag)
 {
 #ifdef WITH_OCEANSIM
 #if 0
@@ -171,21 +140,20 @@ static void copyData(const ModifierData *md, ModifierData *target)
 #endif
 	OceanModifierData *tomd = (OceanModifierData *) target;
 
-	modifier_copyData_generic(md, target);
-
-	tomd->refresh = 0;
+	modifier_copyData_generic(md, target, flag);
 
-	/* XXX todo: copy cache runtime too */
-	tomd->cached = 0;
+	/* The oceancache object will be recreated for this copy
+	 * automatically when cached=true */
 	tomd->oceancache = NULL;
 
 	tomd->ocean = BKE_ocean_add();
-	init_ocean_modifier(tomd);
+	BKE_ocean_init_from_modifier(tomd->ocean, tomd);
 	simulate_ocean_modifier(tomd);
 #else /* WITH_OCEANSIM */
 	/* unused */
 	(void)md;
 	(void)target;
+	(void)flag;
 #endif /* WITH_OCEANSIM */
 }
 
@@ -343,9 +311,9 @@ static void generate_ocean_geometry_uvs(
 	}
 }
 
-static DerivedMesh *generate_ocean_geometry(OceanModifierData *omd)
+static Mesh *generate_ocean_geometry(OceanModifierData *omd)
 {
-	DerivedMesh *result;
+	Mesh *result;
 
 	GenerateOceanGeometryData gogd;
 
@@ -370,13 +338,13 @@ static DerivedMesh *generate_ocean_geometry(OceanModifierData *omd)
 	gogd.sx /= gogd.rx;
 	gogd.sy /= gogd.ry;
 
-	result = CDDM_new(num_verts, 0, 0, num_polys * 4, num_polys);
+	result = BKE_mesh_new_nomain(num_verts, 0, 0, num_polys * 4, num_polys);
 
-	gogd.mverts = CDDM_get_verts(result);
-	gogd.mpolys = CDDM_get_polys(result);
-	gogd.mloops = CDDM_get_loops(result);
+	gogd.mverts = result->mvert;
+	gogd.mpolys = result->mpoly;
+	gogd.mloops = result->mloop;
 
-	gogd.origindex = CustomData_get_layer(&result->polyData, CD_ORIGINDEX);
+	gogd.origindex = CustomData_get_layer(&result->pdata, CD_ORIGINDEX);
 
 	ParallelRangeSettings settings;
 	BLI_parallel_range_settings_defaults(&settings);
@@ -388,11 +356,11 @@ static DerivedMesh *generate_ocean_geometry(OceanModifierData *omd)
 	/* create faces */
 	BLI_task_parallel_range(0, gogd.res_y, &gogd, generate_ocean_geometry_polygons, &settings);
 
-	CDDM_calc_edges(result);
+	BKE_mesh_calc_edges(result, false, false);
 
 	/* add uvs */
-	if (CustomData_number_of_layers(&result->loopData, CD_MLOOPUV) < MAX_MTFACE) {
-		gogd.mloopuvs = CustomData_add_layer(&result->loopData, CD_MLOOPUV, CD_CALLOC, NULL, num_polys * 4);
+	if (CustomData_number_of_layers(&result->ldata, CD_MLOOPUV) < MAX_MTFACE) {
+		gogd.mloopuvs = CustomData_add_layer(&result->ldata, CD_MLOOPUV, CD_CALLOC, NULL, num_polys * 4);
 
 		if (gogd.mloopuvs) { /* unlikely to fail */
 			gogd.ix = 1.0 / gogd.rx;
@@ -402,24 +370,24 @@ static DerivedMesh *generate_ocean_geometry(OceanModifierData *omd)
 		}
 	}
 
-	result->dirty |= DM_DIRTY_NORMALS;
+	result->runtime.cd_dirty_vert |= CD_MASK_NORMAL;
 
 	return result;
 }
 
-static DerivedMesh *doOcean(
-        ModifierData *md, Scene *scene, Object *ob,
-        DerivedMesh *derivedData,
-        int UNUSED(useRenderParams))
+static Mesh *doOcean(ModifierData *md, const ModifierEvalContext *ctx, Mesh *mesh)
 {
 	OceanModifierData *omd = (OceanModifierData *) md;
+	int cfra_scene = (int)DEG_get_ctime(ctx->depsgraph);
+	Object *ob = ctx->object;
+	bool allocated_ocean = false;
 
-	DerivedMesh *dm = NULL;
+	Mesh *result = NULL;
 	OceanResult ocr;
 
 	MVert *mverts;
 
-	int cfra;
+	int cfra_for_cache;
 	int i, j;
 
 	/* use cached & inverted value for speed
@@ -432,58 +400,57 @@ static DerivedMesh *doOcean(
 
 	/* can happen in when size is small, avoid bad array lookups later and quit now */
 	if (!isfinite(size_co_inv)) {
-		return derivedData;
+		return mesh;
 	}
 
-	/* update modifier */
-	if (omd->refresh & MOD_OCEAN_REFRESH_ADD) {
-		omd->ocean = BKE_ocean_add();
-	}
-	if (omd->refresh & MOD_OCEAN_REFRESH_RESET) {
-		init_ocean_modifier(omd);
-	}
-	if (omd->refresh & MOD_OCEAN_REFRESH_CLEAR_CACHE) {
-		clear_cache_data(omd);
-	}
-	omd->refresh = 0;
-
 	/* do ocean simulation */
 	if (omd->cached == true) {
 		if (!omd->oceancache) {
 			init_cache_data(ob, omd);
 		}
-		BKE_ocean_simulate_cache(omd->oceancache, scene->r.cfra);
+		BKE_ocean_simulate_cache(omd->oceancache, cfra_scene);
 	}
 	else {
+		/* omd->ocean is NULL on an original object (in contrast to an evaluated one).
+		 * We can create a new one, but we have to free it as well once we're done.
+		 * This function is only called on an original object when applying the modifier
+		 * using the 'Apply Modifier' button, and thus it is not called frequently for
+		 * simulation. */
+		allocated_ocean |= BKE_ocean_ensure(omd);
 		simulate_ocean_modifier(omd);
 	}
 
 	if (omd->geometry_mode == MOD_OCEAN_GEOM_GENERATE) {
-		dm = generate_ocean_geometry(omd);
-		DM_ensure_normals(dm);
+		result = generate_ocean_geometry(omd);
+		BKE_mesh_ensure_normals(result);
 	}
 	else if (omd->geometry_mode == MOD_OCEAN_GEOM_DISPLACE) {
-		dm = CDDM_copy(derivedData);
+		BKE_id_copy_ex(NULL, &mesh->id, (ID **)&result,
+		               LIB_ID_CREATE_NO_MAIN |
+		               LIB_ID_CREATE_NO_USER_REFCOUNT |
+		               LIB_ID_CREATE_NO_DEG_TAG |
+		               LIB_ID_COPY_NO_PREVIEW,
+		               false);
 	}
 
-	cfra = scene->r.cfra;
-	CLAMP(cfra, omd->bakestart, omd->bakeend);
-	cfra -= omd->bakestart; /* shift to 0 based */
+	cfra_for_cache = cfra_scene;
+	CLAMP(cfra_for_cache, omd->bakestart, omd->bakeend);
+	cfra_for_cache -= omd->bakestart; /* shift to 0 based */
 
-	mverts = dm->getVertArray(dm);
+	mverts = result->mvert;
 
 	/* add vcols before displacement - allows lookup based on position */
 
 	if (omd->flag & MOD_OCEAN_GENERATE_FOAM) {
-		if (CustomData_number_of_layers(&dm->loopData, CD_MLOOPCOL) < MAX_MCOL) {
-			const int num_polys = dm->getNumPolys(dm);
-			const int num_loops = dm->getNumLoops(dm);
-			MLoop *mloops = dm->getLoopArray(dm);
+		if (CustomData_number_of_layers(&result->ldata, CD_MLOOPCOL) < MAX_MCOL) {
+			const int num_polys = result->totpoly;
+			const int num_loops = result->totloop;
+			MLoop *mloops = result->mloop;
 			MLoopCol *mloopcols = CustomData_add_layer_named(
-			                          &dm->loopData, CD_MLOOPCOL, CD_CALLOC, NULL, num_loops, omd->foamlayername);
+			                          &result->ldata, CD_MLOOPCOL, CD_CALLOC, NULL, num_loops, omd->foamlayername);
 
 			if (mloopcols) { /* unlikely to fail */
-				MPoly *mpolys = dm->getPolyArray(dm);
+				MPoly *mpolys = result->mpoly;
 				MPoly *mp;
 
 				for (i = 0, mp = mpolys; i < num_polys; i++, mp++) {
@@ -497,7 +464,7 @@ static DerivedMesh *doOcean(
 						float foam;
 
 						if (omd->oceancache && omd->cached == true) {
-							BKE_ocean_cache_eval_uv(omd->oceancache, &ocr, cfra, u, v);
+							BKE_ocean_cache_eval_uv(omd->oceancache, &ocr, cfra_for_cache, u, v);
 							foam = ocr.foam;
 							CLAMP(foam, 0.0f, 1.0f);
 						}
@@ -520,7 +487,7 @@ static DerivedMesh *doOcean(
 
 	/* Note: tried to parallelized that one and previous foam loop, but gives 20% slower results... odd. */
 	{
-		const int num_verts = dm->getNumVerts(dm);
+		const int num_verts = result->totvert;
 
 		for (i = 0; i < num_verts; i++) {
 			float *vco = mverts[i].co;
@@ -528,7 +495,7 @@ static DerivedMesh *doOcean(
 			const float v = OCEAN_CO(size_co_inv, vco[1]);
 
 			if (omd->oceancache && omd->cached == true) {
-				BKE_ocean_cache_eval_uv(omd->oceancache, &ocr, cfra, u, v);
+				BKE_ocean_cache_eval_uv(omd->oceancache, &ocr, cfra_for_cache, u, v);
 			}
 			else {
 				BKE_ocean_eval_uv(omd->ocean, &ocr, u, v);
@@ -543,33 +510,32 @@ static DerivedMesh *doOcean(
 		}
 	}
 
+	if (allocated_ocean) {
+		BKE_ocean_free(omd->ocean);
+		omd->ocean = NULL;
+	}
+
 #undef OCEAN_CO
 
-	return dm;
+	return result;
 }
 #else  /* WITH_OCEANSIM */
-static DerivedMesh *doOcean(
-        ModifierData *UNUSED(md), Scene *UNUSED(scene), Object *UNUSED(ob),
-        DerivedMesh *derivedData,
-        int UNUSED(useRenderParams))
+static Mesh *doOcean(ModifierData *UNUSED(md), const ModifierEvalContext *UNUSED(ctx), Mesh *mesh)
 {
-	/* unused */
-	return derivedData;
+	return mesh;
 }
 #endif /* WITH_OCEANSIM */
 
-static DerivedMesh *applyModifier(
+static Mesh *applyModifier(
         ModifierData *md, const ModifierEvalContext *ctx,
-        DerivedMesh *derivedData)
+        Mesh *mesh)
 {
-	DerivedMesh *result;
-	Scene *scene = DEG_get_evaluated_scene(ctx->depsgraph);
-
+	Mesh *result;
 
-	result = doOcean(md, scene, ctx->object, derivedData, 0);
+	result = doOcean(md, ctx, mesh);
 
-	if (result != derivedData)
-		result->dirty |= DM_DIRTY_NORMALS;
+	if (result != mesh)
+		result->runtime.cd_dirty_vert |= CD_MASK_NORMAL;
 
 	return result;
 }
@@ -590,14 +556,14 @@ ModifierTypeInfo modifierType_Ocean = {
 	/* deformVerts_DM */    NULL,
 	/* deformVertsEM_DM */  NULL,
 	/* deformMatricesEM_DM*/NULL,
-	/* applyModifier_DM */  applyModifier,
+	/* applyModifier_DM */  NULL,
 	/* applyModifierEM_DM */NULL,
 
 	/* deformVerts */       NULL,
 	/* deformMatrices */    NULL,
 	/* deformVertsEM */     NULL,
 	/* deformMatricesEM */  NULL,
-	/* applyModifier */     NULL,
+	/* applyModifier */     applyModifier,
 	/* applyModifierEM */   NULL,
 
 	/* initData */          initData,
diff --git a/source/blender/modifiers/intern/MOD_particleinstance.c b/source/blender/modifiers/intern/MOD_particleinstance.c
index bb6ed8e8344..edafcd6fcb9 100644
--- a/source/blender/modifiers/intern/MOD_particleinstance.c
+++ b/source/blender/modifiers/intern/MOD_particleinstance.c
@@ -88,7 +88,7 @@ static CustomDataMask requiredDataMask(Object *UNUSED(ob), ModifierData *md)
 
 }
 
-static bool isDisabled(const struct Scene *scene, ModifierData *md, int useRenderParams)
+static bool isDisabled(const struct Scene *scene, ModifierData *md, bool useRenderParams)
 {
 	ParticleInstanceModifierData *pimd = (ParticleInstanceModifierData *)md;
 	ParticleSystem *psys;
diff --git a/source/blender/modifiers/intern/MOD_particlesystem.c b/source/blender/modifiers/intern/MOD_particlesystem.c
index 1821a0fced0..6f9a44cd9e6 100644
--- a/source/blender/modifiers/intern/MOD_particlesystem.c
+++ b/source/blender/modifiers/intern/MOD_particlesystem.c
@@ -79,14 +79,14 @@ static void freeData(ModifierData *md)
 		psmd->psys->flag |= PSYS_DELETE;
 }
 
-static void copyData(const ModifierData *md, ModifierData *target)
+static void copyData(const ModifierData *md, ModifierData *target, const int flag)
 {
 #if 0
 	const ParticleSystemModifierData *psmd = (const ParticleSystemModifierData *) md;
 #endif
 	ParticleSystemModifierData *tpsmd = (ParticleSystemModifierData *) target;
 
-	modifier_copyData_generic(md, target);
+	modifier_copyData_generic(md, target, flag);
 
 	tpsmd->mesh_final = NULL;
 	tpsmd->mesh_original = NULL;
diff --git a/source/blender/modifiers/intern/MOD_shrinkwrap.c b/source/blender/modifiers/intern/MOD_shrinkwrap.c
index 72c1c1552c7..5497673a52d 100644
--- a/source/blender/modifiers/intern/MOD_shrinkwrap.c
+++ b/source/blender/modifiers/intern/MOD_shrinkwrap.c
@@ -84,7 +84,7 @@ static CustomDataMask requiredDataMask(Object *UNUSED(ob), ModifierData *md)
 	return dataMask;
 }
 
-static bool isDisabled(const struct Scene *UNUSED(scene), ModifierData *md, int UNUSED(useRenderParams))
+static bool isDisabled(const struct Scene *UNUSED(scene), ModifierData *md, bool UNUSED(useRenderParams))
 {
 	ShrinkwrapModifierData *smd = (ShrinkwrapModifierData *) md;
 	return !smd->target;
diff --git a/source/blender/modifiers/intern/MOD_smoke.c b/source/blender/modifiers/intern/MOD_smoke.c
index e81c760ed67..9a27f31adaa 100644
--- a/source/blender/modifiers/intern/MOD_smoke.c
+++ b/source/blender/modifiers/intern/MOD_smoke.c
@@ -71,7 +71,7 @@ static void initData(ModifierData *md)
 	smd->time = -1;
 }
 
-static void copyData(const ModifierData *md, ModifierData *target)
+static void copyData(const ModifierData *md, ModifierData *target, const int UNUSED(flag))
 {
 	const SmokeModifierData *smd  = (const SmokeModifierData *)md;
 	SmokeModifierData *tsmd = (SmokeModifierData *)target;
diff --git a/source/blender/modifiers/intern/MOD_smooth.c b/source/blender/modifiers/intern/MOD_smooth.c
index 280a795fae8..29508524f9c 100644
--- a/source/blender/modifiers/intern/MOD_smooth.c
+++ b/source/blender/modifiers/intern/MOD_smooth.c
@@ -61,7 +61,7 @@ static void initData(ModifierData *md)
 	smd->defgrp_name[0] = '\0';
 }
 
-static bool isDisabled(const struct Scene *UNUSED(scene), ModifierData *md, int UNUSED(useRenderParams))
+static bool isDisabled(const struct Scene *UNUSED(scene), ModifierData *md, bool UNUSED(useRenderParams))
 {
 	SmoothModifierData *smd = (SmoothModifierData *) md;
 	short flag;
diff --git a/source/blender/modifiers/intern/MOD_subsurf.c b/source/blender/modifiers/intern/MOD_subsurf.c
index 3de04e878ac..08dc7c92693 100644
--- a/source/blender/modifiers/intern/MOD_subsurf.c
+++ b/source/blender/modifiers/intern/MOD_subsurf.c
@@ -35,8 +35,9 @@
 
 #include <stddef.h>
 
-#include "DNA_scene_types.h"
 #include "DNA_object_types.h"
+#include "DNA_scene_types.h"
+#include "DNA_mesh_types.h"
 
 #ifdef WITH_OPENSUBDIV
 #  include "DNA_userdef_types.h"
@@ -44,9 +45,9 @@
 
 #include "BLI_utildefines.h"
 
-
 #include "BKE_cdderivedmesh.h"
 #include "BKE_scene.h"
+#include "BKE_subdiv.h"
 #include "BKE_subsurf.h"
 
 #include "DEG_depsgraph.h"
@@ -56,6 +57,8 @@
 
 #include "intern/CCGSubSurf.h"
 
+// #define USE_OPENSUBDIV
+
 static void initData(ModifierData *md)
 {
 	SubsurfModifierData *smd = (SubsurfModifierData *) md;
@@ -65,14 +68,14 @@ static void initData(ModifierData *md)
 	smd->flags |= eSubsurfModifierFlag_SubsurfUv;
 }
 
-static void copyData(const ModifierData *md, ModifierData *target)
+static void copyData(const ModifierData *md, ModifierData *target, const int flag)
 {
 #if 0
 	const SubsurfModifierData *smd = (const SubsurfModifierData *) md;
 #endif
 	SubsurfModifierData *tsmd = (SubsurfModifierData *) target;
 
-	modifier_copyData_generic(md, target);
+	modifier_copyData_generic(md, target, flag);
 
 	tsmd->emCache = tsmd->mCache = NULL;
 }
@@ -91,7 +94,7 @@ static void freeData(ModifierData *md)
 	}
 }
 
-static bool isDisabled(const Scene *scene, ModifierData *md, int useRenderParams)
+static bool isDisabled(const Scene *scene, ModifierData *md, bool useRenderParams)
 {
 	SubsurfModifierData *smd = (SubsurfModifierData *) md;
 	int levels = (useRenderParams) ? smd->renderLevels : smd->levels;
@@ -181,9 +184,74 @@ static DerivedMesh *applyModifierEM(
 #endif
 
 	result = subsurf_make_derived_from_derived(derivedData, smd, scene, NULL, ss_flags);
+	return result;
+}
+
+#ifdef USE_OPENSUBDIV
+static int subdiv_levels_for_modifier_get(const SubsurfModifierData *smd,
+                                          const ModifierEvalContext *ctx)
+{
+	Scene *scene = DEG_get_evaluated_scene(ctx->depsgraph);
+	const bool use_render_params = (ctx->flag & MOD_APPLY_RENDER);
+	const int requested_levels = (use_render_params) ? smd->renderLevels
+	                                                 : smd->levels;
+	return get_render_subsurf_level(&scene->r,
+	                                requested_levels,
+	                                use_render_params);
+}
+
+static void subdiv_settings_init(SubdivSettings *settings,
+                                 const SubsurfModifierData *smd,
+                                 const ModifierEvalContext *ctx)
+{
+	settings->is_simple = (smd->subdivType == SUBSURF_TYPE_SIMPLE);
+	settings->is_adaptive = !settings->is_simple;
+	settings->level = subdiv_levels_for_modifier_get(smd, ctx);
+	settings->fvar_linear_interpolation =
+	        (smd->flags & eSubsurfModifierFlag_SubsurfUv)
+	                ? SUBDIV_FVAR_LINEAR_INTERPOLATION_CORNERS_ONLY
+	                : SUBDIV_FVAR_LINEAR_INTERPOLATION_ALL;
+}
+
+static void subdiv_mesh_settings_init(SubdivToMeshSettings *settings,
+                                      const SubdivSettings *subdiv_settings)
+{
+	settings->resolution = (1 << subdiv_settings->level) + 1;
+}
 
+static Mesh *applyModifier_subdiv(ModifierData *md,
+                                  const ModifierEvalContext *ctx,
+                                  Mesh *mesh)
+{
+	Mesh *result = mesh;
+	SubsurfModifierData *smd = (SubsurfModifierData *) md;
+	SubdivSettings subdiv_settings;
+	subdiv_settings_init(&subdiv_settings, smd, ctx);
+	if (subdiv_settings.level == 0) {
+		/* NOTE: Shouldn't really happen, is supposed to be catched by
+		 * isDisabled() callback.
+		 */
+		return result;
+	}
+	/* TODO(sergey): Try to re-use subdiv when possible. */
+	Subdiv *subdiv = BKE_subdiv_new_from_mesh(&subdiv_settings, mesh);
+	if (subdiv == NULL) {
+		/* Happens on bad topology. */
+		/* TODO(sergey): This also happens on meshes without faces, so probably
+		 * need to handle those differently (i.e. set modifier error when
+		 * topology itself is bad, and not do anything when there are no faces).
+		 */
+		return result;
+	}
+	SubdivToMeshSettings mesh_settings;
+	subdiv_mesh_settings_init(&mesh_settings, &subdiv_settings);
+	result = BKE_subdiv_to_mesh(subdiv, &mesh_settings, mesh);
+	/* TODO(sergey): Cache subdiv somehow. */
+	// BKE_subdiv_stats_print(&subdiv->stats);
+	BKE_subdiv_free(subdiv);
 	return result;
 }
+#endif
 
 static bool dependsOnNormals(ModifierData *md)
 {
@@ -222,7 +290,11 @@ ModifierTypeInfo modifierType_Subsurf = {
 	/* deformMatrices */    NULL,
 	/* deformVertsEM */     NULL,
 	/* deformMatricesEM */  NULL,
+#ifdef USE_OPENSUBDIV
+	/* applyModifier */     applyModifier_subdiv,
+#else
 	/* applyModifier */     NULL,
+#endif
 	/* applyModifierEM */   NULL,
 
 	/* initData */          initData,
diff --git a/source/blender/modifiers/intern/MOD_surfacedeform.c b/source/blender/modifiers/intern/MOD_surfacedeform.c
index a3ab2d74602..6dbeed9b4c8 100644
--- a/source/blender/modifiers/intern/MOD_surfacedeform.c
+++ b/source/blender/modifiers/intern/MOD_surfacedeform.c
@@ -136,12 +136,12 @@ static void freeData(ModifierData *md)
 	}
 }
 
-static void copyData(const ModifierData *md, ModifierData *target)
+static void copyData(const ModifierData *md, ModifierData *target, const int flag)
 {
 	const SurfaceDeformModifierData *smd = (const SurfaceDeformModifierData *)md;
 	SurfaceDeformModifierData *tsmd = (SurfaceDeformModifierData *)target;
 
-	modifier_copyData_generic(md, target);
+	modifier_copyData_generic(md, target, flag);
 
 	if (smd->verts) {
 		tsmd->verts = MEM_dupallocN(smd->verts);
@@ -1195,7 +1195,7 @@ static void deformVertsEM(
 	surfacedeformModifier_do(md, ctx, vertexCos, numVerts, ctx->object);
 }
 
-static bool isDisabled(const Scene *UNUSED(scene), ModifierData *md, int UNUSED(useRenderParams))
+static bool isDisabled(const Scene *UNUSED(scene), ModifierData *md, bool UNUSED(useRenderParams))
 {
 	SurfaceDeformModifierData *smd = (SurfaceDeformModifierData *)md;
 
diff --git a/source/blender/modifiers/intern/MOD_warp.c b/source/blender/modifiers/intern/MOD_warp.c
index 54f8ce8c515..a8f305bcc13 100644
--- a/source/blender/modifiers/intern/MOD_warp.c
+++ b/source/blender/modifiers/intern/MOD_warp.c
@@ -65,12 +65,12 @@ static void initData(ModifierData *md)
 	wmd->flag = 0;
 }
 
-static void copyData(const ModifierData *md, ModifierData *target)
+static void copyData(const ModifierData *md, ModifierData *target, const int flag)
 {
 	const WarpModifierData *wmd = (const WarpModifierData *) md;
 	WarpModifierData *twmd = (WarpModifierData *) target;
 
-	modifier_copyData_generic(md, target);
+	modifier_copyData_generic(md, target, flag);
 
 	twmd->curfalloff = curvemapping_copy(wmd->curfalloff);
 }
@@ -109,7 +109,7 @@ static void freeData(ModifierData *md)
 }
 
 
-static bool isDisabled(const struct Scene *UNUSED(scene), ModifierData *md, int UNUSED(userRenderParams))
+static bool isDisabled(const struct Scene *UNUSED(scene), ModifierData *md, bool UNUSED(userRenderParams))
 {
 	WarpModifierData *wmd = (WarpModifierData *) md;
 
diff --git a/source/blender/modifiers/intern/MOD_weightvgedit.c b/source/blender/modifiers/intern/MOD_weightvgedit.c
index a26cb73d823..a34ed1baaff 100644
--- a/source/blender/modifiers/intern/MOD_weightvgedit.c
+++ b/source/blender/modifiers/intern/MOD_weightvgedit.c
@@ -81,12 +81,12 @@ static void freeData(ModifierData *md)
 	curvemapping_free(wmd->cmap_curve);
 }
 
-static void copyData(const ModifierData *md, ModifierData *target)
+static void copyData(const ModifierData *md, ModifierData *target, const int flag)
 {
 	const WeightVGEditModifierData *wmd  = (const WeightVGEditModifierData *) md;
 	WeightVGEditModifierData *twmd = (WeightVGEditModifierData *) target;
 
-	modifier_copyData_generic(md, target);
+	modifier_copyData_generic(md, target, flag);
 
 	twmd->cmap_curve = curvemapping_copy(wmd->cmap_curve);
 }
@@ -148,7 +148,7 @@ static void updateDepsgraph(ModifierData *md, const ModifierUpdateDepsgraphConte
 	}
 }
 
-static bool isDisabled(const struct Scene *UNUSED(scene), ModifierData *md, int UNUSED(useRenderParams))
+static bool isDisabled(const struct Scene *UNUSED(scene), ModifierData *md, bool UNUSED(useRenderParams))
 {
 	WeightVGEditModifierData *wmd = (WeightVGEditModifierData *) md;
 	/* If no vertex group, bypass. */
diff --git a/source/blender/modifiers/intern/MOD_weightvgmix.c b/source/blender/modifiers/intern/MOD_weightvgmix.c
index 90bd5acff62..b6a7228b171 100644
--- a/source/blender/modifiers/intern/MOD_weightvgmix.c
+++ b/source/blender/modifiers/intern/MOD_weightvgmix.c
@@ -185,7 +185,7 @@ static void updateDepsgraph(ModifierData *md, const ModifierUpdateDepsgraphConte
 	}
 }
 
-static bool isDisabled(const struct Scene *UNUSED(scene), ModifierData *md, int UNUSED(useRenderParams))
+static bool isDisabled(const struct Scene *UNUSED(scene), ModifierData *md, bool UNUSED(useRenderParams))
 {
 	WeightVGMixModifierData *wmd = (WeightVGMixModifierData *) md;
 	/* If no vertex group, bypass. */
diff --git a/source/blender/modifiers/intern/MOD_weightvgproximity.c b/source/blender/modifiers/intern/MOD_weightvgproximity.c
index 88e33f28eaf..05b1ec19253 100644
--- a/source/blender/modifiers/intern/MOD_weightvgproximity.c
+++ b/source/blender/modifiers/intern/MOD_weightvgproximity.c
@@ -358,7 +358,7 @@ static void updateDepsgraph(ModifierData *md, const ModifierUpdateDepsgraphConte
 	}
 }
 
-static bool isDisabled(const struct Scene *UNUSED(scene), ModifierData *md, int UNUSED(useRenderParams))
+static bool isDisabled(const struct Scene *UNUSED(scene), ModifierData *md, bool UNUSED(useRenderParams))
 {
 	WeightVGProximityModifierData *wmd = (WeightVGProximityModifierData *) md;
 	/* If no vertex group, bypass. */