Make whole ID copying code use const source pointer.

Noisy change, but safe, and better do it sooner than later if we are to
rework copying code. Also, previous commit shows this *is* useful to
catch some mistakes.

37 files changed, 87 insertions, 85 deletions

diff --git a/source/blender/blenkernel/intern/action.c b/source/blender/blenkernel/intern/action.c
index 1e33fe4ab46..885ea36d404 100644
--- a/source/blender/blenkernel/intern/action.c
+++ b/source/blender/blenkernel/intern/action.c
@@ -120,7 +120,7 @@ void BKE_action_free(bAction *act)
 
 /* .................................. */
 
-bAction *BKE_action_copy(Main *bmain, bAction *src)
+bAction *BKE_action_copy(Main *bmain, const bAction *src)
 {
 	bAction *dst = NULL;
 	bActionGroup *dgrp, *sgrp;
@@ -523,7 +523,7 @@ const char *BKE_pose_ikparam_get_name(bPose *pose)
  *
  * \param dst  Should be freed already, makes entire duplicate.
  */
-void BKE_pose_copy_data(bPose **dst, bPose *src, const bool copy_constraints)
+void BKE_pose_copy_data(bPose **dst, const bPose *src, const bool copy_constraints)
 {
 	bPose *outPose;
 	bPoseChannel *pchan;
diff --git a/source/blender/blenkernel/intern/armature.c b/source/blender/blenkernel/intern/armature.c
index d7ea534068d..35b6fe113bd 100644
--- a/source/blender/blenkernel/intern/armature.c
+++ b/source/blender/blenkernel/intern/armature.c
@@ -150,7 +150,7 @@ void BKE_armature_make_local(Main *bmain, bArmature *arm, const bool lib_local)
 	BKE_id_make_local_generic(bmain, &arm->id, true, lib_local);
 }
 
-static void copy_bonechildren(Bone *newBone, Bone *oldBone, Bone *actBone, Bone **newActBone)
+static void copy_bonechildren(Bone *newBone, const Bone *oldBone, const Bone *actBone, Bone **newActBone)
 {
 	Bone *curBone, *newChildBone;
 
@@ -172,7 +172,7 @@ static void copy_bonechildren(Bone *newBone, Bone *oldBone, Bone *actBone, Bone
 	}
 }
 
-bArmature *BKE_armature_copy(Main *bmain, bArmature *arm)
+bArmature *BKE_armature_copy(Main *bmain, const bArmature *arm)
 {
 	bArmature *newArm;
 	Bone *oldBone, *newBone;
diff --git a/source/blender/blenkernel/intern/boids.c b/source/blender/blenkernel/intern/boids.c
index b4bc83bf94c..7ca4e07076d 100644
--- a/source/blender/blenkernel/intern/boids.c
+++ b/source/blender/blenkernel/intern/boids.c
@@ -1581,7 +1581,7 @@ void boid_free_settings(BoidSettings *boids)
 		MEM_freeN(boids);
 	}
 }
-BoidSettings *boid_copy_settings(BoidSettings *boids)
+BoidSettings *boid_copy_settings(const BoidSettings *boids)
 {
 	BoidSettings *nboids = NULL;
 
diff --git a/source/blender/blenkernel/intern/brush.c b/source/blender/blenkernel/intern/brush.c
index ea22ea3a4c4..aae323a5056 100644
--- a/source/blender/blenkernel/intern/brush.c
+++ b/source/blender/blenkernel/intern/brush.c
@@ -172,7 +172,7 @@ struct Brush *BKE_brush_first_search(struct Main *bmain, short ob_mode)
 	return NULL;
 }
 
-Brush *BKE_brush_copy(Main *bmain, Brush *brush)
+Brush *BKE_brush_copy(Main *bmain, const Brush *brush)
 {
 	Brush *brushn;
 	
diff --git a/source/blender/blenkernel/intern/cachefile.c b/source/blender/blenkernel/intern/cachefile.c
index 4ee90d4e420..17d482a5d1b 100644
--- a/source/blender/blenkernel/intern/cachefile.c
+++ b/source/blender/blenkernel/intern/cachefile.c
@@ -100,7 +100,7 @@ void BKE_cachefile_free(CacheFile *cache_file)
 	BLI_freelistN(&cache_file->object_paths);
 }
 
-CacheFile *BKE_cachefile_copy(Main *bmain, CacheFile *cache_file)
+CacheFile *BKE_cachefile_copy(Main *bmain, const CacheFile *cache_file)
 {
 	CacheFile *new_cache_file = BKE_libblock_copy(bmain, &cache_file->id);
 	new_cache_file->handle = NULL;
diff --git a/source/blender/blenkernel/intern/camera.c b/source/blender/blenkernel/intern/camera.c
index 9cb553aa27b..915c08674a4 100644
--- a/source/blender/blenkernel/intern/camera.c
+++ b/source/blender/blenkernel/intern/camera.c
@@ -93,7 +93,7 @@ void *BKE_camera_add(Main *bmain, const char *name)
 	return cam;
 }
 
-Camera *BKE_camera_copy(Main *bmain, Camera *cam)
+Camera *BKE_camera_copy(Main *bmain, const Camera *cam)
 {
 	Camera *camn;
 	
diff --git a/source/blender/blenkernel/intern/colortools.c b/source/blender/blenkernel/intern/colortools.c
index b3a0895d063..ee0f904c3a6 100644
--- a/source/blender/blenkernel/intern/colortools.c
+++ b/source/blender/blenkernel/intern/colortools.c
@@ -130,7 +130,7 @@ void curvemapping_free(CurveMapping *cumap)
 	}
 }
 
-void curvemapping_copy_data(CurveMapping *target, CurveMapping *cumap)
+void curvemapping_copy_data(CurveMapping *target, const CurveMapping *cumap)
 {
 	int a;
 
@@ -146,7 +146,7 @@ void curvemapping_copy_data(CurveMapping *target, CurveMapping *cumap)
 	}
 }
 
-CurveMapping *curvemapping_copy(CurveMapping *cumap)
+CurveMapping *curvemapping_copy(const CurveMapping *cumap)
 {
 	if (cumap) {
 		CurveMapping *cumapn = MEM_dupallocN(cumap);
diff --git a/source/blender/blenkernel/intern/curve.c b/source/blender/blenkernel/intern/curve.c
index 439abb1d593..8b32109cf2b 100644
--- a/source/blender/blenkernel/intern/curve.c
+++ b/source/blender/blenkernel/intern/curve.c
@@ -187,7 +187,7 @@ Curve *BKE_curve_add(Main *bmain, const char *name, int type)
 	return cu;
 }
 
-Curve *BKE_curve_copy(Main *bmain, Curve *cu)
+Curve *BKE_curve_copy(Main *bmain, const Curve *cu)
 {
 	Curve *cun;
 	int a;
@@ -468,7 +468,7 @@ void BKE_nurbList_free(ListBase *lb)
 	BLI_listbase_clear(lb);
 }
 
-Nurb *BKE_nurb_duplicate(Nurb *nu)
+Nurb *BKE_nurb_duplicate(const Nurb *nu)
 {
 	Nurb *newnu;
 	int len;
@@ -532,7 +532,7 @@ Nurb *BKE_nurb_copy(Nurb *src, int pntsu, int pntsv)
 	return newnu;
 }
 
-void BKE_nurbList_duplicate(ListBase *lb1, ListBase *lb2)
+void BKE_nurbList_duplicate(ListBase *lb1, const ListBase *lb2)
 {
 	Nurb *nu, *nun;
 
diff --git a/source/blender/blenkernel/intern/deform.c b/source/blender/blenkernel/intern/deform.c
index 13b1aab5e1c..69baaf5e58a 100644
--- a/source/blender/blenkernel/intern/deform.c
+++ b/source/blender/blenkernel/intern/deform.c
@@ -76,7 +76,7 @@ bDeformGroup *BKE_defgroup_new(Object *ob, const char *name)
 	return defgroup;
 }
 
-void defgroup_copy_list(ListBase *outbase, ListBase *inbase)
+void defgroup_copy_list(ListBase *outbase, const ListBase *inbase)
 {
 	bDeformGroup *defgroup, *defgroupn;
 
@@ -88,7 +88,7 @@ void defgroup_copy_list(ListBase *outbase, ListBase *inbase)
 	}
 }
 
-bDeformGroup *defgroup_duplicate(bDeformGroup *ingroup)
+bDeformGroup *defgroup_duplicate(const bDeformGroup *ingroup)
 {
 	bDeformGroup *outgroup;
 
diff --git a/source/blender/blenkernel/intern/fcurve.c b/source/blender/blenkernel/intern/fcurve.c
index 7dbc43e0a32..97d15ffc074 100644
--- a/source/blender/blenkernel/intern/fcurve.c
+++ b/source/blender/blenkernel/intern/fcurve.c
@@ -126,7 +126,7 @@ void free_fcurves(ListBase *list)
 /* ---------------------- Copy --------------------------- */
 
 /* duplicate an F-Curve */
-FCurve *copy_fcurve(FCurve *fcu)
+FCurve *copy_fcurve(const FCurve *fcu)
 {
 	FCurve *fcu_d;
 	
@@ -1805,7 +1805,7 @@ void fcurve_free_driver(FCurve *fcu)
 }
 
 /* This makes a copy of the given driver */
-ChannelDriver *fcurve_copy_driver(ChannelDriver *driver)
+ChannelDriver *fcurve_copy_driver(const ChannelDriver *driver)
 {
 	ChannelDriver *ndriver;
 	
diff --git a/source/blender/blenkernel/intern/fmodifier.c b/source/blender/blenkernel/intern/fmodifier.c
index 2c301c04100..f1732ee7a9a 100644
--- a/source/blender/blenkernel/intern/fmodifier.c
+++ b/source/blender/blenkernel/intern/fmodifier.c
@@ -116,7 +116,7 @@ static void fcm_generator_free(FModifier *fcm)
 		MEM_freeN(data->coefficients);
 }
 
-static void fcm_generator_copy(FModifier *fcm, FModifier *src)
+static void fcm_generator_copy(FModifier *fcm, const FModifier *src)
 {
 	FMod_Generator *gen = (FMod_Generator *)fcm->data;
 	FMod_Generator *ogen = (FMod_Generator *)src->data;
@@ -386,7 +386,7 @@ static void fcm_envelope_free(FModifier *fcm)
 		MEM_freeN(env->data);
 }
 
-static void fcm_envelope_copy(FModifier *fcm, FModifier *src)
+static void fcm_envelope_copy(FModifier *fcm, const FModifier *src)
 {
 	FMod_Envelope *env = (FMod_Envelope *)fcm->data;
 	FMod_Envelope *oenv = (FMod_Envelope *)src->data;
@@ -877,7 +877,7 @@ static void fcm_python_new_data(void *mdata)
 	data->prop->type = IDP_GROUP;
 }
 
-static void fcm_python_copy(FModifier *fcm, FModifier *src)
+static void fcm_python_copy(FModifier *fcm, const FModifier *src)
 {
 	FMod_Python *pymod = (FMod_Python *)fcm->data;
 	FMod_Python *opymod = (FMod_Python *)src->data;
@@ -1040,7 +1040,7 @@ static void fmods_init_typeinfo(void)
 /* This function should be used for getting the appropriate type-info when only
  * a F-Curve modifier type is known
  */
-const FModifierTypeInfo *get_fmodifier_typeinfo(int type)
+const FModifierTypeInfo *get_fmodifier_typeinfo(const int type)
 {
 	/* initialize the type-info list? */
 	if (FMI_INIT) {
@@ -1065,7 +1065,7 @@ const FModifierTypeInfo *get_fmodifier_typeinfo(int type)
 /* This function should always be used to get the appropriate type-info, as it
  * has checks which prevent segfaults in some weird cases.
  */
-const FModifierTypeInfo *fmodifier_get_typeinfo(FModifier *fcm)
+const FModifierTypeInfo *fmodifier_get_typeinfo(const FModifier *fcm)
 {
 	/* only return typeinfo for valid modifiers */
 	if (fcm)
@@ -1117,7 +1117,7 @@ FModifier *add_fmodifier(ListBase *modifiers, int type)
 }
 
 /* Make a copy of the specified F-Modifier */
-FModifier *copy_fmodifier(FModifier *src)
+FModifier *copy_fmodifier(const FModifier *src)
 {
 	const FModifierTypeInfo *fmi = fmodifier_get_typeinfo(src);
 	FModifier *dst;
@@ -1142,7 +1142,7 @@ FModifier *copy_fmodifier(FModifier *src)
 }
 
 /* Duplicate all of the F-Modifiers in the Modifier stacks */
-void copy_fmodifiers(ListBase *dst, ListBase *src)
+void copy_fmodifiers(ListBase *dst, const ListBase *src)
 {
 	FModifier *fcm, *srcfcm;
 	
diff --git a/source/blender/blenkernel/intern/gpencil.c b/source/blender/blenkernel/intern/gpencil.c
index 30fc8915d46..758438bb051 100644
--- a/source/blender/blenkernel/intern/gpencil.c
+++ b/source/blender/blenkernel/intern/gpencil.c
@@ -754,7 +754,7 @@ bGPDlayer *BKE_gpencil_layer_duplicate(const bGPDlayer *gpl_src)
 }
 
 /* make a copy of a given gpencil datablock */
-bGPdata *BKE_gpencil_data_duplicate(Main *bmain, bGPdata *gpd_src, bool internal_copy)
+bGPdata *BKE_gpencil_data_duplicate(Main *bmain, const bGPdata *gpd_src, bool internal_copy)
 {
 	const bGPDlayer *gpl_src;
 	bGPDlayer *gpl_dst;
diff --git a/source/blender/blenkernel/intern/group.c b/source/blender/blenkernel/intern/group.c
index 414802dd250..932f41ac4ba 100644
--- a/source/blender/blenkernel/intern/group.c
+++ b/source/blender/blenkernel/intern/group.c
@@ -89,7 +89,7 @@ Group *BKE_group_add(Main *bmain, const char *name)
 	return group;
 }
 
-Group *BKE_group_copy(Main *bmain, Group *group)
+Group *BKE_group_copy(Main *bmain, const Group *group)
 {
 	Group *groupn;
 
diff --git a/source/blender/blenkernel/intern/icons.c b/source/blender/blenkernel/intern/icons.c
index 7669c4ba112..bccf9307912 100644
--- a/source/blender/blenkernel/intern/icons.c
+++ b/source/blender/blenkernel/intern/icons.c
@@ -204,7 +204,7 @@ void BKE_previewimg_clear(struct PreviewImage *prv)
 	}
 }
 
-PreviewImage *BKE_previewimg_copy(PreviewImage *prv)
+PreviewImage *BKE_previewimg_copy(const PreviewImage *prv)
 {
 	PreviewImage *prv_img = NULL;
 	int i;
@@ -222,7 +222,7 @@ PreviewImage *BKE_previewimg_copy(PreviewImage *prv)
 }
 
 /** Duplicate preview image from \a id and clear icon_id, to be used by datablock copy functions. */
-void BKE_previewimg_id_copy(ID *new_id, ID *old_id)
+void BKE_previewimg_id_copy(ID *new_id, const ID *old_id)
 {
 	PreviewImage **old_prv_p = BKE_previewimg_id_get_p(old_id);
 	PreviewImage **new_prv_p = BKE_previewimg_id_get_p(new_id);
@@ -239,7 +239,7 @@ void BKE_previewimg_id_copy(ID *new_id, ID *old_id)
 	}
 }
 
-PreviewImage **BKE_previewimg_id_get_p(ID *id)
+PreviewImage **BKE_previewimg_id_get_p(const ID *id)
 {
 	switch (GS(id->name)) {
 #define ID_PRV_CASE(id_code, id_struct) case id_code: { return &((id_struct *)id)->preview; } ((void)0)
diff --git a/source/blender/blenkernel/intern/image.c b/source/blender/blenkernel/intern/image.c
index 92c796ad321..abe08def197 100644
--- a/source/blender/blenkernel/intern/image.c
+++ b/source/blender/blenkernel/intern/image.c
@@ -434,7 +434,7 @@ static void copy_image_packedfiles(ListBase *lb_dst, const ListBase *lb_src)
 }
 
 /* empty image block, of similar type and filename */
-Image *BKE_image_copy(Main *bmain, Image *ima)
+Image *BKE_image_copy(Main *bmain, const Image *ima)
 {
 	Image *nima = image_alloc(bmain, ima->id.name + 2, ima->source, ima->type);
 
diff --git a/source/blender/blenkernel/intern/key.c b/source/blender/blenkernel/intern/key.c
index 8a7c1dd2833..98b251294ae 100644
--- a/source/blender/blenkernel/intern/key.c
+++ b/source/blender/blenkernel/intern/key.c
@@ -151,7 +151,7 @@ Key *BKE_key_add(ID *id)    /* common function */
 	return key;
 }
 
-Key *BKE_key_copy(Main *bmain, Key *key)
+Key *BKE_key_copy(Main *bmain, const Key *key)
 {
 	Key *keyn;
 	KeyBlock *kbn, *kb;
diff --git a/source/blender/blenkernel/intern/lamp.c b/source/blender/blenkernel/intern/lamp.c
index 69a2067f4e6..2242ba379fb 100644
--- a/source/blender/blenkernel/intern/lamp.c
+++ b/source/blender/blenkernel/intern/lamp.c
@@ -116,7 +116,7 @@ Lamp *BKE_lamp_add(Main *bmain, const char *name)
 	return la;
 }
 
-Lamp *BKE_lamp_copy(Main *bmain, Lamp *la)
+Lamp *BKE_lamp_copy(Main *bmain, const Lamp *la)
 {
 	Lamp *lan;
 	int a;
diff --git a/source/blender/blenkernel/intern/lattice.c b/source/blender/blenkernel/intern/lattice.c
index 54cfae620a1..c9d7dddf25a 100644
--- a/source/blender/blenkernel/intern/lattice.c
+++ b/source/blender/blenkernel/intern/lattice.c
@@ -277,7 +277,7 @@ Lattice *BKE_lattice_add(Main *bmain, const char *name)
 	return lt;
 }
 
-Lattice *BKE_lattice_copy(Main *bmain, Lattice *lt)
+Lattice *BKE_lattice_copy(Main *bmain, const Lattice *lt)
 {
 	Lattice *ltn;
 
diff --git a/source/blender/blenkernel/intern/library.c b/source/blender/blenkernel/intern/library.c
index 75e606bc020..2ea7342ff34 100644
--- a/source/blender/blenkernel/intern/library.c
+++ b/source/blender/blenkernel/intern/library.c
@@ -307,7 +307,7 @@ void BKE_id_expand_local(Main *bmain, ID *id)
 /**
  * Ensure new (copied) ID is fully made local.
  */
-void BKE_id_copy_ensure_local(Main *bmain, ID *old_id, ID *new_id)
+void BKE_id_copy_ensure_local(Main *bmain, const ID *old_id, ID *new_id)
 {
 	if (ID_IS_LINKED_DATABLOCK(old_id)) {
 		BKE_id_expand_local(bmain, new_id);
@@ -488,7 +488,7 @@ bool id_make_local(Main *bmain, ID *id, const bool test, const bool lib_local)
  * Invokes the appropriate copy method for the block and returns the result in
  * newid, unless test. Returns true if the block can be copied.
  */
-bool id_copy(Main *bmain, ID *id, ID **newid, bool test)
+bool id_copy(Main *bmain, const ID *id, ID **newid, bool test)
 {
 	if (!test) {
 		*newid = NULL;
@@ -1092,7 +1092,7 @@ void BKE_libblock_copy_data(ID *id, const ID *id_from, const bool do_action)
 }
 
 /* used everywhere in blenkernel */
-void *BKE_libblock_copy(Main *bmain, ID *id)
+void *BKE_libblock_copy(Main *bmain, const ID *id)
 {
 	ID *idn;
 	size_t idn_len;
@@ -1114,7 +1114,7 @@ void *BKE_libblock_copy(Main *bmain, ID *id)
 	return idn;
 }
 
-void *BKE_libblock_copy_nolib(ID *id, const bool do_action)
+void *BKE_libblock_copy_nolib(const ID *id, const bool do_action)
 {
 	ID *idn;
 	size_t idn_len;
diff --git a/source/blender/blenkernel/intern/linestyle.c b/source/blender/blenkernel/intern/linestyle.c
index 1eb909bd9f9..771e81ddc4f 100644
--- a/source/blender/blenkernel/intern/linestyle.c
+++ b/source/blender/blenkernel/intern/linestyle.c
@@ -155,7 +155,7 @@ void BKE_linestyle_free(FreestyleLineStyle *linestyle)
 		BKE_linestyle_geometry_modifier_remove(linestyle, m);
 }
 
-FreestyleLineStyle *BKE_linestyle_copy(struct Main *bmain, FreestyleLineStyle *linestyle)
+FreestyleLineStyle *BKE_linestyle_copy(struct Main *bmain, const FreestyleLineStyle *linestyle)
 {
 	FreestyleLineStyle *new_linestyle;
 	LineStyleModifier *m;
@@ -355,7 +355,7 @@ LineStyleModifier *BKE_linestyle_color_modifier_add(FreestyleLineStyle *linestyl
 	return m;
 }
 
-LineStyleModifier *BKE_linestyle_color_modifier_copy(FreestyleLineStyle *linestyle, LineStyleModifier *m)
+LineStyleModifier *BKE_linestyle_color_modifier_copy(FreestyleLineStyle *linestyle, const LineStyleModifier *m)
 {
 	LineStyleModifier *new_m;
 
@@ -594,7 +594,7 @@ LineStyleModifier *BKE_linestyle_alpha_modifier_add(FreestyleLineStyle *linestyl
 	return m;
 }
 
-LineStyleModifier *BKE_linestyle_alpha_modifier_copy(FreestyleLineStyle *linestyle, LineStyleModifier *m)
+LineStyleModifier *BKE_linestyle_alpha_modifier_copy(FreestyleLineStyle *linestyle, const LineStyleModifier *m)
 {
 	LineStyleModifier *new_m;
 
@@ -863,7 +863,7 @@ LineStyleModifier *BKE_linestyle_thickness_modifier_add(FreestyleLineStyle *line
 	return m;
 }
 
-LineStyleModifier *BKE_linestyle_thickness_modifier_copy(FreestyleLineStyle *linestyle, LineStyleModifier *m)
+LineStyleModifier *BKE_linestyle_thickness_modifier_copy(FreestyleLineStyle *linestyle, const LineStyleModifier *m)
 {
 	LineStyleModifier *new_m;
 
@@ -1195,7 +1195,7 @@ LineStyleModifier *BKE_linestyle_geometry_modifier_add(FreestyleLineStyle *lines
 	return m;
 }
 
-LineStyleModifier *BKE_linestyle_geometry_modifier_copy(FreestyleLineStyle *linestyle, LineStyleModifier *m)
+LineStyleModifier *BKE_linestyle_geometry_modifier_copy(FreestyleLineStyle *linestyle, const LineStyleModifier *m)
 {
 	LineStyleModifier *new_m;
 
diff --git a/source/blender/blenkernel/intern/mask.c b/source/blender/blenkernel/intern/mask.c
index 1405c58cf99..ae27e9bcd34 100644
--- a/source/blender/blenkernel/intern/mask.c
+++ b/source/blender/blenkernel/intern/mask.c
@@ -192,7 +192,7 @@ void BKE_mask_layer_rename(Mask *mask, MaskLayer *masklay, char *oldname, char *
 	BKE_animdata_fix_paths_rename_all(&mask->id, "layers", oldname, masklay->name);
 }
 
-MaskLayer *BKE_mask_layer_copy(MaskLayer *masklay)
+MaskLayer *BKE_mask_layer_copy(const MaskLayer *masklay)
 {
 	MaskLayer *masklay_new;
 	MaskSpline *spline;
@@ -236,7 +236,7 @@ MaskLayer *BKE_mask_layer_copy(MaskLayer *masklay)
 	return masklay_new;
 }
 
-void BKE_mask_layer_copy_list(ListBase *masklayers_new, ListBase *masklayers)
+void BKE_mask_layer_copy_list(ListBase *masklayers_new, const ListBase *masklayers)
 {
 	MaskLayer *layer;
 
@@ -840,7 +840,7 @@ Mask *BKE_mask_copy_nolib(Mask *mask)
 	return mask_new;
 }
 
-Mask *BKE_mask_copy(Main *bmain, Mask *mask)
+Mask *BKE_mask_copy(Main *bmain, const Mask *mask)
 {
 	Mask *mask_new;
 
@@ -906,7 +906,7 @@ void BKE_mask_spline_free_list(ListBase *splines)
 	}
 }
 
-static MaskSplinePoint *mask_spline_points_copy(MaskSplinePoint *points, int tot_point)
+static MaskSplinePoint *mask_spline_points_copy(const MaskSplinePoint *points, int tot_point)
 {
 	MaskSplinePoint *npoints;
 	int i;
@@ -923,7 +923,7 @@ static MaskSplinePoint *mask_spline_points_copy(MaskSplinePoint *points, int tot
 	return npoints;
 }
 
-MaskSpline *BKE_mask_spline_copy(MaskSpline *spline)
+MaskSpline *BKE_mask_spline_copy(const MaskSpline *spline)
 {
 	MaskSpline *nspline = MEM_callocN(sizeof(MaskSpline), "new spline");
 
diff --git a/source/blender/blenkernel/intern/material.c b/source/blender/blenkernel/intern/material.c
index 54945242fe4..f21efb71180 100644
--- a/source/blender/blenkernel/intern/material.c
+++ b/source/blender/blenkernel/intern/material.c
@@ -220,7 +220,7 @@ Material *BKE_material_add(Main *bmain, const char *name)
 }
 
 /* XXX keep synced with next function */
-Material *BKE_material_copy(Main *bmain, Material *ma)
+Material *BKE_material_copy(Main *bmain, const Material *ma)
 {
 	Material *man;
 	int a;
diff --git a/source/blender/blenkernel/intern/mball.c b/source/blender/blenkernel/intern/mball.c
index 97033a9555d..b80579014d6 100644
--- a/source/blender/blenkernel/intern/mball.c
+++ b/source/blender/blenkernel/intern/mball.c
@@ -103,7 +103,7 @@ MetaBall *BKE_mball_add(Main *bmain, const char *name)
 	return mb;
 }
 
-MetaBall *BKE_mball_copy(Main *bmain, MetaBall *mb)
+MetaBall *BKE_mball_copy(Main *bmain, const MetaBall *mb)
 {
 	MetaBall *mbn;
 	int a;
diff --git a/source/blender/blenkernel/intern/mesh.c b/source/blender/blenkernel/intern/mesh.c
index c12890a354e..67b1e0b5a7d 100644
--- a/source/blender/blenkernel/intern/mesh.c
+++ b/source/blender/blenkernel/intern/mesh.c
@@ -501,7 +501,7 @@ Mesh *BKE_mesh_add(Main *bmain, const char *name)
 	return me;
 }
 
-Mesh *BKE_mesh_copy(Main *bmain, Mesh *me)
+Mesh *BKE_mesh_copy(Main *bmain, const Mesh *me)
 {
 	Mesh *men;
 	int a;
diff --git a/source/blender/blenkernel/intern/movieclip.c b/source/blender/blenkernel/intern/movieclip.c
index 6794a8e8f93..dfa8742a295 100644
--- a/source/blender/blenkernel/intern/movieclip.c
+++ b/source/blender/blenkernel/intern/movieclip.c
@@ -1488,7 +1488,7 @@ void BKE_movieclip_free(MovieClip *clip)
 	BKE_animdata_free((ID *) clip, false);
 }
 
-MovieClip *BKE_movieclip_copy(Main *bmain, MovieClip *clip)
+MovieClip *BKE_movieclip_copy(Main *bmain, const MovieClip *clip)
 {
 	MovieClip *clip_new;
 
diff --git a/source/blender/blenkernel/intern/node.c b/source/blender/blenkernel/intern/node.c
index 6e5eeda6440..dd28a534d22 100644
--- a/source/blender/blenkernel/intern/node.c
+++ b/source/blender/blenkernel/intern/node.c
@@ -921,7 +921,7 @@ static void node_socket_copy(bNodeSocket *dst, bNodeSocket *src)
 
 /* keep socket listorder identical, for copying links */
 /* ntree is the target tree */
-bNode *nodeCopyNode(struct bNodeTree *ntree, struct bNode *node)
+bNode *nodeCopyNode(bNodeTree *ntree, bNode *node)
 {
 	bNode *nnode = MEM_callocN(sizeof(bNode), "dupli node");
 	bNodeSocket *sock, *oldsock;
@@ -1200,7 +1200,9 @@ bNodeTree *ntreeAddTree(Main *bmain, const char *name, const char *idname)
  * copying for internal use (threads for eg), where you wont want it to modify the
  * scene data.
  */
-static bNodeTree *ntreeCopyTree_internal(bNodeTree *ntree, Main *bmain, bool skip_database, bool do_id_user, bool do_make_extern, bool copy_previews)
+static bNodeTree *ntreeCopyTree_internal(
+        const bNodeTree *ntree, Main *bmain,
+        bool skip_database, bool do_id_user, bool do_make_extern, bool copy_previews)
 {
 	bNodeTree *newtree;
 	bNode *node /*, *nnode */ /* UNUSED */, *last;
@@ -1299,11 +1301,11 @@ static bNodeTree *ntreeCopyTree_internal(bNodeTree *ntree, Main *bmain, bool ski
 	return newtree;
 }
 
-bNodeTree *ntreeCopyTree_ex(bNodeTree *ntree, Main *bmain, const bool do_id_user)
+bNodeTree *ntreeCopyTree_ex(const bNodeTree *ntree, Main *bmain, const bool do_id_user)
 {
 	return ntreeCopyTree_internal(ntree, bmain, false, do_id_user, true, true);
 }
-bNodeTree *ntreeCopyTree(Main *bmain, bNodeTree *ntree)
+bNodeTree *ntreeCopyTree(Main *bmain, const bNodeTree *ntree)
 {
 	return ntreeCopyTree_ex(ntree, bmain, true);
 }
diff --git a/source/blender/blenkernel/intern/object.c b/source/blender/blenkernel/intern/object.c
index b65cc408ae5..f3086396c3a 100644
--- a/source/blender/blenkernel/intern/object.c
+++ b/source/blender/blenkernel/intern/object.c
@@ -882,7 +882,7 @@ SoftBody *copy_softbody(const SoftBody *sb, bool copy_caches)
 	return sbn;
 }
 
-BulletSoftBody *copy_bulletsoftbody(BulletSoftBody *bsb)
+BulletSoftBody *copy_bulletsoftbody(const BulletSoftBody *bsb)
 {
 	BulletSoftBody *bsbn;
 
@@ -1014,7 +1014,7 @@ void BKE_object_copy_softbody(Object *ob_dst, const Object *ob_src)
 	}
 }
 
-static void copy_object_pose(Object *obn, Object *ob)
+static void copy_object_pose(Object *obn, const Object *ob)
 {
 	bPoseChannel *chan;
 	
@@ -1047,7 +1047,7 @@ static void copy_object_pose(Object *obn, Object *ob)
 	}
 }
 
-static void copy_object_lod(Object *obn, Object *ob)
+static void copy_object_lod(Object *obn, const Object *ob)
 {
 	BLI_duplicatelist(&obn->lodlevels, &ob->lodlevels);
 
@@ -1098,7 +1098,7 @@ void BKE_object_transform_copy(Object *ob_tar, const Object *ob_src)
 	copy_v3_v3(ob_tar->size, ob_src->size);
 }
 
-Object *BKE_object_copy_ex(Main *bmain, Object *ob, bool copy_caches)
+Object *BKE_object_copy_ex(Main *bmain, const Object *ob, bool copy_caches)
 {
 	Object *obn;
 	ModifierData *md;
@@ -1187,7 +1187,7 @@ Object *BKE_object_copy_ex(Main *bmain, Object *ob, bool copy_caches)
 }
 
 /* copy objects, will re-initialize cached simulation data */
-Object *BKE_object_copy(Main *bmain, Object *ob)
+Object *BKE_object_copy(Main *bmain, const Object *ob)
 {
 	return BKE_object_copy_ex(bmain, ob, false);
 }
diff --git a/source/blender/blenkernel/intern/paint.c b/source/blender/blenkernel/intern/paint.c
index 6b954f060d3..c7cfe55f659 100644
--- a/source/blender/blenkernel/intern/paint.c
+++ b/source/blender/blenkernel/intern/paint.c
@@ -314,7 +314,7 @@ PaintCurve *BKE_paint_curve_add(Main *bmain, const char *name)
 	return pc;
 }
 
-PaintCurve *BKE_paint_curve_copy(Main *bmain, PaintCurve *pc)
+PaintCurve *BKE_paint_curve_copy(Main *bmain, const PaintCurve *pc)
 {
 	PaintCurve *pc_new;
 
@@ -396,7 +396,7 @@ Palette *BKE_palette_add(Main *bmain, const char *name)
 	return palette;
 }
 
-Palette *BKE_palette_copy(Main *bmain, Palette *palette)
+Palette *BKE_palette_copy(Main *bmain, const Palette *palette)
 {
 	Palette *palette_new;
 
diff --git a/source/blender/blenkernel/intern/particle.c b/source/blender/blenkernel/intern/particle.c
index 021e9b4339d..fe7138f6774 100644
--- a/source/blender/blenkernel/intern/particle.c
+++ b/source/blender/blenkernel/intern/particle.c
@@ -3326,7 +3326,7 @@ void BKE_particlesettings_rough_curve_init(ParticleSettings *part)
 	part->roughcurve = cumap;
 }
 
-ParticleSettings *BKE_particlesettings_copy(Main *bmain, ParticleSettings *part)
+ParticleSettings *BKE_particlesettings_copy(Main *bmain, const ParticleSettings *part)
 {
 	ParticleSettings *partn;
 	int a;
diff --git a/source/blender/blenkernel/intern/property.c b/source/blender/blenkernel/intern/property.c
index dc4063b42ed..b163f623d21 100644
--- a/source/blender/blenkernel/intern/property.c
+++ b/source/blender/blenkernel/intern/property.c
@@ -65,7 +65,7 @@ void BKE_bproperty_free_list(ListBase *lb)
 	}
 }
 
-bProperty *BKE_bproperty_copy(bProperty *prop)
+bProperty *BKE_bproperty_copy(const bProperty *prop)
 {
 	bProperty *propn;
 	
@@ -80,7 +80,7 @@ bProperty *BKE_bproperty_copy(bProperty *prop)
 	return propn;
 }
 
-void BKE_bproperty_copy_list(ListBase *lbn, ListBase *lbo)
+void BKE_bproperty_copy_list(ListBase *lbn, const ListBase *lbo)
 {
 	bProperty *prop, *propn;
 	BKE_bproperty_free_list(lbn); /* in case we are copying to an object with props */
diff --git a/source/blender/blenkernel/intern/rigidbody.c b/source/blender/blenkernel/intern/rigidbody.c
index b3a36bfb089..79f37cdd6db 100644
--- a/source/blender/blenkernel/intern/rigidbody.c
+++ b/source/blender/blenkernel/intern/rigidbody.c
@@ -184,7 +184,7 @@ void BKE_rigidbody_free_constraint(Object *ob)
  * be added to relevant groups later...
  */
 
-RigidBodyOb *BKE_rigidbody_copy_object(Object *ob)
+RigidBodyOb *BKE_rigidbody_copy_object(const Object *ob)
 {
 	RigidBodyOb *rboN = NULL;
 
@@ -204,7 +204,7 @@ RigidBodyOb *BKE_rigidbody_copy_object(Object *ob)
 	return rboN;
 }
 
-RigidBodyCon *BKE_rigidbody_copy_constraint(Object *ob)
+RigidBodyCon *BKE_rigidbody_copy_constraint(const Object *ob)
 {
 	RigidBodyCon *rbcN = NULL;
 
diff --git a/source/blender/blenkernel/intern/sca.c b/source/blender/blenkernel/intern/sca.c
index 7920d8b5696..19d646daf9f 100644
--- a/source/blender/blenkernel/intern/sca.c
+++ b/source/blender/blenkernel/intern/sca.c
@@ -87,7 +87,7 @@ bSensor *copy_sensor(bSensor *sens)
 	return sensn;
 }
 
-void copy_sensors(ListBase *lbn, ListBase *lbo)
+void copy_sensors(ListBase *lbn, const ListBase *lbo)
 {
 	bSensor *sens, *sensn;
 	
@@ -251,7 +251,7 @@ bController *copy_controller(bController *cont)
 	return contn;
 }
 
-void copy_controllers(ListBase *lbn, ListBase *lbo)
+void copy_controllers(ListBase *lbn, const ListBase *lbo)
 {
 	bController *cont, *contn;
 	
@@ -389,7 +389,7 @@ bActuator *copy_actuator(bActuator *act)
 	return actn;
 }
 
-void copy_actuators(ListBase *lbn, ListBase *lbo)
+void copy_actuators(ListBase *lbn, const ListBase *lbo)
 {
 	bActuator *act, *actn;
 	
@@ -783,7 +783,7 @@ void BKE_sca_logic_links_remap(Main *bmain, Object *ob_old, Object *ob_new)
  * Handle the copying of logic data into a new object, including internal logic links update.
  * External links (links between logic bricks of different objects) must be handled separately.
  */
-void BKE_sca_logic_copy(Object *ob_new, Object *ob)
+void BKE_sca_logic_copy(Object *ob_new, const Object *ob)
 {
 	copy_sensors(&ob_new->sensors, &ob->sensors);
 	copy_controllers(&ob_new->controllers, &ob->controllers);
diff --git a/source/blender/blenkernel/intern/speaker.c b/source/blender/blenkernel/intern/speaker.c
index ee6886e3fb2..d00e4b1a0d2 100644
--- a/source/blender/blenkernel/intern/speaker.c
+++ b/source/blender/blenkernel/intern/speaker.c
@@ -68,7 +68,7 @@ void *BKE_speaker_add(Main *bmain, const char *name)
 	return spk;
 }
 
-Speaker *BKE_speaker_copy(Main *bmain, Speaker *spk)
+Speaker *BKE_speaker_copy(Main *bmain, const Speaker *spk)
 {
 	Speaker *spkn;
 
diff --git a/source/blender/blenkernel/intern/text.c b/source/blender/blenkernel/intern/text.c
index 298790a9e9b..466bef7ff36 100644
--- a/source/blender/blenkernel/intern/text.c
+++ b/source/blender/blenkernel/intern/text.c
@@ -449,7 +449,7 @@ Text *BKE_text_load(Main *bmain, const char *file, const char *relpath)
 	return BKE_text_load_ex(bmain, file, relpath, false);
 }
 
-Text *BKE_text_copy(Main *bmain, Text *ta)
+Text *BKE_text_copy(Main *bmain, const Text *ta)
 {
 	Text *tan;
 	TextLine *line, *tmp;
diff --git a/source/blender/blenkernel/intern/texture.c b/source/blender/blenkernel/intern/texture.c
index b62a72c7d9c..1e0659d3d67 100644
--- a/source/blender/blenkernel/intern/texture.c
+++ b/source/blender/blenkernel/intern/texture.c
@@ -846,7 +846,7 @@ MTex *BKE_texture_mtex_add_id(ID *id, int slot)
 
 /* ------------------------------------------------------------------------- */
 
-Tex *BKE_texture_copy(Main *bmain, Tex *tex)
+Tex *BKE_texture_copy(Main *bmain, const Tex *tex)
 {
 	Tex *texn;
 	
@@ -1263,7 +1263,7 @@ EnvMap *BKE_texture_envmap_add(void)
 
 /* ------------------------------------------------------------------------- */
 
-EnvMap *BKE_texture_envmap_copy(EnvMap *env)
+EnvMap *BKE_texture_envmap_copy(const EnvMap *env)
 {
 	EnvMap *envn;
 	int a;
@@ -1336,7 +1336,7 @@ PointDensity *BKE_texture_pointdensity_add(void)
 	return pd;
 } 
 
-PointDensity *BKE_texture_pointdensity_copy(PointDensity *pd)
+PointDensity *BKE_texture_pointdensity_copy(const PointDensity *pd)
 {
 	PointDensity *pdn;
 
@@ -1430,7 +1430,7 @@ OceanTex *BKE_texture_ocean_add(void)
 	return ot;
 }
 
-OceanTex *BKE_texture_ocean_copy(struct OceanTex *ot)
+OceanTex *BKE_texture_ocean_copy(const OceanTex *ot)
 {
 	OceanTex *otn = MEM_dupallocN(ot);
 	
diff --git a/source/blender/blenkernel/intern/tracking.c b/source/blender/blenkernel/intern/tracking.c
index bfe8dcbb21e..9120d384a16 100644
--- a/source/blender/blenkernel/intern/tracking.c
+++ b/source/blender/blenkernel/intern/tracking.c
@@ -190,7 +190,7 @@ void BKE_tracking_free(MovieTracking *tracking)
 }
 
 /* Copy the whole list of tracks. */
-static void tracking_tracks_copy(ListBase *tracks_dst, ListBase *tracks_src, GHash *tracks_mapping)
+static void tracking_tracks_copy(ListBase *tracks_dst, const ListBase *tracks_src, GHash *tracks_mapping)
 {
 	MovieTrackingTrack *track_dst, *track_src;
 
@@ -210,7 +210,7 @@ static void tracking_tracks_copy(ListBase *tracks_dst, ListBase *tracks_src, GHa
 
 /* copy the whole list of plane tracks (need whole MovieTracking structures due to embedded pointers to tracks).
  * WARNING: implies tracking_[dst/src] and their tracks have already been copied. */
-static void tracking_plane_tracks_copy(ListBase *plane_tracks_dst, ListBase *plane_tracks_src, GHash *tracks_mapping)
+static void tracking_plane_tracks_copy(ListBase *plane_tracks_dst, const ListBase *plane_tracks_src, GHash *tracks_mapping)
 {
 	MovieTrackingPlaneTrack *plane_track_dst, *plane_track_src;
 
@@ -232,7 +232,7 @@ static void tracking_plane_tracks_copy(ListBase *plane_tracks_dst, ListBase *pla
 
 /* Copy reconstruction structure. */
 static void tracking_reconstruction_copy(
-        MovieTrackingReconstruction *reconstruction_dst, MovieTrackingReconstruction *reconstruction_src)
+        MovieTrackingReconstruction *reconstruction_dst, const MovieTrackingReconstruction *reconstruction_src)
 {
 	*reconstruction_dst = *reconstruction_src;
 	if (reconstruction_src->cameras) {
@@ -242,14 +242,14 @@ static void tracking_reconstruction_copy(
 
 /* Copy stabilization structure. */
 static void tracking_stabilization_copy(
-        MovieTrackingStabilization *stabilization_dst, MovieTrackingStabilization *stabilization_src)
+        MovieTrackingStabilization *stabilization_dst, const MovieTrackingStabilization *stabilization_src)
 {
 	*stabilization_dst = *stabilization_src;
 }
 
 /* Copy tracking object. */
 static void tracking_object_copy(
-        MovieTrackingObject *object_dst, MovieTrackingObject *object_src, GHash *tracks_mapping)
+        MovieTrackingObject *object_dst, const MovieTrackingObject *object_src, GHash *tracks_mapping)
 {
 	*object_dst = *object_src;
 	tracking_tracks_copy(&object_dst->tracks, &object_src->tracks, tracks_mapping);
@@ -258,7 +258,7 @@ static void tracking_object_copy(
 }
 
 /* Copy list of tracking objects. */
-static void tracking_objects_copy(ListBase *objects_dst, ListBase *objects_src, GHash *tracks_mapping)
+static void tracking_objects_copy(ListBase *objects_dst, const ListBase *objects_src, GHash *tracks_mapping)
 {
 	MovieTrackingObject *object_dst, *object_src;
 
@@ -272,7 +272,7 @@ static void tracking_objects_copy(ListBase *objects_dst, ListBase *objects_src,
 }
 
 /* Copy tracking structure content. */
-void BKE_tracking_copy(MovieTracking *tracking_dst, MovieTracking *tracking_src)
+void BKE_tracking_copy(MovieTracking *tracking_dst, const MovieTracking *tracking_src)
 {
 	GHash *tracks_mapping = BLI_ghash_ptr_new(__func__);
 
diff --git a/source/blender/blenkernel/intern/world.c b/source/blender/blenkernel/intern/world.c
index caa9a1e357f..363c36e644d 100644
--- a/source/blender/blenkernel/intern/world.c
+++ b/source/blender/blenkernel/intern/world.c
@@ -119,7 +119,7 @@ World *add_world(Main *bmain, const char *name)
 	return wrld;
 }
 
-World *BKE_world_copy(Main *bmain, World *wrld)
+World *BKE_world_copy(Main *bmain, const World *wrld)
 {
 	World *wrldn;
 	int a;