Refactor ID copying (and to some extent, ID freeing).

This will allow much finer controll over how we copy data-blocks, from
full copy in Main database, to "lighter" ones (out of Main, inside an
already allocated datablock, etc.).

This commit also transfers a llot of what was previously handled by
per-ID-type custom code to generic ID handling code in BKE_library.
Hopefully will avoid in future inconsistencies and missing bits we had
all over the codebase in the past.

It also adds missing copying handling for a few types, most notably
Scene (which where using a fully customized handling previously).

Note that the type of allocation used during copying (regular in Main,
allocated but outside of Main, or not allocated by ID handling code at
all) is stored in ID's, which allows to handle them correctly when
freeing. This needs to be taken care of with caution when doing 'weird'
unusual things with ID copying and/or allocation!

As a final note, while rather noisy, this commit will hopefully not
break too much existing branches, old 'API' has been kept for the main
part, as a wrapper around new code. Cleaning it up will happen later.

Design task : T51804
Phab Diff: D2714

1 files changed, 4 insertions, 3 deletions

diff --git a/source/blender/blenkernel/BKE_texture.h b/source/blender/blenkernel/BKE_texture.h
index 190fdeafaec..8a9171673ea 100644
--- a/source/blender/blenkernel/BKE_texture.h
+++ b/source/blender/blenkernel/BKE_texture.h
@@ -70,6 +70,7 @@ void colorband_update_sort(struct ColorBand *coba);
 
 void         BKE_texture_free(struct Tex *tex);
 void         BKE_texture_default(struct Tex *tex);
+void         BKE_texture_copy_data(struct Main *bmain, struct Tex *tex_dst, const struct Tex *tex_src, const int flag);
 struct Tex  *BKE_texture_copy(struct Main *bmain, const struct Tex *tex);
 struct Tex  *BKE_texture_add(struct Main *bmain, const char *name);
 struct Tex  *BKE_texture_localize(struct Tex *tex);
@@ -114,13 +115,13 @@ void                 BKE_texture_colormapping_default(struct ColorMapping *color
 void           BKE_texture_envmap_free_data(struct EnvMap *env);
 void           BKE_texture_envmap_free(struct EnvMap *env);
 struct EnvMap *BKE_texture_envmap_add(void);
-struct EnvMap *BKE_texture_envmap_copy(const struct EnvMap *env);
+struct EnvMap *BKE_texture_envmap_copy(const struct EnvMap *env, const int flag);
 
 void                 BKE_texture_pointdensity_init_data(struct PointDensity *pd);
 void                 BKE_texture_pointdensity_free_data(struct PointDensity *pd);
 void                 BKE_texture_pointdensity_free(struct PointDensity *pd);
 struct PointDensity *BKE_texture_pointdensity_add(void);
-struct PointDensity *BKE_texture_pointdensity_copy(const struct PointDensity *pd);
+struct PointDensity *BKE_texture_pointdensity_copy(const struct PointDensity *pd, const int flag);
 
 void              BKE_texture_voxeldata_free_data(struct VoxelData *vd);
 void              BKE_texture_voxeldata_free(struct VoxelData *vd);
@@ -129,7 +130,7 @@ struct VoxelData *BKE_texture_voxeldata_copy(struct VoxelData *vd);
 
 void             BKE_texture_ocean_free(struct OceanTex *ot);
 struct OceanTex *BKE_texture_ocean_add(void);
-struct OceanTex *BKE_texture_ocean_copy(const struct OceanTex *ot);
+struct OceanTex *BKE_texture_ocean_copy(const struct OceanTex *ot, const int flag);
 
 bool    BKE_texture_dependsOnTime(const struct Tex *texture);
 bool    BKE_texture_is_image_user(const struct Tex *tex);