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, 11 insertions, 4 deletions

diff --git a/source/blender/blenkernel/BKE_linestyle.h b/source/blender/blenkernel/BKE_linestyle.h
index c7b323d0f6e..3ba4fbe0338 100644
--- a/source/blender/blenkernel/BKE_linestyle.h
+++ b/source/blender/blenkernel/BKE_linestyle.h
@@ -52,6 +52,9 @@ struct bContext;
 void BKE_linestyle_init(struct FreestyleLineStyle *linestyle);
 FreestyleLineStyle *BKE_linestyle_new(struct Main *bmain, const char *name);
 void                BKE_linestyle_free(FreestyleLineStyle *linestyle);
+void BKE_linestyle_copy_data(
+        struct Main *bmain, struct FreestyleLineStyle *linestyle_dst, const struct FreestyleLineStyle *linestyle_src,
+        const int flag);
 FreestyleLineStyle *BKE_linestyle_copy(struct Main *bmain, const FreestyleLineStyle *linestyle);
 
 void BKE_linestyle_make_local(struct Main *bmain, struct FreestyleLineStyle *linestyle, const bool lib_local);
@@ -63,10 +66,14 @@ LineStyleModifier *BKE_linestyle_alpha_modifier_add(FreestyleLineStyle *linestyl
 LineStyleModifier *BKE_linestyle_thickness_modifier_add(FreestyleLineStyle *linestyle, const char *name, int type);
 LineStyleModifier *BKE_linestyle_geometry_modifier_add(FreestyleLineStyle *linestyle, const char *name, int type);
 
-LineStyleModifier *BKE_linestyle_color_modifier_copy(FreestyleLineStyle *linestyle, const LineStyleModifier *m);
-LineStyleModifier *BKE_linestyle_alpha_modifier_copy(FreestyleLineStyle *linestyle, const LineStyleModifier *m);
-LineStyleModifier *BKE_linestyle_thickness_modifier_copy(FreestyleLineStyle *linestyle, const LineStyleModifier *m);
-LineStyleModifier *BKE_linestyle_geometry_modifier_copy(FreestyleLineStyle *linestyle, const LineStyleModifier *m);
+LineStyleModifier *BKE_linestyle_color_modifier_copy(
+        FreestyleLineStyle *linestyle, const LineStyleModifier *m, const int flag);
+LineStyleModifier *BKE_linestyle_alpha_modifier_copy(
+        FreestyleLineStyle *linestyle, const LineStyleModifier *m, const int flag);
+LineStyleModifier *BKE_linestyle_thickness_modifier_copy(
+        FreestyleLineStyle *linestyle, const LineStyleModifier *m, const int flag);
+LineStyleModifier *BKE_linestyle_geometry_modifier_copy(
+        FreestyleLineStyle *linestyle, const LineStyleModifier *m, const int flag);
 
 int BKE_linestyle_color_modifier_remove(FreestyleLineStyle *linestyle, LineStyleModifier *modifier);
 int BKE_linestyle_alpha_modifier_remove(FreestyleLineStyle *linestyle, LineStyleModifier *modifier);