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, 5 insertions, 1 deletions

diff --git a/source/blender/blenkernel/BKE_paint.h b/source/blender/blenkernel/BKE_paint.h
index e9287465528..e73e3800af0 100644
--- a/source/blender/blenkernel/BKE_paint.h
+++ b/source/blender/blenkernel/BKE_paint.h
@@ -101,6 +101,8 @@ void BKE_paint_set_overlay_override(enum OverlayFlags flag);
 /* palettes */
 void                 BKE_palette_free(struct Palette *palette);
 struct Palette      *BKE_palette_add(struct Main *bmain, const char *name);
+void BKE_palette_copy_data(
+        struct Main *bmain, struct Palette *palette_dst, const struct Palette *palette_src, const int flag);
 struct Palette      *BKE_palette_copy(struct Main *bmain, const struct Palette *palette);
 void                 BKE_palette_make_local(struct Main *bmain, struct Palette *palette, const bool lib_local);
 struct PaletteColor *BKE_palette_color_add(struct Palette *palette);
@@ -111,12 +113,14 @@ void                 BKE_palette_clear(struct Palette *palette);
 /* paint curves */
 struct PaintCurve *BKE_paint_curve_add(struct Main *bmain, const char *name);
 void BKE_paint_curve_free(struct PaintCurve *pc);
+void BKE_paint_curve_copy_data(
+        struct Main *bmain, struct PaintCurve *pc_dst, const struct PaintCurve *pc_src, const int flag);
 struct PaintCurve *BKE_paint_curve_copy(struct Main *bmain, const struct PaintCurve *pc);
 void               BKE_paint_curve_make_local(struct Main *bmain, struct PaintCurve *pc, const bool lib_local);
 
 void BKE_paint_init(struct Scene *sce, PaintMode mode, const char col[3]);
 void BKE_paint_free(struct Paint *p);
-void BKE_paint_copy(struct Paint *src, struct Paint *tar);
+void BKE_paint_copy(struct Paint *src, struct Paint *tar, const int flag);
 
 void BKE_paint_cavity_curve_preset(struct Paint *p, int preset);