Commit: ab144437e26ae098207cbdaf55b72a07cc52c636
Author: Antonioya
Date:   Wed Dec 19 22:56:29 2018 +0100
Branches: blender2.8
https://developer.blender.org/rBab144437e26ae098207cbdaf55b72a07cc52c636

Fix T59579: Grease Pencil copy buffer loses material information

===================================================================

M       source/blender/editors/gpencil/gpencil_edit.c

===================================================================

diff --git a/source/blender/editors/gpencil/gpencil_edit.c 
b/source/blender/editors/gpencil/gpencil_edit.c
index 916a268dc57..5cfc35d122a 100644
--- a/source/blender/editors/gpencil/gpencil_edit.c
+++ b/source/blender/editors/gpencil/gpencil_edit.c
@@ -871,7 +871,9 @@ GHash *gp_copybuf_validate_colormap(bContext *C)
                }
 
                /* Store this mapping (for use later when pasting) */
-               BLI_ghash_insert(new_colors, key, ma);
+               if (!BLI_ghash_haskey(new_colors, POINTER_FROM_INT(*key))) {
+                       BLI_ghash_insert(new_colors, POINTER_FROM_INT(*key), 
ma);
+               }
        }
 
        gp_strokes_copypastebuf_colors_name_to_material_free(name_to_ma);
@@ -1118,13 +1120,13 @@ static int gp_strokes_paste_exec(bContext *C, 
wmOperator *op)
                                BLI_addtail(&gpf->strokes, new_stroke);
 
                                /* Remap material */
-                               Material *ma = BLI_ghash_lookup(new_colors, 
&new_stroke->mat_nr);
+                               Material *ma = BLI_ghash_lookup(new_colors, 
POINTER_FROM_INT(new_stroke->mat_nr));
                                if ((ma) && (BKE_gpencil_get_material_index(ob, 
ma) > 0)) {
-                                       gps->mat_nr = 
BKE_gpencil_get_material_index(ob, ma) - 1;
-                                       CLAMP_MIN(gps->mat_nr, 0);
+                                       new_stroke->mat_nr = 
BKE_gpencil_get_material_index(ob, ma) - 1;
+                                       CLAMP_MIN(new_stroke->mat_nr, 0);
                                }
                                else {
-                                       gps->mat_nr = 0; /* only if the color 
is not found */
+                                       new_stroke->mat_nr = 0; /* only if the 
color is not found */
                                }
 
                        }

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