[Bf-blender-cvs] [43abc5dabfb] blender2.8: GP: Use original datablock and not evaluated version

[Antonioya]

Commit: 43abc5dabfb0ecc0a481e1f0597245fd5ff44af4
Author: Antonioya
Date:   Tue Sep 11 10:29:33 2018 +0200
Branches: blender2.8
https://developer.blender.org/rB43abc5dabfb0ecc0a481e1f0597245fd5ff44af4

GP: Use original datablock and not evaluated version

This is required to avoid COW delay while drawing.

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

M	source/blender/draw/engines/gpencil/gpencil_engine.c

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

diff --git a/source/blender/draw/engines/gpencil/gpencil_engine.c b/source/blender/draw/engines/gpencil/gpencil_engine.c
index 5dd1cb50405..aa033dd36e0 100644
--- a/source/blender/draw/engines/gpencil/gpencil_engine.c
+++ b/source/blender/draw/engines/gpencil/gpencil_engine.c
@@ -42,6 +42,8 @@
 
 #include "gpencil_engine.h"
 
+#include "DEG_depsgraph_query.h"
+
 #include "ED_screen.h"
 #include "ED_gpencil.h"
 
@@ -381,9 +383,11 @@ void GPENCIL_cache_init(void *vedata)
 		    (obact_gpd->flag & GP_DATA_STROKE_PAINTMODE) &&
 		    (stl->storage->is_playing == false))
 		{
-			if (((obact_gpd->runtime.sbuffer_sflag & GP_STROKE_ERASER) == 0) &&
-			    (obact_gpd->runtime.sbuffer_size > 0) &&
-			    ((obact_gpd->flag & GP_DATA_STROKE_POLYGON) == 0))
+			/* need the original to avoid cow overhead while drawing */
+			bGPdata *gpd_orig = (bGPdata *)DEG_get_original_id(&obact_gpd->id);
+			if (((gpd_orig->runtime.sbuffer_sflag & GP_STROKE_ERASER) == 0) &&
+			    (gpd_orig->runtime.sbuffer_size > 0) &&
+			    ((gpd_orig->flag & GP_DATA_STROKE_POLYGON) == 0))
 			{
 				stl->g_data->session_flag |= GP_DRW_PAINT_PAINTING;
 			}