GP: Count all strokes when use multiedit for VBO size

When use multi frame edition, the initial size of the VBO must be bigger than normal edition because the realloc of VBO is very slow.

1 files changed, 4 insertions, 3 deletions

diff --git a/source/blender/draw/engines/gpencil/gpencil_draw_utils.c b/source/blender/draw/engines/gpencil/gpencil_draw_utils.c
index fa16a00183e..8bcd1e13fe1 100644
--- a/source/blender/draw/engines/gpencil/gpencil_draw_utils.c
+++ b/source/blender/draw/engines/gpencil/gpencil_draw_utils.c
@@ -79,6 +79,7 @@ static void gpencil_calc_vertex(
 		main_onion && DRW_gpencil_onion_active(gpd) && !playing;
 
 	const bool time_remap = BKE_gpencil_has_time_modifiers(ob);
+	const bool is_multiedit = (bool)GPENCIL_MULTIEDIT_SESSIONS_ON(gpd);
 
 	cache_ob->tot_vertex = 0;
 	cache_ob->tot_triangles = 0;
@@ -90,9 +91,9 @@ static void gpencil_calc_vertex(
 			continue;
 		}
 
-		/* if onion skin need to count all frames of the layer */
-		if (is_onion) {
-			init_gpf = gpl->actframe;
+		/* if multiedit or onion skin need to count all frames of the layer */
+		if ((is_multiedit) || (is_onion)) {
+			init_gpf = gpl->frames.first;
 		}
 		else {
 			/* verify time modifiers */