Sculpt: disable workbench anti-aliasing during stroke painting

This mostly happens automatically anyway since there is usually not enough
time left over for it. But when it does it happen it breaks partial redraw,
and may also have a negative impact on responsiveness.

Ref T70295

1 files changed, 10 insertions, 0 deletions

diff --git a/source/blender/editors/sculpt_paint/paint_stroke.c b/source/blender/editors/sculpt_paint/paint_stroke.c
index 137d7bd9d6c..d8be345cc84 100644
--- a/source/blender/editors/sculpt_paint/paint_stroke.c
+++ b/source/blender/editors/sculpt_paint/paint_stroke.c
@@ -862,6 +862,7 @@ PaintStroke *paint_stroke_new(bContext *C,
   UnifiedPaintSettings *ups = &toolsettings->unified_paint_settings;
   Paint *p = BKE_paint_get_active_from_context(C);
   Brush *br = stroke->brush = BKE_paint_brush(p);
+  RegionView3D *rv3d = CTX_wm_region_view3d(C);
   float zoomx, zoomy;
 
   ED_view3d_viewcontext_init(C, &stroke->vc, depsgraph);
@@ -887,6 +888,10 @@ PaintStroke *paint_stroke_new(bContext *C,
   ups->overlap_factor = 1.0;
   ups->stroke_active = true;
 
+  if (rv3d) {
+    rv3d->rflag |= RV3D_PAINTING;
+  }
+
   zero_v3(ups->average_stroke_accum);
   ups->average_stroke_counter = 0;
 
@@ -903,12 +908,17 @@ PaintStroke *paint_stroke_new(bContext *C,
 
 void paint_stroke_free(bContext *C, wmOperator *op)
 {
+  RegionView3D *rv3d = CTX_wm_region_view3d(C);
   PaintStroke *stroke = op->customdata;
   UnifiedPaintSettings *ups = stroke->ups;
 
   ups->draw_anchored = false;
   ups->stroke_active = false;
 
+  if (rv3d) {
+    rv3d->rflag &= ~RV3D_PAINTING;
+  }
+
   if (stroke->timer) {
     WM_event_remove_timer(CTX_wm_manager(C), CTX_wm_window(C), stroke->timer);
   }