Mask Editor: Add toggle for mask spline drawing

Adds an overlay option to show/hide the spline points & lines of masks in the Mask Editor.

It also moves the "smooth" option up (its position left of the selection dropdown was missleading).

{F11847272}

This emerged from a discussion in https://developer.blender.org/D12776

Differential Revision: https://developer.blender.org/D13314

release/scripts/startup/bl_ui/properties_mask_common.py

@@ -231,9 +231,13 @@ class MASK_PT_display:
         layout = self.layout
 
         space_data = context.space_data
+        layout.prop(space_data, "show_mask_smooth", text="Smooth")
+
         row = layout.row(align=True)
-        row.prop(space_data, "show_mask_smooth", text="Smooth")
-        row.prop(space_data, "mask_display_type", text="")
+        row.prop(space_data, "show_mask_spline", text="Spline")
+        sub = row.row()
+        sub.active = space_data.show_mask_spline
+        sub.prop(space_data, "mask_display_type", text="")
         row = layout.row(align=True)
         row.prop(space_data, "show_mask_overlay", text="Overlay")
         sub = row.row()

source/blender/blenkernel/BKE_blender_version.h

@@ -25,7 +25,7 @@ extern "C" {
 
 /* Blender file format version. */
 #define BLENDER_FILE_VERSION BLENDER_VERSION
-#define BLENDER_FILE_SUBVERSION 2
+#define BLENDER_FILE_SUBVERSION 3
 
 /* Minimum Blender version that supports reading file written with the current
  * version. Older Blender versions will test this and show a warning if the file

source/blender/blenloader/intern/versioning_300.c

@@ -30,6 +30,7 @@
 #include "DNA_gpencil_modifier_types.h"
 #include "DNA_lineart_types.h"
 #include "DNA_listBase.h"
+#include "DNA_mask_types.h"
 #include "DNA_material_types.h"
 #include "DNA_mesh_types.h"
 #include "DNA_modifier_types.h"
@@ -3096,6 +3097,21 @@ void blo_do_versions_300(FileData *fd, Library *UNUSED(lib), Main *bmain)
     }
   }
 
+  if (!MAIN_VERSION_ATLEAST(bmain, 303, 3)) {
+    LISTBASE_FOREACH (bScreen *, screen, &bmain->screens) {
+      LISTBASE_FOREACH (ScrArea *, area, &screen->areabase) {
+        LISTBASE_FOREACH (SpaceLink *, sl, &area->spacedata) {
+          if (sl->spacetype == SPACE_CLIP) {
+            ((SpaceClip *)sl)->mask_info.draw_flag |= MASK_DRAWFLAG_SPLINE;
+          }
+          else if (sl->spacetype == SPACE_IMAGE) {
+            ((SpaceImage *)sl)->mask_info.draw_flag |= MASK_DRAWFLAG_SPLINE;
+          }
+        }
+      }
+    }
+  }
+
   /**
    * Versioning code until next subversion bump goes here.
    *

source/blender/blenloader/intern/versioning_defaults.c

@@ -23,6 +23,7 @@
 #include "DNA_curveprofile_types.h"
 #include "DNA_gpencil_types.h"
 #include "DNA_light_types.h"
+#include "DNA_mask_types.h"
 #include "DNA_material_types.h"
 #include "DNA_mesh_types.h"
 #include "DNA_meshdata_types.h"
@@ -185,6 +186,7 @@ static void blo_update_defaults_screen(bScreen *screen,
       SpaceClip *sclip = area->spacedata.first;
       sclip->around = V3D_AROUND_CENTER_MEDIAN;
       sclip->mask_info.blend_factor = 0.7f;
+      sclip->mask_info.draw_flag = MASK_DRAWFLAG_SPLINE;
     }
   }
 

source/blender/editors/include/ED_clip.h

@@ -48,12 +48,27 @@ bool ED_space_clip_tracking_poll(struct bContext *C);
  * It is not required to have mask opened for editing. */
 bool ED_space_clip_maskedit_poll(struct bContext *C);
 
+/* Returns true when the following conditions are met:
+ * - Current space is Space Clip.
+ * - It is set to Mask mode.
+ * - Mask has visible and editable splines.
+ *
+ * It is not required to have mask opened for editing. */
+bool ED_space_clip_maskedit_visible_splines_poll(struct bContext *C);
+
 /* Returns true when the following conditions are met:
  * - Current space is Space Clip.
  * - It is set to Mask mode.
  * - The space has mask opened. */
 bool ED_space_clip_maskedit_mask_poll(struct bContext *C);
 
+/* Returns true when the following conditions are met:
+ * - Current space is Space Clip.
+ * - It is set to Mask mode.
+ * - The space has mask opened.
+ * - Mask has visible and editable splines. */
+bool ED_space_clip_maskedit_mask_visible_splines_poll(struct bContext *C);
+
 void ED_space_clip_get_size(struct SpaceClip *sc, int *width, int *height);
 void ED_space_clip_get_size_fl(struct SpaceClip *sc, float size[2]);
 void ED_space_clip_get_zoom(struct SpaceClip *sc,

source/blender/editors/include/ED_image.h

@@ -150,9 +150,26 @@ bool ED_space_image_maskedit_poll(struct bContext *C);
  * - Current space is Image Editor.
  * - The image editor is not a UV Editor.
  * - It is set to Mask mode.
+ * - Mask has visible and editable splines.
+ *
+ * It is not required to have mask opened for editing. */
+bool ED_space_image_maskedit_visible_splines_poll(struct bContext *C);
+
+/* Returns true when the following conditions are met:
+ * - Current space is Image Editor.
+ * - The image editor is not an UV Editor.
+ * - It is set to Mask mode.
  * - The space has mask opened. */
 bool ED_space_image_maskedit_mask_poll(struct bContext *C);
 
+/* Returns true when the following conditions are met:
+ * - Current space is Image Editor.
+ * - The image editor is not an UV Editor.
+ * - It is set to Mask mode.
+ * - The space has mask opened.
+ * - Mask has visible and editable splines. */
+bool ED_space_image_maskedit_mask_visible_splines_poll(struct bContext *C);
+
 bool ED_space_image_cursor_poll(struct bContext *C);
 
 /**

source/blender/editors/include/ED_mask.h

@@ -29,12 +29,27 @@ struct wmKeyConfig;
  * It is not required to have mask opened for editing. */
 bool ED_maskedit_poll(struct bContext *C);
 
+/* Returns true when the following conditions are met:
+ * - Current space supports mask editing.
+ * - The space is configured to interact with mask.
+ * - Mask has visible and editable splines.
+ *
+ * It is not required to have mask opened for editing. */
+bool ED_maskedit_visible_splines_poll(struct bContext *C);
+
 /* Returns true when the following conditions are met:
  * - Current space supports mask editing.
  * - The space is configured to interact with mask.
  * - The space has mask open for editing. */
 bool ED_maskedit_mask_poll(struct bContext *C);
 
+/* Returns true when the following conditions are met:
+ * - Current space supports mask editing.
+ * - The space is configured to interact with mask.
+ * - The space has mask opened.
+ * - Mask has visible and editable splines. */
+bool ED_maskedit_mask_visible_splines_poll(struct bContext *C);
+
 void ED_mask_deselect_all(const struct bContext *C);
 
 void ED_operatortypes_mask(void);

source/blender/editors/mask/mask_add.c

@@ -583,7 +583,7 @@ void MASK_OT_add_vertex(wmOperatorType *ot)
   /* api callbacks */
   ot->exec = add_vertex_exec;
   ot->invoke = add_vertex_invoke;
-  ot->poll = ED_maskedit_poll;
+  ot->poll = ED_maskedit_visible_splines_poll;
 
   /* flags */
   ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
@@ -862,7 +862,7 @@ void MASK_OT_primitive_circle_add(wmOperatorType *ot)
   /* api callbacks */
   ot->exec = primitive_circle_add_exec;
   ot->invoke = primitive_add_invoke;
-  ot->poll = ED_maskedit_poll;
+  ot->poll = ED_maskedit_visible_splines_poll;
 
   /* flags */
   ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
@@ -897,7 +897,7 @@ void MASK_OT_primitive_square_add(wmOperatorType *ot)
   /* api callbacks */
   ot->exec = primitive_square_add_exec;
   ot->invoke = primitive_add_invoke;
-  ot->poll = ED_maskedit_poll;
+  ot->poll = ED_maskedit_visible_splines_poll;
 
   /* flags */
   ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;

source/blender/editors/mask/mask_draw.c

@@ -776,7 +776,9 @@ void ED_mask_draw_region(
   }
 
   /* draw! */
-  draw_mask_layers(C, mask_eval, draw_flag, draw_type, width, height);
+  if (draw_flag & MASK_DRAWFLAG_SPLINE) {
+    draw_mask_layers(C, mask_eval, draw_flag, draw_type, width, height);
+  }
 
   if (do_draw_cb) {
     ED_region_draw_cb_draw(C, region, REGION_DRAW_POST_VIEW);

source/blender/editors/mask/mask_edit.c

@@ -42,6 +42,22 @@ bool ED_maskedit_poll(bContext *C)
   return false;
 }
 
+bool ED_maskedit_visible_splines_poll(bContext *C)
+{
+  ScrArea *area = CTX_wm_area(C);
+  if (area) {
+    switch (area->spacetype) {
+      case SPACE_CLIP:
+        return ED_space_clip_maskedit_visible_splines_poll(C);
+      case SPACE_SEQ:
+        return ED_space_sequencer_maskedit_poll(C);
+      case SPACE_IMAGE:
+        return ED_space_image_maskedit_visible_splines_poll(C);
+    }
+  }
+  return false;
+}
+
 bool ED_maskedit_mask_poll(bContext *C)
 {
   ScrArea *area = CTX_wm_area(C);
@@ -58,6 +74,22 @@ bool ED_maskedit_mask_poll(bContext *C)
   return false;
 }
 
+bool ED_maskedit_mask_visible_splines_poll(bContext *C)
+{
+  const ScrArea *area = CTX_wm_area(C);
+  if (area) {
+    switch (area->spacetype) {
+      case SPACE_CLIP:
+        return ED_space_clip_maskedit_mask_visible_splines_poll(C);
+      case SPACE_SEQ:
+        return ED_space_sequencer_maskedit_mask_poll(C);
+      case SPACE_IMAGE:
+        return ED_space_image_maskedit_mask_visible_splines_poll(C);
+    }
+  }
+  return false;
+}
+
 /** \} */
 
 /* -------------------------------------------------------------------- */

source/blender/editors/mask/mask_ops.c

@@ -907,7 +907,7 @@ void MASK_OT_slide_point(wmOperatorType *ot)
   /* api callbacks */
   ot->invoke = slide_point_invoke;
   ot->modal = slide_point_modal;
-  ot->poll = ED_maskedit_poll;
+  ot->poll = ED_maskedit_mask_visible_splines_poll;
 
   /* flags */
   ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
@@ -1297,7 +1297,7 @@ void MASK_OT_slide_spline_curvature(wmOperatorType *ot)
   /* api callbacks */
   ot->invoke = slide_spline_curvature_invoke;
   ot->modal = slide_spline_curvature_modal;
-  ot->poll = ED_maskedit_poll;
+  ot->poll = ED_maskedit_mask_visible_splines_poll;
 
   /* flags */
   ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
@@ -1336,7 +1336,7 @@ void MASK_OT_cyclic_toggle(wmOperatorType *ot)
 
   /* api callbacks */
   ot->exec = cyclic_toggle_exec;
-  ot->poll = ED_maskedit_mask_poll;
+  ot->poll = ED_maskedit_mask_visible_splines_poll;
 
   /* flags */
   ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
@@ -1493,7 +1493,7 @@ void MASK_OT_delete(wmOperatorType *ot)
   /* api callbacks */
   ot->invoke = WM_operator_confirm;
   ot->exec = delete_exec;
-  ot->poll = ED_maskedit_mask_poll;
+  ot->poll = ED_maskedit_mask_visible_splines_poll;
 
   /* flags */
   ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
@@ -1551,7 +1551,7 @@ void MASK_OT_switch_direction(wmOperatorType *ot)
 
   /* api callbacks */
   ot->exec = mask_switch_direction_exec;
-  ot->poll = ED_maskedit_mask_poll;
+  ot->poll = ED_maskedit_mask_visible_splines_poll;
 
   /* flags */
   ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
@@ -1613,7 +1613,7 @@ void MASK_OT_normals_make_consistent(wmOperatorType *ot)
 
   /* api callbacks */
   ot->exec = mask_normals_make_consistent_exec;
-  ot->poll = ED_maskedit_mask_poll;
+  ot->poll = ED_maskedit_mask_visible_splines_poll;
 
   /* flags */
   ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
@@ -1693,7 +1693,7 @@ void MASK_OT_handle_type_set(wmOperatorType *ot)
   /* api callbacks */
   ot->invoke = WM_menu_invoke;
   ot->exec = set_handle_type_exec;
-  ot->poll = ED_maskedit_mask_poll;
+  ot->poll = ED_maskedit_mask_visible_splines_poll;
 
   /* flags */
   ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
@@ -1849,7 +1849,7 @@ void MASK_OT_feather_weight_clear(wmOperatorType *ot)
 
   /* api callbacks */
   ot->exec = mask_feather_weight_clear_exec;
-  ot->poll = ED_maskedit_mask_poll;
+  ot->poll = ED_maskedit_mask_visible_splines_poll;
 
   /* flags */
   ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
@@ -2043,7 +2043,7 @@ void MASK_OT_duplicate(wmOperatorType *ot)
 
   /* api callbacks */
   ot->exec = mask_duplicate_exec;
-  ot->poll = ED_maskedit_mask_poll;
+  ot->poll = ED_maskedit_mask_visible_splines_poll;
 
   /* flags */
   ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
@@ -2084,7 +2084,7 @@ void MASK_OT_copy_splines(wmOperatorType *ot)
 
 static bool paste_splines_poll(bContext *C)
 {
-  if (ED_maskedit_mask_poll(C)) {
+  if (ED_maskedit_mask_visible_splines_poll(C)) {
     return BKE_mask_clipboard_is_empty() == false;
   }
 

source/blender/editors/mask/mask_relationships.c

@@ -62,7 +62,7 @@ void MASK_OT_parent_clear(wmOperatorType *ot)
   /* api callbacks */
   ot->exec = mask_parent_clear_exec;
 
-  ot->poll = ED_maskedit_mask_poll;
+  ot->poll = ED_maskedit_mask_visible_splines_poll;
 
   /* flags */
   ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;

source/blender/editors/mask/mask_select.c

@@ -222,7 +222,7 @@ void MASK_OT_select_all(wmOperatorType *ot)
 
   /* api callbacks */
   ot->exec = select_all_exec;
-  ot->poll = ED_maskedit_mask_poll;
+  ot->poll = ED_maskedit_mask_visible_splines_poll;
 
   /* flags */
   ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
@@ -398,7 +398,7 @@ void MASK_OT_select(wmOperatorType *ot)
   /* api callbacks */
   ot->exec = select_exec;
   ot->invoke = select_invoke;
-  ot->poll = ED_maskedit_mask_poll;
+  ot->poll = ED_maskedit_mask_visible_splines_poll;
   ot->get_name = ED_select_pick_get_name;
 
   /* flags */
@@ -504,7 +504,7 @@ void MASK_OT_select_box(wmOperatorType *ot)
   ot->invoke = WM_gesture_box_invoke;
   ot->exec = box_select_exec;
   ot->modal = WM_gesture_box_modal;
-  ot->poll = ED_maskedit_mask_poll;
+  ot->poll = ED_maskedit_mask_visible_splines_poll;
 
   /* flags */
   ot->flag = OPTYPE_UNDO;
@@ -627,7 +627,7 @@ void MASK_OT_select_lasso(wmOperatorType *ot)
   ot->invoke = WM_gesture_lasso_invoke;
   ot->modal = WM_gesture_lasso_modal;
   ot->exec = clip_lasso_select_exec;
-  ot->poll = ED_maskedit_mask_poll;
+  ot->poll = ED_maskedit_mask_visible_splines_poll;
   ot->cancel = WM_gesture_lasso_cancel;
 
   /* flags */
@@ -745,7 +745,7 @@ void MASK_OT_select_circle(wmOperatorType *ot)
   ot->invoke = WM_gesture_circle_invoke;
   ot->modal = WM_gesture_circle_modal;
   ot->exec = circle_select_exec;
-  ot->poll = ED_maskedit_mask_poll;
+  ot->poll = ED_maskedit_mask_visible_splines_poll;
   ot->get_name = ED_select_circle_get_name;
 
   /* flags */
@@ -809,7 +809,7 @@ void MASK_OT_select_linked_pick(wmOperatorType *ot)
 
   /* api callbacks */
   ot->invoke = mask_select_linked_pick_invoke;
-  ot->poll = ED_maskedit_mask_poll;
+  ot->poll = ED_maskedit_mask_visible_splines_poll;
 
   /* flags */
   ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
@@ -864,7 +864,7 @@ void MASK_OT_select_linked(wmOperatorType *ot)
 
   /* api callbacks */
   ot->exec = mask_select_linked_exec;
-  ot->poll = ED_maskedit_mask_poll;
+  ot->poll = ED_maskedit_mask_visible_splines_poll;
 
   /* flags */
   ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
@@ -963,7 +963,7 @@ void MASK_OT_select_more(wmOperatorType *ot)
 
   /* api callbacks */
   ot->exec = mask_select_more_exec;
-  ot->poll = ED_maskedit_mask_poll;
+  ot->poll = ED_maskedit_mask_visible_splines_poll;
 
   /* flags */
   ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
@@ -983,7 +983,7 @@ void MASK_OT_select_less(wmOperatorType *ot)
 
   /* api callbacks */
   ot->exec = mask_select_less_exec;
-  ot->poll = ED_maskedit_mask_poll;
+  ot->poll = ED_maskedit_mask_visible_splines_poll;
 
   /* flags */
   ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;

source/blender/editors/mask/mask_shapekey.c

@@ -67,7 +67,7 @@ void MASK_OT_shape_key_insert(wmOperatorType *ot)
 
   /* api callbacks */
   ot->exec = mask_shape_key_insert_exec;
-  ot->poll = ED_maskedit_mask_poll;
+  ot->poll = ED_maskedit_mask_visible_splines_poll;
 
   /* flags */
   ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
@@ -113,7 +113,7 @@ void MASK_OT_shape_key_clear(wmOperatorType *ot)
 
   /* api callbacks */
   ot->exec = mask_shape_key_clear_exec;
-  ot->poll = ED_maskedit_mask_poll;
+  ot->poll = ED_maskedit_mask_visible_splines_poll;
 
   /* flags */
   ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
@@ -197,7 +197,7 @@ void MASK_OT_shape_key_feather_reset(wmOperatorType *ot)
 
   /* api callbacks */
   ot->exec = mask_shape_key_feather_reset_exec;
-  ot->poll = ED_maskedit_mask_poll;
+  ot->poll = ED_maskedit_mask_visible_splines_poll;
 
   /* flags */
   ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
@@ -356,7 +356,7 @@ void MASK_OT_shape_key_rekey(wmOperatorType *ot)
 
   /* api callbacks */
   ot->exec = mask_shape_key_rekey_exec;
-  ot->poll = ED_maskedit_mask_poll;
+  ot->poll = ED_maskedit_mask_visible_splines_poll;
 
   /* flags */
   ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;

source/blender/editors/space_clip/clip_editor.c

@@ -102,6 +102,16 @@ bool ED_space_clip_maskedit_poll(bContext *C)
   return false;
 }
 
+bool ED_space_clip_maskedit_visible_splines_poll(bContext *C)
+{
+  if (!ED_space_clip_maskedit_poll(C)) {
+    return false;
+  }
+
+  const SpaceClip *space_clip = CTX_wm_space_clip(C);
+  return space_clip->mask_info.draw_flag & MASK_DRAWFLAG_SPLINE;
+}
+
 bool ED_space_clip_maskedit_mask_poll(bContext *C)
 {
   if (ED_space_clip_maskedit_poll(C)) {
@@ -117,6 +127,16 @@ bool ED_space_clip_maskedit_mask_poll(bContext *C)
   return false;
 }
 
+bool ED_space_clip_maskedit_mask_visible_splines_poll(bContext *C)
+{
+  if (!ED_space_clip_maskedit_mask_poll(C)) {
+    return false;
+  }
+
+  const SpaceClip *space_clip = CTX_wm_space_clip(C);
+  return space_clip->mask_info.draw_flag & MASK_DRAWFLAG_SPLINE;
+}
+
 /** \} */
 
 /* -------------------------------------------------------------------- */

source/blender/editors/space_image/image_edit.c

@@ -483,6 +483,16 @@ bool ED_space_image_maskedit_poll(bContext *C)
   return false;
 }
 
+bool ED_space_image_maskedit_visible_splines_poll(bContext *C)
+{
+  if (!ED_space_image_maskedit_poll(C)) {
+    return false;
+  }
+
+  const SpaceImage *space_image = CTX_wm_space_image(C);
+  return space_image->mask_info.draw_flag & MASK_DRAWFLAG_SPLINE;
+}
+
 bool ED_space_image_paint_curve(const bContext *C)
 {
   SpaceImage *sima = CTX_wm_space_image(C);
@@ -508,6 +518,16 @@ bool ED_space_image_maskedit_mask_poll(bContext *C)
   return false;
 }
 
+bool ED_space_image_maskedit_mask_visible_splines_poll(bContext *C)
+{
+  if (!ED_space_image_maskedit_mask_poll(C)) {
+    return false;
+  }
+
+  const SpaceImage *space_image = CTX_wm_space_image(C);
+  return space_image->mask_info.draw_flag & MASK_DRAWFLAG_SPLINE;
+}
+
 bool ED_space_image_cursor_poll(bContext *C)
 {
   return ED_operator_uvedit_space_image(C) || ED_space_image_maskedit_poll(C) ||

source/blender/editors/transform/transform_convert_mask.c

@@ -261,18 +261,10 @@ void createTransMaskingData(bContext *C, TransInfo *t)
 
   tc->data_len = 0;
 
-  if (!mask) {
+  if (!ED_maskedit_mask_visible_splines_poll(C)) {
     return;
   }
 
-  if (t->spacetype == SPACE_CLIP) {
-    SpaceClip *sc = t->area->spacedata.first;
-    MovieClip *clip = ED_space_clip_get_clip(sc);
-    if (!clip) {
-      return;
-    }
-  }
-
   /* count */
   for (masklay = mask->masklayers.first; masklay; masklay = masklay->next) {
     MaskSpline *spline;

source/blender/makesdna/DNA_mask_types.h

@@ -198,6 +198,7 @@ enum {
 /* SpaceClip->mask_draw_flag */
 #define MASK_DRAWFLAG_SMOOTH (1 << 0)
 #define MASK_DRAWFLAG_OVERLAY (1 << 1)
+#define MASK_DRAWFLAG_SPLINE (1 << 2)
 
 /* copy of eSpaceImage_UVDT */
 /* SpaceClip->mask_draw_type */

source/blender/makesdna/DNA_space_defaults.h

@@ -15,7 +15,7 @@
 
 #define _DNA_DEFAULT_MaskSpaceInfo \
   { \
-    .draw_flag = 0, \
+    .draw_flag = MASK_DRAWFLAG_SPLINE, \
     .draw_type = MASK_DT_OUTLINE, \
     .overlay_mode = MASK_OVERLAY_ALPHACHANNEL, \
     .blend_factor = 0.7f, \

source/blender/makesrna/intern/rna_space.c

@@ -3483,6 +3483,11 @@ static void rna_def_space_mask_info(StructRNA *srna, int noteflag, const char *m
   RNA_def_property_ui_text(prop, "Display Smooth Splines", "");
   RNA_def_property_update(prop, noteflag, NULL);
 
+  prop = RNA_def_property(srna, "show_mask_spline", PROP_BOOLEAN, PROP_NONE);
+  RNA_def_property_boolean_sdna(prop, NULL, "mask_info.draw_flag", MASK_DRAWFLAG_SPLINE);
+  RNA_def_property_ui_text(prop, "Show Mask Spline", "");
+  RNA_def_property_update(prop, noteflag, NULL);
+
   prop = RNA_def_property(srna, "show_mask_overlay", PROP_BOOLEAN, PROP_NONE);
   RNA_def_property_boolean_sdna(prop, NULL, "mask_info.draw_flag", MASK_DRAWFLAG_OVERLAY);
   RNA_def_property_ui_text(prop, "Show Mask Overlay", "");