LineArt: Filtering feature lines with face mask

User can specify filtering options inside line art modifier,
like inverting selection and including face mark region border.

Reviewed By: Sebastian Parborg (zeddb)

Differential Revision: https://developer.blender.org/D11307

1 files changed, 47 insertions, 0 deletions

diff --git a/source/blender/gpencil_modifiers/intern/MOD_gpencillineart.c b/source/blender/gpencil_modifiers/intern/MOD_gpencillineart.c
index 1f70ecb4595..b87ed9e431a 100644
--- a/source/blender/gpencil_modifiers/intern/MOD_gpencillineart.c
+++ b/source/blender/gpencil_modifiers/intern/MOD_gpencillineart.c
@@ -449,6 +449,51 @@ static void transparency_panel_draw(const bContext *UNUSED(C), Panel *panel)
   uiItemR(col, ptr, "use_transparency_match", 0, IFACE_("Match All Masks"), ICON_NONE);
 }
 
+static void face_mark_panel_draw_header(const bContext *UNUSED(C), Panel *panel)
+{
+  uiLayout *layout = panel->layout;
+  PointerRNA ob_ptr;
+  PointerRNA *ptr = gpencil_modifier_panel_get_property_pointers(panel, &ob_ptr);
+
+  const bool is_baked = RNA_boolean_get(ptr, "is_baked");
+  const bool use_cache = RNA_boolean_get(ptr, "use_cache");
+  const bool is_first = BKE_gpencil_is_first_lineart_in_stack(ob_ptr.data, ptr->data);
+
+  if (!use_cache || is_first) {
+    uiLayoutSetEnabled(layout, !is_baked);
+    uiItemR(layout, ptr, "use_face_mark", 0, IFACE_("Face Mark Filtering"), ICON_NONE);
+  }
+  else {
+    uiItemL(layout, IFACE_("Face Mark Filtering"), ICON_NONE);
+  }
+}
+
+static void face_mark_panel_draw(const bContext *UNUSED(C), Panel *panel)
+{
+  uiLayout *layout = panel->layout;
+  PointerRNA ob_ptr;
+  PointerRNA *ptr = gpencil_modifier_panel_get_property_pointers(panel, &ob_ptr);
+
+  const bool is_baked = RNA_boolean_get(ptr, "is_baked");
+  const bool use_mark = RNA_boolean_get(ptr, "use_face_mark");
+  const bool use_cache = RNA_boolean_get(ptr, "use_cache");
+  const bool is_first = BKE_gpencil_is_first_lineart_in_stack(ob_ptr.data, ptr->data);
+
+  uiLayoutSetEnabled(layout, !is_baked);
+
+  if (use_cache && !is_first) {
+    uiItemL(layout, "Cached from the first line art modifier.", ICON_INFO);
+    return;
+  }
+
+  uiLayoutSetPropSep(layout, true);
+
+  uiLayoutSetActive(layout, use_mark);
+
+  uiItemR(layout, ptr, "use_face_mark_invert", 0, NULL, ICON_NONE);
+  uiItemR(layout, ptr, "use_face_mark_boundaries", 0, NULL, ICON_NONE);
+}
+
 static void chaining_panel_draw(const bContext *UNUSED(C), Panel *panel)
 {
   PointerRNA ob_ptr;
@@ -567,6 +612,8 @@ static void panelRegister(ARegionType *region_type)
                                      transparency_panel_draw,
                                      occlusion_panel);
   gpencil_modifier_subpanel_register(
+      region_type, "face_mark", "", face_mark_panel_draw_header, face_mark_panel_draw, panel_type);
+  gpencil_modifier_subpanel_register(
       region_type, "chaining", "Chaining", NULL, chaining_panel_draw, panel_type);
   gpencil_modifier_subpanel_register(
       region_type, "vgroup", "Vertex Weight Transfer", NULL, vgroup_panel_draw, panel_type);