GPv3: Overlay: only show visible and editable materials.

@@ -272,3 +275,1 @@
-    total_line_ids_num += curves.points_num();
-    /* Add one id for the last segment of every cyclic curve. */
-    total_line_ids_num += array_utils::count_booleans(curves.cyclic());
+    editable_strokes.foreach_index(GrainSize(512), [&](const int curve_i) {

@@ -282,3 +293,3 @@
         ".selection", ATTR_DOMAIN_POINT, true);
 
-    for (const int curve_i : curves.curves_range()) {
+    editable_strokes.foreach_index(GrainSize(512), [&](const int curve_i) {

@@ -314,3 +327,1 @@
-      for (const int curve_i : range) {
-        const IndexRange points = points_by_curve[curve_i];
-        const bool is_cyclic = cyclic[curve_i];
+    editable_strokes.foreach_index(GrainSize(512), [&](const int curve_i) {

@@ -339,3 +348,1 @@
-          if (!ed::curves::has_anything_selected(selection, points)) {
-            continue;
-          }
+      editable_strokes.foreach_index(GrainSize(512), [&](const int curve_i) {

@@ -408,1 +422,4 @@
+    int pos = 0;
     for (const int curve_i : curves.curves_range()) {
+      IndexRange points = points_by_curve[curve_i];
+      if (visible_strokes.contains(curve_i)) {

@@ -409,0 +434,4 @@
+    /* Calculate the vertex offsets for all the visible curves. */
+    int num_cyclic = 0;
+    int num_points = 0;
+    visible_strokes.foreach_index(GrainSize(512), [&](const int curve_i, const int pos) {

@@ -520,3 +539,1 @@
-        IndexRange verts_range = IndexRange(verts_start_offset, num_verts);
-        MutableSpan<GreasePencilStrokeVert> verts_slice = verts.slice(verts_range);
-        MutableSpan<GreasePencilColorVert> cols_slice = cols.slice(verts_range);
+    visible_strokes.foreach_index(GrainSize(512), [&](const int curve_i, const int pos) {

@@ -180,0 +187,4 @@
+    return *static_cast<const bool *>(info.data) ? mask.size() : 0;
+  }
+  int64_t value = 0;
+  mask.foreach_index([&](const int64_t init) {

@@ -180,0 +189,4 @@
+  int64_t value = 0;
+  mask.foreach_index([&](const int64_t init) {
+    const bool is_cyclic = varray[init];
+    value += (is_cyclic ? 1 : 0);

@@ -324,3 +330,1 @@
-        }
-
-        GPU_indexbuf_add_primitive_restart(&elb);
+      for (const int point : points) {

@@ -170,0 +176,4 @@
+    if (material != nullptr && material->gp_style != nullptr &&
+        (material->gp_style->flag & GP_MATERIAL_HIDE) != 0)
+    {
+      hidden_material_indices.add(mat_i);

@@ -229,0 +248,4 @@
+  using namespace blender;
+
+  /* Get all the hidden material indices. */
+  VectorSet<int> hidden_material_indices = get_hidden_material_indices(object);

@@ -180,0 +186,4 @@
+  if (info.type == CommonVArrayInfo::Type::Single) {
+    return *static_cast<const bool *>(info.data) ? mask.size() : 0;
+  }
+  int64_t value = 0;

@@ -229,0 +256,4 @@
+
+  /* Get all the strokes that have their material visible. */
+  const VArray<int> materials = *attributes.lookup_or_default<int>(
+      "material_index", ATTR_DOMAIN_CURVE, -1);

@@ -183,0 +205,4 @@
+    if (locked_material_indices.contains(0)) {
+      return curves_range;
+    }
+    else {

@@ -207,0 +239,4 @@
+    if (locked_material_indices.contains(0)) {
+      return points_range;
+    }
+    else {