Added rendering of smart fill and contour around selected areas for the FDM supports painting gizmo.

src/slic3r/GUI/Gizmos/GLGizmoPainterBase.cpp

@@ -569,6 +569,29 @@ void TriangleSelectorGUI::render(ImGuiWrapper* imgui)
         }
     }
 
+    for (auto &iva : m_iva_seed_fills)
+        if (iva.has_VBOs()) {
+            size_t                      color_idx = &iva - &m_iva_seed_fills.front();
+            const std::array<float, 4> &color     = TriangleSelectorGUI::get_seed_fill_color(color_idx == 1 ? enforcers_color :
+                                                                                             color_idx == 2 ? blockers_color :
+                                                                                                              GLVolume::NEUTRAL_COLOR);
+            shader->set_uniform("uniform_color", color);
+            iva.render();
+        }
+
+    if (m_paint_contour.has_VBO()) {
+        ScopeGuard guard_gouraud([shader]() { shader->start_using(); });
+        shader->stop_using();
+
+        auto *contour_shader = wxGetApp().get_shader("mm_contour");
+        contour_shader->start_using();
+
+        glsafe(::glDepthFunc(GL_GEQUAL));
+        m_paint_contour.render();
+        glsafe(::glDepthFunc(GL_LESS));
+
+        contour_shader->stop_using();
+    }
 
 #ifdef PRUSASLICER_TRIANGLE_SELECTOR_DEBUG
     if (imgui)
@@ -580,22 +603,31 @@ void TriangleSelectorGUI::render(ImGuiWrapper* imgui)
 
 void TriangleSelectorGUI::update_render_data()
 {
-    int enf_cnt = 0;
-    int blc_cnt = 0;
+    int              enf_cnt = 0;
+    int              blc_cnt = 0;
+    std::vector<int> seed_fill_cnt(m_iva_seed_fills.size(), 0);
 
     for (auto *iva : {&m_iva_enforcers, &m_iva_blockers})
         iva->release_geometry();
 
+    for (auto &iva : m_iva_seed_fills)
+        iva.release_geometry();
+
     for (const Triangle &tr : m_triangles) {
-        if (!tr.valid() || tr.is_split() || tr.get_state() == EnforcerBlockerType::NONE)
+        if (!tr.valid() || tr.is_split() || (tr.get_state() == EnforcerBlockerType::NONE && !tr.is_selected_by_seed_fill()))
             continue;
 
-        GLIndexedVertexArray &iva = tr.get_state() == EnforcerBlockerType::ENFORCER ? m_iva_enforcers : m_iva_blockers;
-        int &                 cnt = tr.get_state() == EnforcerBlockerType::ENFORCER ? enf_cnt : blc_cnt;
+        int tr_state = int(tr.get_state());
+        GLIndexedVertexArray &iva = tr.is_selected_by_seed_fill()                   ? m_iva_seed_fills[tr_state] :
+                                    tr.get_state() == EnforcerBlockerType::ENFORCER ? m_iva_enforcers :
+                                                                                      m_iva_blockers;
+        int                  &cnt = tr.is_selected_by_seed_fill()                   ? seed_fill_cnt[tr_state] :
+                                    tr.get_state() == EnforcerBlockerType::ENFORCER ? enf_cnt :
+                                                                                      blc_cnt;
         const Vec3f          &v0  = m_vertices[tr.verts_idxs[0]].v;
         const Vec3f          &v1  = m_vertices[tr.verts_idxs[1]].v;
         const Vec3f          &v2  = m_vertices[tr.verts_idxs[2]].v;
-        //FIXME the normal may likely be pulled from m_triangle_selectors, but it may not be worth the effort 
+        //FIXME the normal may likely be pulled from m_triangle_selectors, but it may not be worth the effort
         // or the current implementation may be more cache friendly.
         const Vec3f           n   = (v1 - v0).cross(v2 - v1).normalized();
         iva.push_geometry(v0, n);
@@ -607,6 +639,28 @@ void TriangleSelectorGUI::update_render_data()
 
     for (auto *iva : {&m_iva_enforcers, &m_iva_blockers})
         iva->finalize_geometry(true);
+
+    for (auto &iva : m_iva_seed_fills)
+        iva.finalize_geometry(true);
+
+    m_paint_contour.release_geometry();
+    std::vector<Vec2i> contour_edges = this->get_seed_fill_contour();
+    m_paint_contour.contour_vertices.reserve(contour_edges.size() * 6);
+    for (const Vec2i &edge : contour_edges) {
+        m_paint_contour.contour_vertices.emplace_back(m_vertices[edge(0)].v.x());
+        m_paint_contour.contour_vertices.emplace_back(m_vertices[edge(0)].v.y());
+        m_paint_contour.contour_vertices.emplace_back(m_vertices[edge(0)].v.z());
+
+        m_paint_contour.contour_vertices.emplace_back(m_vertices[edge(1)].v.x());
+        m_paint_contour.contour_vertices.emplace_back(m_vertices[edge(1)].v.y());
+        m_paint_contour.contour_vertices.emplace_back(m_vertices[edge(1)].v.z());
+    }
+
+    m_paint_contour.contour_indices.assign(m_paint_contour.contour_vertices.size() / 3, 0);
+    std::iota(m_paint_contour.contour_indices.begin(), m_paint_contour.contour_indices.end(), 0);
+    m_paint_contour.contour_indices_size = m_paint_contour.contour_indices.size();
+
+    m_paint_contour.finalize_geometry();
 }
 
 void GLPaintContour::render() const

src/slic3r/GUI/Gizmos/GLGizmoPainterBase.hpp

@@ -92,6 +92,7 @@ private:
 
     GLIndexedVertexArray                m_iva_enforcers;
     GLIndexedVertexArray                m_iva_blockers;
+    std::array<GLIndexedVertexArray, 3> m_iva_seed_fills;
     std::array<GLIndexedVertexArray, 3> m_varrays;
 
 protected:

src/slic3r/GUI/Gizmos/GLGizmosManager.cpp

@@ -548,7 +548,7 @@ bool GLGizmosManager::on_mouse(wxMouseEvent& evt)
     // mouse anywhere
     if (evt.Moving()) {
         m_tooltip = update_hover_state(mouse_pos);
-        if (m_current == MmuSegmentation)
+        if (m_current == MmuSegmentation || m_current == FdmSupports)
             gizmo_event(SLAGizmoEventType::Moving, mouse_pos, evt.ShiftDown(), evt.AltDown());
     } else if (evt.LeftUp()) {
         if (m_mouse_capture.left) {