GLCanvas3DManager moved from being a static member of _3DScene to be a normal member of GUI_App

src/PrusaSlicer.cpp

@@ -527,8 +527,10 @@ int CLI::run(int argc, char **argv)
                 gui->mainframe->load_config(m_extra_config);
         });
         int result = wxEntry(argc, argv);
+#if !ENABLE_NON_STATIC_CANVAS_MANAGER
         //FIXME this is a workaround for the PrusaSlicer 2.1 release.
 		_3DScene::destroy();
+#endif // !ENABLE_NON_STATIC_CANVAS_MANAGER
         return result;
 #else /* SLIC3R_GUI */
         // No GUI support. Just print out a help.

src/libslic3r/Technologies.hpp

@@ -43,9 +43,12 @@
 
 
 //==================
-// 2.2.0.beta1 techs
+// 2.2.0.final techs
 //==================
-#define ENABLE_2_2_0_BETA1 1
+#define ENABLE_2_2_0_FINAL 1
+
+// Moves GLCanvas3DManager from being a static member of _3DScene to be a normal member of GUI_App
+#define ENABLE_NON_STATIC_CANVAS_MANAGER (1 && ENABLE_2_2_0_FINAL)
 
 
 #endif // _technologies_h_

src/slic3r/GUI/3DBed.cpp

@@ -10,6 +10,9 @@
 #include "PresetBundle.hpp"
 #include "Gizmos/GLGizmoBase.hpp"
 #include "GLCanvas3D.hpp"
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+#include "GLCanvas3DManager.hpp"
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 
 #include <GL/glew.h>
 

src/slic3r/GUI/3DScene.cpp

@@ -1822,7 +1822,9 @@ void _3DScene::point3_to_verts(const Vec3crd& point, double width, double height
     thick_point_to_verts(point, width, height, volume);
 }
 
+#if !ENABLE_NON_STATIC_CANVAS_MANAGER
 GUI::GLCanvas3DManager _3DScene::s_canvas_mgr;
+#endif // !ENABLE_NON_STATIC_CANVAS_MANAGER
 
 GLModel::GLModel()
     : m_filename("")
@@ -2105,6 +2107,7 @@ bool GLBed::on_init_from_file(const std::string& filename)
     return true;
 }
 
+#if !ENABLE_NON_STATIC_CANVAS_MANAGER
 std::string _3DScene::get_gl_info(bool format_as_html, bool extensions)
 {
     return Slic3r::GUI::GLCanvas3DManager::get_gl_info().to_string(format_as_html, extensions);
@@ -2139,5 +2142,6 @@ GUI::GLCanvas3D* _3DScene::get_canvas(wxGLCanvas* canvas)
 {
     return s_canvas_mgr.get_canvas(canvas);
 }
+#endif // !ENABLE_NON_STATIC_CANVAS_MANAGER
 
 } // namespace Slic3r

src/slic3r/GUI/3DScene.hpp

@@ -7,7 +7,9 @@
 #include "libslic3r/TriangleMesh.hpp"
 #include "libslic3r/Utils.hpp"
 #include "libslic3r/Model.hpp"
+#if !ENABLE_NON_STATIC_CANVAS_MANAGER
 #include "slic3r/GUI/GLCanvas3DManager.hpp"
+#endif // !ENABLE_NON_STATIC_CANVAS_MANAGER
 
 #include <functional>
 #include <memory>
@@ -645,10 +647,17 @@ protected:
     bool on_init_from_file(const std::string& filename) override;
 };
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+struct _3DScene
+#else
 class _3DScene
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 {
+#if !ENABLE_NON_STATIC_CANVAS_MANAGER
     static GUI::GLCanvas3DManager s_canvas_mgr;
+#endif // !ENABLE_NON_STATIC_CANVAS_MANAGER
 
+#if !ENABLE_NON_STATIC_CANVAS_MANAGER
 public:
     static std::string get_gl_info(bool format_as_html, bool extensions);
 
@@ -660,6 +669,7 @@ public:
     static void destroy();
 
     static GUI::GLCanvas3D* get_canvas(wxGLCanvas* canvas);
+#endif // !ENABLE_NON_STATIC_CANVAS_MANAGER
 
     static void thick_lines_to_verts(const Lines& lines, const std::vector<double>& widths, const std::vector<double>& heights, bool closed, double top_z, GLVolume& volume);
     static void thick_lines_to_verts(const Lines3& lines, const std::vector<double>& widths, const std::vector<double>& heights, bool closed, GLVolume& volume);

src/slic3r/GUI/GLCanvas3D.cpp

@@ -22,6 +22,10 @@
 #include "slic3r/GUI/PresetBundle.hpp"
 #include "slic3r/GUI/Tab.hpp"
 #include "slic3r/GUI/GUI_Preview.hpp"
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+#include "slic3r/GUI/GLCanvas3DManager.hpp"
+#include "slic3r/GUI/Camera.hpp"
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 
 #include "GUI_App.hpp"
 #include "GUI_ObjectList.hpp"
@@ -357,7 +361,11 @@ Rect GLCanvas3D::LayersEditing::get_bar_rect_viewport(const GLCanvas3D& canvas)
     float half_w = 0.5f * (float)cnv_size.get_width();
     float half_h = 0.5f * (float)cnv_size.get_height();
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    float inv_zoom = (float)wxGetApp().plater()->get_camera().get_inv_zoom();
+#else
     float inv_zoom = (float)canvas.get_camera().get_inv_zoom();
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 
     return Rect((half_w - thickness_bar_width(canvas)) * inv_zoom, half_h * inv_zoom, half_w * inv_zoom, -half_h * inv_zoom);
 }
@@ -849,7 +857,11 @@ void GLCanvas3D::WarningTexture::render(const GLCanvas3D& canvas) const
     if ((m_id > 0) && (m_original_width > 0) && (m_original_height > 0) && (m_width > 0) && (m_height > 0))
     {
         const Size& cnv_size = canvas.get_canvas_size();
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+        float inv_zoom = (float)wxGetApp().plater()->get_camera().get_inv_zoom();
+#else
         float inv_zoom = (float)canvas.get_camera().get_inv_zoom();
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
         float left = (-0.5f * (float)m_original_width) * inv_zoom;
         float top = (-0.5f * (float)cnv_size.get_height() + (float)m_original_height + 2.0f) * inv_zoom;
         float right = left + (float)m_original_width * inv_zoom;
@@ -1216,7 +1228,11 @@ void GLCanvas3D::LegendTexture::render(const GLCanvas3D& canvas) const
     if ((m_id > 0) && (m_original_width > 0) && (m_original_height > 0) && (m_width > 0) && (m_height > 0))
     {
         const Size& cnv_size = canvas.get_canvas_size();
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+        float inv_zoom = (float)wxGetApp().plater()->get_camera().get_inv_zoom();
+#else
         float inv_zoom = (float)canvas.get_camera().get_inv_zoom();
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
         float left = (-0.5f * (float)cnv_size.get_width()) * inv_zoom;
         float top = (0.5f * (float)cnv_size.get_height()) * inv_zoom;
         float right = left + (float)m_original_width * inv_zoom;
@@ -1242,7 +1258,11 @@ void GLCanvas3D::Labels::render(const std::vector<const ModelInstance*>& sorted_
     if (!m_enabled || !is_shown())
         return;
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    const Camera& camera = wxGetApp().plater()->get_camera();
+#else
     const Camera& camera = m_canvas.get_camera();
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
     const Model* model = m_canvas.get_model();
     if (model == nullptr)
         return;
@@ -1403,16 +1423,22 @@ wxDEFINE_EVENT(EVT_GLCANVAS_RELOAD_FROM_DISK, SimpleEvent);
 const double GLCanvas3D::DefaultCameraZoomToBoxMarginFactor = 1.25;
 #endif // ENABLE_THUMBNAIL_GENERATOR
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+GLCanvas3D::GLCanvas3D(wxGLCanvas* canvas)
+#else
 GLCanvas3D::GLCanvas3D(wxGLCanvas* canvas, Bed3D& bed, Camera& camera, GLToolbar& view_toolbar)
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
     : m_canvas(canvas)
     , m_context(nullptr)
 #if ENABLE_RETINA_GL
     , m_retina_helper(nullptr)
 #endif
     , m_in_render(false)
+#if !ENABLE_NON_STATIC_CANVAS_MANAGER
     , m_bed(bed)
     , m_camera(camera)
     , m_view_toolbar(view_toolbar)
+#endif // !ENABLE_NON_STATIC_CANVAS_MANAGER
     , m_main_toolbar(GLToolbar::Normal, "Top")
     , m_undoredo_toolbar(GLToolbar::Normal, "Top")
     , m_gizmos(*this)
@@ -1560,6 +1586,18 @@ void GLCanvas3D::reset_volumes()
     if (!m_initialized)
         return;
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    if (m_volumes.empty())
+        return;
+
+    _set_current();
+
+    m_selection.clear();
+    m_volumes.clear();
+    m_dirty = true;
+
+    _set_warning_texture(WarningTexture::ObjectOutside, false);
+#else
     _set_current();
 
     if (!m_volumes.empty())
@@ -1570,6 +1608,7 @@ void GLCanvas3D::reset_volumes()
     }
 
     _set_warning_texture(WarningTexture::ObjectOutside, false);
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 }
 
 int GLCanvas3D::check_volumes_outside_state() const
@@ -1651,7 +1690,11 @@ void GLCanvas3D::set_model(Model* model)
 void GLCanvas3D::bed_shape_changed()
 {
     refresh_camera_scene_box();
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    wxGetApp().plater()->get_camera().requires_zoom_to_bed = true;
+#else
     m_camera.requires_zoom_to_bed = true;
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
     m_dirty = true;
 }
 
@@ -1660,6 +1703,13 @@ void GLCanvas3D::set_color_by(const std::string& value)
     m_color_by = value;
 }
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+void GLCanvas3D::refresh_camera_scene_box()
+{
+    wxGetApp().plater()->get_camera().set_scene_box(scene_bounding_box());
+}
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
+
 BoundingBoxf3 GLCanvas3D::volumes_bounding_box() const
 {
     BoundingBoxf3 bb;
@@ -1674,7 +1724,11 @@ BoundingBoxf3 GLCanvas3D::volumes_bounding_box() const
 BoundingBoxf3 GLCanvas3D::scene_bounding_box() const
 {
     BoundingBoxf3 bb = volumes_bounding_box();
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    bb.merge(wxGetApp().plater()->get_bed().get_bounding_box(true));
+#else
     bb.merge(m_bed.get_bounding_box(true));
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 
     if (m_config != nullptr)
     {
@@ -1787,7 +1841,11 @@ void GLCanvas3D::allow_multisample(bool allow)
 
 void GLCanvas3D::zoom_to_bed()
 {
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    _zoom_to_box(wxGetApp().plater()->get_bed().get_bounding_box(false));
+#else
     _zoom_to_box(m_bed.get_bounding_box(false));
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 }
 
 void GLCanvas3D::zoom_to_volumes()
@@ -1805,7 +1863,11 @@ void GLCanvas3D::zoom_to_selection()
 
 void GLCanvas3D::select_view(const std::string& direction)
 {
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    wxGetApp().plater()->get_camera().select_view(direction);
+#else
     m_camera.select_view(direction);
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
     if (m_canvas != nullptr)
         m_canvas->Refresh();
 }
@@ -1833,14 +1895,26 @@ void GLCanvas3D::render()
         return;
 
     // ensures this canvas is current and initialized
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    if (!_is_shown_on_screen() || !_set_current() || !wxGetApp().init_opengl())
+        return;
+
+    if (!is_initialized() && !init())
+        return;
+#else
     if (! _is_shown_on_screen() || !_set_current() || !_3DScene::init(m_canvas))
         return;
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 
 #if ENABLE_RENDER_STATISTICS
     auto start_time = std::chrono::high_resolution_clock::now();
 #endif // ENABLE_RENDER_STATISTICS
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    if (wxGetApp().plater()->get_bed().get_shape().empty())
+#else
     if (m_bed.get_shape().empty())
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
     {
         // this happens at startup when no data is still saved under <>\AppData\Roaming\Slic3rPE
         post_event(SimpleEvent(EVT_GLCANVAS_UPDATE_BED_SHAPE));
@@ -1852,6 +1926,20 @@ void GLCanvas3D::render()
     // to preview, this was called before canvas had its final size. It reported zero width
     // and the viewport was set incorrectly, leading to tripping glAsserts further down
     // the road (in apply_projection). That's why the minimum size is forced to 10.
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    Camera& camera = wxGetApp().plater()->get_camera();
+    camera.apply_viewport(0, 0, std::max(10u, (unsigned int)cnv_size.get_width()), std::max(10u, (unsigned int)cnv_size.get_height()));
+
+    if (camera.requires_zoom_to_bed)
+    {
+        zoom_to_bed();
+        _resize((unsigned int)cnv_size.get_width(), (unsigned int)cnv_size.get_height());
+        camera.requires_zoom_to_bed = false;
+    }
+
+    camera.apply_view_matrix();
+    camera.apply_projection(_max_bounding_box(true, true));
+#else
     m_camera.apply_viewport(0, 0, std::max(10u, (unsigned int)cnv_size.get_width()), std::max(10u, (unsigned int)cnv_size.get_height()));
 
     if (m_camera.requires_zoom_to_bed)
@@ -1863,6 +1951,7 @@ void GLCanvas3D::render()
 
     m_camera.apply_view_matrix();
     m_camera.apply_projection(_max_bounding_box(true, true));
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 
     GLfloat position_cam[4] = { 1.0f, 0.0f, 1.0f, 0.0f };
     glsafe(::glLightfv(GL_LIGHT1, GL_POSITION, position_cam));
@@ -1892,7 +1981,11 @@ void GLCanvas3D::render()
     _render_objects();
     _render_sla_slices();
     _render_selection();
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    _render_bed(!camera.is_looking_downward(), true);
+#else
     _render_bed(!m_camera.is_looking_downward(), true);
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 
 #if ENABLE_RENDER_SELECTION_CENTER
     _render_selection_center();
@@ -1958,8 +2051,13 @@ void GLCanvas3D::render_thumbnail(ThumbnailData& thumbnail_data, unsigned int w,
 {
     switch (GLCanvas3DManager::get_framebuffers_type())
     {
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    case GLCanvas3DManager::EFramebufferType::Arb: { _render_thumbnail_framebuffer(thumbnail_data, w, h, printable_only, parts_only, show_bed, transparent_background); break; }
+    case GLCanvas3DManager::EFramebufferType::Ext: { _render_thumbnail_framebuffer_ext(thumbnail_data, w, h, printable_only, parts_only, show_bed, transparent_background); break; }
+#else
     case GLCanvas3DManager::FB_Arb: { _render_thumbnail_framebuffer(thumbnail_data, w, h, printable_only, parts_only, show_bed, transparent_background); break; }
     case GLCanvas3DManager::FB_Ext: { _render_thumbnail_framebuffer_ext(thumbnail_data, w, h, printable_only, parts_only, show_bed, transparent_background); break; }
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
     default: { _render_thumbnail_legacy(thumbnail_data, w, h, printable_only, parts_only, show_bed, transparent_background); break; }
     }
 }
@@ -2065,8 +2163,15 @@ void GLCanvas3D::reload_scene(bool refresh_immediately, bool force_full_scene_re
     if ((m_canvas == nullptr) || (m_config == nullptr) || (m_model == nullptr))
         return;
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    if (!m_initialized)
+        return;
+    
+    _set_current();
+#else
     if (m_initialized)
         _set_current();
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 
     struct ModelVolumeState {
         ModelVolumeState(const GLVolume* volume) :
@@ -2662,8 +2767,13 @@ void GLCanvas3D::on_idle(wxIdleEvent& evt)
 
     m_dirty |= m_main_toolbar.update_items_state();
     m_dirty |= m_undoredo_toolbar.update_items_state();
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    m_dirty |= wxGetApp().plater()->get_view_toolbar().update_items_state();
+    bool mouse3d_controller_applied = wxGetApp().plater()->get_mouse3d_controller().apply(wxGetApp().plater()->get_camera());
+#else
     m_dirty |= m_view_toolbar.update_items_state();
     bool mouse3d_controller_applied = wxGetApp().plater()->get_mouse3d_controller().apply(m_camera);
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
     m_dirty |= mouse3d_controller_applied;
 
     if (!m_dirty)
@@ -2809,7 +2919,11 @@ void GLCanvas3D::on_char(wxKeyEvent& evt)
         case 'I':
         case 'i': { _update_camera_zoom(1.0); break; }
         case 'K':
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+        case 'k': { wxGetApp().plater()->get_camera().select_next_type(); m_dirty = true; break; }
+#else
         case 'k': { m_camera.select_next_type(); m_dirty = true; break; }
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
         case 'O':
         case 'o': { _update_camera_zoom(-1.0); break; }
 #if ENABLE_RENDER_PICKING_PASS
@@ -2936,7 +3050,11 @@ void GLCanvas3D::on_key(wxKeyEvent& evt)
             Vec3d displacement;
             if (camera_space)
             {
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+                Eigen::Matrix<double, 3, 3, Eigen::DontAlign> inv_view_3x3 = wxGetApp().plater()->get_camera().get_view_matrix().inverse().matrix().block(0, 0, 3, 3);
+#else
                 Eigen::Matrix<double, 3, 3, Eigen::DontAlign> inv_view_3x3 = m_camera.get_view_matrix().inverse().matrix().block(0, 0, 3, 3);
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
                 displacement = multiplier * (inv_view_3x3 * direction);
                 displacement(2) = 0.0;
             }
@@ -3190,6 +3308,11 @@ std::string format_mouse_event_debug_message(const wxMouseEvent &evt)
 
 void GLCanvas3D::on_mouse(wxMouseEvent& evt)
 {
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    if (!m_initialized)
+        return;
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
+
 #if ENABLE_RETINA_GL
     const float scale = m_retina_helper->get_scale_factor();
     evt.SetX(evt.GetX() * scale);
@@ -3242,7 +3365,11 @@ void GLCanvas3D::on_mouse(wxMouseEvent& evt)
         return;
     }
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    if (wxGetApp().plater()->get_view_toolbar().on_mouse(evt, *this))
+#else
     if (m_view_toolbar.on_mouse(evt, *this))
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
     {
         if (evt.LeftUp() || evt.MiddleUp() || evt.RightUp())
             mouse_up_cleanup();
@@ -3405,7 +3532,12 @@ void GLCanvas3D::on_mouse(wxMouseEvent& evt)
             // we do not want to translate objects if the user just clicked on an object while pressing shift to remove it from the selection and then drag
             if (m_selection.contains_volume(get_first_hover_volume_idx()))
             {
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+                const Camera& camera = wxGetApp().plater()->get_camera();
+                if (std::abs(camera.get_dir_forward()(2)) < EPSILON)
+#else
                 if (std::abs(m_camera.get_dir_forward()(2)) < EPSILON)
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
                 {
                     // side view -> move selected volumes orthogonally to camera view direction
                     Linef3 ray = mouse_ray(pos);
@@ -3418,8 +3550,13 @@ void GLCanvas3D::on_mouse(wxMouseEvent& evt)
                     // vector from the starting position to the found intersection
                     Vec3d inters_vec = inters - m_mouse.drag.start_position_3D;
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+                    Vec3d camera_right = camera.get_dir_right();
+                    Vec3d camera_up = camera.get_dir_up();
+#else
                     Vec3d camera_right = m_camera.get_dir_right();
                     Vec3d camera_up = m_camera.get_dir_up();
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 
                     // finds projection of the vector along the camera axes
                     double projection_x = inters_vec.dot(camera_right);
@@ -3467,10 +3604,17 @@ void GLCanvas3D::on_mouse(wxMouseEvent& evt)
                 const Vec3d& orig = m_mouse.drag.start_position_3D;
                 double x = Geometry::deg2rad(pos(0) - orig(0)) * (double)TRACKBALLSIZE;
                 double y = Geometry::deg2rad(pos(1) - orig(1)) * (double)TRACKBALLSIZE;
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+                if (wxGetApp().plater()->get_mouse3d_controller().is_running() || (wxGetApp().app_config->get("use_free_camera") == "1"))
+                    wxGetApp().plater()->get_camera().rotate_local_around_target(Vec3d(y, x, 0.0));
+                else
+                    wxGetApp().plater()->get_camera().rotate_on_sphere(x, y, wxGetApp().preset_bundle->printers.get_edited_preset().printer_technology() != ptSLA);
+#else
                 if (wxGetApp().plater()->get_mouse3d_controller().is_running() || (wxGetApp().app_config->get("use_free_camera") == "1"))
                     m_camera.rotate_local_around_target(Vec3d(y, x, 0.0));
                 else
                     m_camera.rotate_on_sphere(x, y, wxGetApp().preset_bundle->printers.get_edited_preset().printer_technology() != ptSLA);
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 
                 m_dirty = true;
             }
@@ -3485,7 +3629,12 @@ void GLCanvas3D::on_mouse(wxMouseEvent& evt)
                 float z = 0.0f;
                 const Vec3d& cur_pos = _mouse_to_3d(pos, &z);
                 Vec3d orig = _mouse_to_3d(m_mouse.drag.start_position_2D, &z);
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+                Camera& camera = wxGetApp().plater()->get_camera();
+                camera.set_target(camera.get_target() + orig - cur_pos);
+#else
                 m_camera.set_target(m_camera.get_target() + orig - cur_pos);
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
                 m_dirty = true;
             }
             
@@ -3578,7 +3727,11 @@ void GLCanvas3D::on_mouse(wxMouseEvent& evt)
             tooltip = m_undoredo_toolbar.get_tooltip();
 
         if (tooltip.empty())
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+            tooltip = wxGetApp().plater()->get_view_toolbar().get_tooltip();
+#else
             tooltip = m_view_toolbar.get_tooltip();
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 
         set_tooltip(tooltip);
 
@@ -3932,7 +4085,12 @@ void GLCanvas3D::handle_layers_data_focus_event(const t_layer_height_range range
 
 void GLCanvas3D::update_ui_from_settings()
 {
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    Camera& camera = wxGetApp().plater()->get_camera();
+    camera.set_type(wxGetApp().app_config->get("use_perspective_camera"));
+#else
     m_camera.set_type(wxGetApp().app_config->get("use_perspective_camera"));
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
     m_dirty = true;
 
 #if ENABLE_RETINA_GL
@@ -3946,7 +4104,11 @@ void GLCanvas3D::update_ui_from_settings()
     if (new_scaling != orig_scaling) {
         BOOST_LOG_TRIVIAL(debug) << "GLCanvas3D: Scaling factor: " << new_scaling;
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+        camera.set_zoom(camera.get_zoom() * new_scaling / orig_scaling);
+#else
         m_camera.set_zoom(m_camera.get_zoom() * new_scaling / orig_scaling);
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
         _refresh_if_shown_on_screen();
     }
 #endif
@@ -3981,7 +4143,11 @@ Linef3 GLCanvas3D::mouse_ray(const Point& mouse_pos)
 
 double GLCanvas3D::get_size_proportional_to_max_bed_size(double factor) const
 {
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    return factor * wxGetApp().plater()->get_bed().get_bounding_box(false).max_size();
+#else
     return factor * m_bed.get_bounding_box(false).max_size();
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 }
 
 void GLCanvas3D::set_cursor(ECursorType type)
@@ -4042,7 +4208,11 @@ void GLCanvas3D::_render_undo_redo_stack(const bool is_undo, float pos_x) const
 {
     ImGuiWrapper* imgui = wxGetApp().imgui();
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    const float x = pos_x * (float)wxGetApp().plater()->get_camera().get_zoom() + 0.5f * (float)get_canvas_size().get_width();
+#else
     const float x = pos_x * (float)get_camera().get_zoom() + 0.5f * (float)get_canvas_size().get_width();
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
     imgui->set_next_window_pos(x, m_undoredo_toolbar.get_height(), ImGuiCond_Always, 0.5f, 0.0f);
     std::string title = is_undo ? L("Undo History") : L("Redo History");
     imgui->begin(_(title), ImGuiWindowFlags_NoMove | ImGuiWindowFlags_NoResize | ImGuiWindowFlags_NoCollapse);
@@ -4138,7 +4308,11 @@ void GLCanvas3D::_render_thumbnail_internal(ThumbnailData& thumbnail_data, bool
         // extends the near and far z of the frustrum to avoid the bed being clipped
 
         // box in eye space
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+        BoundingBoxf3 t_bed_box = wxGetApp().plater()->get_bed().get_bounding_box(true).transformed(camera.get_view_matrix());
+#else
         BoundingBoxf3 t_bed_box = m_bed.get_bounding_box(true).transformed(camera.get_view_matrix());
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
         near_z = -t_bed_box.max(2);
         far_z = -t_bed_box.min(2);
     }
@@ -4415,7 +4589,11 @@ void GLCanvas3D::_render_thumbnail_legacy(ThumbnailData& thumbnail_data, unsigne
 #endif // ENABLE_THUMBNAIL_GENERATOR_DEBUG_OUTPUT
 
     // restore the default framebuffer size to avoid flickering on the 3D scene
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    wxGetApp().plater()->get_camera().apply_viewport(0, 0, cnv_size.get_width(), cnv_size.get_height());
+#else
     m_camera.apply_viewport(0, 0, cnv_size.get_width(), cnv_size.get_height());
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 }
 #endif // ENABLE_THUMBNAIL_GENERATOR
 
@@ -4729,14 +4907,22 @@ BoundingBoxf3 GLCanvas3D::_max_bounding_box(bool include_gizmos, bool include_be
         bb.merge(BoundingBoxf3(sel_bb_center - extend_by, sel_bb_center + extend_by));
     }
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    bb.merge(wxGetApp().plater()->get_bed().get_bounding_box(include_bed_model));
+#else
     bb.merge(m_bed.get_bounding_box(include_bed_model));
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
     return bb;
 }
 
 #if ENABLE_THUMBNAIL_GENERATOR
 void GLCanvas3D::_zoom_to_box(const BoundingBoxf3& box, double margin_factor)
 {
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    wxGetApp().plater()->get_camera().zoom_to_box(box, margin_factor);
+#else
     m_camera.zoom_to_box(box, margin_factor);
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
     m_dirty = true;
 }
 #else
@@ -4750,7 +4936,11 @@ void GLCanvas3D::_zoom_to_box(const BoundingBoxf3& box)
 
 void GLCanvas3D::_update_camera_zoom(double zoom)
 {
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    wxGetApp().plater()->get_camera().update_zoom(zoom);
+#else
     m_camera.update_zoom(zoom);
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
     m_dirty = true;
 }
 
@@ -4941,7 +5131,11 @@ void GLCanvas3D::_render_bed(float theta, bool show_axes) const
 #if ENABLE_RETINA_GL
     scale_factor = m_retina_helper->get_scale_factor();
 #endif // ENABLE_RETINA_GL
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    wxGetApp().plater()->get_bed().render(const_cast<GLCanvas3D&>(*this), theta, scale_factor, show_axes);
+#else
     m_bed.render(const_cast<GLCanvas3D&>(*this), theta, scale_factor, show_axes);
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 }
 
 void GLCanvas3D::_render_objects() const
@@ -4963,7 +5157,11 @@ void GLCanvas3D::_render_objects() const
 
         if (m_config != nullptr)
         {
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+            const BoundingBoxf3& bed_bb = wxGetApp().plater()->get_bed().get_bounding_box(false);
+#else
             const BoundingBoxf3& bed_bb = m_bed.get_bounding_box(false);
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
             m_volumes.set_print_box((float)bed_bb.min(0), (float)bed_bb.min(1), 0.0f, (float)bed_bb.max(0), (float)bed_bb.max(1), (float)m_config->opt_float("max_print_height"));
             m_volumes.check_outside_state(m_config, nullptr);
         }
@@ -4979,19 +5177,37 @@ void GLCanvas3D::_render_objects() const
     m_shader.start_using();
     if (m_picking_enabled && !m_gizmos.is_dragging() && m_layers_editing.is_enabled() && (m_layers_editing.last_object_id != -1) && (m_layers_editing.object_max_z() > 0.0f)) {
         int object_id = m_layers_editing.last_object_id;
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+        m_volumes.render(GLVolumeCollection::Opaque, false, wxGetApp().plater()->get_camera().get_view_matrix(), [object_id](const GLVolume& volume) {
+            // Which volume to paint without the layer height profile shader?
+            return volume.is_active && (volume.is_modifier || volume.composite_id.object_id != object_id);
+            });
+#else
         m_volumes.render(GLVolumeCollection::Opaque, false, m_camera.get_view_matrix(), [object_id](const GLVolume& volume) {
             // Which volume to paint without the layer height profile shader?
             return volume.is_active && (volume.is_modifier || volume.composite_id.object_id != object_id);
         });
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
         // Let LayersEditing handle rendering of the active object using the layer height profile shader.
         m_layers_editing.render_volumes(*this, this->m_volumes);
     } else {
         // do not cull backfaces to show broken geometry, if any
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+        m_volumes.render(GLVolumeCollection::Opaque, m_picking_enabled, wxGetApp().plater()->get_camera().get_view_matrix(), [this](const GLVolume& volume) {
+            return (m_render_sla_auxiliaries || volume.composite_id.volume_id >= 0);
+            });
+#else
         m_volumes.render(GLVolumeCollection::Opaque, m_picking_enabled, m_camera.get_view_matrix(), [this](const GLVolume& volume) {
             return (m_render_sla_auxiliaries || volume.composite_id.volume_id >= 0);
         });
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
     }
+
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    m_volumes.render(GLVolumeCollection::Transparent, false, wxGetApp().plater()->get_camera().get_view_matrix());
+#else
     m_volumes.render(GLVolumeCollection::Transparent, false, m_camera.get_view_matrix());
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
     m_shader.stop_using();
 
     m_camera_clipping_plane = ClippingPlane::ClipsNothing();
@@ -5024,9 +5240,16 @@ void GLCanvas3D::_render_overlays() const
     glsafe(::glPushMatrix());
     glsafe(::glLoadIdentity());
     // ensure that the textures are renderered inside the frustrum
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    const Camera& camera = wxGetApp().plater()->get_camera();
+    glsafe(::glTranslated(0.0, 0.0, -(camera.get_near_z() + 0.005)));
+    // ensure that the overlay fits the frustrum near z plane
+    double gui_scale = camera.get_gui_scale();
+#else
     glsafe(::glTranslated(0.0, 0.0, -(m_camera.get_near_z() + 0.005)));
     // ensure that the overlay fits the frustrum near z plane
     double gui_scale = m_camera.get_gui_scale();
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
     glsafe(::glScaled(gui_scale, gui_scale, 1.0));
 
     _render_gizmos_overlay();
@@ -5076,7 +5299,11 @@ void GLCanvas3D::_render_volumes_for_picking() const
     glsafe(::glEnableClientState(GL_VERTEX_ARRAY));
     glsafe(::glEnableClientState(GL_NORMAL_ARRAY));
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    const Transform3d& view_matrix = wxGetApp().plater()->get_camera().get_view_matrix();
+#else
     const Transform3d& view_matrix = m_camera.get_view_matrix();
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
     for (size_t type = 0; type < 2; ++ type) {
 	    GLVolumeWithIdAndZList to_render = volumes_to_render(m_volumes.volumes, (type == 0) ? GLVolumeCollection::Opaque : GLVolumeCollection::Transparent, view_matrix);
 	    for (const GLVolumeWithIdAndZ& volume : to_render)
@@ -5136,7 +5363,11 @@ void GLCanvas3D::_render_main_toolbar() const
 #endif // ENABLE_RETINA_GL
 
     Size cnv_size = get_canvas_size();
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    float inv_zoom = (float)wxGetApp().plater()->get_camera().get_inv_zoom();
+#else
     float inv_zoom = (float)m_camera.get_inv_zoom();
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 
     float top = 0.5f * (float)cnv_size.get_height() * inv_zoom;
     float left = -0.5f * (m_main_toolbar.get_width() + m_undoredo_toolbar.get_width()) * inv_zoom;
@@ -5162,7 +5393,11 @@ void GLCanvas3D::_render_undoredo_toolbar() const
 #endif // ENABLE_RETINA_GL
 
     Size cnv_size = get_canvas_size();
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    float inv_zoom = (float)wxGetApp().plater()->get_camera().get_inv_zoom();
+#else
     float inv_zoom = (float)m_camera.get_inv_zoom();
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 
     float top = 0.5f * (float)cnv_size.get_height() * inv_zoom;
     float left = (m_main_toolbar.get_width() - 0.5f * (m_main_toolbar.get_width() + m_undoredo_toolbar.get_width())) * inv_zoom;
@@ -5172,25 +5407,50 @@ void GLCanvas3D::_render_undoredo_toolbar() const
 
 void GLCanvas3D::_render_view_toolbar() const
 {
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    GLToolbar& view_toolbar = wxGetApp().plater()->get_view_toolbar();
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
+
 #if ENABLE_RETINA_GL
 //     m_view_toolbar.set_scale(m_retina_helper->get_scale_factor());
     const float scale = m_retina_helper->get_scale_factor() * wxGetApp().toolbar_icon_scale();
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    view_toolbar.set_scale(scale); //! #ys_FIXME_experiment
+#else
     m_view_toolbar.set_scale(scale); //! #ys_FIXME_experiment
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 #else
 //     m_view_toolbar.set_scale(m_canvas->GetContentScaleFactor());
 //     m_view_toolbar.set_scale(wxGetApp().em_unit()*0.1f);
     const float size = int(GLGizmosManager::Default_Icons_Size * wxGetApp().toolbar_icon_scale());
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    view_toolbar.set_icons_size(size); //! #ys_FIXME_experiment
+#else
     m_view_toolbar.set_icons_size(size); //! #ys_FIXME_experiment
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 #endif // ENABLE_RETINA_GL
 
     Size cnv_size = get_canvas_size();
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    float inv_zoom = (float)wxGetApp().plater()->get_camera().get_inv_zoom();
+#else
     float inv_zoom = (float)m_camera.get_inv_zoom();
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 
     // places the toolbar on the bottom-left corner of the 3d scene
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    float top = (-0.5f * (float)cnv_size.get_height() + view_toolbar.get_height()) * inv_zoom;
+#else
     float top = (-0.5f * (float)cnv_size.get_height() + m_view_toolbar.get_height()) * inv_zoom;
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
     float left = -0.5f * (float)cnv_size.get_width() * inv_zoom;
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    view_toolbar.set_position(top, left);
+    view_toolbar.render(*this);
+#else
     m_view_toolbar.set_position(top, left);
     m_view_toolbar.render(*this);
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 }
 
 #if ENABLE_SHOW_CAMERA_TARGET
@@ -5469,10 +5729,16 @@ Vec3d GLCanvas3D::_mouse_to_3d(const Point& mouse_pos, float* z)
     if (m_canvas == nullptr)
         return Vec3d(DBL_MAX, DBL_MAX, DBL_MAX);
 
-
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    const Camera& camera = wxGetApp().plater()->get_camera();
+    const std::array<int, 4>& viewport = camera.get_viewport();
+    const Transform3d& modelview_matrix = camera.get_view_matrix();
+    const Transform3d& projection_matrix = camera.get_projection_matrix();
+#else
     const std::array<int, 4>& viewport = m_camera.get_viewport();
     const Transform3d& modelview_matrix = m_camera.get_view_matrix();
     const Transform3d& projection_matrix = m_camera.get_projection_matrix();
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 
     GLint y = viewport[3] - (GLint)mouse_pos(1);
     GLfloat mouse_z;

src/slic3r/GUI/GLCanvas3D.hpp

@@ -8,7 +8,9 @@
 #include "GLToolbar.hpp"
 #include "Event.hpp"
 #include "3DBed.hpp"
+#if !ENABLE_NON_STATIC_CANVAS_MANAGER
 #include "Camera.hpp"
+#endif // !ENABLE_NON_STATIC_CANVAS_MANAGER
 #include "Selection.hpp"
 #include "Gizmos/GLGizmosManager.hpp"
 #include "GUI_ObjectLayers.hpp"
@@ -26,6 +28,9 @@ class wxMouseEvent;
 class wxTimerEvent;
 class wxPaintEvent;
 class wxGLCanvas;
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+class wxGLContext;
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 
 // Support for Retina OpenGL on Mac OS
 #define ENABLE_RETINA_GL __APPLE__
@@ -406,9 +411,11 @@ private:
     LegendTexture m_legend_texture;
     WarningTexture m_warning_texture;
     wxTimer m_timer;
+#if !ENABLE_NON_STATIC_CANVAS_MANAGER
     Bed3D& m_bed;
     Camera& m_camera;
     GLToolbar& m_view_toolbar;
+#endif // !ENABLE_NON_STATIC_CANVAS_MANAGER
     LayersEditing m_layers_editing;
     Shader m_shader;
     Mouse m_mouse;
@@ -469,9 +476,17 @@ private:
     Labels m_labels;
 
 public:
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    explicit GLCanvas3D(wxGLCanvas* canvas);
+#else
     GLCanvas3D(wxGLCanvas* canvas, Bed3D& bed, Camera& camera, GLToolbar& view_toolbar);
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
     ~GLCanvas3D();
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    bool is_initialized() const { return m_initialized; }
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
+
     void set_context(wxGLContext* context) { m_context = context; }
 
     wxGLCanvas* get_wxglcanvas() { return m_canvas; }
@@ -518,9 +533,14 @@ public:
 
     void set_color_by(const std::string& value);
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    void refresh_camera_scene_box();
+#else
+    void refresh_camera_scene_box() { m_camera.set_scene_box(scene_bounding_box()); }
     const Camera& get_camera() const { return m_camera; }
-    const Shader& get_shader() const { return m_shader; }
     Camera& get_camera() { return m_camera; }
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
+    const Shader& get_shader() const { return m_shader; }
 
     BoundingBoxf3 volumes_bounding_box() const;
     BoundingBoxf3 scene_bounding_box() const;
@@ -614,7 +634,9 @@ public:
 
     void update_ui_from_settings();
 
+#if !ENABLE_NON_STATIC_CANVAS_MANAGER
     float get_view_toolbar_height() const { return m_view_toolbar.get_height(); }
+#endif // !ENABLE_NON_STATIC_CANVAS_MANAGER
 
     int get_move_volume_id() const { return m_mouse.drag.move_volume_idx; }
     int get_first_hover_volume_idx() const { return m_hover_volume_idxs.empty() ? -1 : m_hover_volume_idxs.front(); }
@@ -646,7 +668,6 @@ public:
     Linef3 mouse_ray(const Point& mouse_pos);
 
     void set_mouse_as_dragging() { m_mouse.dragging = true; }
-    void refresh_camera_scene_box() { m_camera.set_scene_box(scene_bounding_box()); }
     bool is_mouse_dragging() const { return m_mouse.dragging; }
 
     double get_size_proportional_to_max_bed_size(double factor) const;

src/slic3r/GUI/GLCanvas3DManager.cpp

@@ -1,3 +1,4 @@
+#include "libslic3r/libslic3r.h"
 #include "GLCanvas3DManager.hpp"
 #include "../../slic3r/GUI/GUI.hpp"
 #include "../../slic3r/GUI/AppConfig.hpp"
@@ -23,6 +24,7 @@
 namespace Slic3r {
 namespace GUI {
 
+#if !ENABLE_NON_STATIC_CANVAS_MANAGER
 GLCanvas3DManager::GLInfo::GLInfo()
     : m_detected(false)
     , m_version("")
@@ -33,6 +35,7 @@ GLCanvas3DManager::GLInfo::GLInfo()
     , m_max_anisotropy(0.0f)
 {
 }
+#endif // !ENABLE_NON_STATIC_CANVAS_MANAGER
 
 const std::string& GLCanvas3DManager::GLInfo::get_version() const
 {
@@ -188,22 +191,35 @@ std::string GLCanvas3DManager::GLInfo::to_string(bool format_as_html, bool exten
     return out.str();
 }
 
-GLCanvas3DManager::EMultisampleState GLCanvas3DManager::s_multisample = GLCanvas3DManager::MS_Unknown;
-bool GLCanvas3DManager::s_compressed_textures_supported = false;
-GLCanvas3DManager::EFramebufferType GLCanvas3DManager::s_framebuffers_type = GLCanvas3DManager::FB_None;
 GLCanvas3DManager::GLInfo GLCanvas3DManager::s_gl_info;
+bool GLCanvas3DManager::s_compressed_textures_supported = false;
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+GLCanvas3DManager::EMultisampleState GLCanvas3DManager::s_multisample = GLCanvas3DManager::EMultisampleState::Unknown;
+GLCanvas3DManager::EFramebufferType GLCanvas3DManager::s_framebuffers_type = GLCanvas3DManager::EFramebufferType::None;
+#else
+GLCanvas3DManager::EMultisampleState GLCanvas3DManager::s_multisample = GLCanvas3DManager::MS_Unknown;
+GLCanvas3DManager::EFramebufferType GLCanvas3DManager::s_framebuffers_type = GLCanvas3DManager::FB_None;
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 
+#if !ENABLE_NON_STATIC_CANVAS_MANAGER
 GLCanvas3DManager::GLCanvas3DManager()
     : m_context(nullptr)
     , m_gl_initialized(false)
 {
 }
+#endif // !ENABLE_NON_STATIC_CANVAS_MANAGER
 
 GLCanvas3DManager::~GLCanvas3DManager()
 {
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    if (m_context != nullptr)
+        delete m_context;
+#else
     this->destroy();
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 }
 
+#if !ENABLE_NON_STATIC_CANVAS_MANAGER
 bool GLCanvas3DManager::add(wxGLCanvas* canvas, Bed3D& bed, Camera& camera, GLToolbar& view_toolbar)
 {
     if (canvas == nullptr)
@@ -255,28 +271,50 @@ void GLCanvas3DManager::remove_all()
     m_canvases.clear();
 }
 
-unsigned int GLCanvas3DManager::count() const
+size_t GLCanvas3DManager::count() const
 {
-    return (unsigned int)m_canvases.size();
+    return m_canvases.size();
 }
+#endif // !ENABLE_NON_STATIC_CANVAS_MANAGER
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+bool GLCanvas3DManager::init_gl()
+#else
 void GLCanvas3DManager::init_gl()
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 {
     if (!m_gl_initialized)
     {
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+        if (glewInit() != GLEW_OK)
+        {
+            BOOST_LOG_TRIVIAL(error) << "Unable to init glew library";
+            return false;
+        }
+#else
         glewInit();
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
         m_gl_initialized = true;
         if (GLEW_EXT_texture_compression_s3tc)
             s_compressed_textures_supported = true;
         else
             s_compressed_textures_supported = false;
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+        if (GLEW_ARB_framebuffer_object)
+            s_framebuffers_type = EFramebufferType::Arb;
+        else if (GLEW_EXT_framebuffer_object)
+            s_framebuffers_type = EFramebufferType::Ext;
+        else
+            s_framebuffers_type = EFramebufferType::None;
+#else
         if (GLEW_ARB_framebuffer_object)
             s_framebuffers_type = FB_Arb;
         else if (GLEW_EXT_framebuffer_object)
             s_framebuffers_type = FB_Ext;
         else
             s_framebuffers_type = FB_None;
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 
         if (! s_gl_info.is_version_greater_or_equal_to(2, 0)) {
         	// Complain about the OpenGL version.
@@ -292,8 +330,21 @@ void GLCanvas3DManager::init_gl()
         	wxMessageBox(message, wxString("PrusaSlicer - ") + _(L("Unsupported OpenGL version")), wxOK | wxICON_ERROR);
         }
     }
+
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    return true;
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 }
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+wxGLContext* GLCanvas3DManager::init_glcontext(wxGLCanvas& canvas)
+{
+    if (m_context == nullptr)
+        m_context = new wxGLContext(&canvas);
+
+    return m_context;
+}
+#else
 bool GLCanvas3DManager::init(wxGLCanvas* canvas)
 {
     CanvasesMap::const_iterator it = do_get_canvas(canvas);
@@ -311,14 +362,21 @@ void GLCanvas3DManager::destroy()
         m_context = nullptr;
     }
 }
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 
+#if !ENABLE_NON_STATIC_CANVAS_MANAGER
 GLCanvas3D* GLCanvas3DManager::get_canvas(wxGLCanvas* canvas)
 {
     CanvasesMap::const_iterator it = do_get_canvas(canvas);
     return (it != m_canvases.end()) ? it->second : nullptr;
 }
+#endif // !ENABLE_NON_STATIC_CANVAS_MANAGER
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+wxGLCanvas* GLCanvas3DManager::create_wxglcanvas(wxWindow& parent)
+#else
 wxGLCanvas* GLCanvas3DManager::create_wxglcanvas(wxWindow *parent)
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 {
     int attribList[] = { 
     	WX_GL_RGBA,
@@ -336,7 +394,11 @@ wxGLCanvas* GLCanvas3DManager::create_wxglcanvas(wxWindow *parent)
     	0
     };
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    if (s_multisample == EMultisampleState::Unknown)
+#else
     if (s_multisample == MS_Unknown)
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
     {
         detect_multisample(attribList);
 //        // debug output
@@ -346,9 +408,14 @@ wxGLCanvas* GLCanvas3DManager::create_wxglcanvas(wxWindow *parent)
     if (! can_multisample())
         attribList[12] = 0;
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    return new wxGLCanvas(&parent, wxID_ANY, attribList, wxDefaultPosition, wxDefaultSize, wxWANTS_CHARS);
+#else
     return new wxGLCanvas(parent, wxID_ANY, attribList, wxDefaultPosition, wxDefaultSize, wxWANTS_CHARS);
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 }
 
+#if !ENABLE_NON_STATIC_CANVAS_MANAGER
 GLCanvas3DManager::CanvasesMap::iterator GLCanvas3DManager::do_get_canvas(wxGLCanvas* canvas)
 {
     return (canvas == nullptr) ? m_canvases.end() : m_canvases.find(canvas);
@@ -366,12 +433,17 @@ bool GLCanvas3DManager::init(GLCanvas3D& canvas)
 
     return canvas.init();
 }
+#endif // !ENABLE_NON_STATIC_CANVAS_MANAGER
 
 void GLCanvas3DManager::detect_multisample(int* attribList)
 {
     int wxVersion = wxMAJOR_VERSION * 10000 + wxMINOR_VERSION * 100 + wxRELEASE_NUMBER;
     bool enable_multisample = wxVersion >= 30003;
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    s_multisample = (enable_multisample && wxGLCanvas::IsDisplaySupported(attribList)) ? EMultisampleState::Enabled : EMultisampleState::Disabled;
+#else
     s_multisample = (enable_multisample && wxGLCanvas::IsDisplaySupported(attribList)) ? MS_Enabled : MS_Disabled;
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
     // Alternative method: it was working on previous version of wxWidgets but not with the latest, at least on Windows
     // s_multisample = enable_multisample && wxGLCanvas::IsExtensionSupported("WGL_ARB_multisample");
 }

src/slic3r/GUI/GLCanvas3DManager.hpp

@@ -23,22 +23,43 @@ class PrintObject;
 namespace GUI {
 
 class GLCanvas3D;
+#if !ENABLE_NON_STATIC_CANVAS_MANAGER
 class Bed3D;
 class GLToolbar;
 struct Camera;
+#endif // !ENABLE_NON_STATIC_CANVAS_MANAGER
 
 class GLCanvas3DManager
 {
 public:
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    enum class EFramebufferType : unsigned char
+    {
+        None,
+        Arb,
+        Ext
+    };
+#else
     enum EFramebufferType : unsigned char
     {
         FB_None,
         FB_Arb,
         FB_Ext
     };
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 
     class GLInfo
     {
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+        mutable bool m_detected{ false };
+        mutable int m_max_tex_size{ 0 };
+        mutable float m_max_anisotropy{ 0.0f };
+
+        mutable std::string m_version;
+        mutable std::string m_glsl_version;
+        mutable std::string m_vendor;
+        mutable std::string m_renderer;
+#else
         mutable bool m_detected;
 
         mutable std::string m_version;
@@ -48,9 +69,14 @@ public:
 
         mutable int m_max_tex_size;
         mutable float m_max_anisotropy;
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 
     public:
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+        GLInfo() = default;
+#else
         GLInfo();
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 
         const std::string& get_version() const;
         const std::string& get_glsl_version() const;
@@ -69,6 +95,14 @@ public:
     };
 
 private:
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    enum class EMultisampleState : unsigned char
+    {
+        Unknown,
+        Enabled,
+        Disabled
+    };
+#else
     enum EMultisampleState : unsigned char
     {
         MS_Unknown,
@@ -77,46 +111,79 @@ private:
     };
 
     typedef std::map<wxGLCanvas*, GLCanvas3D*> CanvasesMap;
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 
-    CanvasesMap m_canvases;
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    bool m_gl_initialized{ false };
+    wxGLContext* m_context{ nullptr };
+#else
     wxGLContext* m_context;
-    static GLInfo s_gl_info;
     bool m_gl_initialized;
-    static EMultisampleState s_multisample;
+    CanvasesMap m_canvases;
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
+    static GLInfo s_gl_info;
     static bool s_compressed_textures_supported;
+    static EMultisampleState s_multisample;
     static EFramebufferType s_framebuffers_type;
 
 public:
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    GLCanvas3DManager() = default;
+#else
     GLCanvas3DManager();
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
     ~GLCanvas3DManager();
 
+#if !ENABLE_NON_STATIC_CANVAS_MANAGER
     bool add(wxGLCanvas* canvas, Bed3D& bed, Camera& camera, GLToolbar& view_toolbar);
     bool remove(wxGLCanvas* canvas);
     void remove_all();
 
-    unsigned int count() const;
+    size_t count() const;
+#endif // !ENABLE_NON_STATIC_CANVAS_MANAGER
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    bool init_gl();
+#else
     void init_gl();
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    wxGLContext* init_glcontext(wxGLCanvas& canvas);
+#else
     bool init(wxGLCanvas* canvas);
     void destroy();
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 
+#if !ENABLE_NON_STATIC_CANVAS_MANAGER
     GLCanvas3D* get_canvas(wxGLCanvas* canvas);
+#endif // !ENABLE_NON_STATIC_CANVAS_MANAGER
 
-    static bool can_multisample() { return s_multisample == MS_Enabled; }
     static bool are_compressed_textures_supported() { return s_compressed_textures_supported; }
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    static bool can_multisample() { return s_multisample == EMultisampleState::Enabled; }
+    static bool are_framebuffers_supported() { return (s_framebuffers_type != EFramebufferType::None); }
+#else
+    static bool can_multisample() { return s_multisample == MS_Enabled; }
     static bool are_framebuffers_supported() { return (s_framebuffers_type != FB_None); }
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
     static EFramebufferType get_framebuffers_type() { return s_framebuffers_type; }
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    static wxGLCanvas* create_wxglcanvas(wxWindow& parent);
+#else
     static wxGLCanvas* create_wxglcanvas(wxWindow *parent);
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 
     static const GLInfo& get_gl_info() { return s_gl_info; }
 
 private:
+#if !ENABLE_NON_STATIC_CANVAS_MANAGER
     CanvasesMap::iterator do_get_canvas(wxGLCanvas* canvas);
     CanvasesMap::const_iterator do_get_canvas(wxGLCanvas* canvas) const;
 
     bool init(GLCanvas3D& canvas);
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
     static void detect_multisample(int* attribList);
 };
 

src/slic3r/GUI/GLSelectionRectangle.cpp

@@ -2,6 +2,9 @@
 #include "Camera.hpp"
 #include "3DScene.hpp"
 #include "GLCanvas3D.hpp"
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+#include "GUI_App.hpp"
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 
 #include <GL/glew.h>
 
@@ -35,7 +38,11 @@ namespace GUI {
 
         m_state = Off;
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+        const Camera& camera = wxGetApp().plater()->get_camera();
+#else
         const Camera& camera = canvas.get_camera();
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
         const std::array<int, 4>& viewport = camera.get_viewport();
         const Transform3d& modelview_matrix = camera.get_view_matrix();
         const Transform3d& projection_matrix = camera.get_projection_matrix();
@@ -68,7 +75,11 @@ namespace GUI {
         if (!is_dragging())
             return;
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+        const Camera& camera = wxGetApp().plater()->get_camera();
+#else
         const Camera& camera = canvas.get_camera();
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
         float inv_zoom = (float)camera.get_inv_zoom();
 
         Size cnv_size = canvas.get_canvas_size();

src/slic3r/GUI/GLTexture.cpp

@@ -2,6 +2,9 @@
 #include "GLTexture.hpp"
 
 #include "3DScene.hpp"
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+#include "GLCanvas3DManager.hpp"
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 
 #include <GL/glew.h>
 

src/slic3r/GUI/GLToolbar.cpp

@@ -3,7 +3,13 @@
 
 #include "GLToolbar.hpp"
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+#include "slic3r/GUI/GLCanvas3D.hpp"
+#include "slic3r/GUI/GUI_App.hpp"
+#include "slic3r/GUI/Camera.hpp"
+#else
 #include "../../slic3r/GUI/GLCanvas3D.hpp"
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 
 #include <GL/glew.h>
 
@@ -16,7 +22,6 @@
 namespace Slic3r {
 namespace GUI {
 
-
 wxDEFINE_EVENT(EVT_GLTOOLBAR_ADD, SimpleEvent);
 wxDEFINE_EVENT(EVT_GLTOOLBAR_DELETE, SimpleEvent);
 wxDEFINE_EVENT(EVT_GLTOOLBAR_DELETE_ALL, SimpleEvent);
@@ -626,7 +631,11 @@ std::string GLToolbar::update_hover_state_horizontal(const Vec2d& mouse_pos, GLC
 {
     // NB: mouse_pos is already scaled appropriately
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    float inv_zoom = (float)wxGetApp().plater()->get_camera().get_inv_zoom();
+#else
     float inv_zoom = (float)parent.get_camera().get_inv_zoom();
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
     float factor = m_layout.scale * inv_zoom;
 
     Size cnv_size = parent.get_canvas_size();
@@ -730,7 +739,11 @@ std::string GLToolbar::update_hover_state_vertical(const Vec2d& mouse_pos, GLCan
 {
     // NB: mouse_pos is already scaled appropriately
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    float inv_zoom = (float)wxGetApp().plater()->get_camera().get_inv_zoom();
+#else
     float inv_zoom = (float)parent.get_camera().get_inv_zoom();
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
     float factor = m_layout.scale * inv_zoom;
 
     Size cnv_size = parent.get_canvas_size();
@@ -846,7 +859,11 @@ int GLToolbar::contains_mouse_horizontal(const Vec2d& mouse_pos, const GLCanvas3
 {
     // NB: mouse_pos is already scaled appropriately
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    float inv_zoom = (float)wxGetApp().plater()->get_camera().get_inv_zoom();
+#else
     float inv_zoom = (float)parent.get_camera().get_inv_zoom();
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
     float factor = m_layout.scale * inv_zoom;
 
     Size cnv_size = parent.get_canvas_size();
@@ -919,7 +936,11 @@ int GLToolbar::contains_mouse_vertical(const Vec2d& mouse_pos, const GLCanvas3D&
 {
     // NB: mouse_pos is already scaled appropriately
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    float inv_zoom = (float)wxGetApp().plater()->get_camera().get_inv_zoom();
+#else
     float inv_zoom = (float)parent.get_camera().get_inv_zoom();
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
     float factor = m_layout.scale * inv_zoom;
 
     Size cnv_size = parent.get_canvas_size();
@@ -1071,7 +1092,11 @@ void GLToolbar::render_horizontal(const GLCanvas3D& parent) const
     int tex_width = m_icons_texture.get_width();
     int tex_height = m_icons_texture.get_height();
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    float inv_zoom = (float)wxGetApp().plater()->get_camera().get_inv_zoom();
+#else
     float inv_zoom = (float)parent.get_camera().get_inv_zoom();
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
     float factor = inv_zoom * m_layout.scale;
 
     float scaled_icons_size = m_layout.icons_size * factor;
@@ -1119,7 +1144,11 @@ void GLToolbar::render_vertical(const GLCanvas3D& parent) const
     int tex_width = m_icons_texture.get_width();
     int tex_height = m_icons_texture.get_height();
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    float inv_zoom = (float)wxGetApp().plater()->get_camera().get_inv_zoom();
+#else
     float inv_zoom = (float)parent.get_camera().get_inv_zoom();
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
     float factor = inv_zoom * m_layout.scale;
 
     float scaled_icons_size = m_layout.icons_size * factor;

src/slic3r/GUI/GUI_App.cpp

@@ -169,6 +169,23 @@ GUI_App::~GUI_App()
         delete preset_updater;
 }
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+std::string GUI_App::get_gl_info(bool format_as_html, bool extensions)
+{
+    return GLCanvas3DManager::get_gl_info().to_string(format_as_html, extensions);
+}
+
+wxGLContext* GUI_App::init_glcontext(wxGLCanvas& canvas)
+{
+    return m_canvas_mgr.init_glcontext(canvas);
+}
+
+bool GUI_App::init_opengl()
+{
+    return m_canvas_mgr.init_gl();
+}
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
+
 bool GUI_App::OnInit()
 {
     try {
@@ -575,7 +592,9 @@ void GUI_App::import_model(wxWindow *parent, wxArrayString& input_files) const
 bool GUI_App::switch_language()
 {
     if (select_language()) {
+#if !ENABLE_NON_STATIC_CANVAS_MANAGER
         _3DScene::remove_all_canvases();
+#endif // !ENABLE_NON_STATIC_CANVAS_MANAGER
         recreate_GUI();
         return true;
     } else {

src/slic3r/GUI/GUI_App.hpp

@@ -7,6 +7,9 @@
 #include "MainFrame.hpp"
 #include "ImGuiWrapper.hpp"
 #include "ConfigWizard.hpp"
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+#include "GLCanvas3DManager.hpp"
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 
 #include <wx/app.h>
 #include <wx/colour.h>
@@ -96,6 +99,9 @@ class GUI_App : public wxApp
     // Best translation language, provided by Windows or OSX, owned by wxWidgets.
     const wxLanguageInfo		 *m_language_info_best   = nullptr;
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    GLCanvas3DManager m_canvas_mgr;
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
     std::unique_ptr<ImGuiWrapper> m_imgui;
     std::unique_ptr<PrintHostJobQueue> m_printhost_job_queue;
     ConfigWizard* m_wizard;    // Managed by wxWindow tree
@@ -107,6 +113,12 @@ public:
     GUI_App();
     ~GUI_App() override;
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    static std::string get_gl_info(bool format_as_html, bool extensions);
+    wxGLContext* init_glcontext(wxGLCanvas& canvas);
+    bool init_opengl();
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
+
     static unsigned get_colour_approx_luma(const wxColour &colour);
     static bool     dark_mode();
     void            init_label_colours();

src/slic3r/GUI/GUI_Preview.cpp

@@ -27,31 +27,64 @@
 namespace Slic3r {
 namespace GUI {
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+View3D::View3D(wxWindow* parent, Model* model, DynamicPrintConfig* config, BackgroundSlicingProcess* process)
+    : m_canvas_widget(nullptr)
+    , m_canvas(nullptr)
+{
+    init(parent, model, config, process);
+}
+#else
 View3D::View3D(wxWindow* parent, Bed3D& bed, Camera& camera, GLToolbar& view_toolbar, Model* model, DynamicPrintConfig* config, BackgroundSlicingProcess* process)
     : m_canvas_widget(nullptr)
     , m_canvas(nullptr)
 {
     init(parent, bed, camera, view_toolbar, model, config, process);
 }
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 
 View3D::~View3D()
 {
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    if (m_canvas != nullptr)
+    {
+        m_canvas->unbind_event_handlers();
+        delete m_canvas;
+    }
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
+
     if (m_canvas_widget != nullptr)
     {
+#if !ENABLE_NON_STATIC_CANVAS_MANAGER
         _3DScene::remove_canvas(m_canvas_widget);
+#endif // !ENABLE_NON_STATIC_CANVAS_MANAGER
         delete m_canvas_widget;
         m_canvas = nullptr;
     }
 }
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+bool View3D::init(wxWindow* parent, Model* model, DynamicPrintConfig* config, BackgroundSlicingProcess* process)
+#else
 bool View3D::init(wxWindow* parent, Bed3D& bed, Camera& camera, GLToolbar& view_toolbar, Model* model, DynamicPrintConfig* config, BackgroundSlicingProcess* process)
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 {
     if (!Create(parent, wxID_ANY, wxDefaultPosition, wxDefaultSize, 0 /* disable wxTAB_TRAVERSAL */))
         return false;
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    m_canvas_widget = GLCanvas3DManager::create_wxglcanvas(*this);
+    if (m_canvas_widget == nullptr)
+        return false;
+
+    m_canvas = new GLCanvas3D(m_canvas_widget);
+    m_canvas->set_context(wxGetApp().init_glcontext(*m_canvas_widget));
+    m_canvas->bind_event_handlers();
+#else
     m_canvas_widget = GLCanvas3DManager::create_wxglcanvas(this);
     _3DScene::add_canvas(m_canvas_widget, bed, camera, view_toolbar);
     m_canvas = _3DScene::get_canvas(this->m_canvas_widget);
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 
     m_canvas->allow_multisample(GLCanvas3DManager::can_multisample());
     // XXX: If have OpenGL
@@ -163,9 +196,15 @@ void View3D::render()
         m_canvas->set_as_dirty();
 }
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+Preview::Preview(
+    wxWindow* parent, Model* model, DynamicPrintConfig* config,
+    BackgroundSlicingProcess* process, GCodePreviewData* gcode_preview_data, std::function<void()> schedule_background_process_func)
+#else
 Preview::Preview(
     wxWindow* parent, Bed3D& bed, Camera& camera, GLToolbar& view_toolbar, Model* model, DynamicPrintConfig* config, 
     BackgroundSlicingProcess* process, GCodePreviewData* gcode_preview_data, std::function<void()> schedule_background_process_func)
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
     : m_canvas_widget(nullptr)
     , m_canvas(nullptr)
     , m_double_slider_sizer(nullptr)
@@ -190,21 +229,39 @@ Preview::Preview(
     , m_volumes_cleanup_required(false)
 #endif // __linux__
 {
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    if (init(parent, model))
+#else
     if (init(parent, bed, camera, view_toolbar, model))
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
     {
         show_hide_ui_elements("none");
         load_print();
     }
 }
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+bool Preview::init(wxWindow* parent, Model* model)
+#else
 bool Preview::init(wxWindow* parent, Bed3D& bed, Camera& camera, GLToolbar& view_toolbar, Model* model)
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 {
     if (!Create(parent, wxID_ANY, wxDefaultPosition, wxDefaultSize, 0 /* disable wxTAB_TRAVERSAL */))
         return false;
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    m_canvas_widget = GLCanvas3DManager::create_wxglcanvas(*this);
+    if (m_canvas_widget == nullptr)
+        return false;
+
+    m_canvas = new GLCanvas3D(m_canvas_widget);
+    m_canvas->set_context(wxGetApp().init_glcontext(*m_canvas_widget));
+    m_canvas->bind_event_handlers();
+#else
     m_canvas_widget = GLCanvas3DManager::create_wxglcanvas(this);
     _3DScene::add_canvas(m_canvas_widget, bed, camera, view_toolbar);
     m_canvas = _3DScene::get_canvas(this->m_canvas_widget);
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
     m_canvas->allow_multisample(GLCanvas3DManager::can_multisample());
     m_canvas->set_config(m_config);
     m_canvas->set_model(model);
@@ -313,9 +370,19 @@ Preview::~Preview()
 {
     unbind_event_handlers();
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    if (m_canvas != nullptr)
+    {
+        m_canvas->unbind_event_handlers();
+        delete m_canvas;
+    }
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
+
     if (m_canvas_widget != nullptr)
     {
+#if !ENABLE_NON_STATIC_CANVAS_MANAGER
         _3DScene::remove_canvas(m_canvas_widget);
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
         delete m_canvas_widget;
         m_canvas = nullptr;
     }

src/slic3r/GUI/GUI_Preview.hpp

@@ -34,6 +34,9 @@ class GLCanvas3D;
 class GLToolbar;
 class Bed3D;
 struct Camera;
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+class Plater;
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 
 class View3D : public wxPanel
 {
@@ -41,7 +44,11 @@ class View3D : public wxPanel
     GLCanvas3D* m_canvas;
 
 public:
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    View3D(wxWindow* parent, Model* model, DynamicPrintConfig* config, BackgroundSlicingProcess* process);
+#else
     View3D(wxWindow* parent, Bed3D& bed, Camera& camera, GLToolbar& view_toolbar, Model* model, DynamicPrintConfig* config, BackgroundSlicingProcess* process);
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
     virtual ~View3D();
 
     wxGLCanvas* get_wxglcanvas() { return m_canvas_widget; }
@@ -69,7 +76,11 @@ public:
     void render();
 
 private:
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    bool init(wxWindow* parent, Model* model, DynamicPrintConfig* config, BackgroundSlicingProcess* process);
+#else
     bool init(wxWindow* parent, Bed3D& bed, Camera& camera, GLToolbar& view_toolbar, Model* model, DynamicPrintConfig* config, BackgroundSlicingProcess* process);
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 };
 
 class Preview : public wxPanel
@@ -109,8 +120,13 @@ class Preview : public wxPanel
     DoubleSlider::Control*       m_slider {nullptr};
 
 public:
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    Preview(wxWindow* parent, Model* model, DynamicPrintConfig* config,
+        BackgroundSlicingProcess* process, GCodePreviewData* gcode_preview_data, std::function<void()> schedule_background_process = []() {});
+#else
     Preview(wxWindow* parent, Bed3D& bed, Camera& camera, GLToolbar& view_toolbar, Model* model, DynamicPrintConfig* config,
         BackgroundSlicingProcess* process, GCodePreviewData* gcode_preview_data, std::function<void()> schedule_background_process = [](){});
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
     virtual ~Preview();
 
     wxGLCanvas* get_wxglcanvas() { return m_canvas_widget; }
@@ -137,7 +153,11 @@ public:
     bool is_loaded() const { return m_loaded; }
 
 private:
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    bool init(wxWindow* parent, Model* model);
+#else
     bool init(wxWindow* parent, Bed3D& bed, Camera& camera, GLToolbar& view_toolbar, Model* model);
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 
     void bind_event_handlers();
     void unbind_event_handlers();
@@ -170,7 +190,6 @@ private:
     void load_print_as_sla();
 
     void on_sliders_scroll_changed(wxCommandEvent& event);
-
 };
 
 } // namespace GUI

src/slic3r/GUI/Gizmos/GLGizmoHollow.cpp

@@ -9,6 +9,9 @@
 #include "slic3r/GUI/GUI_ObjectList.hpp"
 #include "slic3r/GUI/MeshUtils.hpp"
 #include "slic3r/GUI/Plater.hpp"
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+#include "slic3r/GUI/Camera.hpp"
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 #include "slic3r/GUI/PresetBundle.hpp"
 #include "libslic3r/SLAPrint.hpp"
 #include "libslic3r/TriangleMesh.hpp"
@@ -345,7 +348,11 @@ bool GLGizmoHollow::unproject_on_mesh(const Vec2d& mouse_pos, std::pair<Vec3f, V
     // !!! is it really necessary?
     //m_c->update_from_backend(m_parent, m_c->m_model_object);
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    const Camera& camera = wxGetApp().plater()->get_camera();
+#else
     const Camera& camera = m_parent.get_camera();
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
     const Selection& selection = m_parent.get_selection();
     const GLVolume* volume = selection.get_volume(*selection.get_volume_idxs().begin());
     Geometry::Transformation trafo = volume->get_instance_transformation();
@@ -460,7 +467,11 @@ bool GLGizmoHollow::gizmo_event(SLAGizmoEventType action, const Vec2d& mouse_pos
             points_inside.push_back(points[idx].cast<float>());
 
         // Only select/deselect points that are actually visible
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+        for (size_t idx : m_c->m_mesh_raycaster->get_unobscured_idxs(trafo, wxGetApp().plater()->get_camera(), points_inside, m_c->m_clipping_plane.get()))
+#else
         for (size_t idx :  m_c->m_mesh_raycaster->get_unobscured_idxs(trafo, m_parent.get_camera(), points_inside, m_c->m_clipping_plane.get()))
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
         {
             if (rectangle_status == GLSelectionRectangle::Deselect)
                 unselect_point(points_idxs[idx]);
@@ -1137,8 +1148,13 @@ void GLGizmoHollow::update_clipping_plane(bool keep_normal) const
 {
     if (! m_c->m_model_object)
         return;
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    Vec3d normal = (keep_normal && m_c->m_clipping_plane->get_normal() != Vec3d::Zero() ?
+        m_c->m_clipping_plane->get_normal() : -wxGetApp().plater()->get_camera().get_dir_forward());
+#else
     Vec3d normal = (keep_normal && m_c->m_clipping_plane->get_normal() != Vec3d::Zero() ?
                         m_c->m_clipping_plane->get_normal() : -m_parent.get_camera().get_dir_forward());
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 
     const Vec3d& center = m_c->m_model_object->instances[m_c->m_active_instance]->get_offset() + Vec3d(0., 0., m_z_shift);
     float dist = normal.dot(center);

src/slic3r/GUI/Gizmos/GLGizmoSlaSupports.cpp

@@ -13,6 +13,9 @@
 #include "slic3r/GUI/GUI.hpp"
 #include "slic3r/GUI/GUI_ObjectSettings.hpp"
 #include "slic3r/GUI/GUI_ObjectList.hpp"
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+#include "slic3r/GUI/Camera.hpp"
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 #include "slic3r/GUI/MeshUtils.hpp"
 #include "slic3r/GUI/Plater.hpp"
 #include "slic3r/GUI/PresetBundle.hpp"
@@ -414,7 +417,11 @@ bool GLGizmoSlaSupports::unproject_on_mesh(const Vec2d& mouse_pos, std::pair<Vec
     if (! m_c->m_mesh_raycaster)
         return false;
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    const Camera& camera = wxGetApp().plater()->get_camera();
+#else
     const Camera& camera = m_parent.get_camera();
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
     const Selection& selection = m_parent.get_selection();
     const GLVolume* volume = selection.get_volume(*selection.get_volume_idxs().begin());
     Geometry::Transformation trafo = volume->get_instance_transformation();
@@ -524,7 +531,11 @@ bool GLGizmoSlaSupports::gizmo_event(SLAGizmoEventType action, const Vec2d& mous
                 points_inside.push_back(points[idx].cast<float>());
 
             // Only select/deselect points that are actually visible
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+            for (size_t idx : m_c->m_mesh_raycaster->get_unobscured_idxs(trafo, wxGetApp().plater()->get_camera(), points_inside, m_c->m_clipping_plane.get()))
+#else
             for (size_t idx :  m_c->m_mesh_raycaster->get_unobscured_idxs(trafo, m_parent.get_camera(), points_inside, m_c->m_clipping_plane.get()))
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
             {
                 if (rectangle_status == GLSelectionRectangle::Deselect)
                     unselect_point(points_idxs[idx]);
@@ -1321,8 +1332,14 @@ void GLGizmoSlaSupports::update_clipping_plane(bool keep_normal) const
 {
     if (! m_c->m_model_object)
         return;
+
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    Vec3d normal = (keep_normal && m_c->m_clipping_plane->get_normal() != Vec3d::Zero() ?
+        m_c->m_clipping_plane->get_normal() : -wxGetApp().plater()->get_camera().get_dir_forward());
+#else
     Vec3d normal = (keep_normal && m_c->m_clipping_plane->get_normal() != Vec3d::Zero() ?
         m_c->m_clipping_plane->get_normal() : -m_parent.get_camera().get_dir_forward());
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 
     const Vec3d& center = m_c->m_model_object->instances[m_c->m_active_instance]->get_offset() + Vec3d(0., 0., m_z_shift);
     float dist = normal.dot(center);

src/slic3r/GUI/Gizmos/GLGizmosManager.cpp

@@ -2,6 +2,9 @@
 #include "GLGizmosManager.hpp"
 #include "slic3r/GUI/GLCanvas3D.hpp"
 #include "slic3r/GUI/3DScene.hpp"
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+#include "slic3r/GUI/Camera.hpp"
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 #include "slic3r/GUI/GUI_App.hpp"
 #include "slic3r/GUI/GUI_ObjectManipulation.hpp"
 #include "slic3r/GUI/PresetBundle.hpp"
@@ -884,8 +887,13 @@ void GLGizmosManager::do_render_overlay() const
 
     float cnv_w = (float)m_parent.get_canvas_size().get_width();
     float cnv_h = (float)m_parent.get_canvas_size().get_height();
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    float zoom = (float)wxGetApp().plater()->get_camera().get_zoom();
+    float inv_zoom = (float)wxGetApp().plater()->get_camera().get_inv_zoom();
+#else
     float zoom = (float)m_parent.get_camera().get_zoom();
     float inv_zoom = (float)m_parent.get_camera().get_inv_zoom();
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 
     float height = get_scaled_total_height();
     float width = get_scaled_total_width();
@@ -936,7 +944,11 @@ void GLGizmosManager::do_render_overlay() const
 
         GLTexture::render_sub_texture(icons_texture_id, zoomed_top_x, zoomed_top_x + zoomed_icons_size, zoomed_top_y - zoomed_icons_size, zoomed_top_y, { { u_left, v_bottom }, { u_right, v_bottom }, { u_right, v_top }, { u_left, v_top } });
         if (idx == m_current) {
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+            float toolbar_top = cnv_h - wxGetApp().plater()->get_view_toolbar().get_height();
+#else
             float toolbar_top = cnv_h - m_parent.get_view_toolbar_height();
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
             gizmo->render_input_window(width, 0.5f * cnv_h - zoomed_top_y * zoom, toolbar_top);
         }
         zoomed_top_y -= zoomed_stride_y;

src/slic3r/GUI/MainFrame.cpp

@@ -122,7 +122,9 @@ DPIFrame(NULL, wxID_ANY, "", wxDefaultPosition, wxDefaultSize, wxDEFAULT_FRAME_S
         wxGetApp().app_config->save();
 //         if (m_plater)
 //             m_plater->print = undef;
+#if !ENABLE_NON_STATIC_CANVAS_MANAGER
         _3DScene::remove_all_canvases();
+#endif // !ENABLE_NON_STATIC_CANVAS_MANAGER
 //         Slic3r::GUI::deregister_on_request_update_callback();
 
         // set to null tabs and a plater

src/slic3r/GUI/Plater.cpp

@@ -2031,8 +2031,13 @@ Plater::priv::priv(Plater *q, MainFrame *main_frame)
     sla_print.set_status_callback(statuscb);
     this->q->Bind(EVT_SLICING_UPDATE, &priv::on_slicing_update, this);
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    view3D = new View3D(q, &model, config, &background_process);
+    preview = new Preview(q, &model, config, &background_process, &gcode_preview_data, [this]() { schedule_background_process(); });
+#else
     view3D = new View3D(q, bed, camera, view_toolbar, &model, config, &background_process);
     preview = new Preview(q, bed, camera, view_toolbar, &model, config, &background_process, &gcode_preview_data, [this](){ schedule_background_process(); });
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
 
     panels.push_back(view3D);
     panels.push_back(preview);
@@ -2132,7 +2137,9 @@ Plater::priv::priv(Plater *q, MainFrame *main_frame)
     // Drop target:
     q->SetDropTarget(new PlaterDropTarget(q));   // if my understanding is right, wxWindow takes the owenership
 
+#if !ENABLE_NON_STATIC_CANVAS_MANAGER
     update_ui_from_settings();
+#endif // !ENABLE_NON_STATIC_CANVAS_MANAGER
     q->Layout();
 
     set_current_panel(view3D);
@@ -4530,7 +4537,8 @@ void Sidebar::set_btn_label(const ActionButtonType btn_type, const wxString& lab
 // Plater / Public
 
 Plater::Plater(wxWindow *parent, MainFrame *main_frame)
-    : wxPanel(parent), p(new priv(this, main_frame))
+    : wxPanel(parent)
+    , p(new priv(this, main_frame))
 {
     // Initialization performed in the private c-tor
 }
@@ -5626,6 +5634,33 @@ const Camera& Plater::get_camera() const
     return p->camera;
 }
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+Camera& Plater::get_camera()
+{
+    return p->camera;
+}
+
+const Bed3D& Plater::get_bed() const
+{
+    return p->bed;
+}
+
+Bed3D& Plater::get_bed()
+{
+    return p->bed;
+}
+
+const GLToolbar& Plater::get_view_toolbar() const
+{
+    return p->view_toolbar;
+}
+
+GLToolbar& Plater::get_view_toolbar()
+{
+    return p->view_toolbar;
+}
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
+
 const Mouse3DController& Plater::get_mouse3d_controller() const
 {
     return p->mouse3d_controller;

src/slic3r/GUI/Plater.hpp

@@ -280,6 +280,16 @@ public:
     bool init_view_toolbar();
 
     const Camera& get_camera() const;
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    Camera& get_camera();
+
+    const Bed3D& get_bed() const;
+    Bed3D& get_bed();
+
+    const GLToolbar& get_view_toolbar() const;
+    GLToolbar& get_view_toolbar();
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
+
     const Mouse3DController& get_mouse3d_controller() const;
     Mouse3DController& get_mouse3d_controller();
 

src/slic3r/GUI/Selection.cpp

@@ -439,6 +439,12 @@ void Selection::clear()
     update_type();
     this->set_bounding_boxes_dirty();
 
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    // this happens while the application is closing
+    if (wxGetApp().obj_manipul() == nullptr)
+        return;
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
+
     // resets the cache in the sidebar
     wxGetApp().obj_manipul()->reset_cache();
 

src/slic3r/GUI/SysInfoDialog.cpp

@@ -145,7 +145,11 @@ SysInfoDialog::SysInfoDialog()
             "</font>"
             "</body>"
             "</html>", bgr_clr_str, text_clr_str, text_clr_str,
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+            get_mem_info(true) + "<br>" + wxGetApp().get_gl_info(true, true));
+#else
             get_mem_info(true) + "<br>" + _3DScene::get_gl_info(true, true));
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
         m_opengl_info_html->SetPage(text);
         main_sizer->Add(m_opengl_info_html, 1, wxEXPAND | wxBOTTOM, 15);
     }
@@ -198,7 +202,11 @@ void SysInfoDialog::on_dpi_changed(const wxRect &suggested_rect)
 void SysInfoDialog::onCopyToClipboard(wxEvent &)
 {
     wxTheClipboard->Open();
+#if ENABLE_NON_STATIC_CANVAS_MANAGER
+    const auto text = get_main_info(false) + "\n" + wxGetApp().get_gl_info(false, true);
+#else
     const auto text = get_main_info(false)+"\n"+_3DScene::get_gl_info(false, true);
+#endif // ENABLE_NON_STATIC_CANVAS_MANAGER
     wxTheClipboard->SetData(new wxTextDataObject(text));
     wxTheClipboard->Close();
 }