Fix thumbnail rendering in CLI (#12129)

* Fix thumbnail rendering in CLI

* Remove OSMesa context flag

* Add stringified error message for glfwInit and glewInit

* micro refactor

---------

Co-authored-by: SoftFever <softfeverever@gmail.com>

src/slic3r/GUI/3DScene.cpp

@@ -462,9 +462,9 @@ void GLVolume::render_with_outline(const GUI::Size& cnv_size)
     }
     glsafe(::glClear(GL_DEPTH_BUFFER_BIT));
     if (tverts_range == std::make_pair<size_t, size_t>(0, -1))
-        model.render();
+        model.render(shader);
     else
-        model.render(this->tverts_range);
+        model.render(this->tverts_range, shader);
     glsafe(::glBindTexture(GL_TEXTURE_2D, 0));
 
     // 2nd. render pass, just a normal render with the depth buffer passed as a texture
@@ -576,15 +576,15 @@ void GLVolume::simple_render(GLShaderProgram* shader, ModelObjectPtrs& model_obj
                 }
             }
             if (tverts_range == std::make_pair<size_t, size_t>(0, -1))
-                m.render();
+                m.render(shader);
             else
-                m.render(this->tverts_range);
+                m.render(this->tverts_range, shader);
         }
     } else {
         if (tverts_range == std::make_pair<size_t, size_t>(0, -1))
-            model.render();
+            model.render(shader);
         else
-            model.render(this->tverts_range);
+            model.render(this->tverts_range, shader);
     }
     if (this->is_left_handed())
         glFrontFace(GL_CCW);

src/slic3r/GUI/Camera.cpp

@@ -55,7 +55,10 @@ void Camera::select_next_type()
 
 void Camera::auto_type(EType preferred_type)
 {
-    if (!wxGetApp().app_config->get_bool("auto_perspective")) return;
+    if (wxApp::GetInstance() == nullptr || wxGetApp().app_config == nullptr)
+        return;
+    if (!wxGetApp().app_config->get_bool("auto_perspective"))
+        return;
     if (preferred_type == EType::Perspective) {
         if (!m_prevent_auto_type) {
             set_type(preferred_type);
@@ -758,4 +761,3 @@ void Camera::update_target() {
 }
 } // GUI
 } // Slic3r
-

src/slic3r/GUI/GLModel.cpp

@@ -596,12 +596,12 @@ static GLenum get_index_type(const GLModel::Geometry& data)
     }
 }
 
-void GLModel::render()
+void GLModel::render(GLShaderProgram* shader)
 {
-    render(std::make_pair<size_t, size_t>(0, indices_count()));
+    render(std::make_pair<size_t, size_t>(0, indices_count()), shader);
 }
 
-void GLModel::render(const std::pair<size_t, size_t>& range)
+void GLModel::render(const std::pair<size_t, size_t>& range, GLShaderProgram* shader)
 {
     if (m_render_disabled)
         return;
@@ -609,7 +609,9 @@ void GLModel::render(const std::pair<size_t, size_t>& range)
     if (range.second == range.first)
         return;
 
-    GLShaderProgram* shader = wxGetApp().get_current_shader();
+    if (shader == nullptr && wxApp::GetInstance() != nullptr)
+        shader = wxGetApp().get_current_shader();
+
     if (shader == nullptr)
         return;
 

src/slic3r/GUI/GLModel.hpp

@@ -13,6 +13,7 @@ namespace Slic3r {
 
 class TriangleMesh;
 class Polygon;
+class GLShaderProgram;
 using Polygons = std::vector<Polygon, PointsAllocator<Polygon>>;
 class BuildVolume;
 
@@ -177,8 +178,8 @@ namespace GUI {
         const ColorRGBA& get_color() const { return m_render_data.geometry.color; }
 
         void reset();
-        void render();
-        void render(const std::pair<size_t, size_t>& range);
+        void render(GLShaderProgram* shader = nullptr);
+        void render(const std::pair<size_t, size_t>& range, GLShaderProgram* shader = nullptr);
         void render_instanced(unsigned int instances_vbo, unsigned int instances_count);
 
         bool is_initialized() const { return vertices_count() > 0 && indices_count() > 0; }
@@ -260,4 +261,3 @@ namespace GUI {
 } // namespace Slic3r
 
 #endif // slic3r_GLModel_hpp_
-

src/slic3r/GUI/OpenGLManager.cpp

@@ -253,7 +253,7 @@ bool OpenGLManager::init_gl(bool popup_error)
         glewExperimental = true;
         GLenum result = glewInit();
         if (result != GLEW_OK) {
-            BOOST_LOG_TRIVIAL(error) << "Unable to init glew library";
+            BOOST_LOG_TRIVIAL(error) << "Unable to init glew library, Error: " << glewGetErrorString(result);
             return false;
         }
 	//BOOST_LOG_TRIVIAL(info) << "glewInit Success."<< std::endl;

src/slic3r/GUI/PartPlate.cpp

@@ -3110,8 +3110,11 @@ bool PartPlate::set_shape(const Pointfs& shape, const Pointfs& exclude_areas, co
         calc_vertex_for_icons(3, m_lock_icon);
         calc_vertex_for_icons(4, m_plate_settings_icon);
         // ORCA also change bed_icon_count number in calc_vertex_for_icons() after adding or removing icons for circular shaped beds that uses vertical alingment for icons
-        PresetBundle* preset = wxGetApp().preset_bundle;
-        bool dual_bbl = (preset->is_bbl_vendor() && preset->get_printer_extruder_count() == 2);
+	    bool dual_bbl = false;
+	    if (m_plater) {
+	        PresetBundle* preset = wxGetApp().preset_bundle;
+	        dual_bbl = (preset->is_bbl_vendor() && preset->get_printer_extruder_count() == 2);
+	    }
         calc_vertex_for_icons(dual_bbl ? 5 : 6, m_plate_filament_map_icon);
         calc_vertex_for_icons(dual_bbl ? 6 : 5, m_move_front_icon);