Removed 'Use legacy OpenGL 1.1 rendering' option

src/slic3r/GUI/AppConfig.cpp

@@ -54,10 +54,9 @@ void AppConfig::set_defaults()
     if (get("preset_update").empty())
         set("preset_update", "1");
 
-    // Use OpenGL 1.1 even if OpenGL 2.0 is available. This is mainly to support some buggy Intel HD Graphics drivers.
-    // github.com/prusa3d/PrusaSlicer/issues/233
-    if (get("use_legacy_opengl").empty())
-        set("use_legacy_opengl", "0");
+    // remove old 'use_legacy_opengl' parameter from this config, if present
+    if (!get("use_legacy_opengl").empty())
+        erase("", "use_legacy_opengl");
 
 #if __APPLE__
     if (get("use_retina_opengl").empty())

src/slic3r/GUI/GLCanvas3D.cpp

@@ -198,8 +198,7 @@ void GLCanvas3D::Shader::_reset()
 #endif // !ENABLE_TEXTURES_FROM_SVG
 
 GLCanvas3D::LayersEditing::LayersEditing()
-    : m_use_legacy_opengl(false)
-    , m_enabled(false)
+    : m_enabled(false)
     , m_z_texture_id(0)
     , m_model_object(nullptr)
     , m_object_max_z(0.f)
@@ -274,12 +273,7 @@ void GLCanvas3D::LayersEditing::select_object(const Model &model, int object_id)
 
 bool GLCanvas3D::LayersEditing::is_allowed() const
 {
-    return !m_use_legacy_opengl && m_shader.is_initialized() && m_shader.get_shader()->shader_program_id > 0 && m_z_texture_id > 0;
-}
-
-void GLCanvas3D::LayersEditing::set_use_legacy_opengl(bool use_legacy_opengl)
-{
-    m_use_legacy_opengl = use_legacy_opengl;
+    return m_shader.is_initialized() && m_shader.get_shader()->shader_program_id > 0 && m_z_texture_id > 0;
 }
 
 bool GLCanvas3D::LayersEditing::is_enabled() const
@@ -1253,7 +1247,7 @@ void GLCanvas3D::post_event(wxEvent &&event)
     wxPostEvent(m_canvas, event);
 }
 
-bool GLCanvas3D::init(bool useVBOs, bool use_legacy_opengl)
+bool GLCanvas3D::init(bool useVBOs)
 {
     if (m_initialized)
         return true;
@@ -1311,7 +1305,6 @@ bool GLCanvas3D::init(bool useVBOs, bool use_legacy_opengl)
         return false;
 
     m_use_VBOs = useVBOs;
-    m_layers_editing.set_use_legacy_opengl(use_legacy_opengl);
 
     // on linux the gl context is not valid until the canvas is not shown on screen
     // we defer the geometry finalization of volumes until the first call to render()

src/slic3r/GUI/GLCanvas3D.hpp

@@ -197,7 +197,6 @@ class GLCanvas3D
         static const float THICKNESS_BAR_WIDTH;
         static const float THICKNESS_RESET_BUTTON_HEIGHT;
 
-        bool                        m_use_legacy_opengl;
         bool                        m_enabled;
         Shader                      m_shader;
         unsigned int                m_z_texture_id;
@@ -250,7 +249,6 @@ class GLCanvas3D
         void select_object(const Model &model, int object_id);
 
         bool is_allowed() const;
-        void set_use_legacy_opengl(bool use_legacy_opengl);
 
         bool is_enabled() const;
         void set_enabled(bool enabled);
@@ -492,7 +490,7 @@ public:
     wxGLCanvas* get_wxglcanvas() { return m_canvas; }
 	const wxGLCanvas* get_wxglcanvas() const { return m_canvas; }
 
-    bool init(bool useVBOs, bool use_legacy_opengl);
+    bool init(bool useVBOs);
     void post_event(wxEvent &&event);
 
     void set_as_dirty();

src/slic3r/GUI/GLCanvas3DManager.cpp

@@ -192,7 +192,6 @@ GLCanvas3DManager::GLInfo GLCanvas3DManager::s_gl_info;
 GLCanvas3DManager::GLCanvas3DManager()
     : m_context(nullptr)
     , m_gl_initialized(false)
-    , m_use_legacy_opengl(false)
     , m_use_VBOs(false)
 {
 }
@@ -268,8 +267,7 @@ void GLCanvas3DManager::init_gl()
     {
         glewInit();
         const AppConfig* config = GUI::get_app_config();
-        m_use_legacy_opengl = (config == nullptr) || (config->get("use_legacy_opengl") == "1");
-        m_use_VBOs = !m_use_legacy_opengl && s_gl_info.is_version_greater_or_equal_to(2, 0);
+        m_use_VBOs = s_gl_info.is_version_greater_or_equal_to(2, 0);
         m_gl_initialized = true;
         if (GLEW_EXT_texture_compression_s3tc)
             s_compressed_textures_supported = true;
@@ -325,16 +323,14 @@ bool GLCanvas3DManager::init(GLCanvas3D& canvas)
     if (!m_gl_initialized)
         init_gl();
 
-    return canvas.init(m_use_VBOs, m_use_legacy_opengl);
+    return canvas.init(m_use_VBOs);
 }
 
 void GLCanvas3DManager::detect_multisample(int* attribList)
 {
     int wxVersion = wxMAJOR_VERSION * 10000 + wxMINOR_VERSION * 100 + wxRELEASE_NUMBER;
     const AppConfig* app_config = GUI::get_app_config();
-    bool enable_multisample = app_config != nullptr
-        && app_config->get("use_legacy_opengl") != "1"
-        && wxVersion >= 30003;
+    bool enable_multisample = wxVersion >= 30003;
 
     s_multisample = (enable_multisample && wxGLCanvas::IsDisplaySupported(attribList)) ? MS_Enabled : MS_Disabled;
     // Alternative method: it was working on previous version of wxWidgets but not with the latest, at least on Windows

src/slic3r/GUI/GLCanvas3DManager.hpp

@@ -75,7 +75,6 @@ private:
     wxGLContext* m_context;
     static GLInfo s_gl_info;
     bool m_gl_initialized;
-    bool m_use_legacy_opengl;
     bool m_use_VBOs;
     static EMultisampleState s_multisample;
     static bool s_compressed_textures_supported;

src/slic3r/GUI/Preferences.cpp

@@ -97,16 +97,6 @@ void PreferencesDialog::build()
 	option = Option (def,"show_incompatible_presets");
 	m_optgroup->append_single_option_line(option);
 
-    // TODO: remove?
-	def.label = L("Use legacy OpenGL 1.1 rendering");
-	def.type = coBool;
-	def.tooltip = L("If you have rendering issues caused by a buggy OpenGL 2.0 driver, "
-					  "you may try to check this checkbox. This will disable the layer height "
-					  "editing and anti aliasing, so it is likely better to upgrade your graphics driver.");
-	def.set_default_value(new ConfigOptionBool{ app_config->get("use_legacy_opengl") == "1" });
-	option = Option (def,"use_legacy_opengl");
-	m_optgroup->append_single_option_line(option);
-
 #if __APPLE__
 	def.label = L("Use Retina resolution for the 3D scene");
 	def.type = coBool;
@@ -150,8 +140,7 @@ void PreferencesDialog::build()
 
 void PreferencesDialog::accept()
 {
-	if (m_values.find("no_defaults")       != m_values.end() ||
-		m_values.find("use_legacy_opengl") != m_values.end()) {
+    if (m_values.find("no_defaults") != m_values.end()) {
         warning_catcher(this, wxString::Format(_(L("You need to restart %s to make the changes effective.")), SLIC3R_APP_NAME));
 	}