Platform: multisampling support in GlutApplication.

src/Platform/GlutApplication.cpp

@@ -53,7 +53,13 @@ void GlutApplication::createContext(Configuration* configuration) {
     CORRADE_ASSERT(!c, "GlutApplication::createContext(): context already created", );
 
     glutSetOption(GLUT_ACTION_ON_WINDOW_CLOSE, GLUT_ACTION_CONTINUE_EXECUTION);
-    glutInitDisplayMode(GLUT_DOUBLE|GLUT_RGBA|GLUT_DEPTH|GLUT_STENCIL);
+
+    unsigned int flags = GLUT_DOUBLE|GLUT_RGBA|GLUT_DEPTH|GLUT_STENCIL;
+
+    /* Multisampling */
+    if(configuration->sampleCount()) flags |= GLUT_MULTISAMPLE;
+
+    glutInitDisplayMode(flags);
     glutInitWindowSize(configuration->size().x(), configuration->size().y());
     glutCreateWindow(configuration->title().c_str());
     glutReshapeFunc(staticViewportEvent);

src/Platform/GlutApplication.h

@@ -296,9 +296,26 @@ class GlutApplication::Configuration {
             return this;
         }
 
+        /** @brief Sample count */
+        inline Int sampleCount() const { return _sampleCount; }
+
+        /**
+         * @brief Set sample count
+         * @return Pointer to self (for method chaining)
+         *
+         * Default is `0`, thus no multisampling. The actual sample count is
+         * ignored, GLUT either enables it or disables. See also
+         * @ref Renderer::Feature "Renderer::Feature::Multisampling".
+         */
+        inline Configuration* setSampleCount(Int count) {
+            _sampleCount = count;
+            return this;
+        }
+
     private:
         std::string _title;
         Vector2i _size;
+        Int _sampleCount;
 };
 
 /**