ARB_direct_state_access support for creating meshes.

src/Magnum/Implementation/MeshState.cpp

@@ -96,6 +96,14 @@ MeshState::MeshState(Context& context, std::vector<std::string>& extensions): cu
     }
     #endif
 
+    #ifndef MAGNUM_TARGET_GLES
+    /* DSA create implementation (other cases handled above) */
+    if(context.isExtensionSupported<Extensions::GL::ARB::direct_state_access>()) {
+        extensions.push_back(Extensions::GL::ARB::direct_state_access::string());
+        createImplementation = &Mesh::createImplementationVAODSA;
+    }
+    #endif
+
     #ifdef MAGNUM_TARGET_GLES
     /* Multi draw implementation on ES */
     if(context.isExtensionSupported<Extensions::GL::EXT::multi_draw_arrays>()) {

src/Magnum/Mesh.cpp

@@ -335,7 +335,6 @@ void Mesh::createImplementationDefault() {
 }
 
 void Mesh::createImplementationVAO() {
-    _created = false;
     #ifndef MAGNUM_TARGET_GLES2
     glGenVertexArrays(1, &_id);
     #elif !defined(CORRADE_TARGET_EMSCRIPTEN) && !defined(CORRADE_TARGET_NACL)
@@ -343,9 +342,17 @@ void Mesh::createImplementationVAO() {
     #else
     CORRADE_ASSERT_UNREACHABLE();
     #endif
+    _created = false;
     CORRADE_INTERNAL_ASSERT(_id != Implementation::State::DisengagedBinding);
 }
 
+#ifndef MAGNUM_TARGET_GLES
+void Mesh::createImplementationVAODSA() {
+    glCreateVertexArrays(1, &_id);
+    _created = true;
+}
+#endif
+
 void Mesh::destroyImplementationDefault() {}
 
 void Mesh::destroyImplementationVAO() {

src/Magnum/Mesh.h

@@ -424,8 +424,11 @@ class MAGNUM_EXPORT Mesh: public AbstractObject {
          *
          * If @extension{ARB,vertex_array_object} (part of OpenGL 3.0), OpenGL
          * ES 3.0 or @es_extension{OES,vertex_array_object} in OpenGL ES 2.0 is
-         * available, vertex array object is created.
+         * available, vertex array object is created. If @extension{ARB,direct_state_access}
-         * @see @ref setPrimitive(), @ref setCount(), @fn_gl{GenVertexArrays}
+         * (part of OpenGL 4.5) is not supported, the vertex array object is
+         * created on first use.
+         * @see @ref setPrimitive(), @ref setCount(), @fn_gl{CreateVertexArrays},
+         *      eventually @fn_gl{GenVertexArrays}
          */
         explicit Mesh(MeshPrimitive primitive = MeshPrimitive::Triangles);
 
@@ -440,7 +443,7 @@ class MAGNUM_EXPORT Mesh: public AbstractObject {
          *
          * If @extension{ARB,vertex_array_object} (part of OpenGL 3.0), OpenGL
          * ES 3.0 or @es_extension{OES,vertex_array_object} in OpenGL ES 2.0 is
-         * available, vertex array object is deleted.
+         * available, associated vertex array object is deleted.
          * @see @fn_gl{DeleteVertexArrays}
          */
         ~Mesh();
@@ -954,6 +957,9 @@ class MAGNUM_EXPORT Mesh: public AbstractObject {
 
         void MAGNUM_LOCAL createImplementationDefault();
         void MAGNUM_LOCAL createImplementationVAO();
+        #ifndef MAGNUM_TARGET_GLES
+        void MAGNUM_LOCAL createImplementationVAODSA();
+        #endif
 
         void MAGNUM_LOCAL destroyImplementationDefault();
         void MAGNUM_LOCAL destroyImplementationVAO();