python: added gl.AbstractTexture.unbind().

src/python/magnum/gl.cpp

@@ -1059,6 +1059,7 @@ void gl(py::module& m) {
         /** @todo compressed formats */
 
     PyNonDestructibleClass<GL::AbstractTexture>{m, "AbstractTexture", "Base for textures"}
+        .def_static("unbind", static_cast<void(*)(Int)>(&GL::AbstractTexture::unbind), "Unbind any texture from given texture unit")
         /** @todo limits */
         .def_property_readonly("id", &GL::AbstractTexture::id, "OpenGL texture ID")
         /** @todo list-taking bind */

src/python/magnum/test/test_gl_gl.py

@@ -311,6 +311,10 @@ class Shader(GLTestCase):
         with self.assertRaisesRegex(RuntimeError, "compilation failed"):
             a.compile()
 
+class AbstractTexture(GLTestCase):
+    def test_unbind(self):
+        gl.AbstractTexture.unbind(3)
+
 class Texture(GLTestCase):
     def test_minification_filter(self):
         a = gl.Texture2D()