add option to suppress printing when creating context (#377)

mujoco_py/mjrendercontext.pyx

@@ -40,9 +40,9 @@ cdef class MjRenderContext(object):
         mjv_defaultOption(&self._vopt)
         mjr_defaultContext(&self._con)
 
-    def __init__(self, MjSim sim, bint offscreen=True, int device_id=-1, opengl_backend=None):
+    def __init__(self, MjSim sim, bint offscreen=True, int device_id=-1, opengl_backend=None, quiet=False):
         self.sim = sim
-        self._setup_opengl_context(offscreen, device_id, opengl_backend)
+        self._setup_opengl_context(offscreen, device_id, opengl_backend, quiet=quiet)
         self.offscreen = offscreen
 
         # Ensure the model data has been updated so that there
@@ -92,13 +92,13 @@ cdef class MjRenderContext(object):
                 raise RuntimeError('Window rendering not supported')
         self.con = WrapMjrContext(&self._con)
 
-    def _setup_opengl_context(self, offscreen, device_id, opengl_backend):
+    def _setup_opengl_context(self, offscreen, device_id, opengl_backend, quiet=False):
         if opengl_backend is None and (not offscreen or sys.platform == 'darwin'):
             # default to glfw for onscreen viewing or mac (both offscreen/onscreen)
             opengl_backend = 'glfw'
 
         if opengl_backend == 'glfw':
-            self.opengl_context = GlfwContext(offscreen=offscreen)
+            self.opengl_context = GlfwContext(offscreen=offscreen, quiet=quiet)
         else:
             if device_id < 0:
                 if "GPUS" in os.environ:

mujoco_py/opengl_context.pyx

@@ -40,12 +40,12 @@ class GlfwContext(OpenGLContext):
     _INIT_HEIGHT = 1000
     _GLFW_IS_INITIALIZED = False
 
-    def __init__(self, offscreen=False):
+    def __init__(self, offscreen=False, quiet=False):
         GlfwContext._init_glfw()
 
         self._width = self._INIT_WIDTH
         self._height = self._INIT_HEIGHT
-        self.window = self._create_window(offscreen)
+        self.window = self._create_window(offscreen, quiet=quiet)
         self._set_window_size(self._width, self._height)
 
     @staticmethod
@@ -73,14 +73,16 @@ class GlfwContext(OpenGLContext):
         self._width = width
         self._height = height
 
-    def _create_window(self, offscreen):
+    def _create_window(self, offscreen, quiet=False):
         if offscreen:
-            print("Creating offscreen glfw")
+            if not quiet:
+                print("Creating offscreen glfw")
             glfw.window_hint(glfw.VISIBLE, 0)
             glfw.window_hint(glfw.DOUBLEBUFFER, 0)
             init_width, init_height = self._INIT_WIDTH, self._INIT_HEIGHT
         else:
-            print("Creating window glfw")
+            if not quiet:
+                print("Creating window glfw")
             glfw.window_hint(glfw.SAMPLES, 4)
             glfw.window_hint(glfw.VISIBLE, 1)
             glfw.window_hint(glfw.DOUBLEBUFFER, 1)