Ensure the requested GL version is checked

Author: einarf

demosys/context/base.py

@@ -4,7 +4,7 @@
 import moderngl
 from demosys.conf import settings
 
-GLVersion = namedtuple('GLVersion', ['major', 'minor'])
+GLVersion = namedtuple('GLVersion', ['major', 'minor', 'code'])
 
 
 class Window:
@@ -26,12 +26,14 @@ def __init__(self):
         self.resources = None
         self.manager = None
 
-        self.gl_version = GLVersion(*settings.OPENGL['version'])
-        self.resizable = settings.WINDOW.get('resizable') or False
+        self.gl_version = GLVersion(
+            *settings.OPENGL['version'],
+            int("{}{}0".format(*settings.OPENGL['version']))
+        )
         self.title = settings.WINDOW.get('title') or "demosys-py"
         self.aspect_ratio = settings.WINDOW.get('aspect_ratio', 16 / 9)
 
-        self.resizable = settings.WINDOW.get('resizable')
+        self.resizable = settings.WINDOW.get('resizable') or False
         self.fullscreen = settings.WINDOW.get('fullscreen')
         self.vsync = settings.WINDOW.get('vsync')
         self.cursor = settings.WINDOW.get('cursor')
@@ -48,7 +50,7 @@ def draw(self, current_time, frame_time):
 
     def clear(self):
         """Clear the scren"""
-        self.ctx.screen.clear(
+        self.ctx.fbo.clear(
             red=self.clear_color[0],
             green=self.clear_color[1],
             blue=self.clear_color[2],

demosys/context/glfw.py

@@ -64,7 +64,7 @@ def __init__(self):
         glfw.set_window_size_callback(self.window, self.window_resize_callback)
 
         # Create mederngl context from existing context
-        self.ctx = moderngl.create_context()
+        self.ctx = moderngl.create_context(require=self.gl_version.code)
         context.WINDOW = self
         self.fbo = FBO()
         self.fbo.ctx = self.ctx

demosys/context/headless.py

@@ -18,7 +18,7 @@ def __init__(self):
             raise ImproperlyConfigured("HEADLESS_DURATION or HEADLESS_FRAMES not present in settings")
 
         self._close = False
-        self.ctx = moderngl.create_standalone_context()
+        self.ctx = moderngl.create_standalone_context(require=self.gl_version.code)
         context.WINDOW = self
 
         self.fbo = FBO()
@@ -27,7 +27,7 @@ def __init__(self):
             color_attachments=self.ctx.texture((self.width, self.height), 4),
             depth_attachment=self.ctx.depth_texture((self.width, self.height)),
         )
-        # self.fbo.default_framebuffer = True
+        self.fbo.default_framebuffer = True
         self.set_default_viewport()
 
     def draw(self, current_time, frame_time):

examples/settings.py

@@ -19,6 +19,8 @@
     "cursor": True,
 }
 
+HEADLESS_DURATION = 10.0
+
 MUSIC = None
 
 ROCKET = {