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fix "Could not create GL context" (#1889)

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* fix "Could not create GL context"

* get available display in case of None spec - create context all the time
This commit is contained in:
Shashi Kant
2020-05-09 03:09:38 +05:30
committed by GitHub
parent a8d08c041d
commit dfbfab6237
1 changed files with 18 additions and 6 deletions
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24
gym/envs/classic_control/rendering.py
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@@ -43,19 +43,31 @@ def get_display(spec):
Pyglet only supports multiple Displays on Linux. Pyglet only supports multiple Displays on Linux.
""" """
if spec is None: if spec is None:
return None return pyglet.canvas.get_display()
# returns already available pyglet_display,
# if there is no pyglet display available then it creates one
elif isinstance(spec, str): elif isinstance(spec, str):
return pyglet.canvas.Display(spec) return pyglet.canvas.Display(spec)
else: else:
raise error.Error('Invalid display specification: {}. (Must be a string like :0 or None.)'.format(spec)) raise error.Error('Invalid display specification: {}. (Must be a string like :0 or None.)'.format(spec))
def get_window(width, height, display):
"""
Will create a pyglet window from the display specification provided.
"""
screen = display.get_screens() #available screens
config = screen[0].get_best_config() #selecting the first screen
context = config.create_context(None) #create GL context
return pyglet.window.Window(width=width, height=height, display=display, config=config, context=context)
class Viewer(object): class Viewer(object):
def __init__(self, width, height, display=None): def __init__(self, width, height, display=None):
display = get_display(display) display = get_display(display)
self.width = width self.width = width
self.height = height self.height = height
self.window = pyglet.window.Window(width=width, height=height, display=display) self.window = get_window(width=width, height=height, display=display)
self.window.on_close = self.window_closed_by_user self.window.on_close = self.window_closed_by_user
self.isopen = True self.isopen = True
self.geoms = [] self.geoms = []
@@ -329,8 +341,8 @@ class SimpleImageViewer(object):
scale = self.maxwidth / width scale = self.maxwidth / width
width = int(scale * width) width = int(scale * width)
height = int(scale * height) height = int(scale * height)
self.window = pyglet.window.Window(width=width, height=height, self.window = pyglet.window.Window(width=width, height=height,
display=self.display, vsync=False, resizable=True) display=self.display, vsync=False, resizable=True)
self.width = width self.width = width
self.height = height self.height = height
self.isopen = True self.isopen = True
@@ -345,9 +357,9 @@ class SimpleImageViewer(object):
self.isopen = False self.isopen = False
assert len(arr.shape) == 3, "You passed in an image with the wrong number shape" assert len(arr.shape) == 3, "You passed in an image with the wrong number shape"
image = pyglet.image.ImageData(arr.shape[1], arr.shape[0], image = pyglet.image.ImageData(arr.shape[1], arr.shape[0],
'RGB', arr.tobytes(), pitch=arr.shape[1]*-3) 'RGB', arr.tobytes(), pitch=arr.shape[1]*-3)
gl.glTexParameteri(gl.GL_TEXTURE_2D, gl.glTexParameteri(gl.GL_TEXTURE_2D,
gl.GL_TEXTURE_MAG_FILTER, gl.GL_NEAREST) gl.GL_TEXTURE_MAG_FILTER, gl.GL_NEAREST)
texture = image.get_texture() texture = image.get_texture()
texture.width = self.width texture.width = self.width