import moderngl
from moderngl_window.context.base import BaseWindow
from moderngl_window.context.headless.keys import Keys
class Window(BaseWindow):
"""Headless window.
Do not currently support any form window events or key input.
"""
#: Name of the window
name = "headless"
keys = Keys
[docs]
def __init__(self, **kwargs):
super().__init__(**kwargs)
self._fbo = None
self._vsync = False # We don't care about vsync in headless mode
self._resizable = False # headless window is not resizable
self._cursor = False # Headless don't have a cursor
self._headless = True
self.init_mgl_context()
self.set_default_viewport()
@property
def fbo(self) -> moderngl.Framebuffer:
"""moderngl.Framebuffer: The default framebuffer"""
return self._fbo
[docs]
def init_mgl_context(self) -> None:
"""Create an standalone context and framebuffer"""
if self._backend:
self._ctx = moderngl.create_standalone_context(
require=self.gl_version_code,
backend=self._backend,
)
else:
self._ctx = moderngl.create_standalone_context(
require=self.gl_version_code,
)
self._fbo = self.ctx.framebuffer(
color_attachments=self.ctx.texture(self.size, 4, samples=self._samples),
depth_attachment=self.ctx.depth_texture(self.size, samples=self._samples),
)
self.use()
[docs]
def use(self):
"""Bind the window's framebuffer"""
self._fbo.use()
[docs]
def clear(self, red=0.0, green=0.0, blue=0.0, alpha=0.0, depth=1.0, viewport=None):
"""
Binds and clears the default framebuffer
Args:
red (float): color component
green (float): color component
blue (float): color component
alpha (float): alpha component
depth (float): depth value
viewport (tuple): The viewport
"""
self.use()
self._ctx.clear(
red=red, green=green, blue=blue, alpha=alpha, depth=depth, viewport=viewport
)
[docs]
def swap_buffers(self) -> None:
"""
Placeholder. We currently don't do double buffering in headless mode.
This may change in the future.
"""
# NOTE: No double buffering currently
self._frames += 1
self._ctx.finish()
def _set_icon(self, icon_path: str) -> None:
"""Do nothing when icon is set"""
pass
def _set_fullscreen(self, value: bool) -> None:
"""Do nothing when fullscreen is toggled"""
pass
def _set_vsync(self, value: bool) -> None:
pass
[docs]
def destroy(self) -> None:
"""Destroy the context"""
self._ctx.release()