einarf
commented
1 year ago It's probably because get_color_buffer() reads the back buffer by default. It would work in the next frame.
Open Belissimo-T opened 1 year ago
einarf
commented
1 year ago It's probably because get_color_buffer() reads the back buffer by default. It would work in the next frame.
eschan145
commented
1 year ago @BelTol3011 you should probably add most of the example reproducible code before all the pyglet.info. It's kind of long. People might use the scrollbar to go past it accidentally, seeing the giant pyglet.info output. Just a suggestion.,
Belissimo-T
commented
1 year ago It would work in the next frame.
Sadly can't be. I added a call to pyglet.clock.schedule_interval() such that the on_draw method gets called repeatedly until the screenshot is made. It still doesn't work.
I hope that's what you mean with next frame.
import pyglet
pyglet.options["headless"] = True
from pyglet.graphics import Batch
from pyglet.window import Window
import PIL.Image
import io
batch = Batch()
window = Window(500, 500)
circle = pyglet.shapes.Circle(250, 250, 100, color=(255, 255, 0), batch=batch)
@window.event
def on_draw():
print("on_draw")
window.clear()
batch.draw()
def make_screenshot(_):
out = io.BytesIO()
pyglet.image.get_buffer_manager().get_color_buffer().save(file=out)
pil_img = PIL.Image.open(out, formats=("png",))
pil_img.show()
pyglet.app.exit()
pyglet.clock.schedule_interval(lambda _: None, 1 / 60)
pyglet.clock.schedule_once(make_screenshot, 2)
pyglet.app.run()
benmoran56
commented
1 year ago You can try changing the buffer which ColorBuffer is taking from. For example:
pyglet.image.ColorBufferImage.gl_buffer = pyglet.gl.GL_FRONTOn my Linux machine (AMD, Mesa stack) your example works. In my case it works with either GL_FRONT or GL_BACK buffers.
Belissimo-T
commented
1 year ago @benmoran56 I included your line in my program:
import pyglet
pyglet.options["headless"] = True
from pyglet.graphics import Batch
from pyglet.window import Window
import PIL.Image
import io
batch = Batch()
window = Window(500, 500)
window.set_caption("Transparent Window")
circle = pyglet.shapes.Circle(250, 250, 100, color=(255, 255, 0), batch=batch)
@window.event
def on_draw():
print("on_draw")
window.clear()
batch.draw()
def make_screenshot(_):
out = io.BytesIO()
pyglet.image.ColorBufferImage.gl_buffer = pyglet.gl.GL_FRONT
pyglet.image.get_buffer_manager().get_color_buffer().save(file=out)
pil_img = PIL.Image.open(out, formats=("png",))
pil_img.show()
pyglet.app.exit()
pyglet.clock.schedule_interval(lambda _: None, 1 / 60)
pyglet.clock.schedule_once(make_screenshot, 2)
pyglet.app.run()I now get the following exception when the make_screenshot()-function is called:
Traceback (most recent call last):
File "/home/bela/.config/JetBrains/PyCharm2022.3/scratches/scratch_29.py", line 40, in <module>
pyglet.app.run()
File "/home/bela/venv310/lib/python3.10/site-packages/pyglet/app/__init__.py", line 107, in run
event_loop.run()
File "/home/bela/venv310/lib/python3.10/site-packages/pyglet/app/base.py", line 169, in run
timeout = self.idle()
File "/home/bela/venv310/lib/python3.10/site-packages/pyglet/app/base.py", line 239, in idle
redraw_all = self.clock.call_scheduled_functions(dt)
File "/home/bela/venv310/lib/python3.10/site-packages/pyglet/clock.py", line 292, in call_scheduled_functions
item.func(now - item.last_ts, *item.args, **item.kwargs)
File "/home/bela/.config/JetBrains/PyCharm2022.3/scratches/scratch_29.py", line 29, in make_screenshot
pyglet.image.get_buffer_manager().get_color_buffer().save(file=out)
File "/home/bela/venv310/lib/python3.10/site-packages/pyglet/image/__init__.py", line 500, in save
encoder.encode(self, file, filename)
File "/home/bela/venv310/lib/python3.10/site-packages/pyglet/image/codecs/pil.py", line 129, in encode
image = image.get_image_data()
File "/home/bela/venv310/lib/python3.10/site-packages/pyglet/image/__init__.py", line 2046, in get_image_data
glReadBuffer(self.gl_buffer)
File "/home/bela/venv310/lib/python3.10/site-packages/pyglet/gl/lib.py", line 107, in errcheck
raise GLException(msg)
pyglet.gl.lib.GLException: b'invalid operation'With pyglet.gl.GL_BACK I still get the same blank image as in the initial bug report.
Describe the bug When executing the code below, I get shown the following image:
I expected this image:
wich is exactly what I get, when I comment line 3 (
pyglet.options["headless"] = True).I expect the headless and not-headless outputs to be identical (at least that's what I think is intuitive).
Let me know if the functionality in the
make_screenshotfunction supported in headless mode or how I can get an image of the frame buffer of a headless window, if they even have that.How To Reproduce I used the following code:
System Information: