arcade.Text(...) constructor crashes

[VukanJ]

Bug Report

Attempting to create a text object results in a crash.

System Info

ArchLinux (Linux 6.3.8-arch1-1)

Run this and paste the output here: python -m arcade
Arcade 2.6.17

vendor: NVIDIA Corporation
renderer: NVIDIA GeForce GTX 1070/PCIe/SSE2
version: (3, 3)
python: 3.10.8 | packaged by conda-forge | (main, Nov 22 2022, 08:26:04) [GCC 10.4.0]
platform: linux

Steps to reproduce

import arcade
arcade.Text("TEST", 0, 0)

### Actual behavior:
Crash. Traceback:
---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
File ~/.local/mambaforge/lib/python3.10/site-packages/pyglet/text/layout.py:678, in get_default_decoration_shader()
    677 try:
--> 678     return pyglet.gl.current_context.pyglet_text_decoration_shader
    679 except AttributeError:

AttributeError: 'NoneType' object has no attribute 'pyglet_text_decoration_shader'

During handling of the above exception, another exception occurred:

AttributeError                            Traceback (most recent call last)
Cell In[2], line 1
----> 1 arcade.Text("TEST", 0, 0)

File ~/.local/mambaforge/lib/python3.10/site-packages/arcade/text_pyglet.py:214, in Text.__init__(self, text, start_x, start_y, color, font_size, width, align, font_name, bold, italic, anchor_x, anchor_y, multiline, rotation)
    211     multiline = True
    213 adjusted_font = _attempt_font_name_resolution(font_name)
--> 214 self._label = pyglet.text.Label(
    215     text=text,
    216     x=start_x,
    217     y=start_y,
    218     font_name=adjusted_font,
    219     font_size=font_size,
    220     anchor_x=anchor_x,
    221     anchor_y=anchor_y,
    222     color=get_four_byte_color(color),
    223     width=width,
    224     align=align,
    225     bold=bold,
    226     italic=italic,
    227     multiline=multiline
    228 )
    229 self.rotation = rotation

File ~/.local/mambaforge/lib/python3.10/site-packages/pyglet/text/__init__.py:474, in Label.__init__(self, text, font_name, font_size, bold, italic, stretch, color, x, y, width, height, anchor_x, anchor_y, align, multiline, dpi, batch, group, rotation)
    422 """Create a plain text label.
    423 
    424 :Parameters:
   (...)
    471 
    472 """
    473 doc = decode_text(text)
--> 474 super().__init__(doc, x, y, width, height, anchor_x, anchor_y, multiline, dpi, batch, group, rotation)
    476 self.document.set_style(0, len(self.document.text), {
    477     'font_name': font_name,
    478     'font_size': font_size,
   (...)
    483     'align': align,
    484 })

File ~/.local/mambaforge/lib/python3.10/site-packages/pyglet/text/__init__.py:274, in DocumentLabel.__init__(self, document, x, y, width, height, anchor_x, anchor_y, multiline, dpi, batch, group, rotation)
    236 def __init__(self, document=None,
    237              x=0, y=0, width=None, height=None,
    238              anchor_x='left', anchor_y='baseline',
    239              multiline=False, dpi=None, batch=None, group=None, rotation=0):
    240     """Create a label for a given document.
    241 
    242     :Parameters:
   (...)
    272 
    273     """
--> 274     super().__init__(document, width, height, multiline, dpi, batch, group)
    275     self._x = x
    276     self._y = y

File ~/.local/mambaforge/lib/python3.10/site-packages/pyglet/text/layout.py:922, in TextLayout.__init__(self, document, width, height, multiline, dpi, batch, group, wrap_lines)
    920 self._user_group = group
    921 self.group_cache = {}
--> 922 self._initialize_groups()
    924 if batch is None:
    925     batch = graphics.Batch()

File ~/.local/mambaforge/lib/python3.10/site-packages/pyglet/text/layout.py:943, in TextLayout._initialize_groups(self)
    942 def _initialize_groups(self):
--> 943     decoration_shader = get_default_decoration_shader()
    944     self.background_decoration_group = self.decoration_class(decoration_shader, order=0, parent=self._user_group)
    945     self.foreground_decoration_group = self.decoration_class(decoration_shader, order=2, parent=self._user_group)

File ~/.local/mambaforge/lib/python3.10/site-packages/pyglet/text/layout.py:681, in get_default_decoration_shader()
    678     return pyglet.gl.current_context.pyglet_text_decoration_shader
    679 except AttributeError:
    680     pyglet.gl.current_context.pyglet_text_decoration_shader = shader.ShaderProgram(
--> 681         shader.Shader(decoration_vertex_source, 'vertex'),
    682         shader.Shader(decoration_fragment_source, 'fragment'),
    683     )
    684     return pyglet.gl.current_context.pyglet_text_decoration_shader

File ~/.local/mambaforge/lib/python3.10/site-packages/pyglet/graphics/shader.py:254, in Shader.__init__(self, source_string, shader_type)
    251     raise TypeError("The `shader_type` '{}' is not yet supported".format(shader_type))
    252 self.type = shader_type
--> 254 source_string = ShaderSource(source_string, _shader_types[shader_type]).validate()
    255 shader_source_utf8 = source_string.encode("utf8")
    256 source_buffer_pointer = cast(c_char_p(shader_source_utf8), POINTER(c_char))

File ~/.local/mambaforge/lib/python3.10/site-packages/pyglet/graphics/shader.py:202, in ShaderSource.__init__(self, source, source_type)
    198     raise ValueError("Shader source is empty")
    200 self._version = self._find_glsl_version()
--> 202 if pyglet.gl.current_context.get_info().get_opengl_api() == "gles":
    203     self._lines[0] = "#version 310 es"
    204     self._lines.insert(1, "precision mediump float;")

AttributeError: 'NoneType' object has no attribute 'get_info'

Expected behavior:

No crash

[caffeinepills]

You need to create a Window or OpenGL context before you create any text.

[eschan145]

Maybe we should put a helpful error message. The error output is confusing and not self-explanatory for beginners.