812 lines
28 KiB
Python
812 lines
28 KiB
Python
# ----------------------------------------------------------------------------
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# pyglet
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# Copyright (c) 2006-2008 Alex Holkner
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# Copyright (c) 2008-2021 pyglet contributors
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# * Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# * Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in
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# the documentation and/or other materials provided with the
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# distribution.
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# * Neither the name of pyglet nor the names of its
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# contributors may be used to endorse or promote products
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# derived from this software without specific prior written
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# permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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# ----------------------------------------------------------------------------
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"""Load application resources from a known path.
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Loading resources by specifying relative paths to filenames is often
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problematic in Python, as the working directory is not necessarily the same
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directory as the application's script files.
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This module allows applications to specify a search path for resources.
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Relative paths are taken to be relative to the application's ``__main__``
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module. ZIP files can appear on the path; they will be searched inside. The
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resource module also behaves as expected when applications are bundled using
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Freezers such as PyInstaller, py2exe, py2app, etc..
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In addition to providing file references (with the :py:func:`file` function),
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the resource module also contains convenience functions for loading images,
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textures, fonts, media and documents.
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3rd party modules or packages not bound to a specific application should
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construct their own :py:class:`Loader` instance and override the path to use the
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resources in the module's directory.
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Path format
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^^^^^^^^^^^
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The resource path :py:attr:`path` (see also :py:meth:`Loader.__init__` and
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:py:meth:`Loader.path`)
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is a list of locations to search for resources. Locations are searched in the
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order given in the path. If a location is not valid (for example, if the
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directory does not exist), it is skipped.
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Locations in the path beginning with an "at" symbol (''@'') specify
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Python packages. Other locations specify a ZIP archive or directory on the
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filesystem. Locations that are not absolute are assumed to be relative to the
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script home. Some examples::
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# Search just the `res` directory, assumed to be located alongside the
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# main script file.
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path = ['res']
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# Search the directory containing the module `levels.level1`, followed
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# by the `res/images` directory.
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path = ['@levels.level1', 'res/images']
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Paths are always **case-sensitive** and **forward slashes are always used**
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as path separators, even in cases when the filesystem or platform does not do this.
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This avoids a common programmer error when porting applications between platforms.
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The default path is ``['.']``. If you modify the path, you must call
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:py:func:`reindex`.
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.. versionadded:: 1.1
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"""
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import io
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import os
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import sys
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import zipfile
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import weakref
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import pyglet
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class ResourceNotFoundException(Exception):
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"""The named resource was not found on the search path."""
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def __init__(self, name):
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message = ('Resource "%s" was not found on the path. '
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'Ensure that the filename has the correct captialisation.') % name
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Exception.__init__(self, message)
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def get_script_home():
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"""Get the directory containing the program entry module.
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For ordinary Python scripts, this is the directory containing the
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``__main__`` module. For executables created with py2exe the result is
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the directory containing the running executable file. For OS X bundles
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created using Py2App the result is the Resources directory within the
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running bundle.
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If none of the above cases apply and the file for ``__main__`` cannot
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be determined the working directory is returned.
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When the script is being run by a Python profiler, this function
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may return the directory where the profiler is running instead of
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the directory of the real script. To workaround this behaviour the
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full path to the real script can be specified in :py:attr:`pyglet.resource.path`.
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:rtype: str
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"""
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frozen = getattr(sys, 'frozen', None)
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meipass = getattr(sys, '_MEIPASS', None)
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if meipass:
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# PyInstaller
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return meipass
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elif frozen in ('windows_exe', 'console_exe'):
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return os.path.dirname(sys.executable)
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elif frozen == 'macosx_app':
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# py2app
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return os.environ['RESOURCEPATH']
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else:
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main = sys.modules['__main__']
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if hasattr(main, '__file__'):
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return os.path.dirname(os.path.abspath(main.__file__))
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else:
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if 'python' in os.path.basename(sys.executable):
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# interactive
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return os.getcwd()
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else:
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# cx_Freeze
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return os.path.dirname(sys.executable)
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def get_settings_path(name):
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"""Get a directory to save user preferences.
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Different platforms have different conventions for where to save user
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preferences, saved games, and settings. This function implements those
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conventions. Note that the returned path may not exist: applications
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should use ``os.makedirs`` to construct it if desired.
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On Linux, a directory `name` in the user's configuration directory is
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returned (usually under ``~/.config``).
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On Windows (including under Cygwin) the `name` directory in the user's
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``Application Settings`` directory is returned.
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On Mac OS X the `name` directory under ``~/Library/Application Support``
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is returned.
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:Parameters:
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`name` : str
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The name of the application.
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:rtype: str
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"""
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if pyglet.compat_platform in ('cygwin', 'win32'):
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if 'APPDATA' in os.environ:
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return os.path.join(os.environ['APPDATA'], name)
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else:
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return os.path.expanduser('~/%s' % name)
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elif pyglet.compat_platform == 'darwin':
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return os.path.expanduser('~/Library/Application Support/%s' % name)
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elif pyglet.compat_platform.startswith('linux'):
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if 'XDG_CONFIG_HOME' in os.environ:
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return os.path.join(os.environ['XDG_CONFIG_HOME'], name)
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else:
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return os.path.expanduser('~/.config/%s' % name)
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else:
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return os.path.expanduser('~/.%s' % name)
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class Location:
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"""Abstract resource location.
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Given a location, a file can be loaded from that location with the `open`
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method. This provides a convenient way to specify a path to load files
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from, and not necessarily have that path reside on the filesystem.
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"""
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def open(self, filename, mode='rb'):
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"""Open a file at this location.
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:Parameters:
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`filename` : str
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The filename to open. Absolute paths are not supported.
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Relative paths are not supported by most locations (you
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should specify only a filename with no path component).
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`mode` : str
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The file mode to open with. Only files opened on the
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filesystem make use of this parameter; others ignore it.
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:rtype: file object
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"""
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raise NotImplementedError('abstract')
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class FileLocation(Location):
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"""Location on the filesystem.
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"""
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def __init__(self, path):
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"""Create a location given a relative or absolute path.
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:Parameters:
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`path` : str
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Path on the filesystem.
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"""
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self.path = path
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def open(self, filename, mode='rb'):
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return open(os.path.join(self.path, filename), mode)
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class ZIPLocation(Location):
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"""Location within a ZIP file.
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"""
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def __init__(self, zip, dir):
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"""Create a location given an open ZIP file and a path within that
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file.
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:Parameters:
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`zip` : ``zipfile.ZipFile``
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An open ZIP file from the ``zipfile`` module.
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`dir` : str
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A path within that ZIP file. Can be empty to specify files at
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the top level of the ZIP file.
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"""
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self.zip = zip
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self.dir = dir
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def open(self, filename, mode='rb'):
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if self.dir:
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path = self.dir + '/' + filename
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else:
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path = filename
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forward_slash_path = path.replace(os.sep, '/') # zip can only handle forward slashes
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text = self.zip.read(forward_slash_path)
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return io.BytesIO(text)
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class URLLocation(Location):
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"""Location on the network.
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This class uses the ``urlparse`` and ``urllib2`` modules to open files on
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the network given a URL.
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"""
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def __init__(self, base_url):
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"""Create a location given a base URL.
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:Parameters:
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`base_url` : str
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URL string to prepend to filenames.
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"""
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self.base = base_url
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def open(self, filename, mode='rb'):
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import urllib.parse, urllib.request
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url = urllib.parse.urljoin(self.base, filename)
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return urllib.request.urlopen(url)
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class Loader:
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"""Load program resource files from disk.
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The loader contains a search path which can include filesystem
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directories, ZIP archives and Python packages.
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:Ivariables:
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`path` : list of str
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List of search locations. After modifying the path you must
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call the `reindex` method.
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`script_home` : str
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Base resource location, defaulting to the location of the
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application script.
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"""
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def __init__(self, path=None, script_home=None):
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"""Create a loader for the given path.
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If no path is specified it defaults to ``['.']``; that is, just the
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program directory.
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See the module documentation for details on the path format.
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:Parameters:
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`path` : list of str
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List of locations to search for resources.
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`script_home` : str
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Base location of relative files. Defaults to the result of
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`get_script_home`.
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"""
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if path is None:
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path = ['.']
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if isinstance(path, str):
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path = [path]
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self.path = list(path)
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self._script_home = script_home or get_script_home()
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self._index = None
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# Map bin size to list of atlases
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self._texture_atlas_bins = {}
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# map name to image etc.
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self._cached_textures = weakref.WeakValueDictionary()
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self._cached_images = weakref.WeakValueDictionary()
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self._cached_animations = weakref.WeakValueDictionary()
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def _require_index(self):
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if self._index is None:
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self.reindex()
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def reindex(self):
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"""Refresh the file index.
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You must call this method if `path` is changed or the filesystem
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layout changes.
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"""
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self._index = {}
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for path in self.path:
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if path.startswith('@'):
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# Module
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name = path[1:]
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try:
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module = __import__(name)
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except:
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continue
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for component in name.split('.')[1:]:
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module = getattr(module, component)
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if hasattr(module, '__file__'):
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path = os.path.dirname(module.__file__)
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else:
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path = '' # interactive
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elif not os.path.isabs(path):
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# Add script base unless absolute
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assert r'\\' not in path, "Backslashes are not permitted in relative paths"
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path = os.path.join(self._script_home, path)
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if os.path.isdir(path):
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# Filesystem directory
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path = path.rstrip(os.path.sep)
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location = FileLocation(path)
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for dirpath, dirnames, filenames in os.walk(path):
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dirpath = dirpath[len(path) + 1:]
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# Force forward slashes for index
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if dirpath:
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parts = [part
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for part
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in dirpath.split(os.sep)
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if part is not None]
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dirpath = '/'.join(parts)
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for filename in filenames:
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if dirpath:
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index_name = dirpath + '/' + filename
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else:
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index_name = filename
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self._index_file(index_name, location)
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else:
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# Find path component that looks like the ZIP file.
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dir = ''
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old_path = None
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while path and not (os.path.isfile(path) or os.path.isfile(path + '.001')):
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old_path = path
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path, tail_dir = os.path.split(path)
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if path == old_path:
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break
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dir = '/'.join((tail_dir, dir))
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if path == old_path:
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continue
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dir = dir.rstrip('/')
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# path looks like a ZIP file, dir resides within ZIP
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if not path:
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continue
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zip_stream = self._get_stream(path)
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if zip_stream:
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zip = zipfile.ZipFile(zip_stream, 'r')
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location = ZIPLocation(zip, dir)
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for zip_name in zip.namelist():
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# zip_name_dir, zip_name = os.path.split(zip_name)
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# assert '\\' not in name_dir
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# assert not name_dir.endswith('/')
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if zip_name.startswith(dir):
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if dir:
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zip_name = zip_name[len(dir) + 1:]
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self._index_file(zip_name, location)
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def _get_stream(self, path):
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if zipfile.is_zipfile(path):
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return path
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elif not os.path.exists(path + '.001'):
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return None
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else:
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with open(path + '.001', 'rb') as volume:
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bytes_ = bytes(volume.read())
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volume_index = 2
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while os.path.exists(path + '.{0:0>3}'.format(volume_index)):
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with open(path + '.{0:0>3}'.format(volume_index), 'rb') as volume:
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bytes_ += bytes(volume.read())
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volume_index += 1
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zip_stream = io.BytesIO(bytes_)
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if zipfile.is_zipfile(zip_stream):
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return zip_stream
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else:
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return None
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def _index_file(self, name, location):
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if name not in self._index:
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self._index[name] = location
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def file(self, name, mode='rb'):
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"""Load a resource.
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:Parameters:
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`name` : str
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Filename of the resource to load.
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`mode` : str
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Combination of ``r``, ``w``, ``a``, ``b`` and ``t`` characters
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with the meaning as for the builtin ``open`` function.
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:rtype: file object
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"""
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self._require_index()
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try:
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location = self._index[name]
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return location.open(name, mode)
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except KeyError:
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raise ResourceNotFoundException(name)
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def location(self, name):
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"""Get the location of a resource.
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This method is useful for opening files referenced from a resource.
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For example, an HTML file loaded as a resource might reference some
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images. These images should be located relative to the HTML file, not
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looked up individually in the loader's path.
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:Parameters:
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`name` : str
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Filename of the resource to locate.
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:rtype: `Location`
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"""
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self._require_index()
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try:
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return self._index[name]
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except KeyError:
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raise ResourceNotFoundException(name)
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def add_font(self, name):
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"""Add a font resource to the application.
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Fonts not installed on the system must be added to pyglet before they
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can be used with `font.load`. Although the font is added with
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its filename using this function, it is loaded by specifying its
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family name. For example::
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resource.add_font('action_man.ttf')
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action_man = font.load('Action Man')
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:Parameters:
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`name` : str
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Filename of the font resource to add.
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"""
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self._require_index()
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from pyglet import font
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file = self.file(name)
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font.add_file(file)
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def _alloc_image(self, name, atlas, border):
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file = self.file(name)
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try:
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img = pyglet.image.load(name, file=file)
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finally:
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file.close()
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if not atlas:
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return img.get_texture(True)
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# find an atlas suitable for the image
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bin = self._get_texture_atlas_bin(img.width, img.height, border)
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if bin is None:
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return img.get_texture(True)
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return bin.add(img, border)
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def _get_texture_atlas_bin(self, width, height, border):
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"""A heuristic for determining the atlas bin to use for a given image
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size. Returns None if the image should not be placed in an atlas (too
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big), otherwise the bin (a list of TextureAtlas).
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"""
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# Large images are not placed in an atlas
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max_texture_size = pyglet.image.get_max_texture_size()
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max_size = min(2048, max_texture_size) - border
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if width > max_size or height > max_size:
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return None
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# Group images with small height separately to larger height
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# (as the allocator can't stack within a single row).
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bin_size = 1
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if height > max_size / 4:
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bin_size = 2
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try:
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texture_bin = self._texture_atlas_bins[bin_size]
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except KeyError:
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texture_bin = pyglet.image.atlas.TextureBin()
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self._texture_atlas_bins[bin_size] = texture_bin
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return texture_bin
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def image(self, name, flip_x=False, flip_y=False, rotate=0, atlas=True, border=1):
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"""Load an image with optional transformation.
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This is similar to `texture`, except the resulting image will be
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packed into a :py:class:`~pyglet.image.atlas.TextureBin` if it is an appropriate size for packing.
|
|
This is more efficient than loading images into separate textures.
|
|
|
|
:Parameters:
|
|
`name` : str
|
|
Filename of the image source to load.
|
|
`flip_x` : bool
|
|
If True, the returned image will be flipped horizontally.
|
|
`flip_y` : bool
|
|
If True, the returned image will be flipped vertically.
|
|
`rotate` : int
|
|
The returned image will be rotated clockwise by the given
|
|
number of degrees (a multiple of 90).
|
|
`atlas` : bool
|
|
If True, the image will be loaded into an atlas managed by
|
|
pyglet. If atlas loading is not appropriate for specific
|
|
texturing reasons (e.g. border control is required) then set
|
|
this argument to False.
|
|
`border` : int
|
|
Leaves specified pixels of blank space around each image in
|
|
an atlas, which may help reduce texture bleeding.
|
|
|
|
:rtype: `Texture`
|
|
:return: A complete texture if the image is large or not in an atlas,
|
|
otherwise a :py:class:`~pyglet.image.TextureRegion` of a texture atlas.
|
|
"""
|
|
self._require_index()
|
|
if name in self._cached_images:
|
|
identity = self._cached_images[name]
|
|
else:
|
|
identity = self._cached_images[name] = self._alloc_image(name, atlas, border)
|
|
|
|
if not rotate and not flip_x and not flip_y:
|
|
return identity
|
|
|
|
return identity.get_transform(flip_x, flip_y, rotate)
|
|
|
|
def animation(self, name, flip_x=False, flip_y=False, rotate=0, border=1):
|
|
"""Load an animation with optional transformation.
|
|
|
|
Animations loaded from the same source but with different
|
|
transformations will use the same textures.
|
|
|
|
:Parameters:
|
|
`name` : str
|
|
Filename of the animation source to load.
|
|
`flip_x` : bool
|
|
If True, the returned image will be flipped horizontally.
|
|
`flip_y` : bool
|
|
If True, the returned image will be flipped vertically.
|
|
`rotate` : int
|
|
The returned image will be rotated clockwise by the given
|
|
number of degrees (a multiple of 90).
|
|
`border` : int
|
|
Leaves specified pixels of blank space around each image in
|
|
an atlas, which may help reduce texture bleeding.
|
|
|
|
:rtype: :py:class:`~pyglet.image.Animation`
|
|
"""
|
|
self._require_index()
|
|
try:
|
|
identity = self._cached_animations[name]
|
|
except KeyError:
|
|
animation = pyglet.image.load_animation(name, self.file(name))
|
|
bin = self._get_texture_atlas_bin(animation.get_max_width(),
|
|
animation.get_max_height(),
|
|
border)
|
|
if bin:
|
|
animation.add_to_texture_bin(bin, border)
|
|
|
|
identity = self._cached_animations[name] = animation
|
|
|
|
if not rotate and not flip_x and not flip_y:
|
|
return identity
|
|
|
|
return identity.get_transform(flip_x, flip_y, rotate)
|
|
|
|
def get_cached_image_names(self):
|
|
"""Get a list of image filenames that have been cached.
|
|
|
|
This is useful for debugging and profiling only.
|
|
|
|
:rtype: list
|
|
:return: List of str
|
|
"""
|
|
self._require_index()
|
|
return list(self._cached_images.keys())
|
|
|
|
def get_cached_animation_names(self):
|
|
"""Get a list of animation filenames that have been cached.
|
|
|
|
This is useful for debugging and profiling only.
|
|
|
|
:rtype: list
|
|
:return: List of str
|
|
"""
|
|
self._require_index()
|
|
return list(self._cached_animations.keys())
|
|
|
|
def get_texture_bins(self):
|
|
"""Get a list of texture bins in use.
|
|
|
|
This is useful for debugging and profiling only.
|
|
|
|
:rtype: list
|
|
:return: List of :py:class:`~pyglet.image.atlas.TextureBin`
|
|
"""
|
|
self._require_index()
|
|
return list(self._texture_atlas_bins.values())
|
|
|
|
def media(self, name, streaming=True):
|
|
"""Load a sound or video resource.
|
|
|
|
The meaning of `streaming` is as for `media.load`. Compressed
|
|
sources cannot be streamed (that is, video and compressed audio
|
|
cannot be streamed from a ZIP archive).
|
|
|
|
:Parameters:
|
|
`name` : str
|
|
Filename of the media source to load.
|
|
`streaming` : bool
|
|
True if the source should be streamed from disk, False if
|
|
it should be entirely decoded into memory immediately.
|
|
|
|
:rtype: `media.Source`
|
|
"""
|
|
self._require_index()
|
|
from pyglet import media
|
|
try:
|
|
location = self._index[name]
|
|
if isinstance(location, FileLocation):
|
|
# Don't open the file if it's streamed from disk
|
|
path = os.path.join(location.path, name)
|
|
return media.load(path, streaming=streaming)
|
|
else:
|
|
file = location.open(name)
|
|
return media.load(name, file=file, streaming=streaming)
|
|
except KeyError:
|
|
raise ResourceNotFoundException(name)
|
|
|
|
def texture(self, name):
|
|
"""Load a texture.
|
|
|
|
The named image will be loaded as a single OpenGL texture. If the
|
|
dimensions of the image are not powers of 2 a :py:class:`~pyglet.image.TextureRegion` will
|
|
be returned.
|
|
|
|
:Parameters:
|
|
`name` : str
|
|
Filename of the image resource to load.
|
|
|
|
:rtype: `Texture`
|
|
"""
|
|
self._require_index()
|
|
if name in self._cached_textures:
|
|
return self._cached_textures[name]
|
|
|
|
file = self.file(name)
|
|
texture = pyglet.image.load(name, file=file).get_texture()
|
|
self._cached_textures[name] = texture
|
|
return texture
|
|
|
|
def model(self, name, batch=None):
|
|
"""Load a 3D model.
|
|
|
|
:Parameters:
|
|
`name` : str
|
|
Filename of the 3D model to load.
|
|
`batch` : Batch or None
|
|
An optional Batch instance to add this model to.
|
|
|
|
:rtype: `Model`
|
|
"""
|
|
self._require_index()
|
|
abspathname = os.path.join(os.path.abspath(self.location(name).path), name)
|
|
return pyglet.model.load(filename=abspathname, file=self.file(name), batch=batch)
|
|
|
|
def html(self, name):
|
|
"""Load an HTML document.
|
|
|
|
:Parameters:
|
|
`name` : str
|
|
Filename of the HTML resource to load.
|
|
|
|
:rtype: `FormattedDocument`
|
|
"""
|
|
self._require_index()
|
|
file = self.file(name)
|
|
return pyglet.text.load(name, file, 'text/html')
|
|
|
|
def attributed(self, name):
|
|
"""Load an attributed text document.
|
|
|
|
See `pyglet.text.formats.attributed` for details on this format.
|
|
|
|
:Parameters:
|
|
`name` : str
|
|
Filename of the attribute text resource to load.
|
|
|
|
:rtype: `FormattedDocument`
|
|
"""
|
|
self._require_index()
|
|
file = self.file(name)
|
|
return pyglet.text.load(name, file, 'text/vnd.pyglet-attributed')
|
|
|
|
def text(self, name):
|
|
"""Load a plain text document.
|
|
|
|
:Parameters:
|
|
`name` : str
|
|
Filename of the plain text resource to load.
|
|
|
|
:rtype: `UnformattedDocument`
|
|
"""
|
|
self._require_index()
|
|
file = self.file(name)
|
|
return pyglet.text.load(name, file, 'text/plain')
|
|
|
|
def get_cached_texture_names(self):
|
|
"""Get the names of textures currently cached.
|
|
|
|
:rtype: list of str
|
|
"""
|
|
self._require_index()
|
|
return list(self._cached_textures.keys())
|
|
|
|
|
|
#: Default resource search path.
|
|
#:
|
|
#: Locations in the search path are searched in order and are always
|
|
#: case-sensitive. After changing the path you must call `reindex`.
|
|
#:
|
|
#: See the module documentation for details on the path format.
|
|
#:
|
|
#: :type: list of str
|
|
path = []
|
|
|
|
|
|
class _DefaultLoader(Loader):
|
|
|
|
@property
|
|
def path(self):
|
|
return path
|
|
|
|
@path.setter
|
|
def path(self, value):
|
|
global path
|
|
path = value
|
|
|
|
|
|
_default_loader = _DefaultLoader()
|
|
reindex = _default_loader.reindex
|
|
file = _default_loader.file
|
|
location = _default_loader.location
|
|
add_font = _default_loader.add_font
|
|
image = _default_loader.image
|
|
animation = _default_loader.animation
|
|
model = _default_loader.model
|
|
media = _default_loader.media
|
|
texture = _default_loader.texture
|
|
html = _default_loader.html
|
|
attributed = _default_loader.attributed
|
|
text = _default_loader.text
|
|
get_cached_texture_names = _default_loader.get_cached_texture_names
|
|
get_cached_image_names = _default_loader.get_cached_image_names
|
|
get_cached_animation_names = _default_loader.get_cached_animation_names
|
|
get_texture_bins = _default_loader.get_texture_bins
|