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104 lines
3.2 KiB
Python
104 lines
3.2 KiB
Python
9 years ago
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""":mod:`wand.font` --- Fonts
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.. versionadded:: 0.3.0
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:class:`Font` is an object which takes the :attr:`~Font.path` of font file,
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:attr:`~Font.size`, :attr:`~Font.color`, and whether to use
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:attr:`~Font.antialias`\ ing. If you want to use font by its name rather
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than the file path, use TTFQuery_ package. The font path resolution by its
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name is a very complicated problem to achieve.
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.. seealso::
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TTFQuery_ --- Find and Extract Information from TTF Files
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TTFQuery builds on the `FontTools-TTX`_ package to allow the Python
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programmer to accomplish a number of tasks:
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- query the system to find installed fonts
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- retrieve metadata about any TTF font file
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- this includes the glyph outlines (shape) of individual code-points,
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which allows for rendering the glyphs in 3D (such as is done in
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OpenGLContext)
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- lookup/find fonts by:
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- abstract family type
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- proper font name
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- build simple metadata registries for run-time font matching
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.. _TTFQuery: http://ttfquery.sourceforge.net/
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.. _FontTools-TTX: http://sourceforge.net/projects/fonttools/
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"""
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import numbers
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from .color import Color
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from .compat import string_type, text
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__all__ = 'Font',
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class Font(tuple):
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"""Font struct which is a subtype of :class:`tuple`.
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:param path: the path of the font file
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:type path: :class:`str`, :class:`basestring`
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:param size: the size of typeface. 0 by default which means *autosized*
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:type size: :class:`numbers.Real`
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:param color: the color of typeface. black by default
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:type color: :class:`~wand.color.Color`
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:param antialias: whether to use antialiasing. :const:`True` by default
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:type antialias: :class:`bool`
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.. versionchanged:: 0.3.9
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The ``size`` parameter becomes optional. Its default value is
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0, which means *autosized*.
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"""
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def __new__(cls, path, size=0, color=None, antialias=True):
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if not isinstance(path, string_type):
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raise TypeError('path must be a string, not ' + repr(path))
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if not isinstance(size, numbers.Real):
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raise TypeError('size must be a real number, not ' + repr(size))
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if color is None:
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color = Color('black')
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elif not isinstance(color, Color):
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raise TypeError('color must be an instance of wand.color.Color, '
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'not ' + repr(color))
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path = text(path)
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return tuple.__new__(cls, (path, size, color, bool(antialias)))
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@property
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def path(self):
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"""(:class:`basestring`) The path of font file."""
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return self[0]
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@property
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def size(self):
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"""(:class:`numbers.Real`) The font size in pixels."""
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return self[1]
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@property
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def color(self):
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"""(:class:`wand.color.Color`) The font color."""
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return self[2]
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@property
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def antialias(self):
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"""(:class:`bool`) Whether to apply antialiasing (``True``)
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or not (``False``).
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"""
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return self[3]
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def __repr__(self):
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return '{0.__module__}.{0.__name__}({1})'.format(
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type(self),
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tuple.__repr__(self)
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)
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