latextools.py 文件源码

def latex_to_png_mpl(s, wrap):
    try:
        from matplotlib import mathtext
        from pyparsing import ParseFatalException
    except ImportError:
        return None

    # mpl mathtext doesn't support display math, force inline
    s = s.replace('$$', '$')
    if wrap:
        s = u'${0}$'.format(s)

    try:
        mt = mathtext.MathTextParser('bitmap')
        f = BytesIO()
        mt.to_png(f, s, fontsize=12)
        return f.getvalue()
    except (ValueError, RuntimeError, ParseFatalException):
        return None