def _output(self):
"""
Output the text and boxes belonging to the most recent page.
page = dvi._output()
"""
minx, miny, maxx, maxy = np.inf, np.inf, -np.inf, -np.inf
maxy_pure = -np.inf
for elt in self.text + self.boxes:
if len(elt) == 4: # box
x,y,h,w = elt
e = 0 # zero depth
else: # glyph
x,y,font,g,w = elt
h,e = font._height_depth_of(g)
minx = min(minx, x)
miny = min(miny, y - h)
maxx = max(maxx, x + w)
maxy = max(maxy, y + e)
maxy_pure = max(maxy_pure, y)
if self.dpi is None:
# special case for ease of debugging: output raw dvi coordinates
return mpl_cbook.Bunch(text=self.text, boxes=self.boxes,
width=maxx-minx, height=maxy_pure-miny,
descent=maxy-maxy_pure)
d = self.dpi / (72.27 * 2**16) # from TeX's "scaled points" to dpi units
text = [ ((x-minx)*d, (maxy-y)*d, f, g, w*d)
for (x,y,f,g,w) in self.text ]
boxes = [ ((x-minx)*d, (maxy-y)*d, h*d, w*d) for (x,y,h,w) in self.boxes ]
return mpl_cbook.Bunch(text=text, boxes=boxes,
width=(maxx-minx)*d,
height=(maxy_pure-miny)*d,
descent=(maxy-maxy_pure)*d)
def _register(self, words):
"""Register a font described by "words".
The format is, AFAIK: texname fontname [effects and filenames]
Effects are PostScript snippets like ".177 SlantFont",
filenames begin with one or two less-than signs. A filename
ending in enc is an encoding file, other filenames are font
files. This can be overridden with a left bracket: <[foobar
indicates an encoding file named foobar.
There is some difference between <foo.pfb and <<bar.pfb in
subsetting, but I have no example of << in my TeX installation.
"""
texname, psname = words[:2]
effects, encoding, filename = [], None, None
for word in words[2:]:
if not word.startswith('<'):
effects.append(word)
else:
word = word.lstrip('<')
if word.startswith('['):
assert encoding is None
encoding = word[1:]
elif word.endswith('.enc'):
assert encoding is None
encoding = word
else:
assert filename is None
filename = word
self._font[texname] = mpl_cbook.Bunch(texname=texname,
psname=psname,
effects=effects,
encoding=encoding,
filename=filename)
def _register(self, words):
"""Register a font described by "words".
The format is, AFAIK: texname fontname [effects and filenames]
Effects are PostScript snippets like ".177 SlantFont",
filenames begin with one or two less-than signs. A filename
ending in enc is an encoding file, other filenames are font
files. This can be overridden with a left bracket: <[foobar
indicates an encoding file named foobar.
There is some difference between <foo.pfb and <<bar.pfb in
subsetting, but I have no example of << in my TeX installation.
"""
# If the map file specifies multiple encodings for a font, we
# follow pdfTeX in choosing the last one specified. Such
# entries are probably mistakes but they have occurred.
# http://tex.stackexchange.com/questions/10826/
# http://article.gmane.org/gmane.comp.tex.pdftex/4914
texname, psname = words[:2]
effects, encoding, filename = '', None, None
for word in words[2:]:
if not word.startswith('<'):
effects = word
else:
word = word.lstrip('<')
if word.startswith('[') or word.endswith('.enc'):
if encoding is not None:
matplotlib.verbose.report(
'Multiple encodings for %s = %s' %
(texname, psname), 'debug')
if word.startswith('['):
encoding = word[1:]
else:
encoding = word
else:
assert filename is None
filename = word
eff = effects.split()
effects = {}
try:
effects['slant'] = float(eff[eff.index('SlantFont') - 1])
except ValueError:
pass
try:
effects['extend'] = float(eff[eff.index('ExtendFont') - 1])
except ValueError:
pass
self._font[texname] = mpl_cbook.Bunch(texname=texname,
psname=psname,
effects=effects,
encoding=encoding,
filename=filename)
def _register(self, words):
"""Register a font described by "words".
The format is, AFAIK: texname fontname [effects and filenames]
Effects are PostScript snippets like ".177 SlantFont",
filenames begin with one or two less-than signs. A filename
ending in enc is an encoding file, other filenames are font
files. This can be overridden with a left bracket: <[foobar
indicates an encoding file named foobar.
There is some difference between <foo.pfb and <<bar.pfb in
subsetting, but I have no example of << in my TeX installation.
"""
texname, psname = words[:2]
effects, encodings, filename = '', [], None
for word in words[2:]:
if not word.startswith('<'):
effects = word
else:
word = word.lstrip('<')
if word.startswith('['):
encodings.append(word[1:])
elif word.endswith('.enc'):
encodings.append(word)
else:
assert filename is None
filename = word
if len(encodings) > 1:
# TODO this is a stopgap workaround, need to handle this correctly
matplotlib.verbose.report(
'Multiple encodings for %s = %s, skipping' % (texname, psname),
'debug')
return
elif len(encodings) == 1:
encoding, = encodings
else:
encoding = None
eff = effects.split()
effects = {}
try:
effects['slant'] = float(eff[eff.index('SlantFont') - 1])
except ValueError:
pass
try:
effects['extend'] = float(eff[eff.index('ExtendFont') - 1])
except ValueError:
pass
self._font[texname] = mpl_cbook.Bunch(texname=texname,
psname=psname,
effects=effects,
encoding=encoding,
filename=filename)
def make_test_image_filenames(name, test_file):
"""
Create filenames for testing
Parameters
----------
name : str
An identifier for the specific test. This will make-up
part of the filenames.
test_file : str
Full path of the test file. This will determine the
directory structure
Returns
-------
out : Bunch
Object with 3 attributes to store the generated filenames
- result
- baseline
- expected
`result`, is the filename for the image generated by the test.
`baseline`, is the filename for the baseline image to which
the result will be compared.
`expected`, is the filename to the copy of the baseline that
will be stored in the same directory as the result image.
Creating a copy make comparison easier.
"""
if '.png' not in name:
name = name + '.png'
basedir = os.path.abspath(os.path.dirname(test_file))
basename = os.path.basename(test_file)
subdir = os.path.splitext(basename)[0]
baseline_dir = os.path.join(basedir, 'baseline_images', subdir)
result_dir = os.path.abspath(os.path.join('result_images', subdir))
if not os.path.exists(result_dir):
cbook.mkdirs(result_dir)
base, ext = os.path.splitext(name)
expected_name = '{}-{}{}'.format(base, 'expected', ext)
filenames = cbook.Bunch(baseline=os.path.join(baseline_dir, name),
result=os.path.join(result_dir, name),
expected=os.path.join(result_dir, expected_name))
return filenames
def start_pan(self, x, y, button):
angle = self._r_label1_position.to_values()[4] / 180.0 * npy.pi
mode = ''
if button == 1:
epsilon = npy.pi / 45.0
t, r = self.transData.inverted().transform_point((x, y))
if t >= angle - epsilon and t <= angle + epsilon:
mode = 'drag_r_labels'
elif button == 3:
mode = 'zoom'
self._pan_start = cbook.Bunch(
rmax=self.get_rmax(),
trans=self.transData.frozen(),
trans_inverse=self.transData.inverted().frozen(),
r_label_angle=self._r_label1_position.to_values()[4],
x=x,
y=y,
mode=mode)
# http://mirrors.ctan.org/systems/knuth/dist/texware/dvitype.web
# http://texdoc.net/texmf-dist/doc/generic/knuth/texware/dvitype.pdf
#
# The file consists of a preamble, some number of pages, a postamble,
# and a finale. Different opcodes are allowed in different contexts,
# so the Dvi object has a parser state:
#
# pre: expecting the preamble
# outer: between pages (followed by a page or the postamble,
# also e.g. font definitions are allowed)
# page: processing a page
# post_post: state after the postamble (our current implementation
# just stops reading)
# finale: the finale (unimplemented in our current implementation)
_dvistate = mpl_cbook.Bunch(pre=0, outer=1, inpage=2, post_post=3, finale=4)
# The marks on a page consist of text and boxes. A page also has dimensions.
Page = namedtuple('Page', 'text boxes height width descent')
Text = namedtuple('Text', 'x y font glyph width')
Box = namedtuple('Box', 'x y height width')
# Opcode argument parsing
#
# Each of the following functions takes a Dvi object and delta,
# which is the difference between the opcode and the minimum opcode
# with the same meaning. Dvi opcodes often encode the number of
# argument bytes in this delta.
def _arg_raw(dvi, delta):
def _finalize_packet(self):
self._chars[self._packet_char] = mpl_cbook.Bunch(
text=self.text, boxes=self.boxes, width=self._packet_width)
self.state = _dvistate.outer
