8000 Cleanup Firefox SVG example. by anntzer · Pull Request #18981 · matplotlib/matplotlib · GitHub
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Cleanup Firefox SVG example. #18981

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Nov 20, 2020
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Cleanup Firefox SVG example. #18981

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58 changes: 23 additions & 35 deletions examples/showcase/firefox.py
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Original file line number Diff line number Diff line change
Expand Up @@ -22,50 +22,38 @@ def svg_parse(path):
'Q': (Path.CURVE3,)*2,
'C': (Path.CURVE4,)*3,
'Z': (Path.CLOSEPOLY,)}
path_re = re.compile(r'([MLHVCSQTAZ])([^MLHVCSQTAZ]+)', re.IGNORECASE)
float_re = re.compile(r'(?:[\s,]*)([+-]?\d+(?:\.\d+)?)')
vertices = []
codes = []
last = (0, 0)
for cmd, values in path_re.findall(path):
points = [float(v) for v in float_re.findall(values)]
points = np.array(points).reshape((len(points)//2, 2))
cmd_values = re.split("([A-Za-z])", path)[1:] # Split over commands.
for cmd, values in zip(cmd_values[::2], cmd_values[1::2]):
# Numbers are separated either by commas, or by +/- signs (but not at
# the beginning of the string).
points = ([*map(float, re.split(",|(?<!^)(?=[+-])", values))] if values
else [(0., 0.)]) # Only for "z/Z" (CLOSEPOLY).
points = np.reshape(points, (-1, 2))
if cmd.islower():
points += last
cmd = cmd.capitalize()
last = points[-1]
codes.extend(commands[cmd])
vertices.extend(points.tolist())
return codes, vertices
points += vertices[-1][-1]
codes.extend(commands[cmd.upper()])
vertices.append(points)
return np.array(codes), np.concatenate(vertices)

# SVG to matplotlib

# SVG to Matplotlib
codes, verts = svg_parse(firefox)
verts = np.array(verts)
path = Path(verts, codes)

# Make upside down
verts[:, 1] *= -1
xmin, xmax = verts[:, 0].min()-1, verts[:, 0].max()+1
ymin, ymax = verts[:, 1].min()-1, verts[:, 1].max()+1
xmin, ymin = verts.min(axis=0) - 1
xmax, ymax = verts.max(axis=0) + 1

fig = plt.figure(figsize=(5, 5))
ax = fig.add_axes([0.0, 0.0, 1.0, 1.0], frameon=False, aspect=1)
fig = plt.figure(figsize=(5, 5), facecolor="0.75") # gray background
ax = fig.add_axes([0, 0, 1, 1], frameon=False, aspect=1,
xlim=(xmin, xmax), # centering
ylim=(ymax, ymin), # centering, upside down
xticks=[], yticks=[]) # no ticks

# White outline (width = 6)
patch = patches.PathPatch(path, facecolor='None', edgecolor='w', lw=6)
ax.add_patch(patch)

ax.add_patch(patches.PathPatch(path, facecolor='none', edgecolor='w', lw=6))
# Actual shape with black outline
patch = patches.PathPatch(path, facecolor='orange', edgecolor='k', lw=2)
ax.add_patch(patch)

# Centering
ax.set_xlim(xmin, xmax)
ax.set_ylim(ymin, ymax)

# No ticks
ax.set_xticks([])
ax.set_yticks([])
ax.add_patch(patches.PathPatch(path, facecolor='orange', edgecolor='k', lw=2))

# Display
plt.show()
plt.show() # Display
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