"""
This test loads a subset of the files in Willem van Schaik's PNG test
suite available here:
http://libpng.org/pub/png/pngsuite.html
The result should look like truth.png.
"""
from matplotlib import pyplot
import matplotlib.cm as cm
import glob
files = glob.glob("basn*.png")
files.sort()
plt.figure(figsize=(len(files), 2))
for i, fname in enumerate(files):
data = plt.imread(fname)
cmap = None # use default colormap
if data.ndim==2:
# keep grayscale images gray
cmap = cm.gray
plt.imshow(data, extent=[i,i+1,0,1], cmap=cmap)
plt.gca().get_frame().set_facecolor("#ddffff")
plt.gca().set_xlim(0, len(files))
plt.show()
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