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 transforms

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agg_buffer_to_array.py

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import matplotlib

matplotlib.use('Agg')

from pylab import figure, show

import numpy as npy

# make an agg figure

fig = figure()

ax = fig.add_subplot(111)

ax.plot([1,2,3])

ax.set_title('a simple figure')

fig.canvas.draw()

# grab rhe pixel buffer and dumpy it into a numpy array

buf = fig.canvas.buffer_rgba(0,0)

l, b, w, h = fig.bbox.bounds

X = npy.fromstring(buf, npy.uint8)

X.shape = h,w,4

# now display the array X as an Axes in a new figure

fig2 = figure()

ax2 = fig2.add_subplot(111, frameon=False)

ax2.imshow(X)

fig2.savefig('simple.png')

show()