File: agg_buffer_to_array.py

package info (click to toggle)
matplotlib 0.98.1-1%2Blenny4
  • links: PTS
  • area: main
  • in suites: lenny
  • size: 18,624 kB
  • ctags: 22,599
  • sloc: python: 76,915; cpp: 63,459; ansic: 5,353; makefile: 111; sh: 12
file content (24 lines) | stat: -rw-r--r-- 550 bytes parent folder | download 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
 
import matplotlib
matplotlib.use('Agg')
from pylab import figure, show
import numpy as np

# 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 = np.fromstring(buf, np.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()