rgbcolor bug bites pdfs, casting to int solves it #4146
Description
Colored text breaks pdf saves. PNG saves and show() work fine.
It seems to be fixed by forcing the rgbcolor into ints, i.e. rgbcolor = (int(1),int(0),int(0)) works fine.
Here's an example:
t1 = text('Hi, this is a bug',(1,1), rgbcolor = (1,0,0))
t1.save(DATA+'bugplot.pdf')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/Users/mh/sagetest-notebook/worksheets/admin/73/code/7.py", line 6, in <module>
t1.save(DATA+\u0027bugplot.pdf\u0027)
File "/Volumes/D/sage-3.1.2/local/lib/python2.5/site-packages/SQLAlchemy-0.4.6-py2.5.egg/", line 1, in <module>
File "/Volumes/D/sage-3.1.2/local/lib/python2.5/site-packages/sage/plot/plot.py", line 1605, in save
canvas.print_figure(filename, dpi=dpi)
File "/Volumes/D/sage-3.1.2/local/lib/python2.5/site-packages/matplotlib/backend_bases.py", line 1310, in print_figure
**kwargs)
File "/Volumes/D/sage-3.1.2/local/lib/python2.5/site-packages/matplotlib/backend_bases.py", line 1204, in print_pdf
return pdf.print_pdf(*args, **kwargs)
File "/Volumes/D/sage-3.1.2/local/lib/python2.5/site-packages/matplotlib/backends/backend_pdf.py", line 1864, in print_pdf
self.figure.draw(renderer)
File "/Volumes/D/sage-3.1.2/local/lib/python2.5/site-packages/matplotlib/figure.py", line 759, in draw
for a in self.axes: a.draw(renderer)
File "/Volumes/D/sage-3.1.2/local/lib/python2.5/site-packages/matplotlib/axes.py", line 1523, in draw
a.draw(renderer)
File "/Volumes/D/sage-3.1.2/local/lib/python2.5/site-packages/matplotlib/text.py", line 329, in draw
ismath=self.is_math_text(line))
File "/Volumes/D/sage-3.1.2/local/lib/python2.5/site-packages/matplotlib/backends/backend_pdf.py", line 1428, in draw_text
self.check_gc(gc, gc._rgb)
File "/Volumes/D/sage-3.1.2/local/lib/python2.5/site-packages/matplotlib/backends/backend_pdf.py", line 1191, in check_gc
if delta: self.file.output(*delta)
File "/Volumes/D/sage-3.1.2/local/lib/python2.5/site-packages/matplotlib/backends/backend_pdf.py", line 451, in output
self.write(fill(map(pdfRepr, data)))
File "/Volumes/D/sage-3.1.2/local/lib/python2.5/site-packages/matplotlib/backends/backend_pdf.py", line 182, in pdfRepr
% type(obj)
TypeError: Don't know a PDF representation for <type 'sage.rings.integer.Integer'> objects.
Component: graphics
Keywords: pdf, save, text, rgbcolor
Issue created by migration from https://trac.sagemath.org/ticket/4146