/[cvs]/fract/mandelzoom.cgi
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revision 1.6 by teddy, Mon Feb 26 03:13:13 2001 UTC revision 1.9 by teddy, Tue Jun 19 22:27:27 2001 UTC
# Line 1  Line 1 
1  #!/usr/bin/python  #!/usr/bin/python
2    
3  import cgi, Image, ImageDraw, sys, math  import cgi, Image, ImageDraw, sys, math, signal, errno, os
4  from string import atoi, atof  from string import atoi, atof
5    
6    def handler(signum, frame):
7        raise os.error, (errno.ETIME, "Timer expired")
8    
9    signal.alarm(55)
10    signal.signal(signal.SIGALRM, handler)
11    
12  # This is to get backtrace output  # This is to get backtrace output
13  sys.stderr = sys.stdout  sys.stderr = sys.stdout
14    
# Line 74  if not (form.has_key('type') and form['t Line 80  if not (form.has_key('type') and form['t
80          iy= atof(form['image.y'].value)          iy= atof(form['image.y'].value)
81          owidth= atof(form['owidth'].value)          owidth= atof(form['owidth'].value)
82          oheight= atof(form['oheight'].value)          oheight= atof(form['oheight'].value)
83          diagp= math.sqrt(width**2 + height**2)          diagp= math.sqrt(owidth**2 + oheight**2)
84          scale= diagp/diag          scale= diagp/diag
85          cx= (ix/scale) + (cx - (width / (scale*2)))          cx= (ix/scale) + (cx - (owidth / (scale*2)))
86          cy= ((height-iy)/scale) + (cy - (height / (scale*2)))          cy= ((oheight-iy)/scale) + (cy - (oheight / (scale*2)))
87      if form.has_key('zoom'):      if form.has_key('zoom'):
88          zoom=atof(form['zoom'].value)          zoom=atof(form['zoom'].value)
89          diag=diag/zoom          diag=diag/zoom
# Line 117  if not (form.has_key('type') and form['t Line 123  if not (form.has_key('type') and form['t
123          print '<INPUT TYPE=HIDDEN NAME="%s" VALUE="%s">' % var          print '<INPUT TYPE=HIDDEN NAME="%s" VALUE="%s">' % var
124      print '<INPUT TYPE=HIDDEN NAME=type VALUE="html">'      print '<INPUT TYPE=HIDDEN NAME=type VALUE="html">'
125    
126      print """</FORM>      print """</FORM><P>
127    After changing any settings, don't forget to change the "Zoom" setting
128    to "Pan" if you don't want to zoom when applying them.
129  </BODY></HTML>"""  </BODY></HTML>"""
130      sys.exit(0)      sys.exit(0)
131    
# Line 247  if c1.imag > 0 and c2.imag < 0: # the x Line 255  if c1.imag > 0 and c2.imag < 0: # the x
255      else:      else:
256          yto= yorig # End at x axis          yto= yorig # End at x axis
257    
258  drawrect((0, yfrom), (xmax, yto))  try:
259        drawrect((0, yfrom), (xmax, yto))
260    except os.error, the_error:
261        if the_error[0] != errno.ETIME:
262            raise os.error, the_error
263            
264    signal.alarm(0)
265    
266  print "Content-type: image/png"  print "Content-type: image/png"
267  print  print
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