pycairo on kubuntu karmic 9.10
King
setup.py install method as explained here:
http://www.wxpython.org/docs/api/wx.lib.wxcairo-module.html
KPackageKit shows that libcairo2 1.8.8-2ubuntu1 (i386) is installed.
While using "python setup.py install" I am getting this error:
/bin/sh: pkg-config: not found
Error: cairo >= 1.8.8 not found
Could somebody point me out what's missing here?
kubuntu 9.10 Karmic
python 2.6.4
Robin Dunn
There's no need to build it yourself, just install it from the Ubuntu
repository.
sudo apt-get install python-cairo
--
Robin Dunn
Software Craftsman
http://wxPython.org
King
Library is installed but lots of errors and segfaults
First:
ctx = cairo.GraphicsContext.Create(mdc)
File "/usr/lib/python2.6/dist-packages/wx-2.8-gtk2-unicode/wx/lib/
graphics.py", line 915, in Create
ctx = wx.lib.wxcairo.ContextFromDC(dc)
File "/usr/lib/python2.6/dist-packages/wx-2.8-gtk2-unicode/wx/lib/
wxcairo.py", line 115, in ContextFromDC
drawable = voidp( dc.GetGdkDrawable() )
File "/usr/lib/python2.6/dist-packages/wx-2.8-gtk2-unicode/wx/lib/
wxcairo.py", line 71, in voidp
return ctypes.c_void_p(int(ptr))
TypeError: int() argument must be a string or a number, not 'NoneType'
Second:
python: /build/buildd/cairo-1.8.8/src/cairo.c:87: _cairo_error:
Assertion `(status != CAIRO_STATUS_SUCCESS && status <=
CAIRO_STATUS_INVALID_WEIGHT)' failed.
Aborted
Prashant
#---- System Information ----#
GUI2Exe Version: 0.5.0
Operating System: Linux 2.6.31-14-generic i686
Python Version: 2.6.4rc2 (r264rc2:75497, Oct 20 2009, 02:55:11)
[GCC 4.4.1]
wxPython Version: 2.8.10.1 (gtk2-unicode)
wxPython Info: (__WXGTK__, wxGTK, unicode, gtk2, wx-assertions-off,
SWIG-1.3.29)
Python Encoding: Default=UTF-8 File=UTF-8
wxPython Encoding: utf-8
System Architecture: 32bit i686
Byte order: little
Frozen: False
#---- End System Information ----#
King
Library is successfully installed but here are few errors:
ctx = cairo.GraphicsContext.Create(mdc)
File "/usr/lib/python2.6/dist-packages/wx-2.8-gtk2-unicode/wx/lib/
graphics.py", line 915, in Create
ctx = wx.lib.wxcairo.ContextFromDC(dc)
File "/usr/lib/python2.6/dist-packages/wx-2.8-gtk2-unicode/wx/lib/
wxcairo.py", line 115, in ContextFromDC
drawable = voidp( dc.GetGdkDrawable() )
File "/usr/lib/python2.6/dist-packages/wx-2.8-gtk2-unicode/wx/lib/
wxcairo.py", line 71, in voidp
return ctypes.c_void_p(int(ptr))
TypeError: int() argument must be a string or a number, not 'NoneType'
another one:
(python:2115): Gdk-CRITICAL **: gdk_cairo_create: assertion
`GDK_IS_DRAWABLE (drawable)' failed.
Prashant
#####################################
Operating System: Linux 2.6.31-14-generic i686
Python Version: 2.6.4rc2 (r264rc2:75497, Oct 20 2009, 02:55:11)
[GCC 4.4.1]
wxPython Version: 2.8.10.1 (gtk2-unicode)
wxPython Info: (__WXGTK__, wxGTK, unicode, gtk2, wx-assertions-off,
SWIG-1.3.29)
Python Encoding: Default=UTF-8 File=UTF-8
wxPython Encoding: utf-8
System Architecture: 32bit i686
Byte order: little
Frozen: False
#####################################
King
File "/usr/lib/python2.6/dist-packages/wx-2.8-gtk2-unicode/wx/lib/
graphics.py", line 1152, in SetFont
font = GraphicsFont.CreateFromFont(font, colour)
File "/usr/lib/python2.6/dist-packages/wx-2.8-gtk2-unicode/wx/lib/
graphics.py", line 413, in CreateFromFont
f._fontface = wx.lib.wxcairo.FontFaceFromFont(font)
File "/usr/lib/python2.6/dist-packages/wx-2.8-gtk2-unicode/wx/lib/
wxcairo.py", line 164, in FontFaceFromFont
fontface =
pycairoAPI.FontFace_FromFontFace(ctypes.c_void_p(fontfaceptr))
cairo.Error: <unknown error status>
python: /build/buildd/cairo-1.8.8/src/cairo-font-face.c:191:
cairo_font_face_destroy: Assertion `((*&(&font_face->ref_count)-
>ref_count) > 0)' failed.
Aborted
Prashant
Robin Dunn
It seems to be working okay here with my tests. There have been a few
changes recently with the GTK specific parts of the code in wxcairo.py,
you may want to try getting the latest version from SVN. If that
doesn't help then send us a sample that shows the problem.
King
I tried the new wxcairo.py from svn.
Problem 1.
The function "_findCairoLib" in *NEW* wxcairo is not able to find
cairo libs and raising an error.
I have replaced "_findCairoLib" function from *OLD* library into *NEW*
one. At least now there is no missing library error.
Application is getting crashed raising an error:
Just to look at:
python: /build/buildd/cairo-1.8.8/src/cairo.c:87: _cairo_error:
Assertion `(status != CAIRO_STATUS_SUCCESS && status <=
CAIRO_STATUS_INVALID_WEIGHT)' failed.
Aborted
I am not getting anything else and it's difficult to create a sample
app to reproduce the problem.
Right now I am investigating more and get back to you ASAP.
Thanks
Prashant
King
import wx
import wx.lib.graphics as Cairo
import wx.lib.wxcairo as wxcairo
class DemoApp(wx.App):
def OnInit(self):
wx.InitAllImageHandlers() # called so a PNG can be saved
font = wx.SystemSettings.GetFont(wx.SYS_DEFAULT_GUI_FONT)
font.SetPointSize(12)
# Render a bitmap using MemoryDC.
width, height = 100, 100
size = width, height
colorBitmap = wx.EmptyBitmapRGBA(size[0]+1, size[1]+1)#, 0, 0,
0, 0)
# Prepare the bitmap using cairo & cairo image surface
surface = wxcairo.ImageSurfaceFromBitmap(colorBitmap)
ctx = Cairo.GraphicsContext.CreateFromSurface(surface)
# Imagine this as a onDraw/onPaint function where you are
continuously setting
# different fonts and drawing texts using it.
ctx.SetFont(font, "blue")
ctx.SetFont(font, "blue")
ctx.SetFont(font, "blue")
ctx.SetFont(font, "blue")
ctx.SetFont(font, "blue")
ctx.DrawText("wxPython Rocks!!!", 0, 45)
ctx.SetBrush(wx.Brush("red"))
ctx.DrawRectangle(10,10,25,25)
# Save file
colorBitmap.SaveFile("text.png", wx.BITMAP_TYPE_PNG)
return True
if __name__ == "__main__":
print "about to initialize the app"
app = DemoApp(0)
app.MainLoop()
Error:
python: /build/buildd/cairo-1.8.8/src/cairo-font-face.c:191:
cairo_font_face_destroy: Assertion `((*&(&font_face->ref_count)-
>ref_count) > 0)' failed.
Aborted
Prashant
Robin Dunn
> I would try to post a sample app ASAP.
>
> I tried the new wxcairo.py from svn.
>
> Problem 1.
>
> The function "_findCairoLib" in *NEW* wxcairo is not able to find
> cairo libs and raising an error.
>
> I have replaced "_findCairoLib" function from *OLD* library into *NEW*
> one. At least now there is no missing library error.
Sorry I forgot to mention that change, see
http://trac.wxwidgets.org/ticket/11673. I'm working on a fix that will
still solve the problem the patch was intended to fix, but also fall
back to the old way in the other cases.
Ok, that's done and the crashing bug is fixed too. The refcount on the
fontface object needed to be incremented.
http://trac.wxwidgets.org/changeset/63469
King
dc.SetFont(self.boldFont, wx.BLACK)
File "/usr/lib/python2.6/dist-packages/wx-2.8-gtk2-unicode/wx/lib/
graphics.py", line 1156, in SetFont
self._font = GraphicsFont.CreateFromFont(font, colour)
File "/usr/lib/python2.6/dist-packages/wx-2.8-gtk2-unicode/wx/lib/
graphics.py", line 413, in CreateFromFont
f._fontface = wx.lib.wxcairo.FontFaceFromFont(font)
File "/usr/lib/python2.6/dist-packages/wx-2.8-gtk2-unicode/wx/lib/
wxcairo.py", line 173, in FontFaceFromFont
fontface = pycairoAPI.FontFace_FromFontFace(fontfaceptr)
cairo.Error: <unknown error status>
(python:2528): Gdk-CRITICAL **: gdk_draw_drawable: assertion
`GDK_IS_DRAWABLE (drawable)' failed
Prashant
Robin Dunn
What is the situation?