Saving the image of what the device context painted, wxPython

Question

I need to be able to save an image (the format doesn't matter) the status of the device context canvas. I tried dc.GetAsBitmap , but it returns invalid raster images. How can i do this?

Answer 1

I believe this should do the trick:

 def saveSnapshot(dcSource): # based largely on code posted to wxpython-users by Andrea Gavana 2006-11-08 size = dcSource.Size # Create a Bitmap that will later on hold the screenshot image # Note that the Bitmap must have a size big enough to hold the screenshot # -1 means using the current default colour depth bmp = wx.EmptyBitmap(size.width, size.height) # Create a memory DC that will be used for actually taking the screenshot memDC = wx.MemoryDC() # Tell the memory DC to use our Bitmap # all drawing action on the memory DC will go to the Bitmap now memDC.SelectObject(bmp) # Blit (in this case copy) the actual screen on the memory DC # and thus the Bitmap memDC.Blit( 0, # Copy to this X coordinate 0, # Copy to this Y coordinate size.width, # Copy this width size.height, # Copy this height dcSource, # From where do we copy? 0, # What the X offset in the original DC? 0 # What the Y offset in the original DC? ) # Select the Bitmap out of the memory DC by selecting a new # uninitialized Bitmap memDC.SelectObject(wx.NullBitmap) img = bmp.ConvertToImage() img.SaveFile('saved.png', wx.BITMAP_TYPE_PNG) 

(I would include a link to the original, but could not find it quickly.)

Answer 2

Perhaps, perhaps, something from this (working with images and wxPython)