Re: png cropping

[Jonathan Kulp]

Hi Patrick,

I've been running your script trying to use the command-line arguments, 
and something's happening with the format argument.  I specify it with 
an argument, but then I still get prompted for format.  I might not be 
doing the flag right.  I've tried it with -f=jpeg, -f=JPEG, -fJPEG, and 
I think that's it.  I'll copy the terminal output below so you can see. 
 On this example I use -fGIF and while it doesn't make the script fail, 
it does still ask me for a format.  Am I specifying the format wrong?

BTW, in the script I attached to the last email, you'll notice that with 
transparent background you have a choice between either png or gif--it's 
not forced to png.  Is there a way to work this option into your version?

Jon

address@hidden:~/Documents/Composition/Guitar$ lilytoimage 
dc1-passage.ly -r=300 -fGIF
Resolution set to 300 dots per inch.
Transparency? y/N  n
Enter desired output format (jpeg, png, tiff, gif, pcx, bmp):  gif
GNU LilyPond 2.11.59
Processing `dc1-passage.ly'
Parsing...
Interpreting music...
Preprocessing graphical objects...
Interpreting music...
MIDI output to `dc1-passage.midi'...
Finding the ideal number of pages...
Fitting music on 1 page...
Drawing systems...
Layout output to `dc1-passage.ps'...
Converting to PNG...
ppmtogif: computing colormap...
ppmtogif: 79 colors found
address@hidden:~/Documents/Composition/Guitar$


Patrick Horgan wrote:
> Jonathan Kulp wrote:

> I'm attaching a new version of my version of your script with that change and a 
> new routine, getval,  that validates input, you use it like:
>
>  prompt= "Enter desired output format (jpeg, png, tiff, gif, pcx, bmp): "
>
>  goodvals=("jpeg" "png" "tiff" "gif" "pcx" "bmp")
>
>  getval
>
>  FORMAT=$outval
>
>
> If the user enters something that's not on the goodvals list, for example joe, 
> it reprompts them after telling them what they might have entered:
>
> Enter desired output format (jpeg, png, tiff, gif, pcx, bmp):  joe
>
> Expecting one of : jpeg  png  tiff  gif  pcx  bmp  
>
> Enter desired output format (jpeg, png, tiff, gif, pcx, bmp):  
>
>  Cool, no?  I suppose I should add validation to the command line arguments as 
> well.
> Ok, just did that, resolution checked for numeric both on input and from the 
> command line, format checked for one of the allowable things, and check to make 
> sure there's a filename, and print meaningful error message and a usage 
> statement.  Try it and see if it works for you.
--
Jonathan Kulp
http://www.jonathankulp.com