[Guidolib-devel] Variations2 project

[Jerome B. <be...@gr...>]

At 16:57 05/05/2004, you wrote:

Hi,


>As I told you already Don Byrd (I hope you know him otherwise please have 
>a look: http://php.indiana.edu/~donbyrd/ )
>wants to use midi2gmn and gmn2gif for creating small gif files from 2500 
>MIDI files in context of the Variations2 project
>( http://variations2.indiana.edu/  ).
>
>I helped him with optimising/solving  some issues with creating score 
>.gif's  for small resolution display (i.e., I compiled him a special 
>gmn2gif version using blue instead of black staff lines.)

  I had excellent results with Gif export, by generating pictures at twice 
(or more) the target
resolution, say 1000x1000, then reduce it with graphic software to 500x500 
pixels with high
quality resampling (bilinear...). The result of this is a nice non-aliased 
music score, you can
even tune up the final result with a sharpen filter. You also avoid those 
kind of little but annoying
aligmenent imperfections.

  The shareware GraphicConverter (MacOs) is the perfect solution for this, 
it can convert and/or
modify thousand of files at once, and fast.

About gif export, the maximum size in the NoteViewer is now 3200x3200 
(instead of 1600x1600).


>It turned also out, that if avoiding the 5-staffline character for system 
>drawing (using single line symbold instead) the output quality in terms of 
>equal spaced stafflines is much better!
>It might be that the lines are not equally spaced in the font.

  In the current version of the library, Guido does not use a font 
character anymore to draw
the staff. It just draws n lines with a "pen". Both solutions have issues 
at small resolution,
but using above method (large images + downsampling) probably leads to 
acceptable results.


>Some issues could not be fixed right know (number of beams for strange 
>tuplets, etc.).
>
>After reading the changelog.txt of the GUIDOLib he'd like to ask/discuss 
>with you about plans, possibilities, etc. for improving the default 
>positioning of tuplet numbers and brackets.

  The new Windows GuidoViewer v0.92 has just been released today on 
sourceforge (main and
dev branches have been merged, mac version is planed for tomorrow), among 
other things,
automatic positioning of tuplet numbers and brackets has been implemented. 
We can now
discuss about their improvement. Of  course, all suggestions are welcome.

Regards,

Jerome