[Lispweb] [Announce] CL-PDF 0.3 (The Common Lisp PDF Library)
marc.battyani at fractalconcept.com
Sat Feb 2 16:01:36 CST 2002
02 February 2002: Release 0.3
removed the use of keywords as PDF names
cleaned up the code, put back write-line, removed gensym, etc.
added a maze generation example
Here is what you get with the maze generation example:
(make-maze 53 80) gives the following pdf file
CL-PDF is a Common Lisp PDF Library for generating PDF files.
You will find it here:
It is released with a BSD style license so it's usable for commercial work.
It it how it looks:
(let ((helvetica (make-instance 'pdf:font)))
(pdf:set-font helvetica 36.0)
(pdf:move-text 100 800)
(pdf:draw-text "cl-pdf: Example 1"))
(pdf:translate 230 500)
(loop repeat 101
for i = 0.67 then (* i 1.045)
(pdf:set-font helvetica i)
(pdf:move-text (* i 3) 0)
=> gives this > http://www.fractalconcept.com/fcweb/download/ex1.pdf
Before writing it, I was rather impressed by the size of the PDF
documentation. After writing it I'm really impressed by Common Lisp. As you
will see, the library is quite small, yet really powerful.
So enjoy it and send me some great looking PDF files to put in a gallery on
the web site.
I also think that it's an opportunity to open several sub projects.
1) Finishing CL-PDF:
1.1- In CL-PDF I open the file for writing with a LW specific option to open
it with no CR/LF translation.
I would need the different versions of doing this on other implementation
running on Windows.
1.2-Compression : If someone would like to FLI the zlib compression, I could
integrate it to generate compressed PDF files. I can't do it alone as it has
to be done for several implementations to be useful.
2) Building utility layers on top of CL-PDF to turn it as a really powerful
drawing publication platform. I'm willing to coordinate and drive this
effort but I haven't the time to do it alone.
2.1-Basic Graphic primitives build on top of PDF : Arc, ellipse, round rect,
2.2- Higher level Graphic functions. ie Functions to draw : axis, lin/log
scales, barcodes etc.
(OK all this exists but it's not always very good and does not always do
what you want.)
2.3-Text layout functions (well not a full Tex but at least writing text in
a box for instance)
2.4-CL-TeX: Well here I'm kidding but not completely ;-)
3) CL-PDF Logo like layer for kids. I have teach Logo at a local school
where my sons go but I've found that Logo was great to start but a deceptive
one after a while. A CL-PDF Logo could lead to extremely good quality
drawings. I definitively think that's a way to explore.
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