gmane.lisp.cl-pdf.devel

gradients

Tamas K Papp — 2012-04-18T08:17:32

Hi,

I would like to write a plotting function that draws image plots
(plotting a matrix in 2d using colors).  It would be useful to use
gradients; in particular, paint a rectangle where the four corners each
have a color and the each point in the rectangle has a color which is a
convex combination of the corner colors.  I think this is called a
gradient in most libraries, but I could not figure out how to do it in
cl-pdf (I have to admit that I didn't find gradients in the library,
maybe I didn't look hard enough).  Suggestions/examples would be
welcome.

Best,

Tamas

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embedding PDF

Tamas Papp — 2012-02-12T11:04:26

Hi,

Is it possible to embed another PDF file (ie render it contents at a
particular coordinate) in a document generated by CL-PDF?

Thanks,

Tamas

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Need help with layout

2012-01-18T18:28:33

I'm having some issues getting my layout working, and I'm running out of
time, so if anyone can help, I'd appreciate it.

How can I have a line of text, a user drawn box, and another line of text,
with the text lined up pretty much with the center of the box?  I have a
100 point high user draw box, so I need label text on the left and right
about 50 points from the top or bottom of the box.

Can anyone help?


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Text to left and right of user drawn box

2012-01-18T18:12:04

I'm drawing a chart that needs text to the left and the right.  However,
I'm not sure which text methods are correct within the context of
WITH-DOCUMENT to place text where I need them to go.  Using the regular
CL-PDF methods causes an error, because *page* is not set.



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Adding arrow heads to lines

2012-01-17T12:46:20

Is there a way to add arrow heads without trying to rotate and draw them
manuall?


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Importing Cambria font

2012-01-17T12:48:03

I'm running SBCL on OS X.  How could I import a Cambria font for use in PDFs?


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Multicolor text in paragraph

2012-01-15T14:08:58

Can PARAGRAPH be used to show different styles/colors of text in the same
line?



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Understanding text layout functions

2012-01-11T23:37:22

I'm trying to draw a title page, with some colored bars and images, and
text as well.

What is the purpose of in-text-mode and draw-text versus the paragraph
function?

Why do some strings appear correctly in the pdf when they are in a
paragraph, but others need to be inserted with format-string?

I have more questions, but I'll start with these.


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Bullet points

2011-12-29T01:22:45

Hi all,

I'm back on a major project using cl-pdf.  I need to generate bullet
points in a table display.  I've been experimenting with UTF-8 encoding in
other areas, but not cl-pdf.  What's the trick to displaying them?



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Conversion of TrueType fonts to afm for use by CL-PDF

Mitch Berkson — 2011-11-15T18:11:12

I have tried two ways to convert my Garamond TrueType font to .afm.  The 
first was using the font converter at http://fpdf.fruit-lab.de/. The 
second was using Dimitriy's converter ttf2pt1.

When viewing a pdf document created using the Garamond.afm font produced 
by either of these, Adobe reader says "The font 'Garamond' contains a 
bad /BBox." and the text looks bad.

Is there a better way to get .afm files for CL-PDF?  Thanks for any help.

Mitch Berkson

I doubt if this is an issue, but to generate the pdf, I am using:

(defun font-test (&optional (file (merge-pathnames  "font-test.pdf" *dir*)))
   (pdf:with-document ()
     (pdf:with-page ()
       (let ((font-names '("Helvetica" "Times-Roman" "Garamond"))
             (text-str "Lorem ipsum dolor sit amet, consectetur 
adipiscing elit. Nam elit metus,
consequat ac posuere eu, rutrum sit amet nisi. Suspendisse potenti. In 
consequat, massa sit amet
eleifend pharetra, ligula nisl posuere elit, aliquam sagittis nibh magna 
eget justo. Maecenas
justo risu

Some problems with pdf-parser

Piotr Chamera — 2011-06-10T16:48:25

Hi,
I just started with cl-pdf and it works great for me :)
but I found some problems in pdf-parser and need advice
how to fix it. I am rather novice Lisper so I can be wrong
in my guesses below...


1. In file cl-pdf, function find-cross-reference-start

function searches for 'startxref' in buffer _from beginning_
and can find incorrect place if at end of file (in buffer)
are two such sections (eg small incremental change at end of file).

Proposition: change

     (let ((position (search "startxref" buffer)))

to

     (let ((position (search "startxref" buffer :from-end t)))



2. In file cl-pdf, function make-indirect-object:

(defun make-indirect-object (obj-number gen-number position)
   (let ((object (or (car (gethash (cons obj-number gen-number) 
*indirect-objects*))
    (make-instance 'indirect-object
   :obj-number obj-number
   :gen-number gen-number
   :content :unread
   :no-link t))))
     (setf (gethash (cons obj-number gen-number) *indirect-objects*) 
(cons object position))

source file character encodings

Attila Lendvai — 2011-03-08T00:24:48

hi!

in file cl-pdf/pdf-geom.lisp there are utf-8 non-readable characters
in ;-comments at position 261, 6541, 6562.

eventually i'll commit utf-8 version of the first one (name of the
contributor Eduardo Muñoz), and replace the other two with ASCII
letters (a spanish comment).

if you would like to eliminate all the three, or would like to keep
things as they are, then speak up!

i may or may not have lost my commit password, so if someone wants to
be proactive in this, then i'd be happy to hand over the task. just
please make sure that the files are readable with utf-8 encoding.

PNG Support Patches

Cyrus Harmon — 2011-02-26T15:52:07

I seem to recall some discussion of this a few years back, and there is some support for PNG images in cl-pdf, but there is currently no way to embed a PNG document in a cl-typesetting document. The following patches provide support for PNG images in cl-typesetting. Any chance of seeing this (or similar code) accepted into the repository?

Thanks,

Cyrus



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make-template-from-page crash

Mitch Berkson — 2010-11-10T17:37:15

I have a pdf file which contains three elements. I can create a pdf from 
each of the elements separately using test-template.

When I try the file containing all of them, I get the error: "Error: No 
applicable methods for #<STANDARD-GENERIC-FUNCTION PDF::CONTENT 
220588BA> with args (#(#<PDF::INDIRECT-OBJECT 31D9507B> 
#<PDF::INDIRECT-OBJECT 31D94FA3> #<PDF::INDIRECT-OBJECT 31D94DF3> 
#<PDF::INDIRECT-OBJECT 31D94C43> #<PDF::INDIRECT-OBJECT 31D94A93> 
#<PDF::INDIRECT-OBJECT 31D949BB> #<PDF::INDIRECT-OBJECT 31D9480B> 
#<PDF::INDIRECT-OBJECT 31D94733>))"

My guess is that it has to do with the nesting of pdf objects. I can do 
what I need by adding the separate pdfs to a page, but it would be nice 
if I could use just the one file. Is there a way to make my input pdf 
file differently so that it doesn't cause this error?

Mitch Berkson

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Error with ef-coded-character-set in LW6

Mitch Berkson — 2010-10-17T21:33:47

cl-pdf worked fine for me in LW 5. I upgraded to LW 6 and now the 
following line:

(ef::ef-coded-character-set win32:*multibyte-code-page-ef*)

in the .asd file gives the error:

Undefined operator EXTERNAL-FORMAT::EF-CODED-CHARACTER-SET in form 
(EXTERNAL-FORMAT::EF-CODED-CHARACTER-SET WIN32:*MULTIBYTE-CODE-PAGE-EF*).

My cl-pdf config.lisp file looks the same as it was in LW5. Thanks for 
any advice.

Mitch Berkson

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Error with ef-coded-character-set in LW6

Mitch Berkson — 2010-10-17T21:33:47

cl-pdf worked fine for me in LW 5. I upgraded to LW 6 and now the 
following line:

(ef::ef-coded-character-set win32:*multibyte-code-page-ef*)

in the .asd file gives the error:

Undefined operator EXTERNAL-FORMAT::EF-CODED-CHARACTER-SET in form 
(EXTERNAL-FORMAT::EF-CODED-CHARACTER-SET WIN32:*MULTIBYTE-CODE-PAGE-EF*).

My cl-pdf config.lisp file looks the same as it was in LW5. Thanks for 
any advice.

Mitch Berkson

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patch for unicode PDFs on clisp

Pixel // pinterface — 2010-05-01T02:07:18

There are three patches attached.

clisp-unicode.patch begins support for producing unicode PDFs on clisp.  It
is pretty uninteresting, other than making me wonder if cl-pdf should just
define an ascii-char-p function (or whatever an appropriate name for it
would be), instead of duplicating reader conditionals so many times.

clisp-encoding.patch limits the effects of setting *default-file-encoding*
to within cl-pdf itself, to avoid causing surprises for users with
alternately-encoded source files.  Or, copying from the patchfile itself:
;; Justification: *default-file-encoding* affects not only cl-pdf, but every
;; lisp file loaded or compiled after this, which causes encoding issues for
;; any bit of user code assuming the environment is set up for, e.g., utf-8.
;; cl-pdf should avoid changing defaults out from under its users if
possible.

clisp-encoding-2.patch does the same as clisp-encoding.patch, but for
cl-typesetting, with the justification that setting it in both cl-pdf and
cl-typesetting is redund

Better arglists for pdf:with-document, tt:paragraph,etc.

Pixel // pinterface — 2010-04-19T04:53:24

Do you find it difficult to use cl-pdf or cl-typesetting with limited &rest
lambda lists?  Do the autodoc hints in slime prove unhelpful?  Do you wish
you could type "(with-document " or "(paragraph " and get an accurate
listing of what arguments are available?  Do you use SBCL or Clisp?[1]

Then have I got the .asd for you!

Introducing cl-pdf.arglists: better arglists for cl-pdf and cl-typesetting
macros.
  http://web.kepibu.org/code/lisp/cl-pdf.arglists/

Turns
  (with-document (&rest args
                  &key (max-number-of-pages 'pdf:*max-number-of-pages*)
                  &allow-other-keys)
                 &body body)
into
  (with-document (&rest args
                  &key (max-number-of-pages 'pdf:*max-number-of-pages*)
                  empty mode layout (creator "") author title subject
                  keywords &allow-other-keys)
                 &body body)
and
 (paragraph (&rest style) &body body)
into
 (paragraph (&rest style
             &key font font-size text-x-scale color

PATCH: PDF transparency support

Eric Marsden — 2010-04-05T12:13:51

Hi,

The attached patch adds support for PDF transparency, using the existing
gstate mechanism. It allows you to specify transparency for stroke and
fill operations seperately. The "blend mode" can also be specified. The
patch includes an example.

Note that viewer support for different blend modes is variable (works OK
in Adobe Reader, Foxit Reader, xpdf but not in evince/poppler).

Font "helvetica" not found

Mitch Berkson — 2009-12-10T04:24:48

I have been using cl-pdf on one machine and am trying to compile it on a 
  new machine in a different directory.  When I do, I get the error 
"Error: Font 'helvetica' not found"

This is near the end of chart.lisp but I think the problem has to do 
with the path set in *cl-pdf-base-directory* or *afm-files-directories*. 
Is there something I need to configure? Thanks for any help.

Mitch Berkson

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gmane.lisp.cl-pdf.devel

gradients

embedding PDF

Need help with layout

Text to left and right of user drawn box

Adding arrow heads to lines

Importing Cambria font

Multicolor text in paragraph

More questions

Understanding text layout functions

Bullet points

Conversion of TrueType fonts to afm for use by CL-PDF

Some problems with pdf-parser

source file character encodings

PNG Support Patches

make-template-from-page crash

Error with ef-coded-character-set in LW6

Error with ef-coded-character-set in LW6

patch for unicode PDFs on clisp

Better arglists for pdf:with-document, tt:paragraph,etc.

PATCH: PDF transparency support

Font "helvetica" not found