* Guile/Cairo, files formats/surfaces
@ 2015-08-02 8:17 Tomas By
2015-08-05 8:32 ` Amirouche Boubekki
0 siblings, 1 reply; 4+ messages in thread
From: Tomas By @ 2015-08-02 8:17 UTC (permalink / raw)
To: guile-user; +Cc: wingo
Hi all,
(Am following instructions on http://www.nongnu.org/guile-cairo/dev/)
I'm trying to create EPS files using guile-cairo, but have some
problems. Am using version 1.14.2, the latest in Ubuntu.
scheme@(guile-user)> (cairo-version-string)
$1 = "1.14.2"
According to the web documentation at
http://www.nongnu.org/guile-cairo/docs/html/PostScript-Surfaces.html#PostScript-Surfaces
there should be a procedure `cairo-ps-surface-set-eps' to make the
Postscript surface produce EPS, but this procedure is not defined:
scheme@(guile-user)> cairo-ps-surface-set-eps
;;; <unknown-location>: warning: possibly unbound variable
`cairo-ps-surface-set-eps'
(It is not listed in /usr/share/guile/site/cairo/cairo-procedures.txt
either, whatever that may mean.)
Also, the `recording' surface does not seem to be included in
guile-cairo. Is there some reason for this? (other than lack of
time/round tuits)
Finally, I am using SVG surfaces to make images which I then draw on PS
surfaces and include in a Latex document. What surprises me is that the
final pictures seem to be pixellated, not vector drawings. I am only
using some simple Cairo commands (move to, line to, arc) to create the
images. It seems to me that since SVG & PS/EPS are all vector formats
there should not be any pixellation at all?
Grateful for any help in explaining this.
/Tomas
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Guile/Cairo, files formats/surfaces
2015-08-02 8:17 Guile/Cairo, files formats/surfaces Tomas By
@ 2015-08-05 8:32 ` Amirouche Boubekki
2015-08-05 8:50 ` Tomas By
0 siblings, 1 reply; 4+ messages in thread
From: Amirouche Boubekki @ 2015-08-05 8:32 UTC (permalink / raw)
To: Tomas By; +Cc: wingo, guile-user, guile-user-bounces+amirouche=hypermove.net
Le 2015-08-02 10:17, Tomas By a écrit :
> Hi all,
>
> (Am following instructions on http://www.nongnu.org/guile-cairo/dev/)
>
> I'm trying to create EPS files using guile-cairo, but have some
> problems.
Can you share a small snippet that works for images? I'd like to output
a pdf, but I can't.
Thanks.
> Am using version 1.14.2, the latest in Ubuntu.
>
> scheme@(guile-user)> (cairo-version-string)
> $1 = "1.14.2"
>
> According to the web documentation at
> http://www.nongnu.org/guile-cairo/docs/html/PostScript-Surfaces.html#PostScript-Surfaces
> there should be a procedure `cairo-ps-surface-set-eps' to make the
> Postscript surface produce EPS, but this procedure is not defined:
>
> scheme@(guile-user)> cairo-ps-surface-set-eps
> ;;; <unknown-location>: warning: possibly unbound variable
> `cairo-ps-surface-set-eps'
>
> (It is not listed in /usr/share/guile/site/cairo/cairo-procedures.txt
> either, whatever that may mean.)
>
> Also, the `recording' surface does not seem to be included in
> guile-cairo. Is there some reason for this? (other than lack of
> time/round tuits)
>
> Finally, I am using SVG surfaces to make images which I then draw on
> PS surfaces and include in a Latex document. What surprises me is that
> the final pictures seem to be pixellated, not vector drawings. I am
> only using some simple Cairo commands (move to, line to, arc) to
> create the images. It seems to me that since SVG & PS/EPS are all
> vector formats there should not be any pixellation at all?
>
> Grateful for any help in explaining this.
>
> /Tomas
--
Amirouche ~ amz3 ~ http://www.hyperdev.fr
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Guile/Cairo, files formats/surfaces
2015-08-05 8:32 ` Amirouche Boubekki
@ 2015-08-05 8:50 ` Tomas By
2015-08-05 9:05 ` Amirouche Boubekki
0 siblings, 1 reply; 4+ messages in thread
From: Tomas By @ 2015-08-05 8:50 UTC (permalink / raw)
To: Amirouche Boubekki
Cc: wingo, guile-user, guile-user-bounces+amirouche=hypermove.net
Hi,
On 2015-08-05 10:32, Amirouche Boubekki wrote:
> Can you share a small snippet that works for images? I'd like to
> output a pdf, but I can't.
Not sure what you are having problems with, but this produces a PDF:
(define (pdf-file)
(let* ((sf (cairo-pdf-surface-create 842 595 "test.pdf"))
(cr (cairo-create sf)))
(let ((pi (* 2 (acos 0))))
(cairo-set-line-width cr 10)
(cairo-arc cr 400 300 20 0 (* 2 pi))
(cairo-stroke cr)
(cairo-surface-finish sf))))
/Tomas
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Guile/Cairo, files formats/surfaces
2015-08-05 8:50 ` Tomas By
@ 2015-08-05 9:05 ` Amirouche Boubekki
0 siblings, 0 replies; 4+ messages in thread
From: Amirouche Boubekki @ 2015-08-05 9:05 UTC (permalink / raw)
To: Tomas By; +Cc: wingo, guile-user, guile-user-bounces+amirouche=hypermove.net
Le 2015-08-05 10:50, Tomas By a écrit :
> Hi,
>
> On 2015-08-05 10:32, Amirouche Boubekki wrote:
>> Can you share a small snippet that works for images? I'd like to
>> output a pdf, but I can't.
>
> Not sure what you are having problems with, but this produces a PDF
>
Nothing in particular. I could not get the particular set of instruction
in the correct order.
Thanks.
^ permalink raw reply [flat|nested] 4+ messages in thread
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2015-08-02 8:17 Guile/Cairo, files formats/surfaces Tomas By
2015-08-05 8:32 ` Amirouche Boubekki
2015-08-05 8:50 ` Tomas By
2015-08-05 9:05 ` Amirouche Boubekki
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