September 2005 - ntg-pdftex - NTG Mailing Lists

Re: [NTG-pdftex] pdfpagebox
by Thanh Han The 19 Sep '05

19 Sep '05

good. I am on way to do that. Another issue is that I am implementing a primitive requrested by Cho, to grab the BBox of an included pdf. Syntax: \pdfximagebbox\pdflastximage 1 => print BBox1 ... \pdfximagebbox\pdflastximage 4 => print BBox4 A question here: what should be printed? something like 10pt, or 10sp, or 10bp, or just 10? 10pt seems to be easy and also consistent with syntax of similar primitives, however the BBox of pdf is often in bp, so instead of 10bp we would get 10.03749pt. Is this a problem? Thanh On Thu, Sep 15, 2005 at 11:52:03AM +0200, Pawel Jackowski wrote: > Hi, > > >>at the moment \pdfforcepagebox overrides the setting given > >>by \pdfximage. Isn't this a little bit unlogical that the global > >>setting overrides the setting in individual use of > >>\pdfximage? > > indeed. > > >>I suggest to change \pdfforcepagebox to \pdfpagebox as a > >>global variable indicating which pagebox shoud be used in case > >>no pagebox specification is given with a \pdfximage. > >>used. > >> > >> > >makes sense > > good idea. > -- > Pawe/l Jackowski > P.Jackowski(a)gust.org.pl

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pdfpagebox
by Thanh Han The 19 Sep '05

19 Sep '05

Hi, at the moment \pdfforcepagebox overrides the setting given by \pdfximage. Isn't this a little bit unlogical that the global setting overrides the setting in individual use of \pdfximage? I suggest to change \pdfforcepagebox to \pdfpagebox as a global variable indicating which pagebox shoud be used in case no pagebox specification is given with a \pdfximage. used. Thanh

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useless error message
by Reinhard Kotucha 18 Sep '05

18 Sep '05

Hi, I have a few problems with tex4ht. I don't know much about it so I depend on the error messages I get. I'm using This is pdfeTeXk, Version 3.141592-1.30.3-2.2 (Web2C 7.5.5) That's what I got: __________________________________________________________________ (/ext/TL-src/Master/texmf-vntex/tex/latex/vntex/t5cmr.fd) ! pdfTeX error (\pdfobj): used while \pdfoutput is not set. reserved@a ->immediate pdfobj stream file {reserved@f }expandafter xdef csna... l.100 \fontencoding\encodingdefault\selectfont __________________________________________________________________ What does "\pdfoutput is not set" want to tell me? Is it undefined? Though tex4ht is based on latex, (which is in fact pdfelatex) any .tex file can contain something like \let\pdfoutput\undefined. Or does it mean that it is set to 0? Anyway, the message is useless and should either be ! pdfTeX error (\pdfobj): used while \pdfoutput is undefined. or ! pdfTeX error (\pdfobj): used while \pdfoutput=<value>. Regards, Reinhard -- ---------------------------------------------------------------------------- Reinhard Kotucha Phone: +49-511-4592165 Marschnerstr. 25 D-30167 Hannover mailto:reinhard.kotucha@web.de ---------------------------------------------------------------------------- Microsoft isn't the answer. Microsoft is the question, and the answer is NO. ----------------------------------------------------------------------------

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Re: [NTG-pdftex] useless error message
by Thanh Han The 18 Sep '05

18 Sep '05

On Sun, Sep 18, 2005 at 10:38:57AM +0200, Hartmut Henkel wrote: > On Sun, 18 Sep 2005, Reinhard Kotucha wrote: > > > Anyway, the message is useless and should either be > > > > ! pdfTeX error (\pdfobj): used while \pdfoutput is undefined. > > > > or > > > > ! pdfTeX error (\pdfobj): used while \pdfoutput=<value>. > > or maybe: > > ! pdfTeX error (\pdfobj): not allowed in DVI mode (\pdfoutput<=0). this sounds good. I will change it as Hartmut suggested. Thanh

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Re: [NTG-pdftex] pdfpagebox
by Thanh Han The 16 Sep '05

16 Sep '05

On Fri, Sep 16, 2005 at 02:03:12AM +0200, Heiko Oberdiek wrote: > > [...] > > Thus normalization is a good idea. good, let's do so. Thanh

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Re: [NTG-pdftex] pdfpagebox
by Thanh Han The 15 Sep '05

15 Sep '05

On Thu, Sep 15, 2005 at 02:57:59PM +0200, Heiko Oberdiek wrote: > Hello, > > On Thu, Sep 15, 2005 at 04:31:18AM -0700, Thanh Han The wrote: > > > Another issue is that I am implementing a primitive > > requrested by Cho, to grab the BBox of an included pdf. > > What's the purpose? The knowledge of width and height is > important (graphicx, pdfpages, ...). By putting \pdfximage > into a box these values are easily available (see pdftex.def). > I would be interested, in which case the exact offset must > be known. to be honest I don't know either -- because I don't use dvipdfm(x). Just trying to satisfy a request by Cho. > Next issues: > * I assume the box (media, crop, ...) is choosen by > the previous \pdfximage? yes exactly > * What is "1" until "4"? > * It is the first until fourth component > of the box retangle, given in the pdf file? they are the values as returned by xpdf -- page->{x1, y1, x2, y2}. I don't know whether xpdf does normalize them, but I hope so. > * The pdf spec says that the box typically has the form: > [ ll_x ll_y ur_x ur_y ] > (PDF spec for 1.6, section "3.8.4 Rectangle") > But there is a note that says that any two diagonally > opposite corners are acceptable and that applications that > process PDF should be prepared to normalize such rectangles. > The question is now, does pdfTeX normalize the rectangle? > This has the advantage that the numbers "1" until "4" also > have the symbolic meaning "ll_x" until "ur_y". Regards, Thanh

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Re: [NTG-pdftex] pdfpagebox
by Thanh Han The 15 Sep '05

15 Sep '05

or perhaps \pdfximagebox or \pdfximagepagebox? Thanh On Thu, Sep 15, 2005 at 08:39:48PM +0200, Pawel Jackowski wrote: > One afterthought. I'd strongly opt for \pdfimagebox instead of > \pdfpagebox. It suits already used naming convention (\pdfimagegamma, > \pdfimagehicolor etc.)... And if someday one will want to implement > > \pdfpageboxwidth3=200mm > \pdfpageboxheight3=280mm > > to set TrimBox of the page being typeset, \pdfpagebox prefix would be > the most suitable %) > > Regards > -- > Pawe/l Jackowski > P.Jackowski(a)gust.org.pl > _______________________________________________ > ntg-pdftex mailing list > ntg-pdftex(a)ntg.nl > http://www.ntg.nl/mailman/listinfo/ntg-pdftex

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\pdfximagebbox
by Thanh Han The 15 Sep '05

15 Sep '05

Hi, I added a new primitive to fetch the BBox of a pdf image. sources and djgpp binaries updated at pdftex.sarovar.org Thanh >From README: [...] - extensions for pdf inclusion: - added \pdfpagebox as the default setting for pagebox specification. Value specified to individual use of \pdfximage will override this setting. When set to 0 CropBox will be used as default. Example: ,-------- | \pdfpagebox=1 % use MediaBox as default | \pdfximage {f.pdf} % use MediaBox | \pdfximage cropbox {f2.pdf} % use CropBox `-------- - added \pdfximagebbox to fetch the BBox of a pdf image. The BBox is taken from the pagebox associated with the image. Example: ,-------- | \pdfximage {f.pdf} % CropBox will be use by default | \dimen1=\pdfximagebbox\pdflastximage 1 % fetch x1 from CropBox | \dimen2=\pdfximagebbox\pdflastximage 2 % fetch y1 from CropBox | \dimen3=\pdfximagebbox\pdflastximage 3 % fetch x2 from CropBox | \dimen4=\pdfximagebbox\pdflastximage 4 % fetch y2 from CropBox `--------

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Re: chofs wishes
by Thanh Han The 14 Sep '05

14 Sep '05

Hi, I am looking at what Hans was talking about. Before doing any changes, I would like to ask for explanation of a few things, as pdf inclusion is the speciality of Martin. - we have \pdfforcepagebox (\or pdfoptionalwaysusepdfpagebox) to force the pagebox being use, which can be: (1) media box, (2) crop box, (3) bleed box, (4) trim box, and (5) artbox. - then when a pdf image is included, one can say: mediabox|cropbox|bleedbox|trimbox|artbox to specify the box being used. The corresponding value are @!pdf_pdf_box_spec_media = 0; @!pdf_pdf_box_spec_crop = 1; @!pdf_pdf_box_spec_bleed = 2; @!pdf_pdf_box_spec_trim = 3; @!pdf_pdf_box_spec_art = 4; There are 2 points that might be need re-consideration: 1) to use \pdfforcepagebox one has to say the correct number, which is not that comfortable 2) there is some inconsistency in those above definitions, which requires more work to handle them in pdftoepdf.cc Any idea what can be done here? Thanh On Mon, Sep 12, 2005 at 05:15:38PM +0200, Hans Hagen wrote: > > [...] > > choff had another wish: the ability to determine the size of a graphic, > so we need something: > > \pdfcheckimage [artbox|bleedbox|...] {filename} > > that returns the llx etc in > > \pdfimagebbox == llx lly urx ury > > (or \pdfimagellx \pdfimagelly etc) > > That way pdftex can be used (in dvi mode) with dvipdfmx image inclusion. > > Hans > > ----------------------------------------------------------------- > Hans Hagen | PRAGMA ADE > Ridderstraat 27 | 8061 GH Hasselt | The Netherlands > tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com > | www.pragma-pod.nl > ----------------------------------------------------------------- >

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new pdftex extensions
by Thanh Han The 14 Sep '05

14 Sep '05

Hi, I uploaded a patch for various new extensions to pdftex to pdftex.sarovar.org/src Support for extensions for paragraph formatting is already included in the beta version of microtype. Many thanks to Robert. Thanh >From README: This is a patch for various extensions to pdftex. How to apply: ~~~~~~~~~~~~~ ,-------- | - this patch applies to the pristine pdftex-1.30.3 sources only; if you have | applied another patch(es) to the sources, please discard them and start from | the fresh ones. | | - how to apply: | | cd /path/to/pdftex-1.30.0-srcdir/src | zcat /path/to/the/gzipped/patch | patch -p1 | ./configure | cd texk/web2c | make pdfetex | | If you want to be careful, try patch with the option '--dry-run' | first to see whether the patch can be applied wihout problems. `-------- Included extensions: ~~~~~~~~~~~~~~~~~~~~ - \pdfinsertht: return the height of an insert; this primitive has similar syntax to \pdftexrevision. Example: ,-------- | \dimen0=\pdfinsertht\footins `-------- - snapping: support for grid typesetting. New primitives: - \pdfsnaprefpoint: insert a whatsit node representing a reference point - \pdfsnapy: insert a whatsit node that cause the position of the ``drawing pen'' to be moved onto a grid. This happens only during shipping phase. Example: after a display math it is difficult to get the next line to be on the grid. With snapping it might look like following: ,-------- | <text before displayed math> | $$ <some math> $$ | \vadjust pre{\pdfsnapy \snapunit plus .8\snapunit minus .2\snapunit} | <text after displayed math> `-------- \snapunit is a dimen, typically it would be \baselineskip. To make it work, there is one thing more: \pdfsnaprefpoint must be inserted into each page, typically in header. Let's call the y-position of this whatsit node Y1. The above example says roughly this: when pdftex reachs the \pdfsnapy node, it can move the drawing pen up and down in range (-.2\snapunit,.8\snapunit) to snap to a point with y-position Y2 so that (Y2-Y1) is a multiple of \snapunit. The \pdfsnapy node must be inserted before the text line following the displayed math, so we use \vadjust pre{...} to insert it (\vajdust with "pre" is an extension of pdftex). - \pdfsnapycomp: insert a whatsit node for snapping compensation The problem with the previous example is that sometimes the space after math is changed too much, while the space before math remains unchanged. Hence the result may look ugly, because the spaces around the math are not proportional. So it is better that the movement after math is somehow compensated into the space before math too. \pdfsnapycomp is for this purpose. The previous example with \pdfsnapycomp will look like: ,-------- | <text before displayed math> | \vadjust{\pdfsnapycomp 500} | $$ <some math> $$ | \vadjust pre{\pdfsnapy \snapunit plus .8\snapunit minus .2\snapunit} | <text after displayed math> `-------- So the skip at \pdfsnapy will be distributed to 50% at \pdfcompsnap and 50% at \pdfsnapy. - some extensions for paragraph formatting: - \pdfadjustinterwordglue: enable adjustment of interword glue - \knbscode -- kern before space code. Syntax is similar to \rpcode. Example: ,-------- | \pdfadjustinterwordglue=1 | \knsbcode\font`\.=200 | <some text> `-------- means that after each period, the interword glue will be increased by an amount of .2em. - \stbscode -- stretch before space code \shbscode -- shrink before space code Similar to \knbscode but apply to the stretch and shrink component of the interword glue. - \pdfprependkern -- enable auto-prepending kern before a char - \knbccode -- kern before char code. Syntax is similar to \rpcode. This is mainly intended for typesetting languagues like French or German where a small kern is required before certain punctuations, eg : ; ? Example: ,-------- | \pdfprependkern=1 | \knbccode\font`\:=200 | <some text> `-------- would cause that a kern of .2em will be prepended before each colon - \pdfappendkern -- enable auto-appending kern after a char - \knaccode -- kern after char code. Syntax is similar to \rpcode. Example: ,-------- | \pdfappendkern=1 | \knaccode\font`\:=200 | <some text> `-------- would cause that a kern of .2em will be append after each colon. Possible usage (from a mail from Robert Schlicht): ,-------- | French typography requires (among other things) guillemets to be | typeset as: | | \guillemotleft\kern0.8em word\kern0.8em\guillemotright `-------- Another application is letterspacing -- a very rough example would look like following: ,-------- | \pdfappendkern=1 | \pdfprependkern=1 | \newcount\n | \n=0 | \loop | \knbccode\font\n=50 | \knaccode\font\n=50 | \advance\n 1 | \ifnum \n < 256 \repeat | | A father had two sons, of whom the eldest was clever | and bright, and always knew what he was about; but the | youngest was stupid, and couldn't learn or understand | ... `-------- - support for subfonts: allow to have a single map entry for each set of subfonts. Example: ,-------- | cyberbit@Unicode@ <cyberbit.ttf PidEid=3,1 `-------- would cause pdftex to read Unicode.sfd to create all needed map entries for subfonts of cyberbit, and when embedding those subfonts pdftex will use the following mappings: 8-bit char in tfm ==> 16-bit charcode in Unicode.sfd ==> glyph in cyberbit.ttf using cmap with PidEid=3,1 The subfont TFM's however must be created manually.

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