Re: [NTG-context] Support of PDF Optional Content Groups (Layers)
On Sun, 16 Nov 2014 15:29:20 Hans Hagen wrote:
On 11/16/2014 9:52 PM, Wolfgang Schuster wrote:
Am 16.11.2014 um 20:47 schrieb Christoph Reller
Hi,
Has ConTeXt any support for producing a PDF with "optional content groups" (OCGs)?
In Adobe's jargon OCGs are also known as "layers" (not to confuse with layers in ConTeXt). See Section "4.10.2 Making Graphical Content Optional" in the PDF Reference 1.7 available at
http://wwwimages.adobe.com/content/dam/Adobe/en/devnet/pdf/pdfs/pdf_referenc...
I cannot find anything on the Wiki nor in the ntg-context emails and grepping through the source code for "ocg" does not give reasonable results.
You have to look for \defineviewerlayer and \startviewerlayer.
A quick test if your pdf viewer supports is is:
\showlayoutcomponents
\starttext \input tufte \stoptext
Many thanks to all of you Hans, Wolfgang, and Pablo! \definelayer and \startviewerlayer is a nice interface to basic OCGs construction. Is there any way to construct "Set-OCG-State Actions" with ConTeXt? (See Section 8.5 Actions in the PDF Reference.) I admit that this is an advanced feature of PDF and that most viewers apart from the Adobe Reader are not capable of handling OCGs correctly. Kind Regards, Christoph
On 11/17/2014 11:51 AM, Christoph Reller wrote:
On Sun, 16 Nov 2014 15:29:20 Hans Hagen wrote:
On 11/16/2014 9:52 PM, Wolfgang Schuster wrote:
Am 16.11.2014 um 20:47 schrieb Christoph Reller
Hi,
Has ConTeXt any support for producing a PDF with "optional content groups" (OCGs)?
In Adobe's jargon OCGs are also known as "layers" (not to confuse
with
layers in ConTeXt). See Section "4.10.2 Making Graphical Content Optional" in the PDF Reference 1.7 available at
http://wwwimages.adobe.com/content/dam/Adobe/en/devnet/pdf/pdfs/pdf_referenc...
I cannot find anything on the Wiki nor in the ntg-context emails and grepping through the source code for "ocg" does not give reasonable results.
You have to look for \defineviewerlayer and \startviewerlayer.
A quick test if your pdf viewer supports is is:
\showlayoutcomponents
\starttext \input tufte \stoptext
Many thanks to all of you Hans, Wolfgang, and Pablo!
\definelayer and \startviewerlayer is a nice interface to basic OCGs construction.
Is there any way to construct "Set-OCG-State Actions" with ConTeXt? (See Section 8.5 Actions in the PDF Reference.) I admit that this is an advanced feature of PDF and that most viewers apart from the Adobe Reader are not capable of handling OCGs correctly.
I'm not sure what you mean but with the \goto command you can do a lot, including sequences of actions that enable/disable layers and so (often these things are done via javascript actions). Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------
participants (2)
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Christoph Reller -
Hans Hagen