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Laubender
Laubender
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[DPS v22 CS5.5 CV v10] Rounding error with folio size

Aug 10, 2012 9:39 AM

Tags: #cs5.5 #digital_publishing_suite #document_size_2048x1536 #folio_size_1024x768

Hi all,

while testing a possible bug with "SHIFTING" MSO contents (no problems in CS5.5 so far I can tell), I ran into another bug, I think wellknown, in building 2048 x 1536px InDesign CS5.5 files with a folio size of 1024 x 768 px output for iPad 2 and 3.

 

Confifuration:

 

InDesign CS5.5 v7.5.3 Build 333

OSX 10.6.8

 

Tested in Adobe Content Viewer on the iPad3

(via USB cable attached)

 

The ACV on the iPad is the one that came along with DPS v20.

 

Adobe DPS version:

plug-in version

7.5.5.20

 

folio format version

2.0.0

 

plist version

1.3.0

 

ExtensionBundleVersion

12.3.1.20120730_m_695362

 

****

Folio size: 1024 x 768 px

Orientation: horizontal & vertical

 

****

 

Problem: only the vertical orientation is showing correctly.
When switching the iPad3 from vertical to horizontal orientation a scrollable view of the vertical contents is showing up.

 

Solution:
Change the page size of the horizontal oriented InDesign file to 2047.9 px x 1536 px, remove the old folio, build a new one.

 

Since InDesign CS5.5 does not have a fixed standard preset for 2048 x 1536 px size for files, you are well advised to prepair a  custom document preset for 2047.9 x 1536 px files. Just tested, if 2047.9 px are also good for vertical orientated files and all went well… Otherwise you  need two individual presets…

 

This rounding error should not occur in InDesign CS6 since a fixed standard preset for 2048 x 1536 px is available there…


Note:

I did not change the pages individually from 1024x768px to 2048 x 1536px, but changed the document setup…

 

Uwe

793 Views   4 Replies   Latest reply: Laubender, Aug 13, 2012 10:03 AM
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Replies
  • Neil Enns - Adobe
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    1. Neil Enns - Adobe,
    Aug 10, 2012 11:12 AM   in reply to Laubender
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    Uwe,

     

    Does your document settings have the units set to points/picas or pixels? Make sure the document settings are pixels, there are definitely rounding errors if you use points/picas. Our recommendation is to always use pixels.

     

    Neil

     
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  • Laubender
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    2. Laubender,
    Aug 11, 2012 12:40 AM   in reply to Neil Enns - Adobe
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    @Neil – yes, I'm using pixels for document settings. Always.

    But this issue is no big surprise for me ;-)


    There is an "older" DPS script by Derek Lu at:

    http://www.adobe.com/devnet/digitalpublishingsuite/articles/dps-pdf-to -indesign.html

     

    And even he is mentioning rounding errors (though he is using 1024 x 768 px sized InDesign files).

     

    This is a code snippet from the very top of his "create_indd.jsx" script showing not exact pixel values for creating the possible document settings:

     

    // Use decimals otherwise the multiple article import will
// have rounding errors and not allow a flattened stack.
var PORTRAIT_PAGE_WIDTH = 767.9999;
var PORTRAIT_PAGE_HEIGHT = 1023.9999;
var LANDSCAPE_PAGE_WIDTH = 1023.9999;
var LANDSCAPE_PAGE_HEIGHT = 767.9999;
 
var PORTRAIT_ASPECT_RATIO = PORTRAIT_PAGE_WIDTH / PORTRAIT_PAGE_HEIGHT;
 
var PORTRAIT_GEOMETRIC_BOUNDS = {geometricBounds: [0, 0, PORTRAIT_PAGE_HEIGHT, PORTRAIT_PAGE_WIDTH]};
var LANDSCAPE_GEOMETRIC_BOUNDS = {geometricBounds: [0, 0, LANDSCAPE_PAGE_HEIGHT, LANDSCAPE_PAGE_WIDTH / 2]};

     

     

    The rounding errors are no real problem for me.
    I just wanted to know you, that they are there…

     

    Uwe

     
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  • Neil Enns - Adobe
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    3. Neil Enns - Adobe,
    Aug 13, 2012 9:11 AM   in reply to Laubender
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    Ah, I just realized your source InDesign document is 2048x1536. Don't do that Our recommendation is to build your InDesign documents at 1024x768. There's no benefit to designing at the larger size in InDesign, and as you've discovered, some downsides.

     

    Neil

     
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  • Laubender
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    4. Laubender,
    Aug 13, 2012 10:03 AM   in reply to Neil Enns - Adobe
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    @Neil – yes, thanks for making that clear. It was just for testing a possible MSO bug I mentioned, that is luckily not showing up in my configuration…

     

    Uwe

     
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