Re: [xep-support] Re: Image scaling

Mark,

I don't have any special insight on this, but I was thinking before when I read your first posting that the engine would not be able to know the height on just one pass precisely because of the variable height of the text. It seems to me you have to get feedback from the engine as an intermediary stage and provide the height on a second pass.

Jim Mott

----- Original Message -----
  From: Mark Cilia Vincenti
  To: xep-support@renderx.com
  Sent: December 10, 2008 3:33 AM
  Subject: Re: [xep-support] Re: Image scaling

  Hi Alexei,

  Thanks for your email.
  Unfortunately it's the height I don't know, because if the text in the box wraps, then it would increase the height. I tried cheating using reference-orientation but it did not work.

  2008/12/10 Alexei Gagarinov <agagarinov@renderx.com>

    Hi Mark,

      <fo:block line-height="0pt">
       <fo:external-graphic
             content-width="scale-to-fit" content-height="scale-to-fit"
             scaling="non-uniform" scaling-method="resample-any-method">

      ...

    You should set the viewport's area using @width and @height attributes on the fo:external-graphic element.

    If @width and @height are omitted then they are treated as 'auto' and it means that viewport's area equals to the intrinsic size of the graphic.

    And what you do is scaling the intrinsic size of the image to the ... yeah, to the same value.

    So, in order to scale the graphics width to a table cell, you need the following:
    <fo:external-graphic width="100%" content-width="scale-to-fit" src="...">

    But you cannot scale the image's height to an arbitrary block (a table cell in your example) using a percentage value because the height of this block depends of its content.
    So you should know the height of the surrounding box ahead and specify this length as a value of @height on fo:external-graphic.

    Regards,
     Alexey Gagarinov
    RenderX

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Received on Wed Dec 10 07:00:52 2008