Hi

I use fop 0.20.5

I whould like to concatenate images vertically. The problem is that FOP add
a blank space in between. By adding space-before="-2.5pt", the blank space
disappear. Unfortunately, this doesn't work in all cases. It works if
preceding image is bigger than 10 pixels, otherwise, a blank space appears
again.

In the example hereafter, if first.jpg is smaller than around 10 pixels,
then the space-before="-2.5pt" applied on  "second.jpg" is not sufficient..
A value of -6pt or more is needed to compensate the bigger space added by
FOP. Seemingly, the smaller is the preceding image, the bigger is the gap.

  <fo:external-graphic src="first.jpg"/>
  <fo:external-graphic space-before="-2.5pt" src="second.jpg"/>
  <fo:external-graphic space-before="-2.5pt" src="third.jpg"/>
Can anybody provide me with an explanation and some help to find the good
value for space-before

many thanks in advance
jf



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