On 04/05/2013 12:41 PM, Jean-Pierre Chrétien wrote:
Hello,
A recent post on lyx-fr
http://thread.gmane.org/gmane.editors.lyx.french/1769
draw my attention about a bounding box consistency problem for the
exemple.png file attached to this post, which may happen with other png
files unless this one is very particular.
This image is recognised by LyX as being 400x900
(Graphics>Clipping>Get from file).
However clipping to {90,30,370,815} to remove left legend and title
fails completely and moves the figure around the page whatever the LaTeX
engine chosen, in spite of the fact that clipping appears correctly in
the LyX window.
Converting externally the file to eps with IM convert gives a BB of
0 0 203 456. Clipping the original png figure to homothetic values
{46,15,188,413} gives a wrong clipping on screen, but a correct one on
the output.
Moreover, applying the ebb utility to exemple.png gives a BB of
0 0 288 648
but this is harmless as LyX obviously does not use this utility.
Applying
$ identify -verbose exemple.png | head
Image: exemple.png
Format: PNG (Portable Network Graphics)
Class: DirectClass
Geometry: 400x900+0+0
Resolution: 55.9x55.9
Print size: 7.15564x16.1002
Units: PixelsPerCentimeter
does not help much, I don't see data explaining the difference between
the difference in pixel size in png and eps.
Does this deserve an entry in bugzilla ? A warning in the docs ?
I've opened http://www.lyx.org/trac/ticket/8688 for this.
--
Julien
