Re: [Gimp-user] I need to know how much was cropped with autocrop

2007-08-08 Thread Jozef Legeny
maybe creating a layer = copy of the image size-way; make it invisible
(that should avoid autocropping it) and then compare it's size and
position with the cropped image.


On 8/1/07, David Feinzeig [EMAIL PROTECTED] wrote:
 I am writing a plugin that, among other things, autocrops an image.  But, I
 need to know how much was cropped from all four sides, to deal with
 alignment issues.  Any idea how I can do this?

 Thanks!
 Dave
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Re: [Gimp-user] I need to know how much was cropped with autocrop

2007-08-08 Thread David Gowers
 On 8/1/07, David Feinzeig [EMAIL PROTECTED] wrote:
  I am writing a plugin that, among other things, autocrops an image.  But, I
  need to know how much was cropped from all four sides, to deal with
  alignment issues.  Any idea how I can do this?
 
  Thanks!
  Dave
If you create a rectangular path that matches the image boundaries,
you can calculate the offset and amount cropped from the difference
between the corner coordinates of the path and the corner coordinates
of the layer.

OTOH if you're just autocropping a *layer*, not an image, you can just
compare image corners to layer corners.

HTH.
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Re: [Gimp-user] I need to know how much was cropped with autocrop

2007-08-08 Thread saulgoode
 On 8/1/07, David Gower wrote:

 OTOH if you're just autocropping a *layer*, not an image, you can just
 compare image corners to layer corners.

While looking into this, I notice that autocropping an image uses the
active layer, not the projection, to determine the resultant image
boundaries. (Would this be a bug?)

Based on this behavior, there is no real advantage (from a scripting
standpoint; you still have to process each layer individually) to doing a
crop image as opposed to a crop layer. By processing each layer
individually, its boundary offsets and dimensions remain relative to the
original image, easing the task of comparing their before and after
values.
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Re: [Gimp-user] I need to know how much was cropped with autocrop

2007-08-08 Thread Sven Neumann
Hi,

On Wed, 2007-08-08 at 11:35 -0400,
[EMAIL PROTECTED] wrote:

 While looking into this, I notice that autocropping an image uses the
 active layer, not the projection, to determine the resultant image
 boundaries. (Would this be a bug?)

No. That's what the plug-in does and it seems that's what the plug-in
author wanted it to do.


Sven


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Re: [Gimp-user] I need to know how much was cropped with autocrop

2007-08-08 Thread Akkana Peck
[EMAIL PROTECTED] writes:
 While looking into this, I notice that autocropping an image uses the
 active layer, not the projection, to determine the resultant image
 boundaries. (Would this be a bug?)

If you want a plug-in that crops the image according to the contents
of all layers, not just the active one, I have one:
http://shallowsky.com/software/gimp/autocropall.c

-- 
...Akkana
Beginning GIMP: From Novice to Professional: http://gimpbook.com
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