a m,
It looks like the primatives are actually being drawn....you have
to zoom out (shift-z) way out and look in the upper right corner. Gerbv
doesn't recalculate the bounding box when new primatives are added
through libgerbv. This is a bug, so I've just added the recalculation
code to git. Please update to the latest git and it should work as
expected now.
Cheers--
Julian
On 07/28/2010 03:12 AM, a m wrote:
Julian,
thanks for that response. It looks like i was checking the wrong
account and didn't get your responses. I'm back to looking at this
project and am still having trouble drawing on an existing gerber file.
I've modified example6 to read in a gerber file of my own -- a solder
mask. i'm trying to draw a rectangle and a line on it. I output the
min and max (x,y) coordinates to make sure I'm within the image with
the drawings, but can't see my changes. Please see the attached file.
I know I must be missing something. Changing the color works for me,
but the drawn parts don't show up, either in this example or when i
try to save the modified image to file.
the image dimensions that I get from running the compiled executable are:
Image width min: 1.660000
Image height min: 4.225000
Image width max: 12.113500
Image height max: 8.175000
Anything obvious that i'm doing wrong?
am
On Tue, Jun 22, 2010 at 4:18 PM, Julian Lamb <[email protected]
<mailto:[email protected]>> wrote:
aM,
I sent 2 emails to you directly last week....did you not get
them? If not, here they are. I'm guessing you may still have
multiple libraries on your system (see last part). Let me know if
this doesn't help.
aM,
Hmmm...it works fine here. I'm guessing you still may be
linking to the previous libgerbv library, since I just added the
ability to pass NULL as the transform pointer. You can try make
clean, then make install on the gerbv source...you can also try
manually deleting the library from your /usr/local directory (or
wherever you're installing it to and try compiling the examples
again). Worst case, you can just replace the relevant code in the
examples you're interested in to:
gerbv_user_transformation_t identityTransform =
{0,0,1,1,0,FALSE,FALSE,FALSE};
thisTransform = &identityTransform;
/* export the first (and only) image in the project, which
will be the
one we just loaded */
gerbv_export_rs274x_file_from_image ("example1-output.gbx",
mainProject->file[0]->image, thisTransform);
Another possible culprit may be multiple libgerbv libraries on
your system. You can find out the library location by using:
ldd /usr/local/bin/gerbv (or wherever the gerbv binary is installed)
If you have also installed gerbv using a package on your system
(ubuntu, fedora, etc), this may be causing multiple libraries to
exist. To fix this, and make the examples use the version you are
installing, do this:
2. If you installed gerbv to "/usr/local" (the default), many
distributions don't correctly point pkgconfig to this
target.
To fix this, add the following to your ~/.bashrc file:
export
PKG_CONFIG_PATH=/usr/local/lib/pkgconfig/:/usr/lib/pkgconfig/
Hope this helps--
Julian
On 06/22/2010 02:09 AM, a m wrote:
Any idea about the segfaults? They seem to happen in the
gerbv_export_rs274x_file_from_image () call.
thanks
On Fri, Jun 11, 2010 at 6:50 PM, a m <[email protected]
<mailto:[email protected]>> wrote:
That was quick. I did a [git pull] to grab the changes, ran
[make], and [make install].
All of the examples now compile for me. However, all of the
previously broken ones (1,2,4,5) now give me segmentation
faults.
thanks,
aM
On Fri, Jun 11, 2010 at 4:03 PM, Julian Lamb
<[email protected] <mailto:[email protected]>> wrote:
aM,
Thanks for spotting this problem...I guess I missed
updating the example files when we changed the API
previously. I went ahead and fixed it all in git, so
please update your tree and check out the changes.
Basically, pass NULL in for the transform and the
function will just use the default identity transform. I
think I checked all 6 of the examples and they should
work now. Let me know if you find otherwise, and feel
free to ask any questions regarding libgerbv...we're glad
to help!
Cheers--
Julian
On 06/11/2010 02:55 AM, a m wrote:
Julian,
Thanks for the prompt reply. Ive finally installed all
the dependencies and was able to build it from source.
I ran into problems with examples 1, 2, 4, 5. All the
same thing:
example5.c:56: error: too few arguments to function
‘gerbv_export_rs274x_file_from_image’
looks like a transform is missing. Whatś a quick way to
get this working?
Thanks again, it looks like this library will be perfect.
aM
On Tue, Jun 8, 2010 at 5:37 PM, Julian Lamb
<[email protected] <mailto:[email protected]>> wrote:
Hi aM,
It depends on how in-depth you want to go. We
have split out "libgerbv" as a separate library
you're welcome to use in your own applications. If
you download the gerbv source from git (see webpage
on how to do this), look at the /doc/example-code/
directory for a bunch of examples on making some
command line apps using libgerbv. The rendering
code is also accessible with libgerv, so you can
make fully functional GUI apps with it too.
If you want to just use the regular gerbv
program and add some specialized functions of your
own, that would be another option. Go to
/src/interface.c to add any buttons or menu entries
you want to add, and then place the callbacks for
those buttons in the /src/callback.c file. You can
then put whatever code you want in those callback
stubs. There's an example in /doc/example-code on
how to draw rectangles. For zooming to specific
levels, you'll probably just want to look at the
functions in callbacks.c on how to do that.
Hack away!
Julian
On 06/08/2010 01:36 AM, a m wrote:
Hello,
Im wondering how it would be possible for me to
zoom in on a certain region or a drawing that is
specified by typing in (x, y, width, height)
parameters. Another use case would be to draw a box
or circle based on the above parameters.
Where would i start to be able to do something like
this?
In general, how scriptable is gerbv? how can i
start hacking?
thanks,
aM
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