Legacy ImageMagick Discussions Archive

the djvu format supports separate highlight and text layers. Can they be rendered with the magickwand api?
I would then like to add this facility to the Emacs Imagemagick loader.

/Joakim

I'm working on an Emacs bug:

http://debbugs.gnu.org/cgi/bugreport.cgi?bug=7955

Could you offer an opinion on the best way to solve this?

Ok I think there is an error on our part. We did ReadImage, fed it to newmagickwand, but never destroyimage

We are developing a IM backend for Emacs 24 and we are experiencing memory leaks, particularily with the PNG format.
The code is in image.c.

http://git.savannah.gnu.org/cgit/emacs. ... rc/image.c

Any help apreciated

Ok, next related issue. In order to figure out how many pages there were in the djvu bundle I did: ping_wand=NewMagickWand(); if (filename != NULL) { status = MagickPingImage(ping_wand, filename); This segfaults for my djvu bundle! It does work for single page djvu files, and for PDF:s, even if its ...

Im sorry, I mistakenly built 6.6.2-8. Now Im using imagemagick SVN and now it finaly works! Thanks!

I tried image_info -> number_scenes = 1; image_info -> scene = 2; But still imagemagick seems to try to render the entire djvu in ram, crashing the program. However, this seems to work: image_info -> number_scenes = 1; that is, not setting the "scene" member. Then I get the 1st image very quickly. I ...

Is the same syntax available from C code? Or does the interface look different?
A file could presumably have an actual name of "x.djvu[2]" so a separate call to identify the page would seem apropriate from C at least.

Thanks for the reply! So, if I use your method I can speed up finding out the number of pages. But how do I then speed up showing the actual page I want to show? My code as it is seems to load and render the entire document. Note that Im talking about djvu files here, which are distinct discrete ...

Im working on a branch of Emacs which supoprts loading of images using the ImageMagick MagickWand API. It works well except for some problems with loading multi page image bundles, such as djvu, pdf, etc. It appears the MagickWand api loads all the pages in a bundle, and renders them in memory ...