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Thrawn · Joined: 12 May 2008 Posts: 29 Location: Germany

libHaru Wrapper

Drugwash · Joined: 08 Sep 2008 Posts: 639 Location: Ploiesti, RO

Great library and great wrapper! Cool

One minor issue with the thumbnails example under Win9x: there is no User Shell Folders > My Pictures key, unless maybe there are more users set up, which is not so usual for a Win9x installation.

A small addition would make it work correctly under 9x - all other examples work perfectly:

Thrawn · Joined: 12 May 2008 Posts: 29 Location: Germany

Thanks Drugwash.
I've implemented your improvements.

..:: Free Radical ::.. · Joined: 20 Sep 2006 Posts: 63

Thank you very much for this Very Happy

Would try making a front end for my work

Thrawn · Joined: 12 May 2008 Posts: 29 Location: Germany

Drugwash · Joined: 08 Sep 2008 Posts: 639 Location: Ploiesti, RO

I'm more curious about who corrupts the PNG. From what you say, it could be gdiplus, but I replaced the previous XP-SP2 version (5.1.3102.2180) with XP-SP3 (5.1.3102.5660) and corruption still occurs. Crying or Very sad

When I let libpng13 to handle the PNG files (as you mentioned above), they all come out fine, without corruption. Whadda heck is goin' on here... Question

<->

Thrawn · Joined: 12 May 2008 Posts: 29 Location: Germany

you could adapt the resampling function so the converted pictures won't be deleted and see if they get corrupted before they are embedded in the pdf.
if they are corrupted -> it's gdi+ or the resampling code
if they are fine > its libharus fault

Drugwash · Joined: 08 Sep 2008 Posts: 639 Location: Ploiesti, RO

It gets corrupted right after GDIplus conversion. Guess I gotta find a version that works.. if there's any. Sad

Thanks for the suggestion, got me closer to the (bitter) truth.

Thrawn · Joined: 12 May 2008 Posts: 29 Location: Germany

as a workaround you could use this (ImageMagick Wrapper) to convert the png to jpeg, although it would bloat the example with additional dlls.

Drugwash · Joined: 08 Sep 2008 Posts: 639 Location: Ploiesti, RO

Frankly I kinda dislike the JPEG format due to its lossy nature. PNG has good quality and small size, its only disadvantage would be unsupported alpha layer on 9x systems. I think I'll keep conversion disabled for PNGs in this particular case.

Thanks for providing that link though, hopefully it will be of help for someone.

gwarble · Posted: Thu Aug 27, 2009 7:53 am Post subject:

thanks for a great wrapper, i'm having fun playing with it.

quick question, zlib and libpng13 DLLs are needed, but i like to keep my dlls in %A_ScriptDir%\Resources\*.dll but its not finding them unless they are in %A_ScriptDir%\*.dll or %windir%\system32\*.dll

know how to affect those dlls being called? or is buried inside the libharu .dll

thanks
- gwarble

edit: never could find the call, so temporarily changing SetWorkingDir to the dll folder was the only solution i could find

..:: Free Radical ::.. · Joined: 20 Sep 2006 Posts: 63

Ok, I finally felt the need to use this excellent library for making pdfs from my scanned images. This is so fast. I mean its instantaneous. It converted a set of 1000 images (a mix of HiRes jpegs and pngs) on my lowly dual core in under a second!

Thanks again for this nifty wrapper and excellent examples!

And yes, I used HPDF_LoadPngImageFromFile and not ImageMagick or gdip for the pngs.

Is it possible to embed more formats like bmp, gifs and tiffs without using gdip to convert for this?

EDIT:
I realized I was using libHPDF v2.0.8.0 which never prompted me for libPNG and works like a charm.