Get page count of pdf

[Morfio]

Hello,

I want to count pages in a pdf file. I use "printf("%lu\n", MagickGetNumberImages(m_wand));", but it returns always one page (the pdf has 116 pages). I initiate the MagickWand with "MagickReadImage(m_wand, "test.pdf");".

How do I get the real page count?

Thank you very much

Morfio

[magick]

We're using ImageMagick 6.8.9-1, the current release, and MagickGetNumberImages() returns the correct number of pages in our PDF. Do you check for any exceptions? Check the return value of MagickReadImage(). It should be something other than 0. If its 0, use MagickGetException() to display the error.

[Morfio]

With another pdf it works, but it needs a very long time. With my test pdf file it doesn't work (and needs a long time, too).

Exceptions are not thrown and MagickReadImage returns MagickTrue. Here's my code, maybe there are some mistakes:

Code: Select all

#include <wand/magick_wand.h>

int main() {
    MagickWand *m_wand = NULL;
        
    MagickWandGenesis();
        
    m_wand = NewMagickWand();
    if(MagickReadImage(m_wand, "test.pdf") != MagickTrue)
        return 1;

    printf("%lu\n", MagickGetNumberImages(m_wand));

    ExceptionType ex; 
    printf("%s\n", MagickGetException(m_wand, &ex));

    if(m_wand)
        m_wand = DestroyMagickWand(m_wand);
        
    MagickWandTerminus();

    return 0;
}

Thank you

Morfio

[magick]

Try this:

Code: Select all

#define ThrowWandException(wand) \
{ \
  char \
    *description; \
 \
  ExceptionType \
    severity; \
 \
  description=MagickGetException(wand,&severity); \
  (void) fprintf(stderr,"%s %s %lu %s\n",GetMagickModule(),description); \
  description=(char *) MagickRelinquishMemory(description); \
  exit(-1); \
}
...
  status=MagickReadImage(magick_wand,argv[1]);
  if (status == MagickFalse)
    ThrowWandException(magick_wand);

That way any exception is displayed. You code appears to return if there is an exception.

[Morfio]

With this code I get this result:

Code: Select all

1
test2.c main 28

Here's the code:

Code: Select all

#include <wand/magick_wand.h>

#define ThrowWandException(wand) \
{ \
  char \
    *description; \
 \
  ExceptionType \
    severity; \
 \
  description=MagickGetException(wand,&severity); \
  (void) fprintf(stderr,"%s %s %lu %s\n",GetMagickModule(),description); \
  description=(char *) MagickRelinquishMemory(description); \
  exit(-1); \
}

int main() {
	MagickWand *m_wand = NULL;
	
	MagickWandGenesis();
	
	m_wand = NewMagickWand();
	if(MagickReadImage(m_wand, "gna.pdf") != MagickTrue)
		return 1;

	printf("%lu\n", MagickGetNumberImages(m_wand));

	ThrowWandException(m_wand);

	if(m_wand)
		m_wand = DestroyMagickWand(m_wand);
	
	MagickWandTerminus();

	return 0;
}

[magick]

We need to test your PDF. Post a URL to your PDF. We need to reproduce the problem before we can comment further.

[Morfio]

Here we go: http://dynsoft.com/files/warehouse/Handbook_1.6.2.pdf

[magick]

We're using ImageMagick 6.8.9-1 and Ghostscript 9.10. Your program returns:

• -> ./pdf
  116
  pdf.c main 28

We're not sure why its failing for you.

[Morfio]

I'm using "6.8.0 Q16 HDRI" on FreeBSD 10.0 amd64.

[dlemstra]

And your ghostscript version is?