ghostscript 9.26 update breaks imagick readImage for multipage PDF

4
votes

Since the ghostscript update 9.25 -> 9.26 (on debian) last morning we get this error:

ErrorMessage: FailedToExecuteCommand 
`'gs' -sstdout=%stderr -dQUIET -dSAFER -dBATCH -dNOPAUSE -dNOPROMPT
 -dMaxBitmap=500000000 -dAlignToPixels=0 -dGridFitTT=2 
'-sDEVICE=pngalpha' -dTextAlphaBits=4 -dGraphicsAlphaBits=4 '-r300x300' 
-dFirstPage=1 -dLastPage=1 '-sOutputFile=/tmp/magick-39903EapVvuyNQxL4%d' 
'-f/tmp/magick-39903VD0GMIpLPaIN' 
'-f/tmp/magick-399031owlSOb4aOEw'' (-1) 
@ error/delegate.c/ExternalDelegateCommand/462

When trying to read the first page of a multipage PDF:

$this->resource = new \Imagick();
$this->resource->setResolution(300, 300);
$this->resource->readImage($path . '[0]');

any idea how this problem can be solved?

See: https://www.ghostscript.com/doc/9.26/History9.htm#Version9.26 See: https://secure.php.net/manual/en/imagick.readimage.php

3
phpghostscriptimagick
Btw. another error causing problem with this update was that Imagick scaleImage resets the value of setImageDepth. So make sure to set the depth at the end of your image operations. - ownking

3 Answers

2
votes

Almost certainly this bug report:

https://bugs.ghostscript.com/show_bug.cgi?id=699815

Your solutions are; don't use the pngalpha device, don't use FirstPage/LastPage, upgrade to a version with the fix, or downgrade to an earlier version. Though that bug is potentially present in many earlier versions, I don't know why it hasn't exhibited before.

2
votes

I don't have "a solution" but can confirm the problem since upgrading to gs 9.26. I figured out, that, as KenS pointed out, everything works fine when removing the parameters -dFirstPage=1 -dLastPage=1 in gs.

What also works is to remove the gs-parameter -dMaxBitmap=500000000. Meaning in PHP, remove the [PAGE] i.e.:

$im = new \Imagick();
$im->readImage('/tmp/test.pdf');

My Working solution was a downgrade to ghostscript 9.22. I am using Ubuntu bionic LTS. Therefore I had to run:

sudo apt-get remove ghostscript
sudo apt-get autoremove
sudo apt-get install ghostscript=9.22~dfsg+1-0ubuntu1 libgs9=9.22~dfsg+1-0ubuntu1 libgs9-common=9.22~dfsg+1-0ubuntu1
sudo apt-mark auto libgs9
sudo apt-mark auto libgs9-common
0
votes

(Ghostscript 9.26) Had the same problem, after increasing setResolution(600, 600) started working again.