Unable to use Vix.Vips.Operation.pdfload/2 method in 0.16 version

[aakashjhawar]

The newer 0.16 version of vix brings pre-compiled binaries but does not support Vix.Vips.Operation.pdfload/2 and Vix.Vips.Operation.pdfload_buffer/2 methods.

How do you recommend if we want to use these methods in the 0.16 version?

Also, if we use 0.15.1v of vix, we are facing the error which is already reported in this issue.

[akash-akya]

Yes, the precompiled libvips only comes with most common formats targeting most common usecase.

How do you recommend if we want to use these methods in the 0.16 version?

You can skip using precompiled libvips and bring your own libvips library with support for formats you want by installing it manually using package manager. This was the default behavior before v0.16.0. To get this behavior in the newer versions set env VIX_COMPILATION_MODE=PLATFORM_PROVIDED_LIBVIPS. More details here -- https://github.com/akash-akya/vix#pre-compiled-nif-and-libvips. Let me know if you face any issue with this.

Also, if we use 0.15.1v of vix, we are facing the error which is already reported in this #77

Did you try the solution mentioned in that issue thread? libvips/php-vips#142 (comment)

[aakashjhawar]

Hi @akash-akya, I tried installing libvips by following the steps mentioned here libvips/php-vips#142 (comment) and I'm using 0.15.1 version of vix.

However, I'm getting this error when I try load PDF. UndefinedFunctionError) function Vix.Vips.Operation.pdfload/2 is undefined or private.

Do you have any example of a Dockerfile where libvips is installed and you are able to use the Vips.Operation.pdfload/2 method?

[akash-akya]

You have to add additional dependencies for PDF format support. Just installing libpoppler-glib-dev package should do it.
something like

RUN \
  apt-get update && \
  apt-get install -y \
    git \
    glib-2.0-dev \
    libexif-dev \
    libexpat-dev \
    libffi-dev \
    libjpeg-dev \
    libpoppler-glib-dev \ # install dependency
    liblcms2-dev \
    libpng-dev \
    libtiff-dev \
    meson \
    unzip \
    wget

Can you share the Dockerfile you used?
You can read more details about the different format support and dependecnies needed to support different formats here -- https://github.com/libvips/libvips#pdfium