This can get very difficult. Especially with pages that are more than just text and images. Lines, interactive content, optional layers, annotations, embedded content, blend mode transparencies. All of this and more make things complex.
The real problem is that reading a pdf is vastly more complex than writing a pdf.
The spec (1000+ pages) is open to interpretation and different readers interpret it differently. A page that might render perfectly in adobe may look different when viewed in firefox or chrome or ghostscript.
The real problem is that reading a pdf is vastly more complex than writing a pdf.
The spec (1000+ pages) is open to interpretation and different readers interpret it differently. A page that might render perfectly in adobe may look different when viewed in firefox or chrome or ghostscript.