pdftoppm and pdftocairo rendering difference
pdftoppm shows the annotated content of sample.pdf fully correct, but
pdftocairo seems to miss the z-order at the "Virtual Mechanics" text.
pdftoppm -png -r 72 -f 1 -l 1 -scale-to 800 sample.pdf > sample-pdftoppm.png pdftocairo -pdf sample.pdf sample-pdftocairo.pdf
pdftoppm version 0.41.0 pdftocairo version 0.41.0
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