Created attachment 54207 [details]
compare with Adobe Reader
pdftoppm can't rasterize some outlined font with smooth.
I tried with Splash and Cairo both but result is same.
I attached png image(compared with Adobe Reader) and pdf.
command: pdftoppm "outline1.pdf" -f 1 -l 1 -r 200 -cropbox -freetype yes -aa yes -aaVector yes "outline1.ppm"
Created attachment 54208 [details]
pdf contains outlined font
Seems to be solved with actual poppler / freetype
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