from http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=339467 At -r25 (frame-gs25.png), the 4 borders are displayed. But at -r50 (frame-gs50.png), only 2 are displayed. The images were generated with: gs < /dev/null -sDEVICE=png16m -sOutputFile=frame-gs25.png -r25 frame-rr.pdf gs < /dev/null -sDEVICE=png16m -sOutputFile=frame-gs50.png -r50 frame-rr.pdf Seems strange that improving resolution, decrease quality... Bastien
This file also shows similar resolution-dependant effects on Acrobat Reader.
In addition to above, also shows resolution dependant effects on xpdf, poppler, Jaws and Harlequin. To me, that points the finger at the producer rather than consumer (in this case "producer" does not mean GS 5.x which converted presumably PS into PDF, but the application which originally create the PS).
Created attachment 8790 [details] Simplified sample file
This is an interaction between the bounding box of a form and a rectangle that is partly stroked about 0.5 pt outside of the bounding box with 1 pt line. The effect depends on relative rounding of the bounding box and the stroked path. The line position is also a subject of stroke adjust. Ghostscript cannot know that the user wanted to draw a frame. It just rounds every object independently and draws the result.