| Summary: | Additional differences in dithered output with ps2write | ||
|---|---|---|---|
| Product: | Ghostscript | Reporter: | Marcos H. Woehrmann <marcos.woehrmann> |
| Component: | PS Writer | Assignee: | Ken Sharp <ken.sharp> |
| Status: | CONFIRMED --- | ||
| Severity: | enhancement | ||
| Priority: | P4 | ||
| Version: | master | ||
| Hardware: | PC | ||
| OS: | Linux | ||
| Customer: | Word Size: | --- | |
| Attachments: | screenshot.png | ||
It looks like these pages are using type 10 halftones. These were introduced in 2015, so the ps2write code assumes that they can't be used (not baseline level2). It seems that this causes a fallback to an image, which uses the current default halftone to render instead of the custom type 10 halftone. This results in the difference in output. I think it would be useful to preserve type 10 halftones, but this is an enhancement, not a bug, really. |
Created attachment 7186 [details] screenshot.png Pages 5, 6, and 7 of the ps3cet file 09-40.PS look very different when converted to pkmraw directly and via ps2write (see attached screenshot.png, the direct image is on the left, via ps2write is on the right). Command lines: ./bin/gs -o test.ps -sDEVICE=ps2write -r300 ./ps3cet/09-40.PS ./bin/gs -o test.pkm -sDEVICE=pkmraw -r300 ./test.ps ./bin/gs -o test2.pkm -sDEVICE=pkmraw -r300 ./ps3cet/09-40.PS