| Summary: | Gradients not rendered with the new PDF interpreter | ||
|---|---|---|---|
| Product: | Ghostscript | Reporter: | Guillaume Ayoub <guillaume> |
| Component: | PDF Interpreter | Assignee: | Ken Sharp <ken.sharp> |
| Status: | RESOLVED FIXED | ||
| Severity: | normal | ||
| Priority: | P4 | ||
| Version: | 9.56.1 | ||
| Hardware: | PC | ||
| OS: | Linux | ||
| Customer: | Word Size: | --- | |
| Attachments: |
Sample 1
Sample 2 Sample 3 |
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Created attachment 22410 [details]
Sample 2
Created attachment 22411 [details]
Sample 3
We have the problem converting the PDF into a PNG file, using: gs -q -dNOPAUSE -dSAFER -dBATCH -sDEVICE=png16m -sOutputFile=gradient1.png gradient1.pdf Two of the files use an 'unusual' and rather over complicated definition of a gradient and also use unusual bounds for the parameteric variable; instead of ranging from 0 to N they range from -M to +N. We were checking the wrong values for the Bounds of the sub functions, causing an error, which is fixed here: bb53c6400abf474feb50125a4e438338fc6ba000 Note that sample 3 does not contain a gradient at all, which is why it is unaffected. Thanks for the report. (In reply to Ken Sharp from comment #4) > Two of the files use an 'unusual' and rather over complicated definition of > a gradient and also use unusual bounds for the parameteric variable; instead > of ranging from 0 to N they range from -M to +N. > > We were checking the wrong values for the Bounds of the sub functions, > causing an error, which is fixed here: > > bb53c6400abf474feb50125a4e438338fc6ba000 > > Note that sample 3 does not contain a gradient at all, which is why it is > unaffected. > > Thanks for the report. Thanks a lot for the fix. Sorry about the unnecessarily complicated gradients: these files are the results of unit tests trying crazy corner cases of CSS gradients… |
Created attachment 22409 [details] Sample 1 With the new interpreter, some on our testing PDF files are rendered as white rectangles when a gradient is used. We got correct rendering with 9.55.0. Here are 3 (almost identical) samples. Samples 1 and 2 give colored rectangles with 9.55 but white rectangles with 9.56. Sample 3 gives the correct rendering with both 9.55 and 9.56. We also get an error when we use -dNEWPDF=false, with the 3 samples: **** Error reading a content stream. The page may be incomplete. Output may be incorrect. **** Error: File did not complete the page properly and may be damaged. Output may be incorrect. Thank you!