| Summary: | pattern_create_linear with pattern_add_color_stop_rgba with offset 0.5 failed | ||
|---|---|---|---|
| Product: | cairo | Reporter: | Volker <volkerobhof> |
| Component: | pdf backend | Assignee: | Adrian Johnson <ajohnson> |
| Status: | RESOLVED FIXED | QA Contact: | cairo-bugs mailing list <cairo-bugs> |
| Severity: | normal | ||
| Priority: | medium | ||
| Version: | 1.10.2 | ||
| Hardware: | Other | ||
| OS: | All | ||
| Whiteboard: | |||
| i915 platform: | i915 features: | ||
| Attachments: |
pattern bug example
working example of pattern working view bugged view adobe bug view evince |
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Created attachment 68177 [details]
working example of pattern
Created attachment 68178 [details]
working view
Created attachment 68179 [details]
bugged view adobe
Created attachment 68180 [details]
bug view evince
Can't reproduce with git/master, bug was already fixed. Git bisect finds (which is commit 1.10.0-231-g3cbe82f aka 1.11.2~98, so anything 1.11.2 or newer should be fine): commit 3cbe82fe586f64dd11a0b2bc9f58619968965369 Author: Andrea Canciani <ranma42@gmail.com> Date: Sun Dec 12 22:29:56 2010 +0000 ps,pdf: Deal with empty domain gradients. If all the stops of the gradient have the same offset and the pattern's extend mode is EXTEND_PAD, then we cannot use the stops' domain as the interpolation parameter range because this would produce a gradient with the same start and end objects. Such ranges tickle bad behaviour in rasterisers. We replace the color function with an appropriate step function defined on [0 1]. Fixes radial-gradient-one-stop for pdf and ps3. Reviewed-by: M Joonas Pihlaja <jpihlaja@cc.helsinki.fi> |
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Created attachment 68176 [details] pattern bug example There is a bug by creating a line with cairo_pattern_create_linear() and cairo_pattern_add_color_stop_rgba(). If the offset of cairo_pattern_add_color_stop_rgba() in the first call is 0.0 and in the other 1.0 it works fine with Adobe Acrobat Reader and Evince document viewer on ubuntu 12.04. If I set the offset to 0.5 on both function calls in Adobe Acrobat Reader and in Evince document viewer the line disappears also on Ubuntu 12.04. I also attached the example as source code and views from document viewers. This bug has no effect on png outputs.