| Summary: | Infinite loop when scaling very small values using 24.8 | ||
|---|---|---|---|
| Product: | cairo | Reporter: | Sebastien Pouliot <sebastien> |
| Component: | general | Assignee: | Carl Worth <cworth> |
| Status: | RESOLVED FIXED | QA Contact: | cairo-bugs mailing list <cairo-bugs> |
| Severity: | normal | ||
| Priority: | medium | ||
| Version: | 1.5.7 | ||
| Hardware: | Other | ||
| OS: | All | ||
| URL: | https://bugzilla.novell.com/show_bug.cgi?id=340809 | ||
| Whiteboard: | |||
| i915 platform: | i915 features: | ||
| Attachments: | Test case | ||
The test case looks like the degenerate-pen that was fixed in 1.5.2 - but that is earlier than this report. However, the bug is unreproducible now with 1.8.0 which uses 24.8 fixed point. |
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Created attachment 13991 [details] Test case When using cairo defining CAIRO_FIXED_FRAC_BITS as 8 in cairo-fixed-private.h I am hitting an infinite loop with the next test case[1] (that works fine using 16bits): cairo_t *cr; cr = gdk_cairo_create (widget->window); cairo_save (cr); cairo_scale (cr, 1, 0.0001); cairo_translate (cr, 1, 0.0001); cairo_move_to (cr, 44.12, 106); cairo_curve_to (cr, 43.946765, 93.855989, 38.653008,89.286968,26,90); cairo_stroke (cr); cairo_restore (cr); cairo_destroy (cr); it loops inside _cairo_pen_stroke_spline_half because the step never increases.