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[cairo] Describe the restrictions upon cairo_set_tolerance()

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Truc Troung reported that the behaviour of
cairo_set_tolerance()/cairo_get_tolerance() was inconsistent with the
documentation, i.e. we failed to mention that the tolerance would be
restricted to the smalled fixed-point value.

Add a sentence to the documentation that describes the restriction without
mentioning what that is... Hopefully that is sufficient detail to
accommodate the reporter, without exposing internal implementation details.

Fixes https://bugs.freedesktop.org/show_bug.cgi?id=20095
Bug 20095 - The cairo_set_tolerance() function behavior is inconsistency
with the spec
This commit is contained in:
Chris Wilson 2009-02-13 10:03:22 +00:00
parent e7d4bc3d86
commit de7270cb1e
1 changed files with 4 additions and 1 deletions
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5
src/cairo.c
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@ -816,7 +816,10 @@ cairo_get_source (cairo_t *cr)
* is less than @tolerance. The default value is 0.1. A larger
* value will give better performance, a smaller value, better
* appearance. (Reducing the value from the default value of 0.1
* is unlikely to improve appearance significantly.)
* is unlikely to improve appearance significantly.) The accuracy of paths
* within Cairo is limited by the precision of its internal arithmetic, and
* the prescribed @tolerance is restricted to the smallest
* representable internal value.
**/
void
cairo_set_tolerance (cairo_t *cr, double tolerance)