[cairo-bugs] [Bug 50412] New: [patch] add comment to explain _cairo_edge_compute_intersection_*, improve code readability

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=50412

             Bug #: 50412
           Summary: [patch] add comment to explain
                    _cairo_edge_compute_intersection_*, improve code
                    readability
    Classification: Unclassified
           Product: cairo
           Version: 1.12.2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: general
        AssignedTo: cworth at cworth.org
        ReportedBy: dongsheng.xing at intel.com
         QAContact: cairo-bugs at cairographics.org


diff --git a/src/cairo-fixed-private.h b/src/cairo-fixed-private.h
index b6cc6be..1956cf9 100644
--- a/src/cairo-fixed-private.h
+++ b/src/cairo-fixed-private.h
@@ -311,7 +311,7 @@ _cairo_fixed_mul_div_floor (cairo_fixed_t a, cairo_fixed_t
b, cairo_fixed_t c)
     return _cairo_int64_32_div (_cairo_int32x32_64_mul (a, b), c);
 }

-
+/* compute y from x so that (x,y), p1, and p2 are collinear */
 static inline cairo_fixed_t
 _cairo_edge_compute_intersection_y_for_x (const cairo_point_t *p1,
                                          const cairo_point_t *p2,
@@ -332,6 +332,7 @@ _cairo_edge_compute_intersection_y_for_x (const
cairo_point_t *p1,
     return y;
 }

+/* compute x from y so that (x,y), p1, and p2 are collinear */
 static inline cairo_fixed_t
 _cairo_edge_compute_intersection_x_for_y (const cairo_point_t *p1,
                                          const cairo_point_t *p2,

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