[Bug 89295] [sna suse] weird glyphs in thunderbird

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89295

--- Comment #4 from Chris Wilson <chris at chris-wilson.co.uk> ---
Let's rule out the clip boxes change first:

diff --git a/src/sna/sna.h b/src/sna/sna.h
index 04875b8..89081db 100644
--- a/src/sna/sna.h
+++ b/src/sna/sna.h
@@ -1202,6 +1202,7 @@ __find_clip_box_for_y(const BoxRec *begin, const BoxRec
*end, int16_t y);
 inline static const BoxRec *
 find_clip_box_for_y(const BoxRec *begin, const BoxRec *end, int16_t y)
 {
+#if 0
        /* Special case for incremental trapezoid clipping */
        if (begin == end)
                return end;
@@ -1211,6 +1212,7 @@ find_clip_box_for_y(const BoxRec *begin, const BoxRec
*end, int16_t y)
                return begin;
        if (y > end[-1].y2)
                return end;
+#endif

        /* Otherwise bisect to find the first box crossing y */
        return __find_clip_box_for_y(begin, end, y);

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