gfx/cairo/quartz-glyph-extents.patch

Tue, 06 Jan 2015 21:39:09 +0100

author
Michael Schloh von Bennewitz <michael@schloh.com>
date
Tue, 06 Jan 2015 21:39:09 +0100
branch
TOR_BUG_9701
changeset 8
97036ab72558
permissions
-rw-r--r--

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

     1 --- a/gfx/cairo/cairo/src/cairo-quartz-font.c	Wed Dec 23 14:17:44 2009 -0500
     2 +++ b/gfx/cairo/cairo/src/cairo-quartz-font.c	Wed Dec 23 20:45:00 2009 +0000
     3 @@ -420,6 +420,16 @@ _cairo_quartz_init_glyph_metrics (cairo_
     4  	!CGFontGetGlyphBBoxesPtr (font_face->cgFont, &glyph, 1, &bbox))
     5  	goto FAIL;
     7 +    /* broken fonts like Al Bayan return incorrect bounds for some null characters,
     8 +       see https://bugzilla.mozilla.org/show_bug.cgi?id=534260 */
     9 +    if (unlikely (bbox.origin.x == -32767 &&
    10 +                  bbox.origin.y == -32767 &&
    11 +                  bbox.size.width == 65534 &&
    12 +                  bbox.size.height == 65534)) {
    13 +        bbox.origin.x = bbox.origin.y = 0;
    14 +        bbox.size.width = bbox.size.height = 0;
    15 +    }
    16 +
    17      status = _cairo_matrix_compute_basis_scale_factors (&font->base.scale,
    18  						  &xscale, &yscale, 1);
    19      if (status)

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