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compositor: Reduce glyph "overlap" if the inked pixels are opaque

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We can ignore the issue of overdraw if when we paint the glyphs, the
result is opaque.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2012-10-09 17:37:53 +01:00
parent 66500ef29f
commit fbf528f46d
1 changed files with 7 additions and 0 deletions
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7
src/cairo-composite-rectangles.c
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@ -444,6 +444,13 @@ _cairo_composite_rectangles_init_for_glyphs (cairo_composite_rectangles_t *exten
if (unlikely (status))
return status;
if (overlap && *overlap &&
scaled_font->options.antialias == CAIRO_ANTIALIAS_NONE &&
_cairo_pattern_is_opaque_solid (&extents->source_pattern.base))
{
*overlap = FALSE;
}
return _cairo_composite_rectangles_intersect (extents, clip);
}