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[cairo-gstate] Return immediately if clip bounds is empty

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This commit is contained in:
Behdad Esfahbod 2008-06-02 22:46:21 -04:00
parent 3f5051fab1
commit 2f4d8fd071
1 changed files with 8 additions and 0 deletions
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8
src/cairo-gstate.c
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@ -1557,6 +1557,9 @@ _cairo_gstate_show_glyphs (cairo_gstate_t *gstate,
_cairo_gstate_transform_glyphs_to_backend (gstate, glyphs, num_glyphs,
transformed_glyphs, &num_glyphs);
if (!num_glyphs)
goto CLEANUP_GLYPHS;
status = _cairo_gstate_copy_transformed_source (gstate, &source_pattern.base);
if (status)
goto CLEANUP_GLYPHS;
@ -1700,6 +1703,11 @@ _cairo_gstate_transform_glyphs_to_backend (cairo_gstate_t *gstate,
if (_cairo_gstate_int_clip_extents (gstate, &surface_extents))
drop = FALSE; /* unbounded surface */
else {
if (surface_extents.width == 0 || surface_extents.height == 0) {
/* No visible area. Don't draw anything */
*num_transformed_glyphs = 0;
return;
}
/* XXX We currently drop any glyphs that has its position outside
* of the surface boundaries by a safety margin depending on the
* font scale. This however can fail in extreme cases where the