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gdkgc: Draw clip mask with Cairo

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This commit is contained in:
Benjamin Otte 2010-07-17 00:42:15 +02:00
parent 37c502eae3
commit 331d77f3d7
1 changed files with 16 additions and 11 deletions
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27
gdk/gdkgc.c
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@ -612,23 +612,28 @@ _gdk_gc_add_drawable_clip (GdkGC *gc,
overlap = cairo_region_contains_rectangle (region, &r);
if (overlap == CAIRO_REGION_OVERLAP_PART)
{
cairo_t *cr;
/* The region and the mask intersect, create a new clip mask that
includes both areas */
priv->old_clip_mask = g_object_ref (priv->clip_mask);
new_mask = gdk_pixmap_new (priv->old_clip_mask, w, h, -1);
tmp_gc = _gdk_drawable_get_scratch_gc ((GdkDrawable *)new_mask, FALSE);
gdk_gc_set_foreground (tmp_gc, &black);
gdk_draw_rectangle (new_mask, tmp_gc, TRUE, 0, 0, -1, -1);
_gdk_gc_set_clip_region_internal (tmp_gc, region, TRUE); /* Takes ownership of region */
gdk_draw_drawable (new_mask,
tmp_gc,
priv->old_clip_mask,
0, 0,
0, 0,
-1, -1);
gdk_gc_set_clip_region (tmp_gc, NULL);
cr = gdk_cairo_create (new_mask);
cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR);
cairo_paint (cr);
gdk_cairo_set_source_pixmap (cr, priv->old_clip_mask, 0, 0);
gdk_cairo_region (cr, region);
cairo_fill (cr);
cairo_destroy (cr);
cairo_region_destroy (region);
gdk_gc_set_clip_mask (gc, new_mask);
g_object_unref (new_mask);
}
else if (overlap == CAIRO_REGION_OVERLAP_OUT)