Add new _cairo_pattern_create_in_error.

Propagate error values from cr->status to pattern->status.

ChangeLog

@@ -1,3 +1,12 @@
+2005-06-13  Carl Worth  <cworth@cworth.org>
+
+	* src/cairoint.h:
+	* src/cairo-pattern.c: (_cairo_pattern_create_in_error): Add new
+	_cairo_pattern_create_in_error.
+
+	* src/cairo.c: (cairo_get_source): Propagate error values from
+	cr->status to pattern->status.
+
 2005-06-13  Carl Worth  <cworth@cworth.org>
 
 	* src/cairo.c (_cairo_set_source_solid),

src/cairo-pattern.c

@@ -263,6 +263,37 @@ _cairo_pattern_create_solid (const cairo_color_t *color)
     return &pattern->base;
 }
 
+/**
+ * _cairo_pattern_create_in_error:
+ * @status: an error status
+ * 
+ * Create an empty #cairo_pattern_t object to hold an error
+ * status. This is useful for propagating status values from an
+ * existing object to a new #cairo_pattern_t.
+ *
+ * Return value: a (solid, black) #cairo_pattern_t object with status
+ * of @status. If there is insufficient memory a pointer to a special,
+ * static cairo_solid_pattern_nil will be returned instead with a
+ * status of CAIRO_STATUS_NO_MEMORY rather than @status.
+ * 
+ * Return value: 
+ **/
+cairo_pattern_t *
+_cairo_pattern_create_in_error (cairo_status_t status)
+{
+    cairo_solid_pattern_t *pattern;
+
+    pattern = malloc (sizeof (cairo_solid_pattern_t));
+    if (pattern == NULL)
+	return (cairo_pattern_t *) &cairo_solid_pattern_nil.base;
+
+    _cairo_pattern_init_solid (pattern, CAIRO_COLOR_BLACK);
+
+    pattern->base.status = status;
+
+    return &pattern->base;
+}
+
 cairo_pattern_t *
 cairo_pattern_create_for_surface (cairo_surface_t *surface)
 {

src/cairo.c

@@ -481,10 +481,8 @@ cairo_pattern_t *
 cairo_get_source (cairo_t *cr)
 {
     CAIRO_CHECK_SANITY (cr);
-    /* XXX: We'll want to do something like this:
     if (cr->status)
-	return cairo_pattern_nil;
-    */
+	return _cairo_pattern_create_in_error (cr->status);
 
     return _cairo_gstate_get_source (cr->gstate);
 }

src/cairoint.h

@@ -1717,6 +1717,9 @@ _cairo_pattern_fini (cairo_pattern_t *pattern);
 cairo_private cairo_pattern_t *
 _cairo_pattern_create_solid (const cairo_color_t *color);
 
+cairo_pattern_t *
+_cairo_pattern_create_in_error (cairo_status_t status);
+
 cairo_private void
 _cairo_pattern_transform (cairo_pattern_t      *pattern,
 			  const cairo_matrix_t *ctm_inverse);