setDrawFilter needs to trigger any deferred saves
BUG=skia:
TBR=
Review URL: https://codereview.chromium.org/1077353002
diff --git a/tests/DrawFilterTest.cpp b/tests/DrawFilterTest.cpp
new file mode 100644
index 0000000..d01fa07
--- /dev/null
+++ b/tests/DrawFilterTest.cpp
@@ -0,0 +1,44 @@
+/*
+ * Copyright 2015 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "SkCanvas.h"
+#include "SkDrawFilter.h"
+#include "SkSurface.h"
+#include "Test.h"
+
+class TestFilter : public SkDrawFilter {
+public:
+ bool filter(SkPaint* p, Type) override {
+ return true;
+ }
+};
+
+/**
+ * canvas.setDrawFilter is defined to be local to the save/restore block, such that if you
+ * do the following: save / modify-drawfilter / restore, the current drawfilter should be what
+ * it was before the save.
+ */
+static void test_saverestore(skiatest::Reporter* reporter) {
+ SkAutoTUnref<SkSurface> surface(SkSurface::NewRasterN32Premul(10, 10));
+ SkCanvas* canvas = surface->getCanvas();
+
+
+ SkAutoTUnref<TestFilter> df(SkNEW(TestFilter));
+
+ REPORTER_ASSERT(reporter, NULL == canvas->getDrawFilter());
+
+ canvas->save();
+ canvas->setDrawFilter(df);
+ REPORTER_ASSERT(reporter, NULL != canvas->getDrawFilter());
+ canvas->restore();
+
+ REPORTER_ASSERT(reporter, NULL == canvas->getDrawFilter());
+}
+
+DEF_TEST(DrawFilter, reporter) {
+ test_saverestore(reporter);
+}