remove legacy filter-flags, and store FilterLevel directly

tests/PaintTest.cpp

Index: tests/PaintTest.cpp
diff --git a/tests/PaintTest.cpp b/tests/PaintTest.cpp
index c41e23ac54630e5844710f6427a7a8c1671bb208..70084e7d498f2953d0bfe37c7b6710304806c6ce 100644
--- a/tests/PaintTest.cpp
+++ b/tests/PaintTest.cpp
@@ -228,6 +228,43 @@ DEF_TEST(Paint_regression_cubic, reporter) {
     REPORTER_ASSERT(reporter, maxR.contains(strokeR));
 }
 
+static void test_filter_flags(skiatest::Reporter* reporter) {
+    const SkPaint::FilterLevel levels[] = {
+        SkPaint::kNone_FilterLevel,
+        SkPaint::kLow_FilterLevel,
+        SkPaint::kMedium_FilterLevel,
+        SkPaint::kHigh_FilterLevel,
+    };
+
+    const SkPaint::Hinting hinting[] = {
+        SkPaint::kNo_Hinting,
+        SkPaint::kSlight_Hinting,
+        SkPaint::kNormal_Hinting,
+        SkPaint::kFull_Hinting,
+    };
+
+    for (size_t i = 0; i < SK_ARRAY_COUNT(levels); ++i) {
+        for (size_t j = 0; j < SK_ARRAY_COUNT(hinting); ++j) {
+            SkPaint paint;
+            paint.setFilterLevel(levels[i]);
+            paint.setHinting(hinting[j]);
+            REPORTER_ASSERT(reporter, paint.getFilterLevel() == levels[i]);
+            REPORTER_ASSERT(reporter, paint.getHinting() == hinting[j]);
+
+            SkWriteBuffer writer;
+            paint.flatten(writer);
+
+            const uint32_t* written = writer.getWriter32()->contiguousArray();
+            SkReadBuffer reader(written, writer.bytesWritten());
+            
+            SkPaint paint2;
+            paint2.unflatten(reader);
+            REPORTER_ASSERT(reporter, paint2.getFilterLevel() == levels[i]);
+            REPORTER_ASSERT(reporter, paint2.getHinting() == hinting[j]);
+        }
+    }
+}
+
 // found and fixed for android: not initializing rect for string's of length 0
 DEF_TEST(Paint_regression_measureText, reporter) {
 
@@ -277,4 +314,6 @@ DEF_TEST(Paint_FlatteningTraits, r) {
     ASSERT(other.getXfermode()->asMode(&otherMode));
     ASSERT(paint.getXfermode()->asMode(&paintMode));
     ASSERT(otherMode == paintMode);
+
+    test_filter_flags(r);
 }