Add SkPaint::getHash().
BUG=skia:
Review URL: https://codereview.chromium.org/637583002
diff --git a/tests/PaintTest.cpp b/tests/PaintTest.cpp
index cbb5dad..9b49ec1 100644
--- a/tests/PaintTest.cpp
+++ b/tests/PaintTest.cpp
@@ -343,3 +343,29 @@
ASSERT(paint.getXfermode()->asMode(&paintMode));
ASSERT(otherMode == paintMode);
}
+
+DEF_TEST(Paint_getHash, r) {
+ // Try not to inspect the actual hash values in here.
+ // We might want to change the hash function.
+
+ SkPaint paint;
+ const uint32_t defaultHash = paint.getHash();
+
+ // Check that some arbitrary field affects the hash.
+ paint.setColor(0xFF00FF00);
+ REPORTER_ASSERT(r, paint.getHash() != defaultHash);
+ paint.setColor(SK_ColorBLACK); // Reset to default value.
+ REPORTER_ASSERT(r, paint.getHash() == defaultHash);
+
+ // SkTypeface is the first field we hash, so test it specially.
+ paint.setTypeface(SkTypeface::RefDefault())->unref();
+ REPORTER_ASSERT(r, paint.getHash() != defaultHash);
+ paint.setTypeface(NULL);
+ REPORTER_ASSERT(r, paint.getHash() == defaultHash);
+
+ // This is part of fBitfields, the last field we hash.
+ paint.setHinting(SkPaint::kSlight_Hinting);
+ REPORTER_ASSERT(r, paint.getHash() != defaultHash);
+ paint.setHinting(SkPaint::kNormal_Hinting);
+ REPORTER_ASSERT(r, paint.getHash() == defaultHash);
+}