Implement getTransparentRegion() using SkLatticeIter

This allows us to delete utils/NinePatchImpl.cpp and
utils/NinePatch.h

Test: Passed cts tests - DrawableTest, NinePatchTest,
NinePatchDrawableTest.

Change-Id: I6b5d09fa3479e758d8b931fa0e977c25f4435a7c

1 files changed, 38 insertions, 0 deletions

diff --git a/libs/hwui/NinePatchUtils.h b/libs/hwui/NinePatchUtils.h
new file mode 100644
index 000000000000..7a271b7ce03a
--- /dev/null
+++ b/libs/hwui/NinePatchUtils.h
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+namespace android {
+namespace NinePatchUtils {
+
+static inline void SetLatticeDivs(SkCanvas::Lattice* lattice, const Res_png_9patch& chunk,
+        int width, int height) {
+    lattice->fXCount = chunk.numXDivs;
+    lattice->fYCount = chunk.numYDivs;
+    lattice->fXDivs = chunk.getXDivs();
+    lattice->fYDivs = chunk.getYDivs();
+
+    // We'll often see ninepatches where the last div is equal to the width or height.
+    // This doesn't provide any additional information and is not supported by Skia.
+    if (lattice->fXCount > 0 && width == lattice->fXDivs[lattice->fXCount - 1]) {
+        lattice->fXCount--;
+    }
+    if (lattice->fYCount > 0 && height == lattice->fYDivs[lattice->fYCount - 1]) {
+        lattice->fYCount--;
+    }
+}
+
+}; // namespace NinePatchUtils
+}; // namespace android