Move SkBitmapRegionDecoder to include/android and src/android

This will expose the BitmapRegionDecoder API as a public include
and move the implementation to src.

This makes this code more naturally exposed in Android and easier
to test in DM and nanobench.

BUG=skia:

Review URL: https://codereview.chromium.org/1438873002

1 files changed, 37 insertions, 0 deletions

diff --git a/src/android/SkBitmapRegionCodec.h b/src/android/SkBitmapRegionCodec.h
new file mode 100644
index 0000000000..79774173b0
--- /dev/null
+++ b/src/android/SkBitmapRegionCodec.h
@@ -0,0 +1,37 @@
+/*
+ * 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 "SkBitmap.h"
+#include "SkBitmapRegionDecoder.h"
+#include "SkAndroidCodec.h"
+
+/*
+ * This class implements SkBitmapRegionDecoder using an SkAndroidCodec.
+ */
+class SkBitmapRegionCodec : public SkBitmapRegionDecoder {
+public:
+
+    /*
+     * Takes ownership of pointer to codec
+     */
+    SkBitmapRegionCodec(SkAndroidCodec* codec);
+
+    bool decodeRegion(SkBitmap* bitmap, SkBRDAllocator* allocator,
+                      const SkIRect& desiredSubset, int sampleSize,
+                      SkColorType colorType, bool requireUnpremul) override;
+
+    bool conversionSupported(SkColorType colorType) override;
+
+    SkEncodedFormat getEncodedFormat() override { return fCodec->getEncodedFormat(); }
+
+private:
+
+    SkAutoTDelete<SkAndroidCodec> fCodec;
+
+    typedef SkBitmapRegionDecoder INHERITED;
+
+};