arc: Support more types of notifications.

components/arc/bitmap/bitmap_type_converters.cc

Index: components/arc/bitmap/bitmap_type_converters.cc
diff --git a/components/arc/bitmap/bitmap_type_converters.cc b/components/arc/bitmap/bitmap_type_converters.cc
new file mode 100644
index 0000000000000000000000000000000000000000..ab9e58b3bf27554a3156320ac6b528b84fde7b49
--- /dev/null
+++ b/components/arc/bitmap/bitmap_type_converters.cc
@@ -0,0 +1,36 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "components/arc/bitmap/bitmap_type_converters.h"
+
+namespace mojo {
+
+SkBitmap TypeConverter<SkBitmap, arc::mojom::ArcBitmapPtr>::Convert(
+    const arc::mojom::ArcBitmapPtr& arcBitmap) {
+  if (arcBitmap.is_null())
+    return SkBitmap();
+
+  SkImageInfo info = SkImageInfo::Make(
+      arcBitmap->width, arcBitmap->height,
+      kRGBA_8888_SkColorType, kPremul_SkAlphaType);
+  if (info.getSafeSize(info.minRowBytes()) > arcBitmap->pixel_data.size())
+      return SkBitmap();
+
+  // Create the SkBitmap object which wraps the arc bitmap pixels.
+  SkBitmap bitmap;
+  if (!bitmap.installPixels(info,
+          const_cast<uint8_t*>(arcBitmap->pixel_data.storage().data()),
+          info.minRowBytes())) {
+    return SkBitmap();
+  }
+
+  // Copy the pixels with converting color type.
+  SkBitmap nativeColorBitmap;
+  if (!bitmap.copyTo(&nativeColorBitmap, kN32_SkColorType))
+    return SkBitmap();
+
+  return nativeColorBitmap;
+}
+
+}  // namespace mojo