Implement SkEncodeImage()

skia/ext/skia_encode_image.h

Index: skia/ext/skia_encode_image.h
diff --git a/skia/ext/skia_encode_image.h b/skia/ext/skia_encode_image.h
new file mode 100644
index 0000000000000000000000000000000000000000..06304f3557240be975a28dd854e8b91939d4ea35
--- /dev/null
+++ b/skia/ext/skia_encode_image.h
@@ -0,0 +1,25 @@
+// Copyright (c) 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.
+
+#ifndef SKIA_EXT_SKIA_ENCODE_IMAGE_H
+#define SKIA_EXT_SKIA_ENCODE_IMAGE_H
+
+#include "third_party/skia/include/core/SkEncodedImageFormat.h"
+#include "third_party/skia/include/core/SkTypes.h"
+
+class SkPixmap;
+class SkWStream;
+
+namespace skia {
+
+typedef bool (*ImageEncoder)(SkWStream*,
+                             const SkPixmap&,
+                             SkEncodedImageFormat,
+                             int quality);

[dcheng, 2016/12/20 19:40:47]

Prefer using A = B over typedef B A in new code.

Also, I'd suffix this with "Function" and not include the pointer explicitly, so
it's clear from the function signature that we're passing a function pointer,
i.e. something like:
SK_API void SetImageEncoder(ImageEncoderFunction*);

[hal.canary, 2016/12/20 20:45:08]

Done.

+
+SK_API void SetImageEncoder(ImageEncoder);
+
+}  // namespace skia
+
+#endif  // SKIA_EXT_SKIA_ENCODE_IMAGE_H