Introduce the image_decoder service

services/image_decoder/public/cpp/decode.h

+// 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.
+
+#ifndef SERVICES_IMAGE_DECODER_PUBLIC_CPP_DECODE_H_
+#define SERVICES_IMAGE_DECODER_PUBLIC_CPP_DECODE_H_
+
+#include <stdint.h>
+
+#include <vector>
+
+#include "services/image_decoder/public/interfaces/image_decoder.mojom.h"
+
+namespace service_manager {
+class Connector;
+}
+
+namespace image_decoder {
+
+const uint64_t kDefaultMaxSizeInBytes = 128 * 1024 * 1024;
+
+// Helper function to decode an image via the image_decoder service. Upon
+// completion, |callback| is invoked on the calling thread TaskRunner with an
+// SkBitmap argument. The SkBitmap will be null on failure and non-null on
+// success.
+void Decode(service_manager::Connector* connector,
+            const std::vector<uint8_t>& encoded_bytes,
+            mojom::ImageCodec codec,
+            bool shrink_to_fit,
+            uint64_t max_size_in_bytes,
+            const mojom::ImageDecoder::DecodeImageCallback& callback);
+
+}  // namespace image_decoder
+
+#endif  // SERVICES_IMAGE_DECODER_PUBLIC_CPP_DECODE_H_