GAIA Profile info prototype

chrome/browser/gaia_userinfo/image_decoder.h

+// Copyright (c) 2011 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 CHROME_BROWSER_GAIA_USERINFO_IMAGE_DECODER_H_
+#define CHROME_BROWSER_GAIA_USERINFO_IMAGE_DECODER_H_
+#pragma once
+
+#include <string>
+#include <vector>
+
+#include "content/browser/utility_process_host.h"
+
+class SkBitmap;
+
+// Decodes an image in a sandboxed process.
+class ImageDecoder : public UtilityProcessHost::Client {
+ public:
+  class Delegate {
+   public:
+    // Called when image is decoded.
+    // |decoder| is used to identify the image in case of decoding several
+    // images simultaneously.
+    virtual void OnImageDecoded(const ImageDecoder* decoder,
+                                const SkBitmap& decoded_image) = 0;
+
+    // Called when decoding image failed. Delegate can do some cleanup in
+    // this handler.
+    virtual void OnDecodeImageFailed(const ImageDecoder* decoder) {}
+
+   protected:
+    virtual ~Delegate() {}
+  };
+
+  ImageDecoder(Delegate* delegate,
+               const std::string& image_data);
+
+  // Starts image decoding.
+  void Start();
+
+ private:
+  // It's a reference counted object, so destructor is private.
+  virtual ~ImageDecoder();
+
+  // Overidden from UtilityProcessHost::Client:
+  virtual bool OnMessageReceived(const IPC::Message& message);
+
+  // IPC message handlers.
+  void OnDecodeImageSucceeded(const SkBitmap& decoded_image);
+  void OnDecodeImageFailed();
+
+  // Launches sandboxed process that will decode the image.
+  void DecodeImageInSandbox(const std::vector<unsigned char>& image_data);
+
+  Delegate* delegate_;
+  std::vector<unsigned char> image_data_;
+  content::BrowserThread::ID target_thread_id_;
+
+  DISALLOW_COPY_AND_ASSIGN(ImageDecoder);
+};
+
+#endif  // CHROME_BROWSER_GAIA_USERINFO_IMAGE_DECODER_H_