Add Sky framework support for drawing images

sky/engine/core/loader/NewImageLoader.cpp

+// Copyright 2015 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 "sky/engine/config.h"
+#include "sky/engine/core/loader/NewImageLoader.h"
+#include "sky/engine/platform/image-decoders/ImageDecoder.h"
+#include "sky/engine/platform/SharedBuffer.h"
+
+namespace blink {
+
+NewImageLoader::NewImageLoader(NewImageLoaderClient* client) : client_(client) {
+}
+
+NewImageLoader::~NewImageLoader() {
+}
+
+void NewImageLoader::Load(const KURL& src) {
+  fetcher_ = adoptPtr(new MojoFetcher(this, src));
+}
+
+void NewImageLoader::OnReceivedResponse(mojo::URLResponsePtr response) {
+  if (response->status_code != 200) {
+    client_->OnLoadFinished(SkBitmap());
+    return;
+  }
+  buffer_ = SharedBuffer::create();
+  drainer_ =
+      adoptPtr(new mojo::common::DataPipeDrainer(this, response->body.Pass()));
+}
+
+void NewImageLoader::OnDataAvailable(const void* data, size_t num_bytes) {
+  buffer_->append(static_cast<const char*>(data), num_bytes);
+}
+
+void NewImageLoader::OnDataComplete() {
+  SkBitmap bitmap;
+  OwnPtr<ImageDecoder> decoder =
+      ImageDecoder::create(*buffer_.get(), ImageSource::AlphaPremultiplied,
+                           ImageSource::GammaAndColorProfileIgnored);
+  decoder->setData(buffer_.get(), true);
+
+  if (decoder->failed()) {
+    client_->OnLoadFinished(bitmap);
+  } else {
+    if (decoder->frameCount() > 0) {
+      bitmap = decoder->frameBufferAtIndex(0)->getSkBitmap();
+    }
+    client_->OnLoadFinished(bitmap);
+  }
+}
+
+}  // namespace blink