importer: Pull Importer class out on its own header file.

BUG=None
TEST=None

Review URL: http://codereview.chromium.org/6648030

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@77543 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 50 insertions, 0 deletions

diff --git a/chrome/browser/importer/importer.cc b/chrome/browser/importer/importer.cc
new file mode 100644
index 0000000..74b2416
--- /dev/null
+++ b/chrome/browser/importer/importer.cc
@@ -0,0 +1,50 @@
+// 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.
+
+#include "chrome/browser/importer/importer.h"
+
+#include "chrome/browser/importer/importer_bridge.h"
+#include "chrome/browser/importer/importer_data_types.h"
+#include "skia/ext/image_operations.h"
+#include "third_party/skia/include/core/SkBitmap.h"
+#include "ui/gfx/codec/png_codec.h"
+#include "ui/gfx/favicon_size.h"
+#include "webkit/glue/image_decoder.h"
+
+void Importer::Cancel() {
+  cancelled_ = true;
+}
+
+Importer::Importer()
+    : import_to_bookmark_bar_(false),
+      bookmark_bar_disabled_(false),
+      cancelled_(false) {
+}
+
+Importer::~Importer() {
+}
+
+// static
+bool Importer::ReencodeFavicon(const unsigned char* src_data,
+                               size_t src_len,
+                               std::vector<unsigned char>* png_data) {
+  // Decode the favicon using WebKit's image decoder.
+  webkit_glue::ImageDecoder decoder(gfx::Size(kFavIconSize, kFavIconSize));
+  SkBitmap decoded = decoder.Decode(src_data, src_len);
+  if (decoded.empty())
+    return false;  // Unable to decode.
+
+  if (decoded.width() != kFavIconSize || decoded.height() != kFavIconSize) {
+    // The bitmap is not the correct size, re-sample.
+    int new_width = decoded.width();
+    int new_height = decoded.height();
+    calc_favicon_target_size(&new_width, &new_height);
+    decoded = skia::ImageOperations::Resize(
+        decoded, skia::ImageOperations::RESIZE_LANCZOS3, new_width, new_height);
+  }
+
+  // Encode our bitmap as a PNG.
+  gfx::PNGCodec::EncodeBGRASkBitmap(decoded, false, png_data);
+  return true;
+}