Implement PrintPageAsJPEG feature for Print Preview.In order to show the tab contents to the print tab, the renderer should print the page as a JPEG image so it could be rendered in the DOMUI. A unit test case has been created to make sure the image contains something from deciding whether its not 100% white.MockPrinter has been altered to remove the const parameter, since its useful to retrieve the DefaultSettings not via IPC.BUG=173 (http://crbug.com/173)TEST=created a unit test and ran it.

Review URL: http://codereview.chromium.org/196021

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@25445 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 8 insertions, 0 deletions

diff --git a/chrome/renderer/print_web_view_helper.h b/chrome/renderer/print_web_view_helper.h
index 0c2f0ff..406c807 100644
--- a/chrome/renderer/print_web_view_helper.h
+++ b/chrome/renderer/print_web_view_helper.h
@@ -75,6 +75,14 @@ class PrintWebViewHelper : public WebViewDelegate {
   // Notification when printing is done - signal teardown
   void DidFinishPrinting(bool success);
 
+  // Prints the page listed in |params| as a JPEG image. The width and height of
+  // the image will scale propotionally given the |zoom_factor| multiplier. The
+  // encoded JPEG data will be written into the supplied vector |image_data|.
+  void PrintPageAsJPEG(const ViewMsg_PrintPage_Params& params,
+                       WebKit::WebFrame* frame,
+                       float zoom_factor,
+                       std::vector<unsigned char>* image_data);
+
  protected:
   bool CopyAndPrint(const ViewMsg_PrintPages_Params& params,
                     WebKit::WebFrame* web_frame);