Print Preview: Add option to rasterize PDFs and add JPEG compression.

components/printing/renderer/print_web_view_helper.cc

 // Copyright (c) 2012 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 "components/printing/renderer/print_web_view_helper.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 267 matching lines @@
   page_params->printable_area.set_size(
       gfx::Size(page_params->printable_area.height(),
                 page_params->printable_area.width()));
 }
 
 void ComputeWebKitPrintParamsInDesiredDpi(
     const PrintMsg_Print_Params& print_params,
     blink::WebPrintParams* webkit_print_params) {
   int dpi = GetDPI(&print_params);
   webkit_print_params->printerDPI = dpi;
+  webkit_print_params->rasterizePDF = print_params.rasterize_pdf;
   webkit_print_params->printScalingOption = print_params.print_scaling_option;
 
   webkit_print_params->printContentArea.width = ConvertUnit(
       print_params.content_size.width(), dpi, print_params.desired_dpi);
   webkit_print_params->printContentArea.height = ConvertUnit(
       print_params.content_size.height(), dpi, print_params.desired_dpi);
 
   webkit_print_params->printableArea.x = ConvertUnit(
       print_params.printable_area.x(), dpi, print_params.desired_dpi);
   webkit_print_params->printableArea.y = ConvertUnit(
@@ skipping 1419 matching lines @@
   } else {
     source_is_html = !PrintingNodeOrPdfFrame(frame, node);
   }
 
   if (print_for_preview_ || !source_is_html) {
     modified_job_settings.MergeDictionary(job_settings);
     modified_job_settings.SetBoolean(kSettingHeaderFooterEnabled, false);
     modified_job_settings.SetInteger(kSettingMarginsType, NO_MARGINS);
     job_settings = &modified_job_settings;
   }
+  bool raster = false;
+  job_settings->GetBoolean(kSettingRasterizePdf, &raster);

[Vitaly Buka (NO REVIEWS), 2016/12/15 08:27:34]

value is not used?

[rbpotter, 2016/12/16 00:06:31]

Done.

 
   // Send the cookie so that UpdatePrintSettings can reuse PrinterQuery when
   // possible.
   int cookie =
       print_pages_params_ ? print_pages_params_->params.document_cookie : 0;
   PrintMsg_PrintPages_Params settings;
   bool canceled = false;
   Send(new PrintHostMsg_UpdatePrintSettings(routing_id(), cookie, *job_settings,
                                             &settings, &canceled));
   if (canceled) {
@@ skipping 605 matching lines @@
       blink::WebConsoleMessage::LevelWarning, message));
   return false;
 }
 
 void PrintWebViewHelper::ScriptingThrottler::Reset() {
   // Reset counter on successful print.
   count_ = 0;
 }
 
 }  // namespace printing