Use DPI from Print Preview on Windows, handle non square

printing/print_settings_conversion.cc

 // Copyright 2014 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 "printing/print_settings_conversion.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <cmath>
@@ skipping 171 matching lines @@
   if (!job_settings.GetBoolean(kSettingCollate, &collate) ||
       !job_settings.GetInteger(kSettingCopies, &copies) ||
       !job_settings.GetInteger(kSettingColor, &color) ||
       !job_settings.GetInteger(kSettingDuplexMode, &duplex_mode) ||
       !job_settings.GetBoolean(kSettingLandscape, &landscape) ||
       !job_settings.GetString(kSettingDeviceName, &device_name) ||
       !job_settings.GetInteger(kSettingScaleFactor, &scale_factor) ||
       !job_settings.GetBoolean(kSettingRasterizePdf, &rasterize_pdf)) {
     return false;
   }
+#if defined(OS_WIN)
+  int dpi_horizontal = 0;
+  int dpi_vertical = 0;
+  if (!job_settings.GetInteger(kSettingDpiHorizontal, &dpi_horizontal) ||
+      !job_settings.GetInteger(kSettingDpiVertical, &dpi_vertical)) {
+    return false;
+  }
+#endif
 
   settings->set_collate(collate);
   settings->set_copies(copies);
   settings->SetOrientation(landscape);
   settings->set_device_name(device_name);
   settings->set_duplex_mode(static_cast<DuplexMode>(duplex_mode));
   settings->set_color(static_cast<ColorModel>(color));
   settings->set_scale_factor(static_cast<double>(scale_factor) / 100.0);
   settings->set_rasterize_pdf(rasterize_pdf);
 #if defined(OS_WIN)
   // Modifiable implies HTML and not other formats like PDF.
   bool can_modify = false;
   if (job_settings.GetBoolean(kSettingPreviewModifiable, &can_modify))
     settings->set_print_text_with_gdi(can_modify);
+  settings->set_dpi_xy(dpi_horizontal, dpi_vertical);
 #endif
 
   return true;
 }
 
 void PrintSettingsToJobSettingsDebug(const PrintSettings& settings,
                                      base::DictionaryValue* job_settings) {
   job_settings->SetBoolean(kSettingHeaderFooterEnabled,
                            settings.display_header_footer());
   job_settings->SetString(kSettingHeaderFooterTitle, settings.title());
@@ skipping 37 matching lines @@
   const PageSetup& page_setup = settings.page_setup_device_units();
   SetMarginsToJobSettings(
       "effective_margins", page_setup.effective_margins(), debug);
   SetSizeToJobSettings("physical_size", page_setup.physical_size(), debug);
   SetRectToJobSettings("overlay_area", page_setup.overlay_area(), debug);
   SetRectToJobSettings("content_area", page_setup.content_area(), debug);
   SetRectToJobSettings("printable_area", page_setup.printable_area(), debug);
 }
 
 }  // namespace printing