printing/print_settings_initializer_win.cc

   1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "printing/print_settings_initializer_win.h"
   6
   7 #include <windows.h>
   8
   9 #include "printing/print_settings.h"
  10
  11 namespace printing {
  12
  13 // static
  14 void PrintSettingsInitializerWin::InitPrintSettings(
  15     HDC hdc,
  16     const DEVMODE& dev_mode,
  17     const PageRanges& new_ranges,
  18     const std::wstring& new_device_name,
  19     bool print_selection_only,
  20     PrintSettings* print_settings) {
  21   DCHECK(hdc);
  22   DCHECK(print_settings);
  23
  24   print_settings->set_printer_name(dev_mode.dmDeviceName);
  25   print_settings->set_device_name(new_device_name);
  26   print_settings->ranges = const_cast<PageRanges&>(new_ranges);
  27   print_settings->set_landscape(dev_mode.dmOrientation == DMORIENT_LANDSCAPE);
  28   print_settings->selection_only = print_selection_only;
  29
  30   int dpi = GetDeviceCaps(hdc, LOGPIXELSX);
  31   print_settings->set_dpi(dpi);
  32   const int kAlphaCaps = SB_CONST_ALPHA | SB_PIXEL_ALPHA;
  33   print_settings->set_supports_alpha_blend(
  34     (GetDeviceCaps(hdc, SHADEBLENDCAPS) & kAlphaCaps) == kAlphaCaps);
  35   // No printer device is known to advertise different dpi in X and Y axis; even
  36   // the fax device using the 200x100 dpi setting. It's ought to break so many
  37   // applications that it's not even needed to care about. WebKit doesn't
  38   // support different dpi settings in X and Y axis.
  39   DCHECK_EQ(dpi, GetDeviceCaps(hdc, LOGPIXELSY));
  40
  41   DCHECK_EQ(GetDeviceCaps(hdc, SCALINGFACTORX), 0);
  42   DCHECK_EQ(GetDeviceCaps(hdc, SCALINGFACTORY), 0);
  43
  44   // Initialize page_setup_device_units_.
  45   gfx::Size physical_size_device_units(GetDeviceCaps(hdc, PHYSICALWIDTH),
  46                                        GetDeviceCaps(hdc, PHYSICALHEIGHT));
  47   gfx::Rect printable_area_device_units(GetDeviceCaps(hdc, PHYSICALOFFSETX),
  48                                         GetDeviceCaps(hdc, PHYSICALOFFSETY),
  49                                         GetDeviceCaps(hdc, HORZRES),
  50                                         GetDeviceCaps(hdc, VERTRES));
  51
  52   // Sanity check the printable_area: we've seen crashes caused by a printable
  53   // area rect of 0, 0, 0, 0, so it seems some drivers don't set it.
  54   if (printable_area_device_units.IsEmpty() ||
  55       !gfx::Rect(physical_size_device_units).Contains(
  56           printable_area_device_units)) {
  57     printable_area_device_units = gfx::Rect(physical_size_device_units);
  58   }
  59
  60   print_settings->SetPrinterPrintableArea(physical_size_device_units,
  61                                           printable_area_device_units,
  62                                           dpi);
  63 }
  64
  65 }  // namespace printing