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 PrintSettings* print_settings) { 18 DCHECK(hdc); 19 DCHECK(print_settings); 20 print_settings->SetOrientation(dev_mode.dmOrientation == DMORIENT_LANDSCAPE); 21 22 int dpi = GetDeviceCaps(hdc, LOGPIXELSX); 23 print_settings->set_dpi(dpi); 24 const int kAlphaCaps = SB_CONST_ALPHA | SB_PIXEL_ALPHA; 25 print_settings->set_supports_alpha_blend( 26 (GetDeviceCaps(hdc, SHADEBLENDCAPS) & kAlphaCaps) == kAlphaCaps); 27 // No printer device is known to advertise different dpi in X and Y axis; even 28 // the fax device using the 200x100 dpi setting. It's ought to break so many 29 // applications that it's not even needed to care about. WebKit doesn't 30 // support different dpi settings in X and Y axis. 31 DCHECK_EQ(dpi, GetDeviceCaps(hdc, LOGPIXELSY)); 32 33 DCHECK_EQ(GetDeviceCaps(hdc, SCALINGFACTORX), 0); 34 DCHECK_EQ(GetDeviceCaps(hdc, SCALINGFACTORY), 0); 35 36 // Initialize page_setup_device_units_. 37 gfx::Size physical_size_device_units(GetDeviceCaps(hdc, PHYSICALWIDTH), 38 GetDeviceCaps(hdc, PHYSICALHEIGHT)); 39 gfx::Rect printable_area_device_units(GetDeviceCaps(hdc, PHYSICALOFFSETX), 40 GetDeviceCaps(hdc, PHYSICALOFFSETY), 41 GetDeviceCaps(hdc, HORZRES), 42 GetDeviceCaps(hdc, VERTRES)); 43 44 // Sanity check the printable_area: we've seen crashes caused by a printable 45 // area rect of 0, 0, 0, 0, so it seems some drivers don't set it. 46 if (printable_area_device_units.IsEmpty() || 47 !gfx::Rect(physical_size_device_units).Contains( 48 printable_area_device_units)) { 49 printable_area_device_units = gfx::Rect(physical_size_device_units); 50 } 51 DCHECK_EQ(print_settings->device_units_per_inch(), dpi); 52 print_settings->SetPrinterPrintableArea(physical_size_device_units, 53 printable_area_device_units, 54 false); 55 } 56 57 } // namespace printing 58
