| // Copyright (c) 2011 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_initializer_win.h" |
| |
| #include <windows.h> |
| |
| #include "printing/backend/win_helper.h" |
| #include "printing/print_settings.h" |
| |
| namespace printing { |
| |
| namespace { |
| |
| bool HasEscapeSupport(HDC hdc, DWORD escape) { |
| const char* ptr = reinterpret_cast<const char*>(&escape); |
| return ExtEscape(hdc, QUERYESCSUPPORT, sizeof(escape), ptr, 0, nullptr) > 0; |
| } |
| |
| bool IsTechnology(HDC hdc, const char* technology) { |
| if (::GetDeviceCaps(hdc, TECHNOLOGY) != DT_RASPRINTER) |
| return false; |
| |
| if (!HasEscapeSupport(hdc, GETTECHNOLOGY)) |
| return false; |
| |
| char buf[256]; |
| memset(buf, 0, sizeof(buf)); |
| if (ExtEscape(hdc, GETTECHNOLOGY, 0, nullptr, sizeof(buf) - 1, buf) <= 0) |
| return false; |
| return strcmp(buf, technology) == 0; |
| } |
| |
| void SetPrinterToGdiMode(HDC hdc) { |
| // Try to set to GDI centric mode |
| DWORD mode = PSIDENT_GDICENTRIC; |
| const char* ptr = reinterpret_cast<const char*>(&mode); |
| ExtEscape(hdc, POSTSCRIPT_IDENTIFY, sizeof(DWORD), ptr, 0, nullptr); |
| } |
| |
| int GetPrinterPostScriptLevel(HDC hdc) { |
| constexpr int param = FEATURESETTING_PSLEVEL; |
| const char* param_char_ptr = reinterpret_cast<const char*>(¶m); |
| int param_out = 0; |
| char* param_out_char_ptr = reinterpret_cast<char*>(¶m_out); |
| if (ExtEscape(hdc, GET_PS_FEATURESETTING, sizeof(param), param_char_ptr, |
| sizeof(param_out), param_out_char_ptr) > 0) { |
| return param_out; |
| } |
| return 0; |
| } |
| |
| bool IsPrinterPostScript(HDC hdc, int* level) { |
| static constexpr char kPostScriptDriver[] = "PostScript"; |
| |
| // If printer does not support POSTSCRIPT_IDENTIFY, it cannot be set to GDI |
| // mode to check the language level supported. See if it looks like a |
| // postscript printer and supports the postscript functions that are |
| // supported in compatability mode. If so set to level 2 postscript. |
| if (!HasEscapeSupport(hdc, POSTSCRIPT_IDENTIFY)) { |
| if (!IsTechnology(hdc, kPostScriptDriver)) |
| return false; |
| if (!HasEscapeSupport(hdc, POSTSCRIPT_PASSTHROUGH) || |
| !HasEscapeSupport(hdc, POSTSCRIPT_DATA)) { |
| return false; |
| } |
| *level = 2; |
| return true; |
| } |
| |
| // Printer supports POSTSCRIPT_IDENTIFY so we can assume it has a postscript |
| // driver. Set the printer to GDI mode in order to query the postscript |
| // level. Use GDI mode instead of PostScript mode so that if level detection |
| // fails or returns language level < 2 we can fall back to normal printing. |
| // Note: This escape must be called before other escapes. |
| SetPrinterToGdiMode(hdc); |
| if (!HasEscapeSupport(hdc, GET_PS_FEATURESETTING)) { |
| // Can't query the level, use level 2 to be safe |
| *level = 2; |
| return true; |
| } |
| |
| // Get the language level. If invalid or < 2, return false to set printer to |
| // normal printing mode. |
| *level = GetPrinterPostScriptLevel(hdc); |
| return *level == 2 || *level == 3; |
| } |
| |
| bool IsPrinterXPS(HDC hdc) { |
| static constexpr char kXPSDriver[] = |
| "http://schemas.microsoft.com/xps/2005/06"; |
| return IsTechnology(hdc, kXPSDriver); |
| } |
| |
| bool IsPrinterTextOnly(HDC hdc) { |
| return ::GetDeviceCaps(hdc, TECHNOLOGY) == DT_CHARSTREAM; |
| } |
| } // namespace |
| |
| // static |
| void PrintSettingsInitializerWin::InitPrintSettings( |
| HDC hdc, |
| const DEVMODE& dev_mode, |
| PrintSettings* print_settings) { |
| DCHECK(hdc); |
| DCHECK(print_settings); |
| |
| print_settings->SetOrientation(dev_mode.dmOrientation == DMORIENT_LANDSCAPE); |
| int dpi_x = GetDeviceCaps(hdc, LOGPIXELSX); |
| int dpi_y = GetDeviceCaps(hdc, LOGPIXELSY); |
| print_settings->set_dpi_xy(dpi_x, dpi_y); |
| const int kAlphaCaps = SB_CONST_ALPHA | SB_PIXEL_ALPHA; |
| print_settings->set_supports_alpha_blend( |
| (GetDeviceCaps(hdc, SHADEBLENDCAPS) & kAlphaCaps) == kAlphaCaps); |
| |
| DCHECK_EQ(GetDeviceCaps(hdc, SCALINGFACTORX), 0); |
| DCHECK_EQ(GetDeviceCaps(hdc, SCALINGFACTORY), 0); |
| |
| // Initialize |page_setup_device_units_|. |
| // Blink doesn't support different dpi settings in X and Y axis. However, |
| // some printers use them. So, to avoid a bad page calculation, scale page |
| // size components based on the dpi in the appropriate dimension. |
| int dpi = print_settings->dpi(); |
| gfx::Size physical_size_device_units( |
| GetDeviceCaps(hdc, PHYSICALWIDTH) * dpi / dpi_x, |
| GetDeviceCaps(hdc, PHYSICALHEIGHT) * dpi / dpi_y); |
| gfx::Rect printable_area_device_units( |
| GetDeviceCaps(hdc, PHYSICALOFFSETX) * dpi / dpi_x, |
| GetDeviceCaps(hdc, PHYSICALOFFSETY) * dpi / dpi_y, |
| GetDeviceCaps(hdc, HORZRES) * dpi / dpi_x, |
| GetDeviceCaps(hdc, VERTRES) * dpi / dpi_y); |
| |
| // Sanity check the printable_area: we've seen crashes caused by a printable |
| // area rect of 0, 0, 0, 0, so it seems some drivers don't set it. |
| if (printable_area_device_units.IsEmpty() || |
| !gfx::Rect(physical_size_device_units) |
| .Contains(printable_area_device_units)) { |
| printable_area_device_units = gfx::Rect(physical_size_device_units); |
| } |
| DCHECK_EQ(print_settings->device_units_per_inch(), dpi); |
| print_settings->SetPrinterPrintableArea(physical_size_device_units, |
| printable_area_device_units, false); |
| |
| print_settings->set_color(IsDevModeWithColor(&dev_mode) ? COLOR : GRAY); |
| |
| // Check for postscript first so that we can change the mode with the |
| // first command. |
| int level; |
| if (IsPrinterPostScript(hdc, &level)) { |
| if (level == 2) { |
| print_settings->set_printer_type( |
| PrintSettings::PrinterType::TYPE_POSTSCRIPT_LEVEL2); |
| return; |
| } |
| DCHECK_EQ(3, level); |
| print_settings->set_printer_type( |
| PrintSettings::PrinterType::TYPE_POSTSCRIPT_LEVEL3); |
| return; |
| } |
| // Detects the generic / text only driver. |
| if (IsPrinterTextOnly(hdc)) { |
| print_settings->set_printer_type(PrintSettings::PrinterType::TYPE_TEXTONLY); |
| return; |
| } |
| if (IsPrinterXPS(hdc)) { |
| print_settings->set_printer_type(PrintSettings::PrinterType::TYPE_XPS); |
| return; |
| } |
| print_settings->set_printer_type(PrintSettings::PrinterType::TYPE_NONE); |
| } |
| |
| } // namespace printing |