Add Postscript Printing

printing/print_settings_initializer_win.cc

 // 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/print_settings.h"
 
@@ skipping 13 matching lines @@
   if (!HasEscapeSupprt(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;
 }
 
+bool IsPrinterPostScript(HDC hdc, int* level) {
+  static constexpr char kPostScriptDriver[] = "PostScript";
+  if (!IsTechnology(hdc, kPostScriptDriver)) {
+    return false;
+  }
+
+  // Query the PS Level if possible. Many PS printers do not implement this.
+  if (HasEscapeSupprt(hdc, GET_PS_FEATURESETTING)) {
+    constexpr int param = FEATURESETTING_PSLEVEL;
+    const char* param_char_ptr = reinterpret_cast<const char*>(&param);
+    int param_out = -1;
+    char* param_out_char_ptr = reinterpret_cast<char*>(&param_out);
+    if (ExtEscape(hdc, GET_PS_FEATURESETTING, sizeof(param), param_char_ptr,
+                  sizeof(param_out), param_out_char_ptr) > 0) {
+      if (param_out < 2 || param_out > 3)
+        return false;
+
+      *level = param_out;
+      return true;
+    }
+  }
+
+  // If it looks like a PS printer.
+  if (HasEscapeSupprt(hdc, POSTSCRIPT_PASSTHROUGH) &&
+      HasEscapeSupprt(hdc, POSTSCRIPT_DATA)) {
+    *level = 2;
+    return true;
+  }
+
+  return false;
+}
+
 bool IsPrinterXPS(HDC hdc) {
   static constexpr char kXPSDriver[] =
       "http://schemas.microsoft.com/xps/2005/06";
   return IsTechnology(hdc, kXPSDriver);
 }
 
 }  // namespace
 
 // static
 void PrintSettingsInitializerWin::InitPrintSettings(
@@ skipping 35 matching lines @@
       !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_printer_is_xps(IsPrinterXPS(hdc));
+  if (!print_settings->printer_is_xps()) {
+    int level;
+    if (IsPrinterPostScript(hdc, &level)) {
+      if (level == 2) {
+        print_settings->set_printer_is_ps2(true);

[Vitaly Buka (NO REVIEWS), 2017/01/27 00:38:49]

Looks like printer_is* flags exclusive
probably cleaner to replace all 3 with enum

[rbpotter, 2017/01/27 16:37:21]

Done.

+      } else {
+        DCHECK_EQ(3, level);
+        print_settings->set_printer_is_ps3(true);
+      }
+    }
+  }
 }
 
 }  // namespace printing