printing/print_destination_win.cc

   1 // Copyright (c) 2012 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_destination_interface.h"
   6
   7 #include "base/safe_numerics.h"
   8 #include "base/win/metro.h"
   9 #include "win8/util/win8_util.h"
  10
  11 namespace printing {
  12
  13 class PrintDestinationWin : public PrintDestinationInterface {
  14  public:
  15   PrintDestinationWin()
  16       : metro_set_print_page_count_(NULL),
  17         metro_set_print_page_content_(NULL) {
  18     HMODULE metro_module = base::win::GetMetroModule();
  19     if (metro_module != NULL) {
  20       metro_set_print_page_count_ =
  21           reinterpret_cast<MetroSetPrintPageCount>(
  22               ::GetProcAddress(metro_module, "MetroSetPrintPageCount"));
  23       metro_set_print_page_content_ =
  24           reinterpret_cast<MetroSetPrintPageContent>(
  25               ::GetProcAddress(metro_module, "MetroSetPrintPageContent"));
  26     }
  27   }
  28   virtual void SetPageCount(int page_count) {
  29     if (metro_set_print_page_count_)
  30       metro_set_print_page_count_(page_count);
  31   }
  32
  33   virtual void SetPageContent(int page_number,
  34                               void* content,
  35                               size_t content_size) {
  36     if (metro_set_print_page_content_)
  37       metro_set_print_page_content_(page_number - 1, content,
  38           base::checked_numeric_cast<UINT32>(content_size));
  39   }
  40  private:
  41   typedef void (*MetroSetPrintPageCount)(INT);
  42   typedef void (*MetroSetPrintPageContent)(INT, VOID*, UINT32);
  43   MetroSetPrintPageCount metro_set_print_page_count_;
  44   MetroSetPrintPageContent metro_set_print_page_content_;
  45 };
  46
  47 PrintDestinationInterface* CreatePrintDestination() {
  48   // We currently only support the Metro print destination.
  49   if (win8::IsSingleWindowMetroMode())
  50     return new PrintDestinationWin;
  51   else
  52     return NULL;
  53 }
  54
  55 }  // namespace printing