Print support for Windows Metro...

printing/print_destination_win.cc

+// Copyright (c) 2012 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_destination_interface.h"
+
+#include "base/win/metro.h"
+
+namespace printing {
+
+class PrintDestinationWin : public PrintDestinationInterface {
+ public:
+  PrintDestinationWin()
+      : metro_set_print_page_count_(NULL),
+        metro_set_print_page_content_(NULL) {
+    HMODULE metro_module = base::win::GetMetroModule();
+    if (metro_module != NULL) {
+      metro_set_print_page_count_ =
+          reinterpret_cast<MetroSetPrintPageCount>(
+              ::GetProcAddress(metro_module, "MetroSetPrintPageCount"));
+      metro_set_print_page_content_ =
+          reinterpret_cast<MetroSetPrintPageContent>(
+              ::GetProcAddress(metro_module, "MetroSetPrintPageContent"));
+    }
+  }
+  virtual void SetPageCount(int page_count) {
+    if (metro_set_print_page_count_)
+      metro_set_print_page_count_(page_count);
+  }
+
+  virtual void SetPageContent(int page_number,
+                              void* content,
+                              size_t content_size) {
+    if (metro_set_print_page_content_)
+      metro_set_print_page_content_(page_number - 1, content, content_size);
+  }
+ private:
+  typedef void (*MetroSetPrintPageCount)(INT);
+  typedef void (*MetroSetPrintPageContent)(INT, VOID*, UINT32);
+  MetroSetPrintPageCount metro_set_print_page_count_;
+  MetroSetPrintPageContent metro_set_print_page_content_;
+};
+
+PrintDestinationInterface* CreatePrintDestination() {
+  // We currently only support the Metro print destination.
+  if (base::win::IsMetroProcess())
+    return new PrintDestinationWin;
+  else
+    return NULL;
+}
+
+}  // namespace printing