Printing on Windows via PDF

chrome/renderer/printing/print_web_view_helper_pdf_win.cc

Index: chrome/renderer/printing/print_web_view_helper_pdf_win.cc
diff --git a/chrome/renderer/printing/print_web_view_helper_linux.cc b/chrome/renderer/printing/print_web_view_helper_pdf_win.cc
similarity index 76%
copy from chrome/renderer/printing/print_web_view_helper_linux.cc
copy to chrome/renderer/printing/print_web_view_helper_pdf_win.cc
index 721dd973b3299de0618a4057dbbe853518b0c7d6..62b87dc4b0743bdec317ab427abbaecc7fd513c9 100644
--- a/chrome/renderer/printing/print_web_view_helper_linux.cc
+++ b/chrome/renderer/printing/print_web_view_helper_pdf_win.cc
@@ -1,11 +1,15 @@
-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Copyright 2014 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 "chrome/renderer/printing/print_web_view_helper.h"
 
+// XXX TODO in .gyp instead
+#if defined(PRINTING_WIN_USES_PDF_AS_METAFILE)
+
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/process/process_handle.h"
 #include "chrome/common/print_messages.h"
 #include "content/public/renderer/render_thread.h"
 #include "printing/metafile.h"
@@ -16,11 +20,6 @@
 #include "skia/ext/vector_canvas.h"
 #include "third_party/WebKit/public/web/WebLocalFrame.h"
 
-#if !defined(OS_CHROMEOS) && !defined(OS_ANDROID)
-#include "base/process/process_handle.h"
-#else
-#include "base/file_descriptor_posix.h"
-#endif  // !defined(OS_CHROMEOS) && !defined(OS_ANDROID)
 
 namespace printing {
 
@@ -99,53 +98,42 @@ bool PrintWebViewHelper::PrintPagesNative(blink::WebFrame* frame,
   uint32 buf_size = metafile.GetDataSize();
   DCHECK_GT(buf_size, 0u);
 
-#if defined(OS_CHROMEOS) || defined(OS_ANDROID)
-  int sequence_number = -1;
-  base::FileDescriptor fd;
-
-  // Ask the browser to open a file for us.
-  Send(new PrintHostMsg_AllocateTempFileForPrinting(routing_id(),
-                                                    &fd,
-                                                    &sequence_number));
-  if (!metafile.SaveToFD(fd))
-    return false;
-
-  // Tell the browser we've finished writing the file.
-  Send(new PrintHostMsg_TempFileForPrintingWritten(routing_id(),
-                                                   sequence_number));
-  return true;
-#else
   PrintHostMsg_DidPrintPage_Params printed_page_params;
   printed_page_params.data_size = 0;
   printed_page_params.document_cookie = params.params.document_cookie;
 
   {
-    scoped_ptr<base::SharedMemory> shared_mem(
-        content::RenderThread::Get()->HostAllocateSharedMemoryBuffer(
-            buf_size).release());
-    if (!shared_mem.get()) {
-      NOTREACHED() << "AllocateSharedMemoryBuffer failed";
+    base::SharedMemory shared_buf;
+    // Allocate a shared memory buffer to hold the generated metafile data.
+    if (!shared_buf.CreateAndMapAnonymous(buf_size)) {
+      NOTREACHED() << "Buffer allocation failed";
       return false;
     }
 
-    if (!shared_mem->Map(buf_size)) {
-      NOTREACHED() << "Map failed";
+    // Copy the bits into shared memory.
+    if (!metafile.GetData(shared_buf.memory(), buf_size)) {
+      NOTREACHED() << "GetData() failed";
+      shared_buf.Unmap();
       return false;
     }
-    metafile.GetData(shared_mem->memory(), buf_size);
+    shared_buf.GiveToProcess(base::GetCurrentProcessHandle(),
+                             &printed_page_params.metafile_data_handle);
+    shared_buf.Unmap();
+
     printed_page_params.data_size = buf_size;
-    shared_mem->GiveToProcess(base::GetCurrentProcessHandle(),
-                              &(printed_page_params.metafile_data_handle));
+    Send(new PrintHostMsg_DuplicateSection(
+        routing_id(),
+        printed_page_params.metafile_data_handle,
+        &printed_page_params.metafile_data_handle));
   }
 
   for (size_t i = 0; i < printed_pages.size(); ++i) {
     printed_page_params.page_number = printed_pages[i];
     Send(new PrintHostMsg_DidPrintPage(routing_id(), printed_page_params));
     // Send the rest of the pages with an invalid metafile handle.
-    printed_page_params.metafile_data_handle.fd = -1;
+    printed_page_params.metafile_data_handle = INVALID_HANDLE_VALUE;
   }
   return true;
-#endif  // defined(OS_CHROMEOS)
 }
 
 void PrintWebViewHelper::PrintPageInternal(
@@ -195,4 +183,30 @@ void PrintWebViewHelper::PrintPageInternal(
     NOTREACHED() << "metafile failed";
 }
 
+bool PrintWebViewHelper::CopyMetafileDataToSharedMem(
+    Metafile* metafile, base::SharedMemoryHandle* shared_mem_handle) {
+  uint32 buf_size = metafile->GetDataSize();
+  base::SharedMemory shared_buf;
+  // Allocate a shared memory buffer to hold the generated metafile data.
+  if (!shared_buf.CreateAndMapAnonymous(buf_size)) {
+    NOTREACHED() << "Buffer allocation failed";
+    return false;
+  }
+
+  // Copy the bits into shared memory.
+  if (!metafile->GetData(shared_buf.memory(), buf_size)) {
+    NOTREACHED() << "GetData() failed";
+    shared_buf.Unmap();
+    return false;
+  }
+  shared_buf.GiveToProcess(base::GetCurrentProcessHandle(), shared_mem_handle);
+  shared_buf.Unmap();
+
+  Send(new PrintHostMsg_DuplicateSection(routing_id(), *shared_mem_handle,
+                                         shared_mem_handle));
+  return true;
+}
+
 }  // namespace printing
+
+#endif // PRINTING_WIN_USES_PDF_AS_METAFILE